簡單說 tranquilizer若有用到其他用途 也就是用在其他沒有recollar的犀牛上 這些non collr的犀牛 生殖率比collr的高 若用到tranquilizer這些身上 就可以解釋tranquilizer不是造成生育率低的原因 因為tranquilizer也有用到其他生育率高的non collar犀牛 ※ 引述《webelieve (LALA)》之銘言： : 我記得有另外一題是跟這題相同題幹但是問的 方式不同 : 這題的推論應該是這樣 : use tranquilizer darts -> Low fertility : Low ertility 是確定已發生的事實數據 應此可能是另有他因 : 也就是說不一定是 tranquilizer darts造成 low fertility : use tranquilizer and then Recollar -> Low fertility : (很明顯的題幹結論漏掉 recollar這動作 一定有漏洞! ) : 會不會是 recollar這個動作造成 female 身心受創而不孕?! : 所以答案C 的意思是 要證明是 tranquilizer 而不是recollar 造成 Low F : 比如說 : 100隻 注射tranquilizer , 一部分50隻 recollar, 是不是還是100隻不孕 : 如果是50隻 代表是 RECOLLAR 造成 : ※ 引述《pilichat (人生需要不斷冒險)》之銘言： : : 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? : : A. Whether there are more collared female rhinoceroses than uncollared female : : rhinoceroses in the park : : B. How the tranquilizer that is used for immobilizing rhinoceroses differs, : : if at all, from tranquilizers used in working with other large mammals : : C. How often park rangers need to use tranquilizer darts to immobilize : : rhinoceroses for reasons other than attaching radio collars : : D. Whether male rhinoceroses in the wildlife park lose their collars any : : more often than the park’s female rhinoceroses do : : E. Whether radio collars are the only practical means that park rangers : : have for tracking the movements of rhinoceroses in the park : : 刪到最後剩下C : : C也是正確答案 : : 但看不懂因為其他原因而注射麻醉的頻率,和題幹有什麼連結... --

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