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Watch Later 4:37

1E_科學_ CH5_作業_ P.44, 46&51_講解

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1E_科學 _CH5.3_能源_書_ P.130-131

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1A_ SCIENCE_CH5_WB_P.44, 46&51_Guide to do

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1A_ SCIENCE_CH5.3_Energy sources_Bk_P.132-133

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1A_ SCIENCE_CH5.3_Energy sources_Bk_P.130-131

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1E_科學_ CH5_作業_ P.43&45_講解

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1E_科學 _CH5.3_能源_書_ P.128-129

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1E_科學 _CH5.3_能源_書_ P.126-127

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