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标题: 请各位指教一道逻辑题，谢谢 [打印本页]

作者: rachel121121 时间: 2009-8-2 22:22
标题: 请各位指教一道逻辑题，谢谢
Mice that have been given morphine are
very likely to develop blood poisoning because bacteria that normally
reside in the intestine typically respond to morphine by migrating into
the bloodstream. However, when mice are given both morphine and the new
drugnaltrexone, blood poisoning is much less frequent, although it does
still occur. These results provide support for researchers’ prediction
that naltrexone will turn out to be toxic to certain types of bacteria.

Which of the following, if discovered to be true, would most seriously weaken the support for the researchers’ prediction?

A. After being administered to mice, naltrexone does not pass from the bloodstream into the intestine.

B. Naltrexone inhibits morphine from triggering the migration of intestinal bacteria into the bloodstream.

C. Mice that have been given naltrexone but not morphine have no
greater risk of developing blood poisoning than do mice that have not
been given either substance.

D. The increased risk of blood poisoning is not the only harmful effect on mice of being given morphine.

E. Conditions other than the presence of intestinal bacteria in the bloodstream can cause blood poisoning in mice.

请问e和b 大家都怎么看？我觉得两个都对，请牛人说说e为什么错。谢谢

作者: mingming8152 时间: 2009-8-3 10:20

文章说的结论是：因为轻微的中毒，所以naltrexone可以减少肠内细菌。削弱应该是说在中毒时，naltrexone不能减少肠内细菌。

描述的是naltrexone与肠内细菌的关系。

B说naltrexone阻止了M进入小肠进而进入血液引起中毒

E说除了文中描述的情况外，还有其他情况也可能引发中毒。描述的不是naltrexone与肠内细菌的关系，不能最有效的削弱。

作者: rachel121121 时间: 2009-8-6 20:59

奥，谢谢，那是不是就是说，削弱的越直接越好！

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