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play tennis
Author:
李春培
play tennis
GeoGebra
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探究三角形的全等條件
多邊形的面積
祖冲之的期望：内棋与外棋
讀磅
圓的切線方程
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高美濕地風車2
Homework3
兩條數線比較
Pokemon quiz (daliy)
平面截圆柱体
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Special Points
Step Functions
Trigonometry
Set Theory
Polygons