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正三角形在长方形边上移动加滚动
Author:
赵林
GeoGebra
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GeoGebra笔记功能体验课件
三位數除以一位數(二)
拼砌四邊形
四邉形 (四年級) 教師版
【案例】2018年全国1卷理科12题
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Comparing fractions using number lines and rectangles
相似三角形
ex_1
二次函數
判斷球體
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Cube
Percentages
Similar Triangles
Definite Integral
Exponent