In the argument given, the two highlighted portions play which of the following roles?答案解析-雷哥GRE

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The traditional color of fire trucks is red, but in cities that have introduced yellow trucks into their fleets, the rate of traffic accidents per mile driven among these trucks has been far lower than the rate among red trucks. Some critics of the innovation have questioned whether this difference should be attributed to color, given that the yellow trucks were generally newer than the red trucks with which they were compared. But this criticism can be dismissed. Certainly, the mere difference in accident rates is not decisive evidence. The decisive fact is that the rates differed significantly only in the hours around dawn and dusk. At these hours, the visibility of yellow is known to be better than that of red.

第1 题

In the argument given, the two highlighted portions play which of the following roles?

(A) The first is a statement of the position the argument as a whole opposes; the second is a statement of the position it defends. (B) The first is a claim that the argument as a whole calls into question; the second denies the rationale presented by some critics of that claim. (C) The first is a claim that the argument as a whole calls into question; the second points out an error of reasoning made by defenders of that claim. (D) The first is the position defended in the argument; the second is an intermediate conclusion drawn to support that position. (E) The first is the position defended in the argument; the second concedes a point to critics of that position.

正确答案： E 耗时：

该题平均耗时：2分30秒，平均正确率：33 %，难度系数：5 。该题由网友lgw20422提供。更多GRE题目请点击上传

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当前版本由 371524c 更新于2020-04-22 16:28:29 感谢由 371524c 对此题目的解答所做出的贡献。

答案：E。高亮句作用题。
第一个句子，“this difference should be attributed to color,”是作者在文中试图defend的观点，最后一句再次说了，在黎明和黄昏几个小时内，黄色的能见度的确更好。第二个句子，“the mere difference in accident rates is not decisive evidence.
”是作者做出的一个让步。因此E是最佳选项。