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Author:
俞光隆
GeoGebra
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四邉形 (四年級) 教師版
兩位數加法
【案例】圆柱体内放置一个大球六个小球
異分母分數減法
直角坐標平面上的旋轉變換
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Trajectory of system: y'=y^2-y
测试
滑桿應用
橢圓1--同心圓法
规律点问题的动态演示-案例一
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Exponent
Straight Lines
Plane Figures or Shapes
Numbers
Median Line