Prep难题讨论

zljadress

Lyme
disease is caused by a bacterium transmitted to humans by deer ticks.  Generally, deer ticks pick up the bacterium
while in the larval stage by feeding on infected white-footed mice.  However, certain other species on which the
larvae feed do not harbor the bacterium. 
If the population of these other species were increased, more of the larvae
would be feeding on uninfected hosts, so the number of ticks acquiring the
bacterium would likely decline.

    

Which
of the following would it be most important to ascertain in evaluating the
argument?

    

A.
Whether populations of the other species on which deer tick larvae feed are
found only in areas also inhabited by white-footed mice

    

B.
Whether the size of the deer tick population is currently limited by the
availability of animals for the tick's larval stage to feed on

    

C.
Whether the infected deer tick population could be controlled by increasing the
number of animals that prey on white-footed mice

    

D.
Whether deer ticks that were not infected as larvae can become infected as
adults by feeding on deer on which infected deer ticks have fed

    

E.
Whether the other species on which deer tick larvae feed harbor any other
bacteria that ticks transmit to humans

答案选B，我选C，但是这道题本身看不太懂，能不能帮忙翻译一下？

kevinli120

Lyme disease is caused by a bacterium transmitted to humans by deer ticks(背景，次要).  Generally, deer ticks pick up the bacterium while in the larval stage by feeding on infected white-footed mice. （ DT得细菌通过幼虫时期吃WFM）However, certain other species on which the larvae feed do not harbor the bacterium.（DT虫吃的其他物种都不会携带这种病毒）  If the population of these other species were increased, more of the larvae would be feeding on uninfected hosts, so the number of ticks acquiring the bacterium would likely decline.（如果其他DT的物种数量增加了，更多幼虫就会吃这些不带病菌的物种，所以DT过吃WFM获得疾病的数量就会减少）

Which of the following would it be most important to ascertain in evaluating the argument?

评价题 

B. Whether the size of the deer tick population is currently limited by the availability of animals for the tick's larval stage to feed on（是否DT数量会被DT幼虫时期的时候能够吃到的动物多少所限制）回答yes，加强原文，因为吃别的动物了就不吃WFM了，回答no，就是说就算有很多other species可以吃，多到可以不吃WFM，DT还是会得病，所以削弱原文，与回答yes时候相反，正确。

个人意见，仅供参考，希望对你有用

kevin