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保持2:3:4
Author:
hjyanghj
Topic:
Geometry
GeoGebra
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画直线等分三角形的面积
【案例】2013年安徽高考15题
兩位數除以一位數（一）
多邊形的面積
第八周作业
Discover Resources
parallelgram with height 20120319
snooker
函數圖形的變化（Ⅰ）
纏繞
勝者即正義，可愛即正義~
Discover Topics
Calculus
Natural Numbers
Difference and Slope
Parametric Curves
Probability