首页
登录
职称英语
[originaltext]M: Hi, Diana. Mind if I sit down?W: Not at all, Jack. How have y
[originaltext]M: Hi, Diana. Mind if I sit down?W: Not at all, Jack. How have y
游客
2023-09-15
36
管理
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
What is the conversation mainly about?
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本文介绍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://tihaiku.com/zcyy/3017135.html
相关试题推荐
[originaltext]M:Don’tyourecognizeme,Jean?I’mTom,TomGreen.W:T
[originaltext]M:Don’tyourecognizeme,Jean?I’mTom,TomGreen.W:T
[originaltext]W:Nicetoseeyouagain,John.Ihopeyou’refeelingbetter.
[originaltext]W:Morning,sir.MayIaskwhetherMr.Smithhasfreetimeno
[originaltext]W:Hello,mayIhelpyou?M:Yes,I’dliketobookaroom
[originaltext]W:Hello,ABCCompany.MayIhelpyou?M:Hello.Thisis
[originaltext]W:WhydoyouplantofireJohn?Heissmart.M:Iknow.
[originaltext]W:Morning,sir.MayIaskwhetherMr.Smithhasfreetimeno
[originaltext]W:HowaboutgoingshoppingonSaturday?M:I’dliketo.
[originaltext]M:IneedaticketforRight220onDecember22.W:OK,
随机试题
凝胶过滤法主要用于蛋白和核酸分离,又称为分子筛层析法,其常用介质是A.聚丙烯酰胺
凯旋门是欧洲人纪念战争胜利的建筑形式。巴黎凯旋门上的《马赛曲》浮雕所反映的历史事
具有消食和胃、发散风寒功效的药物是()A.紫苏 B.藿香 C.山楂
治疗瘰疬,瘿瘤,应首选的药物是A.夏枯草 B.淡竹叶 C.马齿苋 D
最适于治疗阵发性室上性心动过速的药物是A.丁卡因 B.普萘洛尔 C.维拉帕米
黄酮类化合物的颜色主要取决于分子结构中的A:烷氧基 B:羧基 C:交叉共轭体
共用题干 男性,67岁,有长期吸烟史,脊柱手术后卧床2周,出现右腿小腿疼痛、紧
某公司普通股股票的风险系数为1:1,市场平均报酬率为10%,无风险报酬率为6%,
《出境危险货物运输包装使用鉴定结果单》超过有效期的,报检人应及时向检验检疫机构申
关于钢筋接头位置的说法,正确的有()。A.钢筋接头位置宜设置在受力较大处
最新回复
(
0
)