相信大家读完这些题目会有所启发，小编还会继续为大家整理更多GWD套题中的逻辑题目，敬请关注。
Q16:
Maize contains the vitamin niacin, but not in a form the body can absorb. Pellagra is a disease that results from niacin deficiency. When maize was introduced into southern Europe from the Americas in the eighteenth century, it quickly became a dietary staple, and many Europeans who came to subsist primarily on maize developed pellagra. Pellagra was virtually unknown at that time in the Americas, however, even among people who subsisted primarily on maize.
玉米含一种维生命N，但是不能被人体直接吸收。P是一种因维N不足而引起的疾病。18世纪，玉米从美州传到南欧之后迅速地成为这个地区的主食，因些很多欧州人得了P这种病。尽管玉米在美州也是主要食物，但是美州人却基本上没有得这种病 的。
Which of the following, if true, most helps to explain the contrasting incidence of pellagra described above?
Once introduced into southern Europe, maize became popular with landowners because of its high yields relative to other cereal crops.这个能说明为什么在欧州变成主食，不能说明为什么美州人吃了不生病，欧州人吃了却生病。
Maize grown in the Americas contained more niacin than maize grown in Europe did.长得再多也不能被人体吸收，多了等于白多。
Traditional ways of preparing maize in the Americas convert maize’s niacin into a nutritionally useful form.做法不一样就是原因，正确。
In southern Europe many of the people who consumed maize also ate niacin-rich foods.那就更不能说明欧州人为什么要得P病，而且完全没有涉及为什么美州人不得P病。
Before the discovery of pellagra’s link with niacin, it was widely believed that the disease was an infection that could be transmitted from person to person.
也就是让你觉得美州人也得了这病，只是他们不晓得。这是属于骗你想太多的答案，坚持相信题干的原则：题目说美州人没得，那他们就是没得。
Q19:
Historian: In the Drindian Empire, censuses were conducted annually to determine the population of each village. Village census records for the last half of the 1600’s are remarkably complete. This very completeness makes one point stand out; in five different years, villages overwhelmingly reported significant population declines. Tellingly, each of those five years immediately followed an increase in a certain Drindian tax. This tax, which was assessed on villages, was computed by the central government using the annual census figures. Obviously, whenever the tax went up, villages had an especially powerful economic incentive to minimize the number of people they recorded; and concealing the size of a village’s population from government census takers would have been easy. Therefore, it is reasonable to think that the reported declines did not happen.
历史家：在D王朝，每年都会在每个村进行人口普查。村庄的人口统计记录在17世纪的后半部是非常完整的。这个完整的记录让一个现象非常突出，那就是每五年，乡村人口就会有显著和减少，而这种人口的减少总是跟着一次D税收的提高。这种税收是依据每年的人口统计数据来征收的。明显，每当提一次税收，乡村就会有出于经济考虑的理由来减少缴税人数，而简单的办法就是让官方掌握的资料中人口的减少。所以，有理由相信统计资料中体现出来的人口减少并没有真正发生。(打成中文意思就那么清楚，我当初做这题怎么翻来复去觉得绕呢，现在看一点也不绕呀---此为感叹，请忽略不记)
In the historian’s argument, the two portions in boldface play which of the following roles?
The first supplies a context for the historian’s argument; the second acknowledges a consideration that has been used to argue against the position the historian seeks to establish.前后两个完全是一个腔调在说话，所以看到一个在反对另一个的马上就可以确认为是错误答案
The first presents evidence to support the position that the historian seeks to establish; the second acknowledges a consideration that has been used to argue against that position.同A
The first provides a context for certain evidence that supports the position that the historian seeks to establish; the second is that position. 因为记录是准确的，所以人们可以发现每五年在每次提税前就有一次人口减少，以此来推出结论。
The first is a position for which the historian argues; the second is an assumption that serves as the basis of that argument. 第一个黑体不是历史学家argue的，这个是他来加强结论的证据。
The first is an assumption that the historian explicitly makes in arguing for a certain position; the second acknowledges a consideration that calls that assumption into question.同A
Q20:
Scientists typically do their most creative work before the age of forty. It is commonly thought that this happens because aging by itself brings about a loss of creative capacity. However, studies show that a disproportionately large number of the scientists who produce highly creative work beyond the age of forty entered their field at an older age than is usual. Since by the age of forty the large majority of scientists have been working in their field for at least fifteen years, the studies’ finding strongly suggests that the real reason why scientists over forty rarely produce highly creative work is not that they have simply aged but rather that they generally have spent too long in a given field.
