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mooc第四讲椭圆反射
Author:
单晨
GeoGebra
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柱體建築師
四邉形 (四年級) 教師版
球体的体积推导(优化版)
兩組對邊相等的四邊形
算柱 (兩位數)
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中國火柴遊戲二
p11-10
圓周率的應用 題B
五角星
动态绘制函数图象
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Trigonometry
Hypergeometric Distribution
Diagrams
Kite
Logarithmic Functions