问题 问答题 简答题

分馏塔的塔高和塔径对处理能力和产品质量有什么影响?

答案

参考答案:

塔径主要影响生产能力,塔高主要影响生产纯度。对一定的塔来说,空塔流速是有一定的限制的,塔径越大,则允许的塔内蒸汽负荷越大,即生产能力就越大,所要分离的一对关键组份的分离度愈高,电需要部分冷凝,部分汽化的次数越多,需要的理论塔板数愈多,塔就愈高。

阅读理解

阅读理解

Problem:

I'm bored. We have a day off because of the heavy rain. If you didn't go to school today, what would you do? Why?LindaSome advice:

       If I were you, I would be at home doing something, such as making my bed or helping my mother do

some chores. That way, my room would be clean and my parents would be happy.Tina  I would do what

I love! Maybe I would help Mom do some cooking. I would learn how to make dumplings.Kathy  I don't have enough time in one day to do all the things I want to. People who get bored usually don't have a good imagination (想象力). There are lots of different books to read, websites to surf, people to visit and things to make.June  Well, if I were you, I would watch a good movie and then take a good nap (小睡). Your

brain (脑子) and body will then be relaxed and ready for classes the next day.

根据材料内容,选择最佳选项。

1. What's Linda's problem?

A. She doesn't have a job.

B. She feels bored.

C. She hates rainy days.

D. She feels awful at school.

2. Who would watch a movie if she had a day off?

A. June.

B. Kathy.

C. Lisa.

D. Tina.

3. What would Kathy probably like to do on her day off?

A. She would like to cook.

B. She would like to sleep.

C. She would like to read.

D. She would like to watch TV.

4. June would do all of the following EXCEPT      . 

A. visit friends

B. surf the Internet

C. read books

D. lie in bed

5. What do we know from the reading?

A. Tina doesn't like to do any housework.

B. Kathy likes to do the same things as Tina.

C. Lisa thinks it would be helpful to Linda to get relaxed.

D. June used to be busy, but now she has enough time to relax.

单项选择题 A1/A2型题