GMAT考试思维逻辑解析：数量范围题.pdf

智 课 网 G M A T 备 考 资 料 GMAT考试思维逻辑解析 数量范围题 GMAT考试中的逻辑部分是考生备考的重点内容 主要是因为这部 分比较难 正确的解答GMAT逻辑部分的试题需要考生掌握一定的GM AT考试技巧 太刀小编针对这种情况总结了常考内容中有关数量范围题 的介绍 供考生备考使用 GMAT考试中数量的范围是逻辑题常考 特别是MUST BE问题 混 淆答案也常来于此 下面一题是LSAT 先讨论 后再公布答案及解释 The importance of the ozone layer to terrestrial animals is that it entirely filters out some wavelengths of light but lets others through Holes in the ozone layer and the dangers associated with these holes are well documented However one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species Which one of the following is most strongly supported by the statements above if they are true A All wavelengths of sunlight that can cause eye damage are filtered out by the ozone layer where it is intact B Few species of animals live on a part of the earth s surface that is not threatened by holes in the ozone layer C Some species of animals have eyes that will not suffer any damage when exposed to unfiltered sunlight D A single wavelength of sunlight can cause severe damage to the eyes of most species of animals E Some wavelengths of sunlight that cause eye damage are more likely to reach the earth s surface where there are holes in the ozone layer than where there are not 分析部分 The importance of the ozone layer to terrestrial animals is that it entirely filters out some wavelengths of light but lets others through Holes in the ozone layer and the dangers associated with these holes are well documented However one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species Which one of the following is most strongly supported by the statements above if they are true 针对文章采取的GMAT逻辑分析 A All wavelengths of sunlight that can cause eye damage are filtered out by the ozone layer where it is intact 错的原因 All wavelengths 太strong 原文只知完好的臭氧层滤掉一部分光 让一 部分通过 并说通过的那部分对很多动物有害 从这点很容易误认有害 的都给滤掉了 其实原文没说是否那通过的一部分是否含有有害波长 这里采用GMAT考试技巧中的排除法 所以错 原文问 is most strongly supported by the statements above 如果问哪个选项support 结论 A应该是个好选项 非常stron g 但是因为是被原文支持 选项不能超越原文提供的范围 some wavelengths 不能推出all wavelengths 所以A错了 B Few species of animals live on a part of the earth s surface that is not threatened by holes in the ozone layer错的原因 原文只说有HOLE可能会使很多动物受伤害 从这点也许可以推出有 动物生活在受HOLE威胁的地方 但原文没说有没有动物生活在不受HO LE威胁的地方 故错 C Some species of animals have eyes that will not suffer any damage when exposed to unfiltered sunlight错的原因 有些人容 易选这个 因为原文最后一句话说HOLE会伤害很多动物的眼睛 就是 说很多动物的眼睛会受伤害 既然有很多的眼睛受伤害 就有不受伤害 的 错 关键是理解原文最后一句话的many 其实相当于some 表 达的是有的概念 就是可以是1 100 相对或取非的概念为NONE 就 是说它们可以包括全部100 所以有可能全部动物眼睛都会受HOLE伤 害 即C可能对 也可能不对 这里采用GMAT考试技巧中的排除法 不是MUST BE TRUE 故错 我觉得这里不是some的原因 而是全文说could lead to severe eye damage for animals of many species 由于是答案被原文支持 所以答案一定不能超越原文的界限 因为原文为严重伤害很多种类的 眼睛 我们只能得到 有些种类的眼睛没有被严重的伤害 可以做绝对正确的推论 但是说有些种类的眼睛根本没有被伤害 就不能是mustberight的选项了 所以该选项不能成为正确选项 D A single wavelength of sunlight can cause severe damage to the eyes of most species of animals错的原因 也是容易选错 因 为原文的最后一句话加上中文对MANY和 MOST 都是很多 的理解 其 实MOST 多数 是指51 100 MANY指1 100 所以不能从MANY推出 MOST 从MOST倒可以推出MANY 即原文用MOST 这里采用GMA T考试技巧中的排除法 D选项用MANY 则为答案 E Some wavelengths of sunlight that cause eye damage are more likely to reach the earth s surface where there are holes in the ozone layer than where there are not 从原文最后两句话可知完 好的臭氧层滤掉了部分有害的光线 则说明有洞时 有害的光线更易到 达地球 故对 最后强调一点该问题虽然是MOST STRONGLY SUPPOR