目录 Introduction How to Use This Book Chapter 1 Social Studies ★ History and Geography ① | 9 Unit 01 Our Community 社会环境 | 10 Unit 02 Home and School Life 家庭与学校生活 | 14 Unit 03 Different Cultures and Holidays 文化与节日差异 | 18 Unit 04 The American Government 美国政府 | 22 Unit 05 World Religions 世界宗教 | 26 Review Test 1 | 30 Chapter 2 Social Studies ★ History and Geography ② | 31 Unit 06 Our Land and Water 土地与水资源 | 32 Unit 07 Oceans and Continents 海洋与大洲 | 36 Unit 08 Maps and Directions 地图与方位 | 40 Unit 09 Our Earth and Its Resources 我们的地球和资源 | 44 Unit 10 Native Americans and Europeans in the New World 新大陆的美洲印第安人和欧洲人 | 48 Review Test 2 | 52 Chapter 3 Science ① | 53 Unit 11 Seasons and Weather 季节与气候 | 54 Unit 12 The Parts of a Plant 植物的组成部分 | 58 Unit 13 Homes for Living Things 生物的栖息地 | 62 Unit 14 Oceans and Undersea Life 海洋和水生生物 | 66 Unit 15 The Human Body 人体 | 70 Review Test 3 | 74 Chapter 4 Science ② | 75 Unit 16 How Can Matter Change? 物质如何变化? | 76 Unit 17 How Long? How Tall? 多长?多高? | 80 Unit 18 Electricity 电 | 84 Unit 19 Our Solar System 太阳系 | 88 Unit 20 Inside the Earth 地球的内部 | 92 Review Test 4 | 96 Chapter 5 Mathematics | 97 Unit 21 Shapes 形状 | 98 Unit 22 Numbers and Counting 数字和计数 | 102 Unit 23 Addition and Subtraction 加法和减法 | 106 Unit 24 Counting Money 数钱 | 110 Review Test 5 | 114 Chapter 6 Language ★ Visual Arts ★ Music | 115 Unit 25 Read and Write 阅读和写作 | 116 Unit 26 Types of Writing 写作的类型 | 120 Unit 27 A World of Lines and Colors 线条与色彩的世界 | 124 Unit 28 A World of Paintings 绘画的世界 | 128 Unit 29 Instruments and Their Families 乐器的种类 | 132 Unit 30 A World of Music 音乐的世界 | 136 Review Test 6 | 140 Index | 141 Answers and Translations | 147
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