试卷19
重庆工商大学19级化工原理试卷
重庆工商大学19级化工原理试卷一、填空题1、层流与湍流的本质区别是（）A、湍流流速大于层流流速B、流动阻力大的为湍流，流动阻力小的为层流C、层流的雷诺数小于湍流的雷诺数D、层流无径向脉动，而湍流有径向脉动离心泵开动以前必须充满液体是为了防止发生（）A、气缚现象B、气蚀现象C、汽化现象D、气浮现象3、银、水、软木的导热系数分别为λ1、λ2、λ3，其大小顺序为（）A、λ1>λ2>λ3B、λ3>λ2>λ1C、λ1>λ3>λ2D、λ3>λ1>λ24、傅里叶定律是（）的基本定律A、对流传热B、热传导C、总传热D、冷凝5、传递的基本方式不包括（）A、热传导B、对流传热C、热辐射D、相变传热6、精馏操作的作用一般是分离（）A、气体混合物B、液体混合物C、互不相容的液体混合物D、气液混合物7、在二元连续蒸馏过程中，若仅精馏段操作回流比R增大，其他条件不变，则所需理论板数将（）A、减小B、增加C、不变D、不确定8、吸收塔的操作线是直线，主要基于（）原因A、物理吸收B化学吸收C、高浓度物理吸收D 低浓度物理吸收9湿度表示湿空气中水汽含量的（）A、相对值B、绝对值C、增加值D减少值干燥操作的经济性主要取决于（）A、能耗和干燥速率B、能耗和热量的利用率C、干燥速率D、干燥介质二、填空题雷诺准数实验显示流体流动两种不同类型：一种为，另一种为温度梯度的正方向为的方向任一截面单位质量流体所具有的、和静压能之和为一常数，称为机械能利用蒸馏分离液体混合物的依据是各组分的不同，吸收则利用各组分的不同分离气体混合物湿空气经预热后，空气的状态参数湿度H ，相对湿度ψ，焓I（填增大，减小，不变）判断题（）离心泵的工作点即泵的最大效率对应的点（）凡遵循牛顿粘性定律的流体称为牛顿型流体3、（）实际流体在流动中机械能是守恒的4、（）低粘度流体在圆形管内作强制湍流，Nu=0.023Re0.8Prn，流体被加热时，n=0.4，被冷却时，n=0.35、（）当被测流体的绝对压强小于外界大气压强时，所用测压仪表称为压强表6、（）恒摩尔气化，即精馏塔内每块塔板的上升蒸汽摩尔流量都完全相等7、（）精馏塔底再沸器相当于一块理论版8、（）用水吸收氧气属于液膜控制的吸收过程（）在Y-X图上，吸收操作线总是位于平衡线的下方10、（）等焓干燥过程又称绝热干燥过程，也称为理想干燥过程计算题1、实验室测定离心泵性能时，采用本题附图所示的定态流动流程，以45m3/h、25℃的清水为工作介质。
马哲试题19
《马克思主义大体原理概论》试卷19一、单项选择题(在每小题的四个备选答案中，选出一个正确答案，并将正确答案的序号填在题干的括号内。
每小题1分，共40分)1、哲学是( )A.科学的世界观和方法论B.科学性和革命性相统一的世界观C.理论化和系统化的世界观D.辩证唯物主义和历史唯物主义2.辩证法发展过程中经历的三种历史形态是( )A.朴素辩证法、唯心辩证法、唯物辩证法B.唯物辩证法、社会辩证法、自然辩证法C.唯心辩证法、系统辩证法、科学辩证法D.自然辩证法、历史辩证法、革命辩证法3.现代西方哲学的两股主要思潮是( )A.唯物主义和唯心主义B.辩证法和形而上学C.人本主义和科学主义D.悲观主义和乐观主义4.古代朴素唯物主义把世界的本原归结为( )A.客观存在的各种物体B.宇宙中存在的一切现象C.物质的具体形态和结构D.某种具体的“原初物质”5.形而上学唯物主义物质观的错误是( )A.否认物质的客观性B.把自然科学的物质结构理论与哲学的物质范畴相混淆C. 否认物质的可知性D.把可直接感知的实物当作世界的本原6.古代哲学家荀子说：“天行有常，不为尧存，不为桀亡”。
这句话表现的哲学道理是( )A.物质运动规律具有普遍性B.物质运动规律具有重复性C.物质运动规律具有稳定性D.物质运动规律具有客观性7.下列各项正确反映物质和运动关系的是( )A.运动是内容，物质是其形式B.运动是现象，物质是其本质C.运动是暂时的，物质是永恒的D.运动是物质的固有属性，物质是运动的主体8.唯物辩证法认为，发展是( )A.事物永不停息的运动变化B.事物从过去到现在再到将来的变化C.事物由低级到高级的运动变化D.事物由小到大、由少到多的变化9.对立统一规律揭示了( )A.事物发展的动力和源泉B.事物发展的状态和形式C.事物发展的方向和道路D.事物发展的两种趋向10.“两点论”和“重点论”统一的原理，要求咱们在社会主义建设中( )A.既要坚持以经济建设为中心，又要做好其他各项工作B.既要坚持四项基本原则，又要实行改革开放C.既要量力而行，又要积极进取D.既要坚定信心，又要有克服困难的准备11.在实际工作中，要注意掌握分寸，防止“过”或“不及”，这在哲学上属于( )A.抓事物的主要矛盾B.确定事物的质C.认识事物的量D.把握事物的度12.在内容和形式的矛盾运动中( )A.内容是相对稳定的，形式是活跃易变的B.内容是活跃易变的，形式是相对稳定的C.内容和形式都处在不停的显著变动状态D.内容的变化总是落后于形式的变化13.马克思主义实践观是从( )A.主观性中把握人的活动的B.客观性中把握人的活动的C.生物性中把握人的活动的D.主观与客观的关系中把握人的活动的14.认识发展过程的第一次飞跃是( )A.从感性认识到理性认识的过程B.从感觉和知觉到表象的过程C.从认识到实践的过程D.从意识到物质的过程15.要正确实现理性认识到实践的飞跃，必须使理论为群众所掌握，化为群众的自觉行动。
专业英语四级模拟试卷19(题后含答案及解析)
专业英语四级模拟试卷19(题后含答案及解析)题型有：1. DICTATION 2. LISTENING COMPREHENSION 3. CLOZE 4. GRAMMAR & VOCABULARY 5. READING COMPREHENSION 6. WRITINGPART I DICTATION (15 MIN)Directions: Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be read at normal speed, listen and try to understand the meaning. For the second and third readings, the passage will be read sentence by sentence, or phrase by phrase, with intervals of 15 seconds. The last reading will be read at normal speed again and during this time you should check your work. You will then be given 2 minute 听力原文：When a person draws an analogy, he or she observes similarities between two things, and usually goes on to suggest the thing which is familiar can help explain the one / which is not or is only partly understood. As in forms of logic, there is also the inference / that the similarities noted imply other probable similarities. Scientists have often described organic processes by analogy. Some analogies are useful and accurate / as far as they go. For example, the comparison of the heart with a pump / or of the kidney with a filter / has helped illustrate the nature and function of these organs. However, analogies that have been proposed to ex plain the nervous system / have been less successful. One aspect of analogies is / that they are limited by the scientific understanding of the time. The mind cannot be compared to a computer, for instance, until there is a computer.1．