出版說明 To the Teacher Seps for the Reader Vocabulary Words and Definitions Concept I:Nature or People Limit Things That Can Be Done Nothing Can Move That Fast New Tools for an Old Science One-Eyed People and Terrible Monsters They Were Not Free The Escape of the Sea Otters Too Many Lemmings Favorite Foods from Far Away Sources of Power They Were Not Allowed to Fight A Dangerous Land Hot Rivers or Cool Rivers Land of the Tsetse Fly Diving into Danger Evil Spirits Lived There A Passport to Travel Traveling Animals Walls of Concrete Buildings Full of Light The Curious Brother Concept II:The Use of Earth,Space and Materials Depends on the Needs of the Users A Rock with Three Names Danger in the Sky Looking for Stars The Library at Alexandria A Bathtub Made of Clay All Roads Lead to Rome A Seashell Is Its House Farmers of the Ant World Artists of the Bird World The Water Road Above the Frozen Layer A New Tree for Ghana The Wonderful Gift From Needles to Leather Tools of Stone A Village of Coppersmiths They Gave Their Country New Life A Desert to Conquer Windows in the Earth Written in the Trees Clues to the Past A New Treaty The Road across the Mountains New Schools for New Lands Artists Without Brushes Some Work with Metal Away to Decorate a Building Concept III:The Success of a Community Depends on Cooperation Among Its Members
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