.目录Unit1:The Language of Music(音乐的语言)2Unit2:Schooling and Education(上学与受教育)4Unit3:The Defini tion of Price(价格的定义)5Unit4:Electricity(电)6Unit5:The Beginning of Drama(戏剧的起源)7Unit6:Television(电视)8Unit7:Andrew Carnegie(安德鲁卡内基)10Unit8:American Revolution(美国革命)11Unit9:Suburbanization(郊区的发展)12Unit10:Types of Speech(语言的类型)13Unit 11Archaeology(考古学)14Unit12:Museums(博物馆)15Unit 13SkyscrapersandEnvironment(摩天大楼与环境)16Unit14:A Rare Fossil Record(罕见的化石记录)17Unit