--Peter! Hurry up! You ___ on the phone. ---Oh, I ___ .Thank you.

A．are being wanted, come

B．want , come

C．will want; should come

D．are wanted, am coming

三段式电流保护有哪几种保护组成（）

A、无时限电流速断保护

B、限时电流速断保护

C、定时限过电流保护

D、复合压过流保护