单项选择题

在非对称密钥算法中，加密、解密共需要几个密钥？ A.
1 B.
2 C.
3 D.
4

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With a history of more than 1,000 years, hot pot is one of the traditional Chinese diets，which seems to have originated in which place？A.JilinB.MongoliaC.ShaanxiD.Xinjiang

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