[求助]两道机经题目！！紧急求助！！！

雪霁shery

第一道

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

据说是gwd一套题中的题目，可是没有找到，自己也看不懂，大家帮帮我……

第二道

Some people say that the scarcity of food is a function of the finite limits of the earth’s resources, coupled with a relentless rate of population growth. This analysis fails to recognize, however, that much of the world’s agricultural resources are used to feed livestock instead of people. In the United States, for example, almost one-half of the agricultural acreage is devoted to crops fed to livestock. A steer reduces twenty-one pounds of inexpensive grain to one pound of expensive meat. Thus, the scarcity of food is not merely a function of limited resources and population growth.

Which one of the following is an assumption that would allow the conclusion in the argument to be properly drawn?

(A) People prefer eating meat to eating grain.

(B) Meat is twenty-one times more expensive than grain.

(C) The limits of the earth’s agricultural resources are not finite.

(D) More than one-half of the agricultural acreage in the United States is devoted to drops fed to humans.

(E) Growing crops for human consumption on the acreage currently devoted to crops for livestock will yield more food for more people.

说是狒狒逻辑里面的一道原题，答案选的E，可是感觉E是一个削弱，不知如何解释……

请大家帮我看看这两道题目，谢谢咯！！^&^

lukeleng

Some people say that the scarcity of food is a function of the finite limits of the earth’s resources, coupled with a relentless rate of population growth. This analysis fails to recognize, however, that much of the world’s agricultural resources are used to feed livestock instead of people. In the United States, for example, almost one-half of the agricultural acreage is devoted to crops fed to livestock. A steer reduces twenty-one pounds of inexpensive grain to one pound of expensive meat. Thus, the scarcity of food is not merely a function of limited resources and population growth.

Which one of the following is an assumption that would allow the conclusion in the argument to be properly drawn?

(A) People prefer eating meat to eating grain.

(B) Meat is twenty-one times more expensive than grain.

(C) The limits of the earth’s agricultural resources are not finite.

(D) More than one-half of the agricultural acreage in the United States is devoted to drops fed to humans.

(E) Growing crops for human consumption on the acreage currently devoted to crops for livestock will yield more food for more people.

E加强红色的Thus, the scarcity of food is not merely a function of limited resources and population growth.

削弱Some people say that the scarcity of food is a function of the finite limits of the earth’s resources, coupled with a relentless rate of population growth

[此贴子已经被作者于2007-10-9 13:30:07编辑过]

lukeleng

第一道

gwd-29-40

以下是引用罗马青年在2007-8-10 0:51:00的发言：

吃了M的老鼠很容易得败血症，因为它肠子里的细菌对M的反应通常是，跑到血液里去。然而，当老鼠同时吃了M和新药N，败血症减少了。因此，N对这种细菌是有毒的。问WEAKEN。

答案B:他因削弱：WEAKEN：不是直接毒灭细菌，而是因为阻止了细菌跑到血液里去！

[此贴子已经被作者于2007-10-9 13:29:39编辑过]

雪霁shery

太感谢拉^&^

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