Unit OneFocus on:ChronologyChapter 1Napoleon:From Schoolboy to EmperorChapter 2Pompeii:Destroyed, Forgotten, and FoundChapter 3Lance Armstrong:Survivor and WinnerUnitTwoFocus on:ProcessChapter 4The Internet:How It WorksChapter 5Language:How Children AcquireTheirsChapter 6Hydroponic Aquaculture:How One System WorksUnitThreeFocus on:Classification/DefinitionChapter 7A Tidal Wave:What Is It? What Causes It? How Can We Predict It?Chapter 8Levels of Language Usage:Formal and InformalChapter 9Power:The Kinds People Use and AbuseUnit FourFocus on:Comparison/ContrastChapter 10Asian and African Elephants:Similarities and DifferencesChapter 11Lincoln and Kennedy:Similar DestiniesChapter 12The Titanic and the Andrea Doria:Tragedies at SeaUnit FiveFocus on:Causal AnalysisChapter 13Dinosaurs:WhyThey DisappearedChapter 14The American Civil War:Why It HappenedChapter 15Endangered Species:What Are the CausesAudioscripts and Answer Keys这是目录。。想要这个的文本。谢谢