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
46
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.
【B2】
选项
A、the
B、what
C、because
D、many
答案
B
解析
句子的谓语是is,空格处缺的必然是一个连词或关系词。B.what是关系代词, 在从句中作表语,符合题意。what引导的这个表语从句比较复杂:who study sleep是定语从 句,修饰scientists;定语从句who live for several weeks…day or night修饰先行词human subjects。故B.what为正确答案。because是连词,表示原因。其他两项明显不符合题意,故 排除。
转载请注明原文地址:https://kaotiyun.com/show/g6IZ777K
0
考研英语一
相关试题推荐
Doctorshavetreatedthefirstreportedcaseof"Internetaddictiondisorder"broughtonbyexcessiveuseofGoogleGlass.I
"MoneyMattersonCampus"isarecentlyreleasedstudyonfinancialliteracyamongyoungadults.Itsupportsprovidingstudents
"MoneyMattersonCampus"isarecentlyreleasedstudyonfinancialliteracyamongyoungadults.Itsupportsprovidingstudents
Ayoungconsultant’slifeistiring.A【C1】______weekstartsbeforedawnonMonday,witharushtotheairportanda【C2】______to
"AMZN"isafour-letterwordtomanybooksellers.Theonlineretailerhasbeen【C1】______ofkillingthebooksellingindustry.It
"AMZN"isafour-letterwordtomanybooksellers.Theonlineretailerhasbeen【C1】______ofkillingthebooksellingindustry.It
"Theloveofmoney",StPaulmemorablywrotetohisprotegeTimothy,"istherootofallevil."【F1】"All"maybeputtingitabit
Inhis"Odyssey",Homerimmortalizedtheideaofresistingtemptationbyhavingtheprotagonisttiedtothemastofhisship,to
ArecentBBCdocumentary,"TheTownThatNeverRetired",soughttoshowtheeffectsof【C1】______thestatepensionagebyputting
随机试题
某井欲进行化学堵水,已知油层有效孔隙度为25%,堵剂用量为28.23m3,封堵半径为3m,求化堵层厚度。(打井时钻头直径0.2m。)
鑫鑫服饰在市场调研中发现,西北地区的几个少数民族盛行带狼图腾的服饰.于是针对这个特点,设计出各种款式的服饰,在西北地区大获成功。该公司采用的竞争战略是【】
下列有关副癌综合征的叙述中哪项正确
中医祛邪法适用的病症有
能够引起排卵后基础体温升高的是
下列诊断哪项可排除其处理应首先考虑下列何项
旋光度测定中,( )。
变直径管,直径由100mm扩大到200mm,直径变大后的流速为1.5m/s,直径变化前的流速为()m/s。
为扩大可耕地面积,增加粮食产量,黄河三角洲等盐碱地的开发利用备受关注。我国科学家应用耐盐基因培育出了耐盐水稻新品系。(1)获得耐盐基因后,构建重组DNA分子所用的限制性内切酶作用于图中的______处,DNA连接酶作用于______处。(填“a”或“b
(2015·广西)以形成受教育者一定思想品德为目的,教育者与受教育者共同参与的教育活动是()
最新回复
(
0
)