问题
单项选择题
下列对塔盘为泡罩的塔式反应器的优缺点分析中，不正确的是（）。
A．传质面积大，气—液接触比较充分，塔板效率高
B．气液比可有较大的变化，即操作弹性大
C．具有较高的生产能力，适于大规模生产
D．结构简单造价低
答案
参考答案：D
解析：
此题已不在新大纲考核范围之内。
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下列对塔盘为泡罩的塔式反应器的优缺点分析中，不正确的是（）。
A．传质面积大，气—液接触比较充分，塔板效率高
B．气液比可有较大的变化，即操作弹性大
C．具有较高的生产能力，适于大规模生产
D．结构简单造价低
参考答案：D
解析：
此题已不在新大纲考核范围之内。
| 完形填空。 My life is always filled with sadness and little joy. However, no matter what happens, I can face it bravely. Last year, I couldn't believe the 1 that I entered the No. 1 Middle School in my hometown. Then I rushed to my home and told my parents. But my father didn't seem as 2 as I was. He just kept smoking without saying a word and my mother put her head down and couldn't help 3 . I knew very well what my family was 4 . My mother had been ill in bed for 2 years. We lived a hard life and I couldn't go on my schooling. I felt so upset but I 'could say 5 to my parents. I decided to help my father with his work 6 my family. To my surprise, things completely changed _ 7 . the beginning of the new term. My head teacher came to my family with some money. which' had been 8 by my schoolmates. He encouraged me, "Always have a dream." with tears in my eyes, I stepped into the school. I have been studying hard since I entered the school. Whenever I meet difficulties, I always 9 my teacher and schoolmates. I have a college dream and I must work hard for it, no matter 10 hard the life is. Just as a great man says. "When one door shuts, another opens in life. " | ||||
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