A、首先,大部分驾驶员超速以及事故率下降很小,并不能够表明P郡的这项措施失败了。因为超速可能是由于该限速规则刚刚推出,或者P郡政府对该项新规则宣传力度不够,驾驶员对此并不了解。事故率下降很小,可能是由于P郡正处于多雨雪的季节,道路状况比较差,容易引发交通事故。
B、B郡去年交通事故减少25%,作者并没有给出交通事故的基数。如果该基数很小,那么减少25%并不能够说明B郡的交通变得安全了,例如如果基数只有4,那么减少一起事故就减少了25%。作者没有说明B郡的该项措施是成功的。即使25%说明了B郡的交通确实变得比原来安全了,也未必是由于B郡的道路车道变宽了和路面重铺了。可能是由于B郡去年的气候变化了,例如降水或降雪的天数减少。
C、即使B郡的交通变安全是因为B郡采取的这些措施,P郡效仿后也未必能够起到同样的效果。因为两个郡的交通状况不尽相同。例如P郡的交通路线要比B郡拥有更多的易发生交通事故的危险路段,P郡的气候要比B郡多雨雪等。
19.The following appeared in a letter from the manager of a rock band named Double Rice.
One year ago, tickets for Double Rices concerts in stadiums around the country took, on average, at least 24 hours to sell out, if they sold out at all. But the band has been enjoying a surge in nationwide popularity among 14 to 25 year olds, and the 30,000 tickets for a recent concert in Megalopolis sold out in 12 minutes. Clearly the ticket sales in Megalopolis are a result both of the bands increased popularity and of the advertising campaign run in Megalopolis by the Ad Lib advertising agency. Thus, in order to ensure that the bands success in Megalopolis is repeated across the country, the band should hire Ad Lib to duplicate the Megalopolis ad campaign on a nationwide scale.
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