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chen mingchuan
GeoGebra
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龙形曲线-分形龙2
第八周作业3
平行線的判定
盈利與虧蝕
百分數及其應用
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亂數取值 by java
圓周公式應用題1
moon
碎形
对角线互相垂直的四边形,证倍分关系的副本
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Rhombus
Ratios
Integers
Standard Deviation
Numbers