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中国新民主主义革命理论最基本的内容是()
SECTION B INTERVIEW
Directions: In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. Questions 1 to 5 are based on an interview. At the end of the interview you will be given 10 seconds to answer each of the following five questions.
Now listen to the interview.
听力原文：Mr. Swift: You've done a very good job for a first letter.
Mr. Sun: Thanks. But you' ye marked some lines on the page.
Mr. Swift: They don't mean that something is wrong about your grammar. I mean that, maybe they can be improved in the light of Western writing habits.
Mr. Sun: Can you show me how？
Mr Swift: Of course. For example, some things arch' t clear enough. Now look here. Your sentence about graduate school is confusing.
Mr Sun: Why？ "I left the Northwestern Electronic Technology Institute in the year 1998."
Mr. Swift: Well, it' s not clear whether you dropped out or whether you completed your studies there when you used the word "left".
Mr Sun: Of course I completed my studies.
Mr Swift: Then make it clear. Another point. You referred to this institute here as an "Institute", here as a "college" and still here as a "university", What on earth is it？
Mr Sun: I see your point.
Mr Swift: Now. this one. You said. "May ! take the liberty to introduce myself to you？"
Mr Sun: Isn't it polite to say so？
Mr Swift: Yes, but we probably wouldn' t write like this be cause you have already taken the liberty, so why ask permission now？
Mr Sun: I wrote according to my Chinese standards.
Mr Swift: In our country it' s more polite and appropriate to sweep clean extraneous material ,fancy sentences, and extra adjectives and adverbs.
Mr Sun: I don't quite understand why that's more courteous.
Mr Swift: Well. Suppose that I' m the one you addressed to. I' m sitting behind my desk preparing a lecture for the postgraduates next week. All around my desk are piles of notes and references. Now and then a publisher has called in to know the progress of the book for correction. The executive board has called for my arrangement of next year' s research fund as well as my intention for next year' s postgraduate enrollment. My car is to be taken out of the garage. I have to go to the hospital to receive an annual examination at 2:00 in the afternoon. I shall remember to meet my friends in the airport at 4:00 in the afternoon. There are some students waiting outside of my office...
Mr Sun: OK, OK, I get our point. Then you get my mail among other things of the same quality.
Mr Swift: You see it now.
Mr Sun: Well, maybe I shall forget the whole thing.
Mr Swift: No, no. Not at all. You just want to make things as easy as possible for your addressee. You need tell him immediately the purpose of your letter, that is, that you are applying for a fellowship. Then he has a context in which to judge the rest of the in formation you supply.
Mr Sun: You are quite right.
Mr Swift: Then he wants the rest of the information in a form. that makes it fast and easy for him to digest.
Mr Sun: Are you suggesting that I send a resume with the letter？
Mr Swift: That is most welcome.
Mr Sun: OK. Thanks a lot for your advice.
Mr Swift: You' re welcome. See you tomorrow.
Mr Sun: See you.
Mr. Swift has marked some lines on the page because ______.
The prototype, fifty-passenger single-deck vehicle, is to go in operation in Manchester shortly, and discussions with the Department of the Environment are expected to lead to a further batch of twenty going into regular passenger service in Manchester within two year and possibly in other cities, including London.
Unlike the small government-sponsored battery bus now undergoing trials in provincial cities, whose low speed and range effectively limits it to city-center operation, the new Silent Rider, with a range 40 miles between charges and a speed of 40 m. p. h. , will take its place with diesel buses for normal urban and sub urban services.
Its capital cost is higher (about 20,000 pounds compared with 1500 pounds) but lower maintenance and fuel costs bring it down to fully competitive cost with the diesel bus over thirteen year without taking into account the environmental benefits. The Chloride battery group--which is developing it in partnership with SELN (South-East Lancashire and North-East Cheshire Passenger Transport Authority) is confident of a market potential of 400 vehicles a year by 1980.
The prototype weighs 16 tons, of which the batteries and passengers account for each. It has a single set of batteries, which take three and a half hours to recharge, against the normal eight hours of passenger traffic.
A larger , Mark II version is being designed with two sets of batteries which can be charged in under a minute. That will allow low-cost night charging and greater operational flexibility.
What had been the main factor preventing the development of battery buses？
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