对（）电缆可以直接通过绝缘电阻测量来判断电缆的好坏。
A、高压；
B、中压；
C、低压；
D、中、低压。
参考答案：C
The two girls, born four days _______ in January 1986, have been friends since their junior days and both won the championship this year.
A．off
B．away
C．ahead
D．apart
