相关试题
【判断题】
D105B中白油进行精制后其含水量要<20ppm
【判断题】
低压蒸汽从汽蒸器底部进入，用于分解催化剂及CAT的残余物，同时可脱除PP粉料中夹带的丙烯，丙烷和丁烯
【判断题】
干燥单元的聚丙烯粉料为易燃，易氧化的物料，有粉尘爆炸的危险，必须正压操作
【判断题】
D601，D602排放气体经CY601后排出火炬，CY601底部的粉料排至D601中
【判断题】
均聚物生产之后利用催化剂的残余活性将乙烯和丙烯共聚生成乙丙橡胶和聚乙烯
【判断题】
序列共聚是得到抗冲PP的最有效方法，生产方案是在两个反应器分两步进行
【判断题】
一般商品化的抗冲牌号乙烯含量在6-15%之间，对应的橡胶为5-25%
【判断题】
E502冷却效果与D502干燥效果无关
【判断题】
紧急排放系统利用闪蒸和旋风分离器的原理，接受事故状态下的物料排放
【判断题】
从HV30101和HV30001来的排放气可以进D602，也可以进D601
【判断题】
K501可用来压缩某些腐蚀性介质，效率较高
【判断题】
在环管反应器开车时，先启动轴流泵，再投用轴流泵冲洗丙烯
【判断题】
对于均聚物来说由低MFR牌号向高MFR牌号过渡时，对氢气流量的设定从理论上说，所设的值越大，切换时间越短
【判断题】
在由无规聚丙烯到均聚过程中，首先应调整MFR，然后停供乙烯，反应温度、压力等
【判断题】
如果界区丙烯中断，则丙烯精制部分应按临时停车处理，倒空各精制设备中的丙烯
【判断题】
我们可以利用循环水对E504内的气相丙烯进行冷却
【判断题】
稳定剂是通过P501加入到D501中的
【判断题】
D507的出料程序，I508由定时器KC50300或HS50300启动
【判断题】
在三元牌号生产时，C402底丙烯去界区丙烯进料线
【判断题】
聚合物细粉（小于74微米）的最小爆炸浓度大约为0.10～0.20kg/m3
【判断题】
气流干燥器的干燥原理主要是利用对流传热
【判断题】
正常生产情况下，C501需要一定量连续的补充水
【判断题】
生产均聚产品时D502操作温度是100-120℃
【判断题】
当D604液位触发LAL60101，D604需要进行补水
【判断题】
D607废油处理时，只进行TEAL的中和
【判断题】
TEAL中和是放热反应，所以之前不需要加热引发
【判断题】
正常操作中，D601，D602，D603是空的
【判断题】
水分子比丙烯分子小且有极性，所以水分子能进入分子筛的微孔里，达到分离干燥的目的
【判断题】
从SR301出来的粉料大约含有3%的单体
【判断题】
无规共聚物的聚丙烯的分子链上乙烯分子大部分是相连的
【判断题】
D502干燥器高料位，会引发I515联锁，关LV50001
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— Wow! This is a marvelous room! I’ve never known you’re so artistic.____
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B. Don’t mention it.
C. Thanks for your compliments.
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B.
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Are you feeling better today, Jack?___
A. There must be something wrong.
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Thank you so much for your lovely gift.___
A. Never mind.
B. I'm glad you like it.
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Good morning, John. How are you doing?___
A. I'm pleased
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C. Not so bad. And you?
D. How do you do?
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How do you do?___
A. Fine, thank you.
B. How do you do?
C. Not too bad.
D. Very well.
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Good-bye for now.___
A. The same to you.
B. That's OK
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Hello, how are you?___
A. Hello, how are you?
B. How do you do?
C. Fine, thank you.
D. That's OK.
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I didn't mean to do that. Please forgive me。___
A. Not too bad.
B. That's all right
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Thank you for your invitation.___
A. It doesn’t matter.
B. It's a pleasure.
C. It's a small thing.
D. I'll appreciate it.
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What a beautiful dress you have on today!___
A. It is suitable for me.
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C. You want to have one, too?
D. Thank you.
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I think he is a good lecturer.___
A. Sorry, it doesn’t matter.
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— What's the matter, dear?___
A. I didn't go to school.
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Good morning, may I speak to Mark, please?___
A. Who's there?
B. Who's that speaking?
C. Who are you?
D. Who wants to speak to Mark?
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Let me introduce myself. I'm Steward.___
A. What a pleasure.
B. Pleased to meet you.
C. I don't know.
D. Thanks a lot.
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Let's go to the library this afternoon.___.
A. Yes, that's right.
B. No. I can't.
C. What about you?
D. That's a good idea.
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What does Tom's wife do for a living?___.
A. She is a doctor.
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C. She has a happy life.
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How tall is your sister?___
A. She is not very well.
B. She is 28 years old.
C. She is very nice.
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What do you think of this novel?___
A. I've read it.
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How much is this necklace?___
A. It's very nice.
B. It's a birthday present from my parents.
C. It costs fifty pounds.
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How can I get to the cinema?___
A. It's very far.
B. Yes, there is a cinema near here.
C. It's well known.
D. Go down this street and turn left.
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What's the matter, John?___
A. I failed my French test
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C. Nothing's wrong with him.
D. I don't think I can.
【单选题】
What are you majoring in?___
A. In a university.
B. Very hard.
C. Mathematics.
D. At nine in the morning.
【单选题】
Are you going on holiday for a long time?___
A. It was a long time.
B. Two weeks ago.
C. No. Only a couple of days.
D. Not long time ago.
【单选题】
Is Mary there?___
A. Speaking.
B. I'm not Mary.
C. Who are you?
D. Mary is well today.
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What day is today?___
A. It's March 6.
B. It's a fine day today.
C. It's March.
D. It's Monday.
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Is that seat taken?___
A. Please don't worry.
B. I don't think so.
C. Why not?
D. It's very nice.
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Thank you for calling.___
A. Don’t mention it.
B. That's fine.
C. Nice talking to you.
D. Call back again.
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How are you getting on today?___
A. Very well.
B. How do you do?
C. I'm a doctor.
D. Nice to have known you.
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How's your family?___
A. Thanks all the same.
B. Thanks for calling.
C. Not too bad.
D. Don't mention it.
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- How is it that you are late for class again?___
A. Because I missed the bus
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C. Yes, it is quite wrong
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- Excuse me. Could you spare me a few minutes? - ___
A. Of course.
B. Of course not.
C. I am sorry to hear that.D.Yes. I'm busy now.
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- It's very thoughtful of you to give me a ride. ___
A. It's my pleasure.
B. Take it easy.
C. Sure.
D. Never mind.
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- This is heavy! What's in it? ___
A. I think you don't like it.
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___ I'd like to place an order please.
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B. I can help you.
C. What are you doing?
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- Do you know the girl over there?___
A. How can I know?
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- Shall we go out for dinner tonight?____
A. No, you can't.
B. Yes, please.
C. Thank you, I don't want to.
D. Sorry, I have a report to finish.
