____ greater control and a stronger sense of achievement, active learners are able to gain new skills fasters and ____ what they know to better use.

A. Under, take B. With, make　 C. Under, bring D. With, put

 

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Although the weathermen’s forecasts for a month ahead are only little better than guesswork, they are now making long-term forecasts into the next century with growing confidence. The main trend in the world’s climate in the coming years will, scientists say, be a predictable result of man’s activities.
At the start of the industrial revolution nearly two centuries ago, man set off a big experiment in planetary engineering. Unaware of what he was doing, he spared no thought for the consequences. Today the possible outcome is alarmingly clear, but the experiment is unstoppable. Within the lifetime of many of us, the Earth may become warmer than it has been for a thousand years. By the middle of this century it may be warmer than it has been since the last Ice Age.
A warmer climate may seem welcome, but it could bring many dangers： damages to crops in the world’s main food-producing areas, famine(饑荒),  economic instability, civil unrest and even war.
In the much longer term, melting of the great ice-caps of Greenland and Antarctica could raise sea-levels throughout the world. The average sea-level has already risen a foot since the turn of the last century, and if the ice-caps disappear completely, it would rise by nearly 200 feet. Complete melting might take many centuries, but even a small increase in sea-level would threaten low-lying parts of the world such as the Netherlands.
44. Long-term weather forecasts beyond the year 2050 may seem strange because ____.
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B. weathermen can even forecast next month’s weather correctly
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　　A new study has found that it may be possible to train people to be more intelligent，increasing the brainpower they had at birth.
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Although the weathermen’s forecasts for a month ahead are only little better than guesswork, they are now making long-term forecasts into the next century with growing confidence. The main trend in the world’s climate in the coming years will, scientists say, be a predictable result of man’s activities.

At the start of the industrial revolution nearly two centuries ago, man set off a big experiment in planetary engineering. Unaware of what he was doing, he spared no thought for the consequences. Today the possible outcome is alarmingly clear, but the experiment is unstoppable. Within the lifetime of many of us, the Earth may become warmer than it has been for a thousand years. By the middle of this century it may be warmer than it has been since the last Ice Age.

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D. no one can stop engineering experiments

45. Weathermen believe that our future climate will be the direct result of ____.

A. the big scientific experiment       B. clever long-term forecasts

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46. One of the results of a warmer world climate could be ____.

A. an increase in food production

B. greater co-operation between countries

C. the death of millions of people from starvation

D. a reduction in the amount of oil we use

47. Scientists are fairly sure that by the year 2050, _______.

A. the sea-level will have risen obviously

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A new study has found that it may be possible to train people to be more intelligent, increasing the brainpower they had at birth．

Until now，it has been widely assumed that the kind of mental ability that allows us to solve new problems without having any relevant previous experience—what psychologists call fluid intelligence—is innate and cannot be taught（though people can raise their grades on tests of it by practicing）．

But in the new study，researchers describe a method for improving this skill，along with experiments to prove it works．

The key, researchers found, was carefully structured training in working memory—the kind that allows memorization of a telephone number just long enough to dial it．This type of memory is closely related to fluid intelligence，so the researchers reasoned that improving it might lead to improvements in fluid intelligence．

First they measured fluid intelligence of volunteers using standard tests．Then they trained each in a complicated memory task—the child’s card game，in which they had to recall a card they saw and heard．During the course, they needed to ignore irrelevant items, monitor ongoing performance，manage two tasks at the same time and connect related items to one another in space and time．

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A.memorizing telephone numbers        B.improving working memory

C.training in concentration                             D.recalling a card

2..The following aspects of the training help increase intelligence EXCEPT___________．

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C.managing two tasks at the same time                   D.using previous experience

3..When the experiment was conducted, the researchers______________．

A.trained the four groups for the same period of time

B.only made comparisons between the four groups

C.compared the four groups with control groups

D.trained the four groups together

4..By writing the article，the writer intends to ______________．

A.inform the readers of a new study

B.call on people to be trained to increase intelligence

C.prove one’s born brainpower can be improved

D.tell people the improved intelligence will last forever

 

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Although the weathermen’s forecasts for a month ahead are only little better than guesswork, they are now making long-term forecasts into the next century with growing confidence. The main trend in the world’s climate in the coming years will, scientists say, be a predictable result of man’s activities.

At the start of the industrial revolution nearly two centuries ago, man set off a big experiment in planetary engineering. Unaware of what he was doing, he spared no thought for the consequences. Today the possible outcome is alarmingly clear, but the experiment is unstoppable. Within the lifetime of many of us, the Earth may become warmer than it has been for a thousand years. By the middle of this century it may be warmer than it has been since the last Ice Age.

A warmer climate may seem welcome, but it could bring many dangers： damages to crops in the world’s main food-producing areas, famine(饑荒),  economic instability, civil unrest and even war.

In the much longer term, melting of the great ice-caps of Greenland and Antarctica could raise sea-levels throughout the world. The average sea-level has already risen a foot since the turn of the last century, and if the ice-caps disappear completely, it would rise by nearly 200 feet. Complete melting might take many centuries, but even a small increase in sea-level would threaten low-lying parts of the world such as the Netherlands.

44. Long-term weather forecasts beyond the year 2050 may seem strange because ____.

A. none of us will be alive then

B. weathermen can even forecast next month’s weather correctly

C. weathermen can forecast much better than they used to

D. no one can stop engineering experiments

45. Weathermen believe that our future climate will be the direct result of ____.

A. the big scientific experiment       B. clever long-term forecasts

C. the melting of the ice-caps          D. planets changing course

46. One of the results of a warmer world climate could be ____.

A. an increase in food production

B. greater co-operation between countries

C. the death of millions of people from starvation

D. a reduction in the amount of oil we use

47. Scientists are fairly sure that by the year 2050, _______.

A. the sea-level will have risen obviously

B. there will have been the Third World War

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