用感官观察对水和沙做比较急.过路的.帮帮忙.还有水和食用油
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![用感官观察对水和沙做比较急.过路的.帮帮忙.还有水和食用油](/uploads/image/z/2230533-45-3.jpg?t=%E7%94%A8%E6%84%9F%E5%AE%98%E8%A7%82%E5%AF%9F%E5%AF%B9%E6%B0%B4%E5%92%8C%E6%B2%99%E5%81%9A%E6%AF%94%E8%BE%83%E6%80%A5.%E8%BF%87%E8%B7%AF%E7%9A%84.%E5%B8%AE%E5%B8%AE%E5%BF%99.%E8%BF%98%E6%9C%89%E6%B0%B4%E5%92%8C%E9%A3%9F%E7%94%A8%E6%B2%B9)
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