当前位置：在线题库搜索＞[单选题]第二类防雷建筑物每根防雷引下线的冲击接地电阻不应大于（）欧姆。的答案是什么？
问题：
[单选题]第二类防雷建筑物每根防雷引下线的冲击接地电阻不应大于（）欧姆。
A、10；
B、20；
C、30；
D、40；
参考答案：
A
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