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正八面体1
Author:
徐士权
GeoGebra
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比較五件物件的重量
折扣
椭圆内切圆链
常见四边形是否是双心四边形
第八周作业1
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pictures
優良作品1(沛綺)
ie 9
Ex5C#13
鉛筆畫圓
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Probability
Equilateral Triangles
Scalene Triangles
Triangles
Logic