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顛倒的圖片：凹洞凸洞
Author:
李冠邑
GeoGebra
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中華民國國旗 (Codex╱2026.10.06)
美國國旗 (Claude 版)
sanjiaohanshu
湖南省张毅郴数字教研工作室 logo
Fibonacci Clock
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柏拉圖多面體 Platonic Solids
General Form of Quadratic Functions 二次函數的圖像：一般式
圓例4
外心(劉虹圻 高二三26)
椭圆的参数方程的副本
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Median Line
Cylinder
Matrices
Set Theory
Sphere