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Two people can be considered friends so long as they care for each other and like
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By the stop-motion process, many separate shoals can be combined into a single image.（）
根据短文回答 41～45 题。
Eat More, weigh Less, Live Longer
Clever genetic detective work may have found out the reason why a near-starvation diet prolongs the life of many animals.
"It's very cool work，"says aging researcher Cynthia Kenyon of the University of California，San Francisc0."These mice eat all they want.10se weight and live longer.It's Like heaven."
Calorie restriction dramatically extends the lifespan of organisms as different as worms and rodents.Whether this works in humans is still unknown，partly because few people are willing to submit to such a strict diet
But many researchers hope they will be able to trigger the same effect with a drug once they understand how less food leads to a longer life.One theory is that eating less reduces the increase of harmful things that can damage cells.But Kahn's team wondered whether the animals simply benefit by becoming thin。
To find out，they used biology tricks to disrupt the insulin(胰岛素)receptor(受体)gene in lab mice—but only in their fat cells."Since insulin is needed to help fat cells store fat，these animals were protected against becoming fat，"explains Kahn.
This slight genetic change in a single tissue had dramatic effects.By three months of age，Kahn's modified mice had up t0 70 per cent less body fat than normal control mice，despite the fact that they ate 55 per cent more food per gram of body weight.
In addition，their lifespan increased.The average control mouse lived 753 days，while the thin rodents averaged a lifespan of 887 days.After three years，all the control mice had died，but one—quarter of the modified rodents were still alive.
"That they get these effects by just manipulating the fat cells is controversial，"says Leonard Guarente of the Massachusetts Institute of Technology, who studies calorie restriction and agin9.
But Guarente says Kahn has yet to prove that the same effect is responsible for increased lifespan in calorie-restricted anima.1s."It might be the same effect or there might be two routes to long life，"he points out，"and that would be very interesting."
第 41 题 Ronald Kahn and his colleagues can make mice live longer by（）.
请选择（2）处的最佳答案。
根据短文，回答 16～22 题。
阅读下面这篇短文，短文后列出了7个句子，请根据短文的内容帮每个句子做出判断。如果该句提供的是正确信息，请选A；如果该句提供的是错误信息请选B；如果该句的信息文章中没有提及，请选C。
The Science of Persuasion
If leadership consists of getting things done through others, then persuasion is one of the leader's essential tools. Many executives have assumed that this tool is beyond their grasp, available only to the charismatic (有魅力的) and the eloquent. Over the past several decades, though, experimental psychologists have learned which methods reliably lead people to concede, comply, or change. Their research shows that persuasion is governed by several principles that can be taught and applied.
The first principle is that people are more likely to follow someone who is similar to them than someone who is not. Wise managers, then, ask peers to help make their cases. Second, people are more willing to cooperate with those who are not only like them but who like them, as well. So it's worth the time to uncover real similarities and offer genuine praise.
Third, experiments confirm the intuitive truth that people tend to treat you the way you treat them．It's sound policy to do a favor before seeking one．Fourth，individuals are more likely to keep promises they make voluntarily and clearly．The message for managers here is to get commitments in writing．Fifth。studies show that people really do defer to(服从)experts：So before they attempt to exert influence，executives should take pains to establish their own expertise and not assume that it's self-evident．Finally，people want more of a commodity when it's scarce；it follows，then，that exclusive information is more persuasive than widely available data.
第 16 题 Experiments have confirmed the assumption of many executives.（）
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