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
34
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.
【B14】
选项
A、at least
B、at most
C、at best
D、at worst
答案
A
解析
本题考查上下文推理。at least意为“至少”;at most意为“最多”;at best意为“充其量,至多”;at worst意为“在最坏/最不利的情况下”。根据常识和上下文,我们知道睡眠和休息复原是有关系的。所以,首先排除B和C。这里讨论的是睡日民与休息复原的关系,不存在什么最坏最好情况的假设,所以D也排除。正确答案是A。句意是:“虽然我们不能准确地指出睡眠的功用,但它肯定至少在某些方面,与休息和复原有着直接或间接的关系。”
转载请注明原文地址:https://kaotiyun.com/show/qMIZ777K
0
考研英语一
相关试题推荐
Intheidealizedversionofhowscienceisdone,factsabouttheworldarewaitingtobeobservedandcollectedbyobjectiveres
Lonelypeople,itseems,areatgreaterriskthanthegregariousofdevelopingillnessesassociatedwithchronicinflammation,s
Theroughguidetomarketingsuccessusedtobethatyougotwhatyoupaidfor.Nolonger.Whiletraditional"paid"media—sucha
Manythingsmakepeoplethinkartistsareweird.Buttheweirdestmaybethis:artists’onlyjobistoexploreemotions,andyet
Americansnolongerexpectpublicfigures,whetherinspeechorinwriting,tocommandtheEnglishlanguagewithskillandgift.
Manyareawareofthetremendouswasteofenergyinourenvironment,butfailtotakeadvantageofstraightforwardopportunities
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchangesthatyoungadultsexperience.Andtheyalsoneed
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand1
AsValentine’sDayapproaches,manysinglepeoplebegintofeelalittlesorryforthemselves.Onaday【C1】______bycouples,thi
Maybeunemploymentisn’tsobadafterall.Anewstudysaysthathavingademanding,unstableandthanklessjobmaymakeyoueve
随机试题
死刑只适用于_______的犯罪分子。
有关开放性气胸首先应进行的处理应该是
A.胸部后前位B.胸部右侧位C.深呼气后屏气后前位D.左侧位E.前弓位气胸常用摄影体位是
在某些特定的环境中不可能属于环境噪声的是()。
某批发兼零售的居民企业,2010年度自行申报营业收入总额350万元,成本费用总额370万元,当年亏损20万元。经税务机关审核,该企业申报的收入总额无法核实,成本费用核算正确。假定对该企业采取核定征收企业所得税,应税所得率为8%,该居民企业2010年度应缴纳
触电伤员呼吸和心跳停止时,应立即按心肺复苏法抢救伤员,下列措施正确的是()。
A、12B、18C、9D、8D九宫格每行第二个数字乘以2的积加上第一项等于第三项,所以空缺项为28—2×10=8,选D。
(2001年)已知矩阵且矩阵X满足AXA+BXB=AXB+BXA+E,其中E是3阶单位阵,求X.
Whatdidtheydecidetodolastnight?
A、 B、 C、 D、 B图中是一个背着包的男子在使用复印机。(A)中的besteppingtoward…指的是正在向复印机走去,与图片不符。图中看不出复印机的插头是否已插上,所以(C)的表述不正确,包括
最新回复
(
0
)