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先估算，後看解釋
Author:
Tse Sir
先估算，後看解釋
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兩組對邊相等和有直角的四邊形
第八周作业
sanjiaohanshu
算柱 (兩位數)
柱體建築師
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暗棋的步距
Name the prism 3
Quiz on Angles in a Circle 圓內的角：測驗
對稱(LEVEL 1)
多点联动
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Function Graph
Difference and Slope
Geometric Transformations
Linear Regression
Surface