裸机JJ第3题找到GWD原题！

Jennyseer

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.
它只吃一次，那么吃了other species之后，就不会再吃mice，那么other species数量增加之后，吃到mice的概率就降低了。那么the number of ticks acquiring the bacterium 和感染疾病的人 都降低
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
选C

89hang

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.
它只吃一次，那么吃了other species之后，就不会再吃mice，那么other species数量增加之后，吃到mice的概率就降低了。那么the number of ticks acquiring the bacterium 和感染疾病的人 都降低
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
选C

-- by 会员 Jennyseer (2011/7/17 20:10:29)

挥常感谢~~

suntao0209

XIEXIELOUZHU

hellodemi

感谢你！！

anguslu24

感谢~~明天就去啦~~

xiaxiaqin

谢谢！

caijinchen

这道题为什么不是B呢？ 人要是可以直接接触white-footed mice的话，增加其他specious不久没用了吗

kanon8920

这道题为什么不是B呢？ 人要是可以直接接触white-footed mice的话，增加其他specious不久没用了吗

-- by 会员 caijinchen (2011/7/17 21:27:00)

问的是加强，不是削弱。

caijinchen

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

这个不是排除了人直接接触white-footed mice的可能性，不是因该strength了吗

小飞侠Fly

哪位童鞋谁可以翻译一下啊？看得不顺