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Jiawen Yun
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Jiawen Yun
GeoGebra
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錐體建築師
球体的体积推导（优化版）
判斷球體
【案例】2013年安徽高考15题
兩位數加法
Discover Resources
工作紙題2
餘弦定理修正項及風車證明
三角形內心
正多邊形的對角線
爱奇艺
Discover Topics
Vectors 3D (Three-Dimensional)
Random Experiments
Subtraction
Quadratic Equations
Circle