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

  开始考试点击查看答案
• 2It took four days for Gardner to recover from the experiment.

  A.Right

  B.Wrong

  C.Not Mentioned

  开始考试点击查看答案
• 3During the experiment, Gardner had trouble speaking clearly.

  A.Right

  B.Wrong

  C.Not Mentioned

  开始考试点击查看答案
• 4During the experiment, Gardner slept for two hours every night.

  A.Right

  B.Wrong

  C.Not Mentioned

  开始考试点击查看答案
• 5Randy Gardner studied the effects of over over-sleeping.

  A.Right

  B.Wrong

  C.Not Mentioned

  开始考试点击查看答案
• 6People sleep less than they used to.

  A.Right

  B.Wrong

  C.Not Mentioned

  开始考试点击查看答案
• 7Parents in the United States tend to ask their children

  A.to save food.

  B.to wash the dishes.

  C.not to waste foo

  D.D.not to eat too much.

  开始考试点击查看答案
• 8Why do American restaurants serve large portions、

  A.Because Americans associate quantity with value.

  B.Because Americans have big bellies.

  C.BecauseAmericans are good eaters.

  D.Bcause Americans are greedy.

  开始考试点击查看答案
• 9What happened in the 1970s、

  A.The US government recommended the amount of food a restaurant gave to a customer.

  B.Health experts persuaded restaurants to serve smaller portions.

  C.The United States produced more grain than neede

  D.D.The American waistline started to expand.

  开始考试点击查看答案
• 10What does the survey indicate、

  A.Many poor Americans want large portions.

  B.Twenty percent Americans want smaller portions.

  C.Fifty seven percent Americans earn $150,000 per year.

  D.Twenty three percent Americas earn less than $25,000 per year.

  开始考试点击查看答案