下列物质的沸点按由高到低的顺序排列正确的是 ( )
①CH3(CH2)2CH3②CH3(CH2)3CH3③(CH3)3CH ④(CH3)2CHCH2CH3
A. ②④①③ B. ④②①③ C. ④③②① D. ②④③①
A