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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) Drivers on Maryland highways exceeded the speed limit more often than did drivers on other state highways not covered in the report.
(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) Drivers on Maryland highways exceeded the speed limit more often than did drivers on other state highways not covered in the report.
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！！
[此贴子已经被作者于2008-3-7 18:08:18编辑过] | 
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发表于 2008-3-2 23:01:00
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