A.乙醇的質(zhì)量分?jǐn)?shù)為95% B.乙醇的體積分?jǐn)?shù)為95% C.乙醇的質(zhì)量百分濃度為95% D.乙醇的質(zhì)量分?jǐn)?shù)為5%
A.697.5nm B.530nm C.630nm D.425nm
A.全數(shù)值 B.修約值 C.平均值 D.比較值