The senior senator has in the past three terms both experienced the sweet taste of success and the bitterness of defeat in his legislation fights with his opponents.

A．both experiences

B．experiences both

C．experience both

D．experienced both

下述与肾脏的排泄功能无关的是( )。

A．分泌促红细胞生成素

B．维持机体水和渗透压平衡

C．维持机体酸碱平衡

D．维持机体电解质平衡

E．以上都不是