正确答案：When a person draws an analogy, he or she observes similarities between two things, and usually goes on to suggest the thing which is familiar can help explain the one / which is not or is only partly understood. As in forms of logic, there is also the inference / that the similarities noted imply other probable similarities. Scientists have often described organic processes by analogy. Some analogies are useful and accurate / as far as they go. For example, the comparison of the heart with a pump / or of the kidney with a filter / has helped illustrate the nature and function of these organs. However, analogies that have been proposed to ex plain the nervous system / have been less successful. One aspect of analogies is / that they are limited by the scientific understanding of the time. The mind cannot be compared to a computer, for instance, until there is a computer.PART II LISTENING COMPREHENSION (20 MIN)Directions: In Sections A, B and C you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. Mark the correct answer to each question on your answer sheet.SECTION A CONVERSATIONSDirections: In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow.听力原文：M: Hello, Susan. What are you reading?W: An article on banks and banking.M: Goodness! How boring!W: I find it interesting. Do you know what a bank’s functions are?M: Of course. It cashes my checks when I have any, and it keeps my money when I have any.W: Stop joking. They also transfer funds to other banks within the same country or to banks in foreign coun tries.M: That’s true. I remember I once had to send some money to my sister in Cairo and father sent me to our bank, and it was all very simple.W: And remember that in a bank you can buy travelers’checks, foreign currency and letters of credit.M: Quite right.W: And banks do much more than that. They grant loans to consumers, business firms, and even governments.M: Do you think I could get a loan? I’d like to start my own fashion store in London. You know, I am always keen on fashion.W: Yes. You can mortgage your house to get up to $ 450,000 from the bank.M: The question of banks is an interesting one.W: Sure it is.M: I’d like to read that article once you’ve finished with it, if you don’t mind.2．What is one service that banks do not provide?A．Cashing checks.B．Granting loans to major international organizations.C．Selling traveler’s checks.D．Transferring funds.正确答案：B3．The man asked about bank loans because he_________.A．was considering taking advantage of bank loansB．wanted to obtain a loan of ＄450,000 from the bankC．found the topic interestingD．wanted to send some money to Cairo正确答案：A4．How did the man like the topic of banks and banking?A．He always thinks it very boring.B．He always finds it interesting.C．He found it boring at first but changed his view.D．He found it interesting but changed his view later.正确答案：C听力原文：M: Good afternoon. Peony Plaza. Can I help you?W: Lucy Richardson, International Consultants Ltd. I’m phoning to enquire if you could caterfor a dinner party we’re planning to hold on 2nd of February.M: In about a month’s time. Yes, I think we can manage that. How many was it for?W: There will be about twenty all told.M: At what time had you planned to meet?W: Well, I think 7:30 pm would suit us fine and we had thought of your Peony Suite. There’s a rather attractive picture in your brochure.M: Yes, the Peony Suite will be free then.W: That sounds fine. We can now discuss some further details. Menu first.M: We offer two menus for your dinner party. One is more or less Chinese and the other Japanese.W: Both sound great, but we will take the second one.M: Very good, ma’am. Now the table arrangements, do you want one large table?W: No, we thought small individual tables for four would be suitable.M: This arrangement would be more intimate.W: Right. By the way, we shall need brandy with the coffee.M: That can be easily arranged. But drinks are not included in the prices.W: Okay.5．