GMAT逻辑考试的常见题型有哪几类?其对应的解题技巧又有哪些呢?本文将着重对GMAT逻辑考试中的常见题型及解题技巧深入的讲解，希望能够为考生备考GMAT逻辑考试带来帮助。
　　Explain/Solve the Discrepancy及填空题解题原则：定义结论句之因果关系, 并确认议题焦点 (好吧这句话如幽灵一般又出现了= =)
　　* 题目中有矛盾现象者：通常有转折字眼(极少数情况中无转折字，但句意上仍可找出矛盾处)
　　- 找出矛盾句后出现的因果关系(因果之间会有矛盾)
　　- 定义因--->预期果(预期结论通常与题目中的结果是相反状况)
　　- 正确答案：否定预期果
　　- 错误答案：同Weaken类型
　　* 题目中无矛盾现象者：
　　- 视为Assumption类型来做
　　> 题目中可辨识因果关系(结论句)者，找否定Weaken的答案
　　> 题目中有跳跃结果者，找找补缺口的答案
　　找出题目--->结论--->答案间可连结的关系
　　题目--->结论间出现的新元素，要在答案中可找到
　　Some Tips：
　　Explain题中若无矛盾现象，较多为填补缺口类型
　　例题讲解：
　　A report that many apples contain a cancer-causing preservative called Alar apparently had little effect on consumers. Few consumers planned to change their apple-buying habits as a result of the report. Nonetheless, sales of apples in grocery stores fell sharply in March, a month after the report was issued.
　　Which of the following, if true, best explains the reason for the apparent discrepancy described above?
　　首先梳理题目条件：
　　(1)一份报告说很多苹果中含有一种致癌的防腐剂成分，但是这份报告在消费者心目中的影响很小，并没有多少人因为看到这份报告就改变了他们买苹果的习惯
　　(2)但是在这份报告发出一个月之后的3月份，苹果的销量一下子减少了很多
　　问如何解释这一矛盾现象。
　　既然题目中已经说明苹果销量的下降不是由报告的危言耸听引起的，因此我们可以得出正确答案与报告不会有直接关系。
　　(A) In March, many grocers removed apples from their shelves in order to demonstrate concern about their customers' health.
　　正解。本选项说指出因为销售水果的人为了表示对顾客身体健康的关注而将苹果撤柜，也就是说供應量会减少，而供应量的减少亦会直接影响苹果的销量，因此本选项正确。
　　(B) Because of a growing number of food-safety warnings, consumers in March were indifferent to such warnings.
　　本选项说的是因为关于食品卫生的警告越来越多，3月份的时候顾客都对这些警告不感兴趣了。个人觉得这个选项本质上可以算是条件(1)的一个题目补充条件，而且这个选项也不能解释为什么在顾客把警告神马的都无视的情况下(插一句嘴：这让我想起了一句话：不干不净，吃了没病= =)3月份苹果的销量降了，因而错误。
　　(C) The report was delivered on television and also appeared in newspapers.
　　本选项说的是这份报告是在电视和报纸1发布的，完全没有提到为什么3月份苹果销量降低，并且前面我们已经分析到正确答案和报告不会有什么直接联系，因此本选项错误。
　　(D) The report did not mention that any other fruit contains Alar, although the preservative is used on other fruit.
　　本选项说虽然A防腐剂也被应用到了其他的水果上，但是这份报告没有提到其他含有A防腐剂的水果，与题目中心论点“3月份苹果销量为什么会下降”无关。这个选项本质和C选项是一样的，都是将焦点转移到了报告上，所以错误。
　　(E) Public health officials did not believe that apples posed a health threat because only minute traces of Alar were present in affected apples.
　　本选项说官方压根不信苹果会成为健康威胁(吐槽一句：不然你让某句名言“An apple a day, keeps the doctor away"情何以堪～)，因为只检测出了微量的A防腐剂放射痕迹。这选项我表示完全就是个来打酱油的，如果这个选项是真的，就更不可能出现3月苹果销量下降这回事了，因而错误。
　　Which of the following most logically completes the argument below?
