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有理数加法几何意义及加法法则
Author:
周胜华
GeoGebra
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科赫雪花
龙形曲线-分形龙
活动三:应用性质
平行線的判定
双心四边形
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周界2
两平面夹角1
拋物線軌跡
尝试绘本
多普勒效应动态演示
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Orthocenter
Volume
Upper and Lower Sum or Riemann Sum
Trigonometry
Integers