11[单选题] 混凝土大坝的砼设计龄期一般为（） A.7d B.28d C.90d - 查题网

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河南成教 / 水工程经济

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11[单选题]
混凝土大坝的砼设计龄期一般为（）

A.7d

B.28d

C.90d

D.30d

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水工程经济

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