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  3. In the workplace, influenza is typically spread by infected individuals to others with whom they work in close quarters. A new m

In the workplace, influenza is typically spread by infected individuals to others with whom they work in close quarters. A new m

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问题 In the workplace, influenza is typically spread by infected individuals to others with whom they work in close quarters. A new medication that suppresses the symptoms of influenza therefore will actually increase the number of influenza cases, because this medication will allow people who would otherwise be home in bed to return to work while infected. Which of the following, if true, most seriously challenges the prediction?
选项 A、Coughing, a symptom of influenza that the new medication suppresses, is a primary mechanism in the spread of this illness.
B、Some medications that are used to suppress symptoms of influenza are also used by many people to treat symptoms that are caused not by influenza but by other illnesses.
C、Many workers who now remain at home when infected with influenza do so because the symptoms of influenza prevent them from performing their jobs effectively.
D、Most adults who are immunized against influenza in order to avoid being infected are over 65 years old and retired and thus do not work outside the home.
E、Symptoms of an illness are often the body’ s means of curing itself of the illness, and therefore suppression of symptoms can prolong the illness that causes them.
答案A
解析 流行性感冒具有传染性，它主要通过传染的方法使其他的人感染，因此对本题最后的预测构成反对，就要找一选项说明新药能抑制感冒的传染性。(A)选项说明新药抑制了感冒传染的主要渠道——咳嗽，从而反对了卧床病人返回工作后会使患感冒的人数增加的推测。(B)和(D)都是无关选项；至于(C)，本题并不是要解释为什么工人们在患流感后会呆在家中，所以(C)不对；本文推理中并未涉及suppression of symptom，因此(E)也是不对的。
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