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 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.
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 used of asthma deaths, and the use of bronchial inhalers are the only possible explanations of the increased death rate due to asthma.
选e..why not a?
谢谢!作者: zjhzkingsam 时间: 2011-8-22 21:24
E is the answer. There are only three choices for asthma death,
two of which were eliminated. The only one left standing is the use
of bronchial inhalers.
C is wrong because it is not an assumption for the conclusion to
hold. If you negate it, i.e., bronchial inhalers is safe to use, the
conclusion that the use of bronchial inhalers causes asthma death
still holds. So answer choice C has no impact on the conclusion of
the argument.作者: zjhzkingsam 时间: 2011-8-22 21:25
A has no impact on the conclusion.作者: haoye12321 时间: 2011-8-23 06:30
Why?When C is neglected,I think it will weaken the conclusion.作者: zjhzkingsam 时间: 2011-8-23 19:45
Weaken is not enough. You have to make the conclusion WRONG.作者: zjhzkingsam 时间: 2011-8-23 19:45
If bronchial inhaler is safe, the cause of increased deaths can still be the use of bronchial inhalers.作者: haileywang 时间: 2011-8-24 06:37
I carefully noticed the E choice.
There are 4 choices in E.
Increased urban pollution,
improved recording of asthma deaths,
and the used of asthma deaths,
and the use of bronchial inhalers
Therefore, I exclude E because even if we exclude the first 2 reasons, we still have 2 . One is the used of astham deaths (I cannot understand this phrase, however.), and the other is the use of bronchinal inhalers.
Could you help me to make it clear? I exclude E, then turning to Choice C .作者: xyxxyxxyx 时间: 2011-8-24 20:18
