[求助]急求！！！新prep-74

peerlessgmat

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

 

 

马上考了，这题好像是GWD上的题，可是一时找不到了。文章意思是说要评价是否是some substance in the tranquilizer inhibits fertility。C里面说使用的频率,想不通啊

peerlessgmat

哪个好心人给个以前的链接也可以…………万分感谢！！

clarry

i am confused about C&A. i pick C.

C. How often park rangers need to use tranquilizer darts to immobilize rhinoceroses for reasons other than attaching radio collars
--if the the ranges use tranquilizer often, the conclusion is weak.
-- if the rangers use it rarely, the conclusion is justified.

so it's useful to determine whether rangers use t. often.

true?

木木夕云

感觉C的重点不是how often, 而是for reasons other than attaching radio collars

原文假设没collare 的母犀牛体内就没有T，所以生殖能力好

yangyuxiao

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


马上考了，这题好像是GWD上的题，可是一时找不到了。文章意思是说要评价是否是some substance in the tranquilizer inhibits fertility。C里面说使用的频率,想不通啊

-- by 会员 peerlessgmat (2009/10/17 14:14:00)

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?


翻译下：park ranger能够追踪到犀牛的行踪是因为这些犀牛戴着radio collar，但是呢，这个radio collar经常会掉下来，所以就需要经常再把它们给放回去。然而，要想放回这个radio collar,就需要给这些犀牛注射镇定剂。那些经常需要被重新放回radio collar的雌性犀牛跟其他的（没有被安装radio collar）雌性犀牛相比，表现出更低的生育能力。所以，作者得出结论是：镇定剂阻止了生育力。

题目是evaluate,即要紧紧扣住作者的结论来进行。

（这道题最快的解题思路是用排除法，因为其他的四个选项非常好排除，是明显无关的：）

A、 比较未安装radio collar和已安装radio collar的雌性犀牛的数量谁多谁少——没有提到生育力，所以无关
B、 比较犀牛和其他的大型动物关于使用镇定剂的不同——没有提到生育能力，且文中并未出现大型动物，完全无关
D、 比较雄性犀牛和雌性犀牛的radio collar掉落率——没有提到生育能力，且结论并未提到雄性犀牛，无关
E、 radio collar是不是唯一的能够使人们追踪到犀牛的唯一实用方法——跟结论中的镇定剂和生育力之间的关系完全无关

C、翻译：除了给犀牛安装radio collar这个原因之外，park ranger 给犀牛注射镇定剂以致它们失去行动力的频率有多高。
这个选项的意思就是，除了给犀牛安装radio collar这个原因之外，park ranger 还会不会因为别的原因去给犀牛注射镇定剂。如果radio collar是唯一影响镇定剂注入多少的因素的话，那么就可以判断出作者的结论是正确的，因为别的拥有更高生育力的犀牛是没有注射过镇定剂的；但是如果别的犀牛即没有安装radio collar的犀牛还会因为别的原因而被park ranger 注射镇定剂的话，那就不能说明它们拥有更高生育力的原因是因为它们注射了更少的镇定剂。因为没有安装radio collar的犀牛和安装radio collar的犀牛在注射镇定剂的量上没有什么区别，那么生育力就跟镇定剂没有太大的关系。

agnesliu

prep1这题做错了，楼上的解释很细致

peter3008

没有安装radio collar的犀牛和安装radio collar的犀牛 要在生育能力上进行比较,首先要说明他们注射的镇静剂的量是否一样 (比较的2者东西本质是以一样的)

芷萱85

我看到这道题的第一反应是：正确选项是：频繁挣脱radio collar的犀牛是因为她们不能怀孕而郁闷暴躁才弄掉的……一看选项里没有，就用的排除法，c感觉很绕，但是其它4个既不绕又是明显和结论无关

gary1211821

very good explanation !! xie xie

hbhsgxl

题目给出3个对象: collared 犀牛（简称C)，镇定剂（TD），受孕率（FR）。 条件： C跟TD相关，C跟FR相关； 求证TD 跟FR相关。 那么选项肯定得包含ＴＤ。　只有Ｂ和Ｃ选项可选，但是Ｂ项包括other large mamals 题目没提到，排出。 只有选C。