【OG24-788题】Which of the following most logically completes the argument given? Asthma, a chronic breathing disorder, is significantly more common today among adult competitive swimmers than it is among competitive athletes who specialize in other sports. Although chlorine is now known to be a lung irritant and swimming pool water is generally chlorinated, it would be rash to assume that frequent exposure to chlorine is the explanation of the high incidence of asthma among these swimmers, since______. _mofa留学圈mofaGRE在线题库系统_GRE在线搜题_GRE题库解析_GRE真题机经_GRE课程_GRE培训机构

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Which of the following most logically completes the argument given?

Asthma, a chronic breathing disorder, is significantly more common today among adult competitive swimmers than it is among competitive athletes who specialize in other sports. Although chlorine is now known to be a lung irritant and swimming pool water is generally chlorinated, it would be rash to assume that frequent exposure to chlorine is the explanation of the high incidence of asthma among these swimmers, since______.

young people who have asthma are no more likely to become competitive athletes than are young people who do not have asthma competitive athletes who specialize in sports other than swimming are rarely exposed to chlorine competitive athletes as a group have a significantly lower incidence of asthma than do people who do not participate in competitive athletics until a few years ago, physicians routinely recommended competitive swimming to children with asthma, in the belief that this form of exercise could alleviate asthma symptoms many people have asthma without knowing they have it and thus are not diagnosed with the condition until they begin engaging in very strenuous activities, such as competitive athletics

正确答案： D

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题干翻译
哮喘，一种慢性呼吸障碍，在如今的成年竞技游泳运动员中比在其他专项竞技运动员中显著更为常见。尽管现在已知氯是一种肺部刺激物且游泳池水通常含氯，但假定频繁接触氯是这些游泳运动员中哮喘高发的原因是草率的，因为______。 逻辑链
Swimmers have more asthma ≠ Chlorine is the cause 问题类型
原因解释（补充原因说明为什么不能认定氯是游泳运动员哮喘高发的原因） 推理过程
题干指出游泳运动员哮喘发生率高且游泳池水含氯，但又说不能草率认为氯是原因，需要找到其他合理原因来解释为何不能这么认定。 选项分析
A选项：有哮喘的年轻人成为竞技运动员的可能性不比没有哮喘的年轻人高。这与不能认定氯是游泳运动员哮喘高发原因无关，排除。 B选项：非游泳专项的竞技运动员很少接触氯。讨论的是其他运动员接触氯的情况，没有解释为什么不能认定氯是游泳运动员哮喘高发的原因，排除。 C选项：竞技运动员整体比不参加竞技运动的人哮喘发生率低很多。比较的是竞技运动员和非竞技运动员的哮喘发生率，未针对游泳运动员哮喘高发与氯的关系，排除。 D选项：直到几年前，医生们经常向患有哮喘的儿童推荐竞技游泳，认为这种运动形式可以缓解哮喘症状。说明可能是因为本来就有哮喘的孩子被推荐去游泳，所以游泳运动员中哮喘患者多，而不是因为氯，解释了不能认定氯是原因，当选。 E选项：许多人有哮喘却不知道，直到从事像竞技运动这样非常剧烈的活动时才被诊断出来。没有针对游泳运动员中哮喘高发和氯之间的关系进行解释，排除。

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