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任务12：手拉手模型
Author:
陈丽婷
GeoGebra
New Resources
直線的斜率：水平變化 & 鉛垂變化
斐波那契螺旋弧线（表格法-可动态调节）
盈利與虧蝕
百分數及其應用
常见四边形是否是双心四边形
Discover Resources
線、面平行
Introduce Tangent Ratio
标题
金惠吉：光的反射与折射
拋物線軌跡
Discover Topics
Line Segment
Parametric Curves
Trapezoid
Trigonometric Functions
Curve Sketching