In contrast to large steel plants that take iron ore through all the steps needed to produce several different kinds of steel,processing steel scrap into a specialized group of products has enabled small mills to put capital into new technology and remain economically viable.
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Aprocessing steel scrap into a specialized group of products has enabled small mills to put capital into new technology and remain
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Bprocessing steel scrap into a specialized group of products has enabled small mills to put capital into new technology, remaining
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Cthe processing of steel scrap into a specialized group of products has enabled small mills to put capital into new technology, remaining
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Dsmall mills, by processing steel scrap into a specialized group of products, have been able to put capital into new technology and remain
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Esmall mills, by processing steel scrap into a specialized group of products, have been able to put capital into new technology and remained
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正确答案: D