251. 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 我仅尊平行要求,发现这题A选项的比较对象不对等,THAN 后面怎么能直接和时间作比较呢,请大家指教~ |