A.紫外-可見吸收光譜 B.分子熒光譜 C.紅外光譜 D.原子吸收光譜
A.0 B.1 C.2 D.3
A.CH3-CHO B.CH3-CO-CH3 C.CH3-CHOH-CH3 D.CH3-O-CH2-CH3