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| 作者：不明 来源：www.pccode.net 整理 发布时间：2007-1-25 16:40:15 发布人：wongrs | |
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the day to working at night is a(28)____ of growing importance in industry where automation(29)____ round-the-clock working of machines. It normally(30)____ from five days to one week for a person to adapt to a(31)____ routine of sleep and wakefulness, sleeping during the day and working at night. (32)____, it is often the case in industry that shifts are changed every week. This means that no sooner has he got used to one routine(33)____ he has to change to another, (34)____ much of his time is spent neither working nor sleeping very(35) ____. One answer would seem to be(36)____ periods on each shift, a month, or even three months. (37)____, recent research has shown that people on such systems will revert to go back to their(38)____ habits of sleep and wakefulness during the week-end and that this is quite enough to destroy any(39)____ to night work built up during the week. The only real solution appears to be to hand over the night shift to those permanent night workers whose(40)____ may persist through all week-ends and holidays. 26.A.in B.with C.of D.over 27.A.cycle B.period C.circle D.round 28.A.problem B.difficulty C.trouble D.matter 29.A.asks B.invites C.calls for D.reacts to 30.A.takes B.spends C.deman
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