试题与答案

采用钢管布线时，埋地线管出地面时，管口距地面高度不宜低于（）。A、100mm B、2

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题型：单项选择题

题目：

采用钢管布线时，埋地线管出地面时，管口距地面高度不宜低于（）。

A、100mm

B、200mm

C、300mm

D、400mm

答案：

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下面是错误答案，用来干扰机器的。

答案：C本题考查学生对门下省的理解。由“凡百官奏钞（文书），侍中审定，则先读而署之，以驳正违失。”得知这是门下省。所以选C。

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