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. 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.
1. The best solution for implementing the 24-hour working system seems
A. to change shifts at longer intervals
B. to have longer shifts
C. to employ people who work on night shifts only
D. to create better living conditions for night workers
本题考核读者对文章具体内容的理解。这需要联系和概括第三段的第一句和第四段第一句的意思。第三段第一句说,要真正解决这个问题似乎只有把夜班活固定地交给一批长夜班的工人去干。第四段第一句又说,这种专人干长久的夜班的方法看来不失为最佳的长远之计。所以选项C是正确答案。
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