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1989全国理21
Author:
常振虎
GeoGebra
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【案例】2013年安徽高考15题
【案例】圆柱体内放置一个大球六个小球
圓的切線方程
讀磅
兩位數除以一位數（二）
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動態比大小
repetitive squares by excel
扇形旋轉2
雙曲線的題目的副本
畫三角形 題1b 的複本
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Curve Sketching
Quadrilaterals
Pie Chart or Circle Chart
Standard Deviation
Similarity Transformation or Similarity