A.體積收縮,強(qiáng)度降低 B.體積收縮,強(qiáng)度提高 C.體積膨脹,強(qiáng)度降低 D.體積膨脹,強(qiáng)度提高
A.8.0% B.12.0% C.15.0% D.16.0%
A.0.3% B.0.4% C.0.5% D.0.6%