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下列各组物质中,属于同系物的是
A.HCHO、CH3COOH B.、
C.CH3COOH、CH3CH2OH D.CH3Cl CH3CH2Cl
A.HCHO、CH3COOH B.
C.CH3COOH、CH3CH2OH D.醋酸、硬脂酸
A.乙苯和二甲苯 B.CH2=CHCH2CH3和CH3CH=CHCH3
C.CH3CH2CH3和CH3(CH2)2CH3 D.CH3CH2OH和CH3OCH3