利尿剂属于表现增强性药物。（ ）

A． B． C． D．

单项选择题

A．
B．
C．
D．

压力控制阀主要利用作用于阀芯上的液压力和[填空]相平衡的原理进行工作。

问答题压力控制阀主要利用作用于阀芯上的液压力和[填空]相平衡的原理进行工作。

Why did Xiaoli want to make an invitation card? A、She w...

单项选择题Why did Xiaoli want to make an invitation card?
A、She wanted to invite Sally to the New Year’s party.
B、She was going to get married.
C、She wanted to invite Sally to her birthday party.
D、She was going to go abroad.