标题: OG 251 急问 [打印本页] 作者: jennifer2003 时间: 2003-12-14 23:21 标题: OG 251 急问 The gyrfalcon, an Arctic bird of prey, has survived a close brush with extinction; its numbers are now five times greater than when the use of DDT was sharply restricted in the early 1970's. . A. extinction; its numbers are now five times greater than B. extinction; its numbers are now five times more than C. extinction, their numbers now fivefold what they were D. extinction, now with fivefold the numbers they had E. extinction, now with numbers five times greater than A这里为什么要用numbers,而不用number,这种情况好像不多见啊！如果有一个选项用了单数，那我肯定要错了
