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化學教室-第5章-6-計算相對原子質量

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化學教室-第5章-4-同位素

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例題示範-第5章-1-從原子序和質量數找次原子粒子數目

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化學教室-第5章-2-元素的分類

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化學教室-第5章-1-原子符號

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S3 地圖閱讀 - 市區與鄉郊

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Biological concepts Ch.1-2(8) - Things to be considered in designing experiment

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Biological concepts Ch.1-2(7) - Experimental setup in Redi's experiment

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