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    【题目】下列做法，不能起到防锈作用的是（ ）

    A．保留铁器表面的铁锈

    B．在铁器表面镀锌

    C．在金属机械上涂油

    D．在车、船表面刷漆

    【答案】A

    【解析】铁生锈后，因铁锈比较疏松，不能起到防止内部进一步被锈蚀的作用．

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