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Angle of elevation and Angle of depression(仰角和俯角)
Author:
chisunch1
GeoGebra
New Resources
【案例】2013年安徽高考15题
【案例】圆柱体内放置一个大球六个小球
直角坐標平面上的旋轉變換
判斷球體
兩位數除以一位數（一）
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Is this a prism 10
棒形圖3
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Solids or 3D Shapes
Conic Sections
Hypothesis Testing
Integers
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