Text 4 When you go to bed,is it because

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问题 Text 4 When you go to bed,is it because you're tured or because you need to get up at a certain time and want to make sure you get enough sleep?Everyone has a chronotype,which is the sleep cycle that their body would naturally prefer,if left to its own devices.But society forces its own chronotype on people,too.Maybe your prefer to sleep from 2 a.m.t0 10 a.m.But if you have a typical 9-to-5 workday,to get eight hours,you'd probably need to sleep from something like 11 p.m.t0 7 a,m.Individuals'sleep is surely shaped by their jobs,their families,and their habits.But a new study shows that society can shape sleep broadly,on a population level,as well.In the paper,published in Science Advances,Olivia Walch,Amy Cochran,and Daniel Forger of the University of Michigan look at data gathered from a smartphone app to see how sleep cycles vary in different countries and among different demographics.What country people lived in didn't have any noticeable effect on when they woke up,but it was linked to what time they went to bed.And what time they went to bed was linked to how much sleep they got.So in the countries that got less sleep on average,like Japan and Brazil,it was because they were going to bed later,not because they were waking up earlier than people in countries that got more sleep on average,like the Netherlands and Belgium,where people have earlier bedtimes.But it's notable in pointing out bedtime as a problem area.A lot of the research and discussion about the tension between sleep and society has focused on the morning-how the 9-to-5 workday isn't suitable for everyone's internal clocks,how starting the school day later can help teens,who have notoriously late chronotypes,how exposing yourself to light in the moming can help keep your intemal clock wound in a way that promotes good sleep.Bedtime,meanwhile,seems like it should be more of a choice.You wake up to go somewhere,or to start fulfilling responsibilities,and you go to bed when you decide to,based on a complex calculus of how tired you are,how much sleep you want to get,and whether the chapter you were just reading in your book ended on a cliffhanger.But when people are deciding to go to bed differs significantly across societies,it seems there's something cultural at play here,too.The paper published by the professors from University ofMichigan shows that____A.many people use smartphones before going to sleepB.the countries where people live may decide when they get upC.Japanese go to bed later and wake up laterD.people in some European countries enjoy longer sleep time

选项 A.many people use smartphones before going to sleep
B.the countries where people live may decide when they get up
C.Japanese go to bed later and wake up later
D.people in some European countries enjoy longer sleep time

答案 D

解析推理判断题。‘根据定位词定位到第三、四段。第四段关于密歇根大学的研究成果中，荷兰和比利时的人唾得时间较长，可知一些欧洲国家的人睡眠时间较长，故D项为正确选项。【干扰排除】第三段提到用智能手机应用程序采集数据，所以A项不正确；该教授调查了不同国家人们的睡眠情况，但没有提到国家决定他们起床的时间，故B项不正确；第四段提到日本人睡得晚，但没有说他们醒得也晚，所以C项不正确。

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Text 4 When you go to bed,is it because

英语二研究生

研究生入学