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barara magic stick
Author:
Rex Chi
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未命名
程自顺102
排水法求不規則物件的體積
二次函數圖像
有趣的梯形面積問題
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七巧板奔人3
Stem and Leaf(幹葉圖)
銳角三角函數
双曲线01
棱柱
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Statistics
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Pyramid
Translation
Hyberbola