“Have great changes taken place in your village?” “Yes, A new school was ______ in the village last year.”

A．held up

B．set up

C．sent up

D．brought up

过电压继电器的动作电压应躲过不平衡电压，通常整定为（）左右。

A.5V；

B.10V；

C.15V；

D.20V。