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
Although many of us may feel air-conditioners bring relief from hot, humid or polluted outside air, they pose many potential hea
Although many of us may feel air-conditioners bring relief from hot, humid or polluted outside air, they pose many potential hea
admin
2016-10-07
35
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.
The fact that about half of workers developed the ability to fight off the bacteria may_____.
选项
A、relieve people’s worry about the danger caused by the bacteria
B、help people find an effective way to get rid of the bacteria
C、reflect the serious danger brought by the bacteria
D、cause serious disease such as cancers to people
答案
C
解析
事实细节题。本题考查被动语态长句的理解。在第3段第3句中,关键词是highlight,选项C是对原句主谓部分的近义替换。选项A和B在文中皆无提及,选项D是过度使用生物杀灭剂的后果,与本题干的情况无关。
转载请注明原文地址:https://kaotiyun.com/show/7vY7777K
0
大学英语四级
相关试题推荐
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesinknowledge,therehasbeennocorrelativeincreasein
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesinknowledge,therehasbeennocorrelativeincreasein
OliviaPedersenthoughttheNissanLeafparkedoutsideherfavoritelunchspotnearEmoryUniversity,mustbehers.Butshecoul
OliviaPedersenthoughttheNissanLeafparkedoutsideherfavoritelunchspotnearEmoryUniversity,mustbehers.Butshecoul
OliviaPedersenthoughttheNissanLeafparkedoutsideherfavoritelunchspotnearEmoryUniversity,mustbehers.Butshecoul
OliviaPedersenthoughttheNissanLeafparkedoutsideherfavoritelunchspotnearEmoryUniversity,mustbehers.Butshecoul
BullyingandChildrenA)Whatyoursonisdescribingisbullying,plainandsimple.Althoughitislateintheschoolyear,yous
随机试题
具有益气生津(养阴)功效的方剂是( )
A、1/6B、1/4C、1/3~1/2D、2/3E、2/5乳婴儿的中药用量为成人用量的
A、天冬B、莪术C、姜黄D、西红花E、苏木对光透视有不透明木心的药材为
A、黄色泡沫状分泌物B、白色豆腐渣样分泌物C、脓性分泌物D、蛋清样分泌物E、血性分泌物慢性宫颈炎()
对于中、小型卧式离心泵或混流泵机组,当水源或进水池水位变幅小于水泵的有效吸上高度H效吸(水泵的允许吸上真空高度—泵轴线至泵房地坪的垂直距离),且建站处地基的地质条件较好,地下水位低于泵房基础时可建()。
下列有关软土地基的特点,描述错误的有()。
红利支付导致公司借款需求的原因在于()。
我国在部分城市试验使用乙醇作为汽车燃料来替代汽油,以降低汽油消耗,减少石油进口.根据以上材料,完成下列问题。用乙醇替代石油产品有广阔的前景,其主要原因是()。
我国已经成为全球最大的留学生输出国之一,出国留学人数年平均增长率超过25%,2011年累计出国留学人数比1978年规模扩大了375倍。留学群体低龄化趋势明显,2010年我国出国留学高中及以下学历学生占当年留学总人数的19.8%,据2011年美国统计数字显示
奥斯陆大学社会人类学家阿奇蒂说,挪威人特别______平等,______特权,富翁的孩子跟泥瓦匠的孩子也应该上同样的学校;他们认为自己的生活品质在全世界最高,而平等意识则是生活品质的______构成。因此,至少在挪威人的观念里,炫富是现代社会中日显威胁的第
最新回复
(
0
)