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[
"The Dream Desk does not have price advantage.",
"The Dream Desk has been equipped with sensitive LCD monitor and a clear cover.",
"Some parents have offensive feelings toward the orange button indicating commercialism.",
"The computer system fails to cater for all the parents."
] | Which of the following is NOT true according to Paragraph 6? | Just over 20 years ago, IBM introduced the PC jr. Derided as awkward and underpowered, the PC jr. Never caught on with kids or parents. But then again, IBM didn't have the Mouse behind it.
Backed by a posse of Mickey, Minnie, and Pluto, the Walt Disney Co. is looking to do what IBM never could: successfully market a computer system designed specifically for kids. The Disney Dream Desk PC（$600）and its complementary big-eared, 14.1-inch monitor（$300）are aimed at kids ranging from 6 to 12 years old. But even though the system is embellished with images of Mickey and software featuring Donald Duck and Goofy, the Dream Desk is more than a toy.
Using Microsoft Windows XP, the Disney system is based on an Intel Celeron D processor and comes with a 40-gigabyte hard drive plus a combination CD burner and DVD player-serious enough hardware to manage games or homework. As an added feature, there's a stylus that sits in a cradle built into the keyboard. The stylus is a more comfortable pointing device than a mouse for little hands, and it also lets children create their own digital sketches.
Teaching tool. On the software side, Disney has included a trio of creativity programs called Disney Flix, Pix, and Mix that lets kids create their own movies, add Disney characters to digital pictures, and compose music. For parents worried about the World Wild Web, Disney has included a Content Protect program that prevents curious tykes from visiting sites you'd rather they not view. And if you suspect they are using the Net more for games than research, the program will even track your children's surfing and report back to you.
By and large, the Disney system succeeds with the Dream Desk. Design elements like the monitor's mouseketeer ears, which conceal speakers, certainly grabbed my 22-month-old daughter's attention. But while she may have enjoyed" playing with Mickey," parents may wonder if computers for kids are a help or hindrance when it comes to learning. " The danger is that people tend to replace actual human instruction with these computers," says Reid Lyon, chief of the Child Development and Behavior Branch of the National Institute of Child Health and Human Development at the National Institutes of Health. According to Lyon, computers are a fine tool to help kids learn-as long as there's parental participation.
Parents looking for educational titles on the Dream Desk will have to shop elsewhere. Furthermore, the total system price is about $150 more than comparably equipped plain-Jane PCs, and some elements of the Disney PC could be improved. Making the LCD monitor touch sensitive would be a nice addition for kids, as would a clear cover to protect the screen from sticky little fingers. In addition, some parents may bridle at the brazen commercialism of having a large orange button on the system's keyboard that takes kids directly to Disney's $9.95-a-month Toontown online game.
On the other hand, what parent hasn't succumbed to a son or daughter's desire for a SpongeBob toy, Spiderman lunchbox, or Dora backpack? And while this PC may have big ears, it's not just some Mickey Mouse computer. | 494.txt | 1 |
[
"The big ears make this PC look like a big toy that many kids long for.",
"Parents always try their best to satisfy their kids' needs.",
"Parents find it difficult to refuse to buy their kids such toys as Mickey Mouse computer.",
"Mickey Mouse computer is a computer, rather than a toy."
] | What can we learn from the last paragraph? | Just over 20 years ago, IBM introduced the PC jr. Derided as awkward and underpowered, the PC jr. Never caught on with kids or parents. But then again, IBM didn't have the Mouse behind it.
Backed by a posse of Mickey, Minnie, and Pluto, the Walt Disney Co. is looking to do what IBM never could: successfully market a computer system designed specifically for kids. The Disney Dream Desk PC（$600）and its complementary big-eared, 14.1-inch monitor（$300）are aimed at kids ranging from 6 to 12 years old. But even though the system is embellished with images of Mickey and software featuring Donald Duck and Goofy, the Dream Desk is more than a toy.
Using Microsoft Windows XP, the Disney system is based on an Intel Celeron D processor and comes with a 40-gigabyte hard drive plus a combination CD burner and DVD player-serious enough hardware to manage games or homework. As an added feature, there's a stylus that sits in a cradle built into the keyboard. The stylus is a more comfortable pointing device than a mouse for little hands, and it also lets children create their own digital sketches.
Teaching tool. On the software side, Disney has included a trio of creativity programs called Disney Flix, Pix, and Mix that lets kids create their own movies, add Disney characters to digital pictures, and compose music. For parents worried about the World Wild Web, Disney has included a Content Protect program that prevents curious tykes from visiting sites you'd rather they not view. And if you suspect they are using the Net more for games than research, the program will even track your children's surfing and report back to you.
By and large, the Disney system succeeds with the Dream Desk. Design elements like the monitor's mouseketeer ears, which conceal speakers, certainly grabbed my 22-month-old daughter's attention. But while she may have enjoyed" playing with Mickey," parents may wonder if computers for kids are a help or hindrance when it comes to learning. " The danger is that people tend to replace actual human instruction with these computers," says Reid Lyon, chief of the Child Development and Behavior Branch of the National Institute of Child Health and Human Development at the National Institutes of Health. According to Lyon, computers are a fine tool to help kids learn-as long as there's parental participation.
Parents looking for educational titles on the Dream Desk will have to shop elsewhere. Furthermore, the total system price is about $150 more than comparably equipped plain-Jane PCs, and some elements of the Disney PC could be improved. Making the LCD monitor touch sensitive would be a nice addition for kids, as would a clear cover to protect the screen from sticky little fingers. In addition, some parents may bridle at the brazen commercialism of having a large orange button on the system's keyboard that takes kids directly to Disney's $9.95-a-month Toontown online game.
On the other hand, what parent hasn't succumbed to a son or daughter's desire for a SpongeBob toy, Spiderman lunchbox, or Dora backpack? And while this PC may have big ears, it's not just some Mickey Mouse computer. | 494.txt | 2 |
[
"7",
"8",
"9",
"10"
] | How many kinds of crimes are mentioned in the passage? | Crime in Computer
New and bizarre crimes have come into being with theadvent of computer technology. Organized crime to has beendirectly involved; the new technology offers it unlimitedopportunities, such as data crimes, theft of services, property-related crimes, industrial sabotage, politically related sabotage,vandalism, crimes against the individual and financially relatedcrimes…
Theft of data, or data crime, has attracted the interest of organized criminal syndicates. This isusually the theft or copying of valuable computer grogram. An international market already existsfor computerized data, and specialized fences are said to be playing a key role in this rapidlyexpanding criminal market. Buyers for stolen programs may range from a firm's competitors toforeign nations.
A competitor sabotages a company's computer system to destroy or cripple the firm'soperational ability, thus neutralizing its competitive capability either in the private or thegovernment sector. This computer sabotage may also be tied to an attempt by affluent investorsto acquire the victim firm. With the growing reliance by firms on computers for their recordkeepingand daily operations, sabotage of their computers can result in internal havoc, after which thegroup interested in acquiring the firm can easily buy it at a substantially lower price. Criminal groupscould also resort to sabotage if the company is a competitor of a business owned or controlled byorganized crime.
Politically motivated sabotage is on the increase; political extremist groups have sprouted onevery continent. Sophisticated computer technology arms these groups with awesome powersand opens technologically advanced nations to their attack. Several attempts have already beenmade to destroy computer facility at an air force base. A university computer facility involved innational defence work suffered more than $2 million in damages as a result of a bombing.
Computer vulnerability has been amply documented. One congressional study concluded thatneither government nor private computer systems are adequately protected against sabotage.Organized criminal syndicates have shown their willingness to work with politically motivatedgroups. Investigators have uncovered evidence of cooperation between criminal groups andforeign governments in narcotics. Criminal groups have taken attempts in assassinating politicalleaders…. Computers are used in hospital life-support system, in laboratories, and in major surgery.Criminals could easily turn these computers into tools of devastation. By sabotaging the computerof a life-support system, criminals could kill an individual as easily as they had used a gun. Bymanipulating a computer, they could guide awesome tools of terror against large urban centers.Cities and nations could become hostages. Homicide could take a now form. The computer maybecome the hit man of the twentieth century.
The computer opens vast areas of crime to organized criminal groups, both national andinternational. It calls on them to pool their resources and increase their cooperative efforts,because many of these crimes are too complex for one group to handle, especially those requitinga vast network of fences. Although criminals have adapted to computer technology, lawenforcement has not. Many still think in terms of traditional criminology. | 211.txt | 1 |
[
"His purpose is to destroy or weaken the firm's operational ability.",
"His purpose is to weaken firm's competitive capability and get it.",
"His purpose is to buy the rival's company at a relatively low price.",
"His purpose is to steal important data."
] | What is the purpose of a competitor to sabotage a company's computer? | Crime in Computer
New and bizarre crimes have come into being with theadvent of computer technology. Organized crime to has beendirectly involved; the new technology offers it unlimitedopportunities, such as data crimes, theft of services, property-related crimes, industrial sabotage, politically related sabotage,vandalism, crimes against the individual and financially relatedcrimes…
Theft of data, or data crime, has attracted the interest of organized criminal syndicates. This isusually the theft or copying of valuable computer grogram. An international market already existsfor computerized data, and specialized fences are said to be playing a key role in this rapidlyexpanding criminal market. Buyers for stolen programs may range from a firm's competitors toforeign nations.
A competitor sabotages a company's computer system to destroy or cripple the firm'soperational ability, thus neutralizing its competitive capability either in the private or thegovernment sector. This computer sabotage may also be tied to an attempt by affluent investorsto acquire the victim firm. With the growing reliance by firms on computers for their recordkeepingand daily operations, sabotage of their computers can result in internal havoc, after which thegroup interested in acquiring the firm can easily buy it at a substantially lower price. Criminal groupscould also resort to sabotage if the company is a competitor of a business owned or controlled byorganized crime.
Politically motivated sabotage is on the increase; political extremist groups have sprouted onevery continent. Sophisticated computer technology arms these groups with awesome powersand opens technologically advanced nations to their attack. Several attempts have already beenmade to destroy computer facility at an air force base. A university computer facility involved innational defence work suffered more than $2 million in damages as a result of a bombing.
Computer vulnerability has been amply documented. One congressional study concluded thatneither government nor private computer systems are adequately protected against sabotage.Organized criminal syndicates have shown their willingness to work with politically motivatedgroups. Investigators have uncovered evidence of cooperation between criminal groups andforeign governments in narcotics. Criminal groups have taken attempts in assassinating politicalleaders…. Computers are used in hospital life-support system, in laboratories, and in major surgery.Criminals could easily turn these computers into tools of devastation. By sabotaging the computerof a life-support system, criminals could kill an individual as easily as they had used a gun. Bymanipulating a computer, they could guide awesome tools of terror against large urban centers.Cities and nations could become hostages. Homicide could take a now form. The computer maybecome the hit man of the twentieth century.
The computer opens vast areas of crime to organized criminal groups, both national andinternational. It calls on them to pool their resources and increase their cooperative efforts,because many of these crimes are too complex for one group to handle, especially those requitinga vast network of fences. Although criminals have adapted to computer technology, lawenforcement has not. Many still think in terms of traditional criminology. | 211.txt | 1 |
[
"Sabotage of a university computer.",
"Sabotage of a hospital computer.",
"Sabotage of computer at a secret training base.",
"Sabotage of a factory computer."
] | Which of the following can be labeled as a politically motivated sabotage of a computer system? | Crime in Computer
New and bizarre crimes have come into being with theadvent of computer technology. Organized crime to has beendirectly involved; the new technology offers it unlimitedopportunities, such as data crimes, theft of services, property-related crimes, industrial sabotage, politically related sabotage,vandalism, crimes against the individual and financially relatedcrimes…
Theft of data, or data crime, has attracted the interest of organized criminal syndicates. This isusually the theft or copying of valuable computer grogram. An international market already existsfor computerized data, and specialized fences are said to be playing a key role in this rapidlyexpanding criminal market. Buyers for stolen programs may range from a firm's competitors toforeign nations.
A competitor sabotages a company's computer system to destroy or cripple the firm'soperational ability, thus neutralizing its competitive capability either in the private or thegovernment sector. This computer sabotage may also be tied to an attempt by affluent investorsto acquire the victim firm. With the growing reliance by firms on computers for their recordkeepingand daily operations, sabotage of their computers can result in internal havoc, after which thegroup interested in acquiring the firm can easily buy it at a substantially lower price. Criminal groupscould also resort to sabotage if the company is a competitor of a business owned or controlled byorganized crime.
Politically motivated sabotage is on the increase; political extremist groups have sprouted onevery continent. Sophisticated computer technology arms these groups with awesome powersand opens technologically advanced nations to their attack. Several attempts have already beenmade to destroy computer facility at an air force base. A university computer facility involved innational defence work suffered more than $2 million in damages as a result of a bombing.
Computer vulnerability has been amply documented. One congressional study concluded thatneither government nor private computer systems are adequately protected against sabotage.Organized criminal syndicates have shown their willingness to work with politically motivatedgroups. Investigators have uncovered evidence of cooperation between criminal groups andforeign governments in narcotics. Criminal groups have taken attempts in assassinating politicalleaders…. Computers are used in hospital life-support system, in laboratories, and in major surgery.Criminals could easily turn these computers into tools of devastation. By sabotaging the computerof a life-support system, criminals could kill an individual as easily as they had used a gun. Bymanipulating a computer, they could guide awesome tools of terror against large urban centers.Cities and nations could become hostages. Homicide could take a now form. The computer maybecome the hit man of the twentieth century.
The computer opens vast areas of crime to organized criminal groups, both national andinternational. It calls on them to pool their resources and increase their cooperative efforts,because many of these crimes are too complex for one group to handle, especially those requitinga vast network of fences. Although criminals have adapted to computer technology, lawenforcement has not. Many still think in terms of traditional criminology. | 211.txt | 2 |
[
"There is no need to use a gun in killing a person.",
"Criminals can kill whoever they want by a computer.",
"The computer can replace any weapons.",
"The function of a computer is just like a gun."
] | What does the author mean by "Homicide could take a new form"? | Crime in Computer
New and bizarre crimes have come into being with theadvent of computer technology. Organized crime to has beendirectly involved; the new technology offers it unlimitedopportunities, such as data crimes, theft of services, property-related crimes, industrial sabotage, politically related sabotage,vandalism, crimes against the individual and financially relatedcrimes…
Theft of data, or data crime, has attracted the interest of organized criminal syndicates. This isusually the theft or copying of valuable computer grogram. An international market already existsfor computerized data, and specialized fences are said to be playing a key role in this rapidlyexpanding criminal market. Buyers for stolen programs may range from a firm's competitors toforeign nations.
A competitor sabotages a company's computer system to destroy or cripple the firm'soperational ability, thus neutralizing its competitive capability either in the private or thegovernment sector. This computer sabotage may also be tied to an attempt by affluent investorsto acquire the victim firm. With the growing reliance by firms on computers for their recordkeepingand daily operations, sabotage of their computers can result in internal havoc, after which thegroup interested in acquiring the firm can easily buy it at a substantially lower price. Criminal groupscould also resort to sabotage if the company is a competitor of a business owned or controlled byorganized crime.
Politically motivated sabotage is on the increase; political extremist groups have sprouted onevery continent. Sophisticated computer technology arms these groups with awesome powersand opens technologically advanced nations to their attack. Several attempts have already beenmade to destroy computer facility at an air force base. A university computer facility involved innational defence work suffered more than $2 million in damages as a result of a bombing.
Computer vulnerability has been amply documented. One congressional study concluded thatneither government nor private computer systems are adequately protected against sabotage.Organized criminal syndicates have shown their willingness to work with politically motivatedgroups. Investigators have uncovered evidence of cooperation between criminal groups andforeign governments in narcotics. Criminal groups have taken attempts in assassinating politicalleaders…. Computers are used in hospital life-support system, in laboratories, and in major surgery.Criminals could easily turn these computers into tools of devastation. By sabotaging the computerof a life-support system, criminals could kill an individual as easily as they had used a gun. Bymanipulating a computer, they could guide awesome tools of terror against large urban centers.Cities and nations could become hostages. Homicide could take a now form. The computer maybecome the hit man of the twentieth century.
The computer opens vast areas of crime to organized criminal groups, both national andinternational. It calls on them to pool their resources and increase their cooperative efforts,because many of these crimes are too complex for one group to handle, especially those requitinga vast network of fences. Although criminals have adapted to computer technology, lawenforcement has not. Many still think in terms of traditional criminology. | 211.txt | 1 |
[
"not to eat in inns",
"not to eat soup that is too hot",
"to cry when we burn our mouth",
"not to believe everything you hear"
] | This story teaches us _ . | A nobleman and a merchant once met in an inn. For their lunch they both ordered soup. When it was brought, the nobleman took a spoonful, but the soup was so hot that he burned his mouth and tears came to his eyes, The merchant asked him why he was weeping. The nobleman was ashamed to admit that he had burned his mouth and answered, "Sir, I once had a brother who committed a great crime , for which he was hanged. I was thinking of his death, and that made me weep." The merchant believed this story and began to eat his soup. He too burned his mouth, so that he had tears in his eyes. The nobleman noticed it and asked the merchant, "Sir, why do you weep?" The merchant, who now saw that the nobleman had deceived him, answered, "My lord(=master), I am weeping because you were not hanged together with your brother." | 1996.txt | 3 |
[
"was a nobleman",
"felt ashamed",
"was in an inn",
"was angry"
] | The nobleman did not tell the truth because he _ . | A nobleman and a merchant once met in an inn. For their lunch they both ordered soup. When it was brought, the nobleman took a spoonful, but the soup was so hot that he burned his mouth and tears came to his eyes, The merchant asked him why he was weeping. The nobleman was ashamed to admit that he had burned his mouth and answered, "Sir, I once had a brother who committed a great crime , for which he was hanged. I was thinking of his death, and that made me weep." The merchant believed this story and began to eat his soup. He too burned his mouth, so that he had tears in his eyes. The nobleman noticed it and asked the merchant, "Sir, why do you weep?" The merchant, who now saw that the nobleman had deceived him, answered, "My lord(=master), I am weeping because you were not hanged together with your brother." | 1996.txt | 1 |
[
"smiled with joy",
"shouted with laughter",
"told the truth",
"scolded the waiter"
] | The nobleman should have _ . | A nobleman and a merchant once met in an inn. For their lunch they both ordered soup. When it was brought, the nobleman took a spoonful, but the soup was so hot that he burned his mouth and tears came to his eyes, The merchant asked him why he was weeping. The nobleman was ashamed to admit that he had burned his mouth and answered, "Sir, I once had a brother who committed a great crime , for which he was hanged. I was thinking of his death, and that made me weep." The merchant believed this story and began to eat his soup. He too burned his mouth, so that he had tears in his eyes. The nobleman noticed it and asked the merchant, "Sir, why do you weep?" The merchant, who now saw that the nobleman had deceived him, answered, "My lord(=master), I am weeping because you were not hanged together with your brother." | 1996.txt | 2 |
[
"had no brother who was hanged",
"had a very good brother",
"knew the soup was too hot",
"had never eaten soup"
] | It is probable that the nobleman _ . | A nobleman and a merchant once met in an inn. For their lunch they both ordered soup. When it was brought, the nobleman took a spoonful, but the soup was so hot that he burned his mouth and tears came to his eyes, The merchant asked him why he was weeping. The nobleman was ashamed to admit that he had burned his mouth and answered, "Sir, I once had a brother who committed a great crime , for which he was hanged. I was thinking of his death, and that made me weep." The merchant believed this story and began to eat his soup. He too burned his mouth, so that he had tears in his eyes. The nobleman noticed it and asked the merchant, "Sir, why do you weep?" The merchant, who now saw that the nobleman had deceived him, answered, "My lord(=master), I am weeping because you were not hanged together with your brother." | 1996.txt | 0 |
[
"was very happy",
"believed the nobleman",
"was angry with the nobleman",
"had kind heart"
] | The merchant's answer showed that be _ . | A nobleman and a merchant once met in an inn. For their lunch they both ordered soup. When it was brought, the nobleman took a spoonful, but the soup was so hot that he burned his mouth and tears came to his eyes, The merchant asked him why he was weeping. The nobleman was ashamed to admit that he had burned his mouth and answered, "Sir, I once had a brother who committed a great crime , for which he was hanged. I was thinking of his death, and that made me weep." The merchant believed this story and began to eat his soup. He too burned his mouth, so that he had tears in his eyes. The nobleman noticed it and asked the merchant, "Sir, why do you weep?" The merchant, who now saw that the nobleman had deceived him, answered, "My lord(=master), I am weeping because you were not hanged together with your brother." | 1996.txt | 2 |
[
"it is common that people tell white lies",
"Dick could do nothing about bad traffic",
"it is common that people delay their payment",
"Dick found it hard to deal with everyday problems"
] | When the writer says "Dick Spivak is just an ordinary man," he means _ . | At 9:00 Dick Spivak's bank telephoned and said his payment was late. "The check is in the post," Dick replied quickly. At 11:45 Dick left for a 12:00 meeting across town. Arriving late, he explained that traffic (） had been bad. That evening, Dick's girlfriend wore a new dress. He hated it. "It looks just great on you," he said.
