Ag放置于空气中,表面常产生一种黑色物质,问这种物质生什么?
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![Ag放置于空气中,表面常产生一种黑色物质,问这种物质生什么?](/uploads/image/z/9919565-53-5.jpg?t=Ag%E6%94%BE%E7%BD%AE%E4%BA%8E%E7%A9%BA%E6%B0%94%E4%B8%AD%2C%E8%A1%A8%E9%9D%A2%E5%B8%B8%E4%BA%A7%E7%94%9F%E4%B8%80%E7%A7%8D%E9%BB%91%E8%89%B2%E7%89%A9%E8%B4%A8%2C%E9%97%AE%E8%BF%99%E7%A7%8D%E7%89%A9%E8%B4%A8%E7%94%9F%E4%BB%80%E4%B9%88%3F)
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