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陳隆期
GeoGebra
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中华人民共和国国旗
折扣
斐波那契螺旋弧线(表格法)
第三周作业效果演示
龙形曲线-分形龙2
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畢氏定理
分數比較
認識函數值
Pyth. theorem
双曲线的定义.许兴华数学
Discover Topics
Sine
Translation
Tangent Function
Addition
Function Graph