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分段函数
Author:
龚洪萍
GeoGebra
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第八周作业2
三角函数 的副本
正方形雪花图案
斐波那契螺旋弧线（表格法-可动态调节）
撒针估算面积实验
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暗棋的步距
Problem 1
Key stage 1
test1
线段的最值
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Trigonometry
Histogram
Fractions
Cube
Polynomial Functions