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三角形三边关系
Author:
叶明杰
GeoGebra
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比較五件物件的重量
异形操场
撒针估算面积实验
球体的截面
折扣
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龍騰4_1-1習9
线段的最值
高次方程的一阶导数范例
运动
[洋葱] 与相似有关的动点问题-下(0059)
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Logarithmic Functions
Mathematics
Square
Rhombus
Geometric Transformations