A.1處,90%B.2處,85%C.3處,80%D.4處,75%
A.厚度不應(yīng)小于100mmB.厚度不應(yīng)大于100mmC.厚度不應(yīng)小于200mmD.厚度不應(yīng)大于200mm
A.8hB.12hC.24hD.36h