患者，男，40岁，腰酸腿软，遗精，小便频数清长，遗尿，舌润苔薄，脉沉细，宜选用（）。
A.桑螵蛸
B.五味子
C.五倍子
D.乌梅
E.芡实
参考答案：A
Generally speaking, ____according to the directions, the drug has no side effect.
A．when taking
B．when taken
C．when to take
D．when to be taken.
3，-1，5，1，( )
A．3
B．7
C．25
D．64
