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教学素材：离心率相同的双曲线
Author:
清风拂琴，陌上花开
GeoGebra
New Resources
折扣
第三周作业效果演示
盈利與虧蝕
第八周作业3
第八周作业1
Discover Resources
Mars Retrograde
Rolling Star
颱風暴風圈
鸚鵡螺旋線
正方体的展开图（彩色3d版 net cube）
Discover Topics
Quadratic Functions
Equilateral Triangles
Sine
Trigonometric Functions
Diagrams