Which of the following about the dinner party is NOT true?A．It is scheduled for February 2nd.B．The hotel has about a month to prepare for it.C．Chinese food will be served.D．It will probably start at 7:30 pm.正确答案：C6．How did the woman get to know the Peony Suite?A．She was a regular customer and knew it well.B．She learned about it from a TV commercial.C．The receptionist recommended it to her.D．She read about it from a brochure.正确答案：D7．What did they finally agree upon table arrangement?A．A big table for all.B．Intimately arranged small tables.C．4 small tables for all.D．Small tables for 6.正确答案：B听力原文：W: Next! Good morning, can I help you?M: This place is a madhouse! Everybody is pushing and shoving!W: Yes, I know. We are shorthanded and we are very crowded today. Now, what can I do for you?M: I want a ticket to New York.W: Okay. One way or round trip?M: One-way, of course. I don’t want to hang around here any longer. I was here in L. A. last year and I hated it. I come here on business every year and I hate it.W: That’ll be $ 478. How would you like to pay?M: Cash, of course. I don’t believe in plastic money or credit cards.W: Aisle or window seat?M:Window seat.W: Smoking or nonsmoking?M: Nonsmoking, of course! Do I look like a smoker to you? Are these smoker’s eyes? Oh, by the way, I’m supposed to get a special meal. Doctor’s orders I can’t eat meat.W: I’m sorry. I’m not able to do that. We need twenty-four hours’ notice for special meals.M: What! You can’t give me my special meal?W: I’m sorry. I would like to, but I simply cannot.M: Well, I don’t give up so easily. Where’s your supervisor? Where is he?W: She!8．What does the conversation say about the passenger’s ticket?A．It’s a one-way ticket to New York.B．It’s for an aisle seat in the nonsmoking section.C．It costs the man $ 438.D．It’s a two-way ticket to L.正确答案：A9．Which of the following words best describes the passenger?A．Pleasant.B．Nasty.C．Agreeable.D．Forgiving.正确答案：B10．In order to get a special meal, what does the man have to do?A．Pay extra for the meal.B．Notify the airline in advance.C．Give the airline a few hours’ notice.D．Get a special order from his doctor.正确答案：B11．What will the man do next?A．Complain to the customer service center.B．Get aboard without a special meal.C．Talk to the clerk’s supervisor.D．Leave the city for good.正确答案：CSECTION B PASSAGESDirections: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.听力原文：The limits of a person’s intelligence are fixed at birth, but whether or not he reaches those limits will depend on his environment. It is easy to show that intelligence is, to some extent, something we are born with. The closer theblood relationship between two people, the closer they are likely to be in intelligence. Thus if we take two unrelated people at random from the population, it is likely that their degree of intelligence will be completely different. If on the other hand, we take two identical twins, they will very likely be as intelligent as each other. Relations like brothers and sisters, parents and children, usually have similar intelligence, and this clearly suggests that intelligence depend on birth. Imagine now that we take two identical twins and put them in different environments. We might send one, for example, to a university and the other to a factory where the work is boring and fixed. We would soon find differences in intelligence developing, and this indicates that environments as well as birth plays a part. This conclusion is also suggested by the fact that people who live in close contact with each other, but who are not related at all, are likely to have similar degrees of intelligence.12．