feifei-79--请教

Despite improvements in treatment for asthma, the death rate from 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 the deaths due to asthma has become more widespead and accurate in the past decade than it had been previously.Second, there has been an increase in urban population.However,since the rate of the deaths due to asthma has increased dramatically even in cities with long-standing,comprehensive medical records and with little or no urban population.One must instead conclude that the cause of increased deaths is the use of bronchial inhalers by asthma sufferers to their symptoms.

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

     A.   Urban population 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 population, improved recording of asthma deaths, and the use of bronchial inhalers are the only possible explanation of the increased death rate due to asthma.

我做这题,自己觉得C,D,E选项好象都可以.根据ETS的assumption题的取非法:

conclusion:the cause of increased deaths is the use of bronchial inhalers by asthma sufferers.

C:取非:bronchial inhalers are safe, so can't reach the conclusion,所以我觉得正确.

D:取非:bronchial inhalers没有恶化asthma本身及其它导致致命的并发症,so can't reach the conclusion,所以正确.

E:取非也对

我知道我的分析肯定有漏洞,但是我真的被这题搞晕了,希望大家提出宝贵的解题思路,指点迷津!

C肯定不行，它没提到bronchial inhalers与 asthma 的关系。无关选项

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.

conclusion:One must instead conclude that the cause of increased deaths is the use of bronchial inhalers by asthma sufferers to their symptoms.

这样看就应该不行了吧。

所以只有E，排除了他因的可能性，所以正确。