问题 问答题 简答题

反应器分布板压差4PDI4001-36控制的意义是什么?

答案

参考答案:

反应器分布板压差是判断反应器分布板畅通情况主要判断参数,其数值大小直接影响流化状态,同时也是判断反应器结块情况和循环气实际流量的辅助参数。

反应器分布板压差不是在短时间内调整的参数,当数值有异常变化时,应根据床层内其他各点压差、循环气流量、循环回路压降状况等参数作出综合的判断,作出相应的调整,以使该参数恢复正常。

阅读理解

阅读理解。

     Sally was a student. It was going to be her mother's birthday. She wanted to buy her a present that would

be nice and useful but not expensive.

     She went shopping after a quick and simple lunch. After she looked for half an hour, she found a shop that

was selling cheap umbrellas, and she decided to take a black one.

     She thought, "Mom can carry it when she is wearing clothes of any color." So she bought a lovely black

umbrella and took it to school with her until her class finished.

     On her way home on the train she felt hungry because she had so little for lunch. So she went to the buffet

car (餐车). She left the umbrella on her seat. But when she got back, it had gone!

     Sally began to cry. The other passengers felt very sorry for her and asked what the matter was. She told

them the black umbrella she bought for her mother had gone, and she had to get off at the next station. After

the three passengers heard this, they asked her for her mother's address so that they could send the umbrella

to her if someone took it by mistake and brought it back.

     And now a week passed. Sally got a letter from her mother. It said "Thank you very much for your lovely

gifts, but why do you send me three black umbrellas?"

1. Which sentence has the same meaning as "Mom can carry it when she is wearing clothes of any color"?

A. Mom must carry it when she is wearing any clothes.

B. Mom is beautiful in any clothes.

C. The color of the umbrella is OK for Mom's clothes of any color.

D. Mom can buy any clothes that she likes to wear.

2. Where did Sally find the umbrella missing?

A. On the train.

B. At her school.

C. At the train station.

D. In the shop.

3. From the passage, we can know that _____.

A. Sally's mother would write to her if she didn't receive the gift

B. one of the umbrellas must be sent by Sally

C. the three umbrellas were sent by the three passengers

D. nobody on the train took away the umbrella

4. The best title for the story is "_____".

A. A lucky girl

B. The story of an umbrella

C. On the train

D. A happy mother

5. The writer wants to tell us _____.

A. we should look after our things when we are traveling

B. if we show our love to others, we can get love from others

C. we should often send our parents gifts

D. it's no use crying when we are in trouble

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