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 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?
ADrivers who equip their vehicles with radar detectors are less likely to be ticketed for exceeding the speed limit than are drivers who do not. 分析A选项
BDrivers who are ticketed for exceeding the speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed. 分析B选项
CThe number of vehicles that were ticketed for exceeding the speed limit was greater than the number of vehicles that were equipped with radar detectors. 分析C选项
DMany of the vehicles that were ticketed for exceeding the speed limit were ticketed more than once in the time period covered by the report. 分析D选项
EDrivers on Maryland highways exceeded the speed limit more often than did drivers on other state highways not covered in the report. 分析E选项
assumption的神器是negation method,就是把选项取否定,然后看该选项是否weaken题干。
(assumption的作用,有了他,逻辑完整些,没了他,逻辑就完蛋)
对B用 negation method:
Drivers who are ticketed for exceeding the speed limit are NOT more likely to exceed the speed limit regularly than are drivers who are not ticketed.
这题同理:
结论:drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.
前提已经说了“33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them”,也就是把“drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit than are drivers who do not”给说了。那还剩什么?剩“regularly”呗。选项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.
这题完全不用推理,仔细读题而已。
这题同理:
结论:drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.
前提已经说了“33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them”,也就是把“drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit than are drivers who do not”给说了。那还剩什么?剩“regularly”呗。选项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.
这题完全不用推理,仔细读题而已。