西安交大大一期末口语考试情景对话试题

A级期末考试情景对话题目

Oral English Final Test (First semester in 2015-2016)

Situation 1: You want to help out a college dropout from the poverty-stricken area. Your partner has been thinking the same. You suggest

organizing an event to raise money for the student. Talk about your

plan. Make sure your conversation takes at least 2 minutes. Situation 2: At high school reunion, you and one of your classmates are describing the first semester’s college life to each other and talking

about your study plans at university in the following semesters.

Each of you makes suggestions for the other. Make sure your

conversation takes at least 2 minutes.

Situation 3: You failed to complete your English assignment. Now, you are telling your partner what happened and how you felt. Your partner

shows sympathy and encouragement for you. Make sure your

conversation takes at least 2 minutes.

Situation 4: Your roommate is missing his/her parents very much. He/She is telling you how he/she feels. You sympathize with your roommate

and try to comfort him /her. Make sure your conversation takes at

least 2 minutes.

Situation 5: Your roommate had his/her bicycle stolen last night. He/She is expressing his/her anger to you and you are suggesting that he/she

should report it to the police. He/She follows your advice and you

try your best to comfort him/her. Make sure your conversation

takes at least 2 minutes.

Situation 6: You find out that your computer or mobile phone has gone. You express your upset to your classmate. Your classmate is trying to

help you recall where you left it. He/She accompanies you to look

for it and in the end you find it. Make sure your conversation takes

at least 2 minutes.

Situation 7: You are sharing a piece of news with your roommate. Tell him/her

the news and respond appropriately to his/her comments on your

introduction of the news. Then talk about how both of you usually

get news. Make sure your conversation takes at least 2 minutes. Situation 8: You predict the newspaper is going to disappear and your partner doesn’t think so. Try to give your supporting ideas. Make sure your

conversation takes at least 2 minutes.

Situation 9: You saw a movie about a war. Your partner asks you to tell him/her what caused the war and how the war ended. Then you

discuss the effect of the war. Make sure your conversation takes at

least 2 minutes.

Situation 10: You and your partner are talking about one leader during a war. As you want to know more about the leader, your partner gives an

important piece of information about him. Then you both talk

about the sequence of events during the war and give a rough

estimate about the size of the armies. Make sure your conversation

takes at least 2 minutes.

Situation 11: Share with your partner one particular sport you like or enjoy watching. You two can tell or ask each other about the rules, the

reasons you like it, your favorite players or an unforgettable

game…. Make sure your conversation takes at least 2 minutes. Situation 12: You and your partner are discussing the payments to great

sportsmen or sportswomen. Share with each other whether they

should be paid as much as film stars? Pay attention to how to

express certainty and how to invite others to speak. Make sure your

conversation takes at least 2 minutes.

Situation 13: Share with your partner two English expressions with animals, (such as “let the cat out of the bag”). Tell him/her the meaning and

the reasons why this particular animal is used. Use examples or

situations to illustrate how the expressions are used. Make sure your

conversation takes at least 2 minutes.

ituation 14: Please discuss with your partners how animals should be treated. Should it be based on how intelligent they are? Give

detailed examples to support your ideas. Make sure your

conversation takes at least 2 minutes.

Situation 15: Tell or ask your partner what hobby or hobbies you want to develop in the future and why. Make sure your conversation takes

at least 2 minutes.

Situation 16: Share with your partner your volunteer experience. Describe what specific job(s) you did and how you benefited from it. Make sure

your conversation takes at least 2 minutes.

Situation17: Share with (or ask) your partner the education your parents or relatives received and jobs are doing, esp. what they do on daily

basis. How are their education and jobs related? What have they

done (or what training they received) to become more professional?

Make sure your conversation takes at least 2 minutes.

Situation 18: Imagine you two meet 15 years after graduation. Share with (or ask) each other the jobs you are doing and what your future career

plan is. Also talk about how your education contributes to your

career. Make sure your conversation takes at least 2 minutes. Situation 19: Technological innovations have transformed our life. Tell each other which one(s) you think are the most important ones. Give

your reasons and examples. Make sure your conversation takes at

least 2 minutes.

