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【单选题】
已知 C20混凝土的实验室配合比为:1:2.5:5,水灰比为0.6,经测定砂的含水率为3%,石子的含水率为1%。试确定混凝土施工配合比A.
1:2.525:5.15
B.
1:5.525:5.05
C.
1:5.575:5.05
D.
1:5.575:5.15
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