Three lies in one day! Yet Dick Spivak is just an ordinary man. Each time, he told himself that sometimes the truth causes too many problems. Most of us tell much the same white lies, harmless untruths that help to save trouble. How often do we tell white lies? It depends in part on our age, education, and even where we live. According to one US study, women are more truthful than men, and honesty increases as we get older.
While most people use little white lies to make life easier, the majority of Americans care about honesty in both public and personal life. They say that people today are less honest than they were ten years ago. Although it is believed that things are getting worse, lying seems to be an age-old human problem. The French philosopher(） Vauvenarges, writing in the eighteenth century, touched on the truth when he wrote, "All men are born truthful and die liars (）." | 3578.txt | 0 |
[
"hate white lies",
"believe white lies",
"value honesty",
"consider others dishonest"
] | According to the text, Most Americans _ . | At 9:00 Dick Spivak's bank telephoned and said his payment was late. "The check is in the post," Dick replied quickly. At 11:45 Dick left for a 12:00 meeting across town. Arriving late, he explained that traffic (） had been bad. That evening, Dick's girlfriend wore a new dress. He hated it. "It looks just great on you," he said.
Three lies in one day! Yet Dick Spivak is just an ordinary man. Each time, he told himself that sometimes the truth causes too many problems. Most of us tell much the same white lies, harmless untruths that help to save trouble. How often do we tell white lies? It depends in part on our age, education, and even where we live. According to one US study, women are more truthful than men, and honesty increases as we get older.
While most people use little white lies to make life easier, the majority of Americans care about honesty in both public and personal life. They say that people today are less honest than they were ten years ago. Although it is believed that things are getting worse, lying seems to be an age-old human problem. The French philosopher(） Vauvenarges, writing in the eighteenth century, touched on the truth when he wrote, "All men are born truthful and die liars (）." | 3578.txt | 2 |
[
"lying is an age -old human problem",
"dishonesty increases as people get older",
"people were dishonest in the 18th century",
"it is social conditions that make people tell lies"
] | Vauvenarges' remark suggests that _ . | At 9:00 Dick Spivak's bank telephoned and said his payment was late. "The check is in the post," Dick replied quickly. At 11:45 Dick left for a 12:00 meeting across town. Arriving late, he explained that traffic (） had been bad. That evening, Dick's girlfriend wore a new dress. He hated it. "It looks just great on you," he said.
Three lies in one day! Yet Dick Spivak is just an ordinary man. Each time, he told himself that sometimes the truth causes too many problems. Most of us tell much the same white lies, harmless untruths that help to save trouble. How often do we tell white lies? It depends in part on our age, education, and even where we live. According to one US study, women are more truthful than men, and honesty increases as we get older.
While most people use little white lies to make life easier, the majority of Americans care about honesty in both public and personal life. They say that people today are less honest than they were ten years ago. Although it is believed that things are getting worse, lying seems to be an age-old human problem. The French philosopher(） Vauvenarges, writing in the eighteenth century, touched on the truth when he wrote, "All men are born truthful and die liars (）." | 3578.txt | 3 |
[
"The dye is often produced in Sudan.",
"The dye has something to do with the country named Sudan.",
"Nobody is sure of the origin of the name.",
"Many foods produced in Sudan contain the dye."
] | How did the Sudan?1 get its name? | Ever since news of widespread food recalls caused by a carcinogenic dye broke, there has been confusion over possible links to the country of the same name, but Sudan officials say there is no connection whatever.
Sudan?1 is a red industrial dye that has been found in some chilli powder, but was banned in food products across the European Union (EU) in July 2003.
Since the ban was put in place, EU officials have been striving to remove some food products from the shelves. So far 580 products have been recalled.
Last week Sudan‘s Embassy in the United Kingdom asked the Food Standards Agency (FSA) for clarification of the origin of the dye‘s name.
Omaima Mahmoud Al Sharief, a press official at Sudan‘s Embassy in China, explained the purpose of the inquiry was to clear up any misunderstanding over links between the country and the poisonous dye.
"We want to keep an eye on every detail and avoid any misunderstanding there," she said. "Our embassy to Britain asked them how the dye got that name and whether the dye had something to do with our country. But they told us there was no relationship."
The FSA, an independent food security watchdog in Britain, received a letter from the Sudanese embassy last week.
"They asked us why the dye is named Sudan, however, we also do not know how it got the name," she said. "People found the dye in 1883 and gave it the name. Nobody knows the reason, and we cannot give any explanation before we find out."
Sudan dyes, which include Sudan?1 to 4, are red dyes used for colouring solvents, oils, waxes, petrol, and shoe and floor polishes. They are classified as carcinogens by the International Agency for Research on Cancer. | 2600.txt | 2 |
[
"the Sudan government is paying much attention to the food safety",
"Sudan?1 is often used to be added to the food",
"people didn't realize the danger of Sudan?1 until 2003",
"many food shops will be closed down"
] | We can infer from the passage that. | Ever since news of widespread food recalls caused by a carcinogenic dye broke, there has been confusion over possible links to the country of the same name, but Sudan officials say there is no connection whatever.
Sudan?1 is a red industrial dye that has been found in some chilli powder, but was banned in food products across the European Union (EU) in July 2003.
Since the ban was put in place, EU officials have been striving to remove some food products from the shelves. So far 580 products have been recalled.
Last week Sudan‘s Embassy in the United Kingdom asked the Food Standards Agency (FSA) for clarification of the origin of the dye‘s name.
Omaima Mahmoud Al Sharief, a press official at Sudan‘s Embassy in China, explained the purpose of the inquiry was to clear up any misunderstanding over links between the country and the poisonous dye.
"We want to keep an eye on every detail and avoid any misunderstanding there," she said. "Our embassy to Britain asked them how the dye got that name and whether the dye had something to do with our country. But they told us there was no relationship."
The FSA, an independent food security watchdog in Britain, received a letter from the Sudanese embassy last week.
"They asked us why the dye is named Sudan, however, we also do not know how it got the name," she said. "People found the dye in 1883 and gave it the name. Nobody knows the reason, and we cannot give any explanation before we find out."
Sudan dyes, which include Sudan?1 to 4, are red dyes used for colouring solvents, oils, waxes, petrol, and shoe and floor polishes. They are classified as carcinogens by the International Agency for Research on Cancer. | 2600.txt | 1 |
[
"Keep away from Sudan?1",
"No Sudan?1 dye links to the country",
"How Sudan?1 dye got its name",
"Pay attention to the food safety"
] | Which of the following is the best title? | Ever since news of widespread food recalls caused by a carcinogenic dye broke, there has been confusion over possible links to the country of the same name, but Sudan officials say there is no connection whatever.
Sudan?1 is a red industrial dye that has been found in some chilli powder, but was banned in food products across the European Union (EU) in July 2003.
Since the ban was put in place, EU officials have been striving to remove some food products from the shelves. So far 580 products have been recalled.
Last week Sudan‘s Embassy in the United Kingdom asked the Food Standards Agency (FSA) for clarification of the origin of the dye‘s name.
Omaima Mahmoud Al Sharief, a press official at Sudan‘s Embassy in China, explained the purpose of the inquiry was to clear up any misunderstanding over links between the country and the poisonous dye.
"We want to keep an eye on every detail and avoid any misunderstanding there," she said. "Our embassy to Britain asked them how the dye got that name and whether the dye had something to do with our country. But they told us there was no relationship."
The FSA, an independent food security watchdog in Britain, received a letter from the Sudanese embassy last week.
"They asked us why the dye is named Sudan, however, we also do not know how it got the name," she said. "People found the dye in 1883 and gave it the name. Nobody knows the reason, and we cannot give any explanation before we find out."
Sudan dyes, which include Sudan?1 to 4, are red dyes used for colouring solvents, oils, waxes, petrol, and shoe and floor polishes. They are classified as carcinogens by the International Agency for Research on Cancer. | 2600.txt | 1 |
[
"discovering methods of eliminating harmful microorganisms without subsequently generating drug-resistant bacterial",
"explaining reasons for congressional inaction on the regulation of gene transplant experiments",
"describing a problematic agricultural practice and its serious genetic consequences",
"verifying the therapeutic ineffectiveness of anti-infective drugs"
] | In the passage, the author is primarily concerned with | The Food and Drug Administration has recently proposed severe restrictions on the use of antibiotics to promote the health and growth of meat animals. Medications added to feeds kill many microorganisms but also encourage the appearance of bacterial strains that are resistant to anti-infective drugs. Already, for example, penicillin and the tetracvlines are not as effective therapeutically as they once were. The drug resistance is chiefly conferred by tiny circlets of genes, called plasmids, that can be exchanged between different strains and even different species of bacteria. Plasmids are also one of the two kinds of vehicles (the other being viruses) that molecular biologists depend on when performing gene transplant experiments. Even present guidelines forbid the laboratory use of plasmids bearing genes for resistance to antibiotics. Yet, while congressional debate rages over whether or not to toughen these restrictions on scientists in their laboratories,little congressional attention has been focused on an ill-advised agricultural practice that produces known deleterious effects. | 1956.txt | 2 |
[
"Microorganisms resistant to drugs",
"Therapeutically useful circlets of genes",
"Anti-infective drugs like penicillin",
"Viruses for use by molecular biologists"
] | According to the passage, the exchange of plasmids between different bacteria can result in which of the following? | The Food and Drug Administration has recently proposed severe restrictions on the use of antibiotics to promote the health and growth of meat animals. Medications added to feeds kill many microorganisms but also encourage the appearance of bacterial strains that are resistant to anti-infective drugs. Already, for example, penicillin and the tetracvlines are not as effective therapeutically as they once were. The drug resistance is chiefly conferred by tiny circlets of genes, called plasmids, that can be exchanged between different strains and even different species of bacteria. Plasmids are also one of the two kinds of vehicles (the other being viruses) that molecular biologists depend on when performing gene transplant experiments. Even present guidelines forbid the laboratory use of plasmids bearing genes for resistance to antibiotics. Yet, while congressional debate rages over whether or not to toughen these restrictions on scientists in their laboratories,little congressional attention has been focused on an ill-advised agricultural practice that produces known deleterious effects. | 1956.txt | 0 |
[
"encourage experiments with any plasmids except those bearing genes for antibiotic resistance",
"question the addition of anti-infective drugs to livestock feeds",
"resist the use of penicillin and tetracyc-lines to kill microorganisms",
"agree to the development of meatier live-stock through the use of antibiotics"
] | It can be inferred from the passage that the author believes that those in favor of stiffening the restrictions on gene transplant research should logically also | The Food and Drug Administration has recently proposed severe restrictions on the use of antibiotics to promote the health and growth of meat animals. Medications added to feeds kill many microorganisms but also encourage the appearance of bacterial strains that are resistant to anti-infective drugs. Already, for example, penicillin and the tetracvlines are not as effective therapeutically as they once were. The drug resistance is chiefly conferred by tiny circlets of genes, called plasmids, that can be exchanged between different strains and even different species of bacteria. Plasmids are also one of the two kinds of vehicles (the other being viruses) that molecular biologists depend on when performing gene transplant experiments. Even present guidelines forbid the laboratory use of plasmids bearing genes for resistance to antibiotics. Yet, while congressional debate rages over whether or not to toughen these restrictions on scientists in their laboratories,little congressional attention has been focused on an ill-advised agricultural practice that produces known deleterious effects. | 1956.txt | 1 |
[
"indifferent",
"perplexed",
"pretentious",
"apprehensive"
] | The author's attitude toward the development of bacterial strains that render antibiotic drugs ineffective can best be described as | The Food and Drug Administration has recently proposed severe restrictions on the use of antibiotics to promote the health and growth of meat animals. Medications added to feeds kill many microorganisms but also encourage the appearance of bacterial strains that are resistant to anti-infective drugs. Already, for example, penicillin and the tetracvlines are not as effective therapeutically as they once were. The drug resistance is chiefly conferred by tiny circlets of genes, called plasmids, that can be exchanged between different strains and even different species of bacteria. Plasmids are also one of the two kinds of vehicles (the other being viruses) that molecular biologists depend on when performing gene transplant experiments. Even present guidelines forbid the laboratory use of plasmids bearing genes for resistance to antibiotics. Yet, while congressional debate rages over whether or not to toughen these restrictions on scientists in their laboratories,little congressional attention has been focused on an ill-advised agricultural practice that produces known deleterious effects. | 1956.txt | 3 |
[
"great tension between two oppositely charged regions.",
"an increase in negatively charged particles over positively charged particles.",
"oppositely charged particles coming together.",
"the release of electrical energy in the form of visible light."
] | According to paragraph 1, all of the following take place in the development of a flash of lightening EXCEPT | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 1 |
[
"distinct.",
"growing.",
"huge.",
"immediate."
] | The word "tremendous" in passage 1 is closest in meaning to | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 2 |
[
"Collisions with ice pellets.",
"Collisions with negatively charged ice crystals at the base of the cloud.",
"Becoming concentrated in the central region of the cloud.",
"Forming at a temperature greater than -15℃."
] | According to paragraph 2, what causes ice crystal to become positively charged? | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 0 |
[
"reject.",
"obtain.",
"need.",
"produce."
] | The word "acquire" in passage 2 is closest in meaning to | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 1 |
[
"Collisions between ice crystals and ice pellets increase in number in the lower part of the cloud.",
"The lower part of the cloud is smaller than the region above it.",
"More ice pellets than ice crystals reach the lower part of the cloud.",
"Temperature in the lower part of the cloud are warmer than -15℃."
] | According to paragraph 2, why are positively charged ice pellets produced in the lower part of the cloud? | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 3 |
[
"a shift of electrical charged between ice pellets and ice crystals.",
"negatively charged ice pellets that remain in the middle.",
"a temperature of -15℃ or less.",
"the development of a positive charge at the base of the cloud."
] | According to paragraph 2, the middle region of a cloud becomes negatively charged due to all of the following EXCEPT | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 3 |
[
"the top of the cloud is warmer than the middle of the cloud.",
"the middle of the cloud is already occupied by positively charged particles.",
"the negatively charged ice pellets are too heavy to be carried by the updrafts that move ice crystals.",
"collisions between ice pellets in the top of the cloud produce mainly positively charged particles."
] | It can be inferred from paragraph 2 that part of the reason that the top of a storm cloud becomes positively charged is that | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 2 |
[
"this form of lightning has been investigated so much.",
"this form of lightning is not as common as lightning within a cloud.",
"scientific understanding of this form of lightning is important.",
"the buildup of positive charge on the ground beneath a storm cloud can have serious consequences."
] | The author remarks that (in paragraph 3)"Lightning that strikes the ground is the most likely to be destructive" in order to explain why | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 0 |
[
"opens.",
"completes.",
"lights.",
"electrifies."
] | The word "illuminates" in passage 4 is closet in meaning to | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 2 |
[
"It prevents streams of electrons from the cloud from striking the ground.",
"It completes a channel that connects the storm cloud with the ground.",
"It produces a stream of electrons from the cloud.",
"It widens the path made by the initial stream of electrons from the cloud."
] | According to paragraph5, which of the following is true of the stream of charged particles from the ground? | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 1 |
[
"During a lightning strike the diameter of the channel the electrons follow is considerably enlarged beyond a few centimeters.",
"A building is unlikely to be hit by lightning unless it is at least 100 meters tall.",
"A building is hit by a lightning strike because the building itself has first determined the path the lightening then takes to it.",
"The light of a lightning strike first appears at the point where the streams of negative and positive particles meet."
] | Which of the following claims about lightning strikes can be inferred from paragraph 5? | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 2 |
[
"started.",
"intensified.",
"finished.",
"expected."
] | The word "initiated"in paragraph 5 is closet in meaning to | Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.
The separation of charged particles that forms in a storm cloud has a sandwich-like structure. Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged. Recent measurements made in the field together with laboratory simulations offer a promising explanation of how this structure of charged particles forms. What happens is that small (millimeter-to centimeter-size) pellets of ice form in the cold upper regions of the cloud. When these ice pellets fall, some of them strike much smaller ice crystals in the center of the cloud. The temperature at the center of the cloud is about -15℃ or lower. At such temperatures, the collision between the ice pellets and the ice crystals causes electrical charges to shift so that the ice pellets acquire a negative charge and the ice crystals become positively charged. Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud. The heavier negatively charged ice pellets are left to concentrate in the center. This process explains why the top of the cloud becomes positively charged, while the center becomes negatively charged. The negatively charged region is large: several hundred meters thick and several kilometers in diameter. Below this large, cold, negatively charged region, the cloud is warmer than -15℃, and at these temperatures, collisions between ice crystals and falling ice pellets produce positively charged ice pellets that then populate a small region at the base of the cloud.
Most lightning takes place within a cloud when the charge separation within the cloud collapses. However, as the storm cloud develops, the ground beneath the cloud becomes positively charged and lightning can take place in the form of an electrical discharge between the negative charge of the cloud and the positively charged ground. Lightning that strikes the ground is the most likely to be destructive, so even though it represents only 20 percent of all lightning, it has received a lot of scientific attention.
Using high-speed photography, scientists have determined that there are two steps to the occurrence of lightning from a cloud to the ground. First, a channel, or path, is formed that connects the cloud and the ground. Then a strong current of electrons follows that path from the cloud to the ground, and it is that current that illuminates the channel as the lightning we see.
The formation of the channel is initiated when electrons surge from the cloud base toward the ground. When a stream of these negatively charged electrons comes within 100 meters of the ground it is met by a stream of positively charged particles that comes up from the ground. When the negatively and positively charged streams meet, a complete channel connecting the cloud and the ground is formed. The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning. The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower. That is why the subsequent lightning that follows the completed channel often strikes a tall structure.
Once a channel has been formed, it is usually used by several lightning discharges, each of them consisting of a stream of electrons from the cloud meeting a stream of positive particles along the established path. Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground. The result is a forked lightning that strikes the ground in two places. | 576.txt | 0 |
[
"there are no volcanic activities on hoc spots",
"most hoc spots are located in the inner part of a plate",
"hot spots usually lie. at che boundaries of drifting plates;",
"the passage of plates through hot spots will leave dead volcanoes"
] | We can learn from che first paragraph that _ . | Scattered around the globe are more than 100 small regions of isolated volcanic activity known to geologists as hot spots. Unlike most of the world's volcanoes. they are not always found at the boundaries of the great drifting plates that make up the earth's surface; on the contrary, many of chem lie deep in the interior of a plate. Most of the hot spots move only slowly, and in some cases the movement of the plates past them has left trails of dead volcanoes. The bot spots and their volcanic trails are milestones that mark the passage of the plates.
That the plates are moving is now beyond dispute. Africa and South America. for example. are moving away from each other as new material is injected into the sea floor between them. The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined. The relative motion of the plates carrying these continents has been constructed in detail, but the motion of one plate with respect to another cannot readily be translated into motion with respect to the earth's interior. It is not possible to determine whether both continents are moving in opposite directions or whether one continent is stationary and the other is drifting away from it. Hot spots. anchored in the deeper layers of the earth, provide the measuring instruments needed to resolve the question. From an analysis of the hot-spot population it appears that the African plate is stationary and that it has not moved during the past 30 million years.