Situation 20: How do you see time travelling from the perspective of fiction or science? Ask each other and answer. You may use examples. Make

sure your conversation takes at least 2 minutes.

Situation 21: Share with each other how you perceive yourself. Use 3 to 5 words to describe your personality. At the same time ask his or her

impression on you. How do the two differ or coincide? Make sure

your conversation takes at least 2 minutes.

ituation 22: Share with each other the unforgettable conversation you had with your father or mother or sb who influenced you a lot. When?

Where? For what reason and what was the result? Make sure your

conversation takes at least 2 minutes.

大一英语期末考试试题精选

大一英语期末考试试题精选 又到一个学期的期末了，大家复习好大学英语了吗?为大家精心挑选了一份大学英语第一学期期末试卷，供大家复习使用，希望能够帮助到大家! 大学一年级英语试卷 Part II Reading Comprehension (30 %) Directions: There are four passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on the Answer Sheetwith a single line through the center. Passage One Science is not a set of unquestionable results but a way of understanding the world around us. Its real work is slow. The scientific method , as many of us learned in school, is a gradual process that begins with a purpose or problem or question to be answered. It includes a list of materials, a procedure to follow, a set of observations to make and, finally, conclusions to reach. In medicine, when a new drug is proposed that might cure or control a disease, it is first tested on a large random group of people, and their reactions are then compared with those of another random group not given the drug. All reactions in both groups are carefully recorded and compared, and the drug is evaluated. All of this takes time and patience. It’s the result of course, that makes the best news—not the years of quiet work that characterize the bulk of scientific inquiry. After an experiment is concluded or an observation is made, the result continues to be examined critically. When it is submitted for publication, it goes to a group of the scientist’s colleagues, w ho review the work. Einstein was right when he said: “No amount of experimentation can ever prove me right, a single experiment can at any time prove me wrong.”

统计西安交大期末考试试题(含答案)

西安交大统计学考试试卷 一、单项选择题（每小题2 分，共20 分） 1.在企业统计中，下列统计标志中属于数量标志的是（C） A、文化程度 B、职业 C、月工资 D、行业 2.下列属于相对数的综合指标有（B ） A、国民收入 B、人均国民收入 C、国内生产净值 D、设备台数 3.有三个企业的年利润额分别是5000 万元、8000 万元和3900 万元，则这句话中有（B）个变量？ A、0 个 B、两个 C、1 个 D、3 个 4.下列变量中属于连续型变量的是（A ） A、身高 B、产品件数 C、企业人数 D、产品品种 5.下列各项中，属于时点指标的有（A ） A、库存额 B、总收入 C、平均收入 D、人均收入 6.典型调查是（B ）确定调查单位的 A、随机 B、主观 C、随意 D 盲目 7.总体标准差未知时总体均值的假设检验要用到（A ）： A、Z 统计量 B、t 统计量 C、统计量 D、X 统计量 8.把样本总体中全部单位数的集合称为（A ） A、样本 B、小总体 C、样本容量 D、总体容量 9.概率的取值范围是p（D ） A、大于1 B、大于－1 C、小于1 D、在0 与1 之间 10.算术平均数的离差之和等于（A ） A、零 B、1 C、－1 D、2 二、多项选择题（每小题2 分，共10 分。每题全部答对才给分，否则不计分） 1.数据的计量尺度包括（ABCD ）： A、定类尺度 B、定序尺度 C、定距尺度 D、定比尺度 E、测量尺度 2.下列属于连续型变量的有（BE ）： A、工人人数 B、商品销售额 C、商品库存额 D、商品库存量 E、总产值 3.测量变量离中趋势的指标有（ABE ） A、极差 B、平均差 C、几何平均数 D、众数 E、标准差 4.在工业企业的设备调查中（BDE ） A、工业企业是调查对象 B、工业企业的所有设备是调查对象 C、每台设备是 填报单位D、每台设备是调查单位E、每个工业企业是填报单位 5.下列平均数中，容易受数列中极端值影响的平均数有（ABC ） A、算术平均数 B、调和平均数 C、几何平均数 D、中位数 E、众数 三、判断题（在正确答案后写“对”，在错误答案后写“错”。每小题1 分，共10 分） 1、“性别”是品质标志。（对）

