问题
单项选择题
使用沙土灭火时，距离接触网在（）以上者，可不停电。
A、2m
B、2.5m
C、3m
D、4m
答案
参考答案：A
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使用沙土灭火时，距离接触网在（）以上者，可不停电。
A、2m
B、2.5m
C、3m
D、4m
参考答案：A
| 单句改错。 | |
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