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综合（1） 3.
Author:
Sylvie
GeoGebra
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龙形曲线-分形龙2
平行線的判定
直線的斜率：水平變化 & 鉛垂變化
双心四边形
盈利與虧蝕
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vbvbvbvc
江苏省职校数学网络资源
Uses of Trigonometry
三相交流电波形模拟
算盘
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Hyperbola
Tangent Line or Tangent
Geometry
Area
Functions