首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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
2019-01-25
59
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【C1】______? The Association of Flight Attendants (AFA),【C2】______which 42, 000 flight attendants with 7 airlines are represented, evidently thinks so. The organization claims that the incidence of air-quality-related diseases has【C3】______among its members and demands that prompt actions be【C4】______to improve the conditions in the airplane cabin.
A study the AFA【C5】______in 1997 uncovered about 1, 000 self-reported incidents of headaches, dizziness and memory loss【C6】______flight attendants and passengers. Some flight attendants were too ill to【C7】______their safety duties, while others have been permanently disabled.
Because of airlines’ efforts to【C8】______their expenses, cabin-air filters are not cleaned【C9】______. The complaints of flight attendants do not always give【C10】______to correct maintenance. Airlines turned to recycled air,【C11】______that they would reduce some of their costs. They are not required to put filters in. Airlines are【C12】______great pressure to get their flights out【C13】______. So they do not pay as much attention to systems that are not as【C14】______to flight schedule and safety.
Recent research findings emphasize the concern that filters can【C15】______engine chemicals into the cabin air. This may not happen【C16】______every flight, but it is a persistent problem.
In a study published in October 1998 an investigation was made【C17】______complaints of crew members【C18】______air quality and health. More than half of the 200 subjects reported health problems they【C19】______to cabin air. It was concluded that these health problems were consistent with【C20】______harmful gases and substances.
【C15】
选项
A、enclose
B、block
C、introduce
D、detect
答案
C
解析
enclose(用墙、篱笆等)把…围起来;block堵塞;introduce介绍,传入,引进;detect发现,侦查。根据前面的“filters”以及后面的“engilie chemicals into the cabin air”可以推断出,此处表达的是“过滤器能将发动机中的化学物质传人座舱空气中”,故选C。
转载请注明原文地址:https://kaotiyun.com/show/t7Rd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
HowmanypeopleworldwidehavebeeninfectedwithHIVsincethestartoftheepidemic?
HowmanypeopleworldwidehavebeeninfectedwithHIVsincethestartoftheepidemic?
61)PeopleintheUnitedStatesinthenineteenthcenturywerehauntedbytheprospectthatUnprecedentedchangeinthenation’s
61)PeopleintheUnitedStatesinthenineteenthcenturywerehauntedbytheprospectthatUnprecedentedchangeinthenation’s
61)PeopleintheUnitedStatesinthenineteenthcenturywerehauntedbytheprospectthatUnprecedentedchangeinthenation’s
Inoneverylongsentence,theintroductiontotheU.N.Charterexpressestheidealsandthecommonaimsofallthepeoplewhose
Inoneverylongsentence,theintroductiontotheU.N.Charterexpressestheidealsandthecommonaimsofallthepeoplewhose
Therehasbeenadiscussionrecentlyontheissueofchallengeinanewspaper.Somepeoplethinkchallengeisakindofimpetus,
Broadlyspeaking,theEnglishmanisaquiet,shy,reservedpersonwhoisfully【21】______onlyamongpeopleheknowswell.In
随机试题
审美意象是用来表达某种抽象的观念或者哲理的艺术形象,它是艺术家在构思过程中,将自己的审美情感、审美认识与客观的事物相融合,并以一定的艺术表达方式呈现出来的内心视像。根据上述定义,下列不属于审美意象的是:
简述证据概念的基本特性。
事物发展的根本原因在于
患儿,男,6岁。1天前突发高热,体温达39℃,伴有咽痛、吞咽痛。今晨发现耳后、颈部及上胸部出现分布均匀的丘疹,舌头肿胀,呈杨梅舌。正确的护理措施是()。
港航工程大体积混凝土施工中的防裂措施包括()。
我国企业编制的利润表的基本格式属于()。
合同中的下列免责条款,有效的是()。
A.中线B.瞳孔连线C.口角线D.唇高线E.唇低线与确定平面有关的线是()。
通信部队的士兵学习了不少步兵战术,赵洪是通信部队的士兵,所以他也学习了不少步兵战术。以下哪项与上述论述最为相似?
Chronicinsomniaisamajorpublichealthproblem.Andtoomanypeopleareusing【C1】______therapies,evenwhilethereareafew
最新回复
(
0
)