【題目】用下列礦石冶煉金屬時，排放的廢氣容易引起酸雨的是（ ）

A．輝銅礦（主要成分Cu2S）

B．赤鐵礦（主要成分Fe2O3）

C．磁鐵礦（主要成分Fe3O4）

D．鋁土礦（主要成分Al2O3）

【答案】A

【解析】酸雨主要是由向空氣中排放的過量SO2和氮氧化物造成的，輝銅礦中含有硫元素，冶煉金屬時，排放的廢氣中含有二氧化硫氣體，易引起酸雨．

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