A.對(duì)比水泥:450gB.標(biāo)準(zhǔn)砂:1350gC.水:225gD.礦渣粉:225g
A.對(duì)比水泥:250gB.標(biāo)準(zhǔn)砂:750gC.水:125gD.對(duì)比水泥:175g
A.105±5B.150±5C.250±10D.300±10