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
外语
Judging from recent surveys, most experts in sleep behavior agree that there is virtually an epidemic of sleepiness in the natio
Judging from recent surveys, most experts in sleep behavior agree that there is virtually an epidemic of sleepiness in the natio
admin
2013-02-05
20
问题
Judging from recent surveys, most experts in sleep behavior agree that there is virtually an epidemic of sleepiness in the nation. "I can’t think of a【C1】______study that hasn’t found Americans getting less sleep than they ought to," says Dr. David.【C2】______people who think they are sleeping enough would probably be【C3】______off with more rest.
The beginning of our sleep-deficit crisis can be 【C4】______to the invention of the light bulb a century ago. From diary entries and other personal【C5】______from the 18th and 19th centuries, sleep scientists have reached the conclusion that the【C6】______person used to sleep about 9.5 hours a night. "The best sleep habits once were【C7】______on us, when we had nothing to do in the evening down on the farm, and it was dark." By the 1950s and 1960s, that sleep schedule had been reduced【C8】______to between 7.5 and 8 hours, and most people had to wake to an alarm clock. "People cheat on their sleep, and they don’t【C9】______they’re doing it," says Dr. David. "They think they’re okay because they can get【C10】______on 6.5 hours, when they really need 7.5, 8 or even【C11】______to feel ideally vigorous."
Perhaps the most merciless robber of sleep, researchers say, is the【C12】______of the day. Whenever pressures from work, family, friends and community【C13】______. many people consider sleep the least expensive item on the【C14】______. "In our society, you’re considered dynamic【C15】______you say you only need 5.5 hours’ sleep. If you say you’ve got to get 8.5 hours, people think you lack【C16】______and ambition."
To assess the【C17】______of sleep deficit, researchers have put subjects【C18】______a set of psychological and performance tests requiring them, for instance, to add columns of numbers or recall a passage read to them only minutes earlier. "We’ve found that if you’re sleep-deprived, performance【C19】______." says Dr. David. "Short-term memory is impaired,【C20】______are abilities to make decisions and to concentrate."
【C4】
选项
A、followed
B、traced
C、trailed
D、ensued
答案
B
解析
惯用衔接题。be traced to为固定词组,指“追溯到…”,用在此处指现代人初现睡眠不足的危机可以追溯到一个世纪以前电灯发明的时候,符合语义,故答案为[B]traced。
转载请注明原文地址:https://kaotiyun.com/show/lkI7777K
0
大学英语六级
相关试题推荐
WaystoHandleStressThismaycomeasasurprise,butyouneedstressinyourlife.Leadingstressmanagementexpertssayt
A、Hewilltakeacoffeebreak.B、Hewillkeeponworking.C、Hewillgoforawalk.D、Hewillbeginwiththereport.B由男士提到的Iwis
MorethantwomillionpeopleinEuropenowhavefibrebroadbanddirecttotheirhome,suggestsasurvey.Thelatestfigures
Leadershipisthemostsignificantwordintoday’scompetitivebusinessenvironmentbecauseitdirectsthemanagerofabusiness
A、Becausetheyarrivedtheretoolate.B、Becausetheywouldgetsickseeingthetragicscene.C、Becausethescenewastoomisera
Forthispartyyouareallowed30minutestowriteashortessayentitledCollegeEntranceExaminationWithoutEnglish.Youshou
Thepurposeofthisprogramis______(让公众注意到药物滥用问题).
Medicalexpertshave______theincreasingdemandoforgansyearsagoandtheyhavebeendevotedtogettingthesubstitutesfrom
A、Heisanew-comertotheplace.B、Heenjoysnaturalbeauty.C、Hefeelssurprisedatthechange.D、Heiswearingcontactlenses
Therichhavetraditionallypassedtheirwealthontotheirchildren.Butanincreasingnumberofbillionairesarechoosingnot
随机试题
孕40周,初产妇,骨盆外测量:骶耻外径18.5cm,髂棘间径25cm,坐骨结节间径7.5cm,坐骨结节间径与出口后矢状径之和为14cm,胎儿估计3000g,胎头浮,胎心144次/分
一门诊病人,女性,29岁,因左侧腰部钝痛3个月就诊,经B超,KUB+IVP检查发现左侧肾盂有一2.0cm×3.0cm大小结石,左肾积水,左输尿管正常,右肾及输尿管正常,该病人首选的治疗方案为
根据五行学说,金的特性为()。
城镇体系具有所有“系统”的共同特征包括()
某建设工程项目施工采用施工总承包管理模式,其中的二次装饰装修工程由建设单位发包给乙单位。在施工中,乙单位应该直接接受()的工作指令。
对沉板桩过程中出现的异常情况,可采取的有效措施有()。
路基填筑时,当渗水土填在非渗水土上时,非渗水土层顶面应向两侧做成不小于()的排水坡。
______是指没有扣除物价变动的GDP增长率与剔除物价变动的GDP增长率之差。
允许一部分地区、一部分人通过辛勤劳动和合法经营先富起来,是社会主义制度的根本要求。()
很多人在选择车牌号码时会不惜花钱去选取他们认为吉利的数字。
最新回复
(
0
)