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.
【B19】
选项
A、sleep
B、work
C、food
D、clothes
答案
A
解析
此处句意为“在发现电以前,人们至少在每天的某些时候不得不生活在黑暗 中,所以人们没什么理由去质疑______的原因和需要”。根据上下文,可知A.sleep符合题意, 为正确答案。work“工作”,food“食物”,clothes“衣服”,均不符合题意,故排除。
转载请注明原文地址:https://kaotiyun.com/show/x6IZ777K
0
考研英语一
相关试题推荐
Doctorshavetreatedthefirstreportedcaseof"Internetaddictiondisorder"broughtonbyexcessiveuseofGoogleGlass.I
Ayoungconsultant’slifeistiring.A【C1】______weekstartsbeforedawnonMonday,witharushtotheairportanda【C2】______to
Ayoungconsultant’slifeistiring.A【C1】______weekstartsbeforedawnonMonday,witharushtotheairportanda【C2】______to
Ayoungconsultant’slifeistiring.A【C1】______weekstartsbeforedawnonMonday,witharushtotheairportanda【C2】______to
Whatdoesthehamburgersayaboutourmodemfoodeconomy?Alot,actually.OverthepastseveralyearsWaldoJaquithintendedto
Thefollowingparagraphsaregiveninawrongorder.ForQuestions1-5,youarerequiredtoreorganizetheseparagraphsintoac
Thefollowingparagraphsaregiveninawrongorder.ForQuestions1-5,youarerequiredtoreorganizetheseparagraphsintoac
Manyareawareofthetremendouswasteofenergyinourenvironment,butfailtotakeadvantageofstraightforwardopportunities
Manyareawareofthetremendouswasteofenergyinourenvironment,butfailtotakeadvantageofstraightforwardopportunities
Withincreasingprosperity,WesternEuropeanyouthishavingaflingthatiscreatingdistinctiveconsumerandculturalpatterns
随机试题
按锉纹密度分2号锉刀是指()锉刀。
真实压力比大气压高出的数值通常用下列哪一项表示?()
为确保临床检测过程和结果在偏差和精密度方面达到预定标准的质量工作称为
A.妊娠期腰腹坠痛,阴道少量下血,色淡黯,质稀,头晕耳鸣B.妊娠期阴道少量下血,色淡红,质稀,气短懒言C.妊娠期阴道少量下血,色深红,质稠,口渴饮冷D.妊娠期腰腹坠痛,伴阴道少量下血,色淡,质稀,精神倦怠E.妊娠期阴道少量下血,色淡黯,质稀,腰膝酸
蛋白质变性后的主要表现是
企业发行企业债券必须符合的条件是()。
证券交易当事人买卖的证券,( )。
在涉外税收中,由国家税务局负责征收的有()。
我国在世界各地开办孔子学院,向全世界人民介绍中国文化。这说明教育具有文化()。
下列属于我国国家机构的是
最新回复
(
0
)