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
2024-04-11
2
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://www.tihaiku.com/zcyy/3550087.html
相关试题推荐
Scientistshavebegunusingsatellite-basedsystemstopredictvolcanicerup
Scientistshavebegunusingsatellite-basedsystemstopredictvolcanicerup
[originaltext]Everyyear,peopleinAmericauseenergyequaltoover30mil
[originaltext]Everyyear,peopleinAmericauseenergyequaltoover30mil
[originaltext]Ifsheernumbersprovideanyproof,America’suniversitiesar
[originaltext]Ifsheernumbersprovideanyproof,America’suniversitiesar
[originaltext]Ifsheernumbersprovideanyproof,America’suniversitiesar
[originaltext]W:Iwonderifyoucouldtellmealittlebitaboutyourjobasa
[originaltext]W:Iwonderifyoucouldtellmealittlebitaboutyourjobasa
[originaltext]W:Charles,asasinger,doyouevermakeyourselfcrywhenyous
随机试题
关于先天性甲状腺功能减低的新生儿筛查,哪项是错误的A.经皮采新生儿足后跟血,滴于
股票的价值不包括()。A.票面价值 B.折旧价值 C.清算价值 D
A.远曲小管排H↓B.近曲小管重吸收HCO↓C.远曲小管排H↓和近曲小管重吸收H
皮质激素禁用于溃疡病是因为A.抑制成纤维细胞增生 B.促进胃酸分泌 C.兴奋
如右图所示,甲和乙在面积为54π平方米的半圆形游泳池内游泳,他们分别从位置A和B
浙江Z公司新品线组长老梁,利用3个月的工余时间,经过100多次反复的试验,攻破了
微观经济学研究的是资源利用,宏观经济学研究的是资源配置。( )[中国人民银行真
A.包粉衣层 B.包隔离层 C.打光 D.包糖衣层 E.有色糖浆关于明胶
A.平等-互补型 B.指导-合作型 C.主动-被动型 D.共同协商型 E
具有抗心律失常、抗高血压及抗心绞痛作用的药物是( )。A.可乐定 B.普萘洛
最新回复
(
0
)