论文部分内容阅读
北京地铁以其快捷、方便、经济、舒适、准点的优势,力压群芳,已成为人们出行的首选。城市轨道交通是城市公共交通的重要组成部分,尤其是在城市规模日益扩大,城市人口日益增加,
Beijing Subway has become the first choice of people’s travel because of its quick, convenient, economical, comfortable and punctual advantages. Urban rail transit is an important part of urban public transport, especially in the growing scale of the city, the increasing urban population,