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
2023-08-23
76
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.[21]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.
20. According to the speaker, what problem may indoor air pollution bring to people?
21. What causes the indoor air pollution according to the speaker?
22. What is the most effective way to clean the air?
选项
A、The building method the builders use to save energy.
B、The limit of the flow of air between inside and outside.
C、The use of man-made building materials.
D、The limit of air-flow and the man-made materials.
答案
D
解析
短文提到,建筑者们为了不浪费能源,他们建造能限制室内与室外之间的空气流动的建筑物,他们还开始使用人造建筑材料。据目前所知,这些材料会释放出有害气体。正是这两个方面导致了室内空气污染,因此本题选D。
转载请注明原文地址:https://tihaiku.com/zcyy/2951493.html
相关试题推荐
[originaltext]TUVALU,atinycountryinthePacificOcean,hasaskedforhe
[originaltext]E-booksarebringingaboutaprofoundrevolutioninthewayb
[originaltext]AmericanmagicianDavidBlaineistobesuspendedinaglass
[originaltext]AmericanmagicianDavidBlaineistobesuspendedinaglass
[originaltext]AmericanmagicianDavidBlaineistobesuspendedinaglass
[originaltext]W:Honey,couldyoucomehereforasecond.Weneedtotalk.Myp
[originaltext]W:Honey,couldyoucomehereforasecond.Weneedtotalk.Myp
[originaltext]W:Iwasworkingonapaperaboutthedifferencesbetweenwomena
[originaltext]W:Iwasworkingonapaperaboutthedifferencesbetweenwomena
[originaltext]W:Wow,youmusthavehad5hamburgersalready.Andthefootball
随机试题
Tenyearsago,JoeAllenbeganstudyingadiversegroupofseventhgradersn
[originaltext]W:Hi,Jerry,Ifinditdifficulttosolvedisputesbetweenlover
Whyyoushouldn’
影响影像锐利度的因素中,最大的不锐利是A.几何模糊 B.移动模糊 C.物体吸
轴心竖向力作用下,单桩竖向承载力应满足的条件是: A.Qk≤RaB.Qi
瑞翔网络(集团)发展有限公司是国内知名的互动娱乐传媒公司。该集团公司成立于19
(2017年真题)苦杏仁中毒,严重者主要表现为( )A.出现各种出血症状,严重
(2021年真题)建设工程保修期内出现的质量问题,不属于施工单位保修责任的有(
健康促进的核心策略包括( )。A.保护环境 B.职业卫生 C.社会动员
施工成本控制的主要依据包括()。A.工程承包合同 B.施工成本计划 C
最新回复
(
0
)