单选题6.18

用接地电阻测试仪测量接地电阻时，电流极探杆应位于被测体（）米处。

发布于 2021-02-22 21:09:20

【单选题】
A 5$
B $ 20$
C $ 40$
D 50

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MEISHAONV 2023-02-22

这家伙很懒，什么也没写！

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