抱歉，引用一下H大的文章 小弟也是最近在准备PP的CR，刚好遇到这一题 以下是小弟的拙见，提出来给大家讨论，希望版众不吝指教 ※ 引述《hatepig (hatepig终究会happy)》之铭言： 74. (29534-!-item-!-188;#058&004138) In a certain wildlife park, park rangers are able to track the movements of many rhinoceroses because those animals wear radio collars. When, as often happens, a collar slips off, it is put back on. Putting a collar on a rhinoceros involves immobilizing the animal by shooting it with a tranquilizer dart. Female rhinoceroses that have been frequently recollared have significantly lower fertility rates than uncollared females. Probably, therefore, some substance in the tranquilizer inhibits fertility. In evaluating the argument, it would be most useful to determine which of the following? 题：因为r动物的RC很容易脱落，为了重新把RC放到动物身上，工作人员必须使用TD来 使r动物固定。而常脱落RC的雌性r动物，生育率比那些不常脱落RC的雌性r动物低。推 论TD中有物质会阻碍雌性r动物的生育能力。 A. Whether there are more collared female rhinoceroses than uncollared female rhinoceroses in the park 与数量无关 B. How the tranquilizer that is used for immobilizing rhinoceroses differs, if at all, from tranquilizers used in working with other large mammals 与其他动物做比较，超出范围 C. How often park rangers need to use tranquilizer darts to immobilize rhinoceroses for reasons other than attaching radio collars 如果工作人员使用TD，除了因为重新上RC，另外还常因为其他因素而使用，那麽这种计 算重新上RC的次数来判断雌性的r动物的生育率的能力就可能不准确。 D. Whether male rhinoceroses in the wildlife park lose their collars any more often than the park’s female rhinoceroses do 与雄性无关 E. Whether radio collars are the only practical means that park rangers have for tracking the movements of rhinoceroses in the park 与追踪动物的使用方法无关 --

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