Introduction How to Use This Book Chapter 1 Social Studies History and Geography �� | 9 Unit 01 Economics �����W | 10 Unit 02 World Geography ������� | 14 Unit 03 Asian Civilizations �������� | 18 Unit 04 Ancient Greek and Roman Civilizations ��ϣ�D�c�_�R���� | 22 Review Test 1 | 26 Chapter 2 Social Studies History and Geography �� | 27 Unit 05 From the Middle Ages to the Reformation �������o���ڽ̸ĸ� | 28 Unit 06 The Enlightenment and the French Revolution �����\���c��������� | 32 Unit 07 Imperialism �ۇ����x | 36 Unit 08 World War II and after the War �ڶ����������c��� | 40 Review Test 2 | 44 Chapter 3 Science �� | 45 Unit 09 Classifying Living Things ����ķ�� | 46 Unit 10 Cells and Heredity �����c�z�� | 50 Unit 11 Plant Growth ֲ������L | 54 Unit 12 Ecosystems ���Bϵ�y | 58 Unit 13 The Human Body and the Immune System ���w�c����ϵ�y | 62 Review Test 3 | 66 Chapter 4 Science �� | 67 Unit 14 Earth's Surface ������� | 68 Unit 15 Earth's Rocks and Fossils ����Ďrʯ�c��ʯ | 72 Unit 16 Oceans and Ocean Life �����c�������� | 76 Unit 17 Matter ���| | 80 Unit 18 Light and Energy ���c���� | 84 Review Test 4 | 88 Chapter 5 Mathematics | 89 Unit 19 Numbers and Computation �����cӋ�� | 90 Unit 20 Probability and Statistics �����c�yӋ | 94 Unit 21 Measurement �y�� | 98 Unit 22 Geometry �׺ΌW | 102 Review Test 5 | 106 Chapter 6 Language Visual Arts Music | 107 Unit 23 Poetry and Stories Ԋ���c���� | 108 Unit 24 Grammar and Usage �Z���c�÷� | 112 Unit 25 Common English Sayings and Expressions ��ҊӢ���V�Z�ͱ��_��ʽ | 116 Unit 26 Classical Art �ŵ�ˇ�g | 120 Unit 27 From Baroque Art to Realism �İ����ˇ�g���������x | 124 Unit 28 A World of Music ���������� | 128 Review Test 6 | 132 Index | 133 Answers and Translations | 139