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好气啊！宝宝在洗葡萄，却一直洗不干净，怎么办呢？
葡萄皮上有白霜，于是猫小帅洗葡萄洗了好久，不仅如此，洗干净的葡萄还会长出白霜。葡萄上的白霜到底是怎么产生的呢？一起来看看这个科普故事《洗不干净的葡萄》吧~更多儿童科普故事，欢迎关注猫小帅
猫小帅十万个为什么45/100
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