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研究了硝硫混酸与银和铜反应中水的作用。结果表明混酸中银的分解及铜的钝化主要由于ＮＯ￣（２＋）离子的氧化作用所致。
The effect of water on nitric-sulfur mixed acid with silver and copper was studied. The results show that the decomposition of silver and the passivation of copper in mixed acid are mainly caused by the oxidation of NO ~ (2+) ions.