取4 根相同的干净的铁钉和 4 支试管,其中两支试管配有软木塞,将铁钉分别放入试管中.(1) (2) ( 3 ) ( 4 )试管(1) :加入雨水,使铁钉的下半部浸在雨水中,上半部接触空气,这是参照
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![取4 根相同的干净的铁钉和 4 支试管,其中两支试管配有软木塞,将铁钉分别放入试管中.(1) (2) ( 3 ) ( 4 )试管(1) :加入雨水,使铁钉的下半部浸在雨水中,上半部接触空气,这是参照](/uploads/image/z/855743-23-3.jpg?t=%E5%8F%964+%E6%A0%B9%E7%9B%B8%E5%90%8C%E7%9A%84%E5%B9%B2%E5%87%80%E7%9A%84%E9%93%81%E9%92%89%E5%92%8C+4+%E6%94%AF%E8%AF%95%E7%AE%A1%2C%E5%85%B6%E4%B8%AD%E4%B8%A4%E6%94%AF%E8%AF%95%E7%AE%A1%E9%85%8D%E6%9C%89%E8%BD%AF%E6%9C%A8%E5%A1%9E%2C%E5%B0%86%E9%93%81%E9%92%89%E5%88%86%E5%88%AB%E6%94%BE%E5%85%A5%E8%AF%95%E7%AE%A1%E4%B8%AD.%EF%BC%881%EF%BC%89+%EF%BC%882%EF%BC%89+%EF%BC%88+3+%EF%BC%89+%EF%BC%88+4+%EF%BC%89%E8%AF%95%E7%AE%A1%EF%BC%881%EF%BC%89+%EF%BC%9A%E5%8A%A0%E5%85%A5%E9%9B%A8%E6%B0%B4%2C%E4%BD%BF%E9%93%81%E9%92%89%E7%9A%84%E4%B8%8B%E5%8D%8A%E9%83%A8%E6%B5%B8%E5%9C%A8%E9%9B%A8%E6%B0%B4%E4%B8%AD%2C%E4%B8%8A%E5%8D%8A%E9%83%A8%E6%8E%A5%E8%A7%A6%E7%A9%BA%E6%B0%94%2C%E8%BF%99%E6%98%AF%E5%8F%82%E7%85%A7)
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