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[
"Theyinvented false theories to explain things they didn't understand.",
"Theyfalsely claimed to know all about nature.",
"They didnot believe in results from scientific observation.",
"They paidlittle attention to the problems they didn't understand."
] | Which of thefollowing statemcnts is NOT true of scientists in earlier times? | It is hard to predict howscience is going to turn out, and if it is really good science it is impossibleto predict. If the things to be found are actually new, they are by definitionunknown in advance. You cannot make choices in this matter. You either havescience or you don't, and if you have it you are obliged to accept thesurprising and disturbing pieces of information, along with the neat andpromptly useful bits.
The only solid piece ofscientific truth about which I feel totally confident is that we are profoundlyignorant about nature. Indeed, I regard this as the major discovery of the pasthundred years of biology. It is, in its way, an illuminating piece of news.It would have amazed the brightest minds of the 18th century Enlightenment to be told byany of us how little we know and how bewildering seems the wayahead. It is this sudden confrontation with the depth and scopeof ignorance that represents the most significant contribution of the 20th centuryscience to the human intellect. In earlier times, we either pretended tounderstand how things worked or ignored the problem, or simply made up storiesto fill the gaps. Now that we have begun exploring in earnest, we are gettingglimpses of how huge the questions are, and how far from being answered.Because of this, we are depressed. It is not so bad being ignorant if you aretotally ignorant; the hard thing is knowing in some detail the reality ofignorance, the worst spots and here and there the not-so-bad spots, but no truelight at the end of the tunnel nor even any tunnels that can yet be trusted.
But we are making abeginning, and there ought to be some satisfaction. There are probably noquestions we can think up that can't be answered, sooner or later, includingeven the matter of consciousness. To be sure, there may well be questions wecan't think up, ever, and therefore limits to the reach of human intellect, butthat is another matter. Within our limits, we should be able to work our waythrough to all our answers, if we keep at it long enough, and pay attention. | 1715.txt | 2 |
[
"He isdepressed because of the ignorance of scientists.",
"He isdoubtful because of the enormous difficulties confronting it.",
"He is confidentthough he is aware of the enormous difficulties confronting it.",
"He is delighted because of theilluminating scientific findings."
] | What is theauthor's attitude towards science? | It is hard to predict howscience is going to turn out, and if it is really good science it is impossibleto predict. If the things to be found are actually new, they are by definitionunknown in advance. You cannot make choices in this matter. You either havescience or you don't, and if you have it you are obliged to accept thesurprising and disturbing pieces of information, along with the neat andpromptly useful bits.
The only solid piece ofscientific truth about which I feel totally confident is that we are profoundlyignorant about nature. Indeed, I regard this as the major discovery of the pasthundred years of biology. It is, in its way, an illuminating piece of news.It would have amazed the brightest minds of the 18th century Enlightenment to be told byany of us how little we know and how bewildering seems the wayahead. It is this sudden confrontation with the depth and scopeof ignorance that represents the most significant contribution of the 20th centuryscience to the human intellect. In earlier times, we either pretended tounderstand how things worked or ignored the problem, or simply made up storiesto fill the gaps. Now that we have begun exploring in earnest, we are gettingglimpses of how huge the questions are, and how far from being answered.Because of this, we are depressed. It is not so bad being ignorant if you aretotally ignorant; the hard thing is knowing in some detail the reality ofignorance, the worst spots and here and there the not-so-bad spots, but no truelight at the end of the tunnel nor even any tunnels that can yet be trusted.
But we are making abeginning, and there ought to be some satisfaction. There are probably noquestions we can think up that can't be answered, sooner or later, includingeven the matter of consciousness. To be sure, there may well be questions wecan't think up, ever, and therefore limits to the reach of human intellect, butthat is another matter. Within our limits, we should be able to work our waythrough to all our answers, if we keep at it long enough, and pay attention. | 1715.txt | 2 |
[
"man canfind solutions to whatever questions concerning nature he can think up",
"man can not solve all the problems he canthink up because of the limits of human intellect",
"sooner or later man canthink up all the questions concerning nature and answer them",
"questions concerningconsciousness are outside the scope of scientific research"
] | The authorbelieves that _ . | It is hard to predict howscience is going to turn out, and if it is really good science it is impossibleto predict. If the things to be found are actually new, they are by definitionunknown in advance. You cannot make choices in this matter. You either havescience or you don't, and if you have it you are obliged to accept thesurprising and disturbing pieces of information, along with the neat andpromptly useful bits.
The only solid piece ofscientific truth about which I feel totally confident is that we are profoundlyignorant about nature. Indeed, I regard this as the major discovery of the pasthundred years of biology. It is, in its way, an illuminating piece of news.It would have amazed the brightest minds of the 18th century Enlightenment to be told byany of us how little we know and how bewildering seems the wayahead. It is this sudden confrontation with the depth and scopeof ignorance that represents the most significant contribution of the 20th centuryscience to the human intellect. In earlier times, we either pretended tounderstand how things worked or ignored the problem, or simply made up storiesto fill the gaps. Now that we have begun exploring in earnest, we are gettingglimpses of how huge the questions are, and how far from being answered.Because of this, we are depressed. It is not so bad being ignorant if you aretotally ignorant; the hard thing is knowing in some detail the reality ofignorance, the worst spots and here and there the not-so-bad spots, but no truelight at the end of the tunnel nor even any tunnels that can yet be trusted.
But we are making abeginning, and there ought to be some satisfaction. There are probably noquestions we can think up that can't be answered, sooner or later, includingeven the matter of consciousness. To be sure, there may well be questions wecan't think up, ever, and therefore limits to the reach of human intellect, butthat is another matter. Within our limits, we should be able to work our waythrough to all our answers, if we keep at it long enough, and pay attention. | 1715.txt | 0 |
[
"it's unnecessary for good people to do anything in face of evil",
"it's certain that evil will prevail if good men do nothing about it",
"it's only natural for virtue to defeat evil",
"it's desirable for good men to keep away from evil"
] | What the wise man said suggests that . | A wise man once said that the only thing necessary for the triumph of evil is for good men to do nothing. So, as a police officer, I have some urgent things to say to good people.
Day after day my men and I struggle to hold back a tidal wave of crime. Something has gone terribly wrong with our once-proud American way of life. It has happened in the area of values. A key ingredient is disappearing, and I think I know what it is: accountability.
Accountability isn't hard to define. It means that every person is responsible for his or her actions and liable for their consequences.
Of the many values that hold civilization together -- honesty, kindness, and so on -- accountability may be the most important of all. Without it, there can be no respect, no trust, no law -- and, ultimately, no society.
My job as a police officer is to impose accountability on people who refuse, or have never learned, to impose it on themselves. But as every policeman knows, external controls on people's behavior are far less effective than internal restraints such as guilt, shame and embarrassment.
Fortunately there are still communities -- smaller towns, usually -- where schools maintain discipline and where parents hold up standards that proclaim: "In this family certain things are not tolerated -- they simply are not done!"
Yet more and more, especially in our larger cities and suburbs, these inner restraints are loosening. Your typical robber has none. He considers your property his property; he takes what he wants, including your life if you enrage him.
The main cause of this break-down is a radical shift in attitudes. Thirty years ago, if a crime was committed, society was considered the victim. Now, in a shocking reversal, it's the criminal who is considered victimized: by his underprivileged upbringing, by the school that didn't teach him to read, by the church that failed to reach him with moral guidance, by the parents who didn't provide a stable home.
I don't believe it. Many others in equally disadvantaged circumstances choose not to engage in criminal activities. If we free the criminal, even partly, from accountability, we become a society of endless excuses where no one accepts responsibility for anything.
We in America desperately need more people who believe that the person who commits a crime is the one responsible for it. | 3673.txt | 1 |
[
"society is to be held responsible",
"modern civilization is responsible for it",
"the criminal himself should bear the blame",
"the standards of living should be improved"
] | According to the author, if a person is found guilty of a crime, . | A wise man once said that the only thing necessary for the triumph of evil is for good men to do nothing. So, as a police officer, I have some urgent things to say to good people.
Day after day my men and I struggle to hold back a tidal wave of crime. Something has gone terribly wrong with our once-proud American way of life. It has happened in the area of values. A key ingredient is disappearing, and I think I know what it is: accountability.
Accountability isn't hard to define. It means that every person is responsible for his or her actions and liable for their consequences.
Of the many values that hold civilization together -- honesty, kindness, and so on -- accountability may be the most important of all. Without it, there can be no respect, no trust, no law -- and, ultimately, no society.
My job as a police officer is to impose accountability on people who refuse, or have never learned, to impose it on themselves. But as every policeman knows, external controls on people's behavior are far less effective than internal restraints such as guilt, shame and embarrassment.
Fortunately there are still communities -- smaller towns, usually -- where schools maintain discipline and where parents hold up standards that proclaim: "In this family certain things are not tolerated -- they simply are not done!"
Yet more and more, especially in our larger cities and suburbs, these inner restraints are loosening. Your typical robber has none. He considers your property his property; he takes what he wants, including your life if you enrage him.
The main cause of this break-down is a radical shift in attitudes. Thirty years ago, if a crime was committed, society was considered the victim. Now, in a shocking reversal, it's the criminal who is considered victimized: by his underprivileged upbringing, by the school that didn't teach him to read, by the church that failed to reach him with moral guidance, by the parents who didn't provide a stable home.
I don't believe it. Many others in equally disadvantaged circumstances choose not to engage in criminal activities. If we free the criminal, even partly, from accountability, we become a society of endless excuses where no one accepts responsibility for anything.
We in America desperately need more people who believe that the person who commits a crime is the one responsible for it. | 3673.txt | 2 |
[
"less self-discipline",
"better sense of discipline",
"more mutual respect",
"less effective government"
] | Compared with those in small towns, people in large cities have . | A wise man once said that the only thing necessary for the triumph of evil is for good men to do nothing. So, as a police officer, I have some urgent things to say to good people.
Day after day my men and I struggle to hold back a tidal wave of crime. Something has gone terribly wrong with our once-proud American way of life. It has happened in the area of values. A key ingredient is disappearing, and I think I know what it is: accountability.
Accountability isn't hard to define. It means that every person is responsible for his or her actions and liable for their consequences.
Of the many values that hold civilization together -- honesty, kindness, and so on -- accountability may be the most important of all. Without it, there can be no respect, no trust, no law -- and, ultimately, no society.
My job as a police officer is to impose accountability on people who refuse, or have never learned, to impose it on themselves. But as every policeman knows, external controls on people's behavior are far less effective than internal restraints such as guilt, shame and embarrassment.
Fortunately there are still communities -- smaller towns, usually -- where schools maintain discipline and where parents hold up standards that proclaim: "In this family certain things are not tolerated -- they simply are not done!"
Yet more and more, especially in our larger cities and suburbs, these inner restraints are loosening. Your typical robber has none. He considers your property his property; he takes what he wants, including your life if you enrage him.
The main cause of this break-down is a radical shift in attitudes. Thirty years ago, if a crime was committed, society was considered the victim. Now, in a shocking reversal, it's the criminal who is considered victimized: by his underprivileged upbringing, by the school that didn't teach him to read, by the church that failed to reach him with moral guidance, by the parents who didn't provide a stable home.
I don't believe it. Many others in equally disadvantaged circumstances choose not to engage in criminal activities. If we free the criminal, even partly, from accountability, we become a society of endless excuses where no one accepts responsibility for anything.
We in America desperately need more people who believe that the person who commits a crime is the one responsible for it. | 3673.txt | 0 |
[
"people in large cities tend to excuse criminals",
"people in small towns still stick to old discipline and standards",
"today's society lacks sympathy for people in difficulty",
"people in disadvantaged circumstances are engaged in criminal activities"
] | The writer is sorry to have noticed that . | A wise man once said that the only thing necessary for the triumph of evil is for good men to do nothing. So, as a police officer, I have some urgent things to say to good people.
Day after day my men and I struggle to hold back a tidal wave of crime. Something has gone terribly wrong with our once-proud American way of life. It has happened in the area of values. A key ingredient is disappearing, and I think I know what it is: accountability.
Accountability isn't hard to define. It means that every person is responsible for his or her actions and liable for their consequences.
Of the many values that hold civilization together -- honesty, kindness, and so on -- accountability may be the most important of all. Without it, there can be no respect, no trust, no law -- and, ultimately, no society.
My job as a police officer is to impose accountability on people who refuse, or have never learned, to impose it on themselves. But as every policeman knows, external controls on people's behavior are far less effective than internal restraints such as guilt, shame and embarrassment.
Fortunately there are still communities -- smaller towns, usually -- where schools maintain discipline and where parents hold up standards that proclaim: "In this family certain things are not tolerated -- they simply are not done!"
Yet more and more, especially in our larger cities and suburbs, these inner restraints are loosening. Your typical robber has none. He considers your property his property; he takes what he wants, including your life if you enrage him.
The main cause of this break-down is a radical shift in attitudes. Thirty years ago, if a crime was committed, society was considered the victim. Now, in a shocking reversal, it's the criminal who is considered victimized: by his underprivileged upbringing, by the school that didn't teach him to read, by the church that failed to reach him with moral guidance, by the parents who didn't provide a stable home.
I don't believe it. Many others in equally disadvantaged circumstances choose not to engage in criminal activities. If we free the criminal, even partly, from accountability, we become a society of endless excuses where no one accepts responsibility for anything.
We in America desperately need more people who believe that the person who commits a crime is the one responsible for it. | 3673.txt | 0 |
[
"stricter discipline should be maintained in schools and families",
"more good examples should be set for people to follow",
"more restrictions should be imposed on people's behavior",
"more people should accept the value of accountability"
] | The key point of the passage is that . | A wise man once said that the only thing necessary for the triumph of evil is for good men to do nothing. So, as a police officer, I have some urgent things to say to good people.
Day after day my men and I struggle to hold back a tidal wave of crime. Something has gone terribly wrong with our once-proud American way of life. It has happened in the area of values. A key ingredient is disappearing, and I think I know what it is: accountability.
Accountability isn't hard to define. It means that every person is responsible for his or her actions and liable for their consequences.
Of the many values that hold civilization together -- honesty, kindness, and so on -- accountability may be the most important of all. Without it, there can be no respect, no trust, no law -- and, ultimately, no society.
My job as a police officer is to impose accountability on people who refuse, or have never learned, to impose it on themselves. But as every policeman knows, external controls on people's behavior are far less effective than internal restraints such as guilt, shame and embarrassment.
Fortunately there are still communities -- smaller towns, usually -- where schools maintain discipline and where parents hold up standards that proclaim: "In this family certain things are not tolerated -- they simply are not done!"
Yet more and more, especially in our larger cities and suburbs, these inner restraints are loosening. Your typical robber has none. He considers your property his property; he takes what he wants, including your life if you enrage him.
The main cause of this break-down is a radical shift in attitudes. Thirty years ago, if a crime was committed, society was considered the victim. Now, in a shocking reversal, it's the criminal who is considered victimized: by his underprivileged upbringing, by the school that didn't teach him to read, by the church that failed to reach him with moral guidance, by the parents who didn't provide a stable home.
I don't believe it. Many others in equally disadvantaged circumstances choose not to engage in criminal activities. If we free the criminal, even partly, from accountability, we become a society of endless excuses where no one accepts responsibility for anything.
We in America desperately need more people who believe that the person who commits a crime is the one responsible for it. | 3673.txt | 3 |
[
"predictable.",
"destructive.",
"lengthy.",
"unproductive."
] | The word "prolonged" in the passage is closest in meaning to | Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees and shrubs. They occur on a wide range of soil types and in extremes of climate. There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
Savannas typically experience a rather prolonged dry season. One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters, most of it falling in a five- to eight-month wet season. Though plenty of rain may fall on a savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses. Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas as well as coastal areas of Brazil and the island of Trinidad do not fit this pattern. In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme. For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high. Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils. This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas. More moderate conditions support moist forests.
Waterlogged soils occur in areas that are flat or have poor drainage. These soils usually contain large amounts of clay and easily become water saturated. Air cannot penetrate between the soil particles, making the soil oxygen-poor. By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly. Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor. Though most savannas are found on sites with poor soils (because of either moisture conditions or nutrient levels of both), poor soils can and do support lush rain forest.
Most savannas probably experience mild fires frequently and major burns every two years or so. Many savanna and dry-forest plant species are called pyrophytes, meaning they are adapted in various ways to withstand occasional burning. Frequent fire is a factor to which rain forest species seem unable to adapt, although ancient charcoal remains from Amazon forest soils dating prior to the arrival of humans suggest that moist forests also occasionally burn. Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly. When burning occurs, it prevents competition among plant species from progressing to the point where some species exclude others, reducing the overall diversity of the ecosystem. But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others. Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density. There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland. Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna. The thin thin upper layer of humus (decayed organic matter) is destroyed by cutting and burning. Humus is necessary for rapid decomposition of leaves by bacteria and fungi and for recycling by surface roots. Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation. Forests on white, sandy soil are most susceptible to permanent alteration. | 3847.txt | 2 |
[
"argue that these savannas are similar to those in South America and Cuba.",
"point out exceptions to the pattern of savanna formation in areas with drought stress.",
"provide additional examples of savannas in areas with five- to eight-month wet seasons.",
"indicate areas where savannas are being gradually replaced by rain forests."
] | In paragraph 2, the author mentions savannas in Central America, Brazil, and the island of Trinidad in order to | Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees and shrubs. They occur on a wide range of soil types and in extremes of climate. There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
Savannas typically experience a rather prolonged dry season. One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters, most of it falling in a five- to eight-month wet season. Though plenty of rain may fall on a savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses. Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas as well as coastal areas of Brazil and the island of Trinidad do not fit this pattern. In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme. For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high. Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils. This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas. More moderate conditions support moist forests.
Waterlogged soils occur in areas that are flat or have poor drainage. These soils usually contain large amounts of clay and easily become water saturated. Air cannot penetrate between the soil particles, making the soil oxygen-poor. By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly. Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor. Though most savannas are found on sites with poor soils (because of either moisture conditions or nutrient levels of both), poor soils can and do support lush rain forest.
