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
2016-11-11
25
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.
【B18】
选项
A、coldness
B、warmth
C、darkness
D、shade
答案
C
解析
本题考查上下文推理。根据上文“在发明电以前”和常识,可以直接选出正确答案C。相关部分的意思是:“在发明电以前,人们至少在每天的某些时候不得不生活在黑暗中。”
转载请注明原文地址:https://jikaoti.com/ti/lKT7FFFM
0
考研英语一
相关试题推荐
PublichealthofficialsgrapplingwiththeobesityepidemichavedebatedawiderangeofapproachestohelpingslimtheAmerican
Telecommuting,Internetshoppingandonlinemeetingsmaysaveenergyascomparedwithin-personalternatives,butasthedigital
IntheUnitedStates,thefirstdaynursery,wasopenedin1854.Nurserieswereestablishedinvariousareasduringthe【C1】_____
Muchoftheworldshouldgoonadietin2014.Morethanathirdofadults【C1】______wereestimatedtobe【C2】______orobesein20
Eatinghealthilycostsabout$1.50moreperpersondaily,accordingtothemostthoroughreviewyetoftheaffordabilityofahe
Insomecountries,societalandfamilialtreatmentoftheelderlyusuallyreflectsagreatdegreeofindependenceandindividual
Insomecountries,societalandfamilialtreatmentoftheelderlyusuallyreflectsagreatdegreeofindependenceandindividual
Insomecountries,societalandfamilialtreatmentoftheelderlyusuallyreflectsagreatdegreeofindependenceandindividual
Whatdoesthehamburgersayaboutourmodernfoodeconomy?Alot,actually.OverthepastseveralyearsWaldoJaquithintendedt
Aperson’shomeisasmuchareflectionofhispersonalityastheclotheshewears,thefoodheeatsandthefriendswithwhomh
随机试题
下列哪种情况需延期献血
小儿发育最早的系统是
女,38岁。右侧面部发作性电击样疼痛3个月,临床拟诊三叉神经痛。三叉神经功能检查不包括
马齿苋不具有的功效是()。
软件的开发阶段包括()阶段。
全省2006年度农业秋熟超产增收竞赛活动先进单位通报各市县人民政府、省各委办厅局:2006年,为夺取秋熟农业丰收,实现全省秋粮总产超过2005年、棉花单产超历史、农民增收超过计划目标,省政府在全省开展了农业秋熟超产增收竞赛活动。为总结经验,表彰先进,省
决定警察必要性的直接因素是()。
某班级分苹果,如果男生每人分6个,女生每人分8个,则苹果余22个;如果男生每人分8个,女生每人分10个,则苹果少24个,已知男生比女生多3人,则共有苹果()个。
在HTML语言中,为______标记。
查询设计器的“排序依据”选项卡对应于SQL-SELECT语句的______短语。第(11)到(12)题中使用的两个数据表:职称和职工表的结构如下:“职工”表:职工号C(4),姓名C(8),性别C(2),职称号C(4),工资N(7,2)
最新回复
(
0
)