Part 1 Social Studies 社会科学
1. The First Americans and the Land They Found **批美洲人及美洲的发现 ...............2
2. How the American Indians Lived 印第安人如何生存 ..........................................................8
3. National Profiles of the United States 美国概况 ...............................................................15
4. American Symbols 美国的象征 .............................................................................................22
5. Patriotic Documents 爱国文献 ..............................................................................................27
6. Land of Second Chances 赐予二次机遇的土地 .................................................................36
7. The Flag Etiquette 国旗礼仪 ..................................................................................................42
Part 2 Science 自然科学
8. Discoveries 发现 ......................................................................................................................49
9. The Universe 宇宙 ...................................................................................................................58
10. Genes 基因 .............................................................................................................................65
11. Ecology 生态 ...........................................................................................................................72
12. Communications 通信 ..........................................................................................................82
13. Body Defenses 人体防御 .....................................................................................................91
14. The Animal Kingdom 动物王国 ...........................................................................................99
15. Volcanoes 火山 ....................................................................................................................106
16. Franklin's Folly 富兰克林的荒唐事 ....................................................................................114
Part 3 Literature 文学
17. Doc Brackett 布莱克特医生 ................................................................................................122
18. After Twenty Years 二十年后 .............................................................................................129
19. Companions 伙伴 ................................................................................................................140
20. The Discontented Pendulum 不满的钟摆 .......................................................................146
21. Mending Wall 补墙 ..............................................................................................................154
22. A Lesson from the Eagle 雕的启示 ..................................................................................160
23. Cheerfulness 快乐 ...............................................................................................................167
Part 4 Life Encyclopedia 生活百科
24. Renaissance Period Music and Art 文艺复兴时期的音乐和绘画 ...............................175
25. First Aid and Your Body 急救和人体 ................................................................................181
26. Dealing with Stress 缓解压力 ............................................................................................187
27. Nutrition 营养 ........................................................................................................................193
28. Alcohol 酒 ..............................................................................................................................202
29. Environmental Safety: Preparing for the Worst 环境安全: 做好*坏的打算 .........208
30. Cancer 癌症 .........................................................................................................................217