GMAT逻辑的知识点这里虽然没有涉及，但是通过一些例题的讲解相信大家会有所了解。GWD逻辑第11套题加上这三道题目就为大家介绍完了。
Q33:
Several of a certain bank’s top executives have recently been purchasing shares in their own bank. This activity has occasioned some surprise, since it is widely believed that the bank, carrying a large number of bad loans, is on the brink of collapse. Since the executives are well placed to know their bank’s true condition, it might seem that their share purchases show that the danger of collapse is exaggerated. However, the available information about the bank’s condition is from reliable and informed sources, and corporate executives do sometimes buy shares in their own company in a calculated attempt to calm worries about their company’s condition. On balance, therefore, it is likely that the executives of the bank are following this example.
一个银行的数个高层最近都买了自己银行的股票。这个举动让很多人吃惊，因为这个银行马上就要破产的消息是广为人知的。但是既然这些高层比一般人更知道这个银行的情况，所以看来破产的这个消息是有些夸大的成分。不过，关于这个银行的消息是来自于可相信的可靠来源，而公司高层有些时候会用购买自己公司的股票来让大家相信公司的状况没有那么糟。综合起来看，这些银行高层也是出于这样的目的而买股票的。
In the argument given, the two boldfaced portions play which of the following roles?
The first describes the circumstance the explanation of which is the issue that the argument addresses; the second states the main conclusion of the argument.
The first describes the circumstance the explanation of which is the issue the argument addresses; the second states a conclusion that is drawn in order to support the main conclusion of the argument.
The first provides evidence to defend the position that the argument seeks to establish against opposing positions; the second states the main conclusion of the argument.
The first provides evidence to support the position that the argument seeks to establish; the second states a conclusion that is drawn in order to support the argument’s main conclusion.
Each provides evidence to support the position that the argument seeks to establish.
Q38:
Outbreaks of Rift Valley fever occur irregularly in East Africa, several years apart. When outbreaks do occur, they kill thousands of cattle. A livestock vaccine against the disease exists but is rarely used. It is too expensive for farmers to use routinely, and since it is not effective until a month after vaccination, administering it after an outbreak begins helps very little. Nevertheless, experts predict that use of the vaccine will increase significantly within the next few years.
叫R的这种病每隔几年就会不定期的在东非爆发。当这种病开始流行时，数千头牛就会病死。虽然已经有了一种针对这种病的牲畜用疫苗，却很少得到使用。原因在于对于农民来说定期的使用这种疫苗费用太高以致于不能承担，而且它在注射后一个月才会开始发挥作用，所以说如果在疫病已经开始流行时使用它就起不了什么作用了。但是专家预测在未来几年内这种疫苗的使用会大幅度增加。
Which of the following, if true, provides the strongest justification for the experts’ prediction? 找一个理由说为什么会有经现在更多的人用这个疫苗。
Rift Valley fever is spread by mosquitoes, but each outbreak is so widespread that it is impractical to control it by using insecticides. 没有说明为什么有更多人会用这个疫苗，最多间接说明了应该用这个疫苗。无关。
When an outbreak of Rift Valley fever occurs, unaffected countries often refuse to import livestock from the countries affected by the outbreak. 只提供了应该用的理由，并没有提供人们会用的理由。
It would take less than a month for producers of the vaccine to adjust their production operations to cope with a large increase in demand.人们不用不是生产期来不及而造成供量不足，而是因为药发生作用是在注射后一个月。现在需要明确的是需求量会上升，上升后有没有足够的供应量与本题无关。
Many cattle farmers in East Africa are nomadic or live in remote villages, and such farmers, who have little access to modern veterinary medicine, are particularly hard hit by outbreaks of Rift Valley fever. 也是提供了应该用而不是会用的理由。
Recently published research has shown that certain identifiable climatic conditions are almost invariably followed, within two to five months, by an outbreak of Rift Valley fever.就是说多久爆发这个病是可以预测的了的，那么提前一个月注射就可以让牲畜不得这个病。正确。
Which of the following most logically completes the argument?
Researchers recently asked dozens of shoppers, chosen at random coming out of a FoodBasket supermarket, what they had purchased. The prices of the very same items at the nearest ShopperKing supermarket were totaled and compared with the FoodBasket total. The ShopperKing totals averaged five percent higher than the FoodBasket totals. Nevertheless, this result does not necessarily show that shoppers at ShopperKing would save money overall by shopping at FoodBasket instead, since ______.
调查研究者随机的抽取了一些从F超级市场走出来的顾客问他们买了些什么。然后同在附近的S超级市场的同样商品的价格进行比较。S商店的价格平均要便宜五个百分点。但是，这个结果并不表示在S商场买东西就可以省钱，因为……
shoppers who shop regularly at a given supermarket generally choose that store for the low prices offered on the items that they purchase most often 顾客会去找最便宜的买。正确。
for shoppers with more than 20 items, the ShopperKing totals averaged more than five percent higher than the FoodBasket totals 对超过购买20件的消费者，S商场的价格就要高五个百分点。可是有可能推出买得没那么多的就到S比较划算。
many shoppers consider factors other than price in choosing the supermarket at which they shop most regularly 现在比较的只是价格，而没有比较其它的。无关。
there is little variation from month to month in the overall quantity of purchases made at supermarkets by a given shopper 同C。
none of the people who conducted the research were employees of the FoodBasket supermarket 这个是保证了实验的客观性，但和结论无关。
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