The significance of hot spots is not confined lo their role as a frame of reference. It now appears that they also have an important influence on the geophysical processes chat propel the plates across the globe. When a continental plate comes to rest over a hot spot. the material rising from deeper layer creates a broad dome. As the dome grows, it develops deep fissures (cracks); in at least a few cases the continent may break entirely along some of these fissures, so that the hoc spot initiates the formation of a new ocean. Thus just as earlier theories have explained the mobility of the continents, so hot spots may explain their mutability (inconstancy). | 193.txt | 1 |
[
"the motion of the plates corresponds to thar of the earth's interior",
"the geological theory about drifting plates has been proved to be true",
"the hot spots and the plates move slowly in opposite directions",
"the movement of hot spots proves the continents are moving apart"
] | The author believes that _ . | Scattered around the globe are more than 100 small regions of isolated volcanic activity known to geologists as hot spots. Unlike most of the world's volcanoes. they are not always found at the boundaries of the great drifting plates that make up the earth's surface; on the contrary, many of chem lie deep in the interior of a plate. Most of the hot spots move only slowly, and in some cases the movement of the plates past them has left trails of dead volcanoes. The bot spots and their volcanic trails are milestones that mark the passage of the plates.
That the plates are moving is now beyond dispute. Africa and South America. for example. are moving away from each other as new material is injected into the sea floor between them. The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined. The relative motion of the plates carrying these continents has been constructed in detail, but the motion of one plate with respect to another cannot readily be translated into motion with respect to the earth's interior. It is not possible to determine whether both continents are moving in opposite directions or whether one continent is stationary and the other is drifting away from it. Hot spots. anchored in the deeper layers of the earth, provide the measuring instruments needed to resolve the question. From an analysis of the hot-spot population it appears that the African plate is stationary and that it has not moved during the past 30 million years.
The significance of hot spots is not confined lo their role as a frame of reference. It now appears that they also have an important influence on the geophysical processes chat propel the plates across the globe. When a continental plate comes to rest over a hot spot. the material rising from deeper layer creates a broad dome. As the dome grows, it develops deep fissures (cracks); in at least a few cases the continent may break entirely along some of these fissures, so that the hoc spot initiates the formation of a new ocean. Thus just as earlier theories have explained the mobility of the continents, so hot spots may explain their mutability (inconstancy). | 193.txt | 1 |
[
"the two continents are still moving in opposite directions",
"they have been found to share certain geological features",
"the African plate has been stable for 30 million years",
"over 100 hot spots are scattered all around the globe"
] | That Africa and South America were once joined can be deduced from the fact that _ . | Scattered around the globe are more than 100 small regions of isolated volcanic activity known to geologists as hot spots. Unlike most of the world's volcanoes. they are not always found at the boundaries of the great drifting plates that make up the earth's surface; on the contrary, many of chem lie deep in the interior of a plate. Most of the hot spots move only slowly, and in some cases the movement of the plates past them has left trails of dead volcanoes. The bot spots and their volcanic trails are milestones that mark the passage of the plates.
That the plates are moving is now beyond dispute. Africa and South America. for example. are moving away from each other as new material is injected into the sea floor between them. The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined. The relative motion of the plates carrying these continents has been constructed in detail, but the motion of one plate with respect to another cannot readily be translated into motion with respect to the earth's interior. It is not possible to determine whether both continents are moving in opposite directions or whether one continent is stationary and the other is drifting away from it. Hot spots. anchored in the deeper layers of the earth, provide the measuring instruments needed to resolve the question. From an analysis of the hot-spot population it appears that the African plate is stationary and that it has not moved during the past 30 million years.
The significance of hot spots is not confined lo their role as a frame of reference. It now appears that they also have an important influence on the geophysical processes chat propel the plates across the globe. When a continental plate comes to rest over a hot spot. the material rising from deeper layer creates a broad dome. As the dome grows, it develops deep fissures (cracks); in at least a few cases the continent may break entirely along some of these fissures, so that the hoc spot initiates the formation of a new ocean. Thus just as earlier theories have explained the mobility of the continents, so hot spots may explain their mutability (inconstancy). | 193.txt | 1 |
[
"the structure of the African plates.",
"the revival of dead volcanoes.",
"the mobility of the continents.",
"the formation of new oceans."
] | The hot spot theory may prove useful in explaining _ . | Scattered around the globe are more than 100 small regions of isolated volcanic activity known to geologists as hot spots. Unlike most of the world's volcanoes. they are not always found at the boundaries of the great drifting plates that make up the earth's surface; on the contrary, many of chem lie deep in the interior of a plate. Most of the hot spots move only slowly, and in some cases the movement of the plates past them has left trails of dead volcanoes. The bot spots and their volcanic trails are milestones that mark the passage of the plates.
That the plates are moving is now beyond dispute. Africa and South America. for example. are moving away from each other as new material is injected into the sea floor between them. The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined. The relative motion of the plates carrying these continents has been constructed in detail, but the motion of one plate with respect to another cannot readily be translated into motion with respect to the earth's interior. It is not possible to determine whether both continents are moving in opposite directions or whether one continent is stationary and the other is drifting away from it. Hot spots. anchored in the deeper layers of the earth, provide the measuring instruments needed to resolve the question. From an analysis of the hot-spot population it appears that the African plate is stationary and that it has not moved during the past 30 million years.
The significance of hot spots is not confined lo their role as a frame of reference. It now appears that they also have an important influence on the geophysical processes chat propel the plates across the globe. When a continental plate comes to rest over a hot spot. the material rising from deeper layer creates a broad dome. As the dome grows, it develops deep fissures (cracks); in at least a few cases the continent may break entirely along some of these fissures, so that the hoc spot initiates the formation of a new ocean. Thus just as earlier theories have explained the mobility of the continents, so hot spots may explain their mutability (inconstancy). | 193.txt | 3 |
[
"the features of volcanic activities",
"the importance of the theory about drifting plates",
"the significance of hot spots in geophysical studies",
"the process of the formation of volcanoes"
] | The passage is mainly about _ . | Scattered around the globe are more than 100 small regions of isolated volcanic activity known to geologists as hot spots. Unlike most of the world's volcanoes. they are not always found at the boundaries of the great drifting plates that make up the earth's surface; on the contrary, many of chem lie deep in the interior of a plate. Most of the hot spots move only slowly, and in some cases the movement of the plates past them has left trails of dead volcanoes. The bot spots and their volcanic trails are milestones that mark the passage of the plates.
That the plates are moving is now beyond dispute. Africa and South America. for example. are moving away from each other as new material is injected into the sea floor between them. The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined. The relative motion of the plates carrying these continents has been constructed in detail, but the motion of one plate with respect to another cannot readily be translated into motion with respect to the earth's interior. It is not possible to determine whether both continents are moving in opposite directions or whether one continent is stationary and the other is drifting away from it. Hot spots. anchored in the deeper layers of the earth, provide the measuring instruments needed to resolve the question. From an analysis of the hot-spot population it appears that the African plate is stationary and that it has not moved during the past 30 million years.
The significance of hot spots is not confined lo their role as a frame of reference. It now appears that they also have an important influence on the geophysical processes chat propel the plates across the globe. When a continental plate comes to rest over a hot spot. the material rising from deeper layer creates a broad dome. As the dome grows, it develops deep fissures (cracks); in at least a few cases the continent may break entirely along some of these fissures, so that the hoc spot initiates the formation of a new ocean. Thus just as earlier theories have explained the mobility of the continents, so hot spots may explain their mutability (inconstancy). | 193.txt | 2 |
[
"the consequences of lying in various communications media",
"the success of communications technologies in conveying ideas",
"people are less likely to lie in instant messages",
"people's honesty levels across a range of communications media"
] | Hancock's study focuses on _ . | Communications technologies are far from equal when it comes to conveying the truth. The first study to compare honesty across a range of communication media has fund that people are twice as likely to tell lies in phone conversations as they are in emails. The fact that emails are automatically recorded-and can come back to haunt you-appears to be the key to the finding.
Jeff Hancock of Cornell University in Ithaca, New York, asked 30 students to keep a communications diary for a week. In it they noted the number of conversations or email exchanges they had lasting more than 10 minutes, and confessed to how many lies they told. Hancock then worked out the number of lies per conversation for each medium. He found that lies made up 14 per cent of emails, 21 per cent of instant messages, 27 per cent of face-to-face interactions and an astonishing 37 per cent of phone calls.
His results to be presented at the conference on human-computer interaction in Vienna, Austria, in April, have surprised psychologists. Some expected emailers to be the biggest liars, reasoning that because deception makes people uncomfortable, the detachment of emailing would make it easier to lie. Others expected people to lie more in face-to-face exchanges because we are most practised at that form of communication.
But Hancock says it is also crucial whether a conversation is being recorded and could be reread, and whether it occurs in real time. People appear to be afraid to lie when they know the communication could later be used to hold them to account, he says. This is why fewer lies appear in email than on the phone.
People are also more likely to lie in real time-in a instant message or phone call, say-than if they have time to think of a response, says Hancock. He found many lies are spontaneous responses to an unexpected demand, such as: "Do you like my dress?"
Hancock hopes his research will help companies work our the best ways for their employees to communicate. For instance, the phone might be the best medium foe sales where employees are encouraged to stretch the truth. But, given his result, work assessment where honesty is a priority, might be best done using email. | 1528.txt | 3 |
[
"people are less likely to lie in instant messages",
"people are unlikely to lie in face-to-face interactions",
"people are most likely to lie in email communication",
"people are twice as likely to lie in phone conversations"
] | Hancock's research finding surprised those who believed that _ . | Communications technologies are far from equal when it comes to conveying the truth. The first study to compare honesty across a range of communication media has fund that people are twice as likely to tell lies in phone conversations as they are in emails. The fact that emails are automatically recorded-and can come back to haunt you-appears to be the key to the finding.
Jeff Hancock of Cornell University in Ithaca, New York, asked 30 students to keep a communications diary for a week. In it they noted the number of conversations or email exchanges they had lasting more than 10 minutes, and confessed to how many lies they told. Hancock then worked out the number of lies per conversation for each medium. He found that lies made up 14 per cent of emails, 21 per cent of instant messages, 27 per cent of face-to-face interactions and an astonishing 37 per cent of phone calls.
His results to be presented at the conference on human-computer interaction in Vienna, Austria, in April, have surprised psychologists. Some expected emailers to be the biggest liars, reasoning that because deception makes people uncomfortable, the detachment of emailing would make it easier to lie. Others expected people to lie more in face-to-face exchanges because we are most practised at that form of communication.
But Hancock says it is also crucial whether a conversation is being recorded and could be reread, and whether it occurs in real time. People appear to be afraid to lie when they know the communication could later be used to hold them to account, he says. This is why fewer lies appear in email than on the phone.
People are also more likely to lie in real time-in a instant message or phone call, say-than if they have time to think of a response, says Hancock. He found many lies are spontaneous responses to an unexpected demand, such as: "Do you like my dress?"
Hancock hopes his research will help companies work our the best ways for their employees to communicate. For instance, the phone might be the best medium foe sales where employees are encouraged to stretch the truth. But, given his result, work assessment where honesty is a priority, might be best done using email. | 1528.txt | 2 |
[
"They are afraid of leaving behind traces of their lies.",
"They believe that honesty is the best policy.",
"They tend to be relaxed when using those media.",
"They are most practised at those forms of communication."
] | According to the passage, why are people more likely to tell the truth through certain media of communication? | Communications technologies are far from equal when it comes to conveying the truth. The first study to compare honesty across a range of communication media has fund that people are twice as likely to tell lies in phone conversations as they are in emails. The fact that emails are automatically recorded-and can come back to haunt you-appears to be the key to the finding.
Jeff Hancock of Cornell University in Ithaca, New York, asked 30 students to keep a communications diary for a week. In it they noted the number of conversations or email exchanges they had lasting more than 10 minutes, and confessed to how many lies they told. Hancock then worked out the number of lies per conversation for each medium. He found that lies made up 14 per cent of emails, 21 per cent of instant messages, 27 per cent of face-to-face interactions and an astonishing 37 per cent of phone calls.
His results to be presented at the conference on human-computer interaction in Vienna, Austria, in April, have surprised psychologists. Some expected emailers to be the biggest liars, reasoning that because deception makes people uncomfortable, the detachment of emailing would make it easier to lie. Others expected people to lie more in face-to-face exchanges because we are most practised at that form of communication.
But Hancock says it is also crucial whether a conversation is being recorded and could be reread, and whether it occurs in real time. People appear to be afraid to lie when they know the communication could later be used to hold them to account, he says. This is why fewer lies appear in email than on the phone.
People are also more likely to lie in real time-in a instant message or phone call, say-than if they have time to think of a response, says Hancock. He found many lies are spontaneous responses to an unexpected demand, such as: "Do you like my dress?"
Hancock hopes his research will help companies work our the best ways for their employees to communicate. For instance, the phone might be the best medium foe sales where employees are encouraged to stretch the truth. But, given his result, work assessment where honesty is a priority, might be best done using email. | 1528.txt | 3 |
[
"salesmen can talk directly to their customers",
"salesmen may feel less restrained to exaggerate",
"salesmen can impress customers as being trustworthy",
"salesmen may pass on instant messages effectively"
] | According to Hancock the telephone is a preferable medium for promoting sales because _ . | Communications technologies are far from equal when it comes to conveying the truth. The first study to compare honesty across a range of communication media has fund that people are twice as likely to tell lies in phone conversations as they are in emails. The fact that emails are automatically recorded-and can come back to haunt you-appears to be the key to the finding.
Jeff Hancock of Cornell University in Ithaca, New York, asked 30 students to keep a communications diary for a week. In it they noted the number of conversations or email exchanges they had lasting more than 10 minutes, and confessed to how many lies they told. Hancock then worked out the number of lies per conversation for each medium. He found that lies made up 14 per cent of emails, 21 per cent of instant messages, 27 per cent of face-to-face interactions and an astonishing 37 per cent of phone calls.
His results to be presented at the conference on human-computer interaction in Vienna, Austria, in April, have surprised psychologists. Some expected emailers to be the biggest liars, reasoning that because deception makes people uncomfortable, the detachment of emailing would make it easier to lie. Others expected people to lie more in face-to-face exchanges because we are most practised at that form of communication.
But Hancock says it is also crucial whether a conversation is being recorded and could be reread, and whether it occurs in real time. People appear to be afraid to lie when they know the communication could later be used to hold them to account, he says. This is why fewer lies appear in email than on the phone.
People are also more likely to lie in real time-in a instant message or phone call, say-than if they have time to think of a response, says Hancock. He found many lies are spontaneous responses to an unexpected demand, such as: "Do you like my dress?"
Hancock hopes his research will help companies work our the best ways for their employees to communicate. For instance, the phone might be the best medium foe sales where employees are encouraged to stretch the truth. But, given his result, work assessment where honesty is a priority, might be best done using email. | 1528.txt | 0 |
[
"honesty should be encouraged in interpersonal communications",
"more employers will use emails to communicate with their employees",
"suitable media should be chosen for different communication purposes",
"email is now the dominant medium of communication within a company"
] | It can be inferred from the passage that _ . | Communications technologies are far from equal when it comes to conveying the truth. The first study to compare honesty across a range of communication media has fund that people are twice as likely to tell lies in phone conversations as they are in emails. The fact that emails are automatically recorded-and can come back to haunt you-appears to be the key to the finding.
Jeff Hancock of Cornell University in Ithaca, New York, asked 30 students to keep a communications diary for a week. In it they noted the number of conversations or email exchanges they had lasting more than 10 minutes, and confessed to how many lies they told. Hancock then worked out the number of lies per conversation for each medium. He found that lies made up 14 per cent of emails, 21 per cent of instant messages, 27 per cent of face-to-face interactions and an astonishing 37 per cent of phone calls.
His results to be presented at the conference on human-computer interaction in Vienna, Austria, in April, have surprised psychologists. Some expected emailers to be the biggest liars, reasoning that because deception makes people uncomfortable, the detachment of emailing would make it easier to lie. Others expected people to lie more in face-to-face exchanges because we are most practised at that form of communication.
But Hancock says it is also crucial whether a conversation is being recorded and could be reread, and whether it occurs in real time. People appear to be afraid to lie when they know the communication could later be used to hold them to account, he says. This is why fewer lies appear in email than on the phone.
People are also more likely to lie in real time-in a instant message or phone call, say-than if they have time to think of a response, says Hancock. He found many lies are spontaneous responses to an unexpected demand, such as: "Do you like my dress?"
Hancock hopes his research will help companies work our the best ways for their employees to communicate. For instance, the phone might be the best medium foe sales where employees are encouraged to stretch the truth. But, given his result, work assessment where honesty is a priority, might be best done using email. | 1528.txt | 1 |
[
"to voice her support for a total ban of landmines",
"to clarify the British government's stand on landmines",
"to investigate the sufferings of landmine victims there",
"to establish her image as a friend of landmine victims"
] | Princess Diana paid a visit to in 1997 _ . | It came as something of a surprise when Diana, Princess of Wales, made a trip to in 1997, to support the Red Cross's campaign for a total ban on all anti-personnel landmines. Within hours of arriving in , television screens around the world were filled with images of her comforting victims injured in explosions caused by landmines. "I knew the statistics", she said. "But putting a face to those figures brought the reality home to me; like when I met Sandra, a 13- year-old girl who had lost her leg, and people like her."
The Princess concluded with a simple message: "We must stop landmines". And she used every opportunity during her visit to repeat this message.
But, back in , her views were not shared by some members of the British government, which refused to support a ban on these weapons. Angry politicians launched an attack on the Princess in the press. They described her as very ill-informed and a loose cannon ."
he Princess responded by brushing aside the criticisms. "This is a distraction we do not need. All I'm trying to do is help."
Opposition parties, the media and the public immediately voiced their support for the Princess. To make matters worse for the government, it soon emerged that the Princess's trip had been approved by the Foreign Office, and that she was in fact very well-informed about both the situation in and the British government's policy regarding landmines. The result was a severe embarrassment for the government.
To try and limit the damage, the Foreign Secretary, Malcolm Rifkidnd, claimed that the Princess's views on landmines were not very different from government policy, and that it was working towards a worldwide ban. The Defense Secretary, Michael Portillo, claimed the matter was a misinterpretation or misunderstanding.
For the Princess, the trip to this war-torn country was an excellent opportunity to use her popularity to show the world how much destruction and suffering landmines can cause. She said that the experience had also given her the chance to get closer to people and their problems. | 652.txt | 0 |
[
"She just couldn't bear to meet the landmine victims face to face.",
"The actual situation in made her feel like going back home.",
"Meeting the landmine victims in person made her believe the statistics.",
"Seeing the pain of the victims made her realize the seriousness of the situation."
] | What did Diana mean when she said " ... putting a face to those figures brought the reality home to me (Line 5, Para.1)" ? | It came as something of a surprise when Diana, Princess of Wales, made a trip to in 1997, to support the Red Cross's campaign for a total ban on all anti-personnel landmines. Within hours of arriving in , television screens around the world were filled with images of her comforting victims injured in explosions caused by landmines. "I knew the statistics", she said. "But putting a face to those figures brought the reality home to me; like when I met Sandra, a 13- year-old girl who had lost her leg, and people like her."
The Princess concluded with a simple message: "We must stop landmines". And she used every opportunity during her visit to repeat this message.
But, back in , her views were not shared by some members of the British government, which refused to support a ban on these weapons. Angry politicians launched an attack on the Princess in the press. They described her as very ill-informed and a loose cannon ."
he Princess responded by brushing aside the criticisms. "This is a distraction we do not need. All I'm trying to do is help."
Opposition parties, the media and the public immediately voiced their support for the Princess. To make matters worse for the government, it soon emerged that the Princess's trip had been approved by the Foreign Office, and that she was in fact very well-informed about both the situation in and the British government's policy regarding landmines. The result was a severe embarrassment for the government.
