下面为大家整理的是GWD套题中逻辑题目的筛选，正在进行中期备考的考生，或者已经用GWD做过测试的同学都可以用这些题目来测试一下。
Certain genetically modified strains of maize produce a natural insecticide that protects against maize-eating insects. The insecticide occurs throughout the plant, including its pollen. Maize pollen is dispersed by the wind and often blows onto milkweed plants that grow near maize fields. Caterpillars of monarch butterflies feed exclusively on milkweed leaves. When, in experiments, these caterpillars were fed milkweed leaves dusted with pollen from modified maize plants, they died. Therefore, use of the modified maize inadvertently imperils monarch butterflies.
一种基因种植的玉米会自然产生一种防虫体，这种防虫体遍布玉米的上下，包括其花粉。玉米的花粉因被风吹送,所以经常会落在通常种在玉米边上的MILKWEED上。一种蝴蝶的毛毛虫主要吃MILKWEED的叶子。在实验中发现，当这些毛毛虫吃了有那种玉米花粉的叶子就会死。所以，种这种玉米就会有之前没想到的危害这种蝴蝶的后果。 (翻译得好象怪怪的，不好意思，凑合着看吧)
Which of the following, if true, most seriously weakens the argument? (找一个理由来支持种这个玉米对这个蝴蝶无害)
Per unit of volume, the natural insecticide produced by the genetically modified maize plants is less toxic to insects than are many commercial insecticides commonly used on maize plants.第一，即使没有其它的杀虫剂厉害，但是也足够杀死毛毛虫了。第二，毛毛虫不是在玉米身上，是在玉米边的MILKWEED上。两个理由支持这个选项为无关选项。
Standard weed-control practices that have been used by farmers for decades have largely eliminated milkweed plants from certain areas where monarch-butterfly caterpillars were once common. MILKWEED多不多不关紧要，题目中是说如果玉米边上有MILKWEED的话，那么它上面的毛毛虫就可能被毒死。要的答案是说毛毛虫不会被毒死。明显这个选项无关。
The experiments showed that the caterpillars were not harmed by contact with the pollen from the genetically modified plants unless they ingested it.说了半天就是因为毛毛虫会吃那个叶子，而那个叶子上有花粉。如果它不吃那整个前提都变了。这个不止是无关，完全是在改题。
The maize-eating insects that the natural insecticide protects against do not feed on the pollen of the maize plant.吃玉米的害虫不吃花粉可以吃其它的，这个和在milkweed上的毛毛虫没丝毫关系。无关。
Airborne maize pollen tends to collect on the middle leaves of milkweed plants and monarch caterpillars feed only on the plant’s tender upper leaves. 也就是说毛毛虫吃的叶子是不会有花粉的，正确。
Q21: GWD-13-31
By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. However, a very aggressive species of blank ant, the Loma ant, which has recently invaded a certain region, has a venomous sting that is often fatal to humans. Therefore, the planned introduction into that region of ant flies, which prey on Loma ants, would benefit public health.
因为和老鼠呀，兔子什么的抢粮食，黑蚁可以帮助控制锯齿类动物的数量(这些动物的数量如果不控制会对人类的公众健康造成威胁)。但是一种叫L的攻击性很强的黑蚁却可能让人致命。这种L黑蚁已经入侵了一些地区。所以，计划在有蚂蚁的地区开始使用的一种杀蚁昆虫对公众健康是有益处的。
Which of the following, if true, most strengthens the argument?
A. Ant flies do not attack black ants other than Loma ants.因为不是所有蚂蚁都该灭，相反的，除了L以外的黑蚁是应该保留下来以控制老鼠什么的数量的。这个选项说明只有L会被杀蚁昆虫灭掉，而其它的是安全的。正确。
Loma ants are less effective than many bird species in competing with rodents for seeds.这个只是给个理由说L更没有保留价值，但是对于为什么用杀蚁昆虫对公众健康有好处并没有解释。注意，题干中所提到的对公众健康的危害有两个：一个是锯齿类动物，一个是L黑蚁。正确答案应该是照顾到了这两个因素。
Certain other species of black ants are more effective than Loma ants in competing with rodents for seeds.同B。
The sting of Loma ants can also be fatal to rodents.可是更重要的是也可以杀人呀，如果人都被它咬死光了，那老鼠什么的再多再少也没关系了。
The use of pesticides to control Loma ants could have harmful effects on the environment.这不是说对公众健康不好吗?我们要的答案是说对这个措施对公众健康是好的，明显是错误答案。
Q22:
Denoma, a major consumer-electronics maker, had a sizeable decline in sales revenue for its most recent fiscal year. This result appears surprising, because electronics retailers report that although their overall sales were considerably lower than in the previous year, their sales revenue from Denoma models actually grew, largely thanks to some innovative and popular models that Denoma introduced.
