化学式里怎么还有CO(NH2)2 怎么还有括号的啊?而且括号外面还有个小2,
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![化学式里怎么还有CO(NH2)2 怎么还有括号的啊?而且括号外面还有个小2,](/uploads/image/z/6454144-64-4.jpg?t=%E5%8C%96%E5%AD%A6%E5%BC%8F%E9%87%8C%E6%80%8E%E4%B9%88%E8%BF%98%E6%9C%89CO%28NH2%292+%E6%80%8E%E4%B9%88%E8%BF%98%E6%9C%89%E6%8B%AC%E5%8F%B7%E7%9A%84%E5%95%8A%3F%E8%80%8C%E4%B8%94%E6%8B%AC%E5%8F%B7%E5%A4%96%E9%9D%A2%E8%BF%98%E6%9C%89%E4%B8%AA%E5%B0%8F2%2C)
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