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Author:
李春培
GeoGebra
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四邊形的特性
第八周作业
畫出對稱圖形
画直线等分三角形的面积
兩位數除以一位數(二)
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BkD_act15_02c
規律幾何圖形珠串
梯形堆垛
示例2
初中数学教学素材
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Exponent
Probability
Congruence
Line Segment
Sequences and Series