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2017陕西14题
Author:
杨华
GeoGebra
New Resources
活动三：应用性质
双心四边形
科赫雪花
盈利與虧蝕
折扣
Discover Resources
直線方程式--斜率比較
五角錐體
圓錐曲線 vs.雙曲線定義式
均分除法（分數÷整數）
Mathematics and Optics (and their applications)
Discover Topics
Rotation
Straight Lines
Geometric Transformations
Parallelogram
Division