ChaseDream
搜索
返回列表 发新帖
00:00:00

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?

正确答案: C

相关帖子

更多...

更多相关帖子

524

帖子

15

好友

4712

积分

ChaseDream

注册时间
2003-03-17
精华
8
解析
查看: 2036|回复: 3
打印 上一主题 下一主题

请教天山-7-13

[复制链接]
楼主
发表于 2007-12-3 23:06:00 | 只看该作者

请教天山-7-13

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
沙发
发表于 2007-12-4 09:59:00 | 只看该作者
板凳
发表于 2007-12-5 16:31:00 | 只看该作者
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?
地板
发表于 2009-8-1 22:06:00 | 只看该作者

?

您需要登录后才可以回帖 登录 | 立即注册

Mark一下! 看一下! 顶楼主! 感谢分享! 快速回复:

手机版|ChaseDream|GMT+8, 2024-11-26 19:11
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号

ChaseDream 论坛

© 2003-2023 ChaseDream.com. All Rights Reserved.

返回顶部