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luodeqin@keleshuxue.com
GeoGebra
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撒针估算面积实验
第三周作业效果演示
第八周作业
折扣
双心四边形
Discover Resources
binary and hexadecimal
Primary School Mathematics Collection
二項分布 (黑板)
IMO2015C
单晨整体迭代希尔伯特皮亚诺(HilbertPeano)
Discover Topics
Geometric Mean
Multiplication
Rhombus
Line Segment
Fractal Geometry