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谭伟
GeoGebra
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兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
柱體建築師
球体的体积推导（优化版）
兩位數除以一位數（二）
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三角函數
Is this a prism 4
三角形
盾牌(小動畫)
作業1
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Optimization Problems
Reflection
Exponential Functions
Differential Calculus
Median Line