Introduction How to Use This Book Chapter 1 Social Studies ★ History and Geography① | 9 Unit 01 Our Community社會(huì)環(huán)境 | 10 Unit 02 Home and School Life家庭與學(xué)校生活 | 14 Unit 03 Different Cultures andHolidays 文化與節(jié)日差異 | 18 Unit 04 The American Government美國(guó)政府 | 22 Unit 05 World Religions世界宗教 | 26 Review Test 1 | 30 Chapter 2 Social Studies ★ History and Geography② | 31 Unit 06 Our Land and Water土地與水資源 | 32 Unit 07 Oceans and Continents海洋與大洲 | 36 Unit 08 Maps and Directions地圖與方位 | 40 Unit 09 Our Earth and Its Resources我們的地球和資源 | 44 Unit 10 Native Americans and Europeans in theNew World 新大陸的美洲印第安人和歐洲人 | 48 Review Test 2 | 52 Chapter 3 Science ① | 53 Unit 11 Seasons and Weather季節(jié)與氣候 | 54 Unit 12 The Parts of a Plant植物的組成部分 | 58 Unit 13 Homes for Living Things生物的棲息地 | 62 Unit 14 Oceans and Undersea Life海洋和水生生物 | 66 Unit 15 The Human Body 人體 | 70 Review Test 3 | 74 Chapter 4 Science ② | 75 Unit 16 How Can Matter Change?物質(zhì)如何變化? | 76 Unit 17 How Long? How Tall?多長(zhǎng)?多高? | 80 Unit 18 Electricity 電 | 84 Unit 19 Our Solar System太陽(yáng)系 | 88 Unit 20 Inside the Earth地球的內(nèi)部 | 92 Review Test 4 | 96 Chapter 5 Mathematics | 97 Unit 21 Shapes 形狀 | 98 Unit 22 Numbers and Counting數(shù)字和計(jì)數(shù) | 102 Unit 23 Addition and Subtraction加法和減法 | 106 Unit 24 Counting Money 數(shù)錢 | 110 Review Test 5 | 114 Chapter 6 Language ★ Visual Arts ★ Music | 115 Unit 25 Read and Write 閱讀和寫作 | 116 Unit 26 Types of Writing 寫作的類型 | 120 Unit 27 A World of Lines and Colors線條與色彩的世界 | 124 Unit 28 A World of Paintings繪畫的世界 | 128 Unit 29 Instruments and Their Families樂(lè)器的種類 | 132 Unit 30 A World of Music 音樂(lè)的世界 | 136 Review Test 6 | 140Index | 141 Answers and Translations | 147