一些逻辑问题的分析

Editor: Articles in Gardening Magazine often spur sales of the plants they describe, particularly among people new to gardening. Accordingly, we will no longer publish articles or accept advertisements praising the beauty of rare wildflowers. Most such plants sold to gardeners have been difficult to propagate under cultivation, so plant sellers often collect them in the wild. Our new policy is part of our efforts to half this yearly plundering of our native plant populations.

Which of the following, if true, casts the most doubt on the wisdom of the magazine's new policy as a way of pursuing the intended effect ?
(A) When people new to gardening buy plants, they often fail to take adequate care of the plants that they buy and become discourged from buying those varieties again.
(B) Plant sellers who sell rare wildflowers have no reasonably inexpensive alternate way to offer their wares directly to new gardens.
(C) The demand for rare wildflowers rarely exceeds the number of such plants that can be collected in the wild by plant sellers.
(D) The propagation of rare wildflowers often depends on the plant's interaction with other organisms in their environment such as plants that create suitable soil conditions or insects and birds that disperse seeds.
(E) Revenues from sales of plants collected in the wild are supporting the discovery of new low-cost techniques enabling rare wildflowers to be readily propagated in nurseries.
编者：刊载在杂志上的文章能刺激那些园艺初学者去买花。杂志不会再刊载宣传稀有野花的文章了，因为大多数的稀有野花是很难人工培育的，所以卖花人要去野外采花。这个不再宣传的目的是为了让我们本土的植物数量不再削减。
削弱。也就是不能让本土植物数量不削减。即便这么作了，还是不行。
A.    园艺初学者，不能好好照顾花，所以很灰心，不会再买花了。——无关
B.    卖稀有野花的卖花人没有更加合理的省钱方式来直接为园艺初学者提供货。
C.    稀有野花的需求数量基本不超过这花在野外能被卖花人菜的数量。也就是能收集到的数量大于稀有野花的需求数量。
D.    野花的繁殖靠这花和别的有机物的共同作用。——无关，
E.    卖野花的钱能支持发现新的低成本技术来让野花人工培育。

如果问加强我觉得是B，如果是削弱我觉得是E，但是我看答案削弱是C。有点儿疑惑。

大侠在此！
我正为逻辑头痛无比中。。真都快撞墙了。。。

LZ可以说下做逻辑的关键是什么吗？（现在一下子没具体的题目）

之前也做了两遍OG，还自己总结了一下
现在做GWD，觉得也题也看不懂，一看题就心慌，不要说想什么reasoning line了。
真是急死了，考试日期也定不下来，这样根本没法考啊。。

lz要是能发个帖总结下逻辑题的迅速判断方法。就好了。
其实前提使我们的阅读都没问题。

楼主真实热心人，辛苦下啦！
GWD1-Q9
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：E
文中说：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.
楼主对这句话是怎么理解得？ in 1960 some polio vaccine was contaminated with the virus是说这种polio vaccine← 被污染了SV40，那么polio vaccine是受的一方，怎么能说polio vaccine是→SV40（这种发现在mesotheliomas的病毒的）来源呢？（这里的the virus found in mesotheliomas decades later是说的是SV40吧？）