A.120g/L B.110g/L C.105g/L D.100g/L E.90g/L
A.干拌砂漿B.砂漿C.砂石D.混合砂漿
A.農(nóng)業(yè)社會B.經(jīng)濟(jì)主義C.科技社會D.社會主義