课程咨询

GMAT首页 GMAT课程 GMAT动态 0元讲座 GMAT模考网站

新东方在线 > GMAT > GMAT逻辑 > 正文
美研留学资料领取

扫码添加助教

免费领取

备考资料大礼包

扫码关注公众号

GMAT逻辑削弱题例题四

2018-05-02 17:08:00来源：网络

　　19.(Z13)Healthy lungs produce a natural antibiotic that protects them from infection by routinely killing harmful bacteria on airway surfaces. People with cystic fibroses, however, are unable to fight off such bacteria, even though their lungs produce normal amounts of the antibiotic. Since the fluid on airway surfaces in the lungs of people with cystic fibrosis bas an abnormally high salt concentration, scientists hypothesize that in high salt environments the antibiotic becomes ineffective at killing harmful bacteria.

　　Which of the following, if it were obtained as an experimental result, would most decisively undermine the scientists’ hypothesis?

　　A. Healthy lungs in which the salt concentration of the airway-surface fluid has been substantially increased are able to reestablish their normal salt concentration within a relatively short period of time.

　　B. The antibiotic produced by the lungs is effective at killing harmful bacteria even when salt concentrations are below levels typical of healthy lungs.

　　C. The salt concentration of the airway-surface fluid in the lungs of people who suffer from cystic fibrosis tends to return to its former high levels after having been reduced to levels typical of healthy lungs.

　　D. The lungs of people who suffer from cystic fibrosis are unable to fight off harmful bacteria even when the salt concentration is reduced to levels typical of healthy lungs.

　　E. The salt concentration in the airway-surface fluid of people whose lungs produce lower-than-average amounts of the antibiotic is generally much lower than that typical of healthy lungs.

　　20. The number of people diagnosed as having a certain intestinal disease has dropped significantly in a rural county this year, as compared to last year. Health officials attribute this decrease entirely to improved sanitary conditions at water-treatment plants, which made for cleaner water this year and thus reduced the incidence of the disease.

　　Which of the following, if true, would most seriously weaken the health officials' explanation for the lower incidence of the disease?

　　(A) Many new water-treatment plants have been built in the last five years in the rural county.

　　(B) Bottled spring water has not been consumed in significantly different quantities by people diagnosed as having the intestinal disease, as compared to people who did not contract the disease.

　　(C) Because of a new diagnostic technique, many people who until this year would have been diagnosed as having the intestinal disease are now correctly diagnosed as suffering from intestinal ulcers.

　　(D) Because of medical advances this year, far fewer people who contract the intestinal disease will develop severe cases of the disease.

　　(E) The water in the rural county was brought up to the sanitary standards of the water in neighboring counties 10 years ago.

课程推荐》》更多

  GMAT直播VIP小班    GMAT直播精讲班    GMAT录播课
（VIP小班/全科班+1对1）（全科精讲/单项备考） （全科班/单项班）
 72.5课时 ￥18800 61课时 ￥7796 134课时 ￥14680

本文关键字: GMAT逻辑题型 GMAT逻辑 GMAT

上一页 1 2 下一页

添加美研助教号 回复【GMAT】

获取2024GMAT考试最新复习资料

更多资料

添加美研助教号，
回复【GMAT】获取备考必看资料包

  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加美研助教】，回复对应关键字领取学习资料。
更多>>
  • GRE与GMAT逻辑推理题对比

    　　新东方在线GMAT频道为大家带来GRE与GMAT逻辑推理题对比，希望对大家GMAT备考有所帮助。更多精彩尽请关注新东方在线GMAT频道!　　GRE&GM

    来源 : 网络 2021-02-27 09:53:00 关键字 : GMAT逻辑

  • GMAT逻辑主要题型及解题思路

    　　新东方在线GMAT频道为大家带来GMAT逻辑主要题型及解题思路，希望对大家GMAT备考有所帮助。更多精彩尽请关注新东方在线GMAT频道!　　GMA

    来源 : 网络 2021-02-27 09:46:00 关键字 : GMAT逻辑

  • GMAT逻辑之重点：抓住结论

    　　新东方在线GMAT频道为大家带来GMAT逻辑之重点：抓住结论，希望对大家GMAT备考有所帮助。更多精彩尽请关注新东方在线GMAT频道!　　从题

    来源 : 网络 2021-02-27 09:38:00 关键字 : GMAT逻辑

  • GMAT逻辑5个常见提问提示词

    　　新东方在线GMAT频道整理了《GMAT逻辑5个常见提问提示词》，希望对大家的2021GMAT逻辑备考有所帮助。　　什么是逻辑提问词?　　所谓逻辑

    来源 : 网络 2021-02-09 09:56:00 关键字 : GMAT逻辑

  • GMAT逻辑3种主流出题思路解析

    　　新东方在线GMAT频道整理了《GMAT逻辑3种主流出题思路解析》，希望对大家的2021GMAT逻辑备考有所帮助。　　GMAT逻辑3大解题技巧详解　　

    来源 : 网络 2021-02-08 15:08:57 关键字 : GMAT逻辑

  • GMAT逻辑如何判断陷阱选项

    　　新东方在线GMAT频道整理了《GMAT逻辑如何判断陷阱选项》，希望对大家的2021GMAT逻辑备考有所帮助。　　GMAT逻辑选项思维陷阱实例1：不

    来源 : 网络 2021-02-08 15:06:07 关键字 : GMAT逻辑

  • GMAT逻辑考察的内容 　　

    　　新东方在线GMAT频道为大家带来GMAT逻辑考察的内容，希望对大家GMAT备考有所帮助。更多精彩尽请关注新东方在线GMAT频道!　　一、gmat逻

    来源 : 网络 2021-01-25 13:27:00 关键字 : GMAT逻辑 GMAT

  • GMAT逻辑推理的具体方法 　　

    　　新东方在线GMAT频道为大家带来GMAT逻辑推理的具体方法，希望对大家GMAT备考有所帮助。更多精彩尽请关注新东方在线GMAT频道!　　考前1周

    来源 : 网络 2021-01-25 13:27:00 关键字 : GMAT逻辑 GMAT

  • GMAT逻辑题型的分类 　　

    　　新东方在线GMAT频道为大家带来GMAT逻辑题型的分类，希望对大家GMAT备考有所帮助。更多精彩尽请关注新东方在线GMAT频道!　　1、论点构造

    来源 : 网络 2021-01-25 13:27:00 关键字 : GMAT逻辑 GMAT

  • GMAT逻辑重要的解题技巧 　　

    　　新东方在线GMAT频道为大家带来GMAT逻辑重要的解题技巧，希望对大家GMAT备考有所帮助。更多精彩尽请关注新东方在线GMAT频道!　　1、是要

    来源 : 网络 2021-01-25 13:27:00 关键字 : GMAT逻辑 GMAT

更多内容

添加美研助教号

回复【GMAT】获取备考必看资料包

新东方美研备考资料
GRE录播课（全科班/单项班） GMAT6-8人直播VIP小班 托福直播精讲班（30天/60天）
更多>>
更多惊喜>>
更多>>
更多资料
我要
反馈 返回
首页
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10