这是一个国外gmat专家的解释
“hi -
if you say 'on the basis of x', that is usually taken as an acknowledgment that x has actually occurred. so choice a makes it sound as if building large new hospitals successfully avoids duplicating facilities. that's not true, of course: the thrust of the sentence is that the new hospitals are duplicates, and that's the problem.
choice e correctly expresses the idea: the duplication of facilities is something to be avoided. the other message - that the new hospitals are guilty of such duplication - is implicit, but at least it isn't wrongly expressed (as in choice a).”
希望对你有帮助!
-- by 会员 ear2ear (2011/9/22 12:36:07)