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11.March 21has been declared World Sleep Day,a time to recognize and celebrate the value of sleep.Many sleep experts hope it will be a wake-up call.
According to a poll (民意调查)by the National Sleep Foundation,nearly 4in 5Americans don't get as much sleep as they should during the workweek.On average,adults are thought to need at least eight hours of sleep a night,although some can manage with less and some won't do well without more.But the survey found that,on workdays,only 21% of Americans actually get a full eight hours of sleep,and another 21% get less than six.
To many of us,the thought of spending more time sleeping is,well,a big yawn.On the other hand,the thought of being smarter,thinner,healthier and more cheerful has a certain appeal.And those are just a few of the advantages that can be ours if we consistently get enough sleep,researchers say.Also on the plus side:We're likely to have better skin,better memories,better judgment,and,oh,yes,longer lives.
"When you lose even one hour of sleep for any reason,it influences your performance the next day,"says Dr.Alon Avidan,director of the UCLA Sleep Disorders Center.
A study published last year found the same to be true even of children.When kids aged 8to 12slept for just one hour less for four nights,they didn't function as well during the day.
But sleeping has an image problem."We see napping or sleeping as lazy,"says Jennifer Vriend,a clinical psychologist in Ottawa,Canada,and the leading author of the study with children."We put so much emphasis on diet,nutrition and exercise.Sleep is in the back seat."In fact,she adds,no matter how much we work out,no matter how well we eat,we can't be in top physical shape unless we also get plenty of sleep.

21.The underlined part in Paragraph 1meansB.
A.to wake up the sleepers
B.to draw people's attention
C.to serve as a morning call
D.to declare the special day
22.From Paragraph 3we can infer thatD.
A.being healthier is one of the advantages for us
B.sleeping has nothing to do with one's expectations
C.spending more time on sleeping is a waste of time
D.enough sleep is the guarantee of the appealing things
23.What Jennifer Vriend said in the last paragraph implies thatB.
A.sleeping is an image problem
B.people care little about sleeping
C.lazy people tend to sleep long
D.sleeping is only part of our life
24.What is the purpose of the passage?C
A.to talk about people's sleeping problems.
B.to provide an investigation result of sleeping.
C.to arouse the awareness of enough sleeping.
D.to stress the function of sleeping at night.

分析 3月21日为世界睡眠日,作者希望这个日子能引起大家的关注.文章通过美国睡眠协会的一个民意调查发现大部分美国人在工作日期间睡眠是不够的,论述了睡眠和工作、学习之间的关系以及产生的影响,最后得出结论,好的睡眠是好身体的保证.

解答 21.答案:B.短语猜测题.根据下文中民意调查的发现:大部分美国人在工作日睡眠不足,以及之后谈论充足睡眠的重要性可知,专家希望通过睡眠日引起大家对睡眠的重视.故选B.
22.答案:D.推理判断题.根据第三段第三句中的"And those are just a few of the advantages that can be ours if we consistently get enough sleep"可知,这些只是我们的一些优势,如果我们始终得到足够的睡眠.故选D.
23.答案:B.细节理解题.根据Jennifer Vriend说的话可知,我们把睡觉视为懒惰.我们注重饮食、营养和运动,却不重视睡眠.故选B.
24.答案:C.主旨大意题.根据文章第一段和最后一段可知,本文主要目的是引起人们对睡眠的重视,故选D.

点评 本文是一篇说明文,题目涉及短语猜测题,推理判断题,细节理解题,主旨大意题,做题时应结合文章上下文内容并根据所给选项的含义进行分析,从而得出正确答案.切记胡乱猜测,一定要做到有理有据.

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