A、水泥:砂:石子:水=280:675.8:1410.3:133.7
B、水泥:砂:石子:水=280:670.8:1418.2:133.7
C、水泥:砂:石子:水=282:665.8:1410.3:133.7
D、水泥:砂:石子:水=282:675.8:1410.3:133.7
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