大一英语上学期期末考试试卷

2010级大学英语第一学期期末考试(A卷) Jan., 2011 Part II Reading Comprehension (30 %) Directions: There are four passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the center. Passage One Science is not a set of unquestionable results but a way of understanding the world around us. Its real work is slow. The scientific method , as many of us learned in school, is a gradual process that begins with a purpose or problem or question to be answered. It includes a list of materials, a procedure to follow, a set of observations to make and, finally, conclusions to reach. In medicine, when a new drug is proposed that might cure or control a disease, it is first tested on a large random group of people, and their reactions are then compared with those of another random group not given the drug. All reactions in both groups are carefully recorded and compared, and the drug is evaluated. All of this takes time and patience. It’s the result of course, that makes the best news—not the years of quiet work that characterize the bulk of scientific inquiry. After an experiment is concluded or an observation is made, the result continues to be examined critically. When it is submitted for publication, it goes to a group of the scientist’s colleagues, who review the work. Einstein was right when he said: “No amount of experimentation can ever prove me right, a single experiment can at any time prove me wrong.” In August 1996, NASA announced the discovery in Antarctica of a meteorite（流星） from Mars that might contain evidence of ancient life on another world. As President Clinton said that day, the possibility that life existed on Mars billions of years ago was potentially one of the great discoveries of our time. After the excitement wore down and initial papers were published, other researchers began looking at samples from the same meteorite. Some concluded that the “evidence of life”was mostly contamination from Antarctic ice or that there was nothing organic at all in the rock. Was this a failure of science, as some news reports trumpeted? No! It was a good example of the scientific method working the way it is supposed to. Scientists spend years on research, announce their findings, and these findings

西安交大《思修》期末考试试题--含答案

2008年1月5 日 B 卷 西安交通大学考试题 成绩 课 程 思想道德修养与法律基础 学 院 考试日期 专业班号 _______________________ 姓 名 学号 （注意：考试时间为120分钟，请将全部答案写在答题纸上，写在试题上无效） 一、单项选择题（每小题1分，共15分） 1、 一个民族赖以生存和发展的精神支柱是 A 、民族荣誉感； B 、民族精神； C 、民族价值； D 、民族道德 2、 世界观是 A 、人们对人生的态度和看法； B 人们对个人对社会和他人意义的看法； C 、人们对生活在其中的世界以及人与世界的关系的总体看法和根本观点； D 人们对于世界目的和意义的根本看法 3、 我国宪法的修改要由全国人大以全体代表的 A 、2/3以上多数通过； B 、1/2以上多数通过； C 、3/4以上多数通过； D 、4/5以上多数通过 4、 社会主义道德建设的核心是 A 、经济建设； B 、集体主义； C 、以人为本； D 、为人民服务 5、 犯罪客体是我国刑法所保护的而为犯罪行为所危害的 A 、社会关系； B 、法律关系； C 、物质关系； D 、思想关系 6、 成为德智体美全面发展的人才是大学生的成才目标，人才素质的灵魂是 A 、德； B 、智； C 、体； D 、美 7、 道德最突出最重要的社会功能是 A 、调节功能； B 、教育功能； C 、认识功能； D 、导向功能 期中 期末「“

&民法调整的财产关系和人身关系限于 A、平等主体之间； B 、具有行政隶属关系的主体之间； C、所有主体之间； D 、纵向关系的主体之间 9、因寄存财物被丢失引起纠纷的民事诉讼时效为 A 3年；B、4 年；C、1 年；D、2 年 10、“法无明文规定不为罪，法无明文规定不处罚”体现了刑法的 A、罪责自负原则； B、罪刑相当原则； C、适用法律一律平等原则； D罪刑法定原则 11、民事诉讼的管辖是指各级人民法院之间或同级人民法院之间受理 A、民事纠纷案件的分工和权限； B、第一审民事纠纷案件的分工和权限； C、公诉案件的分工和权限； D 、自诉案件的分工和权限 12、个体的人生活动对自身生存和发展所具有的意义，属于人的 A、自我价值； B、社会价值； C、理性价值； D、潜在价值 13、社会主义民主与法制的根本保证是 A、统一战线； B、人民当家作主； C、民主集中制； D、党的领导 14、婚姻家庭得以形成和发展的前提条件是 A、婚姻属性； B、家庭属性； C、自然属性； D、社会属性 15、马克思主义认为，人的本质并不是单个人所固有的抽象物，在其现实性上，它是一切 A、社会关系的总和； B、自然属性的总和； C、世界观的总和； D价值观的总和 二、多项选择题（每小题1分，共15分） 1、以代理产生的原因为标准，代理可分为 A、委托代理； B、法定代理； C、自行代理； D、指定代理； E、他人代理 2、当代大学生应树立的新的学习理念包括 A、自主学习理念； B、全面学习理念； C、创新学习理念；

