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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】各组分密度差别较大时制备散剂应该（）
A.
密度大的先加，密度小的后加
B.
密度小的先加，密度大的后加
C.
配制10000倍散剂
D.
配制100倍散或1000倍散
E.
配制10倍散剂