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814.溢流阀故障使系统压力不稳定的原因可能是________。
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815.先导型溢流阀主阀阻尼孔堵塞可能使所控制油路______。
816.先导型溢流阀如果主阀阀盖垫圈漏油将导致系统压力__。
817.先导型溢流阀如外控油口完全泄压则系统油压________。
Part I Listening Comprehension (20minutes)Directions:This part is to test your listening ability. It consists of 4 sections.Section ADirections:This section is to test your ability to understand short dialogues. There are 5 recorded dialogues in it. After each dialogue, there is a recorded question. Both thedialogues and questions will be spoken only once.When you hear a question, youshould decide on the correct answer from the 4 choices marked A), B), C) andD) given in your test paper. Then you should mark the corresponding letter on theAnswer Sheet with a single line through the center.Example:You will hear:You will read:A) New York City.B) An evening party.C) An air trip.D) The man’s job.From the dialogue we learn that the man is to take a flight to New York. Therefore, C) An air tripis the correct answer. You should mark C) on the AnswerSheet with a single line through the center.[A] [B] [C] [D]Now the test will begin.1. A) There is no paper. B) The man can use the printer.C) The printer doesn’t work. D) The man has to pay first.2. A) He has got a new job. B) He has got a pay rise.C) He has been promoted. D) He has bought an apartment.3. A) Sell a car. B) Rent a car.C) Repair a car. D) Buy a used car.4. A) He doesn’t like the color. B) He doesn’t like the style.C) It is too small. D) It is of poor quality.5. A) The chief engineer. B) The receptionist.C) The office secretary. D) The sales manager.Section BDirections:This section is to test your ability to understand short conversations. There are 2 recorded conversations in it. After each conversation, there are some recorded questions. Both the conversations and questions will be spoken two times.When you hear a question, you should decide on the correct answer from the 4 choices marked A), B), C) and D) given in your test paper. Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.Now listen to the conversations.Conversation 16. A) The goods are out of stock. B) She is moving to another city.C) The sales season is coming soon. D) She is afraid the price will go down.7. A) By train. B) By air. C) By ship. D) By truck.8. A) In three weeks. B) In two weeks. C) Next week. D) Next month.Conversation 29. A) HR manager assistant. B) Sales manager.C) Office secretary. D) Software engineer.10. A) 3 weeks. B) 6 weeks. C) 3 months. D) 6 months.Section CDirections:In this section you will hear a recorded short passage. The passage is printed inthe test paper, but with some words or phrases missing. The passage will be readtwo times.You are required to put the missing words or phrases on the AnswerSheet in order of the numbered blanks according to what you hear.Now the passage will begin.I think we’llbegin now. First I’d like to welcome you all and thank you for your coming,especially at such short notice. I know you are all very busy and it’s difficult to take time awayfrom your11.for meetings.As you can see on the agenda, today we will focus on the upcoming12.. First we’ll discuss the groups that will be coming in from Germany. After that, we’lldiscuss the NorthAmerican Tours,13by the Asian tours. If time14, we will also discuss the Australian tours which are booked for early September. Finally, I’m going to request some feedback from all of you-----15.[音频]_____last year’s tours and where you think we can improve.Section DDirections:This section is to test your ability to comprehend short passages. You will hear a recorded passage. After that you will hear five questions. Both the passage and the questions will be read two times.When you hear a question, you should complete the answer to it with a word or a short phrase (in no more than 3 words). The questions and incomplete answers are printed in your test paper. You should write your answers on the Answer Sheet correspondingly.Now listen to the passage.16.What product does the company produce?.17. Whenwas the company set up?ago.18. Whereare their products sold?Both and abroad.19. According to the speaker, why do their products have a good reputation?Because of the high quality and good after-salesservicethey provide.20. What does the speaker promise to give for a large order?Aspecial discount.
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