大一英语期末期末考试试题内含答案[1]

大学英语预备阶段练习（一） （Unit 1~4） ⅠWord Building Directions: Fill in the blanks with the correct form of the words given in the brackets. 1.Thank you very much for your ____ advice. I followed it and succeeded at last. (value) 2.His business has ____ rapidly since his brother came to help. (development) 3.After a two-day discussion, we finally found a ____ to the difficult problem. (solve) 4.Prices ____ high for quite a while .People began to complain about it. (remaining) 5.I don’t think it ____ to finish all the work today. We can go on with it tomorrow.(necessity) 6.It is obviously not ____ to leave a 3-year-old boy alone at home. (properly) 7.The tourists saw a beautiful ____ when they climbed onto the top of the mountain.(scene) 8.Traveling in the desert is a challenging ____ to most people. ( inexperience) 9.____, I don’t think it possible to finish the task in two days. (person) 10.The government must make sure that the economy is developed in the right ____.(direct) ⅡVocabulary and Structure Directions: Choose the best one from the four choices to complete the sentence. 11.The temperature ____ throughout the day in that part of the country. A. very B. remains C. differs D. varies 12.The game is full of violence and will certainly have a bad ____ on young players. A. meaning B. pain C. loss D. influence 13.The warm-hearted elderly lady downstairs is always ____ to help others. A. real B. ready C. practical D. polite 14.The question is ____ difficult in the exam today. Don’t you think so? A. therefore B. since C. rather D. otherwise 15.She used to live in a lovely ____ building near the sea. A. 3-story B. 3-stories C. 3-classed D. 3-classes 16.There are different ____ of transport in big cities for you to choose when you go out. A. means B. mean C. meanings D. meaning 17.They did not take a rest until the job was ____ finished. A. straightly B. specially C. completely D. fairly 18.The bookstore owner ____ the old magazines with a new ones to attract more readers. A. required B. reviewed C. repeated D. replaced 19.Would you like to buy the book? It is ____ reading. A. worthy B. firm C. further D. worth 20.She wears sunglasses to ____ her eyes from the sunshine in summer. A. prepare B. produce C. protect D. provide 21.We all like her very much for her pleasant ____: kind, gentle and warm-hearted. A. character B. chance C. chairman D. skills 22.All the students enjoyed the wonderful ____ by the professor that afternoon. A. discussion B. lecture C. advice D. solution 23.If you have confidence in yourself first, you will not be _______ by others easily. A.won B. doubled C. defeated. D. delayed 24.The little girl developed a strong _______ on her new friends.

(整理)西安交通大学口腔医学本科期末考试试题

西安交通大学口腔医学本科期末考试试题 课程 系别考试日期年月日 专业班号 姓名学号期中期末 一、A1型题（每题1分，共50分） 1、口腔中的主要致龋菌为 A放线菌菌株 B乳杆菌 C变形链球菌 D以上全不对 E以上都对 2、关于继发龋，以下哪种叙述是正确的 A继发龋是在原来龋坏基础上又发生龋坏 B继发龋是龋病治疗后，由于充填物边缘与牙体组织之间形成缝隙而产生龋病C继发龋的可能原因充填物边缘或窝洞周围牙体组织之间破裂不密合或龋坏病变组织未去除干净，形成菌斑滞留区 D B和C正确 E以上全对 3、引起楔状缺损的主要原因是 A牙颈部结构薄弱 B酸的作用

