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
The Earth’s daily clock, measured in a single revolution, is twenty-four hours. The human clock, 【B1】______ , is actually about
admin
2017-10-23
76
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 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 yielded only one certain findings: Sleep loss makes a person sleepy and that’s about all; it causes no lasting ill 【B9】______ . Too much sleep, however, may be 【B10】______ for you.
These findings 【B11】______ some long-held views of sleep, and they raise questions about its fundamental purpose in our lives. In 【B12】______ , scientists don’t know just why sleep is necessary.
"We get sleepy, and when we sleep, that sleepiness is reversed," Dr. Howard Roffwarg of the University of Texas in Dallas explains. "We know sleep has a function, 【B13】______ we feel it has a function. We can’t put our finger on it, but it must, 【B14】______ in some way, direct or indirect, have to do with rest and restitution."
Other 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.
【B20】
选项
A、differences
B、similarities
C、resemblance
D、opposites
答案
A
解析
本题考查上下文推理。句意是:“但是,脑电图仪的发展,以及人们1937的发现——大脑活动在睡眠状态和清醒状态下存在着巨大的______,——为睡眠这一课题的科学研究开辟了道路。”根据上下文,四个选项中最符合句意的是A。
转载请注明原文地址:https://kaotiyun.com/show/gMIZ777K
0
考研英语一
相关试题推荐
Thefollowingparagraphsaregiveninawrongorder.ForQuestions1-5,youarerequiredtoreorganizetheseparagraphsintoac
Manyareawareofthetremendouswasteofenergyinourenvironment,butfailtotakeadvantageofstraightforwardopportunities
Manyareawareofthetremendouswasteofenergyinourenvironment,butfailtotakeadvantageofstraightforwardopportunities
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand1
Thoughnotbiologicallyrelated,friendsareas"related"asfourthcousins,sharingabout1%ofgenes.Thatis【C1】______astudy
AsValentine’sDayapproaches,manysinglepeoplebegintofeelalittlesorryforthemselves.Onaday【C1】______bycouples,thi
Overthelastdecade,demandforthemostcommoncosmeticsurgeryprocedures,likebreastenlargementsandnosejobs,hasincrea
Maybeunemploymentisn’tsobadafterall.Anewstudysaysthathavingademanding,unstableandthanklessjobmaymakeyoueve
Maybeunemploymentisn’tsobadafterall.Anewstudysaysthathavingademanding,unstableandthanklessjobmaymakeyoueve
随机试题
诊断骨折最可靠的方法是
轻型铁构件适用于结构厚度在()mm以内的构件。
空间曲线,在xOy平面的投影方程是()。
根据该行业中企业数量的多少、进入限制程度和产品差别,行业基本上可分为()。
甲、乙订立借款1万元的合同,但约定乙须“在合同订立20日后方能取款”。该借款合同属于()。
汉语中的颜色词很复杂。一方面,有的颜色词可以指一种以上的颜色,比如,【R71】________天其实是【R72】________色的天,【R73】________却是【R74】________色的草,而李白《将进酒》中“君不见高堂明镜悲白发,【R75】__
以下关于VB特点的叙述中,错误的是( )。
下面4个关于C语言的结论中错误的是()。
一间宿舍可住多个学生,则实体宿舍和学生之间的联系是()。
Technologyisanothergreatforceforchange.Inpart,technologyhascausedthepopulationexplosion;manyofuswon’tnowbea
最新回复
(
0
)