In the development of one’s intelligence, environment plays ______.A．a less important roleB．an equally important roleC．an insignificant roleD．the least significant role正确答案：B13．Which people are likely to be closest in intelligence?A．Husband and wife.B．Two unrelated people.C．Uncle and nephew.D．Two identical twins.正确答案：D14．We can infer that ______ environments help develop a person’s intelligence.A．boringB．rich and variedC．fixedD．identical正确答案：D听力原文：There are many expressions about “apple”. For instance, the expression “apple of discord” describes the condition of wild disorder. It comes from ancient mythology. The myth says that all the gods and goddesses were sitting around a table to celebrate the marriage of Thetis and Peleus. One of the gods--Discord was a troublemaker. He threw a golden apple on the table to be given as a prize to the most beautiful goddess. It was not an easy decision to make. How could they choose among Juno, Minerva and Venus? Paris was given the task of deciding. He decided to give the golden apple to Venus. Juno and Minerva were very angry and threatened him.Thus, the myth says, began the long Trojan War. People believe many things about the apple. One belief is that it has great powers of keeping people healthy. A very common expression is “an apple a day keeps the doctor away”. Another belief is based on fact. The expression is “one rotten apple spoils the barrel”. When an apple begins to go bad, it ruins all the other apples a round it in the container. The expression has come to mean that one had person in a group can cause everyone to act bad.15．Which of the following statements about “apple of discord” is NOT true?A．It comes from ancient mythology.B．It is used to describe the condition of perfect order.C．The apple concerned was a golden one.D．The apple should be given to the most beautiful goddess.正确答案：B16．Paris decided to give the golden apple to ______.A．DiscordB．JunoC．MinervaD．Venus正确答案：D17．“One rotten apple spoils the barrel” means ______.A．rotten apples can bring disorder to people’s healthB．it is hard to choose bad persons from good onesC．one bad person in a group can influence othersD．Rotten apples should be quickly thrown away正确答案：C听力原文：Rembrandt, one of the greatest artists of all time, was born in Leyden in the Netherlands. Many artists traveled to faraway lands. Rembrandt always stayed within 50 miles of his home, although he lived to be 63. Much of his life was spent in Amsterdam, then the richest town in Europe. In some of Rembrandt’s paintings we see the rich clothes and jewels worn by people of that time in Amsterdam. During the first ten years of his career he was a famous and fashionable painter. Then something happened, which ruined him. He became so poor that he had to sell all his furniture and even his rich velvet clothes. To make matters worse, his wealthy wife died, and her parents took the money she had left to him. The following incident ruined the sale of his paintings: the Amsterdam Civic Guard had paid him to paint a picture of them. Since he liked light and shadow, he painted the men as they were leaving the armory at noon to go on duty. The men stillinside were in such deep shadow that their faces could not be recognized. These men were very angry. The men in the sunlight of course showed well. But their satisfaction did not make up for the anger of others. The picture is one of Rembrandt’s best. It is called “The Night Watch”, although it was painted at noon.18．What sort of painter was Rembrandt at the beginning of his career?A．A poor, starving artist.B．