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happy birthday

Author:李春培
happy birthday

New Resources

  • 球体的体积推导
  • 兩位數加法
  • 【案例】2013年安徽高考15题
  • 三位數除以一位數(一)
  • 三位數除以一位數(二)

Discover Resources

  • 擲兩個硬幣的機率分布
  • Congruent Triangles
  • Introduce tangent ratio
  • BkD_act15_02c
  • 兔子繁殖树状图(斐波那契数列)

Discover Topics

  • Poisson Distribution
  • Circle
  • Bar Chart or Bar Graph
  • Upper and Lower Sum or Riemann Sum
  • Parabola
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