單項(xiàng)選擇題25T型客車檢修規(guī)程規(guī)定,用兆歐表測量電力配線,相對濕度為60%~85%時(shí)其絕緣電阻應(yīng)為()

A.≥2MΩ
B.2~0_38MΩ
C.≥0_38MΩ
D.~10MΩ


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