Some of the _______suspects refused to answer and kept their mouths shut.

A．questioning

B．being questioned

C．questioned

D．to be questioned

受电容量为160kV·A及以上的高压供电的工业户，其调整电费的功率因数标准值应是（）。

A.0.90

B.0.85

C.0.80

D.0.95