问题
问答题 简答题
流化床形成的必备条件是什么？
答案
参考答案：
必须具备以下三个条件：
1）要有一个容器，而且容器中还要设置使流体分布良好的分布器，以支撑床层，并使其流化良好。
2）容器中要足够量的颗粒大小、比重耐磨性能与满足要求的固体颗粒。
3）要有流化介质，就是能够使用固体颗粒流化起来的流体，而且流体要有足够的速度，使固体颗粒流化。
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流化床形成的必备条件是什么？
参考答案：
必须具备以下三个条件：
1）要有一个容器，而且容器中还要设置使流体分布良好的分布器，以支撑床层，并使其流化良好。
2）容器中要足够量的颗粒大小、比重耐磨性能与满足要求的固体颗粒。
3）要有流化介质，就是能够使用固体颗粒流化起来的流体，而且流体要有足够的速度，使固体颗粒流化。
第二节完型填空（共20小题；每小题1.5分，满分30分） 阅读下面短文，掌握其大意，然后从21—40各题所给的四个选项（A、B、C和D）中，选出最佳选项。 One day a small group of young people were at a wildlife park on a field trip. “Oh, look at her, she's so beautiful.” All of us 21 a cheetah（印度豹）named Subira in respect－except a teenage boy called Cory in the back row, who seemed to be 22 to himself in impatience. When several members of the group turned in his 23 , he brushed the front of his T-shirt as though to 24 dust, and, in a gesture clearly meaning to 25 us, rolled up the right sleeve (袖子）of his shirt, further showing his well-developed 26 . Cory had 27 of playing professional baseball someday. No one doubted Cory's 28 . But that was before the car accident. Not only did Cory lose a 29 in the accident but his hope and his spirit. Seeing such a large audience, Subira couldn’t wait to give the crowd a 30 of her skills. “How fast she runs!” one shouted. “But she only has three legs.” one cried. No one was more 31 than Cory. He stared at the animal with the missing leg and he smiled, tears of hope in his 32 . Looking 33 into Cory' s face, the organizer explained “It was soon after she came to us that she showed her own worth－a 34 gift of love and spirit. In the past few years, the gift of Subira has 35 people around the world，and without words Subria has become our most persuasive 36 , and the most priceless gift.” Cory asked 37 , “Can I touch her?” As the rest of the group looked on in amazement, the boy wheeled himself over to the large gate and 38 to push it open. The expression on his face was one of great 39 . It was clear that Cory had 40 the gift of Subira. 21. A. listened to B. laughed at C. smiled at D. stared at 22. A. talking B. wondering C. sitting D. lying
25. A. amuse B. impress C. satisfy D. frighten 26. A. fingers B. body C. hands D. muscles 27. A. talked B. dreamed C. decided D. expected 28. A. smartness B. speed C. ability D. mind 29. A. leg B. arm C. hand D. promise 30. A. memory B. speed C. show D. quality 31. A. astonished B. interrupted C. terrified D. disappointed 32. A. heart B. face C. expression D. eyes 33. A. bravely B. frankly C. directly D. immediately 34. A. unique B. common C. right D. difficult 35. A. excited B. warned C. described D. touched 36. A. newspaper B. spokesman C. program D. teacher 37. A. calmly B. softly C. bitterly D. proudly 38. A. wished B. decided C. begged D. struggled 39. A. puzzle B. disappointment C. satisfaction D. shame 40. A. received B. refused C. seen D. found |