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, 【C1】______, is actually about t
The Earth’s daily clock, measured in a single revolution, is twenty-four hours. The human clock, 【C1】______, is actually about t
admin
2018-01-31
37
问题
The Earth’s daily clock, measured in a single revolution, is twenty-four hours. The human clock, 【C1】______, is actually about twenty-five hours. That’ s【C2】______scientists who study sleep have determined from human subjects who live for several weeks in observation chambers with no【C3】______of day or night. Sleep researchers have【C4】______other surprising discoveries as well.
We spend about one-third of our lives asleep, a fact that suggests sleeping, 【C5】______eating and breathing, is a fundamental life process. Yet some people almost never sleep, getting by on as【C6】______as fifteen minutes a day. And more than seventy years of【C7】______into sleep deprivation, in which people have been kept【C8】______for three to ten days, has【C9】______only one certain finding: Sleep loss makes a person sleepy and that’s about all; it causes no lasting ill【C10】______. Too much sleep, however, may be【C11】______for you.
These findings【C12】______some long-held views of sleep, and they【C13】______questions about its fundamental purpose in our lives. In【C14】______, scientists don’t know just why sleep is necessary.
Some scientists think sleep is more the result of evolutionary habit than【C15】______actual need, Animals sleep for some parts of the day perhaps because it is the【C16】______thing for them to do: it keeps them【C17】______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【C18】______and had little reason to question the reason or need for【C19】______. But the development of the electroencephalograph and the resulting discovery in 1937 of dramatic【C20】______in brain activity between sleep and wakefulness opened the way for scientific inquiry in the subject.
【C18】
选项
A、coldness
B、warmth
C、darkness
D、shade
答案
C
解析
本题考查名词辨析。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/pCBZ777K
0
考研英语一
相关试题推荐
[A]What,precisely,qualifiessomeoneasaworkaholic?There’sstillnosingleacceptedmedicaldefinition.Butpsychologistsh
Howstupiddoesoneneedtobetogetajobreadingthetelevisionnews?IsitactuallybeneficialforTVnewsreaderstohave,i
Howstupiddoesoneneedtobetogetajobreadingthetelevisionnews?IsitactuallybeneficialforTVnewsreaderstohave,i
Howstupiddoesoneneedtobetogetajobreadingthetelevisionnews?IsitactuallybeneficialforTVnewsreaderstohave,i
Dieting,accordingtoanoldjoke,maynotactuallymakeyoulivelonger,butitsurefeelsthatway.Nevertheless,evidencehas
The21stcenturyisacenturyofbiotechrevolution.【F1】Yetbeforehumanbeingsareabletofullyenjoythefruitsofthebiotec
随机试题
_____是对组织未来发展方向和目标的构想和设想,是对未来的展望和幢憬。
Theytalkedinwhispers,butstillIcouldn’thelpbut______theirconversation.
A.不必特殊处理B.西地兰0.4mg加入25%葡萄糖20ml,静脉缓慢推注C.皮下注射阿托品0.5mgD.门服地高辛0.25mg,每日1~2次E.少量多次输血冠心病人心室率每分钟50次以下者手术前
正常肺泡呼吸音最明显的听诊部位在
深静脉血栓最常见于
输液发生空气栓塞时应采取
排烟系统的风管板材厚度若设计无要求时,可按()系统风管板厚选择。
首次公开发行股票并在创业板上市的,持续督导的期间为证券上市当年剩余时间及其后______个完整会计年度;创业板上市公司发行新股、可转换公司债券的,持续督导的期间为证券上市当年剩余时间及其后______个完整会计年度。( )
2009年,某省全年粮食作物播种面积253.85万公顷,比上年增长1.5%;糖蔗种植面积13.58万公顷,下降0.2%;油料种植面积33.14万公顷,增长2.3%;蔬菜种植面积113.84万公顷,增长2.3%。下列作物2009年比2008年增产量最多
中国革命统一战线中,基本的、主要的联盟是()。
最新回复
(
0
)