To try and limit the damage, the Foreign Secretary, Malcolm Rifkidnd, claimed that the Princess's views on landmines were not very different from government policy, and that it was working towards a worldwide ban. The Defense Secretary, Michael Portillo, claimed the matter was a misinterpretation or misunderstanding.
For the Princess, the trip to this war-torn country was an excellent opportunity to use her popularity to show the world how much destruction and suffering landmines can cause. She said that the experience had also given her the chance to get closer to people and their problems. | 652.txt | 3 |
[
"she was ill-informed of the government's policy",
"they were actually opposed to banning landmines",
"she had not consulted the government before the visit",
"they believed that she had misinterpreted the situation in"
] | Some members of the British government criticized Diana because _ . | It came as something of a surprise when Diana, Princess of Wales, made a trip to in 1997, to support the Red Cross's campaign for a total ban on all anti-personnel landmines. Within hours of arriving in , television screens around the world were filled with images of her comforting victims injured in explosions caused by landmines. "I knew the statistics", she said. "But putting a face to those figures brought the reality home to me; like when I met Sandra, a 13- year-old girl who had lost her leg, and people like her."
The Princess concluded with a simple message: "We must stop landmines". And she used every opportunity during her visit to repeat this message.
But, back in , her views were not shared by some members of the British government, which refused to support a ban on these weapons. Angry politicians launched an attack on the Princess in the press. They described her as very ill-informed and a loose cannon ."
he Princess responded by brushing aside the criticisms. "This is a distraction we do not need. All I'm trying to do is help."
Opposition parties, the media and the public immediately voiced their support for the Princess. To make matters worse for the government, it soon emerged that the Princess's trip had been approved by the Foreign Office, and that she was in fact very well-informed about both the situation in and the British government's policy regarding landmines. The result was a severe embarrassment for the government.
To try and limit the damage, the Foreign Secretary, Malcolm Rifkidnd, claimed that the Princess's views on landmines were not very different from government policy, and that it was working towards a worldwide ban. The Defense Secretary, Michael Portillo, claimed the matter was a misinterpretation or misunderstanding.
For the Princess, the trip to this war-torn country was an excellent opportunity to use her popularity to show the world how much destruction and suffering landmines can cause. She said that the experience had also given her the chance to get closer to people and their problems. | 652.txt | 1 |
[
"She paid no attention to them.",
"She made more appearances on TV.",
"She met the 13-year-old girl as planned.",
"She rose to argue with her opponents."
] | How did Diana respond to the criticisms? | It came as something of a surprise when Diana, Princess of Wales, made a trip to in 1997, to support the Red Cross's campaign for a total ban on all anti-personnel landmines. Within hours of arriving in , television screens around the world were filled with images of her comforting victims injured in explosions caused by landmines. "I knew the statistics", she said. "But putting a face to those figures brought the reality home to me; like when I met Sandra, a 13- year-old girl who had lost her leg, and people like her."
The Princess concluded with a simple message: "We must stop landmines". And she used every opportunity during her visit to repeat this message.
But, back in , her views were not shared by some members of the British government, which refused to support a ban on these weapons. Angry politicians launched an attack on the Princess in the press. They described her as very ill-informed and a loose cannon ."
he Princess responded by brushing aside the criticisms. "This is a distraction we do not need. All I'm trying to do is help."
Opposition parties, the media and the public immediately voiced their support for the Princess. To make matters worse for the government, it soon emerged that the Princess's trip had been approved by the Foreign Office, and that she was in fact very well-informed about both the situation in and the British government's policy regarding landmines. The result was a severe embarrassment for the government.
To try and limit the damage, the Foreign Secretary, Malcolm Rifkidnd, claimed that the Princess's views on landmines were not very different from government policy, and that it was working towards a worldwide ban. The Defense Secretary, Michael Portillo, claimed the matter was a misinterpretation or misunderstanding.
For the Princess, the trip to this war-torn country was an excellent opportunity to use her popularity to show the world how much destruction and suffering landmines can cause. She said that the experience had also given her the chance to get closer to people and their problems. | 652.txt | 0 |
[
"It had caused embarrassment to the British government.",
"It had brought her closer to the ordinary people.",
"It had greatly promoted her popularity.",
"It had affected her relations with the British government."
] | What did Princess Diana think of her visit to ? | It came as something of a surprise when Diana, Princess of Wales, made a trip to in 1997, to support the Red Cross's campaign for a total ban on all anti-personnel landmines. Within hours of arriving in , television screens around the world were filled with images of her comforting victims injured in explosions caused by landmines. "I knew the statistics", she said. "But putting a face to those figures brought the reality home to me; like when I met Sandra, a 13- year-old girl who had lost her leg, and people like her."
The Princess concluded with a simple message: "We must stop landmines". And she used every opportunity during her visit to repeat this message.
But, back in , her views were not shared by some members of the British government, which refused to support a ban on these weapons. Angry politicians launched an attack on the Princess in the press. They described her as very ill-informed and a loose cannon ."
he Princess responded by brushing aside the criticisms. "This is a distraction we do not need. All I'm trying to do is help."
Opposition parties, the media and the public immediately voiced their support for the Princess. To make matters worse for the government, it soon emerged that the Princess's trip had been approved by the Foreign Office, and that she was in fact very well-informed about both the situation in and the British government's policy regarding landmines. The result was a severe embarrassment for the government.
To try and limit the damage, the Foreign Secretary, Malcolm Rifkidnd, claimed that the Princess's views on landmines were not very different from government policy, and that it was working towards a worldwide ban. The Defense Secretary, Michael Portillo, claimed the matter was a misinterpretation or misunderstanding.
For the Princess, the trip to this war-torn country was an excellent opportunity to use her popularity to show the world how much destruction and suffering landmines can cause. She said that the experience had also given her the chance to get closer to people and their problems. | 652.txt | 1 |
[
"He believed that ladies were born worse preachers that men.",
"He was pleased that ladies could though not as well as men.",
"He disapproved of ladies preaching.",
"He encouraged ladies to preach."
] | What do you suppose the attitude of Dr. Samuel Johnson towards ladies preaching? | As Dr. Samuel Johnson said in a different era about ladies preaching, the surprising thing about computer is not that they think less well than a man, but that they think at all. The early electronic computer did not have much going for it except a marvelous memory and some good math skills. But today the best models can be wired up to learn by experience, follow an argument, ask proper questions and write poetry and write poetry and music. They can also carry on somewhat puzzling conversations.
Computers imitate life. As computer get more complex, the imitation gets better. Finally, the line between the original and the copy becomes unclear. In another 15 years or so, we will the computer as a new form of life.
The opinion seems ridiculous because, for one thing, computers lack the drives and emotions of living creatures. But drives car can be programmed into the computer's brain just as nature programmed them into our human brains as a part of the equipment for survival.
Computers match people in some roles, and when fast decisions are needed in a crisis, they often surpass them. Having evolved when the pace of life was slower, the human brain has an inherent defect that prevents it from absorbing several streams of information simultaneously and acting on them quickly. Throw too many things at the brain one time and it freezes up.
We are still control, but the capabilities of computer are increasing at a fantastic rate, while raw human intelligence is changing slowly, if as all. Computer power has increased ten times every eight years since 1946. In the 1990s, when the sixth generation appears, the reasoning power of an intelligence built out of silicon will begin to match that of the human brain.
That does not mean the evolution of intelligence has ended on the earth. Judging by the he past, we can expect that a new species will arise out of man, surpassing his achievements those of his predecessor. Only a carbon chemistry enthusiast would assume that the new species must be man's flesh-and-blood descendants. The new kind of intelligent life is more I likely to be made of silicon. | 2568.txt | 0 |
[
"decision making",
"drives and feelings",
"growth of reasoning power",
"information absorption"
] | Today, computer are still inferior to man in terms of ________. | As Dr. Samuel Johnson said in a different era about ladies preaching, the surprising thing about computer is not that they think less well than a man, but that they think at all. The early electronic computer did not have much going for it except a marvelous memory and some good math skills. But today the best models can be wired up to learn by experience, follow an argument, ask proper questions and write poetry and write poetry and music. They can also carry on somewhat puzzling conversations.
Computers imitate life. As computer get more complex, the imitation gets better. Finally, the line between the original and the copy becomes unclear. In another 15 years or so, we will the computer as a new form of life.
The opinion seems ridiculous because, for one thing, computers lack the drives and emotions of living creatures. But drives car can be programmed into the computer's brain just as nature programmed them into our human brains as a part of the equipment for survival.
Computers match people in some roles, and when fast decisions are needed in a crisis, they often surpass them. Having evolved when the pace of life was slower, the human brain has an inherent defect that prevents it from absorbing several streams of information simultaneously and acting on them quickly. Throw too many things at the brain one time and it freezes up.
We are still control, but the capabilities of computer are increasing at a fantastic rate, while raw human intelligence is changing slowly, if as all. Computer power has increased ten times every eight years since 1946. In the 1990s, when the sixth generation appears, the reasoning power of an intelligence built out of silicon will begin to match that of the human brain.
That does not mean the evolution of intelligence has ended on the earth. Judging by the he past, we can expect that a new species will arise out of man, surpassing his achievements those of his predecessor. Only a carbon chemistry enthusiast would assume that the new species must be man's flesh-and-blood descendants. The new kind of intelligent life is more I likely to be made of silicon. | 2568.txt | 1 |
[
"in the long process of evolution slow pace of life didn't require such ability of the computer because brain",
"the human brain is influenced by other factors such as motivation and emotion",
"the human brain may sometimes freeze up in a dangerous situation",
"the evolution of imitate life while the human brain docs not imitate computers"
] | In terms of making quick decisions, the human brain cannot be compared with the computer because ________. | As Dr. Samuel Johnson said in a different era about ladies preaching, the surprising thing about computer is not that they think less well than a man, but that they think at all. The early electronic computer did not have much going for it except a marvelous memory and some good math skills. But today the best models can be wired up to learn by experience, follow an argument, ask proper questions and write poetry and write poetry and music. They can also carry on somewhat puzzling conversations.
Computers imitate life. As computer get more complex, the imitation gets better. Finally, the line between the original and the copy becomes unclear. In another 15 years or so, we will the computer as a new form of life.
The opinion seems ridiculous because, for one thing, computers lack the drives and emotions of living creatures. But drives car can be programmed into the computer's brain just as nature programmed them into our human brains as a part of the equipment for survival.
Computers match people in some roles, and when fast decisions are needed in a crisis, they often surpass them. Having evolved when the pace of life was slower, the human brain has an inherent defect that prevents it from absorbing several streams of information simultaneously and acting on them quickly. Throw too many things at the brain one time and it freezes up.
We are still control, but the capabilities of computer are increasing at a fantastic rate, while raw human intelligence is changing slowly, if as all. Computer power has increased ten times every eight years since 1946. In the 1990s, when the sixth generation appears, the reasoning power of an intelligence built out of silicon will begin to match that of the human brain.
That does not mean the evolution of intelligence has ended on the earth. Judging by the he past, we can expect that a new species will arise out of man, surpassing his achievements those of his predecessor. Only a carbon chemistry enthusiast would assume that the new species must be man's flesh-and-blood descendants. The new kind of intelligent life is more I likely to be made of silicon. | 2568.txt | 2 |
[
"computers are likely to become a new form of intelligent life",
"human beings have lost control of computers",
"the intelligence of computers will eventually surpass will that of human beings",
"the evolution of intelligence will probably depend on that of electronic brains"
] | Though he think highly of the development of computer science, the author doesn't mean that ________. | As Dr. Samuel Johnson said in a different era about ladies preaching, the surprising thing about computer is not that they think less well than a man, but that they think at all. The early electronic computer did not have much going for it except a marvelous memory and some good math skills. But today the best models can be wired up to learn by experience, follow an argument, ask proper questions and write poetry and write poetry and music. They can also carry on somewhat puzzling conversations.
Computers imitate life. As computer get more complex, the imitation gets better. Finally, the line between the original and the copy becomes unclear. In another 15 years or so, we will the computer as a new form of life.
The opinion seems ridiculous because, for one thing, computers lack the drives and emotions of living creatures. But drives car can be programmed into the computer's brain just as nature programmed them into our human brains as a part of the equipment for survival.
Computers match people in some roles, and when fast decisions are needed in a crisis, they often surpass them. Having evolved when the pace of life was slower, the human brain has an inherent defect that prevents it from absorbing several streams of information simultaneously and acting on them quickly. Throw too many things at the brain one time and it freezes up.
We are still control, but the capabilities of computer are increasing at a fantastic rate, while raw human intelligence is changing slowly, if as all. Computer power has increased ten times every eight years since 1946. In the 1990s, when the sixth generation appears, the reasoning power of an intelligence built out of silicon will begin to match that of the human brain.
That does not mean the evolution of intelligence has ended on the earth. Judging by the he past, we can expect that a new species will arise out of man, surpassing his achievements those of his predecessor. Only a carbon chemistry enthusiast would assume that the new species must be man's flesh-and-blood descendants. The new kind of intelligent life is more I likely to be made of silicon. | 2568.txt | 1 |
[
"Future man will be made of silicon instead of flesh and blood.",
"Some day it will be difficult to tell a computer from a man.",
"The reasoning power of computers has already surpassed that of man.",
"Future intelligent life may not necessarily be made of organic matter."
] | According to the passage, which of the following statements is TRUE? | As Dr. Samuel Johnson said in a different era about ladies preaching, the surprising thing about computer is not that they think less well than a man, but that they think at all. The early electronic computer did not have much going for it except a marvelous memory and some good math skills. But today the best models can be wired up to learn by experience, follow an argument, ask proper questions and write poetry and write poetry and music. They can also carry on somewhat puzzling conversations.
Computers imitate life. As computer get more complex, the imitation gets better. Finally, the line between the original and the copy becomes unclear. In another 15 years or so, we will the computer as a new form of life.
The opinion seems ridiculous because, for one thing, computers lack the drives and emotions of living creatures. But drives car can be programmed into the computer's brain just as nature programmed them into our human brains as a part of the equipment for survival.
Computers match people in some roles, and when fast decisions are needed in a crisis, they often surpass them. Having evolved when the pace of life was slower, the human brain has an inherent defect that prevents it from absorbing several streams of information simultaneously and acting on them quickly. Throw too many things at the brain one time and it freezes up.
We are still control, but the capabilities of computer are increasing at a fantastic rate, while raw human intelligence is changing slowly, if as all. Computer power has increased ten times every eight years since 1946. In the 1990s, when the sixth generation appears, the reasoning power of an intelligence built out of silicon will begin to match that of the human brain.
That does not mean the evolution of intelligence has ended on the earth. Judging by the he past, we can expect that a new species will arise out of man, surpassing his achievements those of his predecessor. Only a carbon chemistry enthusiast would assume that the new species must be man's flesh-and-blood descendants. The new kind of intelligent life is more I likely to be made of silicon. | 2568.txt | 3 |
[
"Man appears indifferent to what happens in nature.",
"Man acts as if he does not belong to nature.",
"Man can avoid the effects of environmental pollution.",
"Man can escape his responsibilities for environmental effects of pesticides"
] | Which of the following is closest in meaning to the sentence "Man…is part of nature" (Para. 1, Lines 3-4)? | Where do pesticides fit into the picture of environmental disease? We have seen that they now pollute soil,water and food, that they have the power to make our streams fishless and our gardens and woodlands silent and birdless. Man, however much he may like to pretend the contrary, is part of nature. Can he escape a pollution that is now so thoroughly distributed throughout our world:
We know that even single exposures to these chemicals, if the amount is large enough, can cause extremely severe poisoning. But this is not the major problem. The sudden illness or death of farmers, farmworkers, and others exposed to sufficient quantities of pesticides is very sad and should not occur. For the population as a whole, we must be more concerned with the delayed effects of absorbing small amounts of the pesticides that invisibly pollute our world.
Responsible public health officials have pointed out that the biological effects of chemicals are cumulative over long periods of time, and that the danger to individual may depend on the sum of the exposures received throughout his lifetime. For these very reasons the danger is easily ignored. It is human nature to shake off what may seem to us a threat of future disaster. "Men are naturally most impressed by diseases which have obvious signs, " says a wise physician, Dr Rene Dubos, "yet some of their worst enemies slowly approach them unnoticed." | 341.txt | 1 |
[
"Pessimistic",
"Indifferent",
"Defensive",
"Concerned"
] | What is the author"s attitude toward the environmental effects of pesticides? | Where do pesticides fit into the picture of environmental disease? We have seen that they now pollute soil,water and food, that they have the power to make our streams fishless and our gardens and woodlands silent and birdless. Man, however much he may like to pretend the contrary, is part of nature. Can he escape a pollution that is now so thoroughly distributed throughout our world:
We know that even single exposures to these chemicals, if the amount is large enough, can cause extremely severe poisoning. But this is not the major problem. The sudden illness or death of farmers, farmworkers, and others exposed to sufficient quantities of pesticides is very sad and should not occur. For the population as a whole, we must be more concerned with the delayed effects of absorbing small amounts of the pesticides that invisibly pollute our world.
Responsible public health officials have pointed out that the biological effects of chemicals are cumulative over long periods of time, and that the danger to individual may depend on the sum of the exposures received throughout his lifetime. For these very reasons the danger is easily ignored. It is human nature to shake off what may seem to us a threat of future disaster. "Men are naturally most impressed by diseases which have obvious signs, " says a wise physician, Dr Rene Dubos, "yet some of their worst enemies slowly approach them unnoticed." | 341.txt | 3 |
[
"is not the worst of the negative consequences resulting from the use of pesticides",
"now occurs most frequently among all accidental deaths",
"has sharply increased so as to become the center of public attention",
"is unavoidable because people can\"t do without pesticides in farming"
] | In the author"s view, the sudden death caused by exposure to large amounts of pesticides _ . | Where do pesticides fit into the picture of environmental disease? We have seen that they now pollute soil,water and food, that they have the power to make our streams fishless and our gardens and woodlands silent and birdless. Man, however much he may like to pretend the contrary, is part of nature. Can he escape a pollution that is now so thoroughly distributed throughout our world:
We know that even single exposures to these chemicals, if the amount is large enough, can cause extremely severe poisoning. But this is not the major problem. The sudden illness or death of farmers, farmworkers, and others exposed to sufficient quantities of pesticides is very sad and should not occur. For the population as a whole, we must be more concerned with the delayed effects of absorbing small amounts of the pesticides that invisibly pollute our world.
Responsible public health officials have pointed out that the biological effects of chemicals are cumulative over long periods of time, and that the danger to individual may depend on the sum of the exposures received throughout his lifetime. For these very reasons the danger is easily ignored. It is human nature to shake off what may seem to us a threat of future disaster. "Men are naturally most impressed by diseases which have obvious signs, " says a wise physician, Dr Rene Dubos, "yet some of their worst enemies slowly approach them unnoticed." | 341.txt | 0 |
[
"limited exposure to them does little harm to people\"s health",
"the present is more important for them than the future",
"the danger does not become apparent immediately",
"humans are capable of withstanding small amounts of poisoning"
] | People tend to ignore the delayed effects of exposure to chemical because _ . | Where do pesticides fit into the picture of environmental disease? We have seen that they now pollute soil,water and food, that they have the power to make our streams fishless and our gardens and woodlands silent and birdless. Man, however much he may like to pretend the contrary, is part of nature. Can he escape a pollution that is now so thoroughly distributed throughout our world:
We know that even single exposures to these chemicals, if the amount is large enough, can cause extremely severe poisoning. But this is not the major problem. The sudden illness or death of farmers, farmworkers, and others exposed to sufficient quantities of pesticides is very sad and should not occur. For the population as a whole, we must be more concerned with the delayed effects of absorbing small amounts of the pesticides that invisibly pollute our world.
