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
2022-06-18
55
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 harmless 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/ZTuO777K
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
TheEarlyHistoryofMotionPicturesP1:Thetechnologythatmadepossibletheprojectionandexhibitionofphotographedmoving
TheEarlyHistoryofMotionPicturesP1:Thetechnologythatmadepossibletheprojectionandexhibitionofphotographedmoving
_____commonusageamongeconomists,theterm"naturalrate"ismisleading.
Howdoestheprofessordevelopthetopicoftheviolinfamily?Choosetwoanswers.
Whydoesthestudentspeakwiththeman?
Beforepaperwasinvented,peoplewroteon______couldobtain:silk,palmleaves,orclaytablets.
Hewasamanofmeanunderstanding,littleinformation,anduncertaintemper.
AirPollutionandtheImportanceofTreesAirpollutionisnotapopularsubject,whichiswhylittlenoticehasbeentaken
Everyenterprisereliesupontheuniqueskillsetsandtalentseachindividualcanoffer.However,thereisaneedtodirectthe
Thiscolorlessgasiscalledoxygen,whofiresburnmuchbetter.
随机试题
王某与李某订立买卖合同,欲将王某的彩电转让给李某,但未交付。后王某又与陈某订立买卖合同,并交付了彩电。此时取得彩电的所有权的是()
A.100℃加温2~2.5小时B.用0.3%~0.5%甲醛处理C.56℃加热30分钟D.-20℃反复冻融E.灭菌后加入0.5%~1.0%氯化钙溶液制备鞭毛抗原选择
超前锚杆、小导管支护宜与()钢拱架配合使用,沿开挖轮廓线,以一定的外插角,向开挖面前方设置。
需求的()是指一定时期内一种商品需求量的相对变动对该商品价格的相对变动的反应程度,或者说价格变动1%时需求量变动的百分比,它是商品需求量变动率与价格变动率之比。
甲公司为增值税一般纳税人,适用的增值税税率为16%,该公司主营业务为经销W产品并按实际成本核算。W产品的售价中不包含增值税,确认收入的同时结转销售成本。2019年该公司发生的经济业务如下:(1)3月1日,收到乙公司预付货款1100万元。3月2日,向乙公司
公安政策是由()制定的。
关于天文,说法错误的是()。
已知过抛物线焦点的直线与抛物线交于A,B,则以AB为直径的圆与抛物线准线的公共点的数目为[].
查询15天前参加工作的记录的准则是()。
SophyBrentcametovisitmenearlyeveryday.She【C1】______meunbearablymostofthetime.She【C2】______.incessantlyandnever
最新回复
(
0
)