GMAT考试有哪些易错点呢 GMAT备考

　　许多GMAT考生在接触逻辑之后会觉得比较逻辑部分抽象，正确率提升较慢。逻辑对考生的分析能力和判断能力要求比较高，但很大一部分失分的原因是因为没有理清楚比较模糊的易错考点。下面就为大家分析一下几个易错的点：
　　- 以偏概全
　　逻辑题干或者选项中很容易出现以偏概全或者过度推论的情况，通常的表现形式是用个别的，特殊的例子来推出一个普遍的结论。比如说，我们看下面这道例题的题干部分：
　　Journalist: In physics journals, the number of articles reporting the results of experiments involving particle accelerators was lower last year than it had been in previous years. Several of the particle accelerators at major research institutions were out of service the year before last for repairs, so it is likely that the low number of articles was due to the decline in availability of particle accelerators.
　　翻译提炼题干信息我们发现这道题目中的逻辑链是这样的：
　　P：许多大机构的粒子加速器去年都送去维修了
　　C：所以去年关于粒子加速器实验的论文发表数量减少是由于这个原因
　　我们可以发现，这个前提和结论之间很明显出现了一个漏洞就是题干把所有可能导致论文发表数量减少的原因都归结于机器的维修，从而否定了其他的可能性。这就是一种过度推论的错误。而在考试中，考生或许会因为推论本身是正确可能性的一种而忽略了“过度”。这种类型的易错点常常会出现在削弱题型种。因此，在逻辑考试中，需要注意不要被此类的迷惑性选项和题干干扰。
　　- 迷惑性背景信息
　　另一个比较容易出错的点是题干或选项中出现的背景信息。这类信息通常是正确的，但往往与逻辑关系中的项无关。比如说下面这道例题：
　　Kate: The recent decline in numbers of the Tennessee warbler, a North American songbird that migrates each fall to coffee plantations in South America, is due to the elimination of the dense tree cover that formerly was a feature of most South American coffee plantations.
　　Scott: The population of the spruce budworm, the warbler's favorite prey in North America, has been dropping. This is a more likely explanation of the warbler's decline. Which of the following, if true, most seriously calls Scott's hypothesis into question?
　　A. The numbers of the Baltimore oriole, a songbird that does not eat budworms but is as dependent on South American coffee plantations as is the Tennessee warbler, are declining.
　　B. The spruce budworm population has dropped because of a disease that can infect budworms but not Tennessee warblers.
　　C. The drop in the population of the spruce budworm is expected to be only temporary.
　　D. Many Tennessee warblers have begun migrating in the fall to places other than traditional coffee plantations.
　　E. Although many North American songbirds have declined in numbers, no other species has experienced as great a decline as has the Tennessee warbler.
　　我们可以发现，选项D就属于一个比较易错的点。因为选项本身叙述是正确的，但仔细思考它更像是咖啡种植园树的密度减少后的结果。与题干中主体Tennessee warbler，以及食物budworm无关，因此是无法削弱Scott的结论的。因此许多看似正确的信息其实只是迷惑性的背景信息，而不是————终的正确答案。尤其是在一些难度较高的题目中，常常会出现较多较复杂的背景信息，考生需要理清逻辑关系和思路。
　　- 模糊词
　　另一个比较容易弄错的点是一些模糊词，并无法体现具体的程度和意义。比如说我们阅读一下下面这道例题：
　　Teenagers are often priced out of the labor market by the government-mandated minimum-wage level because employers cannot afford to pay that much for extra help. Therefore, if Congress institutes a subminimum wage, a new lower legal wage for teenagers, the teenage unemployment rate, which has been rising since 1960, will no longer increase.

　　Which of the following, if true, would most weaken the argument above?
　　A. Since 1960 the teenage unemployment rate has risen when the minimum wage has risen.
　　B. Since 1960 the teenage unemployment rate has risen even when the minimum wage remained constant.
　　C. Employers often hire extra help during holiday and warm weather seasons.
　　D. The teenage unemployment rate rose more quickly in the 1970’s than it did in the 1960’s.
　　E. The teenage unemployment rate has occasionally declined in the years since 1960.
　　我们可以看到E选项中出现了occasionally这个词，首先这个选项本身与题干中提到的低工资没有联系起来，其次occasionally这个词本身并无法具体地表达decline的程度，长度以及具体频率，因此是一种‘无意义’的表达。虽然并不是所有出现此类词的选项都是错误的，但是很大一部分是无意义表达，所以同学们在看到诸如some，occasionally这种表达模糊概念的词需要引起注意。