Responsible public health officials have pointed out that the biological effects of chemicals are cumulative over long periods of time, and that the danger to individual may depend on the sum of the exposures received throughout his lifetime. For these very reasons the danger is easily ignored. It is human nature to shake off what may seem to us a threat of future disaster. "Men are naturally most impressed by diseases which have obvious signs, " says a wise physician, Dr Rene Dubos, "yet some of their worst enemies slowly approach them unnoticed." | 341.txt | 2 |
[
"people find invisible diseases difficult to deal with",
"attacks by hidden enemies tend to be fatal",
"diseases with obvious signs are easy to cure",
"people tend to overlook hidden dangers caused by pesticides"
] | It can be concluded from Dr. Dubos remarks that _ . | Where do pesticides fit into the picture of environmental disease? We have seen that they now pollute soil,water and food, that they have the power to make our streams fishless and our gardens and woodlands silent and birdless. Man, however much he may like to pretend the contrary, is part of nature. Can he escape a pollution that is now so thoroughly distributed throughout our world:
We know that even single exposures to these chemicals, if the amount is large enough, can cause extremely severe poisoning. But this is not the major problem. The sudden illness or death of farmers, farmworkers, and others exposed to sufficient quantities of pesticides is very sad and should not occur. For the population as a whole, we must be more concerned with the delayed effects of absorbing small amounts of the pesticides that invisibly pollute our world.
Responsible public health officials have pointed out that the biological effects of chemicals are cumulative over long periods of time, and that the danger to individual may depend on the sum of the exposures received throughout his lifetime. For these very reasons the danger is easily ignored. It is human nature to shake off what may seem to us a threat of future disaster. "Men are naturally most impressed by diseases which have obvious signs, " says a wise physician, Dr Rene Dubos, "yet some of their worst enemies slowly approach them unnoticed." | 341.txt | 3 |
[
"sight.",
"sake.",
"success.",
"place."
] | The word "location" in paragraph 1 is closest in meaning to | Sometime after midnight on February 8,1969, a large, bright meteor entered Earth's atmosphere and broke into thousands of pieces, plummeted to the ground, and scattered over an area 50 miles long and 10 miles wide in the state of Chihuahua in Mexico. The first meteorite from this fall was found in the village of Pueblito de Allende. Altogether, roughly two tons of meteorite fragments were recovered, all of which bear the name Allende for the location of the first discovery.
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere. When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula-the interstellar cloud of gas and dust out of which our solar system was formed.
The Allende meteorite is classified as a chondrite. Chondrites take their name from the Greek word chondros-meaning "seed"-an allusion to their appearance as rocks containing tiny seeds. These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal. A few chondrules contain grains that survived the melting event, so these enigmatic chondrules must have formed when compact masses of nebular dust were fused at high temperatures-approaching 1,700 degrees Celsius-and then cooled before these surviving grains could melt. Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized. It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast. Chondrules must have been melted in small pockets of the nebula that were able to lose heat rapidly. The origin of these peculiar glassy spheres remains an enigma.
Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules. They are composed of minerals uncommon on Earth, all rich in calcium, aluminum, and titanium, the most refractory (resistant to melting) of the major elements in the nebula. The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula. However, studies of the textures of inclusions reveal that the order in which the minerals appeared in the inclusions varies from inclusion to inclusion, and often does not match the theoretical condensation sequence for those metals.
Chondrules and inclusions in Allende are held together by the chondrite matrix, a mixture of fine-grained, mostly silicate minerals that also includes grains of iron metal and iron sulfide. At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although minute amounts of surviving interstellar dust are mixed with the processed materials.
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun. To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms. After all,the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable. The compositional similarity is striking. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of distilled Sun, a sort of solar sludge from which only gases have been removed. Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. | 368.txt | 3 |
[
"It was almost ten miles wide.",
"It was the biggest meteor ever to hit Mexico.",
"It weighed more than two tons.",
"It broke into more pieces than most meteors do."
] | Which of the following can be inferred from paragraph 1 about the large meteor that entered Earths atmosphere on February 8, 1969? | Sometime after midnight on February 8,1969, a large, bright meteor entered Earth's atmosphere and broke into thousands of pieces, plummeted to the ground, and scattered over an area 50 miles long and 10 miles wide in the state of Chihuahua in Mexico. The first meteorite from this fall was found in the village of Pueblito de Allende. Altogether, roughly two tons of meteorite fragments were recovered, all of which bear the name Allende for the location of the first discovery.
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere. When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula-the interstellar cloud of gas and dust out of which our solar system was formed.
The Allende meteorite is classified as a chondrite. Chondrites take their name from the Greek word chondros-meaning "seed"-an allusion to their appearance as rocks containing tiny seeds. These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal. A few chondrules contain grains that survived the melting event, so these enigmatic chondrules must have formed when compact masses of nebular dust were fused at high temperatures-approaching 1,700 degrees Celsius-and then cooled before these surviving grains could melt. Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized. It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast. Chondrules must have been melted in small pockets of the nebula that were able to lose heat rapidly. The origin of these peculiar glassy spheres remains an enigma.
Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules. They are composed of minerals uncommon on Earth, all rich in calcium, aluminum, and titanium, the most refractory (resistant to melting) of the major elements in the nebula. The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula. However, studies of the textures of inclusions reveal that the order in which the minerals appeared in the inclusions varies from inclusion to inclusion, and often does not match the theoretical condensation sequence for those metals.
Chondrules and inclusions in Allende are held together by the chondrite matrix, a mixture of fine-grained, mostly silicate minerals that also includes grains of iron metal and iron sulfide. At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although minute amounts of surviving interstellar dust are mixed with the processed materials.
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun. To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms. After all,the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable. The compositional similarity is striking. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of distilled Sun, a sort of solar sludge from which only gases have been removed. Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. | 368.txt | 2 |
[
"addition.",
"modification.",
"resemblance.",
"reference."
] | The word "allusion" in paragraph 3 is closest in meaning to | Sometime after midnight on February 8,1969, a large, bright meteor entered Earth's atmosphere and broke into thousands of pieces, plummeted to the ground, and scattered over an area 50 miles long and 10 miles wide in the state of Chihuahua in Mexico. The first meteorite from this fall was found in the village of Pueblito de Allende. Altogether, roughly two tons of meteorite fragments were recovered, all of which bear the name Allende for the location of the first discovery.
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere. When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula-the interstellar cloud of gas and dust out of which our solar system was formed.
The Allende meteorite is classified as a chondrite. Chondrites take their name from the Greek word chondros-meaning "seed"-an allusion to their appearance as rocks containing tiny seeds. These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal. A few chondrules contain grains that survived the melting event, so these enigmatic chondrules must have formed when compact masses of nebular dust were fused at high temperatures-approaching 1,700 degrees Celsius-and then cooled before these surviving grains could melt. Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized. It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast. Chondrules must have been melted in small pockets of the nebula that were able to lose heat rapidly. The origin of these peculiar glassy spheres remains an enigma.
Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules. They are composed of minerals uncommon on Earth, all rich in calcium, aluminum, and titanium, the most refractory (resistant to melting) of the major elements in the nebula. The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula. However, studies of the textures of inclusions reveal that the order in which the minerals appeared in the inclusions varies from inclusion to inclusion, and often does not match the theoretical condensation sequence for those metals.
Chondrules and inclusions in Allende are held together by the chondrite matrix, a mixture of fine-grained, mostly silicate minerals that also includes grains of iron metal and iron sulfide. At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although minute amounts of surviving interstellar dust are mixed with the processed materials.
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun. To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms. After all,the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable. The compositional similarity is striking. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of distilled Sun, a sort of solar sludge from which only gases have been removed. Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. | 368.txt | 3 |
[
"dangerous.",
"mysterious.",
"interesting.",
"surprising."
] | The word "enigmatic" in paragraph 3 is closest in meaning to | Sometime after midnight on February 8,1969, a large, bright meteor entered Earth's atmosphere and broke into thousands of pieces, plummeted to the ground, and scattered over an area 50 miles long and 10 miles wide in the state of Chihuahua in Mexico. The first meteorite from this fall was found in the village of Pueblito de Allende. Altogether, roughly two tons of meteorite fragments were recovered, all of which bear the name Allende for the location of the first discovery.
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere. When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula-the interstellar cloud of gas and dust out of which our solar system was formed.
The Allende meteorite is classified as a chondrite. Chondrites take their name from the Greek word chondros-meaning "seed"-an allusion to their appearance as rocks containing tiny seeds. These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal. A few chondrules contain grains that survived the melting event, so these enigmatic chondrules must have formed when compact masses of nebular dust were fused at high temperatures-approaching 1,700 degrees Celsius-and then cooled before these surviving grains could melt. Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized. It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast. Chondrules must have been melted in small pockets of the nebula that were able to lose heat rapidly. The origin of these peculiar glassy spheres remains an enigma.
Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules. They are composed of minerals uncommon on Earth, all rich in calcium, aluminum, and titanium, the most refractory (resistant to melting) of the major elements in the nebula. The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula. However, studies of the textures of inclusions reveal that the order in which the minerals appeared in the inclusions varies from inclusion to inclusion, and often does not match the theoretical condensation sequence for those metals.
Chondrules and inclusions in Allende are held together by the chondrite matrix, a mixture of fine-grained, mostly silicate minerals that also includes grains of iron metal and iron sulfide. At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although minute amounts of surviving interstellar dust are mixed with the processed materials.
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun. To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms. After all,the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable. The compositional similarity is striking. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of distilled Sun, a sort of solar sludge from which only gases have been removed. Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. | 368.txt | 1 |
[
"The chondrules were formed of silicate material.",
"The chondrules were formed at high temperatures and then cooled rapidly.",
"The grains were formed in huge areas of the solar nebula",
"The grains were formed after the chondrules were fused together into chondrites."
] | According to paragraph 3, what does the presence of grains inside some of the chondrules indicate? | Sometime after midnight on February 8,1969, a large, bright meteor entered Earth's atmosphere and broke into thousands of pieces, plummeted to the ground, and scattered over an area 50 miles long and 10 miles wide in the state of Chihuahua in Mexico. The first meteorite from this fall was found in the village of Pueblito de Allende. Altogether, roughly two tons of meteorite fragments were recovered, all of which bear the name Allende for the location of the first discovery.
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere. When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula-the interstellar cloud of gas and dust out of which our solar system was formed.
The Allende meteorite is classified as a chondrite. Chondrites take their name from the Greek word chondros-meaning "seed"-an allusion to their appearance as rocks containing tiny seeds. These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal. A few chondrules contain grains that survived the melting event, so these enigmatic chondrules must have formed when compact masses of nebular dust were fused at high temperatures-approaching 1,700 degrees Celsius-and then cooled before these surviving grains could melt. Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized. It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast. Chondrules must have been melted in small pockets of the nebula that were able to lose heat rapidly. The origin of these peculiar glassy spheres remains an enigma.
Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules. They are composed of minerals uncommon on Earth, all rich in calcium, aluminum, and titanium, the most refractory (resistant to melting) of the major elements in the nebula. The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula. However, studies of the textures of inclusions reveal that the order in which the minerals appeared in the inclusions varies from inclusion to inclusion, and often does not match the theoretical condensation sequence for those metals.
Chondrules and inclusions in Allende are held together by the chondrite matrix, a mixture of fine-grained, mostly silicate minerals that also includes grains of iron metal and iron sulfide. At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although minute amounts of surviving interstellar dust are mixed with the processed materials.
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun. To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms. After all,the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable. The compositional similarity is striking. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of distilled Sun, a sort of solar sludge from which only gases have been removed. Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. | 368.txt | 1 |
[
"These minerals are among the most resistant to melting of all the major elements in the solar nebula.",
"These minerals are believed to be some of the first elements to have condensed out of the solar nebula.",
"These minerals are among the least commonly found elements on Earth.",
"These elements occur in the order that scientists would have predicted."
] | According to paragraph 4, all of the following are true about the minerals found in the refractory inclusions EXCEPT: | Sometime after midnight on February 8,1969, a large, bright meteor entered Earth's atmosphere and broke into thousands of pieces, plummeted to the ground, and scattered over an area 50 miles long and 10 miles wide in the state of Chihuahua in Mexico. The first meteorite from this fall was found in the village of Pueblito de Allende. Altogether, roughly two tons of meteorite fragments were recovered, all of which bear the name Allende for the location of the first discovery.
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere. When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula-the interstellar cloud of gas and dust out of which our solar system was formed.
The Allende meteorite is classified as a chondrite. Chondrites take their name from the Greek word chondros-meaning "seed"-an allusion to their appearance as rocks containing tiny seeds. These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal. A few chondrules contain grains that survived the melting event, so these enigmatic chondrules must have formed when compact masses of nebular dust were fused at high temperatures-approaching 1,700 degrees Celsius-and then cooled before these surviving grains could melt. Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized. It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast. Chondrules must have been melted in small pockets of the nebula that were able to lose heat rapidly. The origin of these peculiar glassy spheres remains an enigma.
Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules. They are composed of minerals uncommon on Earth, all rich in calcium, aluminum, and titanium, the most refractory (resistant to melting) of the major elements in the nebula. The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula. However, studies of the textures of inclusions reveal that the order in which the minerals appeared in the inclusions varies from inclusion to inclusion, and often does not match the theoretical condensation sequence for those metals.
Chondrules and inclusions in Allende are held together by the chondrite matrix, a mixture of fine-grained, mostly silicate minerals that also includes grains of iron metal and iron sulfide. At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although minute amounts of surviving interstellar dust are mixed with the processed materials.
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun. To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms. After all,the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable. The compositional similarity is striking. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of distilled Sun, a sort of solar sludge from which only gases have been removed. Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. | 368.txt | 3 |
[
"pure.",
"solid.",
"ordinary.",
"trapped."
] | The word "pristine" in paragraph 5 is closest in meaning to | Sometime after midnight on February 8,1969, a large, bright meteor entered Earth's atmosphere and broke into thousands of pieces, plummeted to the ground, and scattered over an area 50 miles long and 10 miles wide in the state of Chihuahua in Mexico. The first meteorite from this fall was found in the village of Pueblito de Allende. Altogether, roughly two tons of meteorite fragments were recovered, all of which bear the name Allende for the location of the first discovery.
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere. When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula-the interstellar cloud of gas and dust out of which our solar system was formed.
The Allende meteorite is classified as a chondrite. Chondrites take their name from the Greek word chondros-meaning "seed"-an allusion to their appearance as rocks containing tiny seeds. These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal. A few chondrules contain grains that survived the melting event, so these enigmatic chondrules must have formed when compact masses of nebular dust were fused at high temperatures-approaching 1,700 degrees Celsius-and then cooled before these surviving grains could melt. Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized. It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast. Chondrules must have been melted in small pockets of the nebula that were able to lose heat rapidly. The origin of these peculiar glassy spheres remains an enigma.
Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules. They are composed of minerals uncommon on Earth, all rich in calcium, aluminum, and titanium, the most refractory (resistant to melting) of the major elements in the nebula. The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula. However, studies of the textures of inclusions reveal that the order in which the minerals appeared in the inclusions varies from inclusion to inclusion, and often does not match the theoretical condensation sequence for those metals.
Chondrules and inclusions in Allende are held together by the chondrite matrix, a mixture of fine-grained, mostly silicate minerals that also includes grains of iron metal and iron sulfide. At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although minute amounts of surviving interstellar dust are mixed with the processed materials.
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun. To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms. After all,the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable. The compositional similarity is striking. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of distilled Sun, a sort of solar sludge from which only gases have been removed. Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. | 368.txt | 0 |
[
"Large amounts of this material were formed by condensation or melting in the nebula.",
"This material contains more iron and iron sulfide than had previously been thought.",
"This material is very similar to the material from which the refractory inclusions are made.",
"The grains in this material are made from the same elements as chondrules are."
] | According to paragraph 5, which of the following is indicated by studies of the mixture holding the inclusions together? | Sometime after midnight on February 8,1969, a large, bright meteor entered Earth's atmosphere and broke into thousands of pieces, plummeted to the ground, and scattered over an area 50 miles long and 10 miles wide in the state of Chihuahua in Mexico. The first meteorite from this fall was found in the village of Pueblito de Allende. Altogether, roughly two tons of meteorite fragments were recovered, all of which bear the name Allende for the location of the first discovery.
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere. When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula-the interstellar cloud of gas and dust out of which our solar system was formed.
The Allende meteorite is classified as a chondrite. Chondrites take their name from the Greek word chondros-meaning "seed"-an allusion to their appearance as rocks containing tiny seeds. These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal. A few chondrules contain grains that survived the melting event, so these enigmatic chondrules must have formed when compact masses of nebular dust were fused at high temperatures-approaching 1,700 degrees Celsius-and then cooled before these surviving grains could melt. Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized. It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast. Chondrules must have been melted in small pockets of the nebula that were able to lose heat rapidly. The origin of these peculiar glassy spheres remains an enigma.
Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules. They are composed of minerals uncommon on Earth, all rich in calcium, aluminum, and titanium, the most refractory (resistant to melting) of the major elements in the nebula. The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula. However, studies of the textures of inclusions reveal that the order in which the minerals appeared in the inclusions varies from inclusion to inclusion, and often does not match the theoretical condensation sequence for those metals.
Chondrules and inclusions in Allende are held together by the chondrite matrix, a mixture of fine-grained, mostly silicate minerals that also includes grains of iron metal and iron sulfide. At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although minute amounts of surviving interstellar dust are mixed with the processed materials.
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun. To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms. After all,the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable. The compositional similarity is striking. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of distilled Sun, a sort of solar sludge from which only gases have been removed. Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. | 368.txt | 0 |
[
"To show how difficult it is to compare the composition of a meteorite with that of the Sun.",
"To explain why a comparison of the compositions of a meteorite and of the Sun has to be done in terms of ratios of elements.",
"To identify the most common element in both the Sun and meteorite specimens.",
"To emphasize how much largerthe Sun is than any meteorite specimen is."
] | In paragraph 6, why does the author mention that "the Sun has many more atoms of any element, say iron, than does a meteorite specimen"? | Sometime after midnight on February 8,1969, a large, bright meteor entered Earth's atmosphere and broke into thousands of pieces, plummeted to the ground, and scattered over an area 50 miles long and 10 miles wide in the state of Chihuahua in Mexico. The first meteorite from this fall was found in the village of Pueblito de Allende. Altogether, roughly two tons of meteorite fragments were recovered, all of which bear the name Allende for the location of the first discovery.
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere. When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula-the interstellar cloud of gas and dust out of which our solar system was formed.
The Allende meteorite is classified as a chondrite. Chondrites take their name from the Greek word chondros-meaning "seed"-an allusion to their appearance as rocks containing tiny seeds. These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal. A few chondrules contain grains that survived the melting event, so these enigmatic chondrules must have formed when compact masses of nebular dust were fused at high temperatures-approaching 1,700 degrees Celsius-and then cooled before these surviving grains could melt. Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized. It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast. Chondrules must have been melted in small pockets of the nebula that were able to lose heat rapidly. The origin of these peculiar glassy spheres remains an enigma.
Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules. They are composed of minerals uncommon on Earth, all rich in calcium, aluminum, and titanium, the most refractory (resistant to melting) of the major elements in the nebula. The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula. However, studies of the textures of inclusions reveal that the order in which the minerals appeared in the inclusions varies from inclusion to inclusion, and often does not match the theoretical condensation sequence for those metals.
Chondrules and inclusions in Allende are held together by the chondrite matrix, a mixture of fine-grained, mostly silicate minerals that also includes grains of iron metal and iron sulfide. At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although minute amounts of surviving interstellar dust are mixed with the processed materials.
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun. To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms. After all,the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable. The compositional similarity is striking. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of distilled Sun, a sort of solar sludge from which only gases have been removed. Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. | 368.txt | 1 |
[
"containing nebular matter.",
"containing many fewer atoms of iron.",
"the relative amount of volatile elements.",
"the ratio of iron to silicon."
] | According to paragraph 6, the composition of chondritic meteorites differs from the composition of the Sun primarily in | Sometime after midnight on February 8,1969, a large, bright meteor entered Earth's atmosphere and broke into thousands of pieces, plummeted to the ground, and scattered over an area 50 miles long and 10 miles wide in the state of Chihuahua in Mexico. The first meteorite from this fall was found in the village of Pueblito de Allende. Altogether, roughly two tons of meteorite fragments were recovered, all of which bear the name Allende for the location of the first discovery.
