说明：  长途汽车信息管理系统主要是由路线信息表、汽车信息表、票价信息表三部分组成，通过对这三个表的添加、删除、查找、修改等操作来实现对长途汽车的管理。
(The bus information management system is mainly composed of route information table, vehicle information table, fare information table is composed of three parts, the three table to add, delete, search, modify the operation to achieve the long-distance bus management.)