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最短路径
Author:
陈云波
Topic:
Optimization Problems
最短路径
GeoGebra
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異分母分數減法
三位數除以一位數（一）
兩位數除以一位數（一）
四邉形 (四年級) 教師版
球體建築師
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GeoGebra作圖─ＲＨＳ全等
ie 4
GGB4
สำเนาของ 河內塔 (Tower of Hanoi)
S3 WS4.3 Q02(3D圖)
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Angles
Distributions
Equations
Triangles
Fractions