标题: 【求解】987上一道题 [打印本页] 作者: 小伊YSY 时间: 2010-8-10 23:00 标题: 【求解】987上一道题 The number of undergraduate degrees in engineering awarded by colleges and universities in the United States increased by more than twice from 1978 to 1985.
(A) increased by more than twice
(B) increased more than two times
(C) more than doubled
(D) was more than doubled（C）
(E) had more than doubled
请问同学们，为什么选c，我选成a了 官方解析看得不是很懂作者: 小伊YSY 时间: 2010-8-10 23:06
如果我把a选项改成 increased by more than two times可以么？作者: yougushizi 时间: 2010-8-10 23:28
不是很确定啊，但是：more than two times这里是不是有歧义？两次？两倍？作者: everine 时间: 2010-8-11 00:09
在manhattan上面看到官方人员的解释：
In the original sentence, "increased by more than twice" is unidiomatic; when numbers increase, they "increase by more than a factor of two." Also, "twice" is an adverb; only nouns can follow the preposition "by."
Answer choice (B) introduces an issue in meaning. When the number of degrees "increased more than two times," that means over the period of 1978 to 1985, it has gone up at least twice: maybe in 1980 and then in 1981. The other times, it has stayed steady or gone down.
In answer choice (D), "was more than" demonstrates a comparison: "The number of pennies was more than the number of nickels." It doesn't make sense for us to say "the number ... was more than doubled": we cannot compare "number" with "doubled" since doubled is not a noun.
The past perfect tense "had more than doubled" in (E) is not justified. The past perfect is used when there is a comparison between one past action with another past action (or past time marker). In this sentence, we're not comparing "the number ... had ... doubled" with any other time reference.
(C) is correct because "doubled" is used correctly in the simple past.
Hope that helps.作者: 小伊YSY 时间: 2010-8-11 00:19
谢谢2位的回答
