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Author:
詠甯
GeoGebra
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拼砌四邊形
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
【案例】2018年全国1卷理科12题
兩位數除以一位數(一)
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Opening Box
中心对称
橢圓1-同心圓法
欧拉线
新手任务绘本
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Arithmetic
Conditional Probability
Ratios
Kite
Derivative