A modern, radical artist.C．A famous, fashionable artist.D．A royal painter.正确答案：C19．How did Rembrandt become poor?A．His wife took all his money.B．He spent much money on rich clothes.C．He painted a picture that ruined the sale of his paintings.D．His clients started to pay him less.正确答案：C20．Some men of the Amsterdam Civic Guard disliked Rembrandt’s painting because______.A．they were shadowed and unrecognized in the paintingB．they were painted with unflattering featuresC．the painting was too expensiveD．the painting was not well done正确答案：A21．What conclusion can we draw about Rembrandt?A．He traveled widely like other artists.B．He lived in his hometown for much of his life.C．The death of his wife ruined him.D．He liked shadow more than light.正确答案：B听力原文：Washington--A sightseeing plane crashed on Wednesday evening in Tsku Inley, Alaska, killing at least three people, authorities said. Reports from Juneau, Alaska, said four other people were missing from the fatal crash of the single-engine float-plane-a plane equipped with pontoons or floats for landing on water. The plane, with 10 passengers aboard, crashed and sank into sea, the coast guard said.22．What kind of a plane was it that crashed?A．A war plane.B．A freight plane.C．An ordinary plane.D．A float plane.正确答案：D23．What was the plane equipped with?A．Life boats.B．Ropes.C．Pontoons or floats.D．Wooden boards.正确答案：C听力原文：Sudan’s government has promised UN Secretary General Kofi Annan that it will immediately start to disarm Arab militias accused of committing atrocities against blacks in the western region of Darfur. In a joint statement signed by the government and the United Nations, Sudan also pledged to send troops to the region to protect civilians. The statement was released as Mr. Annan was leaving Sudan after a three-day visit. Mr. Annan is now in Ethiopia where he is trying to promote peace with Eritrea and attend an African Union summit on Tuesday. The summit is expected to focus on economic and security issues affecting Africa.24．What were the Arab militias accused of?A．Carrying out attacks against civilians.B．Acting cruelly against the blacks.C．Disarming the blacks.D．Acting against the government.正确答案：B25．What did the Sudanese government promise to do?A．To reinforce law and order.B．To protect the blacks.C．To take the weapons away from the Arab militias.D．To withdraw government troops.正确答案：C26．Which is NOT Mr. Annan’s mission in Africa?A．To send troops to Darfur.B．To seek peace with Eritrea.C．To establish order in Sudan.D．To attend an African summit meeting.正确答案：APART III CLOZE (15 MIN)Directions: There are 20 blanks in the following passage. Decide which of the choices given below would best complete the passage if inserted in the corresponding blanks.Man is the only animal that laughs. Why is this true? What makes us respond as we【C1】______ to pleasurable experiences? What is the history of this “happy convulsion” as someone once【C2】______ it. and just what is its function? We are not short【C3】______ theories to explain the mystery, for centuries, biologists, psychologists, and medical men have【C4】______ a definitive explanation of laughter. One writer theoried that its function is to intimidate others or to gain stature【C5】______ them by humiliating them. Another took the opposite view that we laugh in order not to cry. A psychologist offered the explanation that laughter functions as a remedy【C6】______ painful experiences, and that it serves to defend a person【C7】______ what the psychologist termed “the many minor pains【C8】______ which man is exposed”, that the seventeenth century, a writer set【C9】______ the theory that we laugh when we compare ourselves with others and’find ourselves superior; in effect, we laugh at the infirmities of others. 