中性点直接接地或经过低阻抗接地系统，称为（）接地系统。
A.大电流
B.小电流
C.中性点
D.中性点不
参考答案：A
情景交际。
1. 当你想问别人怎么了应说：[ ]
A. What is it?
B. What's the matter?
C. Are you right?
2. 当你想说我找不到我的书了，应说：[ ]
A. I can find my book.
B. I can't find my book.
C. Where is my book?
新架挂光（电）缆与杆上原光（电）缆设施的间距为（）。
A.300mm
B.400mm
C.500mm
D.600mm
