37.(32151-!-item-!-188;#058&006653)
The use of radar detectors in commercial vehicles was banned because commercial truck and bus drivers were using these devices to drive faster than the posted speed limit without fear of arrest.Since drivers of noncommercial vehicles also use radar detectors and since speeding decreases safety for any vehicle, use of radar detectors should also be banned in noncommercial vehicles to increase safety.
Which of the following, if true, most strongly supports the argument above?
禁止用RD在C的车上，因为用这些RD让司机超速；超速导致不安全，且非C的车也装RD，所以禁止非C的车装RD会增加安全
(C) The ban on radar detectors in commercial vehicles has been effective in deterring them from speeding.禁止C的车用RD对于减少超速有效
答案C, 说对C有效， 但怎么能推出对非C有效？？
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发表于 2011-4-7 14:21:06
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