單項選擇題施工升降機(jī)的控制、照明、信號回路的對地絕緣電阻應(yīng)大于(),動力電路的對地絕緣電阻應(yīng)大于()

A.0.5MΩ,1MΩ
B.1MΩ,1MΩ
C.1MΩ,0.5MΩ
D.0.5MΩ,0.5M


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