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已知接成Y形的三个电阻都是20Ω,则等效△形的三个电阻阻值为( )。
2018年6月A级考试真题[音频]Part Ⅰ Listening Comprehension (20 minutes)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 the dialogues and questions will be spoken only once. 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.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 trip is the correct answer. You should mark C) on the Answer Sheet with a single line through the center.［A］［B］［C］［D］Now the test will begin.1. A) A training course. B) A work plan.C) Computer skills. D) Business management.2. A) He attended a summer school.B) He worked as a volunteer.C) He travelled around the country.D) He made a survey in a local hospital.3. A) He has been writing a paper.B) He has been studying all night.C) He has been playing games all night.D) He has been working on the night shift.4. A) Very clear.B) Too simple.C) Too long.D) Very good.5. A) He is having a meeting. B) He is in his office now.C) He is available next week. D) He is on sick leave.
[音频]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) He broke his leg. B) He has caught a cold.C) He has a stomach ache. D) He has a toothache.7. A) At 2 o’clock this afternoon. B) At 3 o’clock this afternoon.C) At 10 o’clock this morning. D) At 10 o’clock tomorrow morning.Conversation 28. A) A construction company.B) An engineering company.C) A clothing making company.D) A website design company.9. A) In the suburbs. B) Near the airport.C) In the downtown area. D) In a small town.10. A) On foot. B) By bus.C) By car. D) By subway.
[音频]Section CDirections: In this section you will hear a recorded short passage. The passage is printed in the test paper, but with some words or phrases missing. The passage will be read two times. You are required to put the missing words or phrases on the Answer Sheet in order of the numbered blanks according to what you hear.Now the passage will begin.Good Evening Everyone!Thank you for this wonderful farewell party for me. When I’m leaving, nothing is 11 than to learn that I am so special. I want everyone here to know that this is the place where I have become the person I am today. I have learned everything that I needed to learn, and more, from this 12 job. I want to thank this organization, particularly my director, Mr. Anderson, for giving me the space 13 , for allowing me to make my own decisions, and then learning from my own 14 .As I move on to a world with 15 , I can only say “Thank you, my dear friends”, and I will always cherish everything this company has given to me.
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