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A的影响
Author:
军云
GeoGebra
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【案例】2013年安徽高考15题
畫出對稱圖形
判斷球體
兩組對邊相等和有直角的四邊形
兩位數加法
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四下_面積（一）(學生版)
生活中的平面圖形關係─線對稱
angles in the same segment
蛇行腳踏車
直线运动
Discover Topics
Cone
Cosine
Polynomial Functions
Variance
Linear Programming or Linear Optimization