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题库 / OG2017V-CR-136
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?
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.
Most office buildings with sick building syndrome were built between 1950 and 1990.
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.
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.
Office buildings with windows that can readily be opened are unlikely to suffer from sick building syndrome.
E：前提强调建筑物拥有相似的设计和通风系统，所以否定前提错误。
A只提供了一个fact 这类家具会产生有毒物质，但是明确在那些sick的建筑有这类家具 那些不sick的建筑没这些家具。
我这个问题应该用”相对most helps“来解释吗？
E 前提给出通风系统一样 这个不可以削弱文段
类比，CQ1
类比 相似性
类比推理
错选E： the passage only concerns the differences in air qulality ONLY among office buildings that were designed to prevent outside air from entering