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凸透鏡成像_由像到物_橢圓到圓
Author:
澳坊物理
Topic:
Circle
,
Conic Sections
,
Constructions
GeoGebra
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異分母分數減法
兩位數加法
錐體建築師
畫出對稱圖形
四邉形 (四年級) 教師版
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i love you
Quiz on Compass Bearings 羅盤方位角：測驗
scalar multiplication
異分母分數加法
折纸角度探究1
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Mode
Derivative
Sequences and Series
Rhombus
Arithmetic Operations