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
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.
【B17】
选项
A、comfortable
B、calm
C、quiet
D、excited
答案
C
解析
此处句意为“睡觉让他们保持______、躲开食肉动物;这是一条生存策略”。根据常 识可知,睡眠时,动物是安静的。故C.quiet符合题意,为正确答案。首先可以排除excited, 因为根据上下文和常识,睡眠不可能使动物兴奋、激动。comfortable“舒服的”,calm“冷静 的”,均不及C项合适,故排除。
转载请注明原文地址:https://kaotiyun.com/show/C6IZ777K
0
考研英语一
相关试题推荐
Doctorshavetreatedthefirstreportedcaseof"Internetaddictiondisorder"broughtonbyexcessiveuseofGoogleGlass.I
Theproblemwithtoday’shousingcrisis,politically,isthatitisjustnotallthatvisible.AttheendoftheSecondWorldWa
Ayoungconsultant’slifeistiring.A【C1】______weekstartsbeforedawnonMonday,witharushtotheairportanda【C2】______to
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
Manyareawareofthetremendouswasteofenergyinourenvironment,butfailtotakeadvantageofstraightforwardopportunities
Manyareawareofthetremendouswasteofenergyinourenvironment,butfailtotakeadvantageofstraightforwardopportunities
随机试题
A、营养输液B、输液剂C、电解质输液D、胶体输液E、脊椎腔注射剂右旋糖酐注射液属于
A.200kcalB.450kcalC.700kcalD.1150kcalE.1550kcal患者术后,给予肠外营养液10%葡萄糖注射液500ml,50%葡萄糖注射液250ml,20%脂肪乳250ml,8.5%复方氨基酸750ml,水溶性维生素1
最早应用的移植是
融资租赁合同的内容包括()。
甲公司的业务员胡某公出购货,向财务科借款2000元,出具借款收据。胡某公出购货过程中,向乙公司购货一批,取得盖有乙公司公章的发票一张,其后发现该发票记载的货物型号有错误。另外,在其购买一笔自用物品时,示意营业员开具办公用品发票。回单位后,胡某持该办公用品发
采用赊销和分期收款方式销售货物,纳税义务发生时间为合同约定的收款日期的当天。当取得发出货物凭证时,其账务处理为( )。
2014年A公司和B公司分别出资750万元和250万元设立C公司,A公司、B公司对C公司的持股比例分别、为75%和25%。C公司为A公司的予公司。2015年B公司对C公司增资500万元,增资后占C公司股权比例为35%。交易完成后,A公司仍控制C公司。C公司
李某在下夜班回家的路上,发现有人正盗窃工厂仓库中的生产器材,便上前阻拦。窃贼掏出匕首刺向李某,搏斗中,窃贼被李某用力推倒在地,头撞在被盗器材的铁角上当场死亡。李某的行为是()。
已知(F/A,10%,9)=13.579,(F/A,10%,11)=18.531,10年期、利率为10%的预付年金终值系数值为()。
关于数据库应用系统的需求分析工作,下列说法正确的是______。
最新回复
(
0
)