A.不大于45% B.不大于40% C.不大于35% D.不大于30%
A.水泥 B.石灰 C.粉煤灰 D.礦渣
A.0.3~0.5% B.0.5~0.7% C.0.5%~1.0% D.1.0%~1.5%