急性阑尾炎的主要病因是 A．急性腹膜炎扩散 B．机体抵抗力下降 C．全身感染 D．阑

—— Have you considered _____ your job as a teacher?

——Yes. I like the job because a teacher is often considered _____ a gardener.

A．to change; to be

B．to change; being

C．changing; being

D．changing; to be

位置公差是位置误差的最小允许值，包括平行度、垂直度、倾斜度、同轴度、对称度、位置度、圆跳动、全跳动8种。

小青龙汤的君药为（）

A.桂枝

B.细辛

C.干姜

D.半夏

E.芍药

什么是受电点？