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题目
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.
Why is the question of "how easily people can get used to working at night？" not a mere academic question？
A．Because few people like to reverse the cycle of sleep aud wakefulness.
B．Because sleep normally coincides with the hours of darkness.
C．Because people are required to work at night in some fields of industry.
D．Because shift work in industry requires people to change their sleeping habits.
更多“We all know that the normal human daily cycle of activity is of some 7-8 hours' sleep alte”相关的问题
第1题
第2题
A．testifies to
B．caters to
C．coincides with
D．reckons with
第3题
A．rotating
B．alternating
C．varying
D．following
第4题
A．conform
B．coincide
C．collide
D．comply
第5题
The question is not mere 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 reversed routine of sleep and wakefulness, sleeping during the day and working at night. Unfortunately, it is often the ease in industry tint 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 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 shown 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 weekends 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 discord and domestic disruption among those on alternating day and night shifts, but no abnormal occurrence of these symptoms among those on permanent night work.
The article is mainly about ______.
A．how the normal human daily cycle works
B．how to deal with the problem of shift work
C．a research on the normal human daily cycle
D．how to work better
第6题
A．Right
B．Wrong
C．Not mentioned
第7题
From the passage we know that joints and muscles perform. best when______.
A．they are twisted and stretched
B．they are in their normal position
C．they are tested with a human" guinea pig"
D．they are tested with electronic instruments
第8题
What do we know about terrorism？
A．It is always overshadowed by human goodness.
B．It shocks us again with its evilness.
C．It was somehow predicted.
D．It happens all the time.
第9题
What should we know while claiming scientific knowledge of "human nature"？
A．The variations in the human physique.
B．The similarities in human physique.
C．How people from different cultures solve their problems.
D．What all human beings have in common.
第10题
What should we know while claiming scientific knowledge of "human nature"？
A．The variations in the human physique.
B．The similarities in human physique.
C．How people from different cultures solve their problems.
D．What all human beings have in common.
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