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【单选题】第二篇 Sleep 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 n...
A.
people hate the inconvenience of working on night shifts.
B.
your life is disturbed by changing from day to night routines and back.
C.
not all industries work at the same hours.
D.
it is difficult to find a corps of good night workers.
【单选题】二十一世纪健康概念有哪几方面（）
A.
身体健康、心理健康、人际关系健康
B.
饮食健康、身体健康、心理健康
C.
身体健康、心理健康、社会适应良好
D.
身体健康、心理健康、医疗健康