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橢圓內的光線反射 獻給聰哥
Author:
宋政蒲
Topic:
Ellipse
,
Reflection
橢圓內的光線反射
GeoGebra
New Resources
sanjiaohanshu
拼砌四邊形
球體建築師
【案例】2018年全国1卷理科12题
兩位數除以一位數（一）
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star1
畢氏定理完成20170330final
周界
regtrg
繪畫平行四邊形
Discover Topics
Expected Value
Rectangle
Median Line
Subtraction
Unit Circle