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
Sleep We all know that the normal human daily cycle of activity is of some 7-8 hours’ sleep alternating with some 16-17 hour
Sleep We all know that the normal human daily cycle of activity is of some 7-8 hours’ sleep alternating with some 16-17 hour
admin
2013-09-24
32
问题
Sleep
We all know that the normal human daily cycle of activity is of some 7-8 hours’ sleep alternating with some 16-17 hours’ wakefulness and that, broadly speaking, the sleep normally coincides with the hours of darkness. Our present concern is with how easily and to what extent this cycle can be modified.
The question is no more academic one. The case, for example, with which people can change from working in the day to working at night is a question of growing importance in industry where automation calls insistently for round the clock working of machines. It normally takes from five days to one week for a person to adapt to a reversed routine of sleep and wakefulness, sleeping during the day and working at night. Unfortunately it is often the case in industry that shift’s are changed every week; a person may work from 12 midnight to 8 a. m. one week , 8 a. m. to 4 p. m. the next, and 4 p. m. to 12 midnight the third and so on. This means that no sooner has he got used to one routine than he has to change to another, so that much of his time is spent neither working nor sleeping very efficiently.
One answer would seem to be longer periods on each shift, a month, or even three months. Recent research by Bonjer of the Netherlands, however, has shows that people on such systems will revert to their normal habits of sleep and wakefulness during the weekend and that this is quite enough to destroy any adaptation to night work built up during the week.
The only real solution appears to be to hand over the night shift to a corps of permanent night workers whose nocturnal wakefulness may persist through all weekend and holidays. An interesting study of the domestic life and health of night shift workers was carried out by Brown. She found a high incidence of disturbed sleep, digestive disorder and domestic disruption among those on alternating day and night shifts, but no abnormal occurrence of these symptoms among those on permanent night work.
In the second paragraph, "the third"means
选项
A、the third week.
B、the third shift.
C、a third of the time.
D、the third routine.
答案
A
解析
通过通读第二段可知,third指的是the third week,序数词后面的名词有时可以省略。所以选择A项。
转载请注明原文地址:https://kaotiyun.com/show/RoFd777K
本试题收录于:
职称英语综合类C级题库职称英语分类
0
职称英语综合类C级
职称英语
相关试题推荐
ThetiesymbolizesalloftilefollowingexceptWhendidBritishgentlemenbegintoweartiesregularly?
Accordingtothepassage,whichofthefollowingisthemostpollutingenergyresource?China’sThreeGorgesDam
AFord’sFollowersBTheAssemblyLineCFord’sGreatDreamDTheEstablishmentoftheCompanyEFord’sBiggestContributio
AFord’sFollowersBTheAssemblyLineCFord’sGreatDreamDTheEstablishmentoftheCompanyEFord’sBiggestContributio
SleepSleepispartofaperson’sdailyactivitycycle.Thereareseveraldifferentstagesofsleep,andtheytoooccurinc
SleepSleepispartofaperson’sdailyactivitycycle.Thereareseveraldifferentstagesofsleep,andtheytoooccurinc
Scientistsfoundthatthebraincellsofalearningdisabledpersondifferfromthoseofanormalpersonin______.Whichofth
Theindexisthegovernment’schiefgauaeoffutureeconomicactivity.
随机试题
某事业单位职员倪某正确贯彻执行党和国家的路线、方针、政策,自觉遵守国家的法律、法规和各项规章制度,廉洁自律,熟悉业务,工作积极,能够完成工作任务。对其应认定为哪一等次的考核结果?()
常用的制馅干菜类的原料有木耳、_______、黄花菜等。
引起不随意注意的原因是什么?
斜角肌间隙位于何处?有哪些结构通过?
房间隔缺损的血流动力学改变常引起
茎木类中药有异型维管束结构的药材是
下列各项中,不应计提固定资产折旧的是()。
文章的标题叫“我的家在哪里”,从文中看,真正能算是“我的家”的一项是:对文章结尾段画线句子理解分析不正确的一项是:
曲线
设向量α=(a1,a2,…,an)T,β=(b1,b2,…,bn)T都是非零向量,且满足条件αTβ=0.记n阶矩阵A=αβT,求:(1)A2;(2)矩阵A的特征值和特征向量.
最新回复
(
0
)