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钟表制作成功啦
Author:
辛贺华
GeoGebra
New Resources
第八周作业
画直线等分三角形的面积
圓的切線方程
球体的体积推导（优化版）
祖冲之的期望：内棋与外棋
Discover Resources
銀杏葉
相似結合畢氏定理問題
ptccs2new
GGB 案例分享
活工(二)Q1
Discover Topics
Scatter Plot
Rectangle
Incircle or Inscribed Circle
Fractal Geometry
Differential Equation