【多选题】
关于急冷油油运的目的，下列叙述正确的有___。
A. 确认系统流程畅通
B. 检查系统有无“跑、冒、滴、漏”
C. 便于加热急冷油
D. 检验机泵运行情况
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答案
ABCD
解析
暂无解析
相关试题
【多选题】
对于设有中段回流的汽油分馏塔来说，当塔釜温度过高时，可以采取的调节措施有___。
A. 适当提高塔顶汽油回流
B. 提高中段热油回流撤热
C. 提高管道急冷器急冷油喷淋量
D. 适当降低裂解燃料油采出量
【多选题】
关于裂解炉的维护内容，下列说法正确的是___。
A. 烟气横跨温度不得超过设计指标的50℃以上
B. 炉出口压力不得超过设计值
C. 裂解炉炉膛应保持在一定的负压下运行，不允许正压操作
D. 烟气含氧量应维持在2~3%之间，并保证烟囱不冒黑烟
【多选题】
蒸汽透平润滑油系统在启动透平前，正确的状态有___。
A. 润滑油辅助油泵已经启动，润滑油压力正常
B. 润滑油冷却器已经正常投用
C. 两台润滑油过滤器一台已经正常投用，另一台已经充液备用
D. 润滑油油箱满液位
【多选题】
下列措施有利于降低急冷油粘度的是___。
A. 适当提高减粘塔塔顶温度
B. 适当加大汽油分馏塔塔顶汽油回流量
C. 提高管道急冷器急冷油循环量
D. 适当减少侧线裂解柴油采出量
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【单选题】
4. If you read a lot, your life ______ full of pleasure.
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【单选题】
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【单选题】
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— Sorry．I don’t know．But he was here just now．
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【单选题】
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【单选题】
10. I often see Tom on the playground．When I passed the playground yesterday, I saw him ．
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【单选题】
11. — Mum, could I have ____________ to drink?
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【单选题】
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【单选题】
14. I don’t know the teacher is talking with Miss Wang．
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【单选题】
15.Millie does __________ that many people are thankful to her．
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【单选题】
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【单选题】
17. I often go on holiday with my parents _____ summer.
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A. A
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C. C
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【单选题】
18. I called you at 4:00 yesterday afternoon, but nobody answered.
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【单选题】
19.––Who is on the playground? ---__________．
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20. The schoolboy ______ a blind man cross the street yesterday.
A. helps B. helped C. will help D. has helped
A. A
B. B
C. C
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【单选题】
21. —The 2010 World Expo which will last 184 days will be held in Shanghai on May 1st.
—________exciting news! We shall try our best to support it.
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A. A
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C. C
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【单选题】
22. They preferred ______ in bed rather than _____ horses．
A. to lie; to ride B. lying; riding C. lying; ride D. to lie; ride
A. A
B. B
C. C
D. D
【单选题】
23. —What was Jim wearing at the party?
— Nothing _______. He was in his usual shirt and jeans.
A. special B. simple C. important D. interesting
A. A
B. B
C. C
D. D
【单选题】
24. The 2016 Olympic Games ________ in Brazil. Would you like to go there?
Maybe, if possible.
A. are held B. will be held C. were held D. have been held
A. A
B. B
C. C
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【单选题】
25. — David, look at the man in white over there．Can you tell me _______ ?
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A. A
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【单选题】
( ) 26.With help from a Mr. H, you can__________.
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【单选题】
( ) 27. A PENGO WATCH CONTROL can help you to ______________.
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【单选题】
( ) 28. You can get your Mr. H for___________.
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A. A
B. B
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【单选题】
( ) 29. When was canned food invented?
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A. A
B. B
C. C
D. D
【单选题】
( ) 30. After the trip to the Arctic, Clarence Birdseye invented ____________.
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A. A
B. B
C. C
D. D
【单选题】
( ) 31. Changes in weather _____________ in Willis Carrier's company.
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C. caused health problems D. hurt printing paper
A. A
B. B
C. C
D. D
【单选题】
( ) 32. According to the passage, which of the following may lead to inventions?
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A. A
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C. C
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【单选题】
( ) 33. What is the writer's main purpose（目的）in writing this passage？
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B．To tell people what kind of person his father was．
C．To tell the readers what present he got from his father．
D． To let people know how poor he was．
A. A
B. B
C. C
D. D
【单选题】
( ) 34. Why did the father not ask his son not to do this and do that？
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B．Because he was born from a poor family．
C．Because he was a man of few words．
D．Because he didn't want to be much too strict with his son．
A. A
B. B
C. C
D. D
【单选题】
( ) 35. What would someone learn from this passage？
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C．What a good father should do． D．What the self-important is like．
A. A
B. B
C. C
D. D
【单选题】
( ) 36. What may be the proper Chinese for the underlined part in the passage？
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A. A
B. B
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【单选题】
( ) 37. The Chinese Yellow Sea Wetlands are in the _______ of China．
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A. A
B. B
C. C
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【单选题】
( ) 38. Usually the weather in the wetlands is _______．
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A. A
B. B
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【单选题】
( ) 39. The World Wetlands Day is on _______．
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B. B
C. C
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【单选题】
( ) 40. We must protect wetlands because _______．
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A. A
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【单选题】
) 1. —Is it far from here to the bank?
—Not very, only________．
A. 20 minute’s walk B. 20 minutes walk
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A. A
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【单选题】
2. — After discussing, the students ________ some good ideas to work on the project.
— Thats great!
A. put up B. set up C. caught up with D. came up with
A. A
B. B
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【单选题】
3. Yesterday Tommy walked past my table and ______ my bowls and dishes.
He should be careful next time.
A. knocked off B. took off C. showed off D. turned off
A. A
B. B
C. C
D. D
