gwd-13-32

Q32:

Macrophages are cells that play a role in the response of the immune system of mice and other mammals to invasive organisms such as bacteria.  Unlike other mice, mice that are genetically incapable of making these particular cells do not show elevated levels of nitrates when infected with bacteria.

The statements above, if true, provide the most support for which of the following conclusions?

1. Mice that are unable either to make macrophages or to make them in sufficient numbers will protect themselves from bacterial infections in some other way.
   
2. Mice that show elevated levels of nitrates can easily fight off most types of bacterial infections.
   
3. In mice, macrophages play a role in the production of nitrates or inhibit a process by which nitrates are broken down or otherwise eliminated.
   
4. When a healthy mouse becomes infected with an invasive organism, the number of macrophages in the mouse’s body decreases.
   
5. Injections of nitrates into mice that lack macrophages will not enhance the ability of these animals’ immune systems to fight off infection.

   Answer:

the key is C

原帖子：http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=60259&star=2&page=1

但有一问题不懂

不含Macrophages cells的do not show elevated levels=>维持或下降<=>(不大于=>等于或小于)

=>含Macrophages cells的 升高levels

however, C, In mice, macrophages play a role in the production of nitrates or inhibit a process by which nitrates are broken down or otherwise eliminated.=>升高或维持

矛盾？？！望大家帮忙解答，谢谢谢谢！

C的意思是说：M可以产生N，或是抑制N被分解/消除的过程。没有看出MM指的矛盾在哪？

我想表达的意思是从原文推出含Macrophages cells的 升高levels

但是C却说含Macrophages cells的 升高或维持了，

感觉多了个维持，但是经过lawyer的解释已经明白了

谢谢ringcheng&lawyer