74.
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
答案是C
但是我有點不清楚C和D選項
D不是有可能會是雄性對tranquilizer而不是雌性的關係了
另外C的話我看不太懂為什麼和How often 有關
麻煩大家的解貨了
謝謝
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