以下是引用tigerlulu74在2005-11-7 23:54:00的发言：Newspaper editorial:In an attempt to reduce the crime rate, the governor is getting tough on criminals and making prison conditions harsher.  art of this effort has been to deny inmates the access they formerly had to college-level courses. However, this action is clearly counter to the governor’s ultimate goal, since after being released form prison, inmates who had taken such courses committed far fewer crimes overall than other inmates.
Which of the following is an assumption on which the argument depends?
Not being able to take college-level courses while in prison is unlikely to deter anyone from a crime that he or she might otherwise have committed.
Former inmates are no more likely to commit crimes than are members of the general population.
The group of inmates who chose to take college-level courses were not already less likely than other inmates to commit crimes after being released.
Taking high school level courses in prison has less effect on an inmate’s subsequent behavior than taking college-level courses does.
The governor’s ultimate goal actually is to gain popularity by convincing people that something effective is being done about crime. 应该选A本文前提：参加课程整体犯罪率比不参加的罪犯要少得多。 结论：政府不让罪犯参加课程 不能减少犯罪率。 取非后使原推理过程必不成立者是假设（支持）。A取非：不参加课程能够阻止任何人犯罪。（那么政府不让罪犯参加课程 必然可以减少犯罪率）取非后，使原推理过程绝对不成立。所以A是假设。支持结论。 C、参加课程的人并不比不参加的人犯罪率低。（注意：not less两个否定。）违反前提（而非削弱前提），怎么可能是支持的假设选项呢？ 且C取非后：参加课程的人比不参加课程的人犯罪率低。（那么政府不让罪犯参加课程 不能减少犯罪率。）取非后，使原推理过程绝对成立，必不为支持（假设）选项。 如果C不成立，那么就是说参加选择参加课程的罪犯可能本来就是那些以后不会再犯罪的人，这样题干里面的结论（参加上课可以降低以后的犯罪率）就不成立了，因为并不是上课导致的参加上课的人以后犯罪率低，而是那些人本来就不倾向于再犯。所以只有C成立，才可以排除这种情况，支持题干中不上课导致再犯率上升的说法。所以答案当然是C。 A是无关选项。 -- by 会员 aztheroe (2006/4/2 3:15:00)
不同意，C中的after being released这个短语很关键，说明了被释放后选择上课的人犯罪的可能性不比不上课的人的低，而不是说上课之前 | 
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发表于 2010-8-20 21:46:41
