OG 18 求解析 microbiologist

vicky9682

Microbiologist: A lethal strain of salmonella recently showed up in a European country, causing an outbreak of illness that killed two people and infected twenty-seven others. Investigators blame the severity of the outbreak on the overuse of antibiotics, since the salmonella bacteria tested were shown to be drug-resistant. But this is unlikely because patients in the country where the outbreak occurred cannot obtain antibiotics to treat illness without a prescription, and the country’s doctors prescribe antibiotics less readily than do doctors in any other European country.

Which of the following, if true, would most weaken the microbiologist’s reasoning?

• A Physicians in the country where the outbreak occurred have become hesitant to prescribe antibiotics since they are frequently in short supply.
• B People in the country where the outbreak occurred often consume foods produced from animals that eat antibiotics-laden livestock feed.
• C Use of antibiotics in two countries that neighbor the country where the outbreak occurred has risen over the past decade.
• D Drug-resistant strains of salmonella have not been found in countries in which antibiotics are not generally available.
• E Salmonella has been shown to spread easily along the distribution chains of certain vegetables, such as raw tomatoes.
  

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求问为什么D选项不对，感觉他就是在强调抗生素的原因啊，就是在削弱原文

Andy是头小毛驴

B？

Wang.

是B吧， D与原文无关，它只说了一些不通常使用抗生素的国家 并没有出现Drug-resistant strains of salmonella的情况，没有解释现象。逻辑线是 服用过多抗生素导致抗药性，并且排除了 医生开抗生素处方药 的可能性，那么找它因B

你最珍贵187

这个题的逻辑链是 P:这个国家的病人只能在有医生处方的情况下买到抗生素，而医生跟别的国家的医生比已经很少开抗生素了。C:疾病的严重跟抗生素没有关系。默认了一个假设：医生开的抗生素药就是人获取抗生素的唯一途径。B削弱了这个假设，吃有抗生素的东西也会有抗生素。我一开始也错选了D：没有抗生素的地方，S病没有抗药性。相当于加强了抗生素这个因素对S病肆虐的影响。
感觉很像削弱吧，但是即便滥用抗生素是S病抗药性的主要原因，又怎么样呢？microbiologist的观点就是在这个国家里，抗生素压根就没有滥用啊！！microbiologist并没有在质疑“抗生素滥用导致S病有了抗药性”这个道理，他只是说这个国家没有滥用抗生素,这个国家S病泛滥不是因为抗生素滥用。
很多人（其实就是我）排除D是因为认为，D意味着有抗生素的国家，S病就有抗药性。这是不一定的！有抗生素的国家如果不滥用的话，S病也不会有抗药性的。
欢迎交流

roxettekc

你最珍贵187 发表于 2018-11-2 15:16
这个题的逻辑链是 P:这个国家的病人只能在有医生处方的情况下买到抗生素，而医生跟别的国家的医生比已经很 ...

Mark一下！