DC600V干线绝缘检测屏设定值:R1、R2为( )Ω,R3为( )Ω;

DC600V干线绝缘检测屏设定值:R1、R2为( )Ω,R3为( )Ω;

A.750600

B.600800

C.650750

D.600750

正确答案是D