关于Lyme disease的一个题目复盘

ZNYDKY · 发表于 2021-9-16 00:24:19

第一题：评价题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?

Whether populations of the other species on which deer tick larvae feed are found only in areas also inhabited by white-footed mice
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
Whether the infected deer tick population could be controlled by increasing the number of animals that prey on white-footed mice
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
Whether the other species on which deer tick larvae feed harbor any other bacteria that ticks transmit to humans

首先梳理一下：P1：deer会将一种细菌传染给人（人得lyme disease)
P2：deer ticks在幼虫阶段因为feed on白足鼠染上这个细菌，同时呢该幼虫可以feed on其他的物种
C：如果增加其他物种的数量，染上细菌的deer tick会变少

选B，A：和地点无关啦~；C：探究的点在染上细菌的deer tick的数量变化上，不在白足鼠的数量上；DE很明显的无关选项
B选项分析：如果是因为食物不够导致的deer tick的数量受到限制，那么如果我增加其他物种，也不能改变deer tick确实feed on白足鼠的事实；如果食物是充足的，那么在其他物种的数量增加后，同样情况下，deer tick幼虫就更少比率feed on白足鼠，所以染上细菌的deer tick数量就会减少。

但是这里存疑（本人也有疑惑），因为如果食物充足的情况下，我再去增加食物，我怎么能说deer tick 一定会去吃其他物种呢？万一它就喜欢白足鼠呢，再增加其他物种也没用啊【而且这里都说了食物充足，是不是说明数量达到一个稳定的状态？deer tick总数不会变化，在它偏好白足鼠的情况下，削弱结论了诶~】好了，我弄明白了：因为题目中说清楚了“If the population of these other species were increased, more of the larvae would be feeding on uninfected hosts"整个是一个条件！所以说明了偏好了！！！

mansajuka44 · 发表于 2022-11-22 07:37:42

顶楼主！

关于Lyme disease的一个题目复盘

所属分类: GMAT考试

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