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
20
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] The author most probably wants the readers to treat biocides with an attitude of_____.
选项
A、caution
B、trust
C、enthusiasm
D、criticism
答案
A
解析
第3段最后两句讨论生物杀灭剂的用处,其中最后一句中的but,dangerous和cancers等词说明作者认为要慎用这种杀灭剂。作者并没对杀灭剂全盘否定,只是说过量使用会引发危险,因此D不对。
转载请注明原文地址:https://tihaiku.com/zcyy/3414961.html
相关试题推荐
Friendsplayanimportantpartinourlives.Andalthoughwetaketheactof
Friendsplayanimportantpartinourlives.Andalthoughwetaketheactof
Friendsplayanimportantpartinourlives.Andalthoughwetaketheactof
Friendsplayanimportantpartinourlives.Andalthoughwetaketheactof
Friendsplayanimportantpartinourlives.Andalthoughwetaketheactof
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesin
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesin
Althoughthestigma(耻辱)onceassociatedwithmentalillnesshasgraduallygon
Althoughthestigma(耻辱)onceassociatedwithmentalillnesshasgraduallygon
Althoughthestigma(耻辱)onceassociatedwithmentalillnesshasgraduallygon
随机试题
Completethenotesbelow.WriteNOMORETHANTWOWORDSORANUMBERforeachansw
Theworldwideconsumptionofbakeryproductsisincreasing.Manypopulation
在支架上现浇预应力混凝土连续梁,其支架验算抗倾覆的稳定系数不得小于()。A
关于半刚性类基层.底基层组成材料技术要求,请回答以下问题。(1)半刚性基层、底基
抢救急性苯中毒时,错误的处理方法是A.给予维生素C B.脱去被污染的衣服 C
酮替芬平喘时的给药途径是A.直肠给药 B.静脉滴注 C.口服 D.肌内注射
1.对于中华民族文化,我们应坚持的正确态度是() (A)具体问题具体分
下列有关饮食治疗的说明,错误的是( )。A.是糖尿病最基本的治疗方法 B.饮
下列关于认股权证与股票看涨期权共同点的说法中,正确的是( )。A.两者行权后均
直方图的分布形状及分布区间宽窄,取决于质量特性统计数据的()。A.样本数量
最新回复
(
0
)