答案：C
"How far is the station?" "It's only _____ drive." [ ]
A. two hours
B. two hours'
C. two hour
D. two hour's
电压互感器按用途分为测量用电压互感器和（）。
A.充电用电压互感器
B.绝缘用电压互感器
C.保护用电压互感器
