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
We all know that the normal human daily cycle of activity is of some 7-8 hours’ sleep alternating with some 16-17 hours’ wakefu
We all know that the normal human daily cycle of activity is of some 7-8 hours’ sleep alternating with some 16-17 hours’ wakefu
admin
2013-11-29
44
问题
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 s peaking, the sleep normally coincides with the hours of darkness. Our present concern is with how easily and to what extent this cycle can he modified.
The question is no mere academic one. The ease, for example, with which people can change from working in the day to winking at night is a question of growing importance in industry where automation calls 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 end wakefulness, sleeping during the day end working at night. Unfortunately, it is often the case in industry that shifts 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 bas 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.
The only real solution appears to be to hand over the night shift to a number of permanent night workers. An interesting study of the domestic life and health of night-shift workers was carried out by Brown in 1957. She found a high incidence of disturbed sleep and other disorders among those on alternating day and night shifts, but no abnormal occurrence of these phenomena among those on permanent night work.
This latter system then appears to be the best long-term policy, but meanwhile something may be done to relieve the strains of alternate day and night work by selecting those people who can adapt most quickly to the changes of routine. One way of’ knowing when a person has adapted is by measuring his body temperature. People engaged in normal daytime work will have a high temperature during the hours of wakefulness and a low one at night; when they change to night work the pattern will only gradually go back to match the new routine and the speed with which it does so parallels, broadly speaking, the adaptation of the body as a whole, particularly in terms of performance. There from, by taking body temperature at intervals of two hours throughout the period of wakefulness it can be seen how quickly a person can adapt to a reversed routine, and this could be used as a basis for selection. So far, however, such a form of selection does not seem to have been applied in practice.
It is possible to find out if a person has adapted to the changes of routine by measuring his body temperature because______.
选项
A、body temperature changes when the cycle of sleep and wakefulness alternates
B、body temperature changes when he changes to night shift or back
C、the temperature reverses when the routine is changed
D、people have higher temperatures when they are working efficiently
答案
A
解析
最后一段提到people engaged in normal daytime work will have a high temperature during the hours of wakefulness and a low one at night,因此根据体温测量可以判断人们是否适应了新的工作规律。
转载请注明原文地址:https://kaotiyun.com/show/Z2hO777K
0
考博英语
相关试题推荐
Modemtechnologyandsciencehaveproducedawealthofnewmaterialsandnewwaysofusingoldmaterials.Fortheartistthisme
Don’tcallhimjustacollegeprofessor.Internetentrepreneur,TVpersonality,advisertopresidents,andfriendtotherichan
MywritinginmylateteensandearlyadulthoodwasfashionedaftertheU.S.shortstoriesandpoetrytaughtinthehighschools
Atthefall2001SocialScienceHistoryAssociationconventioninChicago,theCrimeandJusticenetworksponsoredaforumonth
BeforehighschoolteacherKimberlyRughgotdowntobusinessatthestartofarecentschoolweek,shejokedwithherstudents
Millionsofindividualsallaroundtheworldareinovertheirheadsindebt.Debtcanturnanindividualortheirfamily’slife
Fasterthaneverbefore,thehumanworldisbecominganurbanworld.Bythemillionstheycome,theambitiousandthedown-trodd
Fasterthaneverbefore,thehumanworldisbecominganurbanworld.Bythemillionstheycome,theambitiousandthedown-trodd
Fasterthaneverbefore,thehumanworldisbecominganurbanworld.Bythemillionstheycome,theambitiousandthedown-trodd
Asoneworkswithcolorinapracticalorexperimentalway,oneisimpressedbytwoapparentlyunrelatedfacts.Colorasseenis
随机试题
甲建筑公司收到了某水泥厂寄发的价目表但无其他内容。甲按标明价格提出订购1000吨某型号水泥,并附上主要合同条款,却被告知因原材料价格上涨,原来的价格不再适用,要采用提价后的新价格,则下列说法正确的有()。
下列民事权利的客体中,可以许可他人使用的是()。
中断供电将造成重大设备损坏,重大产品报废,国民经济中重点企业的连续生产过程被打乱需要长时间才能恢复的负荷,应为()。
如在开挖临时边坡以后砌筑重力式挡土墙,合理的墙背形式是( )。
控制活动构成托管人内部控制的基础。( )
在对K公司2005年度会计报表进行审计时,A注册会计师负责生产循环的审计。在审计过程中遇到以下问题,请代为做出正确的专业判断。在对被审计单位的存货实施监盘程序时,注册会计师应当( )。
原始社会许多的______已被考古工作者发现并存放在博物馆内加以精心保护,以便今后研究。填入横线处的词语最恰当的一项是()。
山脉构成我国地形的骨架,山脉延伸的方向称作走向。下列选项中不属于南北走向山脉的是()。
老师想从52个学生中抽取10名学生的成绩单分析期中考试情况,一个学生在旁边随手拿走两份成绩单,老师没在意,在余下的成绩单中抽了10名学生的,则李明的成绩单被学生拿走和被老师抽到的概率分别为:
毛泽东说,中国“东方不亮西方亮,黑了南方有北方”。这意味着()。
最新回复
(
0
)