题目

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?

选项

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. 

解析

一份最近的报告确定,尽管在马里兰州高速公路上只有3%的司机给自己的车配备了雷达探测器,但在所有因超速而被开罚单的车辆中,有33%都配备了雷达探测器。显然,给自己车辆配备雷达探测器的司机比不配备的司机更有可能经常超速。 **论据**:在马里兰州高速公路上,只有3%的司机车辆配备雷达探测器,但因超速被开罚单的车辆中有33%配备了雷达探测器。 **论点**:配备雷达探测器的司机比不配备的司机更有可能经常超速。 **正确答案方向**:答案需要建立起“因超速被开罚单的车辆情况”与“司机经常超速的可能性”之间的联系,即需要假设被开罚单的司机与经常超速之间存在某种关联。 **选项A**:配备雷达探测器的司机比不配备的司机更不容易因超速而被开罚单。该选项与论点讨论的经常超速的可能性无关,甚至与论据所呈现的配备雷达探测器的车更易收到超速罚单相矛盾,所以不符合要求。 **选项B**:因超速被开罚单的司机比未被开罚单的司机更有可能经常超速。此选项在被开罚单和经常超速之间建立起了联系,使得根据因超速被开罚单车辆中配备雷达探测器的比例高这一论据,能够合理推断出配备雷达探测器的司机更可能经常超速这一论点,符合正确答案方向。 **选项C**:因超速被开罚单的车辆数量大于配备雷达探测器的车辆数量。该选项比较的是两类车辆的数量,与论点中关于司机经常超速的可能性这一核心话题无关,不符合要求。 **选项D**:许多因超速被开罚单的车辆在报告所涵盖的时间段内被开罚单不止一次。即使有些车被开多次罚单,但并不能直接说明配备雷达探测器的司机就更可能经常超速,没有建立起与论点的直接关联,不符合要求。 **选项E**:马里兰州高速公路上的司机比其他未涵盖在报告中的州高速公路上的司机更经常超速。该选项比较的是马里兰州与其他州的司机超速情况,与论点中关于配备雷达探测器和不配备雷达探测器的司机在经常超速可能性上的比较无关,不符合要求。
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