美国是个经济发达和高度现代化的国家，其丰富的自然资源和多样的民族文化使它成为极具吸引力的旅游国家。小费：机场搬运人员和宾馆服务生为旅客服务时，游客应付一定小费，一般按每件行李一美元算。 礼仪：不小心与人碰撞，要说“Sorry”..

THIS IS AMERICA - Spirit of the Season: Christmas Music and Traditions in AmericaBy Shelley GollustBroadcast: Monday, December 19, 2005(MUSIC)ANNOUNCER: Millions of Americans will celebrate Christmas on December Twenty-F..

美国：移民之国A look at the history of the United States indicates that this country has often been called a melting pot, where various immigrant and ethnic groups have learned to work together to build a unique nation. ..