21. Proponents of artificial intelligence say they will be able to make computers that can understand English and other human languages, recognize objects, and reason as an expert does---computers that will be used to diagnose equipment breakdowns, deciding whether to authorize a loan, or other purposes such as these.
(A) as an expert does---computers that will be used to diagnose equipment breakdowns, deciding whether to authorize a loan, or other purposes such as these (B) as an expert does, which may be used for purposes such as diagnosing equipment breakdowns or deciding whether to authorize a loan (C) like an expert---computers that will be used for such purposes as diagnosing equipment breakdowns or deciding whether to authorize a loan (D) like an expert, the use of which would be for purposes like the diagnosis of equipment breakdowns or the decision whether or not a loan should be authorized (E) like an expert, to be used to diagnose equipment breakdowns, deciding whether to authorize a loan or not, or the like
答案:C
我明白句子后的such as 的原则,如果不考虑句子后面的问题,在前面用as an expert does是不是也对?我理解as/like的区别,但是实际做题,经常没有把握.