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P5_MATH
GeoGebra
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百分數及其應用
第八周作业2
撒针估算面积实验
中华人民共和国国旗
常见四边形是否是双心四边形
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指對數函數交點_1
牛頓定理一
吱吱喳喳
奠基1
四色地图
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Probability
Sphere
Prism
Statistical Characteristics
Linear Equations