　　Davison River farmers are currently deciding between planting winter wheat this fall or spring wheat next spring. Winter wheat and spring wheat are usually about equally profi table. Because of new government restrictions on the use of Davison River water for irrigation, per acre yields for winter wheat, though not for spring wheat, would be much lower than average. Therefore, planting spring wheat will be more profi table than planting winter wheat, since ______________.
　　这题怎么看怎么像数学题....引用skyzhang版主以前的解释：
　　冬麦数量少，春麦数量多。两者的过去的利润是一样的。但是，这次冬麦数量少了，所以春麦的利润要好。这里忽略的(也是文章since后面需要补充的)就是价格问题。
　　如果，冬麦数量少，但是价格非常高，这样就可能造成冬麦的利润好。所以要排除这个可能性，也即是A说的。
　　(A) the smaller-than-average size of a winter wheat harvest this year would not be compensated for by higher winter wheat prices正解。我觉得理由skyzhang版主解释的已经很清楚了，所以我就不再画蛇添足了...
　　(B) new crops of spring wheat must be planted earlier than the time at which standing crops of winter wheat are ready to be harvested
　　本选项说：春麦必须要种的比冬麦收获的时间早，没有提到价格，也就是说，没办法排除掉前面提出的“冬麦数量少但是价格高”这一命题，因此属于无关选项。
　　(C) the spring wheat that farmers in the Davison River region plant is well adapted to the soil of the region
　　本选项说DR地区的土壤很适合春麦种植，也没有提到价格问题，所以也属于无关选项。
　　(D) spring wheat has uses that are different from those of winter wheat
　　本选项说春麦和冬麦的用途不一样，在没有提到价格的情况下，我们仍然无法知道为什么春麦就一定比冬麦赚钱，因此本选项也错误。
　　(E) planting spring wheat is more profitable than planting certain other crops, such as rye
　　本选项说种春麦的profit要比其他的庄稼要高，提到了新事物。但是从题目可以看出，这个新元素和题干没有任何联系，因为题目仅仅只是冬麦和春麦相比，并没有提到其他的庄稼，所以无关。
　　练习：
　　TN3-Q8:
　　When a new restaurant, Martin’s Cafe, opened in Riverville last year, many people predicted that business at the Wildflower Inn, Riverville’s only other restaurant, would suffer from the competition. Surprisingly, however, in the year since Martin’s Cafe opened, the average number of meals per night served at the Wildflower Inn has increased significantly.Which of the following, if true, most helps to explain the increase?
　　A. Unlike the Wildflower Inn, Martin’s Cafe serves considerably more meals on weekends than it does on weekdays.
　　B. Most of the customers of Martin’s Cafe had never dined in Riverville before this restaurant opened, and on most days Martin’s Cafe attracts more customers than it can seat.
　　C. The profit per meal is higher, on average, for meals served at Martin’s Cafe than for those served at the Wildflower Inn.
　　D. The Wildflower Inn is not open on Sundays, and therefore Riverville residents who choose to dine out on that day must either eat at Martin’s Cafe or go to neighboring towns to eat.
　　E. A significant proportion of the staff at Martin’s Cafe are people who formerly worked at the Wildflower Inn and were hired away by the owner of Martin’s Cafe.
　　TN08-Q15
　　Which of the following most logically completes the argument below?Although the number of large artificial satellites orbiting the Earth is small compared to the number of small pieces of debris in orbit, the large satellites interfere more seriously with telescope observations because of the strong reflections they produce. Because many of those large satellites have ceased to function, the proposal recently been made to eliminate interference from nonfunctioning satellites by exploding them in space. This proposal, however, is ill conceived, since ________.
　　A. Many nonfunctioning satellites remain in orbit for years
　　B. For satellites that have ceased to function, repairing them while they are in orbit would be prohibitively expensive
　　C. There are no known previous instances of satellites’ having been exploded on purpose
　　D. The only way to make telescope observations without any interference from debris in orbit is to use telescopes launched into extremely high orbits around the Earth
　　E. A greatly increased number of small particles in Earth’s orbit would result in a blanket of reflections that would make certain valuable telescope observations impossible
　　以上内容对GMAT逻辑考试中的常见题型及解题技巧进行了详细的讲解，考生可以根据文中重点进行针对性的练习，掌握并熟练应用GMAT逻辑试题的解题思路，从而在GMAT考试中取得好成绩。