清华大学_考研真题_应用电子学2002
2011-2012清华数字电子技术II
清华大学《数字电子技术（Ⅱ）》课程试卷2011 ~2012 学年第2 学期开课学院： 电气 课程号：15012435考试日期： 2012-6考试方式： 考试时间： 120 分钟一、填空题（每空1分，共10分）1．有一数码10010011，作为自然二进制数时，它相当于十进制数（ ），作为8421BCD 码时，它相当于十进制数（ ）。
2．将2012个“1”异或起来得到的结果是（ ）。
3．三态门电路的输出有高电平、低电平和（ ）3种状态。
4．如果对键盘上108个符号进行二进制编码，则至少要（ ）位二进制数码。
5．74LS138是3线—8线译码器，译码为输出低电平有效，若输入为A 2A 1A 0=011时，输出 01234567Y Y Y Y Y Y Y Y 依次应为（ ）。
6．驱动共阳极七段数码管的译码器的输出电平为（ ）有效。
7、555定时器的最基本应用有施密特触发器、单稳态触发器和（ ）。
8．将一个包含有32768个基本存储单元的存储电路设计成16位为一个字的ROM 。
该ROM 有（ ）根地址线，有（ ）根数据读出线。
二、单项选择题：在下列各题中，将唯一正确的答案代码填入括号内(本大题共10小题，每小题2分，共20分)1．函数F=AB+BC ，使F=1的输入ABC 组合为 ( )。
A ．ABC=000B ．ABC=010C ．ABC=101D ．ABC=110 2．一只四输入端或非门，使其输出为1的输入变量取值组合有 ( )种。
A ．15 B ．8 C ．7 D ．13．逻辑函数F 1、F 2、F 3的卡诺图如图二.3，他们之间的逻辑关系是 ( )。
A ．F 3=F 1•F 2B ．F 3=F 1+F 2C ．F 2=F 1•F 3D ．F 2=F 1+F 3图二.34. 八选一数据选择器74151组成的电路如图二.4所示，则输出函数为 ( )。
A ．BC CA BA L ++= B ．B C A CA B L ++= C ．B C CA A B L ++= D．CB CA A B L ++=5．为将D 触发器转换为T 触发器，图二.5所示电路的虚线框内应是 ( )。
数字电子技术考研真题
数字电子技术考研真题近年来，数字电子技术的应用范围越来越广泛，对于这一领域的研究和掌握有着重要意义。
考研真题是考察学生对于数字电子技术基础知识的理解和应用能力的重要途径之一。
下面将介绍一道数字电子技术考研真题，并详细解析该题目。
题目描述：设计一个8位寄存器电路，输入端有D0、D1、D2、D3四个输入信号线，输出端有Q0、Q1、Q2、Q3四个输出信号线。
当输入信号D0为1时，寄存器进行并行加载操作；当输入信号D1为1时，寄存器进行清零操作；当输入信号D2为1时，寄存器进行左移位操作；当输入信号D3为1时，寄存器进行右移位操作。
请根据以上要求设计寄存器电路。
解析：首先，根据题目要求，我们要设计一个8位的寄存器电路，输入端有D0、D1、D2、D3四个输入信号线，输出端有Q0、Q1、Q2、Q3四个输出信号线。
接下来，我们逐一解析各个输入信号的作用。
1. 输入信号D0为1时，寄存器进行并行加载操作。
在最基本的方式下，我们可以将输入信号D0与8个D触发器的D端相连，并同时将时钟信号CLK与8个D触发器的时钟端相连。
这样当D0为1时，数据会被加载到寄存器中。
2. 输入信号D1为1时，寄存器进行清零操作。
类似地，我们可以将输入信号D1与一个8选1的数据选择器的控制端相连，并将输出端与寄存器的D端相连。
当D1为1时，选择器将输出0，从而将寄存器清零。
3. 输入信号D2为1时，寄存器进行左移位操作。
同样，我们可以将输入信号D2与一个8位移位寄存器的控制端相连。
当D2为1时，移位寄存器执行左移位操作。
4. 输入信号D3为1时，寄存器进行右移位操作。
类似地，我们可以将输入信号D3与一个8位移位寄存器的控制端相连。
当D3为1时，移位寄存器执行右移位操作。
综上所述，我们可以根据题目要求设计一个基本的8位寄存器电路，其中D0、D1、D2、D3分别控制并行加载、清零、左移位和右移位操作。
当然，这只是一个基本的设计思路，具体的电路细节和原理可以根据实际需求进行进一步优化和改进。
清华电子系信号与系统真题大全
5. （ ）周期信号的 Fourier 级数必处处收敛。
6. （ ）A 和 B 均为 n × n 方阵，则必有 e(A+B)t = eAteBt 。
7. （ ）两个有限序列的圆卷积（循环卷积）必等于它们的线卷积。
8. （ ）全通系统必为无失真传输系统。
∞
9. （ ）由已知信号 f (t) 构造信号： F(t) = ∑ f (t + nT ) ，则 F(t) 为周期 n=−∞ 信号。
（2）若已经确知 Rhh (m) ，能否唯一确定 h(n) ？为什么？ （3）在已确知 Rhh (m) 的条件下，求具有最小相位特性的 h(n) 。请 给出具体过程和相应公式。 （4）在本题（1）小题中，若 x(n) 为白噪声序列， Rxx (m) = δ (m) ， 命题是否成立？为什么?（δ (m) 为单位样值序列）
