| 以下是引用可怜的蛋糕在2006-1-2 12:38:00的发言:蛋糕今天可惨了,为了弄明白一道题,脑子都快成浆糊了。OG10TH  171题,看完了CD上关于这题的所有解释,还是一团糊糊,大家帮帮忙 
 171. 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. B (E) Drivers on Maryland highways exceeded the speed limit more often than did drivers on other state highways not covered in the report. 
 171. The conclusion concerns regularly exceeding the speed limit, but the data derive from isolated occasions when drivers exceed the speed limit and are ticketed. The conclusion thus assumes that these instances provide evidence of regular behavior-that drivers ticketed for exceeding the speed limit are likely to be drivers who regularly exceed it. Choice B states this assumption and is the best answer. 
 Choices A, C, and D provide additional data that might be relevant to the conclusion, but if choice B is assumed, the additional data are unnecessary for drawing the conclusion. The difference that choice E describes between Maryland and other states would simply suggest that  the report’s findings cannot be extrapolated to other states. It does not help in drawing the conclusion. 
 
 蛋糕我看了这一题,自己选的时候能选对,但是我说不出来是什么道理,只是觉得你多读两边,读懂了题目就能凭感觉做出来。有个公式是
 Evidence + Assumption=> Conclusion.用在这题上我觉得是这样的:
 Evidence:讲事实
 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
 Assumption:事实里面隐藏的假设,但是这个假设是没有说出来的。
 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.
 Conclusion:通过事实和假设一起可以得出结论。
  Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not. |