Most savannas probably experience mild fires frequently and major burns every two years or so. Many savanna and dry-forest plant species are called pyrophytes, meaning they are adapted in various ways to withstand occasional burning. Frequent fire is a factor to which rain forest species seem unable to adapt, although ancient charcoal remains from Amazon forest soils dating prior to the arrival of humans suggest that moist forests also occasionally burn. Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly. When burning occurs, it prevents competition among plant species from progressing to the point where some species exclude others, reducing the overall diversity of the ecosystem. But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others. Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density. There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland. Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna. The thin thin upper layer of humus (decayed organic matter) is destroyed by cutting and burning. Humus is necessary for rapid decomposition of leaves by bacteria and fungi and for recycling by surface roots. Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation. Forests on white, sandy soil are most susceptible to permanent alteration. | 3847.txt | 1 |
[
"the soils in rain forests contain fewer minerals than savanna soils do.",
"savannas affect soil conditions more than rain forests do.",
"unlike rain forests, savannas prefer sandy, well-drained soils to soils that are very wet.",
"unlike rain forests, savannas may develop under both very dry and very wet soil conditions."
] | According to paragraph 3, rain forests and savannas differ in that | Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees and shrubs. They occur on a wide range of soil types and in extremes of climate. There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
Savannas typically experience a rather prolonged dry season. One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters, most of it falling in a five- to eight-month wet season. Though plenty of rain may fall on a savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses. Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas as well as coastal areas of Brazil and the island of Trinidad do not fit this pattern. In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme. For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high. Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils. This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas. More moderate conditions support moist forests.
Waterlogged soils occur in areas that are flat or have poor drainage. These soils usually contain large amounts of clay and easily become water saturated. Air cannot penetrate between the soil particles, making the soil oxygen-poor. By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly. Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor. Though most savannas are found on sites with poor soils (because of either moisture conditions or nutrient levels of both), poor soils can and do support lush rain forest.
Most savannas probably experience mild fires frequently and major burns every two years or so. Many savanna and dry-forest plant species are called pyrophytes, meaning they are adapted in various ways to withstand occasional burning. Frequent fire is a factor to which rain forest species seem unable to adapt, although ancient charcoal remains from Amazon forest soils dating prior to the arrival of humans suggest that moist forests also occasionally burn. Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly. When burning occurs, it prevents competition among plant species from progressing to the point where some species exclude others, reducing the overall diversity of the ecosystem. But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others. Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density. There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland. Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna. The thin thin upper layer of humus (decayed organic matter) is destroyed by cutting and burning. Humus is necessary for rapid decomposition of leaves by bacteria and fungi and for recycling by surface roots. Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation. Forests on white, sandy soil are most susceptible to permanent alteration. | 3847.txt | 3 |
[
"similarly.",
"especially.",
"usually.",
"relatively."
] | The word "notably" in the passage is closest in meaning to | Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees and shrubs. They occur on a wide range of soil types and in extremes of climate. There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
Savannas typically experience a rather prolonged dry season. One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters, most of it falling in a five- to eight-month wet season. Though plenty of rain may fall on a savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses. Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas as well as coastal areas of Brazil and the island of Trinidad do not fit this pattern. In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme. For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high. Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils. This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas. More moderate conditions support moist forests.
Waterlogged soils occur in areas that are flat or have poor drainage. These soils usually contain large amounts of clay and easily become water saturated. Air cannot penetrate between the soil particles, making the soil oxygen-poor. By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly. Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor. Though most savannas are found on sites with poor soils (because of either moisture conditions or nutrient levels of both), poor soils can and do support lush rain forest.
Most savannas probably experience mild fires frequently and major burns every two years or so. Many savanna and dry-forest plant species are called pyrophytes, meaning they are adapted in various ways to withstand occasional burning. Frequent fire is a factor to which rain forest species seem unable to adapt, although ancient charcoal remains from Amazon forest soils dating prior to the arrival of humans suggest that moist forests also occasionally burn. Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly. When burning occurs, it prevents competition among plant species from progressing to the point where some species exclude others, reducing the overall diversity of the ecosystem. But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others. Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density. There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland. Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna. The thin thin upper layer of humus (decayed organic matter) is destroyed by cutting and burning. Humus is necessary for rapid decomposition of leaves by bacteria and fungi and for recycling by surface roots. Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation. Forests on white, sandy soil are most susceptible to permanent alteration. | 3847.txt | 1 |
[
"They have high concentrations of potassium.",
"They contain high levels of aluminum.",
"They are very acidic.",
"They contain large amounts of certain oxide minerals."
] | According to paragraph 3, all of the following are true of savanna soils EXCEPT | Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees and shrubs. They occur on a wide range of soil types and in extremes of climate. There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
Savannas typically experience a rather prolonged dry season. One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters, most of it falling in a five- to eight-month wet season. Though plenty of rain may fall on a savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses. Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas as well as coastal areas of Brazil and the island of Trinidad do not fit this pattern. In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme. For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high. Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils. This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas. More moderate conditions support moist forests.
Waterlogged soils occur in areas that are flat or have poor drainage. These soils usually contain large amounts of clay and easily become water saturated. Air cannot penetrate between the soil particles, making the soil oxygen-poor. By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly. Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor. Though most savannas are found on sites with poor soils (because of either moisture conditions or nutrient levels of both), poor soils can and do support lush rain forest.
Most savannas probably experience mild fires frequently and major burns every two years or so. Many savanna and dry-forest plant species are called pyrophytes, meaning they are adapted in various ways to withstand occasional burning. Frequent fire is a factor to which rain forest species seem unable to adapt, although ancient charcoal remains from Amazon forest soils dating prior to the arrival of humans suggest that moist forests also occasionally burn. Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly. When burning occurs, it prevents competition among plant species from progressing to the point where some species exclude others, reducing the overall diversity of the ecosystem. But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others. Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density. There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland. Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna. The thin thin upper layer of humus (decayed organic matter) is destroyed by cutting and burning. Humus is necessary for rapid decomposition of leaves by bacteria and fungi and for recycling by surface roots. Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation. Forests on white, sandy soil are most susceptible to permanent alteration. | 3847.txt | 0 |
[
"Their upper layers are usually sandy and porous.",
"They cannot support savannas.",
"They contain little oxygen.",
"They are prone to the leaching of nutrients and minerals."
] | According to paragraph 4, which of the following is true of waterlogged soils? | Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees and shrubs. They occur on a wide range of soil types and in extremes of climate. There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
Savannas typically experience a rather prolonged dry season. One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters, most of it falling in a five- to eight-month wet season. Though plenty of rain may fall on a savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses. Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas as well as coastal areas of Brazil and the island of Trinidad do not fit this pattern. In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme. For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high. Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils. This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas. More moderate conditions support moist forests.
Waterlogged soils occur in areas that are flat or have poor drainage. These soils usually contain large amounts of clay and easily become water saturated. Air cannot penetrate between the soil particles, making the soil oxygen-poor. By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly. Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor. Though most savannas are found on sites with poor soils (because of either moisture conditions or nutrient levels of both), poor soils can and do support lush rain forest.
Most savannas probably experience mild fires frequently and major burns every two years or so. Many savanna and dry-forest plant species are called pyrophytes, meaning they are adapted in various ways to withstand occasional burning. Frequent fire is a factor to which rain forest species seem unable to adapt, although ancient charcoal remains from Amazon forest soils dating prior to the arrival of humans suggest that moist forests also occasionally burn. Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly. When burning occurs, it prevents competition among plant species from progressing to the point where some species exclude others, reducing the overall diversity of the ecosystem. But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others. Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density. There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland. Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna. The thin thin upper layer of humus (decayed organic matter) is destroyed by cutting and burning. Humus is necessary for rapid decomposition of leaves by bacteria and fungi and for recycling by surface roots. Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation. Forests on white, sandy soil are most susceptible to permanent alteration. | 3847.txt | 2 |
[
"poor soils alone may not be enough to explain why an area becomes a savanna.",
"rain forest vegetation can significantly lower the quality of soils.",
"drought stress is the single most important factor in savanna formation.",
"minerals are more important than moisture for the growth of trees."
] | The fact that "poor soils can and do support lush rain forest" suggests that | Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees and shrubs. They occur on a wide range of soil types and in extremes of climate. There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
Savannas typically experience a rather prolonged dry season. One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters, most of it falling in a five- to eight-month wet season. Though plenty of rain may fall on a savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses. Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas as well as coastal areas of Brazil and the island of Trinidad do not fit this pattern. In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme. For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high. Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils. This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas. More moderate conditions support moist forests.
Waterlogged soils occur in areas that are flat or have poor drainage. These soils usually contain large amounts of clay and easily become water saturated. Air cannot penetrate between the soil particles, making the soil oxygen-poor. By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly. Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor. Though most savannas are found on sites with poor soils (because of either moisture conditions or nutrient levels of both), poor soils can and do support lush rain forest.
Most savannas probably experience mild fires frequently and major burns every two years or so. Many savanna and dry-forest plant species are called pyrophytes, meaning they are adapted in various ways to withstand occasional burning. Frequent fire is a factor to which rain forest species seem unable to adapt, although ancient charcoal remains from Amazon forest soils dating prior to the arrival of humans suggest that moist forests also occasionally burn. Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly. When burning occurs, it prevents competition among plant species from progressing to the point where some species exclude others, reducing the overall diversity of the ecosystem. But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others. Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density. There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland. Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna. The thin thin upper layer of humus (decayed organic matter) is destroyed by cutting and burning. Humus is necessary for rapid decomposition of leaves by bacteria and fungi and for recycling by surface roots. Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation. Forests on white, sandy soil are most susceptible to permanent alteration. | 3847.txt | 0 |
[
"dangerously.",
"noticeably.",
"rapidly.",
"gradually."
] | The word "markedly" in the passage is closest in meaning to | Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees and shrubs. They occur on a wide range of soil types and in extremes of climate. There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
Savannas typically experience a rather prolonged dry season. One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters, most of it falling in a five- to eight-month wet season. Though plenty of rain may fall on a savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses. Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas as well as coastal areas of Brazil and the island of Trinidad do not fit this pattern. In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme. For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high. Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils. This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas. More moderate conditions support moist forests.
Waterlogged soils occur in areas that are flat or have poor drainage. These soils usually contain large amounts of clay and easily become water saturated. Air cannot penetrate between the soil particles, making the soil oxygen-poor. By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly. Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor. Though most savannas are found on sites with poor soils (because of either moisture conditions or nutrient levels of both), poor soils can and do support lush rain forest.
Most savannas probably experience mild fires frequently and major burns every two years or so. Many savanna and dry-forest plant species are called pyrophytes, meaning they are adapted in various ways to withstand occasional burning. Frequent fire is a factor to which rain forest species seem unable to adapt, although ancient charcoal remains from Amazon forest soils dating prior to the arrival of humans suggest that moist forests also occasionally burn. Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly. When burning occurs, it prevents competition among plant species from progressing to the point where some species exclude others, reducing the overall diversity of the ecosystem. But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others. Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density. There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland. Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna. The thin thin upper layer of humus (decayed organic matter) is destroyed by cutting and burning. Humus is necessary for rapid decomposition of leaves by bacteria and fungi and for recycling by surface roots. Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation. Forests on white, sandy soil are most susceptible to permanent alteration. | 3847.txt | 1 |
[
"Fires prevent the growth of pyrophytes.",
"Fires eliminate some species and thus reduce the overall diversity of the ecosystem.",
"Fires that occur once every two years are unlikely to help maintain savannas.",
"Fires prevent some species from eliminating other species with which they compete."
] | Paragraph 5 supports which of the following statements regarding the importance of fires in maintaining savannas? | Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees and shrubs. They occur on a wide range of soil types and in extremes of climate. There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
Savannas typically experience a rather prolonged dry season. One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters, most of it falling in a five- to eight-month wet season. Though plenty of rain may fall on a savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses. Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas as well as coastal areas of Brazil and the island of Trinidad do not fit this pattern. In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme. For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high. Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils. This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas. More moderate conditions support moist forests.
Waterlogged soils occur in areas that are flat or have poor drainage. These soils usually contain large amounts of clay and easily become water saturated. Air cannot penetrate between the soil particles, making the soil oxygen-poor. By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly. Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor. Though most savannas are found on sites with poor soils (because of either moisture conditions or nutrient levels of both), poor soils can and do support lush rain forest.
Most savannas probably experience mild fires frequently and major burns every two years or so. Many savanna and dry-forest plant species are called pyrophytes, meaning they are adapted in various ways to withstand occasional burning. Frequent fire is a factor to which rain forest species seem unable to adapt, although ancient charcoal remains from Amazon forest soils dating prior to the arrival of humans suggest that moist forests also occasionally burn. Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly. When burning occurs, it prevents competition among plant species from progressing to the point where some species exclude others, reducing the overall diversity of the ecosystem. But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others. Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density. There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland. Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna. The thin thin upper layer of humus (decayed organic matter) is destroyed by cutting and burning. Humus is necessary for rapid decomposition of leaves by bacteria and fungi and for recycling by surface roots. Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation. Forests on white, sandy soil are most susceptible to permanent alteration. | 3847.txt | 3 |
[
"expanded in area.",
"harmful.",
"following in time.",
"repeated."
] | The word "subsequent" in the passage is closest in meaning to | Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees and shrubs. They occur on a wide range of soil types and in extremes of climate. There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
Savannas typically experience a rather prolonged dry season. One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters, most of it falling in a five- to eight-month wet season. Though plenty of rain may fall on a savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses. Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas as well as coastal areas of Brazil and the island of Trinidad do not fit this pattern. In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme. For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high. Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils. This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas. More moderate conditions support moist forests.
Waterlogged soils occur in areas that are flat or have poor drainage. These soils usually contain large amounts of clay and easily become water saturated. Air cannot penetrate between the soil particles, making the soil oxygen-poor. By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly. Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor. Though most savannas are found on sites with poor soils (because of either moisture conditions or nutrient levels of both), poor soils can and do support lush rain forest.
Most savannas probably experience mild fires frequently and major burns every two years or so. Many savanna and dry-forest plant species are called pyrophytes, meaning they are adapted in various ways to withstand occasional burning. Frequent fire is a factor to which rain forest species seem unable to adapt, although ancient charcoal remains from Amazon forest soils dating prior to the arrival of humans suggest that moist forests also occasionally burn. Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly. When burning occurs, it prevents competition among plant species from progressing to the point where some species exclude others, reducing the overall diversity of the ecosystem. But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others. Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density. There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland. Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna. The thin thin upper layer of humus (decayed organic matter) is destroyed by cutting and burning. Humus is necessary for rapid decomposition of leaves by bacteria and fungi and for recycling by surface roots. Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation. Forests on white, sandy soil are most susceptible to permanent alteration. | 3847.txt | 2 |
[
"Decomposition of leaves occurs too fast for surface roots to obtain nutrients.",
"Nutrients are not recycled.",
"Humus is destroyed.",
"Certain soils become unable to support vegetation other than savanna vegetation."
] | According to paragraph 6, human activity affects soils in all of the following ways EXCEPT | Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees and shrubs. They occur on a wide range of soil types and in extremes of climate. There is no simple or single factor that determines if a given site will be a savanna, but some factors seem to play important roles in their formation.
Savannas typically experience a rather prolonged dry season. One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site. Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters, most of it falling in a five- to eight-month wet season. Though plenty of rain may fall on a savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses. Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas as well as coastal areas of Brazil and the island of Trinidad do not fit this pattern. In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme. For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high. Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils. This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas. More moderate conditions support moist forests.
Waterlogged soils occur in areas that are flat or have poor drainage. These soils usually contain large amounts of clay and easily become water saturated. Air cannot penetrate between the soil particles, making the soil oxygen-poor. By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly. Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor. Though most savannas are found on sites with poor soils (because of either moisture conditions or nutrient levels of both), poor soils can and do support lush rain forest.
Most savannas probably experience mild fires frequently and major burns every two years or so. Many savanna and dry-forest plant species are called pyrophytes, meaning they are adapted in various ways to withstand occasional burning. Frequent fire is a factor to which rain forest species seem unable to adapt, although ancient charcoal remains from Amazon forest soils dating prior to the arrival of humans suggest that moist forests also occasionally burn. Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly. When burning occurs, it prevents competition among plant species from progressing to the point where some species exclude others, reducing the overall diversity of the ecosystem. But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others. Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density. There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland. Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna. The thin thin upper layer of humus (decayed organic matter) is destroyed by cutting and burning. Humus is necessary for rapid decomposition of leaves by bacteria and fungi and for recycling by surface roots. Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation. Forests on white, sandy soil are most susceptible to permanent alteration. | 3847.txt | 0 |
[
"The parts of a neuron",
"The structure of animals' nerve",
"The nervous system of vertebrates",
"The development of the brain"
] | What does the passage mainly discuss? | The nervous system of vertebrates is characterized by a hollow, dorsal nerve cord that ends in the head region as an enlargement, the brain. Even in its most primitive form this cord and its attached nerves are the result of evolutionary specialization, and their further evolution from lower to higher vertebrate classes is a process that is far from fully understood. Nevertheless, the basic arrangements are similar in all vertebrates, and the study of lower animals gives insight into the form and structure of the nervous system of higher animals. Moreover, for any species, the study of the embryological development of the nervous system is indispensable for an understanding of adult morphology.
In any vertebrate two chief parts of the nervous system may be distinguished. These are the central nervous system (the nerve cord mentions above), consisting of the brain and spinal cord, and the peripheral nervous system, consisting of the cranial, spinal, and peripheral nerves, together with their motor and sensory endings. The term "autonomic nervous system" refers to the parts of the central and peripheral systems that supply and regulate the activity of cardiac muscle, smooth muscle, and many glands.
The nervous system is composed of many millions of nerve and glial cells, together with blood vessels and a small amount of connective tissue. The nerve cells, or "neurons", are characterized by many processes and are specialized in that they exhibit to a great degree the phenomena of irritability and conductivity. The glial cells of the central nervous system are supporting cells collectively termed "neuroglia". They are characterized by short processes that have special relationships to neurons, blood vessels, and connective tissue. The comparable cells in the peripheral nervous system are termed "neurilemmal" cells. | 1703.txt | 2 |
[
"large",
"hollow",
"primitive",
"embryological"
] | According to the passage , the nerve cord of vertebrates is | The nervous system of vertebrates is characterized by a hollow, dorsal nerve cord that ends in the head region as an enlargement, the brain. Even in its most primitive form this cord and its attached nerves are the result of evolutionary specialization, and their further evolution from lower to higher vertebrate classes is a process that is far from fully understood. Nevertheless, the basic arrangements are similar in all vertebrates, and the study of lower animals gives insight into the form and structure of the nervous system of higher animals. Moreover, for any species, the study of the embryological development of the nervous system is indispensable for an understanding of adult morphology.
In any vertebrate two chief parts of the nervous system may be distinguished. These are the central nervous system (the nerve cord mentions above), consisting of the brain and spinal cord, and the peripheral nervous system, consisting of the cranial, spinal, and peripheral nerves, together with their motor and sensory endings. The term "autonomic nervous system" refers to the parts of the central and peripheral systems that supply and regulate the activity of cardiac muscle, smooth muscle, and many glands.