C牙体材料疲劳 D刷牙 E以上全不对 4、后牙浅龋制洞洞深以达釉牙本质界下---为宜？ A 0.1-0.2mm B 0.2-0.5mm C 0.5-1mm D 1.0-2.0mm E以上都不对 5、牙隐裂最常发生于 A下颌磨牙 B上颌磨牙 C下颌前牙 D上颌前牙 E上颌尖牙 6、目前公认的龋病致病因素包括 A酸、微生物、宿主、即牙齿健康状况 B微生物、饮食、年龄 C微生物、饮食、遗传 D微生物、饮食、宿主即牙齿健康状况 E细菌、蔗糖、时间 7、深龋充填术后出现自发疼痛应

A对症处理 B调牙合 C照牙髓炎的治疗原则处理 D取出原充填物，垫底后重新充填 E服消炎药或止痛药 8、银汞合金充填窝洞时其固位形主要依靠 A其与牙体组织间的粘结性 B侧壁固位 C倒凹固位 D密合的摩擦力和洞口小于洞底的机械力 E以上全不对 9、下列叙述中，哪一项不正确 AⅡ类洞为发生于后牙邻面的龋损所制备的洞形 BⅢ类洞为发生于前牙邻面未损伤切角的龋损所制备的洞形 CⅣ类洞为发生于前牙唇面并损伤切角的龋损所制备的洞形 DⅤ类洞为发生于所有牙唇(颊)龈1/3牙面的龋损所制备的洞形EⅠ类洞为发生于所有牙齿的发育窝沟内的龋损所制备的洞形10、洞形制备的一般原则不包括 A尽量去净病变组织 B保存健康组织 C了解患者的健康状况 D失活牙髓，减轻疼痛

西安交大概率论2016-2017期末试题解答

概率论与数理统计试题 2016—2017第一学期（期末）试题解答 一、完成下列各题（每小题4分，共24分） 1. 设随机事件A ，B ，C 相互独立，21)()(==B P A P ,4 1 )(=C P ,分别求出)(C B A P 及)(BC A P -的值。 解：)(1)()(1)()(1)(C P C P B P B P A P A P -=-=-=，， ∵C B A ,,相互独立 所以C B A ,,也相互独立 )()()(),()()(),()()(C P B P C B P C P A P C A P B P A P B A P === )()()()()()()()(C B A P C B P C A P B A P C P B P A P C B A P +---++= 16 15 = ))()(())(()()(C A B A P C B A P BC A P BC A P ===- 16 7)()()()()()()()()()(=-+=-+=C P B P A P C P A P B P A P C B A P C A P B A P 相关知识： ①_)()()()()(1)(AB P B P A P B A P A P A P -+=-= ，（书P11） ②事件的相互独立性：)()()(,B P A P AB P B A =?相互独立 四对事件}B ,A {,}B {A,B},,A {B},{A,中有一对是相互独立的，则另外三对也相互 独立，此结论可推广至n 个事件的情形。（书P20） ③事件的差：B A B A =- ④De Morgan 律：B A AB =

大一期末考试英语试题

01 Passage 1 Hypnotism (催眠术) is very old. Thousands of years ago people started to use it in Egypt. The use of hypnotism has grown very much since that time. Today, doctors and scientists are in almost every country hypnotize people to help them with their problems. What is hypnotism, and how does it work? Many people think that a hypnotist puts people to sleep. Then he makes the hypnotized people do strange things. This is not what a hypnotist does. Hypnotism is really just a way to relax the mind and body. What are some of the uses of hypnotism? We go to a hypnotist because w e have a problem. The problem makes us unhappy. The hypnotist asks us to think hard about something and relax. When we are relaxed, t he hypnotist gives us some ideas to help us with our problems. Hypnotism can help people to remember things. The police sometimes ask hypnotists to help them. For example, a man sees an accident. He forgets the license number of the car he sees. If he is hypnotized he may remember it. The police can then find the car and catch the driver. People who are hypnotized can also make mistakes or say something that isn't true. People remember what they think they saw. That may not be what really happened. The police don't hypnotize people who do something wrong. Why not? People who are hypnotized may say something that isn't true. A person who has done something bad has a good reason to say something that isn't true. 1. Hypnotist helps people by ____. [A] putting them to sleep [B] helping them to get relaxed [C] offering his ideas about their problems [D] making them forget their problems 2. When hypnotized, some people may say something that is not true, because ____. [A] they do not remember what has happened [B] they remember what they think has happened [C] they do not know what has happened [D] they are not interested in what has happened 3. According to the passage, which of the following is TRUE?____ [A] Hypnotism is very different form what it used to be. [B] When a person is hypnotized, his body gets relaxed, while his mind works hard. [C] Hypnotism is much more widely used today than it was thousands of years ago. [D] When hypnotized, a person will do something strange. 4. The passage mainly talks about ____. [A] how hypnotism works [B] the development of hypnotism [C] the use of hypnotism [D] the wonder of hypnotism

