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raya81901
GeoGebra
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镂空正方体案例对比
第八周作业
椭圆内切圆链
异形操场
斐波那契螺旋弧线(表格法-可动态调节)
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北區模考多選第八題 (2014.03.06)
教學-與直線有關的角
指數與對數函數
二元线性规划的图解法(练习1)
微積分基本定理的副本
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Arithmetic Operations
Step Functions
Similar Triangles
Bar Chart or Bar Graph
Cosine