在一列从南方开往北京的特快列车的第十一号硬座车厢里,相对坐着四个旅客。这四位旅客的目的地分别是徐州、济南、德州和北京。列车在南京站停靠十三分钟,四位旅客都离开了自己的座位。十三分钟后,列车继续北行。当他们都回到自已的座位时,去北京的旅客,突然发现自己的公文包丢失了,里面有二百元现金。丢失公文包的旅客说:“列车靠站之前,公文包一直放在行李架上。后来我到列车办公室去问有没有卧铺,回来发现公文包没有了。”去徐州的旅客说,列车停靠时,他到十号车厢去看望同事了。去济南的旅客说,他那时正好上厕所解手去了。去德州的旅客说,他下站去看看有没有鸭肫肝买。乘务员和乘警交换了一下眼色,耳语了几句,对其中一个旅客说:“请你到办公室来一趟!” In the eleventh hard-seat carriage of an express train bound for Beijing from the south, there are four passengers. The destinations of the four passengers are Xuzhou, Jinan, Dezhou and Beijing. The train stopped at Nanjing Station for 13 minutes and all four passengers left their seats. Thirteen minutes later, the train continued northbound. When they all returned to their seats, travelers to Beijing suddenly discovered that their briefcase was lost and there were 200 yuan in cash. The passenger who lost the briefcase said: “Before the train stood, the briefcase remained on the luggage rack. Then I went to the train office to ask if there were any sleepers, and I came back and found that the briefcase was gone.” The passengers who went to Xuzhou said that when the train stopped. He went to the tenth car to see his colleagues. The passengers who went to Jinan said that he had just gone to the toilet and left. A visitor to Texas said he went down to see if he had a duck liver. The flight attendant exchanged a glance with the police and whispered a few words. He said to one of the passengers, “Please come to the office and see!”