帮我来看看这道题吧~好纠结~

doudouty

近期报道表明，尽管行驶在马里兰高速公路上的车辆只有3%装有雷达监测器，因超速而拿到罚单的车辆中有33%装有雷达监测器。很明显的，给车辆装上雷达监测器的司机比没给车辆装上雷达监测器的司机更常超速。
以上结论基于几下哪一项假设？
A.给车辆装上雷达监测器的司机比没给车辆装上雷达监测器的司机更不可能因超速而拿到罚单
B.因超速而拿到罚单的司机比超速但没拿到罚单的司机更可能超速
C.因超速而拿到罚单的车辆的数量大于装有雷达监测器的车辆的数量
D.很多因超速而拿到罚单的车辆在报道的时间段内拿到罚单超过一次
E.  在马里兰高速公路上行驶的司机比在报道中没提到的其他州的高速公路上行驶的司机更常超速

比较纠结于A和B……哪位大牛帮帮忙吧~~~~

doudouty

一定要弄明白。。要不今晚睡不着了。。。。。

sdcar2010

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 driver 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 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.

Necessary assumption.  Use negation method. B is the answer.  The keyword is regularly.

stevenvboy

站里有个帖子解释得不错：http://forum.chasedream.com/GMAT_CR/thread-276498-1-9.html

doudouty

thank you!