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圆锥曲线第二定义
Author:
冯伟冀
Topic:
Conic Sections
GeoGebra
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兩位數加法
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
拼砌四邊形
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拋物線軌跡圖
蒙日定理
四心的變化II
拋體運動
PTCCS2new2
Discover Topics
Congruence
Arithmetic Mean
Incircle or Inscribed Circle
Hypergeometric Distribution
Rational Numbers