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 正确答案是b，能理解，但是E为什么不对呢？？盼NN帮忙解答，谢谢谢。作者: jessiecg 时间: 2010-9-15 13:59
我也不懂，我选的D，觉得这道题好绕啊。。。作者: jessiecg 时间: 2010-9-20 17:14
可以看看这个帖子，高人解释的很清楚 http://forum.chasedream.com/GMAT_CR/thread-400810-1-1.html?SearchText=新prep2 100作者: shencangbulu 时间: 2010-9-22 10:45
多谢楼上,关键还是题义啊作者: zhangyunkai5 时间: 2010-9-23 23:28
E是无关选项 题目中没有说到transmit to humans作者: zhangyunkai5 时间: 2010-9-23 23:39
刚才大概看了一下 现在说说的我思路 1文章大意说的是 几个东西的关系 数量之间的相互影响 看选项 A被那个东西居住 舍 B数量被什么限制 有关 留 C数量被什么控制 留 D什么变得怎么怎么的 舍 E什么到人类 舍 比较B/C 结论中说其他种类 并没有说white-footed mice 所以B更直接