首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
The Earth’ s daily clock, measured in a single revolution, is twenty-four hours. The human clock,【B1】______, is actually about t
The Earth’ s daily clock, measured in a single revolution, is twenty-four hours. The human clock,【B1】______, is actually about t
admin
2018-04-27
55
问题
The Earth’ s daily clock, measured in a single revolution, is twenty-four hours. The human clock,【B1】______, is actually about twenty-five hours. That’ s 【B2】______ scientists who study sleep have determined from human subjects who live for several weeks in observation chambers with no【B3】______of day or night. Sleep researchers have 【B4】______ other surprising discoveries as well.
We spend about one-third of our lives asleep, a fact that suggests sleeping, 【B5】______ eating and breathing, is a fundamental life process. Yet some people almost never sleep, getting by on as 【B6】______ as fifteen minutes a day. And more than seventy years of【B7】______into sleep deprivation, in which people have been kept【B8】______for three to ten days, has 【B9】______ only one certain finding: Sleep loss makes a person sleepy and that’ s about all; it causes no lasting ill【B10】______. Too much sleep, however, may be【B11】______for you.
These findings【B12】______some long-held views of sleep, and they【B13】______questions about its fundamental purpose in our lives. In【B14】______, scientists don’t know just why sleep is necessary..
Some scientists think sleep is more the result of evolutionary habit than【B15】______actual need, Animals sleep for some parts of the day perhaps because it is the 【B16】______ thing for them to do: it keeps them【B17】______and hidden from predators; it’s a survival tactic. Before the advent of electricity, humans had to spend at least some of each day in【B18】______and had little reason to question the reason or need for【B19】______. But the development of the electroencephalograph and the resulting discovery in 1937 of dramatic【B20】______in brain activity between sleep and wakefulness opened the way for scientific inquiry in the subject.
【B19】
选项
A、sleep
B、work
C、food
D、clothes
答案
A
解析
考查上下文语义。此处句意为“在发现电以前,人们至少在每天的某些时候不得不生活在黑暗中,所以人们没什么理由去质疑______的原因和需要”。根据上下文,可知A.sleep符合题意,为正确答案。work“工作”,food“食物”,clothes“衣服”,均不符合题意,故排除。
转载请注明原文地址:https://kaotiyun.com/show/p7BZ777K
0
考研英语一
相关试题推荐
Inspiteof"endlesstalkofdifference,"Americansocietyisanamazingmachineforhomogenizingpeople.Thereis"thedemocrat
High-qualitycustomerserviceispreachedbymany,butactuallykeepingcustomershappyiseasiersaidthandone.Shopperss
InatimeoflowacademicachievementbychildrenintheUnitedStates,manyAmericansareturningtoJapan,acountryofhigha
[A]Physicalchanges[B]Lowself-esteem[C]Emergingindependenceandsearchforidentity[D]Emotionalturbulence[E]Interest
Throughoutthislong,tenseelection,everyonehasfocusedonthepresidentialcandidatesandhowthey’llchangeAmerica.Rightl
AsValentine’sDayapproaches,manysinglepeoplebegintofeelalittlesorryforthemselves.Onaday【C1】______bycouples,thi
AsValentine’sDayapproaches,manysinglepeoplebegintofeelalittlesorryforthemselves.Onaday【C1】______bycouples,thi
AsValentine’sDayapproaches,manysinglepeoplebegintofeelalittlesorryforthemselves.Onaday【C1】______bycouples,thi
Consumerproductssuchasshampoosandsunscreens,evenonesboostedassafer,maycontainpotentiallyharmfulchemicalsnotlis
Consumerproductssuchasshampoosandsunscreens,evenonesboostedassafer,maycontainpotentiallyharmfulchemicalsnotlis
随机试题
挖沟槽、基坑需支挡土板时,其宽度按图示沟槽、基坑底宽,单面加()cm,双面加20cm计算。
甲肝的主要传染源为__________和__________,自__________至__________传染性较强。
筒箭毒碱的作用有
患者,女性,35岁。孕32周,突然全身抽搐,持续约2分钟,家人即将其送往医院检查:血压165/100mmlHg,胎头先露,胎心率145次/分。有不规律宫缩。该病例最有必要采取的辅助检查是
自然人是民法上的概念,自然人一定是公民,公民不一定是自然人。()
幼儿园教育活动的内容应根据教育目的,幼儿的实际水平和兴趣,以()为原则,有计划地选择和组织。
实现()是中国共产党人的一贯主张,是发展中国特色社会主义的重大任务。
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性()
(66)Highunemploymentrates,especialamongyoungworkers,haveledtoprotestsincountriesasvariedasLatvia,Chile,Greece
A、AcollectionofbirdfossilsfromAustralia.B、Photographsofcertainrarefossilexhibits.C、Someancientwallpaintingsfrom
最新回复
(
0
)