166. Because of the enormous research and development expenditures required to survive in the electronics industry, an industry marked by rapid innovation and volatile demand, such firms tend to be very large. (A) to survive (B) of firms to survive (C) for surviving (D) for survival (E) for firms’ survival 答案是B，请为这里require是什么成分？谢谢！
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发表于 2004-1-25 13:25:00
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