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1987全国文14
Author:
常振虎
GeoGebra
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兩組對邊相等和有直角的四邊形
第八周作业
四邉形 (四年級) 教師版
拼砌四邊形
【案例】2018年全国1卷理科12题
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題四
黎曼和
線、面平行
包絡線
投擲兩枚硬幣的概率
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Stochastic Process or Random Process
Vectors 2D (Two-Dimensional)
Algebra
Indefinite Integral
Constructions