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【单选题】
下列判断正确的是（ ） ①维生素C具有还原性，在人体内起抗氧化作用 ②NO 2 溶于发生氧化还原反应 ③1 mol Cl 2 参加反应转移电子数一定为2N A ④阴离子都只有还原性A.
①②
B.
②③
C.
③④
D.
①④
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