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光的折射(光线自右下向左上)
Author:
樊双平
GeoGebra
New Resources
兩位數加法
【案例】2018年全国1卷理科12题
判斷球體
拼砌四邊形
異分母分數減法
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task3
Proof1 楊玉峰
畢氏定理動畫
不規則圖形的周界(intro)
劉徽的「割圓術」的副本
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Cube
Equations
Piecewise Functions
Polygons
Trapezoid