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
30
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 (免疫系统) 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
事实细节题。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/3414054.html
相关试题推荐
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesin
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesin
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesin
Althoughthestigma(耻辱)onceassociatedwithmentalillnesshasgraduallygon
Althoughthestigma(耻辱)onceassociatedwithmentalillnesshasgraduallygon
AlthoughtheOlympicCharter,theofficialconstitutionoftheOlympicmovem
AlthoughtheOlympicCharter,theofficialconstitutionoftheOlympicmovem
AlthoughtheOlympicCharter,theofficialconstitutionoftheOlympicmovem
Althougheachbabyhasanindividualscheduleofdevelopment,generalpatter
Althougheachbabyhasanindividualscheduleofdevelopment,generalpatter
随机试题
[originaltext]W:Haveyoueverbeenchasedbyadog,Keith?M:No,Ihaven’t,i
[originaltext]M:So,Kathy,youarethemanageroftheCanfordStreetPark.Tel
WhenNicholasPavewasthreeyearsold,heateapieceofcakeataparty.W
Britain’sredphoneboxeshavebecomeoutofdateintheageofthemobile.
TheBeautyAdvantage[A]Mostofushaveheardthestory
TheMidwestisAmerica′smostimportant
糖粉与糊精是颗粒剂制备中常用的辅料,其与稠膏比例一般为() A稠膏:糖粉:糊
周老师在某地一所高级中学负责招生录取工作,在招生录取工作中,周老师发现学生张晓的
统计表明,某国的火车事故多发生在南部地区,因此在北部地区坐火车更安全。以下哪项最
2×16年至2×19年,甲公司发生的与A仓库相关的交易或事项如下: 资料一:2
最新回复
(
0
)