沟槽开挖规定，槽底原状地基土不得扰动，机械开挖时槽底预留()土层由人工开挖至设计高程，整平。A:100～200mmB:50～100mmC:200～...

作者: rantiku 人气: - 评论: 0

问题沟槽开挖规定，槽底原状地基土不得扰动，机械开挖时槽底预留()土层由人工开挖至设计高程，整平。

选项 A:100～200mm B:50～100mm C:200～300mm D:100～150mm

答案 C

解析

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