下列各组物质中,属于同系物的是          A. CH2=CH-COOH,CH3-CH2-

下列各组物质中,属于同系物的是         

A. CH2=CH-COOHCH3-CH2-CH2-COOH               

 B. 乙烷,2233—四甲基丁烷

答案

B

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