【C10】______ every theory has been concerned with either the structure or the function of laughter,【C11】______ relatively few have been devoted【C12】______ the question. of its origin. I propose to offer a theory which, so far as I am 【C13】______ , has not previously been set forth: that only those animals capable of speech are capable of laughter, and that therefore man, being the only animal that【C14】______ , is the only animal that laughs. Those of us who have observed Chimpanzees closely feel quite confident that the chimpanzee occasionally【C15】______ behavior that looks very much like a primitive precursor of human laughter. This behavior, however, has been observed only in a human【C16】______ ; whether or not it occurs under natural【C17】______ is dubious; but the【C18】______ fact that under any condition an ape is capable of such behavior is【C19】______ more than passing【C20】______ for does it not indicate that early man had the rudiments of laughter?27．【C1】A．areB．didC．doD．would正确答案：C解析：此题考查助动词用法。
口腔内科学(基础知识)模拟试卷19(题后含答案及解析)
口腔内科学（基础知识）模拟试卷19(题后含答案及解析) 题型有：1. A1型题 2. B1型题1．神经嵴可演化为下列细胞，除外A．成釉细胞B．成牙本质细胞C．成牙骨质细胞D．牙髓细胞E．牙周膜成纤维细胞正确答案：A2．牙体邻面凸度的生理意义不包括A．按摩牙龈B．分散力C．防止食物嵌塞D．稳定牙列E．稳固牙齿正确答案：A3．正中关系滑向正中的长正中距离约为A．0．2mmB．0．5mmC．0．8mmD．1．2mmE．1．5mm正确答案：B4．不属于上颌骨的是A．额突B．翼突C．颧突D．腭突E．牙槽突正确答案：B5．“根管侧支”描述错误的是A．从根管垂直分出至牙表面的分支B．多见于根中1／3C．根颈1／3多见D．贯穿牙本质与牙骨质E．通向牙周膜的孔称侧孔正确答案：C6．分布于54|45的神经是A．上牙槽中神经B．上牙槽前神经C．颧神经D．腭中神经E．鼻腭神经正确答案：A解析：上牙槽中神经分布于上颌前磨牙和第一磨牙的近中颊根，牙周膜及其牙槽骨。
7．下述对髓角的描述中错误的是A．髓角是髓室在牙尖内的角状突起B．髓角形状、位置与牙尖的高度相似C．乳牙与年轻恒牙髓角长大，老年人短小D．髓角的位置常位于1／3处E．髓角的高度随年龄增加而变低正确答案：D8．参与形成小口畸形的突起是A．球状突与上颌突B．球状突与球状突C．球状突与侧鼻突D．上颌突与下颌突E．上颌突与侧鼻突正确答案：D9．决定牙齿形态的重要的结构是A．成釉器B．牙囊C．牙乳头D．缩余釉上皮E．上皮根鞘正确答案：C10．下列牙中多出现双根管的牙是A．下颌切牙B．下颌尖牙C．上颌尖牙D．上颌第二前磨牙E．下颌前磨牙正确答案：A11．组织学上，成釉细胞瘤的基本类型为A．滤泡型和棘皮瘤型B．滤泡型和丛状型C．丛状型和棘皮瘤型D．滤泡型和颗粒细胞型E．丛状型和基底细胞型正确答案：B12．高分化鳞状上皮呈局部破坏性推进生长的是A．鳞状细胞癌B．基底细胞癌C．梭形细胞癌D．未分化癌E．疣状癌正确答案：E13．下列关于疣状癌的论述错误的是A．是口腔鳞状细胞癌的一型B．呈外生性生长C．生长缓慢，有局部侵蚀性D．一般不转移E．核分裂多见，易转移正确答案：E14．上颌骨突起不包括A．鼻突B．颧突C．额突D．腭突E．牙槽突正确答案：A15．下颌体外面的解剖标志不包括A．正中联合B．颏结节C．外斜线D．颏孔E．颏棘正确答案：E解析：颏棘位于下颌体的内面，上下两对，称为上颏棘和下颏棘，分别为颏舌肌和颏舌骨肌起点。
新疆和田地区五年级下学期期末数学试卷(19)
新疆和田地区五年级下学期期末数学试卷（19）姓名:________ 班级:________ 成绩:________亲爱的小朋友们，这一段时间的学习，你们收获怎么样呢？今天就让我们来检验一下吧！一、判断题。
(共4题；共8分)1. （2分） (2020六上·焦作期末) 如果甲数的倒数小于乙数的倒数，那么甲数大于乙数．（）2. （2分）判断对错．自然数(0除外)的倒数一定比1小．3. （2分）长方体中，底面积越大，体积也越大。
4. （2分）判断对错．扇形统计图能清楚地反映出各个部分数量与总数量之间的关系．二、选择题。
（把序号填入括号内） (共12题；共24分)5. （2分）小红家本月的电费比上月少了，下面四个数量关系中，符合题意的是（）。
A . 本月电费× =上月电费B . 上月电费× =本月电费C . 上月电费×（1+ ）=本月电费D . 上月电费×（1- ）=本月电费6. （2分）小明用同一块橡皮泥先捏成一个正方体，又捏成一个球，体积（）A . 变大B . 变小C . 可能变大，可能变小7. （2分）左图是由（）个小正方拼搭成的。
A . 3B . 4C . 58. （2分）正方体棱长扩大2倍，体积扩大（）倍。
A . 2倍B . 4倍C . 6倍D . 8倍9. （2分）一个长方体中，如果有四个面的面积相等，其余两个面（）A . 都是长方形B . 都是正方形C . 一个是长方形，一个是正方形D . 不能确定10. （2分） 3个小正方体并排摆在空地上，露在外面的面有（）A . 3个B . 9个C . 11个11. （2分）棱长1分米的正方体玻璃缸，能容纳（）液体。
A . 100mLC . 1mL12. （2分） (2018六上·潘集期中) 一根3米长的绳子两次用完，第一次用去米，第二次用去，两次用去的部分相比，（）A . 第一次用的长B . 第二次用的长C . 两次用的同样长D . 无法确定13. （2分）北京晴莲小学三年级有学生240人，其中外地来京打工子弟占，这恰好是全校学生总数的，北京晴莲小学一共有学生（）A . 1500人B . 1050人C . 1005人D . 5100人14. （2分） (2019六上·龙华) 下面说法中，正确的是（）。
19题数学试卷
一、选择题（每题1分，共5分）1.若a>0,b>0，则下列哪个选项是正确的？A.a+b>aB.ab<aC.a×b>aD.a÷b<a2.已知等差数列{an}的公差为2，且a1=3，则a10=？A.19B.21C.23D.253.若|x2|<3，则x的取值范围是？A.-1<x<5B.-1≤x≤5C.-1<x≤5D.-1≤x<54.已知函数f(x)=2x+3，则f(3)=？A.9B.11C.12D.155.若一个三角形的两边长分别为3和4，则第三边的长度可能是？A.1B.4C.6D.7二、判断题（每题1分，共5分）6.若a>b，则ac>bc。
（）7.等差数列的前n项和公式为Sn=n(a1+an)/2。
（）8.若|x|=3，则x的取值有两个，分别是3和-3。
（）9.已知函数f(x)=x^2，则f(-x)=f(x)。
（）10.在直角三角形中，斜边最长。
（）三、填空题（每题1分，共5分）11.若a>0,b<0，则a+b的符号是______。
12.等差数列{an}的公差为3，且a1=2，则a4=______。
13.若|x1|=2，则x的取值有两个，分别是______和______。
14.已知函数f(x)=3x2，则f(0)=______。
15.在直角三角形中，若一个锐角的度数为30°，则另一个锐角的度数为______。
四、简答题（每题2分，共10分）16.请简述等差数列和等比数列的定义。
17.请简述绝对值的性质。
18.请简述函数的定义。
19.请简述直角三角形的性质。
