如图所示的装置,在铁圈和银圈的焊接处,用一根棉线将其悬吊在盛水的烧杯中,使之平衡.小心地向烧杯中央滴入CuSO4溶液,片刻后可观察到的现象是A.铁圈和银圈左右摇摆不定B.保持平衡状况C.铁
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![如图所示的装置,在铁圈和银圈的焊接处,用一根棉线将其悬吊在盛水的烧杯中,使之平衡.小心地向烧杯中央滴入CuSO4溶液,片刻后可观察到的现象是A.铁圈和银圈左右摇摆不定B.保持平衡状况C.铁](/uploads/image/z/14771773-37-3.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E7%9A%84%E8%A3%85%E7%BD%AE%2C%E5%9C%A8%E9%93%81%E5%9C%88%E5%92%8C%E9%93%B6%E5%9C%88%E7%9A%84%E7%84%8A%E6%8E%A5%E5%A4%84%2C%E7%94%A8%E4%B8%80%E6%A0%B9%E6%A3%89%E7%BA%BF%E5%B0%86%E5%85%B6%E6%82%AC%E5%90%8A%E5%9C%A8%E7%9B%9B%E6%B0%B4%E7%9A%84%E7%83%A7%E6%9D%AF%E4%B8%AD%2C%E4%BD%BF%E4%B9%8B%E5%B9%B3%E8%A1%A1.%E5%B0%8F%E5%BF%83%E5%9C%B0%E5%90%91%E7%83%A7%E6%9D%AF%E4%B8%AD%E5%A4%AE%E6%BB%B4%E5%85%A5CuSO4%E6%BA%B6%E6%B6%B2%2C%E7%89%87%E5%88%BB%E5%90%8E%E5%8F%AF%E8%A7%82%E5%AF%9F%E5%88%B0%E7%9A%84%E7%8E%B0%E8%B1%A1%E6%98%AFA.%E9%93%81%E5%9C%88%E5%92%8C%E9%93%B6%E5%9C%88%E5%B7%A6%E5%8F%B3%E6%91%87%E6%91%86%E4%B8%8D%E5%AE%9AB.%E4%BF%9D%E6%8C%81%E5%B9%B3%E8%A1%A1%E7%8A%B6%E5%86%B5C.%E9%93%81)
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