A.450g±5g水泥B.450g±2g水泥C.1350g±5g砂子D.225mL±1mL水
A.80μm方孔篩篩余不大于10%B.45μm方孔篩篩余不大于30%C.80μm方孔篩篩余不大于30%D.45μm方孔篩篩余不大于10%
A.3B.5C.6D.8