欲配制1T的N—P2O5—K2O含量为8—10—4的混合肥料，需用氯化钾（含K2O60%）（）kg
A. 400
B. 500
C. 66.7
D. 33.3
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从众是指人们对于某种行为要求的依据或必要性缺乏()，跟随他人行动的现象。
A twin-screw vessel can clear the inboard propeller and maneuver off a pier best by holding a(n)（）.
A. forward spring line and going slow ahead on the inboard engine
B. after spring line and going slow astern on the outboard engine
C. forward spring line and going slow ahead on both engines
D. forward spring line and going slow ahead on the outboard engine
清扫器与输送带的距离不大于（）mm，并有足够的压力，接触长度应在85%以上。
A. 2～3
B. 2～4
C. 3～4
普冷板还可以用作硬币的制造。
A. 正确
B. 错误
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