A.12 B.36 C.45 D.60
A.焊機(jī)外殼帶電 B.電焊設(shè)備接線(xiàn)柱及焊鉗口 C.電纜絕緣外皮破損 D.可控硅
A.0.5MΩ B.2MΩ C.1MΩ D.1.5MΩ