抱歉，引用一下H大的文章
小弟也是最近在準備PP的CR，剛好遇到這一題
以下是小弟的拙見，提出來給大家討論，希望版眾不吝指教
※ 引述《hatepig (hatepig終究會happy)》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?
題：因為r動物的RC很容易脫落，為了重新把RC放到動物身上，工作人員必須使用TD來
使r動物固定。而常脫落RC的雌性r動物，生育率比那些不常脫落RC的雌性r動物低。推
論TD中有物質會阻礙雌性r動物的生育能力。
A. Whether there are more collared female rhinoceroses than uncollared female
rhinoceroses in the park
與數量無關
B. How the tranquilizer that is used for immobilizing rhinoceroses differs,
if at all, from tranquilizers used in working with other large mammals
與其他動物做比較，超出範圍
C. How often park rangers need to use tranquilizer darts to immobilize
rhinoceroses for reasons other than attaching radio collars
如果工作人員使用TD，除了因為重新上RC，另外還常因為其他因素而使用，那麼這種計
算重新上RC的次數來判斷雌性的r動物的生育率的能力就可能不準確。
D. Whether male rhinoceroses in the wildlife park lose their collars any more
often than the park’s female rhinoceroses do
與雄性無關
E. Whether radio collars are the only practical means that park rangers have
for tracking the movements of rhinoceroses in the park
與追蹤動物的使用方法無關
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