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Watch Later 8:17

Prepositions of Time 2 - in on at (Part 2)

Watch Later 9:20

Prepositions of Time 1 - in on at (Part 1)

Watch Later 3:57

18-19 F.5 物理 - 光學 2 - 4

Watch Later 3:56

18-19 F.5 物理 - 光學 2 - 3

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18-19 F.5 物理 - 光學 2 - 2

Watch Later 5:05

18-19 F.5 物理 - 光學 2 - 1

Watch Later 2:23

F.2_第9.2C章_三角形的角及演繹幾何示範5(三角形內角和)

Watch Later 3:33

F.2_第9.2B2章_演繹幾何示範4(內錯角相等)

Watch Later 2:16

F.2_第9.2B1章_平行線上的角

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