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mooc第四讲椭圆反射
Author:
单晨
GeoGebra
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兩組對邊相等和有直角的四邊形
異分母分數減法
拼砌四邊形
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
Discover Resources
中點軌跡
斜拋模型
中位线的副本
鉛筆畫圓
方格紙上畫正方形 2
Discover Topics
Frequency Distribution
Quadrilaterals
Polynomial Functions
Exponential Functions
Secant Line or Secant