问题 问答题 论述题

氢油比对抽余油加氢有什么影响?

答案

参考答案:

氢油比是指氢气体积量与进料量的体积之比。氢油比大,氢分压大,利于加氢反应的进行,同时能及时带走反应器床层的反应热,防止油在催化剂表面结焦,保护催化剂,大量的氢气与进料混合通过反应器,使原料经过催化剂床层时分布更均匀。但是太大的氢油比减少了油和催化剂的接触时间,不利于反应.太低的氢油比不仅不利于反应的进行,而且催化剂易结焦.本装置氢油比设计为180:1(体积)。

单项选择题 案例分析题

病历摘要:患者,女,46岁,因“发热2天,昏迷3小时”由基层医院转诊。2天前,患者于受凉后出现流涕,咳嗽,数小时后发热,最高达41.2℃,自服药(具体不详)无效,遂到当地医院就诊,其时一般情况好,体查:T:39.2℃,BP:100/60mmHg,R:18次/分,P:90次/分,心肺腹未查及异常。经抗炎、补液,体温下降,余症状未见好转,而意识逐渐模糊,血压下降,经使用白蛋白,血压稍有回升,很快又下降。3小时前患者昏迷。既往史:体质差,易“感冒”且均较他人重,有濒死感。常述怕冷,易疲乏、落发多。月经生育史:已绝经多年(具体不详)。G1P1A0,22年前分娩一男婴时大出血,经抢救后好转。体查:T:36.2℃,BP:80/40mmHg,R:12次/分,P:60次/分。昏迷。四肢冰凉,双肺呼吸音清,HR:60次/分,心音低,腹无异常。头发稀少,腋毛脱失,阴毛未见。辅助检查:血常规:WBC:5.3×109/L,NEUT:2.2×10/L,Hb:96g/L,Plt:140×109/L;生化:Na:125mmol/L,K:4.9mmol/L,Glu:2.4mmol/L;

糖皮质激素起始按什么剂量和方式给予?()

A.8AM给全天剂量的2/3,4PM给全天剂量的1/3

B.8AM给全天剂量的1/3,4PM给全天剂量的2/3

C.8AM给全天剂量的2/3,睡前给全天剂量的1/3

D.8AM给全天剂量的1/3,睡前给全天剂量的2/3

E.8AM给全天剂量的1/2,4PM给全天剂量的1/2

F.8AM给全天剂量的1/2,4PM给全天剂量的1/2

阅读理解

Today, almost everyone has heard of Harry Potter. The books detailing his experiences at Hogwarts School of Witchcraft and Wizardry have aroused passion, creativity, and interest in reading throughout the world.

But have you ever considered why you are a fan of the Harry Potter series?

JK Rowling has created a list of characters and an environment for them to inhabit that appeals to both adults and children. 

The fantasy aspect of the wizarding world expands the imagination, and takes the mind to new and exciting places. Anything could happen there. Her stories contain parts of the believable and unbelievable, changing the predictability that readers commonly come across and bear in fiction. 

The main theme of the series, including good versus evil, prejudice, love, death, sacrifice, friendship and loyalty, in actuality contributes to the ever-lasting nature of the stories. At the same time, these themes remind us of classic literature, offering mature readers tales that wear like a comfortable pair of shoes, while introducing younger readers to concepts they will meet throughout their lives. 

Much of the appeal also comes from the characters. In each book, JK Rowling introduces and describes the characters in such a way that we wonder not only about their futures, but also about their pasts. Even supporting characters are suddenly more than just extras in the background. And what of Harry Potter himself? We care about Harry, because we watch him grow from an innocent boy to a powerful wizard. We see him as both Hero and Victim. He experiences endless love and extreme pain, and as readers, we experience them with him.

This perfect combination of emotion, suspense and fantasy, together with the fact that JK Rowling is a superb storyteller is the reason why we are Harry potter fans. People are fond of Harry Potter series. With books like these, it’s hard not to be.

小题1: Harry Potter series become popular partly because ____________.

A.they remind us of the childhood and environment we had in the past

B.they take us to a world beyond our imagination and expectation

C.they offer us ever-lasting nature of the stories

D.they set an example of hero for us to follow小题2:What does the underlined sentence in Paragraph 6 mean?

A.The supporting characters are not necessary in the story.

B.Readers care only about Harry but not those supporting characters.

C.Even the supporting characters are attractive in the story.

D.Those supporting characters only appear all of a sudden.小题3:The themes of the Harry Potter series do not contain ____________.

A.prejudice and love

B.good and evil

C.death and sacrifice

D.safety and peace小题4:People care for Harry Potter because ____________.

A.they think of classic literature when reading the story

B.they find different experiences from theirs on Harry

C.they share the experiences with Harry

D.they like JK Rowling’s description very much