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
Most people are aware that outdoor air pollution can damage their health, but many do not know that indoor air pollution can als
Most people are aware that outdoor air pollution can damage their health, but many do not know that indoor air pollution can als
admin
2011-01-01
41
问题
Most people are aware that outdoor air pollution can damage their health, but many do not know that indoor air pollution can also【67】health significantly. Environmental Protection Agency studies【68】that indoor levels of pollutants may be 2-5 times, and【69】more than 100 times, higher than outdoor levels.
There are many sources of indoor air pollution in any【70】. These include combustion (燃烧) sources, products for home cleaning and【71】, personal care, or hobbies; central heating and cooling systems and humidification【72】; and outdoor air pollution.
【73】effects may show up after a single exposure or【74】exposures. These include irritation of the eyes, nose, and throat, headaches, dizziness, and【75】. Such effects are usually short-term and【76】. Sometimes the treatment is simply【77】the person’s exposure to the source of the pollution,【78】it can be identified.【79】of some diseases may also show up soon after exposure to some indoor air pollutants.
Certain effects are similar to those from colds or other viral (病毒引起的) diseases,【80】it is often difficult to【81】if the symptoms are a result of exposure to indoor air pollution.【82】this reason, it is important to pay attention to the time and place the symptoms【83】. If the symptoms fade or go away when a person is away from home and return when the person returns,【84】should be made to identify indoor air sources that may be possible【85】. Some effects may be made worse by an【86】supply of outdoor air or from the heating, cooling, or humidity conditions prevalent in the home.
选项
A、so
B、because
C、but
D、although
答案
A
解析
本句句意为“有些症状跟感冒或者其他病毒引起的疾病的症状相似,______通常很难______这些症状是否是室内空气污染的结果”,前后应该是因果关系,故选so。
转载请注明原文地址:https://kaotiyun.com/show/TRy7777K
0
大学英语四级
相关试题推荐
A、Peoplejumphigher.B、Egyptiansbuiltpyramids.C、Scientistsexplorethespace.D、DaVincimadeplansfortransportation.D细节题
Withalotofpatiencewithoneself,mostpeople______(成功克服了文化冲击).
A、Insectsarearoundlongbeforepeoplewere.B、Therearefarmoreinsectsthantherearehumans.C、Insectsleadahappierlife
A、Thetwopeoplecanlearnabouteachother’slikesanddislikes,B、Thetwopeoplecanhaverimetodecideiftheyareagoodma
A、Gothroughahealthcheck,B、Takelittleluggagewiththem.C、Arriveearlyforboarding.D、Undergosecuritychecks.B从题目选项可以得知
A、HowIndonesiacametobeinhabited.B、HowthePolynesianislandscametobeinhabited.C、HowthePolynesianpeopletraveledfr
A、Internationalchildren’sprojects.B、Socialandenvironmentalprojects.C、Projectsforpeoplewithnomoney.D、Projectsinvolv
Importantpeopledon’toftenhavemuchfreetimeas______(他们的工作占用了他们的全部时间).
随机试题
甲乙为高中同学,甲比乙大一岁并同时考上大学,甲为庆祝,表示要将自己的一台笔记本电脑送给乙。甲父得知此事后很生气,但未明确表态。甲于自己18岁生日宴会结束的次日凌晨,送乙回家途中,将笔记本电脑交给了乙。一周后,甲父告知乙,电脑你玩几天就行,过几天甲还要去学校
文件生命周期理论
民主集中制是我国的根本政治制度。()
1990年8月,某远洋客轮上发生一起军团病暴发流行。船离开港口时载有350名乘客、50名船员。8月1日前的一周内,在一次风暴中有1/7的乘客遇难。8月份第一周中,船上有30人发生军团病,其中一半很快死亡。随后的一周内又有20人发病,但无死亡。假设症状持续一
机电工程中,常用的起重机主要有( )。
(1)在D盘根目录下建立M1和M2文件夹。(2)在M1下建立一个名为EXAM.TXT文件,内容为“会计电算化网络考试”。(3)将M1中的文件EXAM.TXT复制到M2中。(4)将M2中EXAM.TXT更名为KAOSHI.TXT。(5
下列属于入境货物报检方式的有( )。
活期储蓄存款存入时,应填写()。
Ifourbrainswerecomputers,we’dsimplyaddachiptoupgradeourmemory.Thehumanbrain,therefore,ismore【M1】______comple
MostAmericansspendmostoftheirleisuretimewiththemassmedia.Inaddition,mostofushear,see,orreadsomeofthemedi
最新回复
(
0
)