返回列表 发帖

GWD13-28

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 from feeding on infected white-footed mice. However, certain other species on which the larvae 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 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 larval stage.

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

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


正确答案选C


我选E
收藏 分享

E 肯定不对,谈论的是导致lyme的细菌,而没有谈论其它细菌。

除了C其它都肯定不对。

C 的意思不太确定,似乎是如果如果这些TICK幼虫时只吸血一次,就降低了被传染的概率。

TOP

问问清楚为什么选C啊?B怎么不对呢?

TOP

我也是選B。我猜B錯的原因是There are no known cases 是不是隱含有

unknown cases?

TOP

返回列表

站长推荐 关闭


美国top10 MBA VIP申请服务

自2003年开始提供 MBA 申请服务以来,保持着90% 以上的成功率,其中Top10 MBA服务成功率更是高达95%


查看