首页
登录
职称英语
[originaltext] For years scientists have been worried about the effects of a
[originaltext] For years scientists have been worried about the effects of a
游客
2024-03-13
6
管理
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://tihaiku.com/zcyy/3530510.html
相关试题推荐
[originaltext]MyfellowSingaporeans:Whatwereyourmostmemorablemoments
[originaltext]MyfellowSingaporeans:Whatwereyourmostmemorablemoments
[originaltext]AbeetleinvasionintheUnitedStateshaskilledatleasttwenty
[originaltext]AbeetleinvasionintheUnitedStateshaskilledatleasttwenty
[originaltext]AbeetleinvasionintheUnitedStateshaskilledatleasttwenty
[originaltext][12]Intoday’spersonalitystakes,nothingismorehighlyvalued
[originaltext][12]Intoday’spersonalitystakes,nothingismorehighlyvalued
[originaltext]Pianosarenormallyfoundinbuildingforobviousreasons.Howeve
[originaltext]Pianosarenormallyfoundinbuildingforobviousreasons.Howeve
[originaltext]W:Hello.M:Hello,isthatthereferencelibrary?W:Yes.CanI
随机试题
Haveyoueverhadthe【S1】______towandertheworldandseewhatwasoutther
Whydoesthespeakerthinksomestudentsdon’tlikehistory?[br][originaltex
液态液化石油气在管道内的平均流速比较经济、合理的为()m/s。A.1.8
依据《水运工程混凝土结构实体检测技术规程》(JTS239-2015)进行硅烷浸渍
北京四合院的布局体现了我国( )的传统思想。A.敬天祀祖 B.皇权至上 C.
高校组织的结构特征是()。A.学术性 B.分散性 C.二元性 D.
患者,女性,57岁。2型糖尿病。身高158cm,体重75kg,无明显“三多一少”
经营者违反明码标价的行为包括()。A、不标明价格B、在标价之外加价出售商品C
对于出血证,无论属寒属热,有无瘀血,皆可随证配伍使用的药物是( )。A.茜草
()是指某一国家经济、政治或社会状况恶化,威胁到在该国有重大商业关系或利益的本
最新回复
(
0
)