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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.
(E) Drivers on Maryland highways exceeded the speed limit more often than
did drivers on other state highways not covered in the report.
答案是B 这题我不会选 还有一道是 Some airlines allegedly reduce fares on certain routes to a level at which
they lose money, in order to drive competitors off those routes. However,
this method of eliminating competition cannot be profitable in the long
run. Once an airline successfully implements this method, any attempt to
recoup the earlier losses by charging high fares on that route for an
extended period would only provide competitors with a better opportunity to
undercut the airline's fares. Which of the following, if true, most seriously weakens the argument? (A) In some countries it is not illegal for a company to drive away
competitors by selling a product below cost.
(B) Airline executives generally believe that a company that once
underpriced its fares to drive away competitors is very likely to do so
again if new competitors emerge.
(C) As part of promotions designed to attract new customers, airlines
sometimes reduce their ticket prices to below an economically sustainable
level.
(D) On deciding to stop serving particular routes, most airlines shift
resources to other routes rather than reduce the size of their operations.
(E) When airlines dramatically reduce their fares on a particular route,
the total number of air passengers on that route increases greatly.
答案是B 我觉得是D。。。 谢谢！：）  | 
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发表于 2008-4-8 16:09:00
