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  • Unit °­Àdz»¿ë(ÁÖÁ¦) ºÐ·®
    1 Reading Maps 15ºÐ
    2 Mountains, Rivers, and Deserts of the World 17ºÐ
    3 A World of Trade 18ºÐ
    4 Ancient Trade 16ºÐ
    5 The Gift of the Nile 16ºÐ
    6 The Culture of Egypt 16ºÐ
    7 Ancient Greece 17ºÐ
    8 Socrates and Plato 17ºÐ
    9 Ancient Rome 17ºÐ
    10 The Founding of Rome 17ºÐ
    11 Europe in the Middle Ages 19ºÐ
    12 Feudalism 18ºÐ
    13 What Is the Scientific Method? 17ºÐ
    14 Scientific Tools 16ºÐ
    15 What Are Cells? 17ºÐ
    16 Classifying Living Things 14ºÐ
    17 What Is Heredity? 16ºÐ
    18 What Are Traits? 16ºÐ
    19 The Formation of the Earth 18ºÐ
    20 Continental Drift 14ºÐ
    21 Light and Heat 17ºÐ
    22 Electricity 17ºÐ
    23 Motion and Force 17ºÐ
    24 Simple Machines 18ºÐ
    25 Understanding Fractions 21ºÐ
    26 Word Problems with Fractions 20ºÐ
    27 Lines and Angles 18ºÐ
    28 Polygons, Triangles, and Circles 19ºÐ
    29 Prefixes and Suffixes 18ºÐ
    30 Tenses 18ºÐ
    31 Complete Sentences 19ºÐ
    32 Proofreading 20ºÐ
    33 The Art of the Middle Ages 22ºÐ
    34 The Art of Islam and Africa 19ºÐ
    35 Musical Notation 18ºÐ
    36 Composers and Their Music 18ºÐ

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