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關燈遊戲
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Cathyyu920311
GeoGebra
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四邉形 (四年級) 教師版
找出對稱軸
柱體建築師
錐體建築師
異分母分數減法
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旋轉一物件
平面截距式
雙曲柄
橢圓教學_2016
日照杆影演示
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Means
Sphere
Cosine
Statistics
Set Theory