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0、4mm线径铜导线(在20℃),其直流环路电阻(环阻)最大值为 ( )Ω/km。
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发布时间: 2023-11-19 12:44
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0、4mm线径铜导线(在20℃),其直流环路电阻(环阻)最大值为 ( )Ω/km。
A.A、190
B.B、236
C.C、296
D.D、325
正确答案是C
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