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fei liu
GeoGebra
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正方形雪花图案
第八周作业1
比較五件物件的重量
盈利與虧蝕
斐波那契螺旋弧线（表格法-可动态调节）
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Addition and Subtraction of Polynomials 2 (多項式的加減法2)
堆朵4邊形(試算表版)
量度身高
五邊形的簡介
拋物線3-平行四邊形法
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Curve Sketching
Cube
Probability
Diagrams
Means