今天木有狗狗~不开森~就给大家放个逻辑狗狗的补充哈~

媛子大人

犀牛领子~
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.  utting 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.  robably, 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

媛子大人

答案就是C哈~不过我不大懂诶~~大家讨论一下呗！！

ielaine0828

因为0 0
ABDE都无关
这个和本月考的题干一样选项不同也

因：注射镇静剂
果：犀牛不孕不育
评价：镇静剂是否是唯一因素
方向：1.是否与注射频率有关
2：除了注射以外是不是还有其他因素影响犀牛的生育功能

zenazhong

亲，这是道现象解释文。这道题的逻辑链其实是因为镇定剂中有不孕东东，所以被频繁套领圈，生育率低于不套领圈的。（每次被套领圈要打镇定剂嘛）那就看看是不是有其他原因导致不孕率的差别。也就是否定原因啦。如果答案是No,那就说这个不孕就是recollar导致的，recollars就要打镇定剂，所以不孕就是镇定剂惹的祸。如果回答YES，Uncollared母犀牛也会因别的事情而被注射镇定剂，也可能好大好大量的注射。甚至多余recollars的注射量，可是他们却没有不孕，那么就是说不是镇定剂导致不孕的。亲不知道你明白了木有哦？

媛子大人

亲，这是道现象解释文。这道题的逻辑链其实是因为镇定剂中有不孕东东，所以被频繁套领圈，生育率低于不套领圈的。（每次被套领圈要打镇定剂嘛）那就看看是不是有其他原因导致不孕率的差别。也就是否定原因啦。如果答案是No,那就说这个不孕就是recollar导致的，recollars就要打镇定剂，所以不孕就是镇定剂惹的祸。如果回答YES，Uncollared母犀牛也会因别的事情而被注射镇定剂，也可能好大好大量的注射。甚至多余recollars的注射量，可是他们却没有不孕，那么就是说不是镇定剂导致不孕的。亲不知道你明白了木有哦？

-- by 会员 zenazhong (2012/11/25 19:21:58)

讲得好清楚啊！谢谢！！

juliezxp

谢谢！明白了