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere. When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula-the interstellar cloud of gas and dust out of which our solar system was formed.
The Allende meteorite is classified as a chondrite. Chondrites take their name from the Greek word chondros-meaning "seed"-an allusion to their appearance as rocks containing tiny seeds. These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal. A few chondrules contain grains that survived the melting event, so these enigmatic chondrules must have formed when compact masses of nebular dust were fused at high temperatures-approaching 1,700 degrees Celsius-and then cooled before these surviving grains could melt. Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized. It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast. Chondrules must have been melted in small pockets of the nebula that were able to lose heat rapidly. The origin of these peculiar glassy spheres remains an enigma.
Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules. They are composed of minerals uncommon on Earth, all rich in calcium, aluminum, and titanium, the most refractory (resistant to melting) of the major elements in the nebula. The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula. However, studies of the textures of inclusions reveal that the order in which the minerals appeared in the inclusions varies from inclusion to inclusion, and often does not match the theoretical condensation sequence for those metals.
Chondrules and inclusions in Allende are held together by the chondrite matrix, a mixture of fine-grained, mostly silicate minerals that also includes grains of iron metal and iron sulfide. At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although minute amounts of surviving interstellar dust are mixed with the processed materials.
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun. To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms. After all,the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable. The compositional similarity is striking. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of distilled Sun, a sort of solar sludge from which only gases have been removed. Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. | 368.txt | 2 |
[
"It indicates what the matter from which planets were formed was probably like.",
"It may explain howthe Sun originally developed.",
"It helps scientists estimate the variations in the chemical composition of different meteors.",
"It suggests that most meteorites may contain large quantities of volatile elements."
] | According to paragraph 6, what is the significance of the similarity in composition between chondrites and the Sun? | Sometime after midnight on February 8,1969, a large, bright meteor entered Earth's atmosphere and broke into thousands of pieces, plummeted to the ground, and scattered over an area 50 miles long and 10 miles wide in the state of Chihuahua in Mexico. The first meteorite from this fall was found in the village of Pueblito de Allende. Altogether, roughly two tons of meteorite fragments were recovered, all of which bear the name Allende for the location of the first discovery.
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere. When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula-the interstellar cloud of gas and dust out of which our solar system was formed.
The Allende meteorite is classified as a chondrite. Chondrites take their name from the Greek word chondros-meaning "seed"-an allusion to their appearance as rocks containing tiny seeds. These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal. A few chondrules contain grains that survived the melting event, so these enigmatic chondrules must have formed when compact masses of nebular dust were fused at high temperatures-approaching 1,700 degrees Celsius-and then cooled before these surviving grains could melt. Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized. It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast. Chondrules must have been melted in small pockets of the nebula that were able to lose heat rapidly. The origin of these peculiar glassy spheres remains an enigma.
Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules. They are composed of minerals uncommon on Earth, all rich in calcium, aluminum, and titanium, the most refractory (resistant to melting) of the major elements in the nebula. The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula. However, studies of the textures of inclusions reveal that the order in which the minerals appeared in the inclusions varies from inclusion to inclusion, and often does not match the theoretical condensation sequence for those metals.
Chondrules and inclusions in Allende are held together by the chondrite matrix, a mixture of fine-grained, mostly silicate minerals that also includes grains of iron metal and iron sulfide. At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although minute amounts of surviving interstellar dust are mixed with the processed materials.
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun. To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms. After all,the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable. The compositional similarity is striking. The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of distilled Sun, a sort of solar sludge from which only gases have been removed. Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. | 368.txt | 0 |
[
"that guarantees students of different races to be admitted equally",
"American citizens fight against because it discriminates minority students",
"colleges take to give preference to minority students in college admission",
"favored by American colleges yet unpopular with American public"
] | Affirmative action is something _ . | As students primp and preen to wow their favorite colleges, there's one characteristic they can't control： their race. That's one reason voters, courts and politicians in six states have outlawed racial preferences in college admissions, while other colleges, fearful of lawsuits, play down their affirmative-action efforts these days. But make no mistake： race still matters. How much depends on the school and the state.
In Texas, public universities have managed to counteract the effect of racial-preference bans by automatically admitting the top 10% of the graduating class of every high school, including those schools where most students are minorities. But Rice University in Houston, private and highly selective, has had to reinvent its admissions strategies to maintain the school's minority enrollment. Each February, 80 to 90 black, Hispanic and Native American kids visit Rice on an expenses-paid trip. Rice urges counselors from high schools with large minority populations to nominate qualified students. And in the fall, Rice sends two recruiters on the road to find minority applicants; each recruiter visits about 80 predominantly black or Hispanic high schools. Two weeks ago, Rice recruiter Tamara Siler dropped in on Westlake High in Atlanta, where 99% of the 1, 296 students are black. Siler went bearing literature and advice, and though only two kids showed up, she said, " I'm pleased I got two."
Rice has also resorted to some almost comical end-runs around the spirit of the law. The university used to award a yearly scholarship to a Mexican-American student; now it goes to a student who speaks Spanish really well. Admissions officers no longer know an applicant's race. But a new essay question asks about each student's " background" and " cultural traditions." When Rice officials read applications, they look for " diverse life experiences" and what they awkwardly call " overcome students, " who have triumphed over hardship.
Last spring, admissions readers came across a student whose SAT score was lower than 1, 200 and who did not rank in the top 10% of her class. Numerically speaking, she lagged far behind most accepted applicants. But her essay and recommendations indicated a strong interest in civil rights and personal experience with racial discrimination. She was admitted. " All the newspapers say affirmative action is done, " says a veteran counselor at a large New York City high school. " But nothing has changed. I have a [minority] kid at Yale with an SAT score in the high 900s."
While minority admissions at the University of California system overall have dipped only slightly since a ban on affirmative action took effect in 1998, they have plummeted at the most selective campuses. At Berkeley, for example, the class entering this fall included 608 Chicano students, vs. 1, 013 in 1997. In response, the elite schools have moved aggressively to recruit at minority high schools--and even to improve the performance of students who are graduating from them. This year the U.C. system will spend $250 million on outreach, from installing tutors at low-income schools to inviting high school teachers to summer calculus seminars. | 617.txt | 2 |
[
"Rice wanted to maintain minority enrollment",
"minority students have better school performance",
"Rice has a large minority population",
"Rice is famous for admitting minority students"
] | Rice University sent two recruiters to find minority applicants because _ . | As students primp and preen to wow their favorite colleges, there's one characteristic they can't control： their race. That's one reason voters, courts and politicians in six states have outlawed racial preferences in college admissions, while other colleges, fearful of lawsuits, play down their affirmative-action efforts these days. But make no mistake： race still matters. How much depends on the school and the state.
In Texas, public universities have managed to counteract the effect of racial-preference bans by automatically admitting the top 10% of the graduating class of every high school, including those schools where most students are minorities. But Rice University in Houston, private and highly selective, has had to reinvent its admissions strategies to maintain the school's minority enrollment. Each February, 80 to 90 black, Hispanic and Native American kids visit Rice on an expenses-paid trip. Rice urges counselors from high schools with large minority populations to nominate qualified students. And in the fall, Rice sends two recruiters on the road to find minority applicants; each recruiter visits about 80 predominantly black or Hispanic high schools. Two weeks ago, Rice recruiter Tamara Siler dropped in on Westlake High in Atlanta, where 99% of the 1, 296 students are black. Siler went bearing literature and advice, and though only two kids showed up, she said, " I'm pleased I got two."
Rice has also resorted to some almost comical end-runs around the spirit of the law. The university used to award a yearly scholarship to a Mexican-American student; now it goes to a student who speaks Spanish really well. Admissions officers no longer know an applicant's race. But a new essay question asks about each student's " background" and " cultural traditions." When Rice officials read applications, they look for " diverse life experiences" and what they awkwardly call " overcome students, " who have triumphed over hardship.
Last spring, admissions readers came across a student whose SAT score was lower than 1, 200 and who did not rank in the top 10% of her class. Numerically speaking, she lagged far behind most accepted applicants. But her essay and recommendations indicated a strong interest in civil rights and personal experience with racial discrimination. She was admitted. " All the newspapers say affirmative action is done, " says a veteran counselor at a large New York City high school. " But nothing has changed. I have a [minority] kid at Yale with an SAT score in the high 900s."
While minority admissions at the University of California system overall have dipped only slightly since a ban on affirmative action took effect in 1998, they have plummeted at the most selective campuses. At Berkeley, for example, the class entering this fall included 608 Chicano students, vs. 1, 013 in 1997. In response, the elite schools have moved aggressively to recruit at minority high schools--and even to improve the performance of students who are graduating from them. This year the U.C. system will spend $250 million on outreach, from installing tutors at low-income schools to inviting high school teachers to summer calculus seminars. | 617.txt | 0 |
[
"Rice abides by the law strictly",
"Rice deals with students in a comic way",
"Rice prefers minority students",
"Rice has its own ways of dealing with the law"
] | The writer mentioned Rice‘s some comic end-runs around the spirit of the law to show that _ . | As students primp and preen to wow their favorite colleges, there's one characteristic they can't control： their race. That's one reason voters, courts and politicians in six states have outlawed racial preferences in college admissions, while other colleges, fearful of lawsuits, play down their affirmative-action efforts these days. But make no mistake： race still matters. How much depends on the school and the state.
In Texas, public universities have managed to counteract the effect of racial-preference bans by automatically admitting the top 10% of the graduating class of every high school, including those schools where most students are minorities. But Rice University in Houston, private and highly selective, has had to reinvent its admissions strategies to maintain the school's minority enrollment. Each February, 80 to 90 black, Hispanic and Native American kids visit Rice on an expenses-paid trip. Rice urges counselors from high schools with large minority populations to nominate qualified students. And in the fall, Rice sends two recruiters on the road to find minority applicants; each recruiter visits about 80 predominantly black or Hispanic high schools. Two weeks ago, Rice recruiter Tamara Siler dropped in on Westlake High in Atlanta, where 99% of the 1, 296 students are black. Siler went bearing literature and advice, and though only two kids showed up, she said, " I'm pleased I got two."
Rice has also resorted to some almost comical end-runs around the spirit of the law. The university used to award a yearly scholarship to a Mexican-American student; now it goes to a student who speaks Spanish really well. Admissions officers no longer know an applicant's race. But a new essay question asks about each student's " background" and " cultural traditions." When Rice officials read applications, they look for " diverse life experiences" and what they awkwardly call " overcome students, " who have triumphed over hardship.
Last spring, admissions readers came across a student whose SAT score was lower than 1, 200 and who did not rank in the top 10% of her class. Numerically speaking, she lagged far behind most accepted applicants. But her essay and recommendations indicated a strong interest in civil rights and personal experience with racial discrimination. She was admitted. " All the newspapers say affirmative action is done, " says a veteran counselor at a large New York City high school. " But nothing has changed. I have a [minority] kid at Yale with an SAT score in the high 900s."
While minority admissions at the University of California system overall have dipped only slightly since a ban on affirmative action took effect in 1998, they have plummeted at the most selective campuses. At Berkeley, for example, the class entering this fall included 608 Chicano students, vs. 1, 013 in 1997. In response, the elite schools have moved aggressively to recruit at minority high schools--and even to improve the performance of students who are graduating from them. This year the U.C. system will spend $250 million on outreach, from installing tutors at low-income schools to inviting high school teachers to summer calculus seminars. | 617.txt | 3 |
[
"are still benefiting from affirmative action",
"have lower SAT scores",
"are often admitted by universities because they have unique racial experience",
"lag far behind than other students in school performance"
] | It seems that minority students _ . | As students primp and preen to wow their favorite colleges, there's one characteristic they can't control： their race. That's one reason voters, courts and politicians in six states have outlawed racial preferences in college admissions, while other colleges, fearful of lawsuits, play down their affirmative-action efforts these days. But make no mistake： race still matters. How much depends on the school and the state.
In Texas, public universities have managed to counteract the effect of racial-preference bans by automatically admitting the top 10% of the graduating class of every high school, including those schools where most students are minorities. But Rice University in Houston, private and highly selective, has had to reinvent its admissions strategies to maintain the school's minority enrollment. Each February, 80 to 90 black, Hispanic and Native American kids visit Rice on an expenses-paid trip. Rice urges counselors from high schools with large minority populations to nominate qualified students. And in the fall, Rice sends two recruiters on the road to find minority applicants; each recruiter visits about 80 predominantly black or Hispanic high schools. Two weeks ago, Rice recruiter Tamara Siler dropped in on Westlake High in Atlanta, where 99% of the 1, 296 students are black. Siler went bearing literature and advice, and though only two kids showed up, she said, " I'm pleased I got two."
Rice has also resorted to some almost comical end-runs around the spirit of the law. The university used to award a yearly scholarship to a Mexican-American student; now it goes to a student who speaks Spanish really well. Admissions officers no longer know an applicant's race. But a new essay question asks about each student's " background" and " cultural traditions." When Rice officials read applications, they look for " diverse life experiences" and what they awkwardly call " overcome students, " who have triumphed over hardship.
Last spring, admissions readers came across a student whose SAT score was lower than 1, 200 and who did not rank in the top 10% of her class. Numerically speaking, she lagged far behind most accepted applicants. But her essay and recommendations indicated a strong interest in civil rights and personal experience with racial discrimination. She was admitted. " All the newspapers say affirmative action is done, " says a veteran counselor at a large New York City high school. " But nothing has changed. I have a [minority] kid at Yale with an SAT score in the high 900s."
While minority admissions at the University of California system overall have dipped only slightly since a ban on affirmative action took effect in 1998, they have plummeted at the most selective campuses. At Berkeley, for example, the class entering this fall included 608 Chicano students, vs. 1, 013 in 1997. In response, the elite schools have moved aggressively to recruit at minority high schools--and even to improve the performance of students who are graduating from them. This year the U.C. system will spend $250 million on outreach, from installing tutors at low-income schools to inviting high school teachers to summer calculus seminars. | 617.txt | 0 |
[
"doubled",
"risen",
"stayed the same",
"decreased"
] | The word " plummeted" (Line 2, Paragraph 5) most probably means _ . | As students primp and preen to wow their favorite colleges, there's one characteristic they can't control： their race. That's one reason voters, courts and politicians in six states have outlawed racial preferences in college admissions, while other colleges, fearful of lawsuits, play down their affirmative-action efforts these days. But make no mistake： race still matters. How much depends on the school and the state.
In Texas, public universities have managed to counteract the effect of racial-preference bans by automatically admitting the top 10% of the graduating class of every high school, including those schools where most students are minorities. But Rice University in Houston, private and highly selective, has had to reinvent its admissions strategies to maintain the school's minority enrollment. Each February, 80 to 90 black, Hispanic and Native American kids visit Rice on an expenses-paid trip. Rice urges counselors from high schools with large minority populations to nominate qualified students. And in the fall, Rice sends two recruiters on the road to find minority applicants; each recruiter visits about 80 predominantly black or Hispanic high schools. Two weeks ago, Rice recruiter Tamara Siler dropped in on Westlake High in Atlanta, where 99% of the 1, 296 students are black. Siler went bearing literature and advice, and though only two kids showed up, she said, " I'm pleased I got two."
Rice has also resorted to some almost comical end-runs around the spirit of the law. The university used to award a yearly scholarship to a Mexican-American student; now it goes to a student who speaks Spanish really well. Admissions officers no longer know an applicant's race. But a new essay question asks about each student's " background" and " cultural traditions." When Rice officials read applications, they look for " diverse life experiences" and what they awkwardly call " overcome students, " who have triumphed over hardship.
Last spring, admissions readers came across a student whose SAT score was lower than 1, 200 and who did not rank in the top 10% of her class. Numerically speaking, she lagged far behind most accepted applicants. But her essay and recommendations indicated a strong interest in civil rights and personal experience with racial discrimination. She was admitted. " All the newspapers say affirmative action is done, " says a veteran counselor at a large New York City high school. " But nothing has changed. I have a [minority] kid at Yale with an SAT score in the high 900s."
While minority admissions at the University of California system overall have dipped only slightly since a ban on affirmative action took effect in 1998, they have plummeted at the most selective campuses. At Berkeley, for example, the class entering this fall included 608 Chicano students, vs. 1, 013 in 1997. In response, the elite schools have moved aggressively to recruit at minority high schools--and even to improve the performance of students who are graduating from them. This year the U.C. system will spend $250 million on outreach, from installing tutors at low-income schools to inviting high school teachers to summer calculus seminars. | 617.txt | 3 |
[
"scratching and twitching",
"squirming and wigging",
"slow running",
"moving one's body nervously"
] | Which of the following can be used to explain the meaning of "fidgeting"? | Have you eaten too much over the holidays? You should try fidgeting for a while. Those around you might not like it, but scratching (moving your nails against a part of your body) and twitching (moving suddenly and quickly when you don' t want to) is an important way of burning up calories .
American researchers have found that some people's squirming (continuously turn your body when nervous) and wigging (move in small movements, especially from side to side) equals several miles of slow running each day.
The scientists, based at the National Institute of Health's laboratory in Phenix, Arizona, are studying why some people get fat and other stay slim.
In one study 177 people each spent 24 hours in a room in the institute where the amount of energy is measured by their oxygen and carbon dioxide levels. By the end of the day, some people had burned up 800 calories in toe-tapping, (moving the front part of your foot up and down) finger-drumming (hitting your fingers continuously and lightly against something hard) and other nervous habits. However, others had burned up only 100 calories.
The researchers found that slim women fidget more than fat women, but there was no significant difference in men. Heavy people burn up more energy when they fidget than do thin people. | 1030.txt | 3 |
[
"thin people burn up less calories than fat people",
"fat people burn up more calories than thin people",
"those who burn up more calories than others will be thinner",
"those who fidget more than others will be thinner"
] | We can know from the passage that scientists believe the reason why some people get fat and other people stay slim is that _ . | Have you eaten too much over the holidays? You should try fidgeting for a while. Those around you might not like it, but scratching (moving your nails against a part of your body) and twitching (moving suddenly and quickly when you don' t want to) is an important way of burning up calories .
American researchers have found that some people's squirming (continuously turn your body when nervous) and wigging (move in small movements, especially from side to side) equals several miles of slow running each day.
The scientists, based at the National Institute of Health's laboratory in Phenix, Arizona, are studying why some people get fat and other stay slim.
In one study 177 people each spent 24 hours in a room in the institute where the amount of energy is measured by their oxygen and carbon dioxide levels. By the end of the day, some people had burned up 800 calories in toe-tapping, (moving the front part of your foot up and down) finger-drumming (hitting your fingers continuously and lightly against something hard) and other nervous habits. However, others had burned up only 100 calories.
The researchers found that slim women fidget more than fat women, but there was no significant difference in men. Heavy people burn up more energy when they fidget than do thin people. | 1030.txt | 2 |
[
"the energy burned up by fat people when they fidget was more than that burned up by thin people when they fidget",
"some people's fidgeting burned up more than 800 calories, but some people's fidgeting burned up less than 100 calories",
"slim women fidget more than fat women but fat men fidget more than thin men",
"thin men fidget more than fat men"
] | Scientists found in the experiment that _ . | Have you eaten too much over the holidays? You should try fidgeting for a while. Those around you might not like it, but scratching (moving your nails against a part of your body) and twitching (moving suddenly and quickly when you don' t want to) is an important way of burning up calories .
American researchers have found that some people's squirming (continuously turn your body when nervous) and wigging (move in small movements, especially from side to side) equals several miles of slow running each day.
The scientists, based at the National Institute of Health's laboratory in Phenix, Arizona, are studying why some people get fat and other stay slim.
In one study 177 people each spent 24 hours in a room in the institute where the amount of energy is measured by their oxygen and carbon dioxide levels. By the end of the day, some people had burned up 800 calories in toe-tapping, (moving the front part of your foot up and down) finger-drumming (hitting your fingers continuously and lightly against something hard) and other nervous habits. However, others had burned up only 100 calories.
