高中教育高考英语2009年统一考试英语北京卷
题目内容

The underlined sentence in the last paragraph probably means that ______.

2024-07-14

A.the problem is not approached step by step

B.the researches so far have faults in themselves

C.the problem is too difficult for researchers to detect

D.research in this area is not enough to make generalized patterns

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