20.请简述勾股定理。
五、应用题（每题2分，共10分）21.已知等差数列{an}的公差为2，且a1=1，求前10项的和。
22.解不等式|x2|<4。
23.已知函数f(x)=x^22x+1，求f(2)的值。
24.在直角三角形ABC中，若∠C=90°，BC=3，AC=4，求AB的长度。
综合练习试卷19(题后含答案及解析)_10
综合练习试卷19(题后含答案及解析)全部题型 6. 名词解释题7. 简答题18. A1型题24. B1型题名词解释题窦性心律(sinus rhythm)正确答案：涉及知识点：综合1．主动转运(active transport)正确答案：主动转运：指细胞膜通过本身的耗能过程，在细胞膜特殊蛋白协助下，将某种分子或离子逆电一化学梯度所进行的跨膜转运的过程。
涉及知识点：综合简答题2．什么是动作电位的“全或无”现象?正确答案：单一神经纤维动作电位是“全或无”的。
它包括：①动作电位的幅度是“全或无”的，细胞接受有效刺激后，一旦产生动作电位，其幅值就达最大，增大刺激强度动作电位的幅值不再增大。
即动作电位可因刺激过弱而不产生(即是无)，一旦产生幅值即达到最大(即是全)，始终保持它固定的大小和形态；②不衰减传导，动作电位在细胞膜的某一处产生后，可沿着细胞膜进行传导，在其传导过程中，无论传导的距离多远，其幅度和形状均不改变。
涉及知识点：综合A1型题3．在无神经和体液因素影响下，窦房结自动兴奋的频率为( )。
A．90次／minB．80次／minC．75次／minD．100次／minE．150次／min正确答案：D 涉及知识点：综合4．谈论美味佳肴时引起唾液分泌是( )。
A．交感神经系统的活动B．本能行为和情绪反应C．第一信号系统的活动D．第二信号系统的活动E．非特异投射系统的活动正确答案：D 涉及知识点：综合5．心肌细胞有效不应期特别长的生理意义是( )。
A．使心肌不发生强直性收缩B．使心肌“全或无”式收缩C．使心肌收缩更有力D．使心肌产生自动节律性兴奋E．使心肌同步收缩正确答案：A 涉及知识点：综合6．红细胞悬浮稳定性差时，将发生( )。
A．溶血B．血栓形成C．叠连加速D．脆性增加E．凝集原正确答案：C 涉及知识点：综合7．血管升压素的主要生理作用是( )。
A．使血管收缩，升高血压B．促进肾小管对Na+重吸收C．降低肾远端小管和集合管对水的通透性D．增加肾远端小管和集合管对水的通透性E．促进肾的保钠排钾作用正确答案：D 涉及知识点：综合8．以下属于丘脑非特异投射系统的主要细胞群是( )。
5G技术大比武试卷(19)_答案
5G技术大比武试卷（19）总分100分，考试一共90分钟一、单选题（共20题，每题2分，共40分）【第1题】相比于4G，5G NR 中增加了一种RRC 状态，它是（）。
A、RRC-connectedB、RRC-idleC、RRC-inactiveD、RRC-hibernated【答案】C【第2题】5G每平方公里至少支持多少台设备A、1000B、1万C、10万D、100万【答案】D【第3题】3.5Ghz频率的波长是多少？A、2mmB、8.5cmC、17cmD、35cm【答案】B【第4题】5G是由ITU定义的第五代移动通信标准，它的正式名字是什么A、IMT-2000B、IMT-2005C、IMT-2010D、IMT-2020【答案】D【第5题】关于NR物理层处理，以下说法错误的是哪项？A、最大的层数是8，对于2个码字B、上行也可以支持多层数据，最大层为4C、天线端口数必须等于层数D、天线端口数可以大于层数【答案】C【第6题】5G AN 和AMF 之间最上层协议是：（）A、A.GTP-UB、B.GTP-CC、C. NG-AP.D、D.S1AP【答案】C【第7题】Option3x网络架构中，用户面数据的分流点是以下哪一项？A、gNBB、EPCD、以上都可以【答案】A【第8题】5G GUTI是由以下哪个网元分配的临时标识？A、A.AMFB、B.UDMC、C.SMFD、D.PCF【答案】A【第9题】4G/5G MME和AMF之间的互操作接口是？A、N24B、N25C、N26D、N27【答案】C【第10题】vSMF和hSMF之间接口是？A、N8B、N10C、N12D、N16【答案】D【第11题】在CMCC外场5G NSA测试中，NR组网要求使用哪种结构A、Option3B、Option3xC、 Option2D、 Option4【答案】b【第12题】鉴权参量中，AUTN的作用是？A、网络检查终端的合法性B、终端用来检查网络的合法性C、鉴权令牌D、提取鉴权令牌【答案】B【第13题】在波束管理流程中，gNB Tx Beam refinement （p2）可以基于下列哪个信号？A、CSI-RSB、SRSC、PTRSD、PRACH【答案】A【第14题】SSB的频宽是多少个子载波？A、10B、20C、120【答案】D【第15题】gNB-CU和Gnb-DU之间的接口是A、NGB、XnC、F1D、E1【答案】C【第16题】下面哪个不是NR支持的PRG（）A、2B、4C、8D、Wideband【答案】C【第17题】在5G异频重选流程中，终端通过哪个消息获取异频的重选优先级？A、SIB3B、SIB2C、SIB4D、SIB5【答案】C【第18题】NR中物理层小区ID共有（）个A、504B、168C、1008D、336【答案】C【第19题】SA组网模式下，控制面切换时延定义是（）A、从Measurement report后的第一个携带HO标识的RRC Connection ReconfigurationB、从Measurement report后的第一个携带HO标识的RRC Connection ReconfigurationC、从UE发送Measurement report到UE发送MSG2的时延D、从UE发送Measurement report到UE发送MSG1的时延【答案】A【第20题】对于整体覆盖优化流程，说法错误的是？A、连片簇优化前首先确定站点完好率以及优化目标B、对于弱覆盖因物业等原因天馈无法调整，可通过后台权值优化加强覆盖C、因NSA锚点只用来进行控制面承载，只要不出现异常事件，及时锚点的乒乓切换不影响5G用户感知D、NSA组网下，除关注NR的覆盖水平，同时需保证锚点的良好覆盖【答案】C二、多选题（共20题，每题2分，共40分）【第1题】5G毫米波频谱A、37-42.5GHzB、24.75-27.5GHzC、3300-3600MHzD、4800-5000MHz【答案】AB【第2题】5G系统中，下行信号包括（）A、PT-RSB、DMRSC、PSS/SSSD、CSI-RS【答案】ABCD【第3题】5G D2D通信优势是（）。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
一、填空题(每空0、5分，共10分)1、DNA复制过程中催化引物合成的酶是_________________，此酶实际上是一种________________酶。
2、酶所催化的反应是_______________被酶作用的物质叫做_________________。
3、尿素是在_________脏合成，通过 ________________ 循环完成的。
4、葡萄糖生成6—磷酸葡萄糖的过程由________________酶催化，在肝脏则由_________________酶催化。
5、____________是维持人体正常代谢和生理功能所必需的 __________________。
6、3—磷酸甘油醛经_____________________酶催化能生成NADH＋H ，无氧时此对氢使_________________还原为乳酸。
7、白化病是由于先天缺乏__________________酶导致的，而蚕豆病是缺乏____________________酶而致。
8、蛋白质在酸性条件下带___________________电荷，能与 _________________结合而产生沉淀。
9、酶的抑制作用分为两大类，分别是___________________和________________。
10、_________的氨基酸称为标准氨基酸，与其它氨基酸的区________________。
二、是非判断题∶(每题1分，共10分)1、DNA和RNA 都是由许多单核苷酸通过磷酸二酯键组成。
( )2、DNA变性后的紫外吸收值增加。
( )3、温度升高或降低都能使酶蛋白变性，使酶的活性丧失。
( )4、肝糖原和肌糖原都能由葡萄糖为原料合成，肝糖原能直接分解成血糖。
（）5、细胞内CO2是由碳和氧直接化合生成的。
（）6、糖酵解，有氧氧化，戊糖磷酸途径都是糖的分解代谢途径。
（）7、电泳是指带电的颗粒在电场中向电性相同的方向移动的现象。
（）8、酶原激活是指在激活剂的作用下使酶的活性增加。
