2019年职称英语综合B类教材摘选4

>>职称英语考试：2019年职称英语综合B类教材摘选

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下面是为你整理的教材内容。

Sleep

We all know that the normal human daily cycle 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 win how easily and to what extent this cycle can be modified.

The question is no more 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 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 a reversed 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 , 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.

职称英语综合B类在难度上属于中级水平，报考人数相对来说也是比较多的，所以，想要参加考试的小伙伴如果不知道从何下手开始复习，那就来看看今天的教材分享吧，所选内容都是一些很基础的阅读部分，相信会对你产生很大帮助。想要了解更多资讯点击坦途网职称英语考试频道，我们一直为你更新。