The nervous system is composed of many millions of nerve and glial cells, together with blood vessels and a small amount of connective tissue. The nerve cells, or "neurons", are characterized by many processes and are specialized in that they exhibit to a great degree the phenomena of irritability and conductivity. The glial cells of the central nervous system are supporting cells collectively termed "neuroglia". They are characterized by short processes that have special relationships to neurons, blood vessels, and connective tissue. The comparable cells in the peripheral nervous system are termed "neurilemmal" cells. | 1703.txt | 1 |
[
"Improved research of the same structure in other species",
"A better understanding of the fully developed structure",
"Discovering ways in which poor development can be corrected",
"A method by which scientists can document the various stages of development"
] | The author implies that a careful investigation of a biological structure in an embryo may | The nervous system of vertebrates is characterized by a hollow, dorsal nerve cord that ends in the head region as an enlargement, the brain. Even in its most primitive form this cord and its attached nerves are the result of evolutionary specialization, and their further evolution from lower to higher vertebrate classes is a process that is far from fully understood. Nevertheless, the basic arrangements are similar in all vertebrates, and the study of lower animals gives insight into the form and structure of the nervous system of higher animals. Moreover, for any species, the study of the embryological development of the nervous system is indispensable for an understanding of adult morphology.
In any vertebrate two chief parts of the nervous system may be distinguished. These are the central nervous system (the nerve cord mentions above), consisting of the brain and spinal cord, and the peripheral nervous system, consisting of the cranial, spinal, and peripheral nerves, together with their motor and sensory endings. The term "autonomic nervous system" refers to the parts of the central and peripheral systems that supply and regulate the activity of cardiac muscle, smooth muscle, and many glands.
The nervous system is composed of many millions of nerve and glial cells, together with blood vessels and a small amount of connective tissue. The nerve cells, or "neurons", are characterized by many processes and are specialized in that they exhibit to a great degree the phenomena of irritability and conductivity. The glial cells of the central nervous system are supporting cells collectively termed "neuroglia". They are characterized by short processes that have special relationships to neurons, blood vessels, and connective tissue. The comparable cells in the peripheral nervous system are termed "neurilemmal" cells. | 1703.txt | 1 |
[
"sensory endings",
"cranial nerve",
"spinal cord",
"peripheral nerves"
] | The two main parts of the central nervous system are the brain and the | The nervous system of vertebrates is characterized by a hollow, dorsal nerve cord that ends in the head region as an enlargement, the brain. Even in its most primitive form this cord and its attached nerves are the result of evolutionary specialization, and their further evolution from lower to higher vertebrate classes is a process that is far from fully understood. Nevertheless, the basic arrangements are similar in all vertebrates, and the study of lower animals gives insight into the form and structure of the nervous system of higher animals. Moreover, for any species, the study of the embryological development of the nervous system is indispensable for an understanding of adult morphology.
In any vertebrate two chief parts of the nervous system may be distinguished. These are the central nervous system (the nerve cord mentions above), consisting of the brain and spinal cord, and the peripheral nervous system, consisting of the cranial, spinal, and peripheral nerves, together with their motor and sensory endings. The term "autonomic nervous system" refers to the parts of the central and peripheral systems that supply and regulate the activity of cardiac muscle, smooth muscle, and many glands.
The nervous system is composed of many millions of nerve and glial cells, together with blood vessels and a small amount of connective tissue. The nerve cells, or "neurons", are characterized by many processes and are specialized in that they exhibit to a great degree the phenomena of irritability and conductivity. The glial cells of the central nervous system are supporting cells collectively termed "neuroglia". They are characterized by short processes that have special relationships to neurons, blood vessels, and connective tissue. The comparable cells in the peripheral nervous system are termed "neurilemmal" cells. | 1703.txt | 2 |
[
"connective tissue",
"cardiac muscle",
"glandular activity",
"smooth muscle"
] | All of the following are described as being controlled by the autonomic nervous system EXCEPT | The nervous system of vertebrates is characterized by a hollow, dorsal nerve cord that ends in the head region as an enlargement, the brain. Even in its most primitive form this cord and its attached nerves are the result of evolutionary specialization, and their further evolution from lower to higher vertebrate classes is a process that is far from fully understood. Nevertheless, the basic arrangements are similar in all vertebrates, and the study of lower animals gives insight into the form and structure of the nervous system of higher animals. Moreover, for any species, the study of the embryological development of the nervous system is indispensable for an understanding of adult morphology.
In any vertebrate two chief parts of the nervous system may be distinguished. These are the central nervous system (the nerve cord mentions above), consisting of the brain and spinal cord, and the peripheral nervous system, consisting of the cranial, spinal, and peripheral nerves, together with their motor and sensory endings. The term "autonomic nervous system" refers to the parts of the central and peripheral systems that supply and regulate the activity of cardiac muscle, smooth muscle, and many glands.
The nervous system is composed of many millions of nerve and glial cells, together with blood vessels and a small amount of connective tissue. The nerve cells, or "neurons", are characterized by many processes and are specialized in that they exhibit to a great degree the phenomena of irritability and conductivity. The glial cells of the central nervous system are supporting cells collectively termed "neuroglia". They are characterized by short processes that have special relationships to neurons, blood vessels, and connective tissue. The comparable cells in the peripheral nervous system are termed "neurilemmal" cells. | 1703.txt | 0 |
[
"lines 1-2",
"lines 9-12",
"lines 12-14",
"lines 16-18"
] | In what lines does the author identify certain characteristic of nerve cells? | The nervous system of vertebrates is characterized by a hollow, dorsal nerve cord that ends in the head region as an enlargement, the brain. Even in its most primitive form this cord and its attached nerves are the result of evolutionary specialization, and their further evolution from lower to higher vertebrate classes is a process that is far from fully understood. Nevertheless, the basic arrangements are similar in all vertebrates, and the study of lower animals gives insight into the form and structure of the nervous system of higher animals. Moreover, for any species, the study of the embryological development of the nervous system is indispensable for an understanding of adult morphology.
In any vertebrate two chief parts of the nervous system may be distinguished. These are the central nervous system (the nerve cord mentions above), consisting of the brain and spinal cord, and the peripheral nervous system, consisting of the cranial, spinal, and peripheral nerves, together with their motor and sensory endings. The term "autonomic nervous system" refers to the parts of the central and peripheral systems that supply and regulate the activity of cardiac muscle, smooth muscle, and many glands.
The nervous system is composed of many millions of nerve and glial cells, together with blood vessels and a small amount of connective tissue. The nerve cells, or "neurons", are characterized by many processes and are specialized in that they exhibit to a great degree the phenomena of irritability and conductivity. The glial cells of the central nervous system are supporting cells collectively termed "neuroglia". They are characterized by short processes that have special relationships to neurons, blood vessels, and connective tissue. The comparable cells in the peripheral nervous system are termed "neurilemmal" cells. | 1703.txt | 3 |
[
"not worthy of special treatment",
"not provided with proper service",
"considered to be inferior members of society",
"regarded as privileged"
] | The author feels that nowadays customers are ________. | I have had just about enough of being treated like a second-class citizen, simply because I happened to be that put upon member of society-a customer. The more I go into shops and hotels, banks and post offices, railway stations, airports and the like, the more I'm convinced that things are being run solely to suit the firm, the system, or the union. There seems to be a new motto for the so-called ‘service' organization-Staff Before Service. How often, for example, have you queued for what seems like hours at the Post Office or the supermarket because there aren't enough staff on duty at all the service counters? Surely in these days of high unemployment it must be possible to increase counter staff. Yet supermarkets, hinting darkly at higher prices, claim that bringing all their cash registers into operation at any time would increase expenses. And the Post Office says we cannot expect all their service counters to be occupied ‘at times when demand is low'.
It's the same with hotels. Because waiters and kitchen staff must finish when it suits them, dining rooms close earlier or menu choice is diminished. As for us guests (and how the meaning of that word has been cut away little by little), we just have to put up with it. There's also the nonsense of so many friendly hotel night porters having been gradually with drawn from service in the interests of ‘efficiency' (i.e. profits) and replaced by coin-eating machines which supply everything from beer to medicine, not to mention the creeping threat of the tea-making set in your room: a kettle with teabags, milk bags sugar. Who wants to wake up to a raw teabag? I don't, especially when I am paying for ‘service'.
Our only hope is to hammer our irritation whenever and wherever we can and, if all else fails, restore that other, older saying-Take Our Custom Elsewhere. | 1008.txt | 3 |
[
"the staff are less considerate than employers",
"customers are becoming more demanding",
"customers unwilling to pay extra money",
"more consideration is given to the staff than customers"
] | In the author's opinion, the quality of service is changing because ________. | I have had just about enough of being treated like a second-class citizen, simply because I happened to be that put upon member of society-a customer. The more I go into shops and hotels, banks and post offices, railway stations, airports and the like, the more I'm convinced that things are being run solely to suit the firm, the system, or the union. There seems to be a new motto for the so-called ‘service' organization-Staff Before Service. How often, for example, have you queued for what seems like hours at the Post Office or the supermarket because there aren't enough staff on duty at all the service counters? Surely in these days of high unemployment it must be possible to increase counter staff. Yet supermarkets, hinting darkly at higher prices, claim that bringing all their cash registers into operation at any time would increase expenses. And the Post Office says we cannot expect all their service counters to be occupied ‘at times when demand is low'.
It's the same with hotels. Because waiters and kitchen staff must finish when it suits them, dining rooms close earlier or menu choice is diminished. As for us guests (and how the meaning of that word has been cut away little by little), we just have to put up with it. There's also the nonsense of so many friendly hotel night porters having been gradually with drawn from service in the interests of ‘efficiency' (i.e. profits) and replaced by coin-eating machines which supply everything from beer to medicine, not to mention the creeping threat of the tea-making set in your room: a kettle with teabags, milk bags sugar. Who wants to wake up to a raw teabag? I don't, especially when I am paying for ‘service'.
Our only hope is to hammer our irritation whenever and wherever we can and, if all else fails, restore that other, older saying-Take Our Custom Elsewhere. | 1008.txt | 2 |
[
"the diminishing supply of good staff",
"lack of cooperation among staff",
"inefficient staff",
"deliberate understaffing"
] | According to the author, long queues at counters are caused by ________. | I have had just about enough of being treated like a second-class citizen, simply because I happened to be that put upon member of society-a customer. The more I go into shops and hotels, banks and post offices, railway stations, airports and the like, the more I'm convinced that things are being run solely to suit the firm, the system, or the union. There seems to be a new motto for the so-called ‘service' organization-Staff Before Service. How often, for example, have you queued for what seems like hours at the Post Office or the supermarket because there aren't enough staff on duty at all the service counters? Surely in these days of high unemployment it must be possible to increase counter staff. Yet supermarkets, hinting darkly at higher prices, claim that bringing all their cash registers into operation at any time would increase expenses. And the Post Office says we cannot expect all their service counters to be occupied ‘at times when demand is low'.
It's the same with hotels. Because waiters and kitchen staff must finish when it suits them, dining rooms close earlier or menu choice is diminished. As for us guests (and how the meaning of that word has been cut away little by little), we just have to put up with it. There's also the nonsense of so many friendly hotel night porters having been gradually with drawn from service in the interests of ‘efficiency' (i.e. profits) and replaced by coin-eating machines which supply everything from beer to medicine, not to mention the creeping threat of the tea-making set in your room: a kettle with teabags, milk bags sugar. Who wants to wake up to a raw teabag? I don't, especially when I am paying for ‘service'.
Our only hope is to hammer our irritation whenever and wherever we can and, if all else fails, restore that other, older saying-Take Our Custom Elsewhere. | 1008.txt | 1 |
[
"self-service provides a cheaper alternative",
"the personal touch is less appreciated nowadays",
"machines are more reliable than human beings",
"few people are willing to do this type of work"
] | The disappearance of old-style hotel porters can be attributed to the fact that ________. | I have had just about enough of being treated like a second-class citizen, simply because I happened to be that put upon member of society-a customer. The more I go into shops and hotels, banks and post offices, railway stations, airports and the like, the more I'm convinced that things are being run solely to suit the firm, the system, or the union. There seems to be a new motto for the so-called ‘service' organization-Staff Before Service. How often, for example, have you queued for what seems like hours at the Post Office or the supermarket because there aren't enough staff on duty at all the service counters? Surely in these days of high unemployment it must be possible to increase counter staff. Yet supermarkets, hinting darkly at higher prices, claim that bringing all their cash registers into operation at any time would increase expenses. And the Post Office says we cannot expect all their service counters to be occupied ‘at times when demand is low'.
It's the same with hotels. Because waiters and kitchen staff must finish when it suits them, dining rooms close earlier or menu choice is diminished. As for us guests (and how the meaning of that word has been cut away little by little), we just have to put up with it. There's also the nonsense of so many friendly hotel night porters having been gradually with drawn from service in the interests of ‘efficiency' (i.e. profits) and replaced by coin-eating machines which supply everything from beer to medicine, not to mention the creeping threat of the tea-making set in your room: a kettle with teabags, milk bags sugar. Who wants to wake up to a raw teabag? I don't, especially when I am paying for ‘service'.
Our only hope is to hammer our irritation whenever and wherever we can and, if all else fails, restore that other, older saying-Take Our Custom Elsewhere. | 1008.txt | 0 |
[
"to put up with whatever service is provided",
"to make strong complaints wherever necessary",
"to fully utilize all kinds of coin-eating machines",
"to go where good service is available"
] | The author's final solution to the problem discussed in the passage is ________. | I have had just about enough of being treated like a second-class citizen, simply because I happened to be that put upon member of society-a customer. The more I go into shops and hotels, banks and post offices, railway stations, airports and the like, the more I'm convinced that things are being run solely to suit the firm, the system, or the union. There seems to be a new motto for the so-called ‘service' organization-Staff Before Service. How often, for example, have you queued for what seems like hours at the Post Office or the supermarket because there aren't enough staff on duty at all the service counters? Surely in these days of high unemployment it must be possible to increase counter staff. Yet supermarkets, hinting darkly at higher prices, claim that bringing all their cash registers into operation at any time would increase expenses. And the Post Office says we cannot expect all their service counters to be occupied ‘at times when demand is low'.
It's the same with hotels. Because waiters and kitchen staff must finish when it suits them, dining rooms close earlier or menu choice is diminished. As for us guests (and how the meaning of that word has been cut away little by little), we just have to put up with it. There's also the nonsense of so many friendly hotel night porters having been gradually with drawn from service in the interests of ‘efficiency' (i.e. profits) and replaced by coin-eating machines which supply everything from beer to medicine, not to mention the creeping threat of the tea-making set in your room: a kettle with teabags, milk bags sugar. Who wants to wake up to a raw teabag? I don't, especially when I am paying for ‘service'.
Our only hope is to hammer our irritation whenever and wherever we can and, if all else fails, restore that other, older saying-Take Our Custom Elsewhere. | 1008.txt | 2 |
[
"could be regulated by a timepiece such as a clock or a watch",
"could be managed by the internal clock of human bodies",
"should be well managed for our own interest",
"should be saved for outside interests"
] | The author intends to tell us that time. | What time is it? Most people are pretty accurate in their answer.And if you
don't know for sure,it's very likely that you can find out.There may be a watch on your wrist;there may be a clock on the wall,desk,or computer screen;or maybe you're riding in a car that has a clock in the dashboard.
Even if you don't have a timepiece of some sort nearby,your body keeps its own beat.Humans have an internal clock that regulates the beating of our heart,the pace of our breathing,the discharge of chemicals within our bloodstream,and many other bodily functions.
Time is something from which we can't escape.Even if we ignore it,it's still going by,ticking away,second by second,minute by minute,hour by hour.So the main issue in using your time well is,"Who's in charge?" We can allow time to slip by and let it be our enemy.Or we can take control of it and make it our ally.
By taking control of how you spend your time,you'll increase your chances of becoming a more successful student.Perhaps more importantly,the better you are at managing the time you devote to your studies,the more time you will have to spend on your outside interests.
The aim of time management is not to schedule every moment so we become slaves of a timetable that governs every waking moment of the day.Instead,the aim is to permit us to make informed choices as to how we use our time.Rather than letting the day go by,largely without our awareness,what we are going to discuss next can make us better able to control time for our own purposes. | 3472.txt | 2 |
[
"how to keep up with the times",
"how to make up for lost time",
"how to have a good time",
"how to make good use of time"
] | In the next part,the author would most probably discuss with you. | What time is it? Most people are pretty accurate in their answer.And if you
don't know for sure,it's very likely that you can find out.There may be a watch on your wrist;there may be a clock on the wall,desk,or computer screen;or maybe you're riding in a car that has a clock in the dashboard.
Even if you don't have a timepiece of some sort nearby,your body keeps its own beat.Humans have an internal clock that regulates the beating of our heart,the pace of our breathing,the discharge of chemicals within our bloodstream,and many other bodily functions.
Time is something from which we can't escape.Even if we ignore it,it's still going by,ticking away,second by second,minute by minute,hour by hour.So the main issue in using your time well is,"Who's in charge?" We can allow time to slip by and let it be our enemy.Or we can take control of it and make it our ally.
By taking control of how you spend your time,you'll increase your chances of becoming a more successful student.Perhaps more importantly,the better you are at managing the time you devote to your studies,the more time you will have to spend on your outside interests.
The aim of time management is not to schedule every moment so we become slaves of a timetable that governs every waking moment of the day.Instead,the aim is to permit us to make informed choices as to how we use our time.Rather than letting the day go by,largely without our awareness,what we are going to discuss next can make us better able to control time for our own purposes. | 3472.txt | 3 |
[
"building roads without modern machines was Roman soldiers'only job",
"it was no easy job for the Romans to build their roads",
"people in advanced countries still use the old Roman way to build their roads today",
"most people in the African countries still use the old Roman way to dig their tunnels through the mountains"
] | The story tells us _ . | Over two thousand years ago Romewas the center of a huge empire. The Romans needed a way to move their large armies quickly so that they could protect their huge country. They needed land trade routes, so they joined all parts of their empire by a net-work of roads.
Beginning in 300
B.C., the Romans built roads in Europe, Asia and North Africa. By 200A.D., they had built 50, 000 miles of almost straight roads.
To build their roads, the Romans moved away all soft soil. They dug until they reached hard ground. Then they added layersof stone and other things. The most important roads were pavedwith large flatstones. Main Roman roads were sometimes as wide as ours today.
