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四年級探究考察類

        我趁午休的機會,打算好好琢磨一下這個充滿著神奇色彩的問題。我先準備好一些資料:一個筆蓋、一張小紙片,材料就這么簡單。我按照步驟,先將筆蓋用力的往后腦勺一磨,然后向紙一吸,果然吸了起來??梢院瞄L一段時間不掉下來呢!我好奇地一遍一遍反反復復地做了N遍,始終沒有一個結論,    (共 446 字)     [閱讀本文] >>

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