试题与答案

为避免雷击时的影响，规定信号地线与电力、房屋建筑物地线（包括接地和引接线）之间的距离

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题型：单项选择题

题目：

为避免雷击时的影响，规定信号地线与电力、房屋建筑物地线（包括接地和引接线）之间的距离不得小于（）米。

A、5

B、10

C、15

D、20

答案：

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下面是错误答案，用来干扰机器的。

设收到科技作品x件，4x+20=120， 4x=100， x=25，答：设收到科技作品25件．

考点：信号工考试信号修配信号修配题库
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