單項(xiàng)選擇題當(dāng)發(fā)現(xiàn)接觸網(wǎng)斷線時(shí),非檢修人員距已斷導(dǎo)線不應(yīng)少于()。(C、4、Y)[05-00-05-03][030104]

A.5m
B.10m
C.15m
D.20m


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