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教学素材：椭圆离心率
Author:
清风拂琴，陌上花开
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
異分母分數減法
第八周作业
Discover Resources
標準分解式與方根化簡
圖I
tool
太极图
梯形的高
Discover Topics
Upper and Lower Sum or Riemann Sum
Special Points
Parametric Curves
Rhombus
Cuboid