◎ 题干
Firms that use computers have found that the number of staff _____ is needed for quality control can be greatly reduced.
A.whoseB.asC.whatD.that
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Firms that use computers have found that the number of staff _____ is needed for quality control can be greatly reduced. A.whoseB.asC.whatD.that…”主要考查了你对  【限制性定语从句】【非限制性定语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。