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13-4-1-劈尖干涉条纹分布-尤景汉
Author:
王翚
GeoGebra
New Resources
圓的切線方程
祖冲之的期望：内棋与外棋
兩位數加法
垂直線的斜率
三位數除以一位數（二）
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Clock24hour
平方差
Quiz on Projection of a Line Segment on a Plane 投影：測驗
田中太郎
我的第一个GGB绘本
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Centroid or Barycenter
Integral Calculus
Inequalities
Vectors
Polynomial Functions