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12.23 圣诞树 圣诞快乐
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童话
GeoGebra
New Resources
活动三：应用性质
百分數及其應用
比較五件物件的重量
第八周作业
第八周作业3
Discover Resources
Escher 階梯 (Penrose Stair)
Ex (ASA)
旋轉體：8y² = x²(1 - x²)
Light reflected in hyperbola
初中二次函数课件设计（毕业设计）
Discover Topics
Angles
Trigonometry
LCM and GCD
Sine
Orthocenter