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Lagrange
Author:
林宗穎
GeoGebra
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四邉形 (四年級) 教師版
兩位數除以一位數（二）
判斷球體
異分母分數減法
柱體建築師
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時間參數跳躍函數與向量搭配
test
Copie de 分數與小數
兩位數除兩位數(例子一)
金惠吉：光的反射与折射
Discover Topics
Rational Numbers
Conditional Probability
Real Numbers
Triangles
Orthocenter