To build their roads, the Romans sometimes had to dig tunnels through mountains. But they didn't have any machines to help them. So they heated the rock with fire and then threw cold water over it. When the rock cracked, they dug it out. Roman soldiers and slaves built the roads with their hands and simple tools, but the roads were so well built that they were used for hundreds of years. | 2482.txt | 1 |
[
"explode the rock before they started to dig",
"crack the rock with fire and cold water",
"dig through the hard rock with their hands",
"invent some machines to help them with the work"
] | To build mountain roads, the old Romans had to _ . | Over two thousand years ago Romewas the center of a huge empire. The Romans needed a way to move their large armies quickly so that they could protect their huge country. They needed land trade routes, so they joined all parts of their empire by a net-work of roads.
Beginning in 300
B.C., the Romans built roads in Europe, Asia and North Africa. By 200A.D., they had built 50, 000 miles of almost straight roads.
To build their roads, the Romans moved away all soft soil. They dug until they reached hard ground. Then they added layersof stone and other things. The most important roads were pavedwith large flatstones. Main Roman roads were sometimes as wide as ours today.
To build their roads, the Romans sometimes had to dig tunnels through mountains. But they didn't have any machines to help them. So they heated the rock with fire and then threw cold water over it. When the rock cracked, they dug it out. Roman soldiers and slaves built the roads with their hands and simple tools, but the roads were so well built that they were used for hundreds of years. | 2482.txt | 1 |
[
"how to build up our modern roads today",
"Roman tools in building a wide straight road",
"the Romans‘ roads built two thousand years ago",
"the reason why the Romans had to build their roads"
] | On the whole, the story is about _ . | Over two thousand years ago Romewas the center of a huge empire. The Romans needed a way to move their large armies quickly so that they could protect their huge country. They needed land trade routes, so they joined all parts of their empire by a net-work of roads.
Beginning in 300
B.C., the Romans built roads in Europe, Asia and North Africa. By 200A.D., they had built 50, 000 miles of almost straight roads.
To build their roads, the Romans moved away all soft soil. They dug until they reached hard ground. Then they added layersof stone and other things. The most important roads were pavedwith large flatstones. Main Roman roads were sometimes as wide as ours today.
To build their roads, the Romans sometimes had to dig tunnels through mountains. But they didn't have any machines to help them. So they heated the rock with fire and then threw cold water over it. When the rock cracked, they dug it out. Roman soldiers and slaves built the roads with their hands and simple tools, but the roads were so well built that they were used for hundreds of years. | 2482.txt | 2 |
[
"their slaves and soldiers had to do something, or, they would have nothing to do",
"they dared not sail in the ocean and the roads were their only choice",
"they needed land trade roads and the roads to move their grand armies as quickly as possible",
"the old Romans wanted to show how clever they were in building the roads"
] | Why did the Romans build so many roads at that time? It was because _ . | Over two thousand years ago Romewas the center of a huge empire. The Romans needed a way to move their large armies quickly so that they could protect their huge country. They needed land trade routes, so they joined all parts of their empire by a net-work of roads.
Beginning in 300
B.C., the Romans built roads in Europe, Asia and North Africa. By 200A.D., they had built 50, 000 miles of almost straight roads.
To build their roads, the Romans moved away all soft soil. They dug until they reached hard ground. Then they added layersof stone and other things. The most important roads were pavedwith large flatstones. Main Roman roads were sometimes as wide as ours today.
To build their roads, the Romans sometimes had to dig tunnels through mountains. But they didn't have any machines to help them. So they heated the rock with fire and then threw cold water over it. When the rock cracked, they dug it out. Roman soldiers and slaves built the roads with their hands and simple tools, but the roads were so well built that they were used for hundreds of years. | 2482.txt | 2 |
[
"The old Romans found soft soil did not make a solid base for the road.",
"The Romans built roads only on flatland",
"Flat stones were mostly used in the roads of Asia",
"The old Romans used to make use of the soft soil for the base of their roads in North Africa"
] | According to the passage, which of the following four choices is correct? | Over two thousand years ago Romewas the center of a huge empire. The Romans needed a way to move their large armies quickly so that they could protect their huge country. They needed land trade routes, so they joined all parts of their empire by a net-work of roads.
Beginning in 300
B.C., the Romans built roads in Europe, Asia and North Africa. By 200A.D., they had built 50, 000 miles of almost straight roads.
To build their roads, the Romans moved away all soft soil. They dug until they reached hard ground. Then they added layersof stone and other things. The most important roads were pavedwith large flatstones. Main Roman roads were sometimes as wide as ours today.
To build their roads, the Romans sometimes had to dig tunnels through mountains. But they didn't have any machines to help them. So they heated the rock with fire and then threw cold water over it. When the rock cracked, they dug it out. Roman soldiers and slaves built the roads with their hands and simple tools, but the roads were so well built that they were used for hundreds of years. | 2482.txt | 0 |
[
"corporate scandal",
"corporate management",
"corporate cost",
"corporate governance"
] | The Sarbanes-Oxley act is most probably about_ . | Things are slow to change in America's boardrooms
THE annual review of American company board practices by Korn/Ferry, a firm of headhunters, is a useful indicator of the health of corporate governance. T
his year's review, published on November 12th, shows that the Sarbanes-Oxley act, passed in 2002 to try to prevent a repeat of corporate collapses such as Enron's and WorldCom's, has had an impact on the boardroom--albeit at an average implementation cost that Korn/Ferry estimates at $5.1m per firm.
Two years ago, only 41% of American firms said they regularly held meetings of directors without their chief executive present; this year the figure was 93%. But some things have been surprisingly unaffected by the backlash against corporate scandals. For example, despite a growing feeling that former chief executives should not sit on their company's board, the percentage of American firms where they do has actually edged up, from 23% in 2003 to 25% in 2004.
Also, disappointingly few firms have split the jobs of chairman and chief executive. Another survey of American boards published this week, by A.T. Kearney, a firm of consultants, found that in 2002 14% of the boards of S&P 500 firms had separated the roles, and a further 16% said they planned to do so. But by 2004 only 23% overall had taken the plunge. A survey earlier in the year by consultants at McKinsey found that 70% of American directors and investors supported the idea of splitting the jobs, which is standard practice in Europe.
Another disappointment is the slow progress in abolishing "staggered" boards--ones where only one-third of the directors are up for re-election each year, to three-year terms. Invented as a defence against takeover, such boards, according to a new Harvard Law School study by Lucian Bebchuk and Alma Cohen, are unambiguously "associated with an economically significant reduction in firm value".
Despite this, the percentage of S&P 500 firms with staggered boards has fallen only slightly--from 63% in 2001 to 60% in 2003, according to the Investor Responsibility Research Centre. And many of those firms that have been forced by shareholders to abolish the system are doing so only slowly. Merck, a pharmaceutical company in trouble over the possible side-effects of its arthritis drug Vioxx, is allowing its directors to run their full term before introducing a system in which they are all re-elected (or otherwise) annually. Other companies' staggered boards are entrenched in their corporate charters, which cannot be amended by a shareholders' vote. Anyone who expected the scandals of 2001 to bring about rapid change in the balance of power between managers and owners was, at best, naive. | 1117.txt | 3 |
[
"a violent force",
"a strong impetus",
"a firm measure",
"a strong negative reaction"
] | The word ¡°backlash¡± (Line 3, Paragraph 2) most probably means_ . | Things are slow to change in America's boardrooms
THE annual review of American company board practices by Korn/Ferry, a firm of headhunters, is a useful indicator of the health of corporate governance. T
his year's review, published on November 12th, shows that the Sarbanes-Oxley act, passed in 2002 to try to prevent a repeat of corporate collapses such as Enron's and WorldCom's, has had an impact on the boardroom--albeit at an average implementation cost that Korn/Ferry estimates at $5.1m per firm.
Two years ago, only 41% of American firms said they regularly held meetings of directors without their chief executive present; this year the figure was 93%. But some things have been surprisingly unaffected by the backlash against corporate scandals. For example, despite a growing feeling that former chief executives should not sit on their company's board, the percentage of American firms where they do has actually edged up, from 23% in 2003 to 25% in 2004.
Also, disappointingly few firms have split the jobs of chairman and chief executive. Another survey of American boards published this week, by A.T. Kearney, a firm of consultants, found that in 2002 14% of the boards of S&P 500 firms had separated the roles, and a further 16% said they planned to do so. But by 2004 only 23% overall had taken the plunge. A survey earlier in the year by consultants at McKinsey found that 70% of American directors and investors supported the idea of splitting the jobs, which is standard practice in Europe.
Another disappointment is the slow progress in abolishing "staggered" boards--ones where only one-third of the directors are up for re-election each year, to three-year terms. Invented as a defence against takeover, such boards, according to a new Harvard Law School study by Lucian Bebchuk and Alma Cohen, are unambiguously "associated with an economically significant reduction in firm value".
Despite this, the percentage of S&P 500 firms with staggered boards has fallen only slightly--from 63% in 2001 to 60% in 2003, according to the Investor Responsibility Research Centre. And many of those firms that have been forced by shareholders to abolish the system are doing so only slowly. Merck, a pharmaceutical company in trouble over the possible side-effects of its arthritis drug Vioxx, is allowing its directors to run their full term before introducing a system in which they are all re-elected (or otherwise) annually. Other companies' staggered boards are entrenched in their corporate charters, which cannot be amended by a shareholders' vote. Anyone who expected the scandals of 2001 to bring about rapid change in the balance of power between managers and owners was, at best, naive. | 1117.txt | 3 |
[
"a common practice in American companies",
"what many European companies do",
"a must to keep the health of a company",
"not a popular idea among American entrepreneurs"
] | According to the text, separating the roles between chairman and chief executive is_ . | Things are slow to change in America's boardrooms
THE annual review of American company board practices by Korn/Ferry, a firm of headhunters, is a useful indicator of the health of corporate governance. T
his year's review, published on November 12th, shows that the Sarbanes-Oxley act, passed in 2002 to try to prevent a repeat of corporate collapses such as Enron's and WorldCom's, has had an impact on the boardroom--albeit at an average implementation cost that Korn/Ferry estimates at $5.1m per firm.
Two years ago, only 41% of American firms said they regularly held meetings of directors without their chief executive present; this year the figure was 93%. But some things have been surprisingly unaffected by the backlash against corporate scandals. For example, despite a growing feeling that former chief executives should not sit on their company's board, the percentage of American firms where they do has actually edged up, from 23% in 2003 to 25% in 2004.
Also, disappointingly few firms have split the jobs of chairman and chief executive. Another survey of American boards published this week, by A.T. Kearney, a firm of consultants, found that in 2002 14% of the boards of S&P 500 firms had separated the roles, and a further 16% said they planned to do so. But by 2004 only 23% overall had taken the plunge. A survey earlier in the year by consultants at McKinsey found that 70% of American directors and investors supported the idea of splitting the jobs, which is standard practice in Europe.
Another disappointment is the slow progress in abolishing "staggered" boards--ones where only one-third of the directors are up for re-election each year, to three-year terms. Invented as a defence against takeover, such boards, according to a new Harvard Law School study by Lucian Bebchuk and Alma Cohen, are unambiguously "associated with an economically significant reduction in firm value".
Despite this, the percentage of S&P 500 firms with staggered boards has fallen only slightly--from 63% in 2001 to 60% in 2003, according to the Investor Responsibility Research Centre. And many of those firms that have been forced by shareholders to abolish the system are doing so only slowly. Merck, a pharmaceutical company in trouble over the possible side-effects of its arthritis drug Vioxx, is allowing its directors to run their full term before introducing a system in which they are all re-elected (or otherwise) annually. Other companies' staggered boards are entrenched in their corporate charters, which cannot be amended by a shareholders' vote. Anyone who expected the scandals of 2001 to bring about rapid change in the balance of power between managers and owners was, at best, naive. | 1117.txt | 1 |
[
"is adverse to the increment of firm value",
"gives its board members too much power",
"has been abolished by most American companies",
"can be voted down by shareholders"
] | We learn from the text that a "staggered" board_ . | Things are slow to change in America's boardrooms
THE annual review of American company board practices by Korn/Ferry, a firm of headhunters, is a useful indicator of the health of corporate governance. T
his year's review, published on November 12th, shows that the Sarbanes-Oxley act, passed in 2002 to try to prevent a repeat of corporate collapses such as Enron's and WorldCom's, has had an impact on the boardroom--albeit at an average implementation cost that Korn/Ferry estimates at $5.1m per firm.
Two years ago, only 41% of American firms said they regularly held meetings of directors without their chief executive present; this year the figure was 93%. But some things have been surprisingly unaffected by the backlash against corporate scandals. For example, despite a growing feeling that former chief executives should not sit on their company's board, the percentage of American firms where they do has actually edged up, from 23% in 2003 to 25% in 2004.
Also, disappointingly few firms have split the jobs of chairman and chief executive. Another survey of American boards published this week, by A.T. Kearney, a firm of consultants, found that in 2002 14% of the boards of S&P 500 firms had separated the roles, and a further 16% said they planned to do so. But by 2004 only 23% overall had taken the plunge. A survey earlier in the year by consultants at McKinsey found that 70% of American directors and investors supported the idea of splitting the jobs, which is standard practice in Europe.
Another disappointment is the slow progress in abolishing "staggered" boards--ones where only one-third of the directors are up for re-election each year, to three-year terms. Invented as a defence against takeover, such boards, according to a new Harvard Law School study by Lucian Bebchuk and Alma Cohen, are unambiguously "associated with an economically significant reduction in firm value".
Despite this, the percentage of S&P 500 firms with staggered boards has fallen only slightly--from 63% in 2001 to 60% in 2003, according to the Investor Responsibility Research Centre. And many of those firms that have been forced by shareholders to abolish the system are doing so only slowly. Merck, a pharmaceutical company in trouble over the possible side-effects of its arthritis drug Vioxx, is allowing its directors to run their full term before introducing a system in which they are all re-elected (or otherwise) annually. Other companies' staggered boards are entrenched in their corporate charters, which cannot be amended by a shareholders' vote. Anyone who expected the scandals of 2001 to bring about rapid change in the balance of power between managers and owners was, at best, naive. | 1117.txt | 0 |
[
"biased",
"pessimistic",
"objective",
"critical"
] | Toward the board practice of American companies, the writer's attitude can be said to be_ . | Things are slow to change in America's boardrooms
THE annual review of American company board practices by Korn/Ferry, a firm of headhunters, is a useful indicator of the health of corporate governance. T
his year's review, published on November 12th, shows that the Sarbanes-Oxley act, passed in 2002 to try to prevent a repeat of corporate collapses such as Enron's and WorldCom's, has had an impact on the boardroom--albeit at an average implementation cost that Korn/Ferry estimates at $5.1m per firm.
Two years ago, only 41% of American firms said they regularly held meetings of directors without their chief executive present; this year the figure was 93%. But some things have been surprisingly unaffected by the backlash against corporate scandals. For example, despite a growing feeling that former chief executives should not sit on their company's board, the percentage of American firms where they do has actually edged up, from 23% in 2003 to 25% in 2004.
Also, disappointingly few firms have split the jobs of chairman and chief executive. Another survey of American boards published this week, by A.T. Kearney, a firm of consultants, found that in 2002 14% of the boards of S&P 500 firms had separated the roles, and a further 16% said they planned to do so. But by 2004 only 23% overall had taken the plunge. A survey earlier in the year by consultants at McKinsey found that 70% of American directors and investors supported the idea of splitting the jobs, which is standard practice in Europe.
Another disappointment is the slow progress in abolishing "staggered" boards--ones where only one-third of the directors are up for re-election each year, to three-year terms. Invented as a defence against takeover, such boards, according to a new Harvard Law School study by Lucian Bebchuk and Alma Cohen, are unambiguously "associated with an economically significant reduction in firm value".
Despite this, the percentage of S&P 500 firms with staggered boards has fallen only slightly--from 63% in 2001 to 60% in 2003, according to the Investor Responsibility Research Centre. And many of those firms that have been forced by shareholders to abolish the system are doing so only slowly. Merck, a pharmaceutical company in trouble over the possible side-effects of its arthritis drug Vioxx, is allowing its directors to run their full term before introducing a system in which they are all re-elected (or otherwise) annually. Other companies' staggered boards are entrenched in their corporate charters, which cannot be amended by a shareholders' vote. Anyone who expected the scandals of 2001 to bring about rapid change in the balance of power between managers and owners was, at best, naive. | 1117.txt | 3 |
[
"we haven't tested the manned spaceship",
"before we send a manned spaceship,we should carry out many tests",
"though we tried once,we need to do more tests of the unmanned spaceship",
"sending up a manned spaceship can show a country's scientific level"
] | The main idea of t he 7th paragraph is-- | ZHUHAI-China will soon put a person into space and become the third nationin the world to have manned spaceflight,a top Chinese aerospaceofficial said on November 5.
A manned launchwas not far off,Vice President Hu Hongfu of China AerospaceScience Technology Corp(CASTC)told a news conference at the third huhai Air Show."It will not be long before Chinese astronauts can ride locally-made spaceships into space,"Hu said.The official gave no timetable but said it would happen"at beginning of the 21st century".
The former Soviet Union and the United States have been putting people into orbit since the early 1960s,but other nations have not considered the challenge worth following.
China has already built and sent up its own satellites for communications and weather forecasting.The new communication satellites would help to encourage the country's broadcasting industry,Hu said.
But the company,which includes over 130 aerospace agencies,said the lifting ability and success rate of China's space-launches were almost equal in quality tothose of other countries.
China would gradually close the distance between its country's space industry and that of other nations.He added that they were willing to send up commercial satellites for Taiwan.
On China's plan to send up manned spaceflights,Hu said China had made important development after thesuccessful launch in November last year of the country's first experimental spaceship,Shenhou."The whole project is in the research stage and a lot of work needs to be done,"Hu said."We need to have more tests ofthe unmanned spaceship."
China last year announced a four_step manned spaceflight plan with the aim of setting up a spacestation served by a spaceship travelling between two places. | 3674.txt | 2 |
[
"tell us the present situation of China's aerospace technology",
"remind us w hat we should do compared to other countries",
"find out the reason why China falls behind",
"tell us that China will send up its manned spaceship soon"
] | The writer wrote the passage to-- | ZHUHAI-China will soon put a person into space and become the third nationin the world to have manned spaceflight,a top Chinese aerospaceofficial said on November 5.
