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
2016-12-18
32
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://jikaoti.com/ti/unmFFFFM
0
大学英语六级
相关试题推荐
Overacenturyago,AlfredRussellWallacewrotethat"weliveinazoologicallyimpoverishedworld,fromwhichallthehugest,
Phew,whatarelief.ItseemsthattheRoyalShakespeareCompanyandShakespeare’sGlobewon’thavetochangetheirnamesanyti
微博(microblog)是近几年开始兴起的一种社交网络服务。简单地说,就是将不超过140个字的几句话或者图片,通过电脑或手机发到微博上,随时随地和朋友分享你生活中的所见、所闻和所想。作为一种交际工具和获取信息的平台,这种新型的交流方式在不同年龄段的人群中
A、Toattendtheorientation.B、Tomeethisprofessor.C、Tofindsomebooks.D、Tousethecomputer.C
A、Sellingdirecttothepublic.B、Sellingthroughtheirownchain.C、Sellingbyonlinestores.D、Sellingthroughsmallshops.C事
A、Universitiesdon’tpaymuchattentiontoacademicachievement.B、Professorsassigntoomuchworktostudentsinashorttime.
GrammyawardwinningproducerandfilmdirectorMarkJohnsonhas【B1】_____hislifetoconnectingpeoplethroughmusic.Heandhis
A、Studyinghistory.B、Buyinglotterytickets.C、Registeringforcourses.D、Goingtoanartgallery.C女士说电子工程学和艺术史报选的最后限期快到了,而男士正
A、Achemistryassignment.B、Astudytheirchemistryprofessordid.C、Acoursethewomanistaking.D、Ajobpossibility.D主旨大意题。女
WilmaSubrahadnointentionofbecomingapublicspeaker.After【B1】______fromcollegewithdegreesinchemistryandmicrobiolog
随机试题
引起劳动法律关系产生的法律事实是()
蛋白质的等电点是
按照规定,发包人接到承包人已完工程量报告后7天内未进行计量核对的,下列中说法正确的是()。
“进口口岸”栏应填:“收货单位”栏应填:
银行业从业人员在办理业务时须遵循的规则有()。
甲企业2009年3月15日,与乙公司签订协议销售商品一批,增值税专用发票上注明价格为500万元,增值税额为98万元。由于是成批销售,甲企业给予乙公司20%的商业折扣。商品已发出,款项已收到。则该企业2009年3月应确认的收入为()万元。
自恋型人格是指过于重视自我价值而缺乏对自身和他人进行理性和客观认识的一种人格。回避型人格是指行为退缩、心理自卑,面对挑战多采取回避态度或无能应付的一种人格。下列属于自恋型人格的是()。
()认为社会工作者只有从受助家庭所处的特殊处境和方式着手,才有可能把握受助家庭成员的真实需求,提供符合受助家庭成员要求的服务。
案例:王老师在进行“排球正面双手垫球”的课堂教学中,首先讲解了这项技术动作,然后简单介绍了技术动作的关键字“插”“夹”“提”“蹬”“伸”。学生向王老师询问这五个关键字的具体含义,他只是说你们自己体会,随后让学生进行练习。在练习过程中,王老师设计
局域网指较小地域范围内的计算机网络,一般是一幢或几幢建筑物内的计算机互连成网。下面关于以太局域网的叙述中,错误的是()。
最新回复
(
0
)