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pisa tower
Author:
faanyat
GeoGebra
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双心四边形
盈利與虧蝕
百分數及其應用
龙形曲线-分形龙
折扣
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GGB風雲榜
圓外切及內切
拉格朗日插值多項式
分數互化 測試畫面 IPAD
用GGB制作奔驰轮胎.许兴华数学
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Curve Sketching
LCM and GCD
Plane Figures or Shapes
Trigonometry
Linear Functions