请教天山-7-13

woklovepp

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

请NN们指教该选哪个

luckyminnie

http://forum.chasedream.com/dispbbs.asp?boardid=24&replyid=743507&id=83632&page=1&skin=0&Star=2

sidong

我用的排除法：

A，说所有的虱子，无关，排除；

B, 说人和老鼠的亲密接触，无关，排除；

C，说鹿虱幼虫只寄生一次，看不出有那里strengthen了，不过先留着；

D, 一种宿主动物可以为各种虱子幼虫供应各式细菌，完全无关，排除；

E，没太拿得准，好像说没有其他寄生了别种细菌的虱子会感染人类，这个和人类得L病好像没关系的说……

——反正看那个也不准确，不过如果我非得蒙一个的话，估计还是选C吧。

切磋。

-----------------------------------

题外话，刚一看还以为是见过的另一道题，也是说人和鹿虱之间Lyme病的传播，而那道题的原因记得是因为“爱好打猎的人多了，所以和鹿接触的多了，所以得Lyme病的也多了。”忘了是哪里的题了，有人有印象吗？

wu41385621

?