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4.2_1_生活科學館

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4.2_1_生活中的科學(一)

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4.2_1_水的探究

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4.2_1_水的功用

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4.2_1_水的三態

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4.1_4_放眼世界

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4.1_3_思想文化的傳承

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4.1_3_中華民族面面觀

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