航空客运订票的业务活动包括: 查询航线, 客票预订，和办理退票, 试设计一个航空客运订票系统, 以使上述业务可以借助计算机来实现.-airline passenger booking business activities include : inquiries routes, ticket booking, and obtain refunds. Design of a test air passenger booking system, so that these operations c

航空客运订票系统 1.查询航线 2.订票 3.退票-Air passenger booking system. Queries routes 2. Booking 3. Refund