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Watch Later 2:42

2016-17 4B 數學-P.4.28 Q30

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2016-17 4B 數學-P.4.28 Q29

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2016-17 4B 數學-P.4.25 Q18

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F1 Ch4 三角形內角和2

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F1 Ch4 三角形內角和1

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2016-17 4B 數學-P.3.55 Q18,19

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2016-17 4B 數學-P.3.55 Q15

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2016-17 4B 數學-P.3.36 Q13

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2016-17 4B 數學-P.3.37 Q17

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