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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