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    【题目】用下列矿石冶炼金属时，排放的废气容易引起酸雨的是（ ）

    A．辉铜矿（主要成分Cu2S）

    B．赤铁矿（主要成分Fe2O3）

    C．磁铁矿（主要成分Fe3O4）

    D．铝土矿（主要成分Al2O3）

    【答案】A

    【解析】酸雨主要是由向空气中排放的过量SO2和氮氧化物造成的，辉铜矿中含有硫元素，冶炼金属时，排放的废气中含有二氧化硫气体，易引起酸雨．

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