Verbal 题目求助

zingshaw

According to a study by the Carnegie Foundation for the Advancement of Teaching, companies in the United States are providing job training and general education for nearly eight million people, about equivalent to the enrollment of the nation’s four-year colleges and universities.
(A) equivalent to the enrollment of
(B) the equivalent of those enrolled in
(C) equal to those who are enrolled in
(D) as many as the enrollment of
(E) as many as are enrolled in

答案是E， 不过E中的“ are enrolled in ‘ 怎么理解，什么 are rolled in ? 新手求助啊

brfmzbjz

as many (people) as are enrolled
第二个as 作为关系代词引导定语从句
充当主语 指代people

zingshaw

brfmzbjz 发表于 2014-7-28 08:23
as many (people) as are enrolled
第二个as 作为关系代词引导定语从句
充当主语 指代people ...

嗯？我知道as 可以引导定语从句，可是这个as many as 不应该是一个固定的用法吗。 My books are as many as yours. 那请问一下这个句子中的as 做什么词理解呢。

brfmzbjz

zingshaw 发表于 2014-7-28 10:09
嗯？我知道as 可以引导定语从句，可是这个as many as 不应该是一个固定的用法吗。 My books are as many  ...

这里没有引导句子
就只是介词而已