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凸透镜成像
Author:
软 微
GeoGebra
New Resources
拼砌四邊形
兩位數加法
兩位數除以一位數（二）
兩位數除以一位數（一）
錐體建築師
Discover Resources
PMC 2014-15 Q2
第一題
橢圓1--四圓心近似法
圓周分層工作紙LV3答案
植树问题
Discover Topics
Logarithmic Functions
Conditional Probability
LCM and GCD
Indefinite Integral
Hypergeometric Distribution