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Many office buildings designed to prevent outside air from entering have been sh
Many office buildings designed to prevent outside air from entering have been sh
游客
2025-02-25
9
管理
问题
Many office buildings designed to prevent outside air from entering have been shown to have elevated levels of various toxic substances circulating through the air inside, a phenomenon known as sick building syndrome. Yet the air in other office buildings does not have elevated levels of these substances, even though those buildings are the same age as the "sick" buildings and have similar designs and ventilation systems.
Which of the following, if true, most helps to explain why not all office buildings designed to prevent outside air from entering have air that contains elevated levels of toxic substances?
选项
A、Certain adhesives and drying agents used in particular types of furniture, carpets, and paint contribute the bulk of the toxic substances that circulate in the air of office buildings.
B、Most office buildings with sick building syndrome were built between 1950 and 1990.
C、Among buildings designed to prevent outside air from entering, houses are no less likely than office buildings to have air that contains elevated levels of toxic substances.
D、The toxic substances that are found in the air of "sick" office buildings are substances that are found in at least small quantities in nearly every building.
E、Office buildings with windows that can readily be opened are unlikely to suffer from sick building syndrome.
答案
A
解析
Argument Evaluation
Situation Many office buildings designed to prevent outside air from entering have elevated levels of toxic substances in their interior air, but other such buildings similar in age, design, and ventilation do not.
Reasoning What would help to explain the difference in air quality among buildings similar in age, design, and ventilation? If office buildings are designed to prevent outside air from entering, toxic substances emitted into the interior air might not be ventilated out quickly, and thus might become more concentrated inside the building. But if such toxic substances are not emitted into a building’s interior air in the first place, they will not become concentrated there, even if the building is poorly ventilated. So any factor that suggests why toxic substances are emitted into the interior air of some buildings but not others of similar age and design would help to explain the difference in the buildings’ air quality.
A Correct. Some buildings may have these types of furniture, carpets, and paint, while other buildings similar in age, design, and ventilation do not.
B Since all these buildings were built during the same period, this does not help to explain the difference in air quality among buildings similar in age.
C The passage concerns air quality in office buildings only, not in houses.
D This does not help to explain why these toxic substances are more concentrated in some office buildings than in others.
E The passage concerns the differences in air quality only among office buildings that were designed to prevent outside air from entering.
The correct answer is A.
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