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
2017-08-31
49
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.
【B18】
选项
A、coldness
B、warmth
C、darkness
D、shade
答案
C
解析
此处句意为“在发明电以前,人们至少在每天的某些时候不得不生活在______中”。 根据上文Before the advent of electricity(在发明电以前)和常识,可以直接选出正确答案C. darkness。coldness“冷,冷淡”,warmth“温暖,暖和”,shade“阴凉处,背阴”,均不符合题意, 故排除。
转载请注明原文地址:https://kaotiyun.com/show/R6IZ777K
0
考研英语一
相关试题推荐
"MoneyMattersonCampus"isarecentlyreleasedstudyonfinancialliteracyamongyoungadults.Itsupportsprovidingstudents
Theproblemwithtoday’shousingcrisis,politically,isthatitisjustnotallthatvisible.AttheendoftheSecondWorldWa
Theproblemwithtoday’shousingcrisis,politically,isthatitisjustnotallthatvisible.AttheendoftheSecondWorldWa
Ayoungconsultant’slifeistiring.A【C1】______weekstartsbeforedawnonMonday,witharushtotheairportanda【C2】______to
"AMZN"isafour-letterwordtomanybooksellers.Theonlineretailerhasbeen【C1】______ofkillingthebooksellingindustry.It
Whatdoesthehamburgersayaboutourmodemfoodeconomy?Alot,actually.OverthepastseveralyearsWaldoJaquithintendedto
Consumersandproducersobviouslymakedecisionsthatmoldtheeconomy,butthereisathirdmajor【C1】______toconsider,therol
Consumersandproducersobviouslymakedecisionsthatmoldtheeconomy,butthereisathirdmajor【C1】______toconsider,therol
Thefollowingparagraphsaregiveninawrongorder.ForQuestions1-5,youarerequiredtoreorganizetheseparagraphsintoac
Manyareawareofthetremendouswasteofenergyinourenvironment,butfailtotakeadvantageofstraightforwardopportunities
随机试题
血小板来源于
患者,女,61岁。头痛经久不愈,痛处固定不移,痛如锥剌,舌紫暗有瘀斑,苔薄白,脉细涩。其最佳的治法为
下列关于工程项目的特征的表述中,不正确的是()。
某承包商承建一基础设施项目,其施工网络进度计划如图2—1所示。工程实施到第5个月末检查时,A2工作刚好完成,B1工作已进行了1个月。在施工过程中发生了如下事件。事件1:A1工作施工半个月发现业主提供的地质资料不准确,经与业主、设计单位协商确认,将原设
预先披露的招股说明书(申报稿)也是发行人发行股票的正式文件,含有价格信息,发行人要据此发行股票。()
“人只有受过一种合适的教育之后,人才能成为一个人”,这说明教育是()。
科学社会主义理论的两大理论基石是()。
利用伪基站实施犯罪是电信诈骗的一种典型形式。某市公安局110指挥中心连续接到群众报案称,在接收到95599农行积分兑换现金的短信并按照短信提示操作后,发现自己银行卡内的钱被转走。多位事主收到短信时,位置分布在主城区华山路、长江路、解放路、黄河路、并州路等方
"Flexibility"hasbecomeakeymetaphorpotentlyvivifyingavarietyofcontemporarylifediscourses.【F1】Ascapitalbecomesmore
MostradioandtelevisionstationsintheUnitedStatesarecommercialstations,【C1】______istosay,theyearntheirmoneyfrom【
最新回复
(
0
)