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任务10：黄金螺线与向日葵
Author:
陈丽婷
GeoGebra
New Resources
中华人民共和国国旗
龙形曲线-分形龙2
龙形曲线-分形龙
第八周作业2
双心四边形
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音樂會的入場人數
Ex5D#8
CIRCLE
垂心
Copy of 二次函數圖形
Discover Topics
Orthocenter
Numbers
Triangles
Straight Lines
Optimization Problems