A.1 B.2 C.3 D.4
A.80% B.85% C.90% D.95%
A.砂、石總用量(按質(zhì)量計(jì)) B.石用量(按質(zhì)量計(jì)) C.混凝土總量(按質(zhì)量計(jì)) D.水泥用量(按質(zhì)量計(jì))