当塔机周围输电线路电压为30kv时，塔机的任何部位与输电线路的水平距离不得小于（）。
A.4m
B.3m
C.2m
D.1m
参考答案：C
— Where is my pencil?
— ___________________[ ]
A. It's yellow.
B. It's on the floor.
C. It's so long.
整合营销
