精馏塔中,温度分布主要反映物流的(),而总的级间流量分布则主要反映()的限制。

题型:填空题

问题:

精馏塔中,温度分布主要反映物流的(),而总的级间流量分布则主要反映()的限制。

考点:化学分离工程分离工程基础知识分离工程基础知识题库
题型:填空题

非典型性肺炎是由病毒的变异引起的,抗生素对此病之所以不起作用是因为“抗生素”是(  )

A.细菌、真菌

B.某些真菌产生的杀死致病细菌的物质

C.某些真菌产生的杀死真菌的物质

D.细菌产生的杀死细菌的物质

题型:填空题

使用人阻碍房屋所有人对危险房屋采取解危措施而造成事故的,使用人应承担( )责任。

A.民事

B.行政

C.刑事

D.经济

题型:填空题

第三部分:阅读理解(共20小题;每小题2分, 满分40分)

阅读下列短文,从每篇短文后所给各题的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

Mr. Whitson taught sixth-grade science. On the first day of class, he gave us a lecture about an animal called the Cattywampus, a nocturnal (夜间活动的) animal that was wiped out during the Ice Age. He passed around a skull as he talked. We all took notes and later had a quiz.

When he returned my paper, I was shocked. There was a big red “X” through each of my answers. There had to be some mistakes! I had written down exactly what Mr. Whitson said. Then I realized that everyone in the class had failed. What had happened? Very simple, Mr. Whitson explained. He had made up all that story about the Cattywampus. The information in our notes was, therefore, incorrect. Did we expect credit for incorrect answers? Needless to say, we were outraged. What kind of text was this? And what kind of teacher is he?

We should have figured it out, Mr. Whitson said. After all, at the very moment he was passing around the Cattywampus skull (in truth, a cat’s), hadn’t he been telling us that no trace of the animal remained? He had described its amazing night vision, the color of its fur and any number of other facts he couldn’t have known, he had given the animal a ridiculous name, and we still hadn’t been suspicious. The zeroes on our papers would be recorded in his grade book, he said. And they were. Mr. Whitson said he hoped we would learn something from this experience. He told us not to let our minds go to sleep, and to speak up if we ever thought he or the textbook was wrong.

We carded our new skepticism (怀疑主义) into all our classes. This caused problems for the other teachers, who weren’t used to being challenged. Our history teacher would be lecturing about something, and then there would be clearings of the throat and someone would say “Cattywampus”.

If I’m ever asked to propose a solution to the crisis in our schools, it will be Mr. Whitson. I haven’t made any great scientific discoveries, but Mr. Whitson’s class gave me and my classmates something just as important: the courage to look people in the eye and tell them they are wrong. He also showed us that you can have fun doing it.

51.The best title for this passage would probably be _______.

A. Cattywampus                                      

B. An interesting and unforgettable Lesson

C. A new teaching method                        

D. The Best Teacher I Ever Had

52.The underlined word outraged in the second paragraph here means _______.

A. angry                            B. excited                     C. disappointed             D. discouraged

53.From this passage, we know that Mr. Whitson was a teacher _______.

A. difficult to get along with                                   B. creative in teaching  

C. fond of being challenged                          D. full of energy and enthusiasm 

54.We can infer from the passage that _______.

A. teachers and textbooks are not always right

B. Cattywampus could be found in the Ice Age

C. the history teacher didn’t like to be challenged

D. Mr. Whitson always made a bad impression on his students

题型:填空题

题目:初产妇,26岁,妊娠40周,头位,自然临产,产程顺利,宫口开大8cm,胎头棘下2cm,自然破水,羊水黄绿。破水5分钟后患者自觉呼吸困难,烦躁,发绀,血压80/40mmHg,心率126次/分,呼吸45次/分,胎心120次/分。

应以下述哪种方法终止妊娠

A.立即剖宫产

B.密切观察

C.穿颅术

D.产钳助产

E.缩宫素引产

题型:填空题

早期中心型肺癌诊断阳性率较高的方法是()

A.胸片

B.普通断层片

C.胸部CT

D.纤维支气管镜

E.胸部透视

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