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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】下列不属于第二级客流控制的是（）。
A.
关闭部分进站闸机，停用部分售票设备。
B.
在进站闸机口设置铁马等备品限制乘客进站或分批放行乘客进站。
C.
通过控制安检速度控制乘客进站速度或分批进行乘客安检。
D.
通过停用扶梯及引导乘客走楼梯等方式减缓乘客走行速度。