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Author:
horizon liu
GeoGebra
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三角函数 的副本
第八周作业
盈利與虧蝕
平行線的判定
折扣
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Simultaneous Linear Equations 聯立二元一次方程
圓周
賺賠：例2
跑馬燈
軌跡方程式-弦中點
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Conic Sections
LCM and GCD
Plane Figures or Shapes
Hyperbola
Trigonometric Functions