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标题: 求大家帮帮我OG13 CR 的第77题 有个选项一会不明白 [打印本页]
作者: Macklemost 时间: 2016-4-7 19:52
标题: 求大家帮帮我OG13 CR 的第77题 有个选项一会不明白
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.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------请问A 哪里不对呢？ 如果装radar detectors的车更不容易被开罚单，而被开罚单的中却有33%都是装radar的，那不就说明了装radar 的 平时 更爱超速（所以才在不容易被罚、数量少的情况下还占了被罚车辆的很大比例）吗？
作者: emmahiggins09 时间: 2016-4-9 06:46
http://forum.chasedream.com/GMAT_CR/thread-432803-1-1.html
论坛里有讨论过，楼主可以参考一下
作者: Macklemost 时间: 2016-4-9 23:05
我看过啦。。可是我的疑惑帖子里没有讨论到，是我想的太偏了么
作者: emmahiggins09 时间: 2016-4-10 03:20
题干里的结论是：Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.
A 是和题干结论相反的叙述，不会是前提的。前提是要能使j结论的成立的叙述。不知道这样说清楚么
作者: elusive 时间: 2016-4-10 15:04
果因推理
前提（结果）：带有雷达的车在总体中很少，但是在被抓住超速的当中很多。（有雷达更容易被抓）
结论（原因）：有了雷达的车更容易超速。
怎样使”有了雷达的车更容易被抓“成立？
A：有了雷达不会被抓，不能使结果成立。
B：那些经常被抓超速的经常超速。可以使结果“有了雷达的车更容易被抓”成立。
因为有了雷达更容易超速，还因为经常超速的经常被抓，所以有了雷达更容易被抓。
作者: elusive 时间: 2016-4-10 15:05
果因推理
前提（结果）：带有雷达的车在总体中很少，但是在被抓住超速的当中很多。（有雷达更容易被抓）
结论（原因）：有了雷达的车更容易超速。
怎样使”有了雷达的车更容易被抓“成立？
A：有了雷达不会被抓，不能使结果成立。
B：那些经常被抓超速的经常超速。可以使结果“有了雷达的车更容易被抓”成立。
因为有了雷达更容易超速，还因为经常超速的经常被抓，所以有了雷达更容易被抓。
作者: Macklemost 时间: 2016-4-17 15:02
be ticketed（A） 和 exceed speed REGULARLY(题干)不是一个情况呀
作者: Macklemost 时间: 2016-4-17 15:04
be ticketed 和 exceed speed REGULARLY 是两种情况呀，这是OG自己解释的，所以A和题干不是相反的
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