gwd-13-32

rivergirl

偶觉得lawyerGG解释的很清楚, 文章还在说M, 是因为题目中说的是unlike other mice,那么能造M的mice就能show N的提高了. 而C说了能让N提高的方式. 这样理解通嘛?

windflower560

偶得想想.谢谢你,rivergirl.

leslie123456789

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！

leslie123456789

up！

leslie123456789

up

lawyer_1

1。从单纯找答案角度，对原文的理解仅限于M细胞对老鼠的硝酸盐含量有影响便可以。只有C有这层意思

2。C的意思仅限于“对硝酸盐的产生有作用或抑制硝酸盐的减少”，起作用的结果是“维持或升高”（大概念）。也即有两种情况都可以：“维持”，“升高”。原文说的是“升高”的情况（小概念）。原文如果为小概念，那末选项为大概念必然对。比如：原文为leslie123456789GMAT考了800分（小概念），那末选项leslie123456789GMAT考了750分以上（大概念）必然对。

leslie123456789

lawyer的分析果然是一针见血 今天又懂得了一个重要的知识点 大概念小概念

pengpengming

大概念,小概念 呵呵,越听越糊涂,律师说话都这么抽象啊

不知道有多少人犯了和我一样的错误,没选只是因为对C后面那半句话理解错误:

"inhibit a process by which nitrates are broken down or otherwise eliminated"

which指代的是a process,not the former sentence.

wayne8888

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.

B为什么不对啊？

B不是说提高亚硝酸水平可以更容易和细菌感染斗争吗？那不是说明亚硝酸水平高低是抑制细菌的原因吗？

请NN帮忙解释一下。

潜龙勿用

原文中: play a role in the response of the immune system of mice DOES NOT MEAN elevated levels of nitrates can easily fight off most types of bacterial infections.