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任务12：手拉手模型
Author:
陈丽婷
GeoGebra
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龙形曲线-分形龙
第八周作业2
盈利與虧蝕
平行線的判定
折扣
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立體展開圖
體積的量度 4
圓上圓
gjh-e01-03 未知數邊長的三角形
arithmetic operation
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Scalene Triangles
Addition
Equations
Symmetry
Linear Programming or Linear Optimization