A manned launchwas not far off,Vice President Hu Hongfu of China AerospaceScience Technology Corp(CASTC)told a news conference at the third huhai Air Show."It will not be long before Chinese astronauts can ride locally-made spaceships into space,"Hu said.The official gave no timetable but said it would happen"at beginning of the 21st century".
The former Soviet Union and the United States have been putting people into orbit since the early 1960s,but other nations have not considered the challenge worth following.
China has already built and sent up its own satellites for communications and weather forecasting.The new communication satellites would help to encourage the country's broadcasting industry,Hu said.
But the company,which includes over 130 aerospace agencies,said the lifting ability and success rate of China's space-launches were almost equal in quality tothose of other countries.
China would gradually close the distance between its country's space industry and that of other nations.He added that they were willing to send up commercial satellites for Taiwan.
On China's plan to send up manned spaceflights,Hu said China had made important development after thesuccessful launch in November last year of the country's first experimental spaceship,Shenhou."The whole project is in the research stage and a lot of work needs to be done,"Hu said."We need to have more tests ofthe unmanned spaceship."
China last year announced a four_step manned spaceflight plan with the aim of setting up a spacestation served by a spaceship travelling between two places. | 3674.txt | 3 |
[
"Farmers are changing the way they grow coffee.",
"Coffee is becoming more expensive to produce.",
"Shade-grown coffee is more expensive than sun-grown coffee.",
"People should buy shade-grown coffee."
] | What is the main idea of this passage? | When people argue about whether coffee is good for health, they're usually thinking of the health of the coffee drinker. Is it food for your heart? Does it increase blood pressure? Does it help you concentrate? However, coffee affects the health of the human population in other ways, too.
Traditionally, coffee bushes were planted under the canopy ( ) of taller indigenous trees. However, more and more farmers in Latin America are deforesting the land to grow full-sun coffees. At first, this increases production because more coffee bushes can be planted if there aren't any trees. With increased production come increased profits.
Unfortunately, deforesting for coffee production immediately decreases local-wildlife habitat.
Native birds nest and hide from predators in the tall trees and migrating birds rest there.
Furthermore, in the long term, the full-sun method also damages the ecosystem because more chemical fertilizers and pesticides are needed to grow the coffee. The fertilizers and pesticides kill insects that eat coffee plant, but then the birds eat the poisoned insects and also die. The chemicals kill or sicken other animals as well, and can even enter the water that people will eventually drink.
Fortunately, farmers in Central and South America are beginning to grow more coffee bushes in the shade. We can support these farmers by buying coffee with such labels as "shade grown" and"bird friendly". Sure, these varieties might cost a little more. But we're paying for the health of the birds, the land, ourselves, and the planet. I think it's worth it. | 1275.txt | 0 |
[
"the positive effects of coffee",
"a change of coffee growth",
"something that is the most important",
"how coffee production used to be"
] | The function of the word "Traditionally" in Paragraph 2 is to show _ . | When people argue about whether coffee is good for health, they're usually thinking of the health of the coffee drinker. Is it food for your heart? Does it increase blood pressure? Does it help you concentrate? However, coffee affects the health of the human population in other ways, too.
Traditionally, coffee bushes were planted under the canopy ( ) of taller indigenous trees. However, more and more farmers in Latin America are deforesting the land to grow full-sun coffees. At first, this increases production because more coffee bushes can be planted if there aren't any trees. With increased production come increased profits.
Unfortunately, deforesting for coffee production immediately decreases local-wildlife habitat.
Native birds nest and hide from predators in the tall trees and migrating birds rest there.
Furthermore, in the long term, the full-sun method also damages the ecosystem because more chemical fertilizers and pesticides are needed to grow the coffee. The fertilizers and pesticides kill insects that eat coffee plant, but then the birds eat the poisoned insects and also die. The chemicals kill or sicken other animals as well, and can even enter the water that people will eventually drink.
Fortunately, farmers in Central and South America are beginning to grow more coffee bushes in the shade. We can support these farmers by buying coffee with such labels as "shade grown" and"bird friendly". Sure, these varieties might cost a little more. But we're paying for the health of the birds, the land, ourselves, and the planet. I think it's worth it. | 1275.txt | 1 |
[
"more insects",
"better quality coffee",
"larger farms",
"higher profits"
] | What does increased production of full-sun coffee bring about? | When people argue about whether coffee is good for health, they're usually thinking of the health of the coffee drinker. Is it food for your heart? Does it increase blood pressure? Does it help you concentrate? However, coffee affects the health of the human population in other ways, too.
Traditionally, coffee bushes were planted under the canopy ( ) of taller indigenous trees. However, more and more farmers in Latin America are deforesting the land to grow full-sun coffees. At first, this increases production because more coffee bushes can be planted if there aren't any trees. With increased production come increased profits.
Unfortunately, deforesting for coffee production immediately decreases local-wildlife habitat.
Native birds nest and hide from predators in the tall trees and migrating birds rest there.
Furthermore, in the long term, the full-sun method also damages the ecosystem because more chemical fertilizers and pesticides are needed to grow the coffee. The fertilizers and pesticides kill insects that eat coffee plant, but then the birds eat the poisoned insects and also die. The chemicals kill or sicken other animals as well, and can even enter the water that people will eventually drink.
Fortunately, farmers in Central and South America are beginning to grow more coffee bushes in the shade. We can support these farmers by buying coffee with such labels as "shade grown" and"bird friendly". Sure, these varieties might cost a little more. But we're paying for the health of the birds, the land, ourselves, and the planet. I think it's worth it. | 1275.txt | 3 |
[
"They buy more land from other farmers.",
"They cut down trees.",
"They move to another country.",
"They turn grassland into farmland."
] | How do farmers find more land for growing full-sun coffee? | When people argue about whether coffee is good for health, they're usually thinking of the health of the coffee drinker. Is it food for your heart? Does it increase blood pressure? Does it help you concentrate? However, coffee affects the health of the human population in other ways, too.
Traditionally, coffee bushes were planted under the canopy ( ) of taller indigenous trees. However, more and more farmers in Latin America are deforesting the land to grow full-sun coffees. At first, this increases production because more coffee bushes can be planted if there aren't any trees. With increased production come increased profits.
Unfortunately, deforesting for coffee production immediately decreases local-wildlife habitat.
Native birds nest and hide from predators in the tall trees and migrating birds rest there.
Furthermore, in the long term, the full-sun method also damages the ecosystem because more chemical fertilizers and pesticides are needed to grow the coffee. The fertilizers and pesticides kill insects that eat coffee plant, but then the birds eat the poisoned insects and also die. The chemicals kill or sicken other animals as well, and can even enter the water that people will eventually drink.
Fortunately, farmers in Central and South America are beginning to grow more coffee bushes in the shade. We can support these farmers by buying coffee with such labels as "shade grown" and"bird friendly". Sure, these varieties might cost a little more. But we're paying for the health of the birds, the land, ourselves, and the planet. I think it's worth it. | 1275.txt | 1 |
[
"insects",
"air",
"birds",
"humans"
] | The full-sun method may affect the following EXCEPT _ . | When people argue about whether coffee is good for health, they're usually thinking of the health of the coffee drinker. Is it food for your heart? Does it increase blood pressure? Does it help you concentrate? However, coffee affects the health of the human population in other ways, too.
Traditionally, coffee bushes were planted under the canopy ( ) of taller indigenous trees. However, more and more farmers in Latin America are deforesting the land to grow full-sun coffees. At first, this increases production because more coffee bushes can be planted if there aren't any trees. With increased production come increased profits.
Unfortunately, deforesting for coffee production immediately decreases local-wildlife habitat.
Native birds nest and hide from predators in the tall trees and migrating birds rest there.
Furthermore, in the long term, the full-sun method also damages the ecosystem because more chemical fertilizers and pesticides are needed to grow the coffee. The fertilizers and pesticides kill insects that eat coffee plant, but then the birds eat the poisoned insects and also die. The chemicals kill or sicken other animals as well, and can even enter the water that people will eventually drink.
Fortunately, farmers in Central and South America are beginning to grow more coffee bushes in the shade. We can support these farmers by buying coffee with such labels as "shade grown" and"bird friendly". Sure, these varieties might cost a little more. But we're paying for the health of the birds, the land, ourselves, and the planet. I think it's worth it. | 1275.txt | 1 |
[
"you can have more time to play with others",
"you needn't care about other's feeling if you are happy",
"you are selfish and treat others rudely",
"you can deal with your business as you have planned"
] | The sentence "Saying ‘yes' to yourself" means _ . | Listen carefully, working people, we would like to tell you something that could save your precious time and money! Best of all, it is free!
It's "no".
What do you ask? We'll say it again: "No".
Sweet and simple "no".
Say "no" at your office and see how quickly that pile of work on your desk disappears.
"Saying ‘no' to others means you are saying ‘yes' to yourself, " said Leslie Charles, a professional speaker from East Lansing, Michigan.
"Time is precious. People are spending money buying time. And yet we are willing to give up our time because we can't say ‘no'."
Susie Watson, a famous writer, said people who always say "yes" need to say "no" without guiltor fear of punishment. "I would rather have someone give me a loving ‘no' than an obligated ‘yes', " she said.
Susie Watson says she feels "no" obligation to give an explanation when she says "no" either socially or professionally. Does she feel guilty about it? "Not at all, " said Watson, who is director of advertising and public relations at Timex Corp in Middlebury, Conneticut. "Most people are afraid of saying ‘no'… My advice is to say ‘yes' only if you don't mean ‘no'."
Watson said "no" is the most effective weapon against wasting time. "Every year there are more demands on your time… Other people are happy to use up your time, " Watson said. Time saving appears to be "no's" greatest friend.
"No" can be your new friend, a powerful tool to take back your life. "No" may even take you further in the business world than "yes".
"No" is power and strength. "No" now seems completely correct. "Saying ‘no' isn't easy. But finally it's greatly liberating," Charles said. But, he added, a "no" project needs to be worked on every day because it is hard to change long-term habit.
But, he also warns: "Don't go to extremes. Don't find yourself saying ‘no' to everything. In return you should learn to hear ‘no'." | 2919.txt | 3 |
[
"secret way",
"polite way",
"proud way",
"guilty way"
] | When you say "no" to others you should say it in a _ . | Listen carefully, working people, we would like to tell you something that could save your precious time and money! Best of all, it is free!
It's "no".
What do you ask? We'll say it again: "No".
Sweet and simple "no".
Say "no" at your office and see how quickly that pile of work on your desk disappears.
"Saying ‘no' to others means you are saying ‘yes' to yourself, " said Leslie Charles, a professional speaker from East Lansing, Michigan.
"Time is precious. People are spending money buying time. And yet we are willing to give up our time because we can't say ‘no'."
Susie Watson, a famous writer, said people who always say "yes" need to say "no" without guiltor fear of punishment. "I would rather have someone give me a loving ‘no' than an obligated ‘yes', " she said.
Susie Watson says she feels "no" obligation to give an explanation when she says "no" either socially or professionally. Does she feel guilty about it? "Not at all, " said Watson, who is director of advertising and public relations at Timex Corp in Middlebury, Conneticut. "Most people are afraid of saying ‘no'… My advice is to say ‘yes' only if you don't mean ‘no'."
Watson said "no" is the most effective weapon against wasting time. "Every year there are more demands on your time… Other people are happy to use up your time, " Watson said. Time saving appears to be "no's" greatest friend.
"No" can be your new friend, a powerful tool to take back your life. "No" may even take you further in the business world than "yes".
"No" is power and strength. "No" now seems completely correct. "Saying ‘no' isn't easy. But finally it's greatly liberating," Charles said. But, he added, a "no" project needs to be worked on every day because it is hard to change long-term habit.
But, he also warns: "Don't go to extremes. Don't find yourself saying ‘no' to everything. In return you should learn to hear ‘no'." | 2919.txt | 1 |
[
"they say \"no\" at a suitable time",
"they say \"no\" as much as possible",
"they are afraid of saying \"no\"",
"they make others angry at them"
] | In Watson's opinion, people can save much time on condition that _ . | Listen carefully, working people, we would like to tell you something that could save your precious time and money! Best of all, it is free!
It's "no".
What do you ask? We'll say it again: "No".
Sweet and simple "no".
Say "no" at your office and see how quickly that pile of work on your desk disappears.
"Saying ‘no' to others means you are saying ‘yes' to yourself, " said Leslie Charles, a professional speaker from East Lansing, Michigan.
"Time is precious. People are spending money buying time. And yet we are willing to give up our time because we can't say ‘no'."
Susie Watson, a famous writer, said people who always say "yes" need to say "no" without guiltor fear of punishment. "I would rather have someone give me a loving ‘no' than an obligated ‘yes', " she said.
Susie Watson says she feels "no" obligation to give an explanation when she says "no" either socially or professionally. Does she feel guilty about it? "Not at all, " said Watson, who is director of advertising and public relations at Timex Corp in Middlebury, Conneticut. "Most people are afraid of saying ‘no'… My advice is to say ‘yes' only if you don't mean ‘no'."
Watson said "no" is the most effective weapon against wasting time. "Every year there are more demands on your time… Other people are happy to use up your time, " Watson said. Time saving appears to be "no's" greatest friend.
"No" can be your new friend, a powerful tool to take back your life. "No" may even take you further in the business world than "yes".
"No" is power and strength. "No" now seems completely correct. "Saying ‘no' isn't easy. But finally it's greatly liberating," Charles said. But, he added, a "no" project needs to be worked on every day because it is hard to change long-term habit.
But, he also warns: "Don't go to extremes. Don't find yourself saying ‘no' to everything. In return you should learn to hear ‘no'." | 2919.txt | 0 |
[
"environment",
"species",
"extinction",
"99 percent"
] | The word "it" in line 3 refers to | It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.
The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.
One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. | 377.txt | 1 |
[
"exceptionally",
"dramatically",
"eventually",
"unfortunately"
] | The word "ultimately" in line 8 is closest in meaning to | It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.
The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.
One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. | 377.txt | 2 |
[
"They have remained basically unchanged from their original forms.",
"They have been able to adapt to ecological changes.",
"They have caused rapid change in the environment.",
"They are no longer in existence."
] | What does the author say in paragraph 1 regarding most species in Earth's history | It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.
The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.
One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. | 377.txt | 3 |
[
"Temperature changes",
"Availability of food resources",
"Introduction of new species",
"Competition among species"
] | Which of the following is NOT mentioned in paragraph 1 as resulting from rapid ecological change? | It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.
The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.
One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. | 377.txt | 2 |
[
"change",
"recovery",
"help",
"death"
] | The word "demise" in line 12 is closest in meaning to | It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.
The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.
One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. | 377.txt | 3 |
[
"To demonstrate the interdependence of different species.",
"To emphasize the importance of food resources in preventing mass extinction.",
"To illustrate a comparison between organisms that live on the land and those that live in the ocean.",
"To point out that certain species could never become extinct."
] | Why is "plankton" mentioned in line 17? | It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.
The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.
One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. | 377.txt | 0 |
[
"Extinction of species has occurred from time to time throughout Earth's history.",
"Extinctions on Earth have generally been massive",
"There has been only one mass extinction in Earth's history.",
"Dinosaurs became extinct much earlier than scientists originally believed."
] | According to paragraph 2, evidence from fossils suggests that | It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.
The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.
One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. | 377.txt | 0 |
[
"published information",
"research method",
"ongoing experiment",
"scientific discovery"
] | The word "finding" in line 20 is closest in meaning to | It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.
The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.
One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. | 377.txt | 3 |
[
"Many scientists could be expected to disagree with it.",
"Evidence to support the theory has recently been found.",
"The theory is no longer seriously considered.",
"Most scientists believe the theory to be accurate."
] | Which of the following can be inferred about the theory mentioned in Line 21-23? | It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.
The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.
One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. | 377.txt | 0 |
[
"It reflects the interrelationship of many species.",
"It may depend on chance events.",
"It does not vary greatly from species to species",
"It is associated with astronomical conditions."
] | In paragraph 3, the author makes which of the following statements about a species' survival? | It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.
The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.
One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. | 377.txt | 1 |
[
"26 million years ago",
"65 million years ago",
"225 million years ago",
"250 million years ago"
] | According to the passage , it is believed that the largest extinction of a species occurred | It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.
The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.
One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. | 377.txt | 2 |
[
"Pains do not necessarily lead to gains.",
"What is learned is rarely applicable in life.",
"Failure more often than not breeds success.",
"The more is taught, the less is learnt."
] | Why does the author call the learning process a paradox? | Call it the "learning paradox", the more you struggle and even fail while you?re trying to learn new information, the better you?re likely to recall and apply that information later. The learning paradox is at the heart of "productive failure".a phenomenon identified by researcher Manu Kapur. Kapur points outthat while the model adopted by many teachers when introducing students to new knowledge―providing lots of structure and guidance early on, until the students show that they can do it on their own―makes intuitive sense, it may not be the best way to promote learning. Rather, it?s better to let the learners wrestle (with the material ontheir own for a while, refraining from giving them any assistance at the start. In a paper published recently, Kapur applied the principle of productive failure to mathematical problem solving in three schools.
With one group of students, the teacher provided strong "scaffolding"―instructional support-and feedback. With the teacher?s help, these pupils were able to find the answers to their set of problems. Meanwhile, a second group was directed to solve the same problems by collaborating with one another, without any prompts from their instructor. These students weren?t able to complete the problems correctly. But in the course of trying to do so, they generated a lot of ideas about the nature of the problems and about what potential solutions would look like. And when the two groups were tested on what they?d learned, the second group "significantly outperformed" the first. The apparent struggles of the floundering (grouphave what Kapurcalls a "hidden efficacy": they lead people to understand the deep structure of problems, not simply their correct solutions. When these students encounter a new problem of the same type on a test, they?re able to transfer the knowledge they?ve gathered more effectively than those who were the passive recipients of someone else?s expertise.
In the real world, problems rarely come neatly packaged, so being able to discern their deep structure is key. But, Kapur notes, none of us like to fail, no matter how often Silicon Valley entrepreneurs praise the beneficial effects of an idea that fails or a start-up company that crashesand burns. So we need to "design for productive failure" by building it into the learning process. Kapur has identified three conditions that promote this kind of beneficial struggle. First, choose problems to work on that"challenge but do not frustrate". Second, provide learners with opportunities to explain and elaborate on what they?re doing. Third, give learners the chance to compare and contrast good and bad solutions to the problems. And to those students who protest this tough-love teaching style: you'll thank me later. | 1286.txt | 2 |
[
"Asking students to find and solve problems on their own.",
"Developing students? ability to apply what they learn.",
"Giving students detailed guidance and instruction.",
"Allowing students a free hand in problem solving."
