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在防治渗透变形措施中,哪些是在控制水力坡降?()

A、上游做垂直防渗推幕或设水平铺盖,

B、下游挖减压沟,

C、退出部位铺设反滤层。

时间：2021-07-17 23:23 关键词：道路桥梁工程技术高起专土质与土力学 19级补考 2020年第二学期补考

答案解析

D

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