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追击问题
Author:
凉 清
GeoGebra
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四邊形的特性
判斷球體
球体的体积推导（优化版）
球体的体积推导
【案例】2018年全国1卷理科12题
Discover Resources
Roger Test Draw
三角形重心
優良作品1(沛綺)
gmy106a10 限制範圍的三角形面積
Solid geometry
Discover Topics
Trigonometry
Exponent
Confidence Interval
Parabola
Trigonometric Functions