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GMAT逻辑解释题二

GMAT逻辑解释题二

作者: Julietthebest | 来源:发表于2018-10-25 22:34 被阅读1次

    《GMAT逻辑解释题一》里面我们讲述了解释题的一种出题模式:A-B,但是A-(-B),解释这种题型的思路是A-C-(-B)。因为A可以带来B这种结果,也可以带来C这种结果,而C结果最终会导致与B相反的结果,所以这种方法我们可以简称为解释题目里面的二分法。任何事情都不是一刀切的,也不是非黑即白的,而是多元的。所以做这类解释题目主要是找准问题,同时看选项里面有没有提到A这件事情带来的其它结果C,C会导致事情向相反的-B发展。


    例一:

    Wolves generally avoid human settlements.For this reason, domestic sheep, though essentially easy prey for wolves, arenot usually attacked by them. In Hylantia prior to 1910, farmers neverthelesslost considerable numbers of sheep to wolves each year. Attributing this to thelarge number for wolves, in 1910 the government began offering rewards tohunters for killing wolves. From 1910 to 1915, large numbers of wolves werekilled. Yet wolf attacks on sheep increased significantly.

    Which of the following, if true, most helpsto explain the increase in wolf attacks on sheep?

    A. Populations of deer and other wildanimals that wolves typically prey on increased significantly in numbers from1910 to 1915.

    B. Prior to 1910, there were no legalrestrictions in Hylantia on the hunting of wolves.

    C. After 1910 hunters shot and wounded asubstantial number of wolves, thereby greatly diminishing these wolves’ abilityto prey on wild animals.

    D. Domestic sheep are significantly lessable than most wild animals to defend themselves against wolf attacks.

    E. The systematic hunting of wolvesencouraged by the program drove many wolves in Hylantia to migrate to remotemountain areas uninhabited by humans.


    解题题依然会按照以下方法讲解。

    FYI:大家在做题的时候也要按照这个步骤去解题。

    1 判断是否属于解释题

    2 找出问题

    3 查看选项


    1 判断是否属于解释题

    Which of the following, if true, most helps to explain the increase in wolf attacks on sheep?中出现了helps to explain所以毫无疑问是解释题。

    2 找出问题

    Wolves generally avoid human settlements.For this reason, domestic sheep, though essentially easy prey for wolves, arenot usually attacked by them. In Hylantia prior to 1910, farmers nevertheless lost considerable numbers of sheep to wolves each year. Attributing this to thelarge number for wolves, in 1910 the government began offering rewards to hunters for killing wolves. From 1910 to 1915, large numbers of wolves werekilled. Yet wolf attacks on sheep increased significantly.

    狼虽然很容易攻击家养的羊,但是因为狼通常避免人群,所以不怎么吃家养的羊。在1910年之前,狼吃了大量的羊,因此大量捕杀狼。

    1910-1915

    大量狼被杀A , 预期被狼攻击的羊的量会减少B

    但是

    大量狼被杀A , 被狼攻击的羊的量增加-B

     

    解题思路:

    这属于A-B 但是A-(-B)类型,所以一定是A带来了一个结果C从而导致–B出现。言外之意是大量狼被杀A带了结果C,C造成被狼攻击的羊的量增加-B。

    3 查看选项 

    A选项提到狼通常吃的其它野生动物大幅度增加。狼原理人群,也会原理人,但是狼的其它野生动物事物显著增加,照理说狼就该吃这些野生动物,所以A选项不仅不可以解释,还会加剧矛盾。A选项排除。

    B选项说之1910前不限制捕杀狼,与1910-1915狼少了为啥狼捕杀的羊的量还增加这个事情没有关系,也不能解释。A选项排除。

    补充:

    当提到在某一段时间之后有某种变化,一般时间不一致的话,不能选。因为时间点前后已经有变化,有区别,不能再用不同的时间里面发生的事情去解释出现变化时间段里面的事情。

    C选项说1910之后,猎人伤了和杀了大量的狼之后,因此极大的减少了它们捕食其它野生动物的能力。这就是我们所说的大量狼被杀之后带来的其它变化C,减少捕食其它野生动物的能力,那么它们就只能吃家羊了。C选项留下。

    D选项说家羊相比野生动物不能很好保护自己,抵御狼的攻击。这是一个客观事实,无法解释题目里面说的狼减少了为啥攻击的羊的数量还增加。D选项排除。

    E 选项说大量捕杀狼之后会把它们驱赶到远离人居住的地方,因为羊是家羊,所以朗距离羊会更远,所以这个也是加剧了这个矛盾,E选项无法排除。

    正确选项C

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