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知己
GeoGebra
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第八周作业
龙形曲线-分形龙
平行線的判定
斐波那契螺旋弧线（表格法-可动态调节）
双心四边形
Discover Resources
Normal dist. (常態分布互動ggb)
中垂線性質
平行四邊形面積
曾卉君的作品
椭圆与圆的关系的副本
Discover Topics
Integral Calculus
Statistics
Linear Equations
LCM and GCD
Right Triangles