A.K30、K、Evd B.K30、Evd、n C.K30、Evd、n、K D.K30、K、Ev2
A.17 B.10 C.20 D.2
A.(d≤0.075mm)的質(zhì)量占總質(zhì)量的百分?jǐn)?shù) B.(d≤0.005mm)的質(zhì)量占總質(zhì)量的百分?jǐn)?shù) C.(d≤0.02mm)的質(zhì)量占總質(zhì)量的百分?jǐn)?shù) D.(d≤2mm)的質(zhì)量占總質(zhì)量的百分?jǐn)?shù)