强的松治疗类风湿性关节炎,一般每日剂量不超过()
A.10mg
B.20mg
C.30mg
D.40mg
E.60mg
参考答案:D
已知扇形的圆心角为120°,半径为15cm,则扇形的弧长为______cm(结果保留π).
If I ruled the world, I would________the world________everything that is bad.[ ]
A. get rid of; by
B. be rid of; by
C. rid; of
D. get rid; of