Which of the following, if true, does most to explain the apparently surprising result? D是一家生产家用电器的公司，它在最近的财务年度(去年)里的的销售额暴跌。这个结果是让人吃惊的，因为据电器零售商的资料，尽管去年的(零售)总的来说是比前年低很多，但是因为销售D公司的产品销售额却有增长，其原因在于D公司产品的创新性和消费者喜欢D公司的产品。
Because of the need to educate the public about its new models’ capabilities, Denoma’s advertising spending was higher than normal over the period.成本是和利润有关系，但是和销售额没有直接关系。题目里的两个相反现象是：一方面D公司的销售额比以前低了很多;另一方面，零售商比以前卖了更多D公司的产品出去;
For the period at issue, Denoma’s major competitors reported declines in revenue that were, in percentage terms, greater than Denoma’s.题目中是D公司自己和自己的不同期比，没和其它公司比。所以和其它公司的差别解释不了题干中的两个矛盾的现象。
A significant proportion of Denoma’s revenue comes from making components for other consumer-electronics manufacturers.因为整个零售市场的销售是下降了，而D公司的主要销售不是直接向零售商销售自己的产品，而是销售给其它电器公司配件。如果其它公司的销售低了，显然其它公司买D的配件也少了。解释了两个现象，正确。
Unlike some of its major competitors, Denoma has no lines of business outside consumer electronics to provide revenue when retail sales of consumer electronics are weak.没有解释题干中的两个矛盾现象，无关。
During the period, consumer-electronics retailers sold remaining units of Denoma’s superseded models at prices that were deeply discounted from those models’ original prices.这个可以解释零售商的销售额上升，但是却没法解释D公司的销售额下降，也就是说矛盾的两个方面只涉及了一个方面，所以无关。
Q29:
The Earth’s rivers constantly carry dissolved salts into its oceans. Clearly, therefore, by taking the resulting increase in salt levels in the oceans over the past hundred years and then determining how many centuries of such increases it would have taken the oceans to reach current salt levels from a hypothetical initial salt-free state, the maximum age of the Earth’s oceans can be accurately estimated.
地球上的河流不间断的往海里输送着溶解了的盐份。所以，只要知道过去一百年里海水里增加的盐含量，我们就可以需要多少世纪海水就可以从无盐状态变得现在这样咸，那样地球上海洋的最大存在时间也可能被准确的推算出。
Which of the following is an assumption on which the argument depends? 找一个理由来支持海洋的年龄可能被推算出。
The quantities of dissolved salts deposited by rivers in the Earth’s oceans have not been unusually large during the past hundred years.过去一百年中河水的溶解了的盐含量不是特别的高。如果是特别高的话，直接结果就是把海洋的年龄算小了。另外一种情况是含盐量比通常时候低，那么这个时候会造成的结果就是把海洋的年龄算得比实际大，但结论说了算海洋的最大可能年齡，所以算大不怕，就怕算小。这个选项是保证了不把海洋年龄算小，所以正确。
At any given time, all the Earth’s rivers have about the same salt levels.每个河流的含盐量不一样没有关系，因为测量的是进入海水后总的增加的含盐量。
There are salts that leach into the Earth’s oceans directly from the ocean floor.如果海水中的盐水有其它的来源，那么题中所说的前提就受到质疑，因为其它来源的盐份是不是也是定期定量的增加是个未知数。如果是定期定量，那就和结论无冲突，如果是不定量不定期，那么对结论就是削弱。
There is no method superior to that based on salt levels for estimating the maximum age of the Earth’s oceans.有没有其它方式没有关系，现在问题问的是的是这个方法是不是个好方法，而没有问是不是唯一的方法。
None of the salts carried into the Earth’s oceans by rivers are used up by biological activity in the oceans.计算的标准是按海水里增加的含盐量，而不是到达海水前河水的含盐量。
您还可能关注：
