离心式水泵试运转时，填料完好不过热，滴水速率应以（）滴／分钟为准。
A.0～10
B.0～20
C.10～20
D.5～20
参考答案：C
She was told to wear flat shoes _____ her back problem. [ ]
A. on account of
B. regardless of
C. in terms of
D. in case of
辅材
