相关试题
【判断题】
[29]超高压蒸汽在压缩区的用户是C-501和C-601。
【判断题】
[30]当设备中的流体处于静止状态时，其阻力为零，因此，此时流体的粘度为零。
【判断题】
[31]四氟化碳和二氧化碳都可以扑灭电气火灾。
【判断题】
[32]乙烯在空气中的爆炸范围比丙烯在空气中的爆炸范围窄。
【判断题】
[33]任何可逆反应，在其他条件不变的情况下增加某反应物浓度都可以使平衡向增加生成物的方向进行。
【判断题】
[34]碱洗塔弱碱段的塔盘是浮阀塔盘。
【判断题】
[35]碱洗塔弱碱段的塔盘是泡罩塔盘。
【判断题】
[36]碱洗塔强碱段的塔盘是浮阀塔盘。
【判断题】
[38]碱洗塔水洗段的塔盘是泡罩塔盘。
【判断题】
[40]为减少乙烯损失，乙烯精馏塔塔釜循环乙烷要求乙烯含量不超0.1mol%。
【判断题】
[43]当出现低温用户冻堵时，应在冻堵下游处注甲醇。
【判断题】
[44]三机全停后恢复顺序应为丙烯机→乙烯机→裂解气压缩机。
【判断题】
[45]段间罐液位高高，裂解气压缩机会联锁停车。
【判断题】
[46]在选择列管式换热器时，具有腐蚀性的物料应走管外。
【判断题】
[47]板翅式换热器较列管式换热器传热效率低。
【判断题】
[49]冷泵原始启动必须先干燥，后预冷。
【判断题】
[50]隔膜泵原始启动前必须关入口阀，校正零点。
【判断题】
[51]复水泵起动后可从入口导淋排放确认是否吸入管线灌满。
【判断题】
[52]离心泵冷却水管线布置为上进下出。
【判断题】
[53]三机停车后都要进行盘车，以防止静止时发生轴弯曲。
【判断题】
[54]三台透平压缩机组最高操作压力为11.97MPa，最低温度为-101.3℃。
【判断题】
[55]复水器的液位控制采用串级调节。
【判断题】
[56]丙烯压缩机蒸汽透平停车时，应先停密封蒸汽，再破坏真空。
【判断题】
[58]裂解气急冷温度越低越好，利于能量回收及迅速终止二次反应。
【判断题】
[60]蒸馏是一个传质与传热同时进行的过程。
【判断题】
[61]大检修时，当塔内有机物含量分析合格后即可交付检修了。
【判断题】
[62]强碱段、中碱段和弱碱段的补水来自新鲜PW。
【判断题】
[63]当乙烯压缩机紧急停车后，即需要进行电动盘车到温度下降为止。
【判断题】
[64]乙烯塔气相进料位置低于液相进料位置。
【判断题】
[65]往复泵的扬程理论上是无限大的。
【判断题】
[66]主蒸汽压力突降或中断不会引起压缩机喘振。
【判断题】
[67]闪点高于45℃的液体为易燃液体。
【判断题】
[68]乙烯的爆炸极限为2.7%～36%。
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The Foreign Minister made an excellent ___ on the current international situation.
A. committee
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Over a third of the population was estimated to have no ___ to the health service.
A. assessment
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I think I would have died of ___.
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He had an ___ at a restaurant in Greek Street at eight.
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These companies often encounter many ___ impediments to investment.
A. invisible
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30 percent of reptiles, birds, and fish are currently ___ with extinction.
A. treated
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They have a stronger ___ of the importance of economic incentives.
A. appreciation
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I believe I am capable of ___ the political consequences accurately.
A. guessing
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When he opened the door, he used too much force and ___ the key.
A. trailed
B. varied
C. wicked
D. twisted
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I’m very sorry to have ___ you with so many questions on such an occasion.
A. offended
B. impressive
C. bothered
D. interfered
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It is sometimes difficult for young people from the countryside to ___ well to life in the big city.
A. suit
B. adapt
C. regulate
D. coordination
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Our guide gave us a detailed ___of this painting but we still do not understand.
A. authority
B. interpretation
C. instruction
D. institution
【单选题】
If you want to ___ the wood, cut it with the grain, not against it.
A. break
B. burn
C. split
D. divide
【单选题】
They have a stronger ___ of the importance of economic incentives.
A. appreciation
B. learning
C. conception
D. idea
【单选题】
I believe I am capable of ___ the political consequences accurately.
A. guessing
B. betting
C. calculating
D. computing
【单选题】
30 percent of reptiles, birds, and fish are currently ___ with extinction.
A. treated
B. threatened
C. danger
D. threatening
【单选题】
Workers should occasionally walk around, ___ and avoid prolonged periods at the desk.
A. pull
B. lengthen
C. strain
D. stretch
【单选题】
These companies often encounter many ___ impediments to investment.
A. invisible
B. edible
C. feasible
D. capable
【单选题】
Running a kitchen ___a great deal of discipline and speed.
A. including
B. involving
C. involves
D. composes
【单选题】
He had an ___ at a restaurant in Greek Street at eight.
A. engagement
B. engage
C. contract
D. promise
【单选题】
I think I would have died of ___.
A. embarrass
B. embarrassing
C. embarrassed
D. embarrassment
【单选题】
He saw the publication of this book as an embarrassing invasion of his ___.
A. secret
B. privacy
C. private
D. piracy
【单选题】
The trade imbalance is likely to rise again in 2020. ___ a new set of policy actions will be required soon.
A.
B. ecause B. Nevertheless
C. Hence
D. Therefore
【单选题】
Stratford police refuse to comment ___ whether anyone has been arrested.
A. about
B. on
C. at
D. with
【单选题】
The world will be different, and we will have to be prepared to ___ to the change.
A. adopt
B. adapt
C. accustom
D. adept
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The company has launched a campaign of television ___ and leaflets.
A. commercials
B. commences
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The general secretary may ___ the president at official ceremonies.
A. present
B. represent
C. representative
D. stand
【单选题】
He ___ her arms behind her back and clipped a pair of handcuffs on her wrists.
A. dragged
B. pulled
C. stretched
D. twisted
【单选题】
Suppose that when I come back in ten years’ time all these old houses ___ down.
A. will have been pulled
B. will have pulled
C. will be pulling
D. will be pulled
【单选题】
The picture exhibition bored me to death. I wish I ___ to it.
A. have not gone
B. did not go
C. had not gone
D. should not have gone
【单选题】
An investigation was made into the accident ___ fifty people were killed.
A. for that
B. where
C. when
D. in which
【单选题】
___ with the picture, Mary tore it to pieces.
A. Dissatisfying thoroughly
B. Being thoroughly dissatisfied
C. To dissatisfy thoroughly
D. To be thoroughly dissatisfied
【单选题】
She was so angry that she felt like ___ something at him.
A. to throw
B. to have thrown
C. throwing
D. having thrown
【单选题】
If you want to know the train schedule, please ___ at the booking office.
A. acquire
B. inquire
C. request
D. require
【单选题】
My brother’s plans are very ___; he wants to master English, French and Spanish before he is sixteen.
A. arbitrary
B. aggressive
C. ambitious
D. abundant
【单选题】
Housewives who do not go out to work often feel they are not working to their full ___.
A. capacity
B. strength
C. length
D. possibility
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Water and air are ___ to human beings. We cannot live without them.
A. harbor
B. function
C. definite
D. essential
【单选题】
Our challenge is to ___ those voters and inspire them to join our cause.
A. motion
B. motive
C. motivate
D. motivation
