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
18
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.
The main problem of the round-the-clock working system lies in______.
选项
A、the inconveniences brought about to the workers by the introduction of automation
B、the disturbance of the daily life cycle of workers who have to change shifts too frequently
C、the fact that people working at night are often less effective
D、the fact that it is difficult to find a number of good night workers
答案
B
解析
文中第二段指出工人们适应新的工作时间通常要5至7天,但shifts are changed every week,这就导致了workers spent neither working nor sleeping very efficiently,选项 B符合。
转载请注明原文地址:https://kaotiyun.com/show/d2hO777K
0
考博英语
相关试题推荐
TobroadentheirvotingappealinthePresidentialelectionof1796,theFederalistsselectedThomasPinckney,aleadingSouthC
Today,Americancollegesanduniversitiesareunderstrongattackfrommanyquarters.Teachers,itischarged,arenotdoingag
Modemtechnologyandsciencehaveproducedawealthofnewmaterialsandnewwaysofusingoldmaterials.Fortheartistthisme
DealingwithDepression(51)Contrarytowhatmanypeoplethinkdepressionisnotanormalpartofgrowingolder.Norisith
Thewaypeopleholdtothebeliefthatafun-filled,painfreelifeequalshappinessactuallyreducestheirchancesofeverattai
Theschoolauthorityagainststudents’smokingbothintheclassroomsandathome.
Cultureisactivityofthought,andreceptivenesstobeautyandhumanefeeling,【1】ofinformationhavenothingtodowithit.Am
Cultureisactivityofthought,andreceptivenesstobeautyandhumanefeeling,【1】ofinformationhavenothingtodowithit.Am
Sincetheearlyeightieswehavebeenonlytooawareofthedevastatingeffectsoflargescaleenvironmentalpollution.Suchpoll
Fasterthaneverbefore,thehumanworldisbecominganurbanworld.Bythemillionstheycome,theambitiousandthedown-trodd
随机试题
下列选项中,不属于发票类型的是()。
资本主义工资的基本形式包括()
导致遗传性果糖不耐受症的缺陷酶是
乌梅丸加减运用中大便不通者加
原发性下肢深静脉瓣膜功能不全的超声表现,以下哪一项是错误的
系统性红斑狼疮的诊断标准不包括
A、急性肾小球肾炎B、急进性肾小球肾炎C、IgA肾病D、尿路感染E、尿路结石男性,32岁,上呼吸道感染、发热36小时后出现肉眼血尿,尿常规蛋白阴性、尿红细胞满视野,血肌酐76μmot/L
在抵押合同中()贷款得不到清偿时,抵押物的所有权归贷款人所有。
张教授:智人是一种早期人种,最近在百万年前的智人遗址发现了烧焦的羚羊骨头的碎片化石。这说明人类在自己进化的早期就已经知道用火来烧肉了。李研究员:但是在同样的地方也同时发现了被烧焦的智人骨头碎片的化石。以下哪项最可能是李研究员所要说明的?
使用VisualBasic6.0开发的应用程序,最多可以有______个窗体。
最新回复
(
0
)