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Author:cherry910502

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近似值：有效數字
sanjiaohanshu
找出對稱軸
四邊形的特性
湖南省张毅郴数字教研工作室 logo

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Rectangle_01
rotational symmetry_1
三次函數
內心
连续开方（制作：谢建华，修订：孟宝兴）

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Continuity
Translation
Special Points
Geometric Distribution
Calculus

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