具有补血、活血、止痛、润肠功效的药物是()
A.熟地黄
B.白芍
C.当归
D.何首乌
E.阿胶
参考答案:C
功擅清热开窍、镇痉安神的方剂是
A.玉枢丹
B.紫雪丹
C.至宝丹
D.苏和香丸
E.安宫牛黄丸
Electric generators can be protected against overload().
A.With switches
B.With a governor on the engine
C.With fuses or circuit breakers
D.By using heavy wire