单项选择题
A. B. C. D.
A.CH3OH B.CH3CHO C.HCHO D.CH3COCH3
A.CH3CH2OH B.CH3CHO C.HCHO D.CH3COCH3
A.CH3CH2CHO B.CH3COCH3 C.CH3CHO D.HCHO
微信扫一扫,加关注免费搜题