【单选题】A: Pilot Station this is MV Yinghe. Is the pilotage compulsory.overB: MV Yinghe. this is Pilot Station pilotage at this port is compulsory.overQ:What information can we get from this conversation?
【简答题】Part 2 (para 4-11)is an illustration of a good conversation the author had with his companinions at the bar. This conversation is centered on _____.