首页
登录
职称英语
The speaker thinks that [br] [originaltext] Ok, good afternoon, ladies and g
The speaker thinks that [br] [originaltext] Ok, good afternoon, ladies and g
游客
2024-12-22
49
管理
问题
The speaker thinks that [br]
Ok, good afternoon, ladies and gentlemen. In previous weeks we talked about different types of pollution and this week I want to focus on air pollution, with air pollution caused by the car. It’s well known that cars are the main cause of air pollution in cities, which comes up to 60% in some cities and in others even as high as 90% of all air pollution caused by the car. Cars contribute a great deal to the air pollution in our cities, and this will get worse as the number of cars increases in the cities.
Firstly, I’d like to talk about how cars cause air pollution. How does a car cause air pollution? Well, you are all familiar with the internal combustion engine. There’s a mixture of petrol which explodes and this explosion helps propel a car forwarD.Unfortunately, in this process there are some poisonous chemicals which remain, and these poisonous chemicals mainly come out of the back of the car through the exhaust.
Now, it’s not just what comes out of the car exhaust that is dangerous, the brakes also cause pollution. The brakes on cars give off asbestos, and as you know asbestos is... is a highly dangerous substance and can kill us.
And thirdly, the tires themselves give off small rubber particles which are not very good for health. We need to find solutions to this problem. I’m going to talk about 4 possible solutions.
Firstly, we should try and discourage the use of cars. We could do this by putting higher taxes on petrol or we could make cars more expensive. We could put the price of cars up.
Secondly, we might encourage alternative methods of transport. For example, recently in Shanghai, you’ve built a subway, which takes some of the pressure off the roads. Some people would use the subway rather than using cars. In addition, we could improve public transport, make it more comfortable, safer, and more regular so that the people will use public transport rather than cars. Next, we could also use cleaner fuels rather than petrol. For example, we might use natural gas in the future or we might experiment with battery group in cars.
And lastly, we could try mechanical means for reducing the amount of chemicals that are
emitted, which come out of cars, which come out of the exhaust pipe. We could fix things called catalytic converters to exhaust pipes. These are something... these are a device which are fixed over to the exhaust, which controls the carbon monoxide, which reduces the amount of dangerous chemicals that cars give off.
Now it’s unlikely that any one of these solutions will work on its own. I’m pretty sure that it would take a combination of all four of these solutions to solve the problem.
选项
A、to change the chemical structure of fuel.
B、to improve on the exhaust pipe.
C、to experiment with new engines.
D、to monitor the amount of chemicals.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3879748.html
相关试题推荐
Whydidtheprotestersmakesuchaprotest?[br][originaltext]Oppositionp
ForMrs.Saxby,theresumeisall-important,becauseit[br][originaltext]M:A
ForMrs.Saxby,theresumeisall-important,becauseit[originaltext]M:Asyou
TheUnitedNationsGeneralAssemblywillsetupanewagencyto[originaltext]
What’sthepurposeofthecarbombing?[originaltext]ATalibansuicidecarb
Whatisthenewsmainlyabout?[br][originaltext][7]Votingistakingplac
Theman’sfirstjobwasin[br][originaltext]W:Goodevening.Herewithusis
Theman’sfirstjobwasin[br][originaltext]W:Goodevening.Herewithusis
Theman’sfirstjobwasin[originaltext]W:Goodevening.HerewithusisHerny
Accordingtothenews,AmericantroopsinPanama______.[originaltext]TheUn
随机试题
Belowisasummaryofsomeofthemainpointsofthepassage.Readthesumma
根据合同法律制度的规定,下列赠与合同中,不得主张任意撤销的有()。A.赠与财产
发明专利权的期限为()年,实用新型专利权和外观设计专利权的期限为10年,均自申
外耳道红肿局部治疗可选用()A:3%硼酸乙醇 B:赛洛唑啉 C:2%酚甘油
患者女,64岁。突然出现心慌,伴短暂晕厥。心电图如图25-9所示,图25-9A为
葡萄球菌能引起发热主要由于:A.外毒素 B内毒素 C.淋巴因子 D.抗原抗
在小学教育中,往往把学生分为高、中、低三个年级段,这遵循的儿童心理发展规律是(
共用题干 FamilyHistoryInanagewhenthet
关于金融监管的说法,不正确的是()。A.从银行监管开始的 B.对金融
28岁初次妊娠妇女。既往无糖尿病病史,现妊娠26周,行2小时糖耐量试验。血糖水平
最新回复
(
0
)