单项选择题
A. B. C. D.
A.2 B.4 C.6 D.5
A.HCHO+OHCCH2CHO B.HCHO+HOOCCH2COOH C.HCHO+CH3COCHO D.CH3COCHO+CO2+H2O
A.CH3CHBrCHBrCH2CH=CHCF3 B.CH3CH=CHCH2CHBrCHBrCF3 C.CH3CHBrCH=CHCH2CHBrCF3 D.CH3CHBrCH=CHCHBrCH2CF3
微信扫一扫,加关注免费搜题