北京街头,每当上下班的高峰期,车流滚滚,经常可见各种各样的车子排成一条长龙。这些车子中,高档的有奔驰、宝马,中档的有桑塔纳等等。当然,更有我们大多数人的代步工具:公共汽车。毫无疑问,这代步工具档次的高低,无疑也就代表了使用它们的人所拥有的财产或者收入的高低。那么, Beijing streets, whenever the rush hour, traffic billowing, often see a variety of cars lined up in a queue. These cars, high-end Mercedes-Benz, BMW, mid-range Santana and more. Of course, there are more means of transport for most of us: the bus. There is no doubt that the level of this means of transport tools will undoubtedly represent the level of property or income owned by those who use them. Well,