The underlined sentence in th…——2009 高考英语第 66 题答案解析

2009_北京 Paper

2009 Beijing Question 66 Single-choice Differentiating

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

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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【答案】D

✅ 来源：2009年 · 北京 · 2009_北京卷 · 第 66 题 · 本题已通过全部自动发布校验

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difficulty

Differentiating