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正方形折纸减去两角
Author:
孟宝兴
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
球體建築師
找出對稱軸
【案例】2018年全国1卷理科12题
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龍騰4_1-1課例5
二項分配與常態分配圖形的比較
三角測量01
(008)80102
圓內接四邊形的圓周角
Discover Topics
Sine
Root
Tangent Line or Tangent
Variance
Rational Numbers