【专题 GMAT逻辑题】
Maize contains the vitaminniacin, but not in a form the body can absorb. Pellagra is a disease thatresults from niacin deficiency. When maize was introduced into southern Europefrom the America 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 Americas, however, even among peoplewho subsisted primarily on maize.
Whichof the following, if true, most helps to explain the contrasting incidence ofpellagra described above?
(A)Once introduced into southern Europe, maize became popular with landownersbecause of its high yields relative to other cereal crops.
(B)Maize grown in the Americas contained more niacin than maize grown in Europedid.
(C)Traditional ways of preparing maize in the Americas convert maize’s niacin intoa nutritionally useful form.
(D)In southern Europe many of the people who consumed maize also ate niacin-richfoods.
(E) Before the discovery of pellagra’slink with niacin, it was widely believed that the disease was an infection thatcould be transmitted from person to person.
诗歌的翻译者必须实现字与字的对译，这在任何语言中都不存在的，正如钢琴的旋律不可能发生在小提琴的演奏中一样。当然，小提琴可以演奏钢琴同样的作品，但是，只有小提琴演奏者按照小提琴固有的、内在的风格演奏，才可以完美地表现原作的精神。以下哪项最可能是上述论证的一个结论？
中国科研环境在持续改善。数据显示，2016年，中国研发经费投入总量为1.57万亿元，成为仅次于美国的世界第二大研发经费投入国家，随着一系列国家重点创新项目、重点学科和重点实验室陆续建立，今天的中国，已有能力为科研人员提供不输于西方国家的科研条件。下列各项如果为真，最能加强上述论证的是（）
以下诸项结论都是某理工学院学生处根据各个系收到的1997~1998学年度奖助学金申请表综合得出的。在此项综合统计做出后，因为落实灾区政策，有的系又收到了一些学生补交上来的申请表。
以下哪项结论最不可能被补交奖助学金申请表这一新事实所推翻？
①P（A+B）=P（A）+P（B）；
②P（A+ . A ）=P（A）+P（ . A ）；
③P（A∪ . A ）=1；
④若P（A）=1，则事件A一定是必然事件．
注:事件A的对立事件记为A，然后在A的上面还有一点。因为33不能用特殊符号，我就把点移到左侧，变成.A。
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