单选题:土方工程施工的基坑一般采用“开槽支撑、(  )、严禁超挖”的开挖原则。

题目内容:
土方工程施工的基坑一般采用“开槽支撑、(  )、严禁超挖”的开挖原则。 A.先撑后挖、分层开挖
B.先挖后撑、分层开挖
C.先撑后挖、整体开挖
D.先挖后撑、整体开挖

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答案解析:

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