[求助]最新GMAT机考CR 4,6,9---->beautywawa轉移

首先感谢 Anchoret 提供的机考46题

下载地址：http://forum.chasedream.com/dispbbs.asp?boardID=22&ID=12763

RC我有几题很疑惑,想和大家一起讨论.

4. Although exposure to asbestos is the primary cause of mesothelioma, a slow-developing cancer, researchers believe that infection by the SV40 virus is a contributing cause, since in the United States 60 percent of tissue samples from mesotheliomas, but none from healthy tissue, contain SV40. SV40 is a monkey virus; however, in 1960 some polio vaccine was contaminated with the virus.
Researchers hypothesize that this vaccine was the source of the virus found in mesotheliomas decades later.

Which of the following, if true, most strongly supports the researchers’ hypothesis?
A. SV40 is widely used as a research tool in cancer laboratories.
B. Changes in the technique of manufacturing the vaccine now prevent contamination with SV40.
C. Recently discovered samples of the vaccine dating from 1960 still show traces of the virus.
D. In a small percentage of cases of mesothelioma, there is no history of exposure to asbestos.
E. In Finland, where the polio vaccine was never contaminated, samples from mesotheliomas do not contain SV40.

答案是E, 我选了C

8.我想题目的意思是在值域40,000-60,000之间,M城最大;在值域大于60,000中,S城最大.所以B对.

9.我也不明白.

4.逻辑思路是:没有其他的载体存在携带此病毒.C没有说明排它性,只说明了它是携带病毒的.

6.是WEAKEN更多滑雪危险和受伤害更多之间的联系.答案指明了PLASTIC可以用于更多用途说明危险不止来源于滑雪.

9. If you maintain the same base price, you can see the impact that the change in tax brings about.

This is what D is talking about, without this assumption, you cannot possibly mesure the change in sales volume due to the ongoing change in tax.

Hope this helps.

By the way, windweed, I cannot download the Anchoret 机考46题 from the http://forum.chasedream.com/dispbbs.asp?boardID=22&ID=12763

Could you do me favor to email Anchoret 机考46题 to my email. zhaoquangyin[在] yahoo.com

Thanks a lot!

Yes I did. Please let me know if you get it.

Hi windweed ,

I got it, thanks!!!

我记得这题好象有本书上是选了C的.

4. Although exposure to asbestos is the primary cause of mesothelioma, a slow-developing cancer, researchers believe that infection by the SV40 virus is a contributing cause, since in the United States 60 percent of tissue samples from mesotheliomas, but none from healthy tissue, contain SV40. SV40 is a monkey virus; however, in 1960 some polio vaccine was contaminated with the virus.
Researchers hypothesize that this vaccine was the source of the virus found in mesotheliomas decades later.

Which of the following, if true, most strongly supports the researchers’ hypothesis?
A. SV40 is widely used as a research tool in cancer laboratories.
B. Changes in the technique of manufacturing the vaccine now prevent contamination with SV40.
C. Recently discovered samples of the vaccine dating from 1960 still show traces of the virus.
D. In a small percentage of cases of mesothelioma, there is no history of exposure to asbestos.
E. In Finland, where the polio vaccine was never contaminated, samples from mesotheliomas do not contain SV40.

E 为什么对呢? 原文并没有说contaminate SV40就一定cause mesothelionmas, 上文不是说了只有60%吗?   Finland 的例子, 可能是另40%中的一部分啊. 和原文不冲突的.   我还是没明白.

这题我也没明白.

6. In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars. Ten years ago, smooth plastic sleds became popular; they go faster than wooden sleds but are harder to steer and slow. The concern that plastic sleds are more dangerous is clearly borne out by the fact that the number of children injured while sledding was much higher last winter than it was ten years ago.

Which of the following, if true in Verland, most seriously undermines the force of the evidence cited?
A. A few children still use traditional wooden sleds.
B. Very few children wear any kind of protective gear, such as helmets, while sledding.
C. Plastic sleds can be used in a much wider variety of snow conditions than wooden sleds c
D. Most sledding injuries occur when a sled collides with a tree, a rock, or, another sled.

原文给的evidence 说的就是while sledding, C 好象说到别的上面去了. 不一致啊. 我还是想不通.

6.In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars. Ten years ago, smooth plastic sleds became popular; they go faster than wooden sleds but are harder to steer and slow. The concern that plastic sleds are more dangerous is clearly borne out by the fact that the number of children injured while sledding was much higher last winter than it was ten years ago.

那好,看看红色的部分.很清楚指出PLASTIC SLEDS使滑雪更危险.事实上,C中说PLASTIC SLEDS 用于了很多其他方面,这里隐含了一个意思:其他方面也会带来危险.因此众多危险加起来使得今年的危险比去年滑雪的危险总量更多.但这众多的危险中不能说明单单滑雪就比去年多危险.