现在已知： 1)A美国人是医生。 2)E和俄罗斯人是技师。 3)C和德国人是技师。 4)B和f曾经当过兵，而德国人从未参过军。 5)法国人比A年龄大；意大利人比C年龄大。 6)B同美国人下周要去西安旅行，而C同法国人下周要去杭州度假。(Now it's known: 1) A American is a doctor. 2) E and the Russians are technicians. 3) C and the Germans are technicians. 4) B and f had been a soldier, and the Germans never joined the army. 5) the French are older than the A; the Italians are older than the C. 6) B and the Americans are going to travel to Xi'an next week, while C and the French are going to Hangzhou for a holiday next week.)