国际顶尖MBA申请交流平台--TOPWAY MBA

Lyme disease is caused by a bacterium transmitted to human by deer ticks. Generally deer ticks pick up the bacterium while in the larva stage from feeding on infected white-footed mice. However, certain other species on which the larva feed do not harbor the bacterium. Therefore, if the population of these other species were increased, the number of ticks acquiring the bacterium and hence the number of people contracting Lyme disease would likely decline.

Which of the following, if true, most strengthens the argument?

A. Ticks do not suffer any adverse consequences from carrying the bacterium that causes Lyme disease in the humans.

B. There are no known cases of a human’s contracting Lyme disease through contact with white-footed mice.

C. A deer tick feeds only once while in the larva stage.

D. A single host animal can be the source of bacterium for many tick larva.

E. None of the other species on which deer tick larva feed harbor other bacteria that ticks transmit to humans.

答案选C。为什么咧？

是说人们会感染一种disease是由deer ticks所携带的bacterium造成的。deer ticks在larva时期食用一种infected的rice导致携带这个bacterium.但其他几种larva食用的rice不携带该bacterium.结论是减少infected rice的数量，加大其它几种rice的数量，就可以减少携带bacterium的ticks的数量，从而减少人们染病的机会。

A反而是减弱是说deer ticks携带病菌不会受到负面影响，那它不是更长命百岁吗？

B infected white-footed rice才有问题如果本题改成infected white-footed rice,那反而是加强。因为否定了人们因食用infected white-footed rice而感染disease的可能。

Generally deer ticks pick up the bacterium while in the larval stage from feeding

on infected white-footed mice. However, certain other species on which the larvae

species were increased, the number of ticks acquiring the bacterium and hence the

number of people contracting Lyme disease would likely decline.
L病是通过LT虫传染给人类的一种细菌引起的。大多数情况下LT虫是在幼虫阶段在被感染的白脚

老鼠身上觅食时携带上这种病菌的。然而，其他种类的LT虫在幼虫阶段的觅食的宿主不携带这

种病菌。因此，如果其他种类的LT虫增加了，携带特定病菌的LT虫数量就会减少，进一步的感