科学家们最具创造性的工作往往是在他们四十岁前完成的。通常认为这是因为随着年纪的增长创造力会减退。但是研究发现：绝大部分在近四十岁时有最具创造性成就的科学家往往比一般的科学家更晚进入这个行业。也就是说一般来讲到四十岁科学在他们各自的行业已经工作了至少15年，所以造成科学家没有创造性的原因不是年纪而是因为他们在这个领域的时间太长了。
In the argument given, the two portions in boldface play which of the following roles?
The first is the position that the argument as a whole opposes; the second is an objection that has been raised against a position defended in the argument. 第二个是反对第一个的证据，不是这个的全错。
The first is a claim that has been advanced in support of a position that the argument opposes; the second is a finding that has been used in support of that position. 同A
The first is an explanation that the argument challenges; the second is a finding that has been used in support of that explanation. 同A
The first is an explanation that the argument challenges; the second is a finding on which that challenge is based.正确
The first is an explanation that the argument defends; the second is a finding that has been used to challenge that explanation. 第一个是作者反对的，不是这个的全错。
Q21:
In Teruvia, the quantity of rice produced per year is currently just large enough to satisfy domestic demand. Teruvia’s total rice acreage will not be expanded in the foreseeable future, nor will rice yields per acre increase appreciably. Teruvia’s population, however, will be increasing significantly for years to come. Clearly, therefore, Teruvia will soon have to begin importing rice.
T国，现在的大米产量刚好够满足本国的需求。在可以预见的的将来，T国的大米种植地面积不会增加，平均产量不会明显提高，但T国的人口却会显著增加。所以明显的T国在不久的将来就不得不开始进口大米了。
Which of the following is an assumption on which the argument depends?
No pronounced trend of decreasing per capita demand for rice is imminent in Teruvia.没有明显的倾向T国人均用米量会明显减少。
Not all of the acreage in Teruvia currently planted with rice is well suited to the cultivation of rice. 现在没有种大米的地不适合来做，题目中已经限定了种大米的地不会增加，所以不管适不适合，都不会用来种大米。
None of the strains of rice grown in Teruvia are exceptionally high-yielding.T国没有高产的稻米品种。这个同B，题干中已经说了平均产量不会提高。所以已经不需要考虑有没有可能让它的产量增加了。
There are no populated regions in Teruvia in which the population will not increase.同AB，题干中已经给出的条件就是不可更改的条件。
There are no major crops other than rice for which domestic production and domestic demand are currently in balance in Teruvia. 现在T国有没有供需持平的本国产的主食都解决不了T国要没米吃的残酷事实。
Q26:
Healthy lungs produce a natural antibiotic that protects them from infection by routinely killing harmful bacteria on airway surfaces. People with cystic fibrosis, however, are unable to fight off such bacteria, even though their lungs produce normal amounts of the antibiotic. The fluid on a0.irway surfaces in the lungs of people with cystic fibrosis has an abnormally high salt concentration; accordingly, scientists hypothesize that the high salt concentration is what makes the antibiotic ineffective.
健康的肺会产生一个抗生素可以将有害的细菌杀死。患了C病的病人的肺却杀不死细菌即使他们的肺也产生和健康人一样数量的抗生素。其原因在于患了C病的病人肺部外表有高浓度的盐含量，因此科学家怀疑正是这个高浓度的盐含量让抗生素失效的。
Which of the following, if true, most strongly supports the scientists’ hypothesis?
When the salt concentration of the fluid on the airway surfaces of healthy people is raised artificially, the salt concentration soon returns to normal. 这个是说健康人的肺如果调节，和病人的没关系。
A sample of the antibiotic was capable of killing bacteria in an environment with an unusually low concentration of salt.说明抗生素在低盐环境中起作用，但是在高盐环境中起不起作用仍然不晓得。
When lung tissue from people with cystic fibrosis is maintained in a solution with a normal salt concentration, the tissue can resist bacteria. 说明抗生素起不起作用的区别就是其环境是不是含高盐。正确。
Many lung infections can be treated by applying synthetic antibiotics to the airway surfaces. 这个是说另外的抗生素有用，但是没有解释为什么病人自体的抗生素没用。
High salt concentrations have an antibiotic effect in many circumstances.在其它环境中不等于在病人体内，所以发言无效。
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