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
About two-thirds of the world’s population is expected to live in cities by the year 2020 and, according to the United Nations,
About two-thirds of the world’s population is expected to live in cities by the year 2020 and, according to the United Nations,
admin
2023-03-07
66
问题
About two-thirds of the world’s population is expected to live in cities by the year 2020 and, according to the United Nations, approximately 3.7 billion people will inhabit urban areas some 10 years later. As cities grow, so do the number of buildings that characterize them: office towers, factories, shopping malls and high-rise apartment buildings. These structures depend on artificial ventilation systems to keep clean and cool air flowing to the people inside. We know these systems by the term "air-conditioning"
Although many of us may feel air-conditioners bring relief from hot, humid or polluted outside air, they pose many potential health hazards. Much research has looked at how the circulation of air inside a closed environment—such as an office building—can spread disease or expose occupants to harmful chemicals.
One of the more widely publicized dangers is that of Legionnaire’s disease, which first recognized in the 1970s. This was found to have affected people in buildings with air-conditioning systems in which warm air pumped out of the system’s cooling towers was somehow sucked back into the air intake, in most cases due to poor design. This warm air was, needless to say, the perfect environment for the rapid growth of disease carrying bacteria originating from outside the building, where it existed in liarmless quantities. The warm, bacteria-laden air was combined with cooled conditioned air and was then circulated around various parts of the building. Studies showed that even people outside such buildings were at risk if they walked past air exhaust
ducts
. Cases of Legionnaire’s disease are becoming fewer with newer system designs and modifications to older systems, but many older buildings, particularly in developing countries, require constant monitoring.
The ways in which air-conditioners work to "clean" the air can inadvertently cause health problems, too. One such way is with the use of an electrostatic precipitator, which removes dust and smoke particles from the air. What precipitators also do, however, is to emit large quantities of positive air ions into the ventilation system. A growing number of studies show that overexposure to positive air ions can result in headaches, fatigue and feelings of irritation.
Large air-conditioning systems add water to the air they circulate by means of humidifiers. In older systems, the water used for this process is kept in special reservoirs, the bottoms of which provide breeding grounds for bacteria and fungi which can find their way into the ventilation system. The risk to human health from this situation has been highlighted by the fact that the immune systems of approximately half of workers in air-conditioned office buildings have developed antibodies to fight off the organisms found at the bottom of system reservoirs. Chemical disinfectants, called "biocides", that are added to reservoirs to make them germ-free are dangerous in their own right in sufficient quantities, as they often contain compounds such as pentachlorophenol, which is strongly linked to abdominal cancers.
Finally, it should be pointed out that the artificial climatic environment created by air-conditioners can also adversely affect us. In a natural environment, whether indoor or outdoor, there are small variations in temperature and humidity. Indeed, the human body has long been accustomed to these normal changes. In an air-conditioned living or work environment, however, body temperatures remain well under 37° C, our normal temperature. This leads to a weakened immune system and thus greater susceptibility to diseases such as colds and flu.
The word "inadvertently" underlined in Paragraph 4 means _____.
选项
A、intentionally
B、accidentally
C、definitely
D、deliberately
答案
B
解析
inadvertently意为“无意地,非故意地”,故选B“非有意地,意外地”。同时排除A“故意地”、C“绝对地,毋庸置疑地”和D“故意地.成心地”。
转载请注明原文地址:https://kaotiyun.com/show/PXcD777K
本试题收录于:
CATTI三级笔译综合能力题库翻译专业资格(CATTI)分类
0
CATTI三级笔译综合能力
翻译专业资格(CATTI)
相关试题推荐
Inthepast20yearsalone,threecoronaviruseshavecausedmajordiseaseoutbreaks.FirstcametheoriginalSARSvirusin2002.
Nobodyeverproteststhatanelementaryschoolshouldbedescribedas"manned"insteadof"staffed,"butdaretosuggesta"men
Thinnerisn’talwaysbetter.Anumberofstudieshave【C1】________thatnormal-weightpeopleareinfactathigherriskofsomedi
[A]Besilly[B]Havefun[C]Expressyouremotions[D]Don’toverthinkit[E]Beeasilypleased[F]Notice
HarlanCobenbelievesthatifyou’reawriter,you’llfindthetime;andthatifyoucan’tfindthetime,thenwritingisn’tap
Despitehelpingtorecordevents,photoscoulddamageourmemories.Researchersfoundpeoplewhotakepictureshave【C1】________r
Canada’spremiers(theleadersofprovincialgovernment),iftheyhaveanybreathleftaftercomplainingaboutOttawaattheirl
[A]Usingapairofchargedparticles,groupleaderChristopherMonroeandhisteamplaceeachinavacuumandkeeptheminpo
Knowinghowtofitintoanofficewillcomein________formanygraduatejobs,soit’sagoodideatolookforopportunitiestos
A、Therearefourlevelsofclass.B、Itisaninventionofmodernsociety.C、Itisinfluencedbythefamilyonebelongs.D、There
随机试题
A.母乳B.鲜牛奶C.全脂奶粉D.羊奶E.炼乳含酪蛋白多,凝块大,难于消化
炙甘草是四逆汤中的
不属于子宫肌瘤临床表现的是
账务处理程序是()按照一定的形式和方法相结合的方式。
甲公司在筹建期间委托华东证券公司代理发行普通股3000万股,每股面值1元,按每股1.02元的价格发行。甲公司与华东证券公司约定,华东证券公司按发行收入的3%收取手续费,从发行收入中扣除,甲公司的资本公积科目余额为100万元,均是发行股票产生的溢价收入。收到
关于辐射的性质,下列叙述正确的有()。
()是指具有电脑功能的一种超微型传感器,它可以探测周围诸多环境参数,能够收集数据,进行适当计算处理,然后利用无线通信装置,将这些信息进行传送。
国际收支平衡表的四部分主要内容中,最基本的项目是()。
直线是力,曲线是美。自然形态的曲线是美的,而社会形态上不美的曲线,_______。填入画横线部分最恰当的一项是:
Whichofthefollowingadjectivesmaybestdescribethetoneofthistext?Thetextismainlyabout.
最新回复
(
0
)