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刷刷题刷刷变学霸
举一反三
【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.
【多选题】以下关于京杭大运河的表述中，错误的有（）。
A.
京杭大运河自唐代开始建造
B.
京杭大运河全程分为通惠河、鲁运河、中运河、里运河、江南运河五段
C.
京杭大运河呈南北走向，全长1747公里
D.
京杭大运河沟通了海河、黄河、淮河、长江、钱塘江五大河流