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[originaltext]W: Hello?M: Hi, Amy. This is Bill Johns.W: Oh hi, Bill. You wer
[originaltext]W: Hello?M: Hi, Amy. This is Bill Johns.W: Oh hi, Bill. You wer
游客
2023-07-30
33
管理
问题
W: Hello?
M: Hi, Amy. This is Bill Johns.
W: Oh hi, Bill. You weren’t in engineering class today, weren’t you?
M: I have the flu. I was wondering if you could tell me what went on.
W: Actually we had an interesting class. Dr. Collin talked about a new type of fuel.
M: Oh, yeah?
W: Uhhum, It’s called Dimethyl ether or DME.
M: Oh, I remember reading something about DME. It’s mostly used in spray cans,, right?
W: Right, DME doesn’t destroy the ozone, so it is environmental friendly.
M: But doesn’t DME pollute the air if it’s burned in an engine?
W: Dr. Collin said something about its exhaust being dean, that it doesn’t re lease as much pollutant as diesel fuel. And he mentioned something about DME being more efficient than other alternative fuels.
M: When will it replace diesel fuel?
W: Not for a while. It’s not economical to massproduce.
M: Well, thanks for the information. I guess I won’t need to borrow your notes.
W: Well, maybe you should look at them. We are having a test next week.
M: Okay, could you give them to Mike Andrews? I think he is in your psychology class. He is my roommate.
W: Sure. I hope you’re feeling better soon.
M: Thanks. Me too. Bye!
W: Bye!
选项
A、It will increase the amount of unpleasant odors from vehicles.
B、It will eventually destroy the ozone layer.
C、It will reduce the amount of pollutants in the air.
D、It will reduce the cost of running large vehicles.
答案
C
解析
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