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细节题。短文末句明确提到,使空气清新的最有效
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细节题。短文末句明确提到,使空气清新的最有效
admin
2013-08-12
57
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 land 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.
30. According to the speaker, what problem may indoor air pollution bring to people?
31. What causes the indoor air pollution according to the speaker?
32. 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
细节题。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/zj97777K
0
大学英语六级
相关试题推荐
Ithasbeennecessarytoreferrepeatedlytotheeffectsofthetwoworldwarsinpromotingallkindsofinnovation.Itshouldb
A、It’soverpriced.B、Itmakespeoplecrazy.C、It’sdifferentfromothercoffeehouses’coffee.D、AllthecoffeeisfromBrazil.
Everyonehasamomentinhistory,whichbelongsparticularlytohim.Itisthemomentwhenhisemotionsachievetheirmostpower
A、Ataconcert.B、Atthecampuscanteen.C、Inasupermarket.D、Atamuseumentrance.D男士认为艺术展览的门票太贵,自己负担不起,女士建议他使用学生证,就可以享受门票折扣,
Whatdoyouthinkofwhenyouthinkaboutdrugs?Heroin?Cocaine?Usuallywethinkabouttheseillegal,harddrugs,butwhatabo
A、Shelovedit.B、Shedisagreedwithtoomuchofittoenjoy.C、Shethoughtitwasjustsoso.D、Shelikedtheclassbutdisagre
Marriedparentstendtobeof【C1】______thesameage.Husbandsareusuallyolderthantheirwives,butthisdifferenceinageha
TodayIwanttohelpyouwithastudyreadingmethodknownasSQ3R.Thelettersstandforfivestepsinthereading【B1】______S
A、Studentsmightnotconsiderthemtobeanimportantpartofculture.B、Theysymbolizetherebellionofyouthinthe1950’s.C、
Everyonewouldhaveheardthefamousphrase"Angerisonesortofdanger".Itisanage-oldsaying,butitistestedandstillh
随机试题
下列为窗口事件的是()。
BrightonisapopularseasidetownonthesouthcoastofEngland.Notlongago,somepolicemenwerevery【21】.There【22】severals
男,40岁。诊断左肾结核,膀胱容量20ml,右肾严重积水伴尿毒症,宜首先行
某县工商局认为该辖区的某饭店没有申请营业执照,于是将该店查封。该饭店老板不服,决定向上级工商机关提起行政复议,要求撤销该查封决定,但没有申请赔偿。上级工商机关经审查认为该查封行为违法,决定予以撤销。对于查封造成的经济损失,复议机关应当如何处理?
非铠装电缆用于()时,应采用具有机械强度的管或罩加以保护。
()是指银行产品通过试销打开销路,转入成批生产和扩大销售的阶段。
()是指客户把持有的外币储蓄存款、外币现钞按银行对外公布的现汇、现钞买人价卖给银行,由银行兑付相应的人民币。
某云计算服务商向电信运营商提供计算能力、存储空间及相应的运营管理服务,按照云计算服务提供的资源层次,该服务类型属于()。
Thepeoplewhoobjectedtothenewapproachweretoldthatsinceworkhadalreadystaredtherewasnopointin______.
Throughaseriesofexperiments,anAmericanscientisthasobtainedanunderstandingofthesocialstructureofthemostcomplex
最新回复
(
0
)