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题目材料：

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.

E显示答案

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以上解析由考满分老师提供。

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