The researchers found that slim women fidget more than fat women, but there was no significant difference in men. Heavy people burn up more energy when they fidget than do thin people. | 1030.txt | 0 |
[
"skinny",
"bony",
"slim",
"underweight"
] | If someone is thin in a pleasant way, we say they are _ . | Have you eaten too much over the holidays? You should try fidgeting for a while. Those around you might not like it, but scratching (moving your nails against a part of your body) and twitching (moving suddenly and quickly when you don' t want to) is an important way of burning up calories .
American researchers have found that some people's squirming (continuously turn your body when nervous) and wigging (move in small movements, especially from side to side) equals several miles of slow running each day.
The scientists, based at the National Institute of Health's laboratory in Phenix, Arizona, are studying why some people get fat and other stay slim.
In one study 177 people each spent 24 hours in a room in the institute where the amount of energy is measured by their oxygen and carbon dioxide levels. By the end of the day, some people had burned up 800 calories in toe-tapping, (moving the front part of your foot up and down) finger-drumming (hitting your fingers continuously and lightly against something hard) and other nervous habits. However, others had burned up only 100 calories.
The researchers found that slim women fidget more than fat women, but there was no significant difference in men. Heavy people burn up more energy when they fidget than do thin people. | 1030.txt | 2 |
[
"a way to lose fat",
"a nervous habit annoying the people around",
"a better exercise than slow running",
"a habit of thin people"
] | Scientists think a fidget habit to be _ . | Have you eaten too much over the holidays? You should try fidgeting for a while. Those around you might not like it, but scratching (moving your nails against a part of your body) and twitching (moving suddenly and quickly when you don' t want to) is an important way of burning up calories .
American researchers have found that some people's squirming (continuously turn your body when nervous) and wigging (move in small movements, especially from side to side) equals several miles of slow running each day.
The scientists, based at the National Institute of Health's laboratory in Phenix, Arizona, are studying why some people get fat and other stay slim.
In one study 177 people each spent 24 hours in a room in the institute where the amount of energy is measured by their oxygen and carbon dioxide levels. By the end of the day, some people had burned up 800 calories in toe-tapping, (moving the front part of your foot up and down) finger-drumming (hitting your fingers continuously and lightly against something hard) and other nervous habits. However, others had burned up only 100 calories.
The researchers found that slim women fidget more than fat women, but there was no significant difference in men. Heavy people burn up more energy when they fidget than do thin people. | 1030.txt | 0 |
[
"Both of them are envioroment-friendly.",
"Both of them are from small companies of California and then expand outwards.",
"Both of them are originated from the marginal status of the industry.",
"Both of them are created by green hands of automobile business."
] | Which one of the following statements is NOT true of the common characterists of Tesla and Aptera? | Aptera is certainly not the sort of name an old-school carmaker would give to its newest creation. Biologists will recognise it as the term for scuttling wingless insects-silverfish and suchlike. But Steve Fambro, the boss of the eponymous Californian company that plans to make and sell electric vehicles under this name, hopes they will soon be swarming over the state's highways.
Unlike Tesla, another boutique electric-vehicle maker from the Golden State, Aptera is aiming for the bottom end of the market. A Tesla sports car will set you back $98,000 (or it would if you could get your hands on one: Tesla has delayed shipment of its first 50 cars until next year). An Aptera, by contrast, starts at $26,900, and should be available this time next year. And instead of a Ferrari knock-off, you get a space-age tricycle. But Aptera and Tesla have things in common. They are both small. They were both started by people with no experience in the motor industry. And they are both aiming to start by roping in the eco-fashionistas of California, and then work outwards to the mainstream.
The name Aptera was chosen because the vehicle resembles a small, wingless aircraft. Its three-wheel design exempts it from onerous federal testing regulations. The outer shell is made of a carbon-fibre composite, rather than metal. The lines are wind-tunnel aerodynamic. And protuberances are kept to a minimum. Wing mirrors, for example, are replaced by a rear-facing camera with a 180° field of view and the exhaust valves are recessed to minimise turbulence. In the pure plug-in version, those valves are for waste heat from the electronics. There is also a petrol-electric hybrid, with a single-cylinder generator that extends the range from 200km to 1,130km. Top speed is 150kph.
One reason for the emergence of firms such as Aptera is that designing a new vehicle has become as much an exercise in software simulation as in metal (or even carbon-fibre) bashing. That enables the firm's engineers to do extensive development work-even things like crash-testing-on a computer. This is much cheaper than building endless prototypes and driving lots of them into walls. Another reason is the widespread availability of previously specialised components such as lithium-ion batteries. That means that an upstart such as Aptera can focus on the electronic brains of the vehicle and its final assembly, rather than having to make everything from scratch. It can thus, it believes, turn a profit without having to produce large volumes.
Automotive history is littered with failed attempts to build electric cars, and sceptics might think the latest batch will be no different. That there is a fashion for such vehicles, though, is hard to deny. Besides Aptera and Tesla-which are, in their different ways, the most conspicuous examples-Venture Vehicles of Los Angeles is proposing an electric version of the Dutch Carver three-wheeled motorbike, while Phoenix Motorcars of Ontario, California, has produced a sports-utility truck. Meanwhile, REVA, an Indian firm, and Think Global, a Norwegian one, are making two-door hatchbacks. Indeed, according to the Venture Capital Journal, about $220m has been invested in such small firms over the past year and a half. | 3599.txt | 1 |
[
"Top speed of the hybrid is higher than than of the other versions.",
"The hybrid possesses a stronger capacity of long-distance drive with rapid speed.",
"The hybrid has a special generator that is characterized by a sole cylinder.",
"The hybrid generate more turbulence than the other versions."
] | The petrol-electric hybrid version of Aptera is different from its other versions in that _ | Aptera is certainly not the sort of name an old-school carmaker would give to its newest creation. Biologists will recognise it as the term for scuttling wingless insects-silverfish and suchlike. But Steve Fambro, the boss of the eponymous Californian company that plans to make and sell electric vehicles under this name, hopes they will soon be swarming over the state's highways.
Unlike Tesla, another boutique electric-vehicle maker from the Golden State, Aptera is aiming for the bottom end of the market. A Tesla sports car will set you back $98,000 (or it would if you could get your hands on one: Tesla has delayed shipment of its first 50 cars until next year). An Aptera, by contrast, starts at $26,900, and should be available this time next year. And instead of a Ferrari knock-off, you get a space-age tricycle. But Aptera and Tesla have things in common. They are both small. They were both started by people with no experience in the motor industry. And they are both aiming to start by roping in the eco-fashionistas of California, and then work outwards to the mainstream.
The name Aptera was chosen because the vehicle resembles a small, wingless aircraft. Its three-wheel design exempts it from onerous federal testing regulations. The outer shell is made of a carbon-fibre composite, rather than metal. The lines are wind-tunnel aerodynamic. And protuberances are kept to a minimum. Wing mirrors, for example, are replaced by a rear-facing camera with a 180° field of view and the exhaust valves are recessed to minimise turbulence. In the pure plug-in version, those valves are for waste heat from the electronics. There is also a petrol-electric hybrid, with a single-cylinder generator that extends the range from 200km to 1,130km. Top speed is 150kph.
One reason for the emergence of firms such as Aptera is that designing a new vehicle has become as much an exercise in software simulation as in metal (or even carbon-fibre) bashing. That enables the firm's engineers to do extensive development work-even things like crash-testing-on a computer. This is much cheaper than building endless prototypes and driving lots of them into walls. Another reason is the widespread availability of previously specialised components such as lithium-ion batteries. That means that an upstart such as Aptera can focus on the electronic brains of the vehicle and its final assembly, rather than having to make everything from scratch. It can thus, it believes, turn a profit without having to produce large volumes.
Automotive history is littered with failed attempts to build electric cars, and sceptics might think the latest batch will be no different. That there is a fashion for such vehicles, though, is hard to deny. Besides Aptera and Tesla-which are, in their different ways, the most conspicuous examples-Venture Vehicles of Los Angeles is proposing an electric version of the Dutch Carver three-wheeled motorbike, while Phoenix Motorcars of Ontario, California, has produced a sports-utility truck. Meanwhile, REVA, an Indian firm, and Think Global, a Norwegian one, are making two-door hatchbacks. Indeed, according to the Venture Capital Journal, about $220m has been invested in such small firms over the past year and a half. | 3599.txt | 1 |
[
"protrusion.",
"accessory.",
"adjunct.",
"impetus."
] | The word "protuberance" (Line 4, Paragraph 3) most probably means _ | Aptera is certainly not the sort of name an old-school carmaker would give to its newest creation. Biologists will recognise it as the term for scuttling wingless insects-silverfish and suchlike. But Steve Fambro, the boss of the eponymous Californian company that plans to make and sell electric vehicles under this name, hopes they will soon be swarming over the state's highways.
Unlike Tesla, another boutique electric-vehicle maker from the Golden State, Aptera is aiming for the bottom end of the market. A Tesla sports car will set you back $98,000 (or it would if you could get your hands on one: Tesla has delayed shipment of its first 50 cars until next year). An Aptera, by contrast, starts at $26,900, and should be available this time next year. And instead of a Ferrari knock-off, you get a space-age tricycle. But Aptera and Tesla have things in common. They are both small. They were both started by people with no experience in the motor industry. And they are both aiming to start by roping in the eco-fashionistas of California, and then work outwards to the mainstream.
The name Aptera was chosen because the vehicle resembles a small, wingless aircraft. Its three-wheel design exempts it from onerous federal testing regulations. The outer shell is made of a carbon-fibre composite, rather than metal. The lines are wind-tunnel aerodynamic. And protuberances are kept to a minimum. Wing mirrors, for example, are replaced by a rear-facing camera with a 180° field of view and the exhaust valves are recessed to minimise turbulence. In the pure plug-in version, those valves are for waste heat from the electronics. There is also a petrol-electric hybrid, with a single-cylinder generator that extends the range from 200km to 1,130km. Top speed is 150kph.
One reason for the emergence of firms such as Aptera is that designing a new vehicle has become as much an exercise in software simulation as in metal (or even carbon-fibre) bashing. That enables the firm's engineers to do extensive development work-even things like crash-testing-on a computer. This is much cheaper than building endless prototypes and driving lots of them into walls. Another reason is the widespread availability of previously specialised components such as lithium-ion batteries. That means that an upstart such as Aptera can focus on the electronic brains of the vehicle and its final assembly, rather than having to make everything from scratch. It can thus, it believes, turn a profit without having to produce large volumes.
Automotive history is littered with failed attempts to build electric cars, and sceptics might think the latest batch will be no different. That there is a fashion for such vehicles, though, is hard to deny. Besides Aptera and Tesla-which are, in their different ways, the most conspicuous examples-Venture Vehicles of Los Angeles is proposing an electric version of the Dutch Carver three-wheeled motorbike, while Phoenix Motorcars of Ontario, California, has produced a sports-utility truck. Meanwhile, REVA, an Indian firm, and Think Global, a Norwegian one, are making two-door hatchbacks. Indeed, according to the Venture Capital Journal, about $220m has been invested in such small firms over the past year and a half. | 3599.txt | 0 |
[
"Technologies of metal bashing simulation are well developped.",
"The cost of making cars is greatly reduced.",
"Some specialized parts are available to them.",
"Large venture investment is devoted to such business."
] | Firms such as Aptera are growing up because of the following reasons except _ | Aptera is certainly not the sort of name an old-school carmaker would give to its newest creation. Biologists will recognise it as the term for scuttling wingless insects-silverfish and suchlike. But Steve Fambro, the boss of the eponymous Californian company that plans to make and sell electric vehicles under this name, hopes they will soon be swarming over the state's highways.
Unlike Tesla, another boutique electric-vehicle maker from the Golden State, Aptera is aiming for the bottom end of the market. A Tesla sports car will set you back $98,000 (or it would if you could get your hands on one: Tesla has delayed shipment of its first 50 cars until next year). An Aptera, by contrast, starts at $26,900, and should be available this time next year. And instead of a Ferrari knock-off, you get a space-age tricycle. But Aptera and Tesla have things in common. They are both small. They were both started by people with no experience in the motor industry. And they are both aiming to start by roping in the eco-fashionistas of California, and then work outwards to the mainstream.
The name Aptera was chosen because the vehicle resembles a small, wingless aircraft. Its three-wheel design exempts it from onerous federal testing regulations. The outer shell is made of a carbon-fibre composite, rather than metal. The lines are wind-tunnel aerodynamic. And protuberances are kept to a minimum. Wing mirrors, for example, are replaced by a rear-facing camera with a 180° field of view and the exhaust valves are recessed to minimise turbulence. In the pure plug-in version, those valves are for waste heat from the electronics. There is also a petrol-electric hybrid, with a single-cylinder generator that extends the range from 200km to 1,130km. Top speed is 150kph.
One reason for the emergence of firms such as Aptera is that designing a new vehicle has become as much an exercise in software simulation as in metal (or even carbon-fibre) bashing. That enables the firm's engineers to do extensive development work-even things like crash-testing-on a computer. This is much cheaper than building endless prototypes and driving lots of them into walls. Another reason is the widespread availability of previously specialised components such as lithium-ion batteries. That means that an upstart such as Aptera can focus on the electronic brains of the vehicle and its final assembly, rather than having to make everything from scratch. It can thus, it believes, turn a profit without having to produce large volumes.
Automotive history is littered with failed attempts to build electric cars, and sceptics might think the latest batch will be no different. That there is a fashion for such vehicles, though, is hard to deny. Besides Aptera and Tesla-which are, in their different ways, the most conspicuous examples-Venture Vehicles of Los Angeles is proposing an electric version of the Dutch Carver three-wheeled motorbike, while Phoenix Motorcars of Ontario, California, has produced a sports-utility truck. Meanwhile, REVA, an Indian firm, and Think Global, a Norwegian one, are making two-door hatchbacks. Indeed, according to the Venture Capital Journal, about $220m has been invested in such small firms over the past year and a half. | 3599.txt | 3 |
[
"optimistic.",
"lukewarm.",
"wait-and-see.",
"enthusiastic."
] | Towards to the future of the electric cars, the author's attitude can be said to be _ | Aptera is certainly not the sort of name an old-school carmaker would give to its newest creation. Biologists will recognise it as the term for scuttling wingless insects-silverfish and suchlike. But Steve Fambro, the boss of the eponymous Californian company that plans to make and sell electric vehicles under this name, hopes they will soon be swarming over the state's highways.
Unlike Tesla, another boutique electric-vehicle maker from the Golden State, Aptera is aiming for the bottom end of the market. A Tesla sports car will set you back $98,000 (or it would if you could get your hands on one: Tesla has delayed shipment of its first 50 cars until next year). An Aptera, by contrast, starts at $26,900, and should be available this time next year. And instead of a Ferrari knock-off, you get a space-age tricycle. But Aptera and Tesla have things in common. They are both small. They were both started by people with no experience in the motor industry. And they are both aiming to start by roping in the eco-fashionistas of California, and then work outwards to the mainstream.
The name Aptera was chosen because the vehicle resembles a small, wingless aircraft. Its three-wheel design exempts it from onerous federal testing regulations. The outer shell is made of a carbon-fibre composite, rather than metal. The lines are wind-tunnel aerodynamic. And protuberances are kept to a minimum. Wing mirrors, for example, are replaced by a rear-facing camera with a 180° field of view and the exhaust valves are recessed to minimise turbulence. In the pure plug-in version, those valves are for waste heat from the electronics. There is also a petrol-electric hybrid, with a single-cylinder generator that extends the range from 200km to 1,130km. Top speed is 150kph.
One reason for the emergence of firms such as Aptera is that designing a new vehicle has become as much an exercise in software simulation as in metal (or even carbon-fibre) bashing. That enables the firm's engineers to do extensive development work-even things like crash-testing-on a computer. This is much cheaper than building endless prototypes and driving lots of them into walls. Another reason is the widespread availability of previously specialised components such as lithium-ion batteries. That means that an upstart such as Aptera can focus on the electronic brains of the vehicle and its final assembly, rather than having to make everything from scratch. It can thus, it believes, turn a profit without having to produce large volumes.
Automotive history is littered with failed attempts to build electric cars, and sceptics might think the latest batch will be no different. That there is a fashion for such vehicles, though, is hard to deny. Besides Aptera and Tesla-which are, in their different ways, the most conspicuous examples-Venture Vehicles of Los Angeles is proposing an electric version of the Dutch Carver three-wheeled motorbike, while Phoenix Motorcars of Ontario, California, has produced a sports-utility truck. Meanwhile, REVA, an Indian firm, and Think Global, a Norwegian one, are making two-door hatchbacks. Indeed, according to the Venture Capital Journal, about $220m has been invested in such small firms over the past year and a half. | 3599.txt | 0 |
[
"A good story.",
"Film.",
"Digital cameras.",
"Videotape."
] | According to George Lucas, what makes the best made movies possible? | Most people who enjoy movies do not really care how they are made. They just want to enjoy a good story. Movie producer and director George Lucas wants people to see the best made movies. So, his latest movie Star Wars was made without using film.
Star Wars was made using digital cameras. A digital camera does not use traditional film. It captures images on videotape. The images recorded on videotape are the placed in a computer.
George Lucas says that using digital cameras permits him to have much more control over the final product. For example, the image can be changed after it is placed in a computer. An expert can change color, add or take out objects, add people or beings who are not real. Much of what is seen in the new movie Star Wars is not real. Huge buildings, spacecraft and alien beings from other worlds were produced in a computer.
Movie experts say digital technology is the real future of the motion picture industry. A theater will no longer have to wait days or weeks to show a new movie. Theaters will be able to receive copies of new movies by linking computers. Or they will use small computer disks to get a copy of the movie.
When the new movie Star Wars was released last month, only 94 theaters around the world had the digital equipment needed to show it. So Mr. Lucas' company produced about 6,000 copies of the new digital movie on traditional film for release in most theaters. However, most people who have seen the movie say these film copies are of much better quality than other filmed movies.
Critics say the new digital technology is very costly. Many theater owners will not buy the new technology, yet many of the people who worked on the new movie Star Wars say they would not like to work with film again. They said using digital equipment was faster, and videotape is much less costly than film. One cameraman said the director of a movie can immediately see what was just recorded, something impossible to do with film. | 1020.txt | 2 |
[
"Linking computers for copies of new movies.",
"Showing filmed movies in theaters.",
"Using small computer disks to get a copy of the movie.",
"Having the digital equipment needed to show the movie."
] | Which is NOT true for the real future of the motion picture industry, according to movie experts? | Most people who enjoy movies do not really care how they are made. They just want to enjoy a good story. Movie producer and director George Lucas wants people to see the best made movies. So, his latest movie Star Wars was made without using film.
Star Wars was made using digital cameras. A digital camera does not use traditional film. It captures images on videotape. The images recorded on videotape are the placed in a computer.
George Lucas says that using digital cameras permits him to have much more control over the final product. For example, the image can be changed after it is placed in a computer. An expert can change color, add or take out objects, add people or beings who are not real. Much of what is seen in the new movie Star Wars is not real. Huge buildings, spacecraft and alien beings from other worlds were produced in a computer.
Movie experts say digital technology is the real future of the motion picture industry. A theater will no longer have to wait days or weeks to show a new movie. Theaters will be able to receive copies of new movies by linking computers. Or they will use small computer disks to get a copy of the movie.
When the new movie Star Wars was released last month, only 94 theaters around the world had the digital equipment needed to show it. So Mr. Lucas' company produced about 6,000 copies of the new digital movie on traditional film for release in most theaters. However, most people who have seen the movie say these film copies are of much better quality than other filmed movies.
Critics say the new digital technology is very costly. Many theater owners will not buy the new technology, yet many of the people who worked on the new movie Star Wars say they would not like to work with film again. They said using digital equipment was faster, and videotape is much less costly than film. One cameraman said the director of a movie can immediately see what was just recorded, something impossible to do with film. | 1020.txt | 1 |
[
"There are about 6,000 copies of the new digital movie.",
"It has been shown in only 94 theaters around the world.",
"It is the best among filmed movies.",
"It is the product of the new digital technology."
