下列各组物质一定互为同系物的是①CH3CH2OH和CH3CH3CHO②HCOOCH3和CH3COOH2CH3③CH3CH2OH和HOCH2CH2OH④CH4和C18H38⑤C2H4和C6H12⑥CH3OH和CH3OCH3⑦葡萄糖和麦芽糖⑧淀粉搜索结果第1页,早教吧

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