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立方體和平面的截面
Author:
hou yi ting
截出一個圓形吧
GeoGebra
. . . . . . . . 87截不出來
New Resources
異分母分數減法
兩位數除以一位數（一）
拼砌四邊形
第八周作业
【案例】圆柱体内放置一个大球六个小球
Discover Resources
Linear Programming 線性規劃
曲面
congruent activity
corresponding angles
外心
Discover Topics
Integral Calculus
Boxplot
Fractions
Combinatorics
Difference and Slope