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题库 / GMATLA-CR-101
Lofgren's disease has been observed frequently in commercially raised cattle but very rarely in chickens. Both cattle and chickens raised for meat are often fed the type of feed that transmits the virus that causes the disease. Animals infected with the virus take more than a year to develop symptoms of Lofgren's disease, however, and chickens commercially raised for meat, unlike cattle, are generally brought to market during their first year of life.
Which of the following is most strongly supported by the information provided?
The virus that causes Lofgren's disease cannot be transmitted to human beings by chickens.
There is no way to determine whether a chicken is infected with the Lofgren's disease virus before the chicken shows symptoms of the disease.
A failure to observe Lofgren's disease in commercial chicken populations is not good evidence that chickens are immune to the virus that causes this disease.
An animal that has been infected with the virus that causes Lofgren's disease but that has not developed symptoms cannot transmit the disease to an uninfected animal of the same species.
The feed that chickens and cattle are fed is probably not the only source of the virus that causes Lofgren's disease.
B肯定是错的 因为题目知识说了几个facts
①发病的症状得一年之后才可以显现
②鸡一年的时候就被杀了
所以只能得出结论：通过看症状是不能判断这个鸡有没有生病的 但是不能说没有其他方法去检验
B选项为啥不行啊？
同问，呵呵
仔细考虑一下，B还是走的远了点，根据题目提供的信息，这种病毒在鸡身上能不能有其他的检测方法，并不知道，但是鸡虽然没有表现出症状，并不代表鸡身上没有这种病毒
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文章结论是，鸡之所以看不出染病是因为不到一年就被屠宰了，所以看不出来有没有得病。
B讨论是否有方法能够检测出疾病。 题目讨论的是看起来鸡不得病的原因，B讨论的是检测疾病的方法，不是同一件事情，所以不选。
选反了
Which of the following is most strongly supported by the information provided? 所提供信息最支持下面哪个
论句：Lofgren's disease has been observed frequently in commercially raised cattle but very rarely in chickens.
B 选项加强论句
c 是原文得出的推理
这也太绕了，错选了B……题目问的不是加强，而是忠于原文
b是增去原文的
c是原文可以得出的结论
我tm以为是增强题………………
文章说的是，XX病在牛上很常见，鸡里很少见，但是牛和鸡都是吃同一种很容易带来XX细菌的饲料。这个病的发展需要一年以上的时间，鸡一般养不到一年就到市场上去了。
提问的方式很tricky，是问，文章最能给哪个选项提供支撑，而不是，哪个选项最能加强文章。B是加强文章的，而非被文章加强。
For B, the question stems say the disease is rarely OBSERVED in chicken. 'not being observed' is not equal to 'no way to determine'.
逻辑链：牛和鸡都吃带病毒的东西--->这个病1年后发病，而鸡1年不道就杀了--->牛得病;鸡不得（第一句话）
题目是问哪个选项被原文支持，归纳总结题，忠实于原文
ABDE的信息，原文没有说过；
C：逻辑链的flaw在于，认为鸡没有symptom就没有感染，但其实是检测不出来。