---I’m sorry, I ______ at you the other day.

----Forget it. I was out of control at that time, too.

A．shouldn’t shout

B．mustn’t have shouted

C．shouldn’t have shouted

D．mustn’t shout

一个电容器的规格是“10μF  50V”，则（   ）

A．这个电容器的电容为10^-5F

B．这个电容器加上50V电压时，电容才是10μF

C．这个电容器没有电压时，电容为0

D．这个电容器加的电压不能低于50V