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[主观题]
筏板基础砼浇筑完成后养护时间不少于(),当砼强度达到设计强度的时,应进行基坑回填。
A、7d,30%
B、8d,30%
C、7D,40%
D、8d,40%
查看答案
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A、7d,30%
B、8d,30%
C、7D,40%
D、8d,40%
A.20%.
B.30%.
C.40%.
D.50%.
A. 60%
B. 70%
C. 75%
D. 80%
A.40%.
B.50%.
C.30%.
D.70%.
A.7
B.14
C.21
D.28
A.5o%
B.75%
C.90%
D.100%