高考问答拍卖博弈论:please tell me whether I can buy a train ticket from Beijign to Datong in a third city. Thank you
来源：百度文库 编辑：高考问答 时间：2024/05/01 00:01:50
Call the ticket-sellers to buy tickets, and ask a friend to send them to you.
Or ask friends to buy and send them to you. You'll pay for the tickets when they are sent to you.