] | According to the passage, which is true about the new movie Star Wars? | Most people who enjoy movies do not really care how they are made. They just want to enjoy a good story. Movie producer and director George Lucas wants people to see the best made movies. So, his latest movie Star Wars was made without using film.
Star Wars was made using digital cameras. A digital camera does not use traditional film. It captures images on videotape. The images recorded on videotape are the placed in a computer.
George Lucas says that using digital cameras permits him to have much more control over the final product. For example, the image can be changed after it is placed in a computer. An expert can change color, add or take out objects, add people or beings who are not real. Much of what is seen in the new movie Star Wars is not real. Huge buildings, spacecraft and alien beings from other worlds were produced in a computer.
Movie experts say digital technology is the real future of the motion picture industry. A theater will no longer have to wait days or weeks to show a new movie. Theaters will be able to receive copies of new movies by linking computers. Or they will use small computer disks to get a copy of the movie.
When the new movie Star Wars was released last month, only 94 theaters around the world had the digital equipment needed to show it. So Mr. Lucas' company produced about 6,000 copies of the new digital movie on traditional film for release in most theaters. However, most people who have seen the movie say these film copies are of much better quality than other filmed movies.
Critics say the new digital technology is very costly. Many theater owners will not buy the new technology, yet many of the people who worked on the new movie Star Wars say they would not like to work with film again. They said using digital equipment was faster, and videotape is much less costly than film. One cameraman said the director of a movie can immediately see what was just recorded, something impossible to do with film. | 1020.txt | 3 |
[
"The director can have the objects and people added or taken out.",
"It will be more convenient for theaters to get such kind of new movies.",
"People all agree that the new digital movies are less costly than the filmed movies.",
"The director can monitor the recording and check what was recorded just now."
] | Which of the following is NOT the advantages of the new digital movie? | Most people who enjoy movies do not really care how they are made. They just want to enjoy a good story. Movie producer and director George Lucas wants people to see the best made movies. So, his latest movie Star Wars was made without using film.
Star Wars was made using digital cameras. A digital camera does not use traditional film. It captures images on videotape. The images recorded on videotape are the placed in a computer.
George Lucas says that using digital cameras permits him to have much more control over the final product. For example, the image can be changed after it is placed in a computer. An expert can change color, add or take out objects, add people or beings who are not real. Much of what is seen in the new movie Star Wars is not real. Huge buildings, spacecraft and alien beings from other worlds were produced in a computer.
Movie experts say digital technology is the real future of the motion picture industry. A theater will no longer have to wait days or weeks to show a new movie. Theaters will be able to receive copies of new movies by linking computers. Or they will use small computer disks to get a copy of the movie.
When the new movie Star Wars was released last month, only 94 theaters around the world had the digital equipment needed to show it. So Mr. Lucas' company produced about 6,000 copies of the new digital movie on traditional film for release in most theaters. However, most people who have seen the movie say these film copies are of much better quality than other filmed movies.
Critics say the new digital technology is very costly. Many theater owners will not buy the new technology, yet many of the people who worked on the new movie Star Wars say they would not like to work with film again. They said using digital equipment was faster, and videotape is much less costly than film. One cameraman said the director of a movie can immediately see what was just recorded, something impossible to do with film. | 1020.txt | 2 |
[
"no day really has twenty-four hours",
"the earth is divided into time zones",
"time zones are not all the same size",
"no one knows where time zones begin"
] | Strange things happen to time when you travel because _______ | Strange things happen to time when you travel, because the earth is divided into twenty-four time zones, one hour apart. You can have days with more or fewer than twenty-four hours, and weeks with more or fewer than seven days.
If you make a five-day trip across the Atlantic Ocean, your ship enters a different time zone every day, As you enter each zone, the time changes one hour. Traveling west, you set clock back; traveling east, you set it ahead. Each day of your trip has either twenty-five or twenty-three hours.
If you travel by ship across the Pacific, you cross the International Date Line. By agreement, this is the point where a new day begins. When you cross the line, you change your calendar one full day, backward or forward. Traveling east, today becomes yesterday; traveling west, it is tomorrow. | 1965.txt | 1 |
[
"one day",
"twenty-five hours",
"one hour",
"twenty-three hours"
] | The time difference between two neighboring zones is ________ | Strange things happen to time when you travel, because the earth is divided into twenty-four time zones, one hour apart. You can have days with more or fewer than twenty-four hours, and weeks with more or fewer than seven days.
If you make a five-day trip across the Atlantic Ocean, your ship enters a different time zone every day, As you enter each zone, the time changes one hour. Traveling west, you set clock back; traveling east, you set it ahead. Each day of your trip has either twenty-five or twenty-three hours.
If you travel by ship across the Pacific, you cross the International Date Line. By agreement, this is the point where a new day begins. When you cross the line, you change your calendar one full day, backward or forward. Traveling east, today becomes yesterday; traveling west, it is tomorrow. | 1965.txt | 2 |
[
"is one time zone",
"is divided into five time zones",
"is divided into twenty-four time zones",
"cannot be crossed in five days"
] | According to paragraph 2, it seems true that the Atlantic Ocean______ | Strange things happen to time when you travel, because the earth is divided into twenty-four time zones, one hour apart. You can have days with more or fewer than twenty-four hours, and weeks with more or fewer than seven days.
If you make a five-day trip across the Atlantic Ocean, your ship enters a different time zone every day, As you enter each zone, the time changes one hour. Traveling west, you set clock back; traveling east, you set it ahead. Each day of your trip has either twenty-five or twenty-three hours.
If you travel by ship across the Pacific, you cross the International Date Line. By agreement, this is the point where a new day begins. When you cross the line, you change your calendar one full day, backward or forward. Traveling east, today becomes yesterday; traveling west, it is tomorrow. | 1965.txt | 1 |
[
"ahead one hour in each new time zone",
"ahead one hour for the whole trip",
"back one hour in each new time zone",
"back one hour for the whole trip"
] | If you cross the ocean going east, you set your clock______ | Strange things happen to time when you travel, because the earth is divided into twenty-four time zones, one hour apart. You can have days with more or fewer than twenty-four hours, and weeks with more or fewer than seven days.
If you make a five-day trip across the Atlantic Ocean, your ship enters a different time zone every day, As you enter each zone, the time changes one hour. Traveling west, you set clock back; traveling east, you set it ahead. Each day of your trip has either twenty-five or twenty-three hours.
If you travel by ship across the Pacific, you cross the International Date Line. By agreement, this is the point where a new day begins. When you cross the line, you change your calendar one full day, backward or forward. Traveling east, today becomes yesterday; traveling west, it is tomorrow. | 1965.txt | 0 |
[
"the beginning of any new time zone",
"any point where time changes by one hour",
"the point where a new day starts",
"any time zone in the Pacific Ocean"
] | The International Date Line is the name for ______ | Strange things happen to time when you travel, because the earth is divided into twenty-four time zones, one hour apart. You can have days with more or fewer than twenty-four hours, and weeks with more or fewer than seven days.
If you make a five-day trip across the Atlantic Ocean, your ship enters a different time zone every day, As you enter each zone, the time changes one hour. Traveling west, you set clock back; traveling east, you set it ahead. Each day of your trip has either twenty-five or twenty-three hours.
If you travel by ship across the Pacific, you cross the International Date Line. By agreement, this is the point where a new day begins. When you cross the line, you change your calendar one full day, backward or forward. Traveling east, today becomes yesterday; traveling west, it is tomorrow. | 1965.txt | 2 |
[
"The two separate teams of scientists.",
"Scientists at the University of Washington，of California.Irvine and NASA's Lab.",
"Scientists at Pennsylvania State University.",
"Several glaciologists."
] | Who contributed to the Monday research? | The vast glaciers of western Antarctica are rapidly melting and losing ice to the sea and almost certainly have"passed the point of no return，"according to new work by two separate teams of scientists.
The likely result：a rise in global sea levels of 4 feet or more in the coming centuries，says research made public Monday by scientists at the University of Washington，the University of California-Irvine and NASA's Jet Propulsion Laboratory.
"It really is an amazingly distressing situation，"says Pennsylvania State University glaciologistSridhar Anandakrishnan，who was not affiliated with either study."This is a huge part of West Antarctica.and it seems to have been kicked over the edge."
The researchers say the fate of the glaciers is almost certainly beyond hope.
One study shows that a river of ice called Thwaites Glacier is probably in the early stages of collapse.Total collapse is almost inevitable.the study shows.
A second study shows that a halfdozen glaciers are pouring ice into the sea at an ever-greater pace.That will trigger 4 feet of sea-level rise，says study author Eric Rignot，a glaciologist at the University of Califomia-Irvine，and NASA's Jet Propulsion Laboratory.
"The retreat of ice in that area is unstoppable，"Rignot said at a briefing Monday,adding that the glaciers have"passed the point of no return."
Rignot and his team used data from satellites and aircraft to map changes in six West Antarctic glaciers and the terrain underlying these massive ice floes.The data show the glaciers are stretching out，thinning and shrinking in volume.They're A.so flowing faster from the continent's interior to the sea，dumping larger quantities of ice into the ocean than before and thereby raising sea levels.
At the same time，the portion of each glacier projecting into the sea is being melted from below by warm ocean water.That leads to a vicious cycle of more thinning and faster flow,and the local Terrain offers no barrier to the glaciers'retreat，the researchers report in an upcoming issue of Geophysical Research Leaers.
A report in this week's Science says the Thwaites Glacier will collapse.perhaps in 200 years.The paper doesn't specify the amount of sea-level rise associated with nlwaites'demise. | 1301.txt | 1 |
[
"It is on the edge of inevitable collapsing.",
"It has completely gone.",
"It is becoming 1arger in volume.",
"It is flowing to the sea."
] | What is the current situation of Thwaites Glacier? | The vast glaciers of western Antarctica are rapidly melting and losing ice to the sea and almost certainly have"passed the point of no return，"according to new work by two separate teams of scientists.
The likely result：a rise in global sea levels of 4 feet or more in the coming centuries，says research made public Monday by scientists at the University of Washington，the University of California-Irvine and NASA's Jet Propulsion Laboratory.
"It really is an amazingly distressing situation，"says Pennsylvania State University glaciologistSridhar Anandakrishnan，who was not affiliated with either study."This is a huge part of West Antarctica.and it seems to have been kicked over the edge."
The researchers say the fate of the glaciers is almost certainly beyond hope.
One study shows that a river of ice called Thwaites Glacier is probably in the early stages of collapse.Total collapse is almost inevitable.the study shows.
A second study shows that a halfdozen glaciers are pouring ice into the sea at an ever-greater pace.That will trigger 4 feet of sea-level rise，says study author Eric Rignot，a glaciologist at the University of Califomia-Irvine，and NASA's Jet Propulsion Laboratory.
"The retreat of ice in that area is unstoppable，"Rignot said at a briefing Monday,adding that the glaciers have"passed the point of no return."
Rignot and his team used data from satellites and aircraft to map changes in six West Antarctic glaciers and the terrain underlying these massive ice floes.The data show the glaciers are stretching out，thinning and shrinking in volume.They're A.so flowing faster from the continent's interior to the sea，dumping larger quantities of ice into the ocean than before and thereby raising sea levels.
At the same time，the portion of each glacier projecting into the sea is being melted from below by warm ocean water.That leads to a vicious cycle of more thinning and faster flow,and the local Terrain offers no barrier to the glaciers'retreat，the researchers report in an upcoming issue of Geophysical Research Leaers.
A report in this week's Science says the Thwaites Glacier will collapse.perhaps in 200 years.The paper doesn't specify the amount of sea-level rise associated with nlwaites'demise. | 1301.txt | 0 |
[
"They are becoming smaller in volume.",
"They are flowing at a faster speed to the sea.",
"They ale pouring more and mole ice into the sea.",
"All the above."
] | What are the problems ofAntarcfic glaciers? | The vast glaciers of western Antarctica are rapidly melting and losing ice to the sea and almost certainly have"passed the point of no return，"according to new work by two separate teams of scientists.
The likely result：a rise in global sea levels of 4 feet or more in the coming centuries，says research made public Monday by scientists at the University of Washington，the University of California-Irvine and NASA's Jet Propulsion Laboratory.
"It really is an amazingly distressing situation，"says Pennsylvania State University glaciologistSridhar Anandakrishnan，who was not affiliated with either study."This is a huge part of West Antarctica.and it seems to have been kicked over the edge."
The researchers say the fate of the glaciers is almost certainly beyond hope.
One study shows that a river of ice called Thwaites Glacier is probably in the early stages of collapse.Total collapse is almost inevitable.the study shows.
A second study shows that a halfdozen glaciers are pouring ice into the sea at an ever-greater pace.That will trigger 4 feet of sea-level rise，says study author Eric Rignot，a glaciologist at the University of Califomia-Irvine，and NASA's Jet Propulsion Laboratory.
"The retreat of ice in that area is unstoppable，"Rignot said at a briefing Monday,adding that the glaciers have"passed the point of no return."
Rignot and his team used data from satellites and aircraft to map changes in six West Antarctic glaciers and the terrain underlying these massive ice floes.The data show the glaciers are stretching out，thinning and shrinking in volume.They're A.so flowing faster from the continent's interior to the sea，dumping larger quantities of ice into the ocean than before and thereby raising sea levels.
At the same time，the portion of each glacier projecting into the sea is being melted from below by warm ocean water.That leads to a vicious cycle of more thinning and faster flow,and the local Terrain offers no barrier to the glaciers'retreat，the researchers report in an upcoming issue of Geophysical Research Leaers.
A report in this week's Science says the Thwaites Glacier will collapse.perhaps in 200 years.The paper doesn't specify the amount of sea-level rise associated with nlwaites'demise. | 1301.txt | 3 |
[
"The ice poured into the sea is being melted from above.",
"The melting of the ice can result in the vicious cycle of the glaciers'melting.",
"The local terrain has nothing to do with glacier retreat.",
"Warm ocean water can slow down the glaciers'melting."
] | What does the report in Geophysical Research Letters show? | The vast glaciers of western Antarctica are rapidly melting and losing ice to the sea and almost certainly have"passed the point of no return，"according to new work by two separate teams of scientists.
The likely result：a rise in global sea levels of 4 feet or more in the coming centuries，says research made public Monday by scientists at the University of Washington，the University of California-Irvine and NASA's Jet Propulsion Laboratory.
"It really is an amazingly distressing situation，"says Pennsylvania State University glaciologistSridhar Anandakrishnan，who was not affiliated with either study."This is a huge part of West Antarctica.and it seems to have been kicked over the edge."
The researchers say the fate of the glaciers is almost certainly beyond hope.
One study shows that a river of ice called Thwaites Glacier is probably in the early stages of collapse.Total collapse is almost inevitable.the study shows.
A second study shows that a halfdozen glaciers are pouring ice into the sea at an ever-greater pace.That will trigger 4 feet of sea-level rise，says study author Eric Rignot，a glaciologist at the University of Califomia-Irvine，and NASA's Jet Propulsion Laboratory.
"The retreat of ice in that area is unstoppable，"Rignot said at a briefing Monday,adding that the glaciers have"passed the point of no return."
Rignot and his team used data from satellites and aircraft to map changes in six West Antarctic glaciers and the terrain underlying these massive ice floes.The data show the glaciers are stretching out，thinning and shrinking in volume.They're A.so flowing faster from the continent's interior to the sea，dumping larger quantities of ice into the ocean than before and thereby raising sea levels.
At the same time，the portion of each glacier projecting into the sea is being melted from below by warm ocean water.That leads to a vicious cycle of more thinning and faster flow,and the local Terrain offers no barrier to the glaciers'retreat，the researchers report in an upcoming issue of Geophysical Research Leaers.
A report in this week's Science says the Thwaites Glacier will collapse.perhaps in 200 years.The paper doesn't specify the amount of sea-level rise associated with nlwaites'demise. | 1301.txt | 1 |
[
"The glaciers can't flow back to the continents.",
"The glaciers are different from what they were years ago.",
"The melting of glaciers has come to the stage of being inevitable.",
"The speed of glacier melting can't return to the former one."
] | According to the passage，what do the words"passed the point of no return"mean(Line 2，Para.1)? | The vast glaciers of western Antarctica are rapidly melting and losing ice to the sea and almost certainly have"passed the point of no return，"according to new work by two separate teams of scientists.
The likely result：a rise in global sea levels of 4 feet or more in the coming centuries，says research made public Monday by scientists at the University of Washington，the University of California-Irvine and NASA's Jet Propulsion Laboratory.
"It really is an amazingly distressing situation，"says Pennsylvania State University glaciologistSridhar Anandakrishnan，who was not affiliated with either study."This is a huge part of West Antarctica.and it seems to have been kicked over the edge."
The researchers say the fate of the glaciers is almost certainly beyond hope.
One study shows that a river of ice called Thwaites Glacier is probably in the early stages of collapse.Total collapse is almost inevitable.the study shows.
A second study shows that a halfdozen glaciers are pouring ice into the sea at an ever-greater pace.That will trigger 4 feet of sea-level rise，says study author Eric Rignot，a glaciologist at the University of Califomia-Irvine，and NASA's Jet Propulsion Laboratory.
"The retreat of ice in that area is unstoppable，"Rignot said at a briefing Monday,adding that the glaciers have"passed the point of no return."
Rignot and his team used data from satellites and aircraft to map changes in six West Antarctic glaciers and the terrain underlying these massive ice floes.The data show the glaciers are stretching out，thinning and shrinking in volume.They're A.so flowing faster from the continent's interior to the sea，dumping larger quantities of ice into the ocean than before and thereby raising sea levels.
At the same time，the portion of each glacier projecting into the sea is being melted from below by warm ocean water.That leads to a vicious cycle of more thinning and faster flow,and the local Terrain offers no barrier to the glaciers'retreat，the researchers report in an upcoming issue of Geophysical Research Leaers.
A report in this week's Science says the Thwaites Glacier will collapse.perhaps in 200 years.The paper doesn't specify the amount of sea-level rise associated with nlwaites'demise. | 1301.txt | 2 |
[
"I got home from school at 3 or 3:30 on the day of my birthday.",
"I dislike birthday parties held for me.",
"Henry agreed that he would not do anything on my birthday.",
"I knew there were some of my friends hiding in my room."
] | Which of the following sentences is NOT true? | If you know me well, you know I don't like birthday parties. At least, I don't like birthday parties given for me. I enjoy them when they're for other people, but when they're for me, I just don't like them.
I remember one birthday party some friends of mine had for me when I was a student at the university. Of course, I had told my best friend Henry that I didn't want a party and I made him promise he wouldn't do anything. He agreed. I should have known better than to believe him.
On the day of my birthday, we got home from school at about, oh, I don't know, three or half past three. We went inside and as usual I went into the bathroom and started to close the door when suddenly from behind the shower curtain, a kind of strange female voice started singing, " Happy birthday to you, happy birthday to you."
And then from all over the room, people joined in. There were about fifteen people hiding everywhere in the room.
They had got my roommate's key and got in earlier. They had all planned to come out of the hiding place just at the same time while singing. I guess I really upset their plans by going in just to wash my hands. | 676.txt | 3 |
[
"livingroom",
"bedroom",
"bathroom",
"diningroom"
] | I usually went into the _ when I got home from school. | If you know me well, you know I don't like birthday parties. At least, I don't like birthday parties given for me. I enjoy them when they're for other people, but when they're for me, I just don't like them.
I remember one birthday party some friends of mine had for me when I was a student at the university. Of course, I had told my best friend Henry that I didn't want a party and I made him promise he wouldn't do anything. He agreed. I should have known better than to believe him.
On the day of my birthday, we got home from school at about, oh, I don't know, three or half past three. We went inside and as usual I went into the bathroom and started to close the door when suddenly from behind the shower curtain, a kind of strange female voice started singing, " Happy birthday to you, happy birthday to you."
And then from all over the room, people joined in. There were about fifteen people hiding everywhere in the room.
They had got my roommate's key and got in earlier. They had all planned to come out of the hiding place just at the same time while singing. I guess I really upset their plans by going in just to wash my hands. | 676.txt | 2 |
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