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立体几何
Author:
圆锥曲线
GeoGebra
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【案例】2018年全国1卷理科12题
拼砌四邊形
兩組對邊相等和有直角的四邊形
四邊形的特性
兩位數除以一位數（二）
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三角函數
Quiz on Angle between a Line and a Plane 線面角：測驗
Center_Circle_Solution
數線_小數的認識
三角函数求值 （单位圆、比值）
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General Quadrilateral
Arithmetic
Planes
Pie Chart or Circle Chart
Logarithmic Functions