] | What does Kapur disapprove of in teaching? | Call it the "learning paradox", the more you struggle and even fail while you?re trying to learn new information, the better you?re likely to recall and apply that information later. The learning paradox is at the heart of "productive failure".a phenomenon identified by researcher Manu Kapur. Kapur points outthat while the model adopted by many teachers when introducing students to new knowledge―providing lots of structure and guidance early on, until the students show that they can do it on their own―makes intuitive sense, it may not be the best way to promote learning. Rather, it?s better to let the learners wrestle (with the material ontheir own for a while, refraining from giving them any assistance at the start. In a paper published recently, Kapur applied the principle of productive failure to mathematical problem solving in three schools.
With one group of students, the teacher provided strong "scaffolding"―instructional support-and feedback. With the teacher?s help, these pupils were able to find the answers to their set of problems. Meanwhile, a second group was directed to solve the same problems by collaborating with one another, without any prompts from their instructor. These students weren?t able to complete the problems correctly. But in the course of trying to do so, they generated a lot of ideas about the nature of the problems and about what potential solutions would look like. And when the two groups were tested on what they?d learned, the second group "significantly outperformed" the first. The apparent struggles of the floundering (grouphave what Kapurcalls a "hidden efficacy": they lead people to understand the deep structure of problems, not simply their correct solutions. When these students encounter a new problem of the same type on a test, they?re able to transfer the knowledge they?ve gathered more effectively than those who were the passive recipients of someone else?s expertise.
In the real world, problems rarely come neatly packaged, so being able to discern their deep structure is key. But, Kapur notes, none of us like to fail, no matter how often Silicon Valley entrepreneurs praise the beneficial effects of an idea that fails or a start-up company that crashesand burns. So we need to "design for productive failure" by building it into the learning process. Kapur has identified three conditions that promote this kind of beneficial struggle. First, choose problems to work on that"challenge but do not frustrate". Second, provide learners with opportunities to explain and elaborate on what they?re doing. Third, give learners the chance to compare and contrast good and bad solutions to the problems. And to those students who protest this tough-love teaching style: you'll thank me later. | 1286.txt | 2 |
[
"It will make teaching easier.",
"It can motivate average students.",
"It is a sensible way of teaching.",
"It will enhance students? confidence."
] | What do people tend to think of providing strong "scaffolding" in teaching? | Call it the "learning paradox", the more you struggle and even fail while you?re trying to learn new information, the better you?re likely to recall and apply that information later. The learning paradox is at the heart of "productive failure".a phenomenon identified by researcher Manu Kapur. Kapur points outthat while the model adopted by many teachers when introducing students to new knowledge―providing lots of structure and guidance early on, until the students show that they can do it on their own―makes intuitive sense, it may not be the best way to promote learning. Rather, it?s better to let the learners wrestle (with the material ontheir own for a while, refraining from giving them any assistance at the start. In a paper published recently, Kapur applied the principle of productive failure to mathematical problem solving in three schools.
With one group of students, the teacher provided strong "scaffolding"―instructional support-and feedback. With the teacher?s help, these pupils were able to find the answers to their set of problems. Meanwhile, a second group was directed to solve the same problems by collaborating with one another, without any prompts from their instructor. These students weren?t able to complete the problems correctly. But in the course of trying to do so, they generated a lot of ideas about the nature of the problems and about what potential solutions would look like. And when the two groups were tested on what they?d learned, the second group "significantly outperformed" the first. The apparent struggles of the floundering (grouphave what Kapurcalls a "hidden efficacy": they lead people to understand the deep structure of problems, not simply their correct solutions. When these students encounter a new problem of the same type on a test, they?re able to transfer the knowledge they?ve gathered more effectively than those who were the passive recipients of someone else?s expertise.
In the real world, problems rarely come neatly packaged, so being able to discern their deep structure is key. But, Kapur notes, none of us like to fail, no matter how often Silicon Valley entrepreneurs praise the beneficial effects of an idea that fails or a start-up company that crashesand burns. So we need to "design for productive failure" by building it into the learning process. Kapur has identified three conditions that promote this kind of beneficial struggle. First, choose problems to work on that"challenge but do not frustrate". Second, provide learners with opportunities to explain and elaborate on what they?re doing. Third, give learners the chance to compare and contrast good and bad solutions to the problems. And to those students who protest this tough-love teaching style: you'll thank me later. | 1286.txt | 1 |
[
"It should be able to encourage collaborative learning.",
"It should be easy enough so as not to frustrate students.",
"It should be solvable by average students with ease.",
"It should be difficult enough but still within their reach."
] | What kind of problem should be given to students to solve according to Kapur? | Call it the "learning paradox", the more you struggle and even fail while you?re trying to learn new information, the better you?re likely to recall and apply that information later. The learning paradox is at the heart of "productive failure".a phenomenon identified by researcher Manu Kapur. Kapur points outthat while the model adopted by many teachers when introducing students to new knowledge―providing lots of structure and guidance early on, until the students show that they can do it on their own―makes intuitive sense, it may not be the best way to promote learning. Rather, it?s better to let the learners wrestle (with the material ontheir own for a while, refraining from giving them any assistance at the start. In a paper published recently, Kapur applied the principle of productive failure to mathematical problem solving in three schools.
With one group of students, the teacher provided strong "scaffolding"―instructional support-and feedback. With the teacher?s help, these pupils were able to find the answers to their set of problems. Meanwhile, a second group was directed to solve the same problems by collaborating with one another, without any prompts from their instructor. These students weren?t able to complete the problems correctly. But in the course of trying to do so, they generated a lot of ideas about the nature of the problems and about what potential solutions would look like. And when the two groups were tested on what they?d learned, the second group "significantly outperformed" the first. The apparent struggles of the floundering (grouphave what Kapurcalls a "hidden efficacy": they lead people to understand the deep structure of problems, not simply their correct solutions. When these students encounter a new problem of the same type on a test, they?re able to transfer the knowledge they?ve gathered more effectively than those who were the passive recipients of someone else?s expertise.
In the real world, problems rarely come neatly packaged, so being able to discern their deep structure is key. But, Kapur notes, none of us like to fail, no matter how often Silicon Valley entrepreneurs praise the beneficial effects of an idea that fails or a start-up company that crashesand burns. So we need to "design for productive failure" by building it into the learning process. Kapur has identified three conditions that promote this kind of beneficial struggle. First, choose problems to work on that"challenge but do not frustrate". Second, provide learners with opportunities to explain and elaborate on what they?re doing. Third, give learners the chance to compare and contrast good and bad solutions to the problems. And to those students who protest this tough-love teaching style: you'll thank me later. | 1286.txt | 3 |
[
"Students will be grateful in the long run.",
"Teachers will meet with a lot of resistance.",
"Parents will think it too harsh on their kids.",
"It may not be able to yield the desired results."
] | What can be expected of "this tough-love teaching style" (Lines 8-9, Para. 5)? | Call it the "learning paradox", the more you struggle and even fail while you?re trying to learn new information, the better you?re likely to recall and apply that information later. The learning paradox is at the heart of "productive failure".a phenomenon identified by researcher Manu Kapur. Kapur points outthat while the model adopted by many teachers when introducing students to new knowledge―providing lots of structure and guidance early on, until the students show that they can do it on their own―makes intuitive sense, it may not be the best way to promote learning. Rather, it?s better to let the learners wrestle (with the material ontheir own for a while, refraining from giving them any assistance at the start. In a paper published recently, Kapur applied the principle of productive failure to mathematical problem solving in three schools.
With one group of students, the teacher provided strong "scaffolding"―instructional support-and feedback. With the teacher?s help, these pupils were able to find the answers to their set of problems. Meanwhile, a second group was directed to solve the same problems by collaborating with one another, without any prompts from their instructor. These students weren?t able to complete the problems correctly. But in the course of trying to do so, they generated a lot of ideas about the nature of the problems and about what potential solutions would look like. And when the two groups were tested on what they?d learned, the second group "significantly outperformed" the first. The apparent struggles of the floundering (grouphave what Kapurcalls a "hidden efficacy": they lead people to understand the deep structure of problems, not simply their correct solutions. When these students encounter a new problem of the same type on a test, they?re able to transfer the knowledge they?ve gathered more effectively than those who were the passive recipients of someone else?s expertise.
In the real world, problems rarely come neatly packaged, so being able to discern their deep structure is key. But, Kapur notes, none of us like to fail, no matter how often Silicon Valley entrepreneurs praise the beneficial effects of an idea that fails or a start-up company that crashesand burns. So we need to "design for productive failure" by building it into the learning process. Kapur has identified three conditions that promote this kind of beneficial struggle. First, choose problems to work on that"challenge but do not frustrate". Second, provide learners with opportunities to explain and elaborate on what they?re doing. Third, give learners the chance to compare and contrast good and bad solutions to the problems. And to those students who protest this tough-love teaching style: you'll thank me later. | 1286.txt | 0 |
[
"The use of nontraditional sounds in contemporary music",
"How sounds are produced electronically",
"How standard musical notation has been adapted for nontraditional sounds",
"Several composers who have experimented with the electronic production of sound"
] | What does the passage mainly discuss? | Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varèse (1883-1965) called thus the "liberation of sounD..the right to make music with any and all sounds." Electronic music, for example - made with the aid of computers, synthesizers, and electronic instruments - may include sounds that in the past would not have been considered musical. Environmental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and nonelectronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional percussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music - tom-toms, bongos, slapsticks, maracas-are widely used.
In the search for novel sounds, increased use has been made in Western music of microtones. Non-western music typically divides and interval between two pitches more finely than western music does, thereby producing a greater number of distinct tones, or microtones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters - closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well. Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium.
Because standard music notation makes no provision for many of these innovations, recent music scores may contain graphlike diagrams, new note shapes and symbols, and novel ways of arranging notation on the page. | 4271.txt | 0 |
[
"more distinctive",
"more controversial",
"more extensive",
"more impressive"
] | The word "wider" in one 1 is closest in meaning to more impressive | Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varèse (1883-1965) called thus the "liberation of sounD..the right to make music with any and all sounds." Electronic music, for example - made with the aid of computers, synthesizers, and electronic instruments - may include sounds that in the past would not have been considered musical. Environmental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and nonelectronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional percussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music - tom-toms, bongos, slapsticks, maracas-are widely used.
In the search for novel sounds, increased use has been made in Western music of microtones. Non-western music typically divides and interval between two pitches more finely than western music does, thereby producing a greater number of distinct tones, or microtones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters - closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well. Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium.
Because standard music notation makes no provision for many of these innovations, recent music scores may contain graphlike diagrams, new note shapes and symbols, and novel ways of arranging notation on the page. | 4271.txt | 2 |
[
"criticized electronic music as too noiselike",
"modified sonic of the electronic instruments he used in his music",
"believed that any sound could be used in music",
"wrote music with environmental themes"
] | The passage suggests that Edgard Varèse is an example of a composer who | Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varèse (1883-1965) called thus the "liberation of sounD..the right to make music with any and all sounds." Electronic music, for example - made with the aid of computers, synthesizers, and electronic instruments - may include sounds that in the past would not have been considered musical. Environmental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and nonelectronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional percussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music - tom-toms, bongos, slapsticks, maracas-are widely used.
In the search for novel sounds, increased use has been made in Western music of microtones. Non-western music typically divides and interval between two pitches more finely than western music does, thereby producing a greater number of distinct tones, or microtones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters - closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well. Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium.
Because standard music notation makes no provision for many of these innovations, recent music scores may contain graphlike diagrams, new note shapes and symbols, and novel ways of arranging notation on the page. | 4271.txt | 2 |
[
"piano",
"string",
"blade",
"music"
] | The word "it" in line 12 refers to | Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varèse (1883-1965) called thus the "liberation of sounD..the right to make music with any and all sounds." Electronic music, for example - made with the aid of computers, synthesizers, and electronic instruments - may include sounds that in the past would not have been considered musical. Environmental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and nonelectronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional percussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music - tom-toms, bongos, slapsticks, maracas-are widely used.
In the search for novel sounds, increased use has been made in Western music of microtones. Non-western music typically divides and interval between two pitches more finely than western music does, thereby producing a greater number of distinct tones, or microtones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters - closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well. Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium.
Because standard music notation makes no provision for many of these innovations, recent music scores may contain graphlike diagrams, new note shapes and symbols, and novel ways of arranging notation on the page. | 4271.txt | 1 |
[
"string",
"percussion",
"woodwind",
"brass"
] | According to the passage , which of the following types of instruments has played a role in much of the innovation in western music? | Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varèse (1883-1965) called thus the "liberation of sounD..the right to make music with any and all sounds." Electronic music, for example - made with the aid of computers, synthesizers, and electronic instruments - may include sounds that in the past would not have been considered musical. Environmental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and nonelectronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional percussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music - tom-toms, bongos, slapsticks, maracas-are widely used.
In the search for novel sounds, increased use has been made in Western music of microtones. Non-western music typically divides and interval between two pitches more finely than western music does, thereby producing a greater number of distinct tones, or microtones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters - closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well. Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium.
Because standard music notation makes no provision for many of these innovations, recent music scores may contain graphlike diagrams, new note shapes and symbols, and novel ways of arranging notation on the page. | 4271.txt | 1 |
[
"in return for",
"in spite of",
"by the way",
"by that means"
] | The word "thereby" in line 20 is closest in meaning to | Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varèse (1883-1965) called thus the "liberation of sounD..the right to make music with any and all sounds." Electronic music, for example - made with the aid of computers, synthesizers, and electronic instruments - may include sounds that in the past would not have been considered musical. Environmental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and nonelectronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional percussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music - tom-toms, bongos, slapsticks, maracas-are widely used.
In the search for novel sounds, increased use has been made in Western music of microtones. Non-western music typically divides and interval between two pitches more finely than western music does, thereby producing a greater number of distinct tones, or microtones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters - closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well. Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium.
Because standard music notation makes no provision for many of these innovations, recent music scores may contain graphlike diagrams, new note shapes and symbols, and novel ways of arranging notation on the page. | 4271.txt | 3 |
[
"Using tones that are clumped together",
"Combining traditional and nontradinonal instruments",
"Seating musicians in unusual areas of an auditorium",
"Playing Western music for non-Western audiences"
] | According to the passage , Krzysztof Penderecki is known for which of the following practices? | Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varèse (1883-1965) called thus the "liberation of sounD..the right to make music with any and all sounds." Electronic music, for example - made with the aid of computers, synthesizers, and electronic instruments - may include sounds that in the past would not have been considered musical. Environmental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and nonelectronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional percussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music - tom-toms, bongos, slapsticks, maracas-are widely used.
In the search for novel sounds, increased use has been made in Western music of microtones. Non-western music typically divides and interval between two pitches more finely than western music does, thereby producing a greater number of distinct tones, or microtones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters - closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well. Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium.
Because standard music notation makes no provision for many of these innovations, recent music scores may contain graphlike diagrams, new note shapes and symbols, and novel ways of arranging notation on the page. | 4271.txt | 0 |
[
"microtones",
"tom-toms and bongos",
"pianos",
"hisses"
] | According to the passage , which of the following would be considered traditional elements of Western music? | Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varèse (1883-1965) called thus the "liberation of sounD..the right to make music with any and all sounds." Electronic music, for example - made with the aid of computers, synthesizers, and electronic instruments - may include sounds that in the past would not have been considered musical. Environmental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and nonelectronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional percussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music - tom-toms, bongos, slapsticks, maracas-are widely used.
In the search for novel sounds, increased use has been made in Western music of microtones. Non-western music typically divides and interval between two pitches more finely than western music does, thereby producing a greater number of distinct tones, or microtones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters - closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well. Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium.
Because standard music notation makes no provision for many of these innovations, recent music scores may contain graphlike diagrams, new note shapes and symbols, and novel ways of arranging notation on the page. | 4271.txt | 2 |
[
"chart the history of innovation in musical notation",
"explain the logic of standard musical notation",
"design and develop electronic instruments",
"indicate how particular sounds should be produced"
] | In paragraph 3, the author mentions diagrams as an example of a new way to | Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varèse (1883-1965) called thus the "liberation of sounD..the right to make music with any and all sounds." Electronic music, for example - made with the aid of computers, synthesizers, and electronic instruments - may include sounds that in the past would not have been considered musical. Environmental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and nonelectronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional percussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music - tom-toms, bongos, slapsticks, maracas-are widely used.
In the search for novel sounds, increased use has been made in Western music of microtones. Non-western music typically divides and interval between two pitches more finely than western music does, thereby producing a greater number of distinct tones, or microtones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters - closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well. Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium.
Because standard music notation makes no provision for many of these innovations, recent music scores may contain graphlike diagrams, new note shapes and symbols, and novel ways of arranging notation on the page. | 4271.txt | 3 |
[
"believes that longer working hours is better",
"prefers shorter working hours to longer ones",
"says nothing certain about which pattern is better",
"thinks neither of the patterns is good"
] | From the text we know that the autor. | Among rich countries , people in the United States work the longest hours. T hey work much longer than in Europe. This difference is quite surprising because productivity per hour worked is the same in the United States as it is in France, Spain and Germany, and it is growing at a similar speed.
In most countries and at most times in history, as people have become richer they have chosen to work less. In other words they have decided to "spend"a part of their extra income on a fuller personal life. Over the last fifty years Europeans have continued this pattern, and hours of work have fallen sharply. But not in the United States. We do not fully know why this is. One reason may be more satisfying work,or less satisfying personal lives.
Longer hourd do of course increase the GDP . So the United States has produced more per worker than, say,France.The United States also has more of its people at work,while in Frence many more mothers and older workers have decided to stay at home.The overall result is that American GDP per head is 40% higher than in France,even though productivity per hour worked is the same.
It is not clear which of the two situations is better.As we have seen, work has to be compared with other values like family life, which often get lost in interest.It is too erly to explain the different trendsin happiness over time in different countries. But it is a disappointingidea that in the United States happiness has made no progress since 1975, while it has resen in Europe. Could this have anything to do with trends in the work-life balance ? | 3279.txt | 2 |
[
"Spain.",
"France.",
"Germany.",
"America."
] | Which of the following countries has mone of its pcople at work? | Among rich countries , people in the United States work the longest hours. T hey work much longer than in Europe. This difference is quite surprising because productivity per hour worked is the same in the United States as it is in France, Spain and Germany, and it is growing at a similar speed.
