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椭圆的参数方程的副本
Author:
xiaodandan
,
梁航宇
GeoGebra
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兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩位數加法
畫出對稱圖形
柱體建築師
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How to draw a triangle with ruler and compasses?
B6 二次函數
黃金矩形
【初中】动点问题
刘校安排（1）
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Cube
Limits
Vectors
Constructions
Real Numbers