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
2014-07-20
42
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 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 mere academic one. The ease, 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 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 shifts are changed every week: a person may work from 12 midnight to 8 a. m. one week, 8a.m. to 4 p. m. the next, and 4p.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.
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 day-time 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 adjust gradually 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. Therefore, 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.
Which of the following statements is NOT true?
选项
A、Body temperature may serve as an indication of a worker’s performance.
B、The selection of a number of permanent night shift workers has proved to be the best solution.
C、Taking body temperature at regular intervals can show how a person adapts to the changes of routine.
D、Disturbed sleep occurs less frequently among those on permanent night or day shifts.
答案
B
解析
根据末段第三、四句可排除[A];而由末段倒数第二句可排除[C];此外,根据第三段末句可排除[D]。第三段首句和末段首句中都出现了appears to be(看起来,似乎),由此可知文中提到挑选很多长期上夜班的工人是最好的解决方法时,并不是完全肯定的,故答案为[B]。
转载请注明原文地址:https://kaotiyun.com/show/K3TK777K
0
专业英语四级
相关试题推荐
Americawillneveragainhaveasanationthespiritofadventureasit______beforetheWestwassettled.
Accordingtotheconversation,RuthcallsTimbecause
Iheardaknockatthedoor.Ipeeredthroughthepeephole,andtherewasmyfather.AsIopenedthedoor,Dadbegantalkingalt
WhathappenedattheUnitedNations?Howdidthecriticslikethenewplay?(1)_____aneventtakesplace,newspapersa
Althoughmostpeoplereturnfrompackageholidaysreasonablysatisfied,thisisnotalwaysthe(1)_____.Take,forinstance,the
Thearrivalofthemass-producedcar,justoveracenturyago,causeda(n)(1)_____ofbusinesscreation.Firstcamethemakerso
You______Markanything.Itwasnoneofhisbusiness.[1998]
StrikesanddemonstrationsinGermany,BritainandFrancehelpedtomaketheshorterworkingweekaunionpriority.Employersga
You______himsoseverely.Itwasnoneofhisbusiness.
High-qualitycustomerserviceispreachedbymany,butactuallykeepingcustomershappyiseasiersaidthandone.Shopperss
随机试题
举世皆浊我独清,众人皆醉我独醒,是以见放。《渔父》见:
电子束焊时,由于电子束斑点极小、功率密度大、穿透能力强、焊缝的宽深比达60:1,可一次焊透0.1~300mm厚的不锈钢。()
整票货物已经全部装进货舱或装在甲板(如集装箱)后,船长或承运人或其授权的代理人凭大副收据所签发的提单是()
A.肺吸虫病 B.过敏性支气管炎 C.肺结核 D.支气管炎 E.急性喉炎痰液涂片检查鳞状上皮细胞增多见于
口服铁剂治疗营养性缺铁性贫血时,哪项不妥
某托运人的50件货物因承运人不能免责的事由在一次事故中灭失,共损失25万特别提款权,该事故没有造成其他人身伤亡和财产损害。假设每件货物重2000公斤,运输船舶的总吨位为300吨。则按我国海商法关于承运人单位赔偿责任限额的规定,承运人最后实际应该赔偿(
房地产支出与收入比等于()。
婴儿动作发展的规律是什么?
下面叙述中正确的是______。
将考生文件夹下UEM文件夹中的文件MACRO.NEW设置成隐藏和只读属性。
最新回复
(
0
)