A recent report determined that although only 3 percent of drivers on Maryland highways equipped their vehicles with radar detectors, 33 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.(答案) (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)
(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.(答案)
(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)
文章是说：“在Maryland上，3%装了雷达，33%因超速罚款的装了雷达。所以，装雷达更容易超速”
A说，“装了雷达就不容易因超速而罚款”
解释中说，“while this statement about being ticketed maybe true, the conclusion pertain to the recurrent exceeding of the speed limit, so this statement is not relevant ”我不明白为什么答案的解释可以是“这个结论是关于一再的超速，所以无关”我没看到A在说一再超速的问题啊？？怎么就无关了呢？？完全晕了……
C说，“因超速而罚款的人数 > 装雷达的人数”
解释中说," from the original passage it is already known that 67%of all ticketed vehicles did not have radar detectors. This statement is about the number of vehicles ticketed, not about the regular habits of drivers, so it is not assumed for the conclusion."我不明白的是,解释中提到67%被罚款的没装雷达,有什么意义??因为选项只是说罚款人数与装雷达人数的关系,并没提到罚款里的人有多少是装了或没装雷达的.我不明白这句解释是想说明什么?
我的理解肯定是不到位的，望ＮＮ指点！！
A 说的是有detector的司机不容易被抓到,这个无法成为assumption,因为facts是有detector的司机被抓占三成,
assumption做为前提存在,是要与结论相关的,因为有detector的司机以为不会被抓,所以经常超速,导致了最终的结论
C 只是说被抓到的车比被抓且里面装了detector的车多,就是og提到67%的原因，这个实际上是废话
还是不懂……
文章是说：“在Maryland上，3%装了雷达，33%因超速罚款的装了雷达。所以，装雷达更容易超速”
A说，“装了雷达就不容易因超速而罚款”
解释中说，“while this statement about being ticketed maybe true, the conclusion pertain to the recurrent exceeding of the speed limit, so this statement is not relevant ”我不明白为什么答案的解释可以是“这个结论是关于一再的超速，所以无关”我没看到A在说一再超速的问题啊？？怎么就无关了呢？？完全晕了……
C说，“因超速而罚款的人数 > 装雷达的人数”
解释中说," from the original passage it is already known that 67%of all ticketed vehicles did not have radar detectors. This statement is about the number of vehicles ticketed, not about the regular habits of drivers, so it is not assumed for the conclusion."我不明白的是,解释中提到67%被罚款的没装雷达,有什么意义??因为选项只是说罚款人数与装雷达人数的关系,并没提到罚款里的人有多少是装了或没装雷达的.我不明白这句解释是想说明什么?
多谢!!!(也感谢楼上二位的回答!)
NN们那~~
你要明白ticket for exceeding speed limit跟exceed speed limit是不同的概念，前者是被罚款，后者是超速，被罚款一定是因为超速；而超速不一定被罚款。
谢谢!
可是C的解释中的67%又该怎么去理解呢?
这是一道好题啊！它好的地方在于给了本人一个深刻的教训！！！
什么教训：认真读题目，认真读选项。
请问题目给出了什么信息：从数字的对比来看，装了雷达比没有雷达的更容易超速，对吧！
题目给了什么结论： 装了雷达的比没有雷达的更容易经常超速！对不对？
中间缺的信息，正是需要Assumption的内容啊！那就是只要超速就是经常超速。只有这样，才能得出结论啊！答案一目了然：必须与Regularly有关的选项才行：B！
一个Regularly，唤起了多少人的噩梦！可以说，这道题就考这一个词！
对于A和C的解释的解释：
A：OG的解释没有问题：无关选项
C：我也没有看出来到底OG非要说67%有啥意思，反正超速的车数和装雷达的车数根本就不是一个层面上的东西。这两个数的对比和conclusion（regularly！）无关！当然如果您非要多想，您也会发现这两个数谁大谁小根本没有关系！当然，如果真的C成立的话，这个地方的交通也实在是危险了些！（这个您慢慢想）
以上纯属个人分析，欢迎指正！
本人在另一贴中的回答，欢迎参考：
To guomd：
从文中前半部分可以推出：装了雷达的车比没装的更容易超速。（注意只有Vehicles，也就是说是车的绝对数量，不计罚款次数）
文中结论：装了雷达的车比没有装的更容易经常超速。（注意，此处涉及到了超速的频率，也就是被罚款次数）
这是两个明显不一致的结论。那么这连个结论在时候对等呢？只有在一个假设的情况下：超速者一般来说都是经常超速的人。只有这样才行。
逻辑图：
雷达+超速〉没有雷达+超速 （两个概念的组合）
=〉雷达+Reguly超速〉没有雷达+Reguly超速
需要前提：超速和Reguly是捆绑概念，也就是说只要超速，就是Reguly。
| 欢迎光临 ChaseDream (https://forum.chasedream.com/) | Powered by Discuz! X3.3 |