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戴德林球
Author:
冯伟冀
Topic:
Conic Sections
GeoGebra
New Resources
漂亮的摇摆曲线
球体的体积推导（优化版）
【案例】2018年全国1卷理科12题
三位數除以一位數（一）
直線的斜率
Discover Resources
方根化簡
弦心距比較
滑桿動畫2-4:畢氏定理
勝者即正義，可愛即正義～(可用Ctrl+滑鼠滾輪放大界面)
Trigonometric Ratios of Any Angle
Discover Topics
Pyramid
Trigonometry
Hyperbola
Secant Line or Secant
Arithmetic Operations