Withmoreandmorecarso的精选

问题详情：Withmoreandmorecarsontheroad,thetrafficjamwillhappen.Howdoweseeitandhowcanwesolvetheproblem?Weknowthatthetrafficjamhappensinmanyplaces,especiallyinbigcities.Whatarereasonsfortheproblem?Ononeha...