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
2023-08-28
39
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 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://tihaiku.com/zcyy/2964130.html
相关试题推荐
[originaltext]Theworld’ssmartestadolescentsinmathematicsandsciencea
[originaltext]Theworld’ssmartestadolescentsinmathematicsandsciencea
[originaltext]TeadrinkingwascommoninChinafornearlyonethousandyear
[originaltext]TeadrinkingwascommoninChinafornearlyonethousandyear
[originaltext]W:ProfessorWilson,canyousparemeafewminutes?M:That’sOK
[originaltext]W:ProfessorWilson,canyousparemeafewminutes?M:That’sOK
[originaltext]W:Doyouthinkyoucangiveanexactdefinitionof"management",
Ithasbeennecessarytoreferrepeatedlytotheeffectsofthetwoworldw
Ithasbeennecessarytoreferrepeatedlytotheeffectsofthetwoworldw
Ithasbeennecessarytoreferrepeatedlytotheeffectsofthetwoworldw
随机试题
WhyGirlsNeedtoSwitchontoComputingThegardeniscomi
[img]2022m3x/ct_ve01202001m_eillist_1057_220329[/img][br]BrownHall[originalt
通过抑制磷酸二酯酶而加强心肌收缩力的药物是A:地高辛 B:米力农 C:醛固酮
某类风湿关节炎病人近几天来手、足及膝关节肿胀,疼痛加重,活动后疼痛减轻,伴有食欲
左边给定的是纸盒的外表面,下面哪一项能由它折叠而成?
(2017年5月)工资指导价位在不同职业由()等因素决定。A.经济发展水
人每天为某项具体目的从事某项具体活动,而在这些具体活动中又贯穿着一个根本目的.这
表外流动性是商业银行通过()等金融工具获得资金的能力。A.存款 B.股票
(2017年真题)为治疗儿童多动症开具哌醋甲酯片,每张处方的限量是( )A.3
库存现金盘亏的账务处理中,批准前可能涉及的会计科目有()。A、待处理财产损溢
最新回复
(
0
)