首页
登录
职称英语
Although many of us may feel air-conditioners bring relief from hot, humid o
Although many of us may feel air-conditioners bring relief from hot, humid o
游客
2024-02-02
14
管理
问题
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 movement of air inside a closed environment—such as an office building—can spread disease or expose people in the building to harmful chemicals.
One of the more widely publicized dangers is that of Legionnaire’s disease, which was 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(通风口), in most cases due to poor design. The warm air, filled with bacteria, 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 pipes.
Large air-conditioning systems add water to the air they circulate by means of humidifiers(湿度调节器). In older systems, the water used for this process is kept in special reservoirs, the bottoms of which provide breeding grounds for bacteria which can find their way into the ventilation(通风)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 the ability to fight off the organisms found at the bottom of system reservoirs. But chemicals called "biocides" are added to reservoirs to make them germ-free, and they are dangerous in their own right in sufficient quantities, as they often contain compounds strongly linked to cancers.
Finally, it should be pointed out that the artificial climatic environment created by air-conditioners can also 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℃, our normal temperature. This leads to a weakened immune system and thus greater exposure to diseases such as colds and flu. [br] In the old air-conditioned systems, bacteria first develop _____.
选项
A、in the reservoirs
B、in the ventilation system
C、in the humidifiers
D、in the air intake
答案
A
解析
本题考查复合句的理解。只要明白第3段第2句这个非限制性定语从句中的the bottoms of which中的which是指上文的reservoirs,问题就不难解决了。
转载请注明原文地址:https://tihaiku.com/zcyy/3414959.html
相关试题推荐
Friendsplayanimportantpartinourlives.Andalthoughwetaketheactof
Friendsplayanimportantpartinourlives.Andalthoughwetaketheactof
Friendsplayanimportantpartinourlives.Andalthoughwetaketheactof
Friendsplayanimportantpartinourlives.Andalthoughwetaketheactof
Friendsplayanimportantpartinourlives.Andalthoughwetaketheactof
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesin
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesin
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesin
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesin
Althoughthestigma(耻辱)onceassociatedwithmentalillnesshasgraduallygon
随机试题
TheLostArtofListeningA)"Whywon’theevenlistentomyidea?","Why
HowmuchwillLenovopayincashtopurchaseIBM?[br][originaltext]Lenovo
A.零级 B.一级 C.二级 D.三级
一般情况下,国家公务员的养老保险待遇是()。A.享有专门的养老保险制度保障,条
下列关于资产的折旧或摊销的处理中,错误的是()。A、生产性生物资产的支出,准予
女,24岁,孕34周,既往体健。下肢水肿,头痛,咳嗽,气短1周,血压165/12
A.异丁苯丙酸 B.消炎痛 C.乙酰水杨酸 D.扑热息痛 E.炎痛喜康布
依据变电运维通用管理规定,运维人员每半年开展安全工器具清查盘点,确保()、()
求助者:我是家里的老二,有一个姐姐一个妹妹。我跟父母的感情非常好,一直和他们住在
大黄蛰虫丸方中君药为A.熟大黄、土鳖虫(炒) B.熟大黄、水蛭(制) C.熟
最新回复
(
0
)