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
45
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.
Therehasbeennochange,______Icantell.
Manytheoriesconcerningthecausesofjuveniledelinquency(crimescommittedbyyoungpeople)focuseitherontheindividualor
"Walkinginthestreet,Isawhim."hasallthefollowingpossiblemeaningsEXCEPT______.
WhathappenedattheUnitedNations?Howdidthecriticslikethenewplay?(1)_____aneventtakesplace,newspapersa
WhathappenedattheUnitedNations?Howdidthecriticslikethenewplay?(1)_____aneventtakesplace,newspapersa
Thearrivalofthemass-producedcar,justoveracenturyago,causeda(n)(1)_____ofbusinesscreation.Firstcamethemakerso
Vitamins,andmineralssuchasiron,calcium,areanothergroupofessentialnutrients,thoughthebodydoesnotneed______it
ItisabsolutelyessentialthatWilliam_____hisstudyinspiteofsomelearningdifficulties.
Sometimesthestudentmaybeaskedtowriteabouthis______toacertainbookorarticlethathassomebearingonthesubjectb
随机试题
下列选项中,属于绩效薪金制的主要优点的是()。
吴组缃抗战期间创作的长篇小说是()
阅读朱光潜《文学的趣味》中的几段文字,然后回答问题。文学作品在艺术价值上有高低的分别,鉴别出这高低而特有所好,特有所恶,这就是普通所谓趣味。辨别一种作品的趣味就是评判,玩索一种作品的趣味就是欣赏,把自己在人生自然或艺术中所领略得的趣味表现出就是创
A.ρ因子B.因子C.TFⅡDD.AATAAA序列参与真核生物转录终止的是
下列可作为豚鼠的采血方法的是
黄酮类判断有无3-OH取代,可用黄酮类判断有无邻二酚羟基取代,可用
课程目的为个体发展和幸福服务,课程内容提倡广泛,课程实施尊重儿童,讲究方法,这是()课程观的观点。
歌唱家:歌唱:歌曲
TheGermanairforcebombedGuemieatototaldestructionbecause______.AfterthebombingofGnemica,theGermans______.
Buriedbeneathasanddune,inthebeachtownofBeidaihe,【C1】______oneofChina’snewestartgalleries.AnoffshootoftheUl
最新回复
(
0
)