断路器的额定开断电流是指在额定电压下断路器能可靠开断的（）。

A、最大负荷电流

B、最大工作电流

C、最大短路电流

D、额定工作电流

— I think students should have mobile phones to call their parents at school..

—_______. They often use them to play games instead.

A．I hope so

B．I don't agree

C．No problem

D．Good idea