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
A、To let out clean gas. B、To take in harmful gas. C、To use various plants. D、To let the air flow freely. C短文末句明确提到,使空气清新的最有效方法就是
A、To let out clean gas. B、To take in harmful gas. C、To use various plants. D、To let the air flow freely. C短文末句明确提到,使空气清新的最有效方法就是
admin
2018-10-16
44
问题
For years scientists have been worried about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse. Indoor air pollution can cause a person to feel tired, to suffer eye-pain, headache and other problems. Some pollutants can cause breathing disorders, diseases of blood and even cancer. Most scientists agree that every modern house has some kind of indoor pollution. People began to notice the problem in the early 1970s. When builders began making houses and offices, they did not waste energy. To do this they built buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases. As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for buildings—green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb or take in the pollutants. In exchange the plant lets out oxygen through its leaves and through its tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square meters of space. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants.
13 According to the speaker, what problem may indoor air pollution bring to people?
14 What causes the indoor air pollution according to the speaker?
15 What is the most effective way to clean the air?
选项
A、To let out clean gas.
B、To take in harmful gas.
C、To use various plants.
D、To let the air flow freely.
答案
C
解析
短文末句明确提到,使空气清新的最有效方法就是使用各种植物,因此C正确。
转载请注明原文地址:https://kaotiyun.com/show/DAH7777K
0
大学英语六级
相关试题推荐
PeoplewhospendalotoftimesurfingtheInternetaremorelikelytoshowsignsofdepression,BritishscientistssaidonWedn
Internationaltradefairshavebecomeextremelyimportantvenuesforconductingbusiness,yetveryfewdomesticallybasedsales
AstudyconductedbyanAustralianscienceagencyhasdiscoveredsignsthatthecountry’sancientAboriginesmayhavebeenthew
AmericansEugeneFama,LarsPeterHansenandRobertShillerwontheNobelPrizeforeconomicsonMondayfordevelopingmethodst
AmericansEugeneFama,LarsPeterHansenandRobertShillerwontheNobelPrizeforeconomicsonMondayfordevelopingmethodst
A、Swedish.B、Portuguese.C、Chinese.D、Thai.A细节题。根据短文中TherearelinkstomaterialstranslatedintoSpanish,Portuguese,Chinesean
A、Topreparefortheworst.B、Tosetacleargoal.C、Tododiversifiedinvestments.D、Toinvestforalongterm.D细节题。对话中提到Yous
A、Thefish.B、Thesugar.C、Thecheese.D、Theflour.D本题考查原料。对话中提到该健康小食是把鱼切碎后,加入调味剂给面粉一些品味。只有这样,才能尝到美味。
A、Becauseitcosts$77billiontodevelopfurther.B、Becauseitevenputsdatainofflinedevicesindanger.C、Becauseitaims
A、Visitthestories’settingplaces.B、Lookforallthedetailsaboutthestories.C、Haveafurthertalkwithpersonsinvolved.
随机试题
“若阙地及泉,隧而相见,其谁曰不然?”(《左传·郑伯克段于鄢》)中的“其”字是用来加强____________语气的助词。
下列对于秦朝的刑罚适用原则说法错误的是:
下列账户中,期末结转无余额的账户有()。
某股份有限公司采用移动加权平均法计算发出材料的实际成本,并按成本与可变现净值孰低法对期末存货计价。该公司2001年12月1日甲种材料的结存数量为200千克,账面实际成本为40000元;12月4日购进该材料300千克,每千克单价为180元(不含税,下同);
【案例】 甲公司与乙纺织厂签订一份买卖合同,合同规定由乙纺织厂向甲公司供应普通衬衫1万件,货款10万元,并贴上由甲公司提供的某名牌衬衫厂的商标。甲公司为此开具一张10万元的汇票给乙纺织厂,乙纺织厂随后将该汇票背书转让给个体户张某用以支付购买粮食等原料
下列各项中,通常需要注册会计师运用职业判断的有()。(2017年)
发生安全事故时,物业服务企业在采取应急措施的同时,应当及时向有关()报告。
态度考评的重点是()。
如图所示,A、B两球完全相同,质量均为m,用两根等长的细线悬挂在升降机的天花板的O点,两球之间连着一根劲度系数为k的轻质弹簧,当升降机以加速度a竖直向上加速运动时,两根细线之间的夹角为θ。则弹簧的长度被压缩了()
()指秘书人员所在行业、系统的专业知识。
最新回复
(
0
)