A.霉變 B.蟲(chóng)蛀 C.變色 D.粘連 E.風(fēng)化
A.0.5%~1% B.1%~3% C.2%~3% D.4%~5% E.3%~6%
A.4% B.5% C.6% D.3% E.2%