[问答] 分享一道manhattan的逻辑题，感觉比较搞…… [复制链接]

小硕鼠
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发表于 2013-8-23 21:50:20 |显示全部楼层

答案贴二楼了
这，难道是我逻辑有问题么= =看了解析瞬间跪了……
Last year, after the number of subway riders who had had their pockets picked at Central Station had risen to an all-time high, the transit authority erected signs in Central Station telling riders to beware of pickpockets. In the year since the signs have been erected, though, riders have had their pockets picked at Central Station at a per-capita rate nearly double that before the signs were erected.
Which of the following, if true, helps to explain the discrepancy pointed out in the passage?

Since Central Station’s major renovation, during which the signs were erected, Central Station has become much more attractive to tourists from out of town.

Rising gas prices and a surging downtown job market have caused the daily number of riders at Central Station nearly to double within the past year.

Riders walking past the new signs tend to rummage through their pockets or feel through their clothes to verify the presence of their possessions.

The number of individuals convicted of petty theft or grand theft for picking pockets at Central Station has decreased within the past year.

Most of the pickpockets’ victims were riding the subway during peak travel hours, when Central Station is especially crowded.

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小硕鼠
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发表于 2013-8-23 21:50:39 |显示全部楼层

(A) The riders’ city of origin is irrelevant to the frequency of pickpocketing, unless unwarranted assumptions are made about the vulnerability of out-of-towners to pickpocketing.

(B) A doubling of the number of riders at Central Station would help to explain a sharp rise in the absolute rate at which riders’ pockets are picked, but does not explain a rise in the per-capita theft rate. Although it is possible that the additional crowding induced by the new riders might raise the likelihood of pickpocketing, that inference would require additional assumptions.

(C) CORRECT. If riders walking past the new signs tend to rummage through their pockets or feel through their clothes to verify the presence of their possessions, then lurking pickpockets will be able to locate those possessions by watching the riders’ hands – something which will help them to steal the possessions, and which they were unable to do before the new signs were erected.

(D) In general, but especially because pickpocketing is a crime whose offenders largely go unpunished (because the crime is not discovered until well after the fact), there is no clear relationship between the frequency of pickpocketing and the rate at which offenders are convicted for it.

(E) No connection is made to the massive increase in pickpocketing during the last year, so this consideration is irrelevant.

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