单项选择题
A.50% B.60% C.70% D.80%
A.剥落 B.流挂 C.颗粒 D.刷痕
A.125×75×10 B.125×80×10 C.125×75×12 D.125×80×12
A.1/4~2/3 B.1/3~2/3 C.1/2~1/3 D.1/2~2/3
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