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三角函数我需要的
Author:
李东
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
【案例】2013年安徽高考15题
第八周作业
兩組對邊相等的四邊形
Discover Resources
f(x) and -f(x)
柱體建築師 3
謝爾賓斯三角形
櫻花鉤吻鮭
定積分 (The Definite Integral)
Discover Topics
Vectors 2D (Two-Dimensional)
Cylinder
Natural Numbers
Interest Calculation
Histogram