Scientists are not sure why we need sleep.

试卷相关题目

• 1Going without sleep is not dangerous for white rats.

  A.Right

  B.Wrong

  C.Not Mentioned

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• 2It took four days for Gardner to recover from the experiment.

  A.Right

  B.Wrong

  C.Not Mentioned

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• 3During the experiment, Gardner had trouble speaking clearly.

  A.Right

  B.Wrong

  C.Not Mentioned

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• 4During the experiment, Gardner slept for two hours every night.

  A.Right

  B.Wrong

  C.Not Mentioned

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• 5Randy Gardner studied the effects of over over-sleeping.

  A.Right

  B.Wrong

  C.Not Mentioned

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• 6People sleep less than they used to.

  A.Right

  B.Wrong

  C.Not Mentioned

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• 7Which of the following is NOT mentioned as one of the things that living longer might enable an individual to do、

  A.Spending more time with his family.

  B.Having more education.

  C.Realizing more dreams.

  D.Working longer.

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• 8Which of the following is implied in the sixth paragraph、

  A.Marriages in the US today are quite unstable.

  B.More and more people in the US today want to get married.

  C.Living longer would make it easier for people to maintain their marital ties.

  D.If people live longer ，they would stay in marriage longer.

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• 9All of the following are possible effects living longer might have on working life EXCEPT

  A.Communication between employers and employees would be more difficult.

  B.More money would be used by employees in payment of their employees.

  C.The job market would be more competitive.

  D.It would be more difficult for young people to be promoted to top positions.

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• 10An important feature of a society in which people live a long life is that

  A.it places more emphasis on educating the young.

  B.it is both wise and energeti

  C.C.it lacks the curiosity to experiment what is new.

  D.it welcomes changes.

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