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mooc第四讲椭圆反射
Author:
单晨
GeoGebra
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四邉形 (四年級) 教師版
判斷球體
【案例】圆柱体内放置一个大球六个小球
畫出對稱圖形
三位數除以一位數（一）
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複合棒形圖: 圖二
Angle between Line and Plane
陳彤恩GGB 1/24
線段比較大小-01
全等三角形
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Secant Line or Secant
Ratios
Frequency Distribution
Similarity Transformation or Similarity
Logarithm