西安交通大学管理学期末考试试题1

西安交通大学管理学期末考试试题二 一、选择题（每小题1.5分，共15分） 1（）的目的能使管理人员全面了解整个组织的不同工作内容，得到各种不同的经验，为其今后在更高层次上任职打好基础 A提升B职务轮换C在副职上培训D理论培训 2在管理方格理论中，确定领导行为的两个因素是（） A对人的关心B对生产的关心C正式结构D体谅 3决策是计划工作的（） A基础B重心C核心D目标 4决策树是（）的一种，受到广泛的使用 A博弈论法B效用方法C线性规划法D期望值法 5狭义的决策就是（）方案 A筹备B拟定C选择D执行 6组织工作就是为了使组织有效运作而进行的一种（）的设计和维持 A职位结构B人员群体C分工协作D组织框架 7管理层次的划分主要是解决组织的（）问题 A横向结构B纵向结构C横向分工D总想协调 8按（）划分部门是最普遍采用的一种划分方法 A地区B职能C产品D时间 9一般的，集权或分权的程度，常根据各管理层次拥有的（）来确定 A组织权B决策权C计划权D领导权 10根据激励的公平理论（）能得到激励 AOp>oo Bop/ip>oo/io Cop/ip

大一英语期末考试试卷

Testing Paper Unit 1, 4, 5 Sky：陈人智、吴斌、马琴、苏红光 Group________ Name__________ Score_________ I. Listening (30%) I).Listen to the dialog between Gary and Paul and choose the best answer to each of the questions you hear on the recording. (2×5=10) (Unit 1 Part II Listening I) （）1.A.Eating and drinking. B. Dancing to the music. C. Standing around at the party. D. Talking with his girlfriend. （）2.A.Women who stay home doing housework. B. Women who stimulate his intellect. C. Women who pursue their own careers. D. Women who enjoy reading novels. （）3.A. Cleaning and cooking. B. Fixing things around the house. C. Washing the car and collecting the trash. D. Watching television and taking out the garbage. （）4.A.They are the same as his. B. They are quite progressive for the times. C. They reflect the views of earlier generations. D. They were shaped by their own family life. （）5.A. Visit his friend, Bob. B. Remain at the party to try to make new friends. C. Meet a woman who shares his interest in literature. D. Return home alone and spend the night with his dog. II).Listen to the passage and decide whether the following statements are true or false. Write "T" for True and "F" for False in the spaces provided. (2×5=10) (Unit 4 Part III Practice One) ______6.Women and men play different roles in society because their physical structures are very different. ______7.Girl babies were found to differ a lot from boy babies in birth length, weight and irritability. ______8.Our parents, school, television and the Internet show us how we should behave. ______9.Male cartoon characters are usually more prominent than female characters. ______10.Nowadays, women are no longer expected to play their traditional roles. III).Listen to the interview and complete the following sentences with the exact words you hear(1×10=10) (Unit 1 Part Four Section III) 11. You throw a little boy a ball, and he will try to _______it 12. A baby boy will pick up a stick and _______it_______ a gun 13. When boys play with Barbie dolls, they like to _______their hair_______ 14. Boys couldn't_______ _______ if their hair is untidy 15. Boys grow their fingernails long because they're too _______ to _______ them. 16. At an early age, boys are attracted to _______ II Words and Expressions (40%) 1.assign __________________ 2.culturally__________________ 3.genetic _________________ 4.sex-biased__________________ 5.neatness ________________ 6.nursery_____________________ 7. carry over_______________ 8.fall behind __________________

