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、A new fuel for buses. B、The causes of air pollution. C、Careers in environmental engineering. D、A way to improve fuel efficienc
A、A new fuel for buses. B、The causes of air pollution. C、Careers in environmental engineering. D、A way to improve fuel efficienc
admin
2010-08-21
32
问题
M: Hi, Diana. Mind if I sit down?
W: Not at all, Jack. How have you been?
M: Good. But I’m surprised to see you on the city bus. Your car in the shop?
W: No. I’ve just been thinking a lot about the environment lately. So I decided the air will be a lot cleaner if we all use public transportation when we could.
M: I’m sure you are right. The diesel bus isn’t exactly pollution free.
W: True. But they’ll be running a lot cleaner soon. We were just talking about that in my environmental engineering class.
M: What’s the city gonna do? Install pollution filters of some sort on their buses?
W: They could, but those filters make the engines work harder and really cut down on fuel efficiency. Instead they found a way to make their engines more efficient.
M: How?
W: Well, there is a material called coniine oxide. It’s a really good insulator. And a thick coat of it get sprayed on certain part of the engine.
M: An insulator?
W: Well, yeah. Actually, what it does is reflect back the heat of burning fuel. So the fuel will burn much hotter and burn up more completely.
M: So a lot less unburned fuel comes out to pollute the air, right?
W: Yeah, and the bus will need less fuel. So with the savings on fuel oil costs, they say this will all pay for itself in just six months.
M: Sounds like people should all go out and get some of this stuff to spray on their car engines.
W: Well, it’s not really that easy. You see, normally, the materials are fine powder. To melt it so you can spray a coat of it on the engine parts, you first have to heat it over 10,000 degrees and then, well, you get the idea. It’s not something you or I would be able to do ourselves.
选项
A、A new fuel for buses.
B、The causes of air pollution.
C、Careers in environmental engineering.
D、A way to improve fuel efficiency in buses.
答案
D
解析
从听力对话中我们可知女士向男士介绍一种能使发动机运转更有效率的方法(a way to make their engines more efficient)。听力材料中前半部分提到的女士选择坐公共汽车以及环境污染问题实际都是在为下文介绍coniine oxide这种提高发动机效率的方法作铺垫。
转载请注明原文地址:https://kaotiyun.com/show/iq7K777K
0
大学英语六级
相关试题推荐
Itis___________________________(在空闲的时间里他一直在学习)acourseinFrenchfor3months.
ExteriorPaintingGettingStartedPaintingtheexteriorofyourhouseisahugejob.Buttherewardsaregreattoo.Witham
Theplaceofthechildinsocietyhasvariedforthousandsofyearsandhasbeeneffectedbydifferent【S
Urbanlifehasalwaysinvolvedabalancingofopportunitiesand【B1】______againstdangersandstress;its【B2】______forceis,in
GrowingnumbersofGermansarebecomingaddictedtotext-messaging,aGermandoctorhaswarned,【B1】______therearesome380,00
Althoughtheclimbupthecorporateladderseemstobegoingslowlyforwoman,corporateAmericawouldbenefitfromhavingmore
Jerrywasthekindofguywhowasalwaysinagoodmoodandalwayshadsomethingpositivetosay.Whensomeonewouldaskhimhow
A、Heistoosloppy.B、HeborrowsColin’sthings.C、Hebringsguestsovertotheapartment.D、Hedoesn’tusethekitchenenoughC
A、Thekidsarealwayseating.B、Thekidscouldfinishthefoodwithin15seconds.C、Thekidseattooloudly,lickingtheirlips.
A、TothelibraryB、TothetheatreC、TotheresearchinstituteD、TothelaboratoryA
随机试题
心理学研究表明,人每天晚上都会做梦,梦是()。
设总体X~N(μ,σ2),其中σ2已知,x1,x2,…,xn为样本,,作为μ的置信区间,其置信水平为【】
A.尿道吻合术B.留置尿管C.绝对卧床,密切观察D.膀胱造瘘术尿道挫伤时行
肌肉可收缩,但不能产生动作为几级肌力
三羧酸循环的反应中,下列哪一步不为呼吸链提供氢原子
症见肠鸣漉漉有声,其病机为
临床常用的复合麻醉技术有________、________。
工程项目周期中工作量最大、花费时间最长、涉及面最复杂的是()阶段。
公安刑事执法的基本原则有()。
I’musuallyfairlyskepticalaboutanyresearchthatconcludesthatpeopleareeitherhappierorunhappierormoreorlesscerta
最新回复
(
0
)