A recent report determined that although only three percent of drivers on
Maryland highways equipped their vehicles with radar detectors,
thirty-three percent of all vehicles ticketed for exceeding the speed limit
were equipped with them. Clearly, drivers who equip their vehicles with
radar detectors are more likely to exceed the speed limit regularly than
are drivers who do not.
The conclusion drawn above depends on which of the following assumptions?
(A) Drivers who equip their vehicles with radar detectors are less likely
to be ticketed for exceeding the speed limit than are drivers who do not.
(B) Drivers who are ticketed for exceeding the speed limit are more likely
to exceed the speed limit regularly than are drivers who are not ticketed.
(C) The number of vehicles that were ticketed for exceeding the speed limit
was greater than the number of vehicles that were equipped with radar
detectors.
(D) Many of the vehicles that were ticketed for exceeding the speed limit
were ticketed more than once in the time period covered by the report.
(E) Drivers on Maryland highways exceeded the speed limit more often than
did drivers on other state highways not covered in the report.
答案是B 这题我不会选
还有一道是
Some airlines allegedly reduce fares on certain routes to a level at which
they lose money, in order to drive competitors off those routes. However,
this method of eliminating competition cannot be profitable in the long
run. Once an airline successfully implements this method, any attempt to
recoup the earlier losses by charging high fares on that route for an
extended period would only provide competitors with a better opportunity to
undercut the airline's fares.
Which of the following, if true, most seriously weakens the argument?
(A) In some countries it is not illegal for a company to drive away
competitors by selling a product below cost.
(B) Airline executives generally believe that a company that once
underpriced its fares to drive away competitors is very likely to do so
again if new competitors emerge.
(C) As part of promotions designed to attract new customers, airlines
sometimes reduce their ticket prices to below an economically sustainable
level.
(D) On deciding to stop serving particular routes, most airlines shift
resources to other routes rather than reduce the size of their operations.
(E) When airlines dramatically reduce their fares on a particular route,
the total number of air passengers on that route increases greatly.
答案是B
我觉得是D。。。
谢谢！：）
呵呵，弱答一个
第一道在FF135里出现过，是一道演绎类逻辑题中的假设题。题目中说3%的MH的人在他们的车上装了雷达，而在超速被开罚单的人里，33%的人装有雷达，所以，装雷达的人比不装雷达的人容易超速
比较简单的是排除法：
(A) Drivers who equip their vehicles with radar detectors are less likely
to be ticketed for exceeding the speed limit than are drivers who do not.与原文所给事实相反
(B) Drivers who are ticketed for exceeding the speed limit are more likely
to exceed the speed limit regularly than are drivers who are not ticketed.
(C) The number of vehicles that were ticketed for exceeding the speed limit
was greater than the number of vehicles that were equipped with radar
detectors.首先数量问题不是文章考虑的重点对象，其次３３％装了雷达的车辆被开了超速的发单，怎么反而数量少了呢？
(D) Many of the vehicles that were ticketed for exceeding the speed limit
were ticketed more than once in the time period covered by the report.是不是多次被罚跟题目成立与否无关
(E) Drivers on Maryland highways exceeded the speed limit more often than
did drivers on other state highways not covered in the report.跟其他州的比较完全属于无故牵扯集合外范围，没的可比
B选项可以理解成假设题里最常见的架桥型,前提是装雷达,结论是超速,由ticketed for exceeding the speed limit连接,正好是B的答案,就是绕了点.
顺便想问一下LZ,PREP版的逻辑在哪能下到啊,我怎么没有看到过呢?
第二道题，削弱题，前提结论结构，反对结论 However,
this method of eliminating competition cannot be profitable in the long
run.
而 (B) Airline executives generally believe that a company that once
underpriced its fares to drive away competitors is very likely to do so
again if new competitors emerge.表明了这个公司将来仍然会采用类似的方式抢夺市场，和结论相反
D选项中的 rather than reduce the size of their operations,是文章中完全没有提到过的，而且Ｄ也不能构成他因削弱．
第一道题，我个人理解，可以看出这种前提，假设出题的一个规律，
这道题目有三层意思：
1，3%的驾驶员在高速公路上带RD
2. 在被开罚单超速的人其中有33%是带RD的
3. 所以得出结论： 带RD的人在高速比一般的驾驶员更容易超速。
然后问最后这个结论的前提和假设，
这和其他假设、结论其实是一样的，需要一个BRIDGE，
我们知道带RD的人容易被开超速的罚单，那我们如何可以得出这种现象和一般驾驶员更容易超速的这个结论。
那就需要补充一个条件，被开超速罚单的人比一般的驾驶员更容易超速。得出结论！
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