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erwtewt的副本
Author:
xiaodandan
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licc
tewtewtewywreywre
GeoGebra
gwwrgwertgwrfqef
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兩組對邊相等的四邊形
四邉形 (四年級) 教師版
兩位數除以一位數(二)
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
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外心
線性組合3:正方形
Math
Copy of 七巧板
周界(移邊)
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Set Theory
Diagrams
Calculus
Perimeter
Integral Calculus