Lsat-2-2-22

Question:

Despite improvements in treatment for asthma, the death rate form this disease has doubled during the past decade from its previous rate. Two possible explanations for this increase have been offered. First, the recording of deaths due to asthma has become more widespread and accurate in the past decade than it had been previously. Second, there has been an increase in urban pollution. However, since the rate of deaths due to asthma has increased dramatically even in cities with long-standing, comprehensive medical records and with little or no urban pollution, one must instead conclude that the cause of increased deaths is the use of bronchial inhalers by asthma sufferers to relieve their symptoms.

22. Each of the following , if true, provides support to the argument EXCEPT:

(A) Urban populations have doubled in the past decade.

(B) Records of asthma deaths are as accurate for the past twenty years as for the past ten years.

(C) Evidence suggests that bronchial inhalers make the lungs more sensitive to irritation by airborne pollen.

(D) By temporarily relieving the symptoms of asthma, inhalers encourage sufferers to avoid more beneficial measures.

(E) Ten years ago bronchial inhalers were not available as an asthma treatment.

答案A,请问B作何解?

谢谢，lawer_1的 回复。

是不是说，However, since the rate of deaths due to asthma has increased dramatically even in cities with long-standing, comprehensive medical records and with little or no urban pollution, one must instead conclude that the cause of increased deaths is the use of bronchial inhalers by asthma sufferers to relieve their symptoms,  However 后面的部分才是结论。

而B选项是否定第一种解释的，反过来，就是support结论的咯。

然而，

23. Which one of the following is an assumption on which the argument depends?

(A) Urban pollution has not doubled in the past decade.

(B) Doctors and patients generally ignore the role of allergies in asthma.

(C) Bronchial inhalers are unsafe, even when used according to the recommended instructions.

(D) The use of bronchial inhalers aggravates other diseases that frequently occur among asthma sufferers and that often lead to fatal outcomes even when the asthma itself does not.

(E) Increased urban pollution, improved recording of asthma deaths, and the use of bronchial inhalers are the only possible explanations of the increased death rate due to asthma.

答案E, 好像又说improved recording of asthma deaths与the use of bronchial inhalers

一样是可能的解释哦，后者也并非一个结论。请XDJM们指点。

原文的逻辑是：ASTHMAS的死亡率过去十年升高（比过去二十年），有两种可能的原因产生这种升高，但是，这两种解释是不对的。所以（结论），第三种原因是对的。

22。任何否定那两种原因，或支持第三个原因都是支持原文的推理。该题除A外，都起这个作用，故A为答案。

23。如果还有三个原因外的其他原因，那末即使否定两个原因，还有可能是三个原因外的其他原因，还是推不出是第三个原因是对的，故必须排除这种可能性，即只有三种原因。E