In most countries and at most times in history, as people have become richer they have chosen to work less. In other words they have decided to "spend"a part of their extra income on a fuller personal life. Over the last fifty years Europeans have continued this pattern, and hours of work have fallen sharply. But not in the United States. We do not fully know why this is. One reason may be more satisfying work,or less satisfying personal lives.
Longer hourd do of course increase the GDP . So the United States has produced more per worker than, say,France.The United States also has more of its people at work,while in Frence many more mothers and older workers have decided to stay at home.The overall result is that American GDP per head is 40% higher than in France,even though productivity per hour worked is the same.
It is not clear which of the two situations is better.As we have seen, work has to be compared with other values like family life, which often get lost in interest.It is too erly to explain the different trendsin happiness over time in different countries. But it is a disappointingidea that in the United States happiness has made no progress since 1975, while it has resen in Europe. Could this have anything to do with trends in the work-life balance ? | 3279.txt | 3 |
[
"The GDP of Europe is higher than that of America.",
"Two possible reasons are given for working longer hours in the US.",
"People all over the world choose to work less when they are richer.",
"Amerleans are happler than Europeans."
] | What message can we get from the text? | Among rich countries , people in the United States work the longest hours. T hey work much longer than in Europe. This difference is quite surprising because productivity per hour worked is the same in the United States as it is in France, Spain and Germany, and it is growing at a similar speed.
In most countries and at most times in history, as people have become richer they have chosen to work less. In other words they have decided to "spend"a part of their extra income on a fuller personal life. Over the last fifty years Europeans have continued this pattern, and hours of work have fallen sharply. But not in the United States. We do not fully know why this is. One reason may be more satisfying work,or less satisfying personal lives.
Longer hourd do of course increase the GDP . So the United States has produced more per worker than, say,France.The United States also has more of its people at work,while in Frence many more mothers and older workers have decided to stay at home.The overall result is that American GDP per head is 40% higher than in France,even though productivity per hour worked is the same.
It is not clear which of the two situations is better.As we have seen, work has to be compared with other values like family life, which often get lost in interest.It is too erly to explain the different trendsin happiness over time in different countries. But it is a disappointingidea that in the United States happiness has made no progress since 1975, while it has resen in Europe. Could this have anything to do with trends in the work-life balance ? | 3279.txt | 1 |
[
"Americans and Europeans",
"Staying at Home",
"Work and Productivity",
"Work and Happiness"
] | Which of the following would be the best title for the text? | Among rich countries , people in the United States work the longest hours. T hey work much longer than in Europe. This difference is quite surprising because productivity per hour worked is the same in the United States as it is in France, Spain and Germany, and it is growing at a similar speed.
In most countries and at most times in history, as people have become richer they have chosen to work less. In other words they have decided to "spend"a part of their extra income on a fuller personal life. Over the last fifty years Europeans have continued this pattern, and hours of work have fallen sharply. But not in the United States. We do not fully know why this is. One reason may be more satisfying work,or less satisfying personal lives.
Longer hourd do of course increase the GDP . So the United States has produced more per worker than, say,France.The United States also has more of its people at work,while in Frence many more mothers and older workers have decided to stay at home.The overall result is that American GDP per head is 40% higher than in France,even though productivity per hour worked is the same.
It is not clear which of the two situations is better.As we have seen, work has to be compared with other values like family life, which often get lost in interest.It is too erly to explain the different trendsin happiness over time in different countries. But it is a disappointingidea that in the United States happiness has made no progress since 1975, while it has resen in Europe. Could this have anything to do with trends in the work-life balance ? | 3279.txt | 3 |
[
"The creation of the urban middle class",
"Domestic work at the turn of the century",
"The spread of electrical power in the United States",
"Overcrowding in American cities."
] | What is the main topic of the passage ? | By the turn of the century, the middle-class home in North American had been transformed. "The flow of industry has passed and left idle the loom in the attic, the soap kettle in the shed," Ellen Richards wrote in 1908. The urban middle class was now able to buy a wide array of food products and clothing - baked goods, canned goods, suits, shirts, shoes, and dresses. Not only had household production waned, but technological improvements were rapidly changing the rest of domestic work. Middle-class homes had indoor running water and furnaces, run on oil, coal, or gas, that produced hot water. Stoves were fueled by gas, and delivery services provided ice for refrigerators. Electric power was available for lamps, sewing machines, irons, and even vacuum cleaners. No domestic task was unaffected. Commercial laundries, for instance, had been doing the wash for urban families for decades; by the early 1900's the first electric washing machines were on the market.
One impact of the new household technology was to draw sharp dividing lines between women of different classes and regions. Technological advances always affected the homes of the wealthy first, filtering downward into the urban middle class. But women who lived on farms were not yet affected by household improvements. Throughout the nineteenth century and well into the twentieth, rural homes lacked running water and electric power. Farm women had to haul large quantities of water into the house from wells or pumps for every purpose. Doing the family laundry, in large vats heated over stoves, continued to be a full day's work, just as canning and preserving continued to be seasonal necessities. Heat was provided by wood or coal stoves. In addition, rural women continued to produce most of their families' clothing. The urban poor, similarly, reaped few benefits from household improvements. Urban slums such as Chicago's nineteenth ward often had no sewers, garbage collection, or gas or electric lines; and tenements lacked both running water and central heating. At the turn of the century, variations in the nature of women's domestic work were probably more marked than at any time before. | 1687.txt | 1 |
[
"oil",
"coal",
"gas",
"wood"
] | According to the passage , what kind of fuel was used in a stove in a typical middle-class household? | By the turn of the century, the middle-class home in North American had been transformed. "The flow of industry has passed and left idle the loom in the attic, the soap kettle in the shed," Ellen Richards wrote in 1908. The urban middle class was now able to buy a wide array of food products and clothing - baked goods, canned goods, suits, shirts, shoes, and dresses. Not only had household production waned, but technological improvements were rapidly changing the rest of domestic work. Middle-class homes had indoor running water and furnaces, run on oil, coal, or gas, that produced hot water. Stoves were fueled by gas, and delivery services provided ice for refrigerators. Electric power was available for lamps, sewing machines, irons, and even vacuum cleaners. No domestic task was unaffected. Commercial laundries, for instance, had been doing the wash for urban families for decades; by the early 1900's the first electric washing machines were on the market.
One impact of the new household technology was to draw sharp dividing lines between women of different classes and regions. Technological advances always affected the homes of the wealthy first, filtering downward into the urban middle class. But women who lived on farms were not yet affected by household improvements. Throughout the nineteenth century and well into the twentieth, rural homes lacked running water and electric power. Farm women had to haul large quantities of water into the house from wells or pumps for every purpose. Doing the family laundry, in large vats heated over stoves, continued to be a full day's work, just as canning and preserving continued to be seasonal necessities. Heat was provided by wood or coal stoves. In addition, rural women continued to produce most of their families' clothing. The urban poor, similarly, reaped few benefits from household improvements. Urban slums such as Chicago's nineteenth ward often had no sewers, garbage collection, or gas or electric lines; and tenements lacked both running water and central heating. At the turn of the century, variations in the nature of women's domestic work were probably more marked than at any time before. | 1687.txt | 2 |
[
"the electric fan",
"the refrigerator",
"the electric light",
"the washing machine"
] | Which of the following is NOT mentioned as a household convenience in the passage ? | By the turn of the century, the middle-class home in North American had been transformed. "The flow of industry has passed and left idle the loom in the attic, the soap kettle in the shed," Ellen Richards wrote in 1908. The urban middle class was now able to buy a wide array of food products and clothing - baked goods, canned goods, suits, shirts, shoes, and dresses. Not only had household production waned, but technological improvements were rapidly changing the rest of domestic work. Middle-class homes had indoor running water and furnaces, run on oil, coal, or gas, that produced hot water. Stoves were fueled by gas, and delivery services provided ice for refrigerators. Electric power was available for lamps, sewing machines, irons, and even vacuum cleaners. No domestic task was unaffected. Commercial laundries, for instance, had been doing the wash for urban families for decades; by the early 1900's the first electric washing machines were on the market.
One impact of the new household technology was to draw sharp dividing lines between women of different classes and regions. Technological advances always affected the homes of the wealthy first, filtering downward into the urban middle class. But women who lived on farms were not yet affected by household improvements. Throughout the nineteenth century and well into the twentieth, rural homes lacked running water and electric power. Farm women had to haul large quantities of water into the house from wells or pumps for every purpose. Doing the family laundry, in large vats heated over stoves, continued to be a full day's work, just as canning and preserving continued to be seasonal necessities. Heat was provided by wood or coal stoves. In addition, rural women continued to produce most of their families' clothing. The urban poor, similarly, reaped few benefits from household improvements. Urban slums such as Chicago's nineteenth ward often had no sewers, garbage collection, or gas or electric lines; and tenements lacked both running water and central heating. At the turn of the century, variations in the nature of women's domestic work were probably more marked than at any time before. | 1687.txt | 0 |
[
"Farm women",
"The urban poor",
"The urban middle class",
"The wealthy"
] | According to the passage , who were the first beneficiaries of technological advances? | By the turn of the century, the middle-class home in North American had been transformed. "The flow of industry has passed and left idle the loom in the attic, the soap kettle in the shed," Ellen Richards wrote in 1908. The urban middle class was now able to buy a wide array of food products and clothing - baked goods, canned goods, suits, shirts, shoes, and dresses. Not only had household production waned, but technological improvements were rapidly changing the rest of domestic work. Middle-class homes had indoor running water and furnaces, run on oil, coal, or gas, that produced hot water. Stoves were fueled by gas, and delivery services provided ice for refrigerators. Electric power was available for lamps, sewing machines, irons, and even vacuum cleaners. No domestic task was unaffected. Commercial laundries, for instance, had been doing the wash for urban families for decades; by the early 1900's the first electric washing machines were on the market.
One impact of the new household technology was to draw sharp dividing lines between women of different classes and regions. Technological advances always affected the homes of the wealthy first, filtering downward into the urban middle class. But women who lived on farms were not yet affected by household improvements. Throughout the nineteenth century and well into the twentieth, rural homes lacked running water and electric power. Farm women had to haul large quantities of water into the house from wells or pumps for every purpose. Doing the family laundry, in large vats heated over stoves, continued to be a full day's work, just as canning and preserving continued to be seasonal necessities. Heat was provided by wood or coal stoves. In addition, rural women continued to produce most of their families' clothing. The urban poor, similarly, reaped few benefits from household improvements. Urban slums such as Chicago's nineteenth ward often had no sewers, garbage collection, or gas or electric lines; and tenements lacked both running water and central heating. At the turn of the century, variations in the nature of women's domestic work were probably more marked than at any time before. | 1687.txt | 3 |
[
"gained",
"affected",
"wanted",
"accepted"
] | The word "reaped" in line 23 is closest in meaning to | By the turn of the century, the middle-class home in North American had been transformed. "The flow of industry has passed and left idle the loom in the attic, the soap kettle in the shed," Ellen Richards wrote in 1908. The urban middle class was now able to buy a wide array of food products and clothing - baked goods, canned goods, suits, shirts, shoes, and dresses. Not only had household production waned, but technological improvements were rapidly changing the rest of domestic work. Middle-class homes had indoor running water and furnaces, run on oil, coal, or gas, that produced hot water. Stoves were fueled by gas, and delivery services provided ice for refrigerators. Electric power was available for lamps, sewing machines, irons, and even vacuum cleaners. No domestic task was unaffected. Commercial laundries, for instance, had been doing the wash for urban families for decades; by the early 1900's the first electric washing machines were on the market.
One impact of the new household technology was to draw sharp dividing lines between women of different classes and regions. Technological advances always affected the homes of the wealthy first, filtering downward into the urban middle class. But women who lived on farms were not yet affected by household improvements. Throughout the nineteenth century and well into the twentieth, rural homes lacked running water and electric power. Farm women had to haul large quantities of water into the house from wells or pumps for every purpose. Doing the family laundry, in large vats heated over stoves, continued to be a full day's work, just as canning and preserving continued to be seasonal necessities. Heat was provided by wood or coal stoves. In addition, rural women continued to produce most of their families' clothing. The urban poor, similarly, reaped few benefits from household improvements. Urban slums such as Chicago's nineteenth ward often had no sewers, garbage collection, or gas or electric lines; and tenements lacked both running water and central heating. At the turn of the century, variations in the nature of women's domestic work were probably more marked than at any time before. | 1687.txt | 0 |
[
"analysis of a quotation",
"chronological narrative",
"extended definition",
"comparison and contrast"
] | Which of the following best characterizes the passage 's organization? | By the turn of the century, the middle-class home in North American had been transformed. "The flow of industry has passed and left idle the loom in the attic, the soap kettle in the shed," Ellen Richards wrote in 1908. The urban middle class was now able to buy a wide array of food products and clothing - baked goods, canned goods, suits, shirts, shoes, and dresses. Not only had household production waned, but technological improvements were rapidly changing the rest of domestic work. Middle-class homes had indoor running water and furnaces, run on oil, coal, or gas, that produced hot water. Stoves were fueled by gas, and delivery services provided ice for refrigerators. Electric power was available for lamps, sewing machines, irons, and even vacuum cleaners. No domestic task was unaffected. Commercial laundries, for instance, had been doing the wash for urban families for decades; by the early 1900's the first electric washing machines were on the market.
One impact of the new household technology was to draw sharp dividing lines between women of different classes and regions. Technological advances always affected the homes of the wealthy first, filtering downward into the urban middle class. But women who lived on farms were not yet affected by household improvements. Throughout the nineteenth century and well into the twentieth, rural homes lacked running water and electric power. Farm women had to haul large quantities of water into the house from wells or pumps for every purpose. Doing the family laundry, in large vats heated over stoves, continued to be a full day's work, just as canning and preserving continued to be seasonal necessities. Heat was provided by wood or coal stoves. In addition, rural women continued to produce most of their families' clothing. The urban poor, similarly, reaped few benefits from household improvements. Urban slums such as Chicago's nineteenth ward often had no sewers, garbage collection, or gas or electric lines; and tenements lacked both running water and central heating. At the turn of the century, variations in the nature of women's domestic work were probably more marked than at any time before. | 1687.txt | 3 |
[
"lines 3-5",
"lines 6-7",
"lines 8-9",
"lines 22-23"
] | Where in the passage does the author discuss conditions in poor urban neighborhoods? | By the turn of the century, the middle-class home in North American had been transformed. "The flow of industry has passed and left idle the loom in the attic, the soap kettle in the shed," Ellen Richards wrote in 1908. The urban middle class was now able to buy a wide array of food products and clothing - baked goods, canned goods, suits, shirts, shoes, and dresses. Not only had household production waned, but technological improvements were rapidly changing the rest of domestic work. Middle-class homes had indoor running water and furnaces, run on oil, coal, or gas, that produced hot water. Stoves were fueled by gas, and delivery services provided ice for refrigerators. Electric power was available for lamps, sewing machines, irons, and even vacuum cleaners. No domestic task was unaffected. Commercial laundries, for instance, had been doing the wash for urban families for decades; by the early 1900's the first electric washing machines were on the market.
One impact of the new household technology was to draw sharp dividing lines between women of different classes and regions. Technological advances always affected the homes of the wealthy first, filtering downward into the urban middle class. But women who lived on farms were not yet affected by household improvements. Throughout the nineteenth century and well into the twentieth, rural homes lacked running water and electric power. Farm women had to haul large quantities of water into the house from wells or pumps for every purpose. Doing the family laundry, in large vats heated over stoves, continued to be a full day's work, just as canning and preserving continued to be seasonal necessities. Heat was provided by wood or coal stoves. In addition, rural women continued to produce most of their families' clothing. The urban poor, similarly, reaped few benefits from household improvements. Urban slums such as Chicago's nineteenth ward often had no sewers, garbage collection, or gas or electric lines; and tenements lacked both running water and central heating. At the turn of the century, variations in the nature of women's domestic work were probably more marked than at any time before. | 1687.txt | 3 |
[
"They were not satisfied with American society.",
"They wanted to grow marijuana.",
"They wanted to go to the Vietnam War.",
"They did not want all people to be equal."
] | Why did some young Americans decide to "drop out" of scoiety during the 1960s? | In the 1960s, many young Americans were dissatisfied with American society. They wanted to end the Vietnam War and to make all of the people in the U.S. epual. Some of them decided to "drop out" of American society and form their own societies . They formed utopian communities , which they called "communes," where they could follow their philosophy of "do your own thing." A group of artists founded a commune in southern Colorado called "Drop City." Following the ideas of philosopher and architect Buckminster Fuller they built domeshaped houses from pieces of old cars. Other groups, such as author Ken Kesey's Merry Pranksters, the followers fo San Francisco poet Steve Gakin, and a group that called itself the Hog Farm, lived in old school huses and traveled around the United States. The Hog Farm become famous when they helped organize the Woodstock Rock Festival in 1969. Steve Gaskin's followers tried to settle down on a farm in Tennessee, but they had to leave when some members of the gruop were arrested for growing marijuana.
Not all communes believed in the philosophy of "do you own thing," however . Twin Oaks , a commune founded in Virgiania in the late 1960s, was based on the ideas of psychologist B.F.Skinner. The people who lived at Twin Oaks were carefully controlled by Skinner's "conditioning" techniques to do things that were good for the community. In 1972, Italian architect Paolo Soleri began to build Arcosanti, a utopian city Arizsona where 2500 people will live closely together in one large building called an "archology" Soleri believes that people must live closely together so that they will all become one. | 1624.txt | 0 |
[
"In dome-shaped house",
"In old school huses",
"On a farm inTennessee",
"In an archology in Arizona"
] | Where did the members of the Hog Farm commune live? | In the 1960s, many young Americans were dissatisfied with American society. They wanted to end the Vietnam War and to make all of the people in the U.S. epual. Some of them decided to "drop out" of American society and form their own societies . They formed utopian communities , which they called "communes," where they could follow their philosophy of "do your own thing." A group of artists founded a commune in southern Colorado called "Drop City." Following the ideas of philosopher and architect Buckminster Fuller they built domeshaped houses from pieces of old cars. Other groups, such as author Ken Kesey's Merry Pranksters, the followers fo San Francisco poet Steve Gakin, and a group that called itself the Hog Farm, lived in old school huses and traveled around the United States. The Hog Farm become famous when they helped organize the Woodstock Rock Festival in 1969. Steve Gaskin's followers tried to settle down on a farm in Tennessee, but they had to leave when some members of the gruop were arrested for growing marijuana.
