60.Since the routine use of antibiotics can give rise to resistant bacteria capable of surviving antibiotic environments, the presence of resistant bacteria in people could be due to the human use of prescription antibiotics. Some scientists, however, believe that most resistant bacteria in people derive from human consumption of bacterially infected meat.
Which of the following statements, if true, would most significantly strengthen the hypothesis of the scientists?
(A) Antibiotics are routinely included in livestock feed so that livestock producers can increase the rate of growth of their animals.
(B) Most people who develop food poisoning from bacterially infected meat are treated with prescription antibiotics.
(C) The incidence of resistant bacteria in people has tended to be much higher in urban areas than in rural areas where meat is of comparable quality.
(D) People who have never taken prescription antibiotics are those least likely to develop resistant bacteria.
(E) Livestock producers claim that resistant bacteria in animals cannot be transmitted to people through infected meat.
A is the best answer.
If livestock are routinely fed antibiotics, as choice A states, meat from livestock is likely to contain the resistant bacteria, since any routine use of antibiotics can result in resistant bacteria. Thus, choice A is the best answer.
How cases of food poisoning are treated (choice B) fails to indicate whether the infecting bacteria are resistant bacteria.
Choice C suggests that meat consumption is not the primary culprit for the high incidence of resistant bacteria.
Choice D tends to support the competing hypothesis that prescription antibiotics are responsible.
Choice E asserts that livestock farmers claim that the hypothesis is false, but it provides no basis for evaluating the truth of this claim.
1）我不明白A, the hypothesis说：科学家认为人类体内的resistant bacteria是因为吃了被细菌感染的肉；ets对A的解释说: livestock吃了antibiotics--〉livestock体内含resistant bacteria--〉resistant bacteria转移到人类体内
问题在于虽然两种说法的共同点在于人类体内的resistant bacteria都是来自livestock，但这中间有差异,就是 “被细菌感染的肉 ”的食用而产生resistant bacteria与resistant bacteria的转移
2）不明白ets对B的解释,常识是细菌感染产生resistant bacteria，infecting bacteria 与 resistantbacteria是因果关系，怎么现在被相提并论？而且从题意，B是削弱，怎么似乎ets认为是无关
望牛牛们帮忙解惑！ | 