（）9、 VLDL的主要成分是甘油三酯，其功能主要是转运外源性脂肪。
（）10、糖原的合成、分解及脂肪酸的合成都是在细胞内的胞液中进行反应的。
（）三、名词解释∶(每个2分，共20分)1、痛风症2、生物转化3、DNA复性4、蛋白质变性5、乳酸循环6、糖异生7、转录8、血浆脂蛋白9、黄疸 10、密码子四、选择题(每题1分，共40分)单选题选择一个正确答案1、蛋白质分子中稳定α—螺旋的键主要是A、肽键B、氢键C、碱基堆积力D、离子键E、疏水键2、与糖酵解无关的酶是A、已糖激酶B、乳酸脱氢酶C、磷酸化酶D、醛缩酶E、丙酮酸羧化酶3、一分子葡萄糖通过有氧氧化共有几次底物水平磷酸化反应。
A、6次B、2次C、3次D、4次E、5次4、脂肪大量动员时肝内生成的乙酰CoA，主要用来合成A、酮体B、胆固醇C、葡萄糖D、氨基酸E、脂肪酸5、蛋白质中平均含氮量为A、9％B、10％C、12％D、16％E、20％6、人类嘌呤核苷酸分解代谢的最终产物是A、尿素B、乳酸C、酮体D、黄嘌呤E、尿酸7、转氨酶的辅酶是A、VitB1B、VitB2C、VitPPD、VitB6E、VitC8、CM合成的组织是A、肝脏B、血浆C、小肠D、肌肉E、肾脏9、氮总平衡常见于哪种情况A、孕妇B、儿童生长发育期C、长期饥饿D、正常成人E、恶性肿瘤晚期患者10、蛋白质中的主要化学键是A、肽键B、氢键C、二硫键D、离子键E、疏水键11、一分子丙酮酸经三羧酸循环彻底氧化分解成CO2和H2O后能生成的ATP数为A、8分子B、9分子C、12分子D、15分子E、10分子12、脂肪酸β-氧化不能生成A、 NADH+HB、乙酰COAC、丙二酰COAD、 FADH2E、β-羟脂酰COA13、含胆固醇最多的是A、CMB、VLDLC、LDLD、HDLE、游离脂肪酸14、脑组织中氨的主要去路是A、合成谷氨酰胺B、合成尿素C、生成铵盐D、合成糖E、直接由尿排出15、酶原激活的生理意义为A、加速代谢B、提高酶的活性C、使酶抑制D、保护自身组织细胞E、分解组织细胞16、阻塞性黄疸不正确的是A、血中结合胆红素大量增加B、胆红素排泄障碍C、范登白试验直接反应阳性D、粪便颜色变深E、尿胆素原减少或无17、血浆中使胆固醇酯化的酶是A、HMGCoA合成酶B、HMGCoA还原酶C、卵磷脂胆固醇脂酰基转移酶D、脂酰CoA胆固醇脂酰基转移酶E、HMGCoA裂解酶18、糖原合成过程中的关键酶是A、已糖激酶B、磷酸化酶C、糖原合成酶D、变位酶E、异构酶19、含稀有碱基较多的是A、mRNAB、DNAC、cAMPD、rRNAE、tRNA20、竞争性抑制作用不正确的是A、底物与抑制剂结构相似B、底物与抑制剂同时与酶活性中心结合C、抑制剂与酶以非共价健结合D、抑制作用强弱只取决于抑制剂浓度大小E、可用增加底物浓度解除抑制作用多选题∶(选择二个或二个以上正确答案)21、被有机磷抑制的主要酶和抑制类型是A、不可逆性抑制作用B、竞争性抑制作用C、胆碱酯酶D、二氢叶酸合成酶E、细胞色素氧化酶22、脂溶性Vit吸收障碍可引起的疾病有A、恶性贫血B、佝偻病C、坏血病D、癞皮病E、夜盲症23、与转氨基作用有关的是A、WitB6B、TPPC、转氨酶D、FADE、CoQ24、含有泛酸的是A、NADB、FADC、辅酶AD、转氨酶E、酰基载体蛋白25、脂肪的主要生理功能是A、构成生物膜的成分B、固定和保护内脏C、储存和提供能量D、催化作用E、遗传作用26、影响一碳单位代谢的有A、生物素B、叶酸C、B12 D、B6E、泛酸27、嘧啶碱分解代谢的终产物是A、β-羟丁酸B、β-丙氨酸C、β-氨基异丁酸D、β-氨基丁酸E、β-甲基丁酸28、DNA与RNA不全含有的碱基是A、UB、CC、GD、TE、A29、依据中心法则影响蛋白质分子组成的有A、DNAB、MrnaC、tRNAD、rRNAE、cAMP30、碱性氨基酸包括A、精氨酸B、组氨酸C、色氨酸D、赖氨酸E、谷氨酸31、黄素酶的辅基是A、FMNB、铁硫蛋白C、NADD、FADE、细胞色素32、与糖酵解有关的是A、无氧时供能B、产生能量少C、脱羧酶D、丙酮酸激酶E、丙酮酸脱氢酶系33、DNA复制时需A、RNA聚合酶B、引物酶C、连接酶D、DNA聚合酶E、核心酶34、血脂的成份有A、甘油三酯B、胆汁酸C、磷脂D、胆固醇E、胆红素35、与脂肪酸氧化有关的是A、ATPB、NADC、脂肪酶D、脂酰CoA合成酶E、FAD36、与戊糖磷酸途径有关的是A、产生核糖B、胞液中C、无氧时供能D、产生NADPH＋HE、葡萄糖—6—磷酸酶37、维生素D进行羟化的组织有A、肝脏B、心脏C、小肠D、肾脏E、肌肉38、糖原合成时需A、已糖激酶B、UTPC、糖原合成酶D、GTPE、磷酸化酶39、与肌肉活动最密切的能源物质有A、 ATPB、丙酮酸C、 GTPD、肌酸E、磷酸肌酸40、血糖可转变成A、核糖B、脂肪C、胆红素D、糖原E、CO2和H2O五、问答题(每题5分，共20分)1、 ALT与AST催化的反应及临床意义。
2、糖有氧氧化的过程及生理意义。
3、呼吸链的组成成分及排列顺序。
4、蛋白质沉淀与变性的特点。
湖北中医学院生物化学标准答案7（66）一、填空题：（每空0、5分，共10分）1、引物酶 RNA2、酶促反应底物3、肝鸟氨酸4、己糖激酶葡萄糖激酶5、维生素一类低分子有机化合物6、3-磷酸甘油醛脱氢酶丙酮酸7、酪氨酸酶 6－磷酸葡萄糖脱氢酶8、正生物碱9、可逆性抑制不可逆性抑制10、用于合成蛋白质的20种含遗传密码二、是非判断题∶（每题1分，共10分）1、√2、√3、×4、√5、×6、√7、×8、×9、× 10、√三、名词解释∶（每个2分，共20分）1、痛风症：痛风是由于核酸大量摄入和大量分解，或尿酸排泄障碍尿酸盐晶体沉积在关节、软组织等处导致痛风。
2、生物转化：肝脏将外源性或者内源性的非营养物质进行转化，改变其极性，使其易于随胆汁或者尿排出。
3、DNA复性：变性的DNA在适当的条件下，两条互补链重新配对，恢复天然的双螺旋构象的现象。
4、蛋白质变性：某些理化因素使蛋白质分子的构象发生改变，导致其理化性质的改变及生物学活性丧失。
：5、乳酸循环：肌肉组织中生成的乳酸通过血液运输到肝脏内异生成葡萄糖。
葡萄糖进入血液后又可被肌肉组织摄取，此循环成为乳酸循环。
6、糖异生：指将非糖物质(乳酸、甘油、生糖氨基酸等)转变成葡萄糖或糖原的过程。
7、转录：转录是在DNA指导的RNA聚合酶催化下进行的，以DNA的一条链为模板，按照碱基配对原则，合成RNA的过程称为转录。
8、血浆脂蛋白：脂类与血浆中的蛋白质结合，以脂蛋白的形式而运输。
血浆脂蛋白主要由载脂蛋白、甘油三酯、磷脂、胆固醇及其酯组成。
9、黄疸：由于某些原因胆红素代谢发生障碍，使血中胆红素含量过高，胆红素易与弹性蛋白结合，使巩膜、皮肤和粘膜黄染的现象称为黄疸。
10、指mRNA分子上每相邻的三个碱基组成一个三联体，为一个密码子，代表一个氨基酸信息。
四、选择题：（每题1分，共40分）单选题1、B2、E3、A4、A5、D6、E7、D8、C9、D 10、A 11、D 12、C 13、C 14、A 15、D 16、D 17、C 18、C 19、E 20、D多选题21、AC 22、BE 23、AC 24、CE 25、ABC 26、BC27、BC 28、AD 29、AB 30、ABD 31、AD 32、ABD33、BCD 34、ACD 35、ABDE 36、ABD 37、AD 38、ABC39、AE 40、ABDE五、问答题：（每题5分，共20分）1、ALT与AST催化的反应及临床意义。
ALT与AST催化的反应为氨基转移反应，ALT为丙氨酸氨基转移酶，AST为天冬氨酸转移酶（1分）。
正常情况下，氨基转移酶主要存在于组织细胞中内，只有当组织受损，细胞破裂时，才会大量释放入血，使血中氨基转移酶活性明显增高，ALT在肝脏活性最高。
如急性肝炎患者血清ALT活性显著增高（2分）。
AST在心肌中活性高，如心急梗塞患者血清中AST活性明显上升。
故临床可以作为某些疾病的诊断和判断预后的指标（2分）。
2、糖有氧氧化的过程及生理意义。
糖的有氧氧化大致分为三个阶段。
①葡萄糖循酵解途径分解成丙酮酸；②丙酮酸进入线粒体内，氧化脱羧生成乙酰CoA；③三羧酸循环及氧化磷酸化。
⑴酵解途径中有三步不可逆反应：己糖激酶（肝葡萄糖激酶）、磷酸果糖激酶和丙酮酸激酶催化的反应。
（1分）⑵丙酮酸的氧化脱羧，总反应式为：丙酮酸 + NAD+ + HSCoA →乙酰CoA + NADH + H+ + CO2此反应由丙酮酸脱氢酶系催化 (1分)⑶三羧酸循环：乙酰辅酶A与草酰乙酸缩合生成柠檬酸，柠檬酸经顺乌头酸转变成异柠檬酸，异柠檬酸β-氧化、脱羧生成α-酮戊二酸，α-酮戊二酸氧化、脱羧生成琥珀酰辅酶A，琥珀酰辅酶A由琥珀酸硫激酶催化转变为琥珀酸，琥珀酸脱氢转变为延胡索酸，延胡索酸加水生成苹果酸，苹果酸脱氢生成草酰乙酸。