非开阔地区50m以下档距,导地线平均运行应力小于拉断应力的(),可不加装防振措施。A.18%;B.20%;C.23%;D.25%。

作者: rantiku 人气: - 评论: 0
问题 非开阔地区50m以下档距,导地线平均运行应力小于拉断应力的(),可不加装防振措施。
选项 A.18%; B.20%; C.23%; D.25%。
答案 A
解析

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