单项选择题
A.果糖 B.葡萄糖 C.糖原 D.乳糖
A.噻唑环 B.吡啶环 C.嘧啶环 D.哌嗪环
A.(CH3)2NH B.(CH3)3N C.(CH3)3CNH2 D.CH3NH2
A.CH3OC6H5 B.CH3CHOHCH2CH3 C.CH3COCH2CH3 D.CH3CH2CH2CHO
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