Introduction How to Use This Book Chapter 1 Social Studies * History and Geography ① Unit 01 Building Citizenship 建立公民权 Unit 02 Moving to a New Community 移居新国家 Unit 03 Lots of Jobs 各种工作 Unit 04 The Geography of the United States 美国的地理环境 Unit 05 American Federal and Local Governments 美国联邦政府与地方政府 Review Test 1 Chapter 2 Social Studies * History and Geography ② Unit 06 Native Americans and Their Culture 印第安人与印第安文化 Unit 07 The Early Americans 早期的美国人 Unit 08 The Europeans Come to the New World欧洲人来到新大陆 Unit 09 The English Come to America 英国人来到美洲 Unit 10 American Independence 美国独立 Review Test 2 Chapter 3 Science ① Unit 11 Living and Nonliving Things 生物与非生物 Unit 12 Kinds of Animals 动物的种类 Unit 13 The Life Cycle of an Animal 动物的生命周期 Unit 14 Plants 植物 Unit 15 The Food Chain 食物链 Review Test 3 Chapter 4 Science ② Unit 16 Insects 昆虫 Unit 17 The Solar System 太阳系 Unit 18 The Human Body 人体 Unit 19 Motion and Forces 运动与力 Unit 20 Sound声音 Review Test 4 Chapter 5 Mathematics Unit 21 Numbers from 1 to 100 数字：从1到100 Unit 22 Time 时间 Unit 23 Solid Figures and Plane Figures 立体图形与平面图形 Ur:24 Multiplication and Division 乘法与除法 Review Test 5 I 114 Chapter 6 Language ★ Visual Arts ★ Music Unit 25 Learning About Language 如何学习语言 Unit 26 Familiar Sayings 常见格言与谚语 Unit 27 Visual Arts 视觉艺术 Unit 28 Architecture 建筑学 Unit 29 Many Kinds of Music 音乐的种类 Unit 30 Musical Instruments 乐器 Review Test 6 Index Answers and Translations
