相关试题
【判断题】
正常停车前，各干燥器至少有一台再生完毕，反应器应有备用台
【判断题】
干燥器切换时，确认备用台进出口阀已完全打开，才能切出在用台
【判断题】
塔釜再沸器切换时，首先必须对备用台进行预热，预热合格后才能通入液相物料.
【判断题】
塔釜再沸器切换时，首先必须对备用台进行预热，预热合格后才能通入液相物料
【判断题】
碳二加氢反应器出口分析氢气，可分析判断催化剂活性，选择性
【判断题】
碳二加氢反应器出口控制乙炔<5ppm，目的是防止乙烷中乙炔超标，影响裂解炉的运行周期
【判断题】
正常操作时，碳三加氢反应器出口MAPD偶尔少量超标也没关系，因为MAPD可通过精馏法除去
【判断题】
对碳三加氢反应器出口物料进行分析，可以判断催化剂活性，选择性，并可控制丙烯产品中的炔含量
【判断题】
脱甲烷塔顶压力设计指标为3.082MPa
【判断题】
丙烯精馏塔T-530塔压力指标为2.0MPa
【判断题】
低压脱丙塔（T-360）塔釜加热为低压蒸汽
【判断题】
正常操作时，负荷波动会造成反应器出口分析不合格
【判断题】
生产稳定时，乙烷裂解炉的负荷相对稳定，其负荷的提降依据是根据乙烯精馏塔的塔釜液位，液位高则提乙烷，反之则降乙烷
【判断题】
前脱丙烷工艺分离过程中，乙烯装置的乙烯损失主要是碳二加氢反应器的副反应所造成的
【判断题】
碳二加氢反应器进料浓度对反应器的运行周期没有影响
【判断题】
碳二加氢反应器进料中如含有二氧化碳,不但会使反应器中的催化剂活性下降,甚至失活,而且会使
【判断题】
乙炔分压与绿油生成量有关，对催化剂再生周期有影响，而且直接影响催化剂活性
【判断题】
冷区正常停车时，火炬长明线改由高压甲烷提供
【判断题】
热区正常停车前，要将不凝气停止放火炬，改返裂解气压缩系统
【判断题】
正常停车前，各干燥器至少有一台再生完毕，反应器应有备用台
【判断题】
冷区正常停车前，乙烯精馏塔不凝气停返裂解气压缩系统
【判断题】
热区系统导液之前必须先将水排尽后才能导液
【判断题】
进入设备内部检修作业前，应打开设备人孔或通风孔，保持设备内部空气流通
【判断题】
动火人在接到动火许可证后，应逐项检查防火措施，如不符合防火措施要求，动火人也必须按要求动火
【判断题】
氢气在空气中的爆炸极限（V％）是4.0-74.2%
【判断题】
甲烷在空气中的爆炸极限（V％）是2.5～80%
【判断题】
在膨胀机停车时，立即将备用泵由自动打为手动，然后停润滑油泵
【判断题】
冷区正常停车时，燃料气系统改由高压甲烷提供
【判断题】
正常停车前要确认碳三加氢反应器已完全再生
【判断题】
脱丁烷塔正常停车时尽量避免大量轻组分带入粗汽油罐
【判断题】
乙烯装置不含水的物料均可直接排放至火炬
【判断题】
火炬最大排放量的确定原则是按事故状态时各系统排出的全部气体总量来考虑
推荐试题
【单选题】
( ) 30. Why did the father not ask his son not to do this and do that？
A．Because he felt quite confident of his son．
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．
【单选题】
( ) 31. What would someone learn from this passage？
A．How to live by oneself． B．How to stand on one's own feet．
C．What a good father should do． D．What the self-important is like．
【单选题】
( ) 32. What may be the proper Chinese for the underlined part in the passage？
A．闲暇时光 B．学费 C．精神空虚 D．经济不足
【单选题】
( ) 33. Why did Natalie Smith pay for the six cars behind her?
A. She had seven tickets.
B. She hoped to please others.
C. She knew the car drivers well.
D. She wanted to show kindness.
【单选题】
( ) 34. Judy Foreman copied down the phrase because she ___ .
A. thought it was beautifully written
B. wanted to know what it really meant
C. decided to write it on a warehouse wall
D. wanted her husband to put it up in the classroom
【单选题】
( ) 35. Who came up with the phrase according to the passage?
A. Judy Foreman. B. Natalie Smith. C. Anne Herbert D. Alice Johnson.
【单选题】
( ) 36. What can we infer from the last paragraph?
A. People should practice random kindness to those in need.
B. People who receive kindness are likely to offer it to others.
C. People should practice random kindness to strangers they meet.
D. People who receive kindness are likely to pay it back to the giver.
【单选题】
( ) 37.The greatest river for navigation is ___________.
