题目

下列物质中沸点最高的是 A．CH3(CH2)3CH3                    B．CH3(CH2)2CH3 C．(CH3)3CH                        D．(CH3)2CHCH2CH3 答案：A48. —些人整天忙于工作，没有时间与家人待在一起。Some people are busy with their work and have time for their families.