Not all communes believed in the philosophy of "do you own thing," however . Twin Oaks , a commune founded in Virgiania in the late 1960s, was based on the ideas of psychologist B.F.Skinner. The people who lived at Twin Oaks were carefully controlled by Skinner's "conditioning" techniques to do things that were good for the community. In 1972, Italian architect Paolo Soleri began to build Arcosanti, a utopian city Arizsona where 2500 people will live closely together in one large building called an "archology" Soleri believes that people must live closely together so that they will all become one. | 1624.txt | 1 |
[
"Paolo Soleri",
"B.G.Skinner",
"Steve Gaskin",
"Buckminster Fuller"
] | Who gave the people of Drop City the idea to bulid dome-shaped house? | In the 1960s, many young Americans were dissatisfied with American society. They wanted to end the Vietnam War and to make all of the people in the U.S. epual. Some of them decided to "drop out" of American society and form their own societies . They formed utopian communities , which they called "communes," where they could follow their philosophy of "do your own thing." A group of artists founded a commune in southern Colorado called "Drop City." Following the ideas of philosopher and architect Buckminster Fuller they built domeshaped houses from pieces of old cars. Other groups, such as author Ken Kesey's Merry Pranksters, the followers fo San Francisco poet Steve Gakin, and a group that called itself the Hog Farm, lived in old school huses and traveled around the United States. The Hog Farm become famous when they helped organize the Woodstock Rock Festival in 1969. Steve Gaskin's followers tried to settle down on a farm in Tennessee, but they had to leave when some members of the gruop were arrested for growing marijuana.
Not all communes believed in the philosophy of "do you own thing," however . Twin Oaks , a commune founded in Virgiania in the late 1960s, was based on the ideas of psychologist B.F.Skinner. The people who lived at Twin Oaks were carefully controlled by Skinner's "conditioning" techniques to do things that were good for the community. In 1972, Italian architect Paolo Soleri began to build Arcosanti, a utopian city Arizsona where 2500 people will live closely together in one large building called an "archology" Soleri believes that people must live closely together so that they will all become one. | 1624.txt | 3 |
[
"The philosophy of \"do your own thing\"",
"Virginaia in the late 1960s",
"The ideas of psychologist",
"The belief that people must live closely togerher."
] | What was the Twin Oaks commune base on ? | In the 1960s, many young Americans were dissatisfied with American society. They wanted to end the Vietnam War and to make all of the people in the U.S. epual. Some of them decided to "drop out" of American society and form their own societies . They formed utopian communities , which they called "communes," where they could follow their philosophy of "do your own thing." A group of artists founded a commune in southern Colorado called "Drop City." Following the ideas of philosopher and architect Buckminster Fuller they built domeshaped houses from pieces of old cars. Other groups, such as author Ken Kesey's Merry Pranksters, the followers fo San Francisco poet Steve Gakin, and a group that called itself the Hog Farm, lived in old school huses and traveled around the United States. The Hog Farm become famous when they helped organize the Woodstock Rock Festival in 1969. Steve Gaskin's followers tried to settle down on a farm in Tennessee, but they had to leave when some members of the gruop were arrested for growing marijuana.
Not all communes believed in the philosophy of "do you own thing," however . Twin Oaks , a commune founded in Virgiania in the late 1960s, was based on the ideas of psychologist B.F.Skinner. The people who lived at Twin Oaks were carefully controlled by Skinner's "conditioning" techniques to do things that were good for the community. In 1972, Italian architect Paolo Soleri began to build Arcosanti, a utopian city Arizsona where 2500 people will live closely together in one large building called an "archology" Soleri believes that people must live closely together so that they will all become one. | 1624.txt | 2 |
[
"A person who studies archaeology",
"A large building where people live closely together",
"A city in A rizona",
"A technique to contorl people"
] | What is an "archology"? | In the 1960s, many young Americans were dissatisfied with American society. They wanted to end the Vietnam War and to make all of the people in the U.S. epual. Some of them decided to "drop out" of American society and form their own societies . They formed utopian communities , which they called "communes," where they could follow their philosophy of "do your own thing." A group of artists founded a commune in southern Colorado called "Drop City." Following the ideas of philosopher and architect Buckminster Fuller they built domeshaped houses from pieces of old cars. Other groups, such as author Ken Kesey's Merry Pranksters, the followers fo San Francisco poet Steve Gakin, and a group that called itself the Hog Farm, lived in old school huses and traveled around the United States. The Hog Farm become famous when they helped organize the Woodstock Rock Festival in 1969. Steve Gaskin's followers tried to settle down on a farm in Tennessee, but they had to leave when some members of the gruop were arrested for growing marijuana.
Not all communes believed in the philosophy of "do you own thing," however . Twin Oaks , a commune founded in Virgiania in the late 1960s, was based on the ideas of psychologist B.F.Skinner. The people who lived at Twin Oaks were carefully controlled by Skinner's "conditioning" techniques to do things that were good for the community. In 1972, Italian architect Paolo Soleri began to build Arcosanti, a utopian city Arizsona where 2500 people will live closely together in one large building called an "archology" Soleri believes that people must live closely together so that they will all become one. | 1624.txt | 1 |
[
"African American paintings in the 1920's",
"An arts movement of the 1920's",
"The influence of Alain Locke on African American art",
"Some ways in which African culture inspired American literature, art and music"
] | What does the passage mainly discuss? | The Harlem Renaissance, a movement of the 1920's, marked the twentieth century's first period of intense activity by African Americans in the field of literature, art, and music in the United States. The philosophy of the movement combined realism, ethnic consciousness, and Americanism. Encouraged by the example of certain Americans of European descent such as Thomas Eakins, Robert Henri, and George Luks, who had included persons of African descent in their paintings as serious studies rather than as trivial or sentimental stereotypes, African American artists of this period set about creating a new portrayal of themselves and their lives in the United States. As they began to strive for social and cultural independence. Their attitudes toward themselves changed, and, to some extent, other segments of American society began to change their attitudes toward them. Thus, though the Harlem Renaissance was a short-lived movement, its impact on American art and culture continues to the present.
The district in New York City known as Harlem was the capital of the movement. In 1925 an issue of Survey Graphic magazine devoted exclusively to Harlem and edited by philosopher Alain Locke became the manifesto of the African American artistic movement. Locke strongly suggested that individuals, while accepting their Americanism, take pride in their African ancestral arts and urged artists to look to Africa for substance and inspiration. Far from advocating a withdrawal from American culture, as did some of his contemporaries, Locke recommended a cultural pluralism through which artists could enrich the culture of America. African Americans were urged by Locke to be collaborators and participators with other Americans in art, literature, and music; and at the same time to preserve, enhance, and promote their own cultural heritage.
Artists and intellectuals from many parts of the United States and the Caribbean had been attracted to Harlem by the pulse and beat of its unique and dynamic culture. From this unity created by the convergence of artists from various social and geographical backgrounds came a new spirit, which, particularly in densely populated Harlem, was to result in greater group awareness and self-determination. African American graphic artists took their place beside the poets and writers of the Harlem Renaissance and carried on efforts to increase and promote the visual arts. | 372.txt | 1 |
[
"the philosophical contributions they made to the Harlem Renaissance",
"their development of a new style of African American art",
"they way in which they depicted African Americans in their paintings",
"their independence from European artistic traditions"
] | According to the passage , Tomas Eakins, Robert Henri, and George Luks were important because of | The Harlem Renaissance, a movement of the 1920's, marked the twentieth century's first period of intense activity by African Americans in the field of literature, art, and music in the United States. The philosophy of the movement combined realism, ethnic consciousness, and Americanism. Encouraged by the example of certain Americans of European descent such as Thomas Eakins, Robert Henri, and George Luks, who had included persons of African descent in their paintings as serious studies rather than as trivial or sentimental stereotypes, African American artists of this period set about creating a new portrayal of themselves and their lives in the United States. As they began to strive for social and cultural independence. Their attitudes toward themselves changed, and, to some extent, other segments of American society began to change their attitudes toward them. Thus, though the Harlem Renaissance was a short-lived movement, its impact on American art and culture continues to the present.
The district in New York City known as Harlem was the capital of the movement. In 1925 an issue of Survey Graphic magazine devoted exclusively to Harlem and edited by philosopher Alain Locke became the manifesto of the African American artistic movement. Locke strongly suggested that individuals, while accepting their Americanism, take pride in their African ancestral arts and urged artists to look to Africa for substance and inspiration. Far from advocating a withdrawal from American culture, as did some of his contemporaries, Locke recommended a cultural pluralism through which artists could enrich the culture of America. African Americans were urged by Locke to be collaborators and participators with other Americans in art, literature, and music; and at the same time to preserve, enhance, and promote their own cultural heritage.
Artists and intellectuals from many parts of the United States and the Caribbean had been attracted to Harlem by the pulse and beat of its unique and dynamic culture. From this unity created by the convergence of artists from various social and geographical backgrounds came a new spirit, which, particularly in densely populated Harlem, was to result in greater group awareness and self-determination. African American graphic artists took their place beside the poets and writers of the Harlem Renaissance and carried on efforts to increase and promote the visual arts. | 372.txt | 2 |
[
"Americans of European descent",
"paintings",
"African American artists",
"attitudes"
] | The word "them" in line 11 refers to | The Harlem Renaissance, a movement of the 1920's, marked the twentieth century's first period of intense activity by African Americans in the field of literature, art, and music in the United States. The philosophy of the movement combined realism, ethnic consciousness, and Americanism. Encouraged by the example of certain Americans of European descent such as Thomas Eakins, Robert Henri, and George Luks, who had included persons of African descent in their paintings as serious studies rather than as trivial or sentimental stereotypes, African American artists of this period set about creating a new portrayal of themselves and their lives in the United States. As they began to strive for social and cultural independence. Their attitudes toward themselves changed, and, to some extent, other segments of American society began to change their attitudes toward them. Thus, though the Harlem Renaissance was a short-lived movement, its impact on American art and culture continues to the present.
The district in New York City known as Harlem was the capital of the movement. In 1925 an issue of Survey Graphic magazine devoted exclusively to Harlem and edited by philosopher Alain Locke became the manifesto of the African American artistic movement. Locke strongly suggested that individuals, while accepting their Americanism, take pride in their African ancestral arts and urged artists to look to Africa for substance and inspiration. Far from advocating a withdrawal from American culture, as did some of his contemporaries, Locke recommended a cultural pluralism through which artists could enrich the culture of America. African Americans were urged by Locke to be collaborators and participators with other Americans in art, literature, and music; and at the same time to preserve, enhance, and promote their own cultural heritage.
Artists and intellectuals from many parts of the United States and the Caribbean had been attracted to Harlem by the pulse and beat of its unique and dynamic culture. From this unity created by the convergence of artists from various social and geographical backgrounds came a new spirit, which, particularly in densely populated Harlem, was to result in greater group awareness and self-determination. African American graphic artists took their place beside the poets and writers of the Harlem Renaissance and carried on efforts to increase and promote the visual arts. | 372.txt | 2 |
[
"themselves",
"other artists",
"their impact on American art",
"stereotypes"
] | According to the passage , African American artists of the 1920's differed from earlier African American artists in terms of their feelings about | The Harlem Renaissance, a movement of the 1920's, marked the twentieth century's first period of intense activity by African Americans in the field of literature, art, and music in the United States. The philosophy of the movement combined realism, ethnic consciousness, and Americanism. Encouraged by the example of certain Americans of European descent such as Thomas Eakins, Robert Henri, and George Luks, who had included persons of African descent in their paintings as serious studies rather than as trivial or sentimental stereotypes, African American artists of this period set about creating a new portrayal of themselves and their lives in the United States. As they began to strive for social and cultural independence. Their attitudes toward themselves changed, and, to some extent, other segments of American society began to change their attitudes toward them. Thus, though the Harlem Renaissance was a short-lived movement, its impact on American art and culture continues to the present.
The district in New York City known as Harlem was the capital of the movement. In 1925 an issue of Survey Graphic magazine devoted exclusively to Harlem and edited by philosopher Alain Locke became the manifesto of the African American artistic movement. Locke strongly suggested that individuals, while accepting their Americanism, take pride in their African ancestral arts and urged artists to look to Africa for substance and inspiration. Far from advocating a withdrawal from American culture, as did some of his contemporaries, Locke recommended a cultural pluralism through which artists could enrich the culture of America. African Americans were urged by Locke to be collaborators and participators with other Americans in art, literature, and music; and at the same time to preserve, enhance, and promote their own cultural heritage.
Artists and intellectuals from many parts of the United States and the Caribbean had been attracted to Harlem by the pulse and beat of its unique and dynamic culture. From this unity created by the convergence of artists from various social and geographical backgrounds came a new spirit, which, particularly in densely populated Harlem, was to result in greater group awareness and self-determination. African American graphic artists took their place beside the poets and writers of the Harlem Renaissance and carried on efforts to increase and promote the visual arts. | 372.txt | 0 |
[
"prepared",
"defined",
"permitted",
"encouraged"
] | The word "urged" in line 17 is closest in meaning to | The Harlem Renaissance, a movement of the 1920's, marked the twentieth century's first period of intense activity by African Americans in the field of literature, art, and music in the United States. The philosophy of the movement combined realism, ethnic consciousness, and Americanism. Encouraged by the example of certain Americans of European descent such as Thomas Eakins, Robert Henri, and George Luks, who had included persons of African descent in their paintings as serious studies rather than as trivial or sentimental stereotypes, African American artists of this period set about creating a new portrayal of themselves and their lives in the United States. As they began to strive for social and cultural independence. Their attitudes toward themselves changed, and, to some extent, other segments of American society began to change their attitudes toward them. Thus, though the Harlem Renaissance was a short-lived movement, its impact on American art and culture continues to the present.
The district in New York City known as Harlem was the capital of the movement. In 1925 an issue of Survey Graphic magazine devoted exclusively to Harlem and edited by philosopher Alain Locke became the manifesto of the African American artistic movement. Locke strongly suggested that individuals, while accepting their Americanism, take pride in their African ancestral arts and urged artists to look to Africa for substance and inspiration. Far from advocating a withdrawal from American culture, as did some of his contemporaries, Locke recommended a cultural pluralism through which artists could enrich the culture of America. African Americans were urged by Locke to be collaborators and participators with other Americans in art, literature, and music; and at the same time to preserve, enhance, and promote their own cultural heritage.
Artists and intellectuals from many parts of the United States and the Caribbean had been attracted to Harlem by the pulse and beat of its unique and dynamic culture. From this unity created by the convergence of artists from various social and geographical backgrounds came a new spirit, which, particularly in densely populated Harlem, was to result in greater group awareness and self-determination. African American graphic artists took their place beside the poets and writers of the Harlem Renaissance and carried on efforts to increase and promote the visual arts. | 372.txt | 3 |
[
"pride in African art",
"cultural pluralism",
"collaboration with other artists",
"withdrawal from American culture"
] | Alain Locke believed all of the following to be important to the African American artistic movement EXCEPT | The Harlem Renaissance, a movement of the 1920's, marked the twentieth century's first period of intense activity by African Americans in the field of literature, art, and music in the United States. The philosophy of the movement combined realism, ethnic consciousness, and Americanism. Encouraged by the example of certain Americans of European descent such as Thomas Eakins, Robert Henri, and George Luks, who had included persons of African descent in their paintings as serious studies rather than as trivial or sentimental stereotypes, African American artists of this period set about creating a new portrayal of themselves and their lives in the United States. As they began to strive for social and cultural independence. Their attitudes toward themselves changed, and, to some extent, other segments of American society began to change their attitudes toward them. Thus, though the Harlem Renaissance was a short-lived movement, its impact on American art and culture continues to the present.
The district in New York City known as Harlem was the capital of the movement. In 1925 an issue of Survey Graphic magazine devoted exclusively to Harlem and edited by philosopher Alain Locke became the manifesto of the African American artistic movement. Locke strongly suggested that individuals, while accepting their Americanism, take pride in their African ancestral arts and urged artists to look to Africa for substance and inspiration. Far from advocating a withdrawal from American culture, as did some of his contemporaries, Locke recommended a cultural pluralism through which artists could enrich the culture of America. African Americans were urged by Locke to be collaborators and participators with other Americans in art, literature, and music; and at the same time to preserve, enhance, and promote their own cultural heritage.
Artists and intellectuals from many parts of the United States and the Caribbean had been attracted to Harlem by the pulse and beat of its unique and dynamic culture. From this unity created by the convergence of artists from various social and geographical backgrounds came a new spirit, which, particularly in densely populated Harlem, was to result in greater group awareness and self-determination. African American graphic artists took their place beside the poets and writers of the Harlem Renaissance and carried on efforts to increase and promote the visual arts. | 372.txt | 3 |
[
"depended greatly on its interaction with other parts of the city",
"grew economically in a short period of time",
"was an exciting place to be",
"was in danger of losing population"
] | In mentioning "the pulse and beat" (line 25) of Harlem during the 1920's, the author is characterizing the district as one that | The Harlem Renaissance, a movement of the 1920's, marked the twentieth century's first period of intense activity by African Americans in the field of literature, art, and music in the United States. The philosophy of the movement combined realism, ethnic consciousness, and Americanism. Encouraged by the example of certain Americans of European descent such as Thomas Eakins, Robert Henri, and George Luks, who had included persons of African descent in their paintings as serious studies rather than as trivial or sentimental stereotypes, African American artists of this period set about creating a new portrayal of themselves and their lives in the United States. As they began to strive for social and cultural independence. Their attitudes toward themselves changed, and, to some extent, other segments of American society began to change their attitudes toward them. Thus, though the Harlem Renaissance was a short-lived movement, its impact on American art and culture continues to the present.
The district in New York City known as Harlem was the capital of the movement. In 1925 an issue of Survey Graphic magazine devoted exclusively to Harlem and edited by philosopher Alain Locke became the manifesto of the African American artistic movement. Locke strongly suggested that individuals, while accepting their Americanism, take pride in their African ancestral arts and urged artists to look to Africa for substance and inspiration. Far from advocating a withdrawal from American culture, as did some of his contemporaries, Locke recommended a cultural pluralism through which artists could enrich the culture of America. African Americans were urged by Locke to be collaborators and participators with other Americans in art, literature, and music; and at the same time to preserve, enhance, and promote their own cultural heritage.
Artists and intellectuals from many parts of the United States and the Caribbean had been attracted to Harlem by the pulse and beat of its unique and dynamic culture. From this unity created by the convergence of artists from various social and geographical backgrounds came a new spirit, which, particularly in densely populated Harlem, was to result in greater group awareness and self-determination. African American graphic artists took their place beside the poets and writers of the Harlem Renaissance and carried on efforts to increase and promote the visual arts. | 372.txt | 2 |
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