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Many people who fly at least occasionally have come down with a cold or the flu shortly after disembarking. Is the air in airbor
Many people who fly at least occasionally have come down with a cold or the flu shortly after disembarking. Is the air in airbor
admin
2009-05-09
37
问题
Many people who fly at least occasionally have come down with a cold or the flu shortly after disembarking. Is the air in airborne commercial jets【21】______? The Association of Flight Attendants (AFA), 【22】______which 42, 000 flight attendants with 27 airlines are represented, evidently thinks so. The organization claims that the incidence of air-quality-related diseases has【23】______among its members and demands that prompt actions be【24】______to improve the conditions in the airplane cabin.
A study the AFA【25】______in 1997 uncovered about 1, 000 self-reported incidents of headaches, dizziness and memory loss【26】______flight attendants and passengers. Some flight attendants were too ill to【27】______their safety duties, while others have been permanently disabled.
Because of airlines’ efforts to【28】______their expenses, cabin-air filters are not cleaned【29】______. The complaints of flight attendants do not always give【30】______to correct maintenance. Airlines turned to recycled air, 【31】______that they would reduce some of their costs. They are not required to put filters in. Airlines are【32】______great pressure to get their flights out【33】______. So they do not pay as much attention to systems that are not as【34】______to flight schedule and safety.
Recent research findings emphasize the concern that filters can【35】______engine chemicals into the cabin air. This may not happen【36】______every flight, but it is a persistent problem.
In a study published in October 1998 an investigation was made【37】______complaints of crew members【38】______air quality and health. More than half of the 200 subjects reported health problems they【39】______to cabin air. It was concluded that these health problems were consistent with【40】______harmful gases and substances.
【22】
选项
A、of
B、in
C、by
D、to
答案
C
解析
这里是由介词+关系代词which引导的定语从句,该句是被动语态,意为“27家航空公司的42000名空乘人员被AFA代表”,故选C。
转载请注明原文地址:https://kaotiyun.com/show/MfPd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
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公共英语四级笔试
公共英语(PETS)
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