模拟电子技术基础期末试题(西安交大)

模电试题 三、计算题(每题1０分，共60分) １.某放大电路输入电阻Ri＝１0kΩ，如果用１μA电流源驱动,放大电路短路输出电流为1０ｍＡ，开路输出电压为10V。求放大电路接4kΩ负载电阻时的电压增益Av、电流增益Ai、功率增益Ａp。 2．二极管电路如图题所示,试判断图中的二极管是导通还是截止，并求出AO两端电压V AＯ。设二极管是理想的。

３.电路如图题所示，设BJT的β=8０，V BE＝０.6 V,I CＥO、V CES可忽略不计,试分析当开关Ｓ分别接通A、B、C三位置时，BJT各工作在其输出特性曲线的哪个区域，并求出相应的集电极电流Ic。 4.电路参数如图所示,FET工作点上的互导g m＝１ｍｓ,设r d>>R d。(1)画出电路的小信号模型;(2)求电压增益Av；(3)求放大器的输入电阻Ri。

5．电路如图所示,假设运放是理想的,试写出电路输出电压Ｖｏ的值。

6.由运放组成的BJT电流放大系数β的测试电路如图所示,设BJT的V ＝0．7 V。(1）求出ＢJT的c、ｂ、ｅ各极的电位值；(2)若电压表ＢE 读数为2０0mV,试求BJＴ的β值。 一、选择题(每题2分,共２0分) （1）PＮ结加正向电压时,PＮ结将。 Ａ. 变窄B．基本不变C．变宽

（2)稳压管的稳压区是其工作在。 A．正向导通B.反向截止C.反向击穿 (３）当晶体管工作在放大区时，发射结电压和集电结电压应为。A.前者反偏、后者也反偏B.前者正偏、后者反偏C. 前者正偏、后者也正偏 (４)在本征半导体中加入元素可形成N型半导体。 A.五价Ｂ. 四价C．三价 （5)当温度升高时,二极管的反向饱和电流将。 A.增大B．不变Ｃ. 减小 (６）工作在放大区的某三极管,如果当I B从１2μA增大到22μA时,I C 从1mA变为2mA，那么它的β约为。 A. 83 B. 91 C. 10０ （７）已知变压器副边电压有效值U２为１0V,采用桥式整流R L C≥3(T/2)（T为电网电压的周期)。测得输出电压平均值U O可能的数值为A.１4V B. 12V C.9V D．4．5V （８）功率放大电路的最大输出功率是在输入电压为正弦波时,输出基本不失真情况下，负载上可能获得的最大。 A.交流功率Ｂ.直流功率C.交直流功率 (9)功率放大电路的转换效率是指。 A.输出功率与晶体管所消耗的功率之比 B．最大输出功率与电源提供的平均功率之比 C.晶体管所消耗的功率与电源提供的平均功率之比

2016年大一英语期末考试试题

2016年大一英语期末考试试题 Part II Reading Comprehension (30%) (25 minutes) Directions: There are three passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the center. Questions 21 to 25 are based on the following passage: Speech, the act of uttering sounds to convey meaning, is a kind of human action. Like any other constantly repeated action, speaking has to be learned, but once it is learned, it becomes a generally unconscious and apparently automatic process. As far as we can determine, human beings do not need to be forced to speak; most babies seem to possess a sort of instinctive drive to produce speech like noises. How to speak and what to say are another matter altogether. These actions are learned from the particular society into which the baby is born; so that, like all conduct that is learned from a society, from the people around us, speech is a patterned activity. The meandering babble and chatter of a young child are eventually channeled by imitation into a few orderly grooves that represent the pattern accepted as meaningful by the people around him. Similarly, a child’s indiscriminate practice of putting things into his mouth becomes limited to putting food into his mouth in a certain way. The sounds that a child can make are more varied and numerous than the sounds that any particular language utilizes. However, a child born into a society with a pattern of language is encouraged to make a small selection of sounds and to make these few sounds over and over until it is natural for him to make these sounds and no others. 21. What is the subject of the passage? A) How to make sounds. B) The origin of language. C) A child’s learning process of speaking. D) A baby’s sounds. 22. A child’s chatter becomes speech when it ____. A) begins to follow meaningful patterns