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二次函数y=ax²（a＞0)
Author:
吕胜
GeoGebra
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四邊形的特性
球體建築師
sanjiaohanshu
算柱 (兩位數)
找出對稱軸
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空間中平面
立體圖形
Hyperbolic
正方体展开图的副本
S3 Ex4.3 Q05(3D圖)
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Vectors
Circle
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