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1D科學-第5.1C1章-能量轉換1

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1D科學-第5.1C1章-能量轉換1

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1D科學-第5.1C1章-能量轉換2

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1D科學-第5.1C1章-能量轉換2

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1D科學-第5.1C2a-b章-常見的能量轉換

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1D科學-第5.1C2a-b章-常見的能量轉換

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1D科學-第4.2D4章-嬰兒的誕生

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1D科學-第4.2D4章-嬰兒的誕生

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