讨论：GWD-29-Q40 mice morphine 老鼠和吗啡

seriousa

1.        GWD-29-Q40

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 drug naltrexone, 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.

这道题目的可能选项是B和E

我选的是E。理由是题目问题的是weaken the support for the predication，也就是说需要weaken evidence。E选项直接weaken了evidence

而B选项似乎是在weaken做着的结论。

不知道这样想对不对？？

ps：is there any difference between "weaken the support for the predication" and "weaken the argument or predication" ?

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[此贴子已经被作者于2009/8/28 22:24:54编辑过]

seriousa

另外我觉得B选项只能说明，Naltrexone和morphine的关系，不能反驳Naltrexone是否toxic to certain type of bacteria。所以应该是个无关项。

求NN

seriousa

DDD