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 tw
The Earth’s daily clock, measured in a single revolution, is twenty-four hours. The human clock,【B1】______, is actually about tw
admin
2016-01-02
31
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.
【B16】
选项
A、worst
B、best
C、only
D、natural
答案
B
解析
此处句意为“动物在一天中的某些时候睡觉,可能是因为睡觉对于它们来说是______的事”。根据下文的hidden from predators(躲开食肉动物),it’s a survival tactic(这是一条生存策略)可知B.best符合题意,为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/5PsZ777K
0
考研英语一
相关试题推荐
探究科研领域的发展趋势——1996年英译汉及详解Thedifferencesinrelativegrowthofvariousareasofscientificresearchhaveseveralcauses.【F1】Som
Youprobablyhavealongmentallistofmomentsandfactsyouwishyoucouldremember—butactuallyyoucannot.Thegoodnews,【B1
Inthatmythicalera【B1】______childrenwereseenandnotheard,anddid【B2】______theyweretoldwithout【B3】______,everyoneknew
Inthatmythicalera【B1】______childrenwereseenandnotheard,anddid【B2】______theyweretoldwithout【B3】______,everyoneknew
【F1】TheAmericansociologistTalcottParsonsbelievedthatthetwomostimportantfunctionsofthemodernfamilyaretheprimary
Sciencefictionhasatendencytobecomesciencefact.SomethinglikeHal,theon-boardspaceshipcomputercapableofethicalde
TransatlanticfrictionbetweencompaniesandregulatorshasgrownasEurope’sdataguardianshavebecomemoreassertive.Frances
Twoofthemostcommonrumorsaboutimmigrantfamiliesarethattheydon’treallywanttobecomeAmericanandthatthey’readra
Youwereonabusinesstripseveraldaysagoandstayedatahotelforacoupleofdays.Unfortunatelywhenyoucameback,your
Mostofthefundamentalchangesinourmodernsocietyandwayoflifehavebeenbroughtabout,directlyorindirectly,bytechno
随机试题
在对流干燥操作中将空气加热的目的是()。
运动疗法主要包括
A.侏儒症B.呆小症C.肢端肥大症D.巨人症E.黏液性水肿幼年时甲状腺分泌不足可引起
石灰的使用过程应注意()。
职业道德规范中的“强化服务”对会计人员的要求有()。
下列不属于欧洲债券市场的参与者的是()。
分析下面谱例。要求:写出其旋律特点。
下列说法错误的是()。
关于PC机软件的描述中,以下哪个说法是错误的_______。
将汇编语言转换成机器语言程序的过程称为
最新回复
(
0
)