A. the Nile B. the Amazon C. the Mekong D. the Mississippi
【单选题】
( ) 38. From a dam, people can use the water for ___________.
A. keeping the rivers clean B. only making electricity
C. irrigation and making electricity D. washing clothes
【单选题】
( ) 39. The water in the river is polluted because of _____________.
A. people's drinking water too much B. people's swimming in the river too much
C. chemicals and other materials D. people's building a dam across a river
【单选题】
( ) 40. The best title of the passage is ___________.
A. Rivers in Cities B. The importance of Rivers
C. Transportation D. Natural Resources
【单选题】
) 1. Even Tony’s six-year-old son asked him ______ smoking.
A. stops B. stopped C. to stop D. stopping
【单选题】
2.—What do you think of the lecture of Li Yang’s Crazy English?
— I think it’s _______ , but someone thinks it’s much too ________.
A. wonderful enough; bored B. enough wonderful; boring
C. enough wonderful; bored D. wonderful enough; boring
【单选题】
3.—He didn’t go to the lecture this morning, did he?
— _____ ．Though he was not feeling very well．
A. No, he didnt B. Yes; he did C. No, he did D. Yes, he didnt
【单选题】
4. If you read a lot, your life ______ full of pleasure.
A. will be B. is C. be D. was
【单选题】
5. The black bag _________ be Annas. She has a blue one.
A. should B. cant C. wouldnt D. could
【单选题】
6. Susan, why are you still here? They are all ready to start.
Im sorry, but I _________ when to start.
A. dont tell B. wasnt told C. didnt tell D. havent told
【单选题】
7.—Why dont you choose the red tie?
—For me, it doesn’t _____ my shirt very well．
A. fix B. accept C. compare D. match
【单选题】
8. — Could you tell me ______? I must find him．
— Sorry．I don’t know．But he was here just now．
A. where Tom was B. where Tom is
C. where has Tom gone D. where can I find Tom
【单选题】
9. —What did Mr Green say to you?
— What a heavy rain! How did you come here? He asked________.
A. at all B. in fact C. in surprise D. as a result
【单选题】
10. I often see Tom on the playground．When I passed the playground yesterday, I saw him ．
A. play; playing B. to play; play C. playing; to play D. playing; play
【单选题】
11. — Mum, could I have ____________ to drink?
— Oh, dear．You can only drink some water．There is _________ in the kitchen．
A. anything; else something B. anything; something else
C. something; else nothing D. something; nothing else
【单选题】
12. We all know that learning a foreign language _______ time and effort.
A. requires B. reduces C. removes D. repeats
【单选题】
13. Her son __________ Coke, but now he __________ milk．
A. is used to drinking; used to drink B. used to drink; uses to drink
C. used to drink; is used to drinking D. is used to drink; is drinking
【单选题】
14. I don’t know the teacher is talking with Miss Wang．
A. what B. whom C. who D. which
【单选题】
15.Millie does __________ that many people are thankful to her．
A. such an important and helpful job B. so important and helpful work
C. a very important and helpful job D. such an important and helpful work
【单选题】
16. I think eating more vegetables is good _______ our health.
—Yes, I agree _______ you.
A. at, to B. for, with C. to, to D. for, to
【单选题】
17. I often go on holiday with my parents _____ summer.
A. in B. at C. on D. of
【单选题】
18. I called you at 4:00 yesterday afternoon, but nobody answered.
Sorry, I ______ with my friends at that time.
A. had swum B. swam C. would swim D. was swimming
【单选题】
19.––Who is on the playground? ---__________．
A. Never B. None C. No one D. A lot
【单选题】
20. The schoolboy ______ a blind man cross the street yesterday.
A. helps B. helped C. will help D. has helped
【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.
A. How B. How an C. What D. What an
【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
【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
【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
【单选题】
25. — David, look at the man in white over there．Can you tell me _______ ?
—He is a doctor．
A. who is he B. who he is C．what does he do D. what he does
【单选题】
( ) 26.With help from a Mr. H, you can__________.
A. stop wearing your watch B. get new books and objects
C. finish your homework on time D. know when parents or teachers are near
【单选题】
( ) 27. A PENGO WATCH CONTROL can help you to ______________.
A. repair your TV B. put away your books and objects
C. become a James Bond D. get a daily weather report
【单选题】
( ) 28. You can get your Mr. H for___________.
A. $299 B. $499 C. $199 D. $99
【单选题】
( ) 29. When was canned food invented?
A. In 1870. B. In 1810. C. In 1902. D. In 1926.