（提示：F
{u(t)} =
1 + πδ (ω) ）
jω
3
Write by BITI_lilu
2002 年清华大学信号与系统
清华大学硕士生入学考试试题专用纸
准考证号
系别
考试时间
专业
考试科目
试题内容 ：
一、（8 分）已知 X (k) = DFT[x(n)] ， 0 ≤ n < N ，求： （1） x(n) 的 Z 变换 X (z) = ？ （2） x(n) 的傅立叶变换 X (e jω ) = ？
=
a 2π
∞ X (ω)Ψ*(aω)e jωbdω 成立。请予以证明，并请说明
−∞
a、b
的含义。式中， a > 0,b > 0 。
七 、（ 10 分 ） 若 f (t) 的 傅 立 叶 变 换 F(ω) 为 ω 的 实 因 果 信 号 ， 即
清华大学机械工程(汽车系)考研 招生人数 参考书 报录比 复试分数线 考研真题 考研经验 招生简章
爱考机构考研－保研－考博高端辅导第一品牌汽车工程系机械工程专业招生目录院系所、专业及研究方向招生人数考试科目备注015 汽车工程系 2080200机械工程01车辆工程①101思想政治理论②201英语一或203日语③301数学一④824工程力学（理论力学及材料力学）复试时专业综合考试内容：汽车理论与设计、控制工程基础、应用电子学。
080700动力工程及工程热物理01动力机械及工程①101思想政治理论②201英语一或203日语③301数学一④825工程热力学复试时专业综合考试内容：车用发动机原理及设计、控制工程基础、应用电子学。
085234车辆工程 3 专业学位01车辆工程领域①101思想政治理论②201英语一或203日语③301数学一④824工程力学（理论力学及材料力学）复试时专业综合考试内容：汽车理论与设计、控制工程基础、应用电子学。
汽车工程系机械工程专业简介机械工程（车辆工程）一、适用学科、专业：机械工程（一级学科，工学门类，学科代码：0802）l 车辆工程（二级学科、专业，学科代码：080204）二、学分要求：攻读硕士学位研究生期间，学位要求总学分不少于23学分（考试学分不少于17），其中公共必修学分5，必修环节学分2，学科专业学分不少于16 。
自学课程学分另计。
三、课程设置1、公共必修学分（≥5学分，考试）（1）马克思主义理论课程l 自然辩证法(60610012) 2学分（考试）l 社会主义与当代世界(60610021) 1学分（考试）（2）第一外国语（基础部分）(60640012) 2学分（考试）2、学科专业要求学分（≥16学分）（1）基础理论课（≥3学分）l 数学类公共课程（考试）（2）专业基础课（≥3学分）l 高等动力学(70330124) 4学分（考试）l 弹塑性力学(60330084) 4学分（考试）l 工程振动的试验与分析(60330063) 3学分（考试）l 有限元法与应用(70150303) 3学分（考试）l 现代控制理论(60250074) 4学分（考试）l 数字信号处理(64030023) 3学分（考试）l 微型计算机系统接口技术(60240063) 3学分（考试）l 其它专业的基础课（考试/考查）（3）专业课（≥8学分）l 汽车动力学(70150023) 3学分（考试）l 汽车动态系统CAE与振动控制(70150173) 3学分（考试）l 动态测试与分析(70150104) 4学分（考试）l 车辆控制工程(70150113) 3学分（考试）l 汽车结构CAE分析(70150323) 3学分（考试）l 机械最优化设计(80150013) 3学分（考试）l 振动模态分析与试验(80150523) 3学分（考试）l 汽车及其动力发展前沿(80150042) 2学分（考查）l 汽车环境保护技术(80150052) 2学分（考试）l 全校各系（院、所）开设的研究生专业课或专业基础课（考试/考查）3、必修环节（≥2学分）l 文献综述与选题报告(69990021) 1学分（考查）l 学术活动(69990031) 1学分（考查）要求至少参加10次学术活动，填写学术活动记录，每次写500字以上的小结，由导师确认并签字，在毕业的前一学期交到系研究生办录入成绩及学分。
[教育学]电子技术基础一02234历年试卷和答案
![[教育学]电子技术基础一02234历年试卷和答案](https://uimg.taocdn.com/bea26be4580216fc710afd07.webp)
全国2002年4月高等教育自学考试电子技术基础(一)试题课程代码：02234一、单项选择题(本大题共15小题，第1—10小题，每小题1分，第11—15小题，每小题2分，共20分)在每小题列出的四个选项中只有一个选项是符合题目要求的，请将正确选项前的字母填在题后的括号内。
1.当P—N结承受反向电压时，其内部电流关系为( )A.扩散电流大于漂移电流B.扩散电流等于漂移电流C.扩散电流小于漂移电流D.无法确定2.半导体三极管的特点是( )A.输入电流控制输出电流B.输入电压控制输出电压C.输入电流控制输出电压D.输入电压控制输出电流3.图示电路，R F引入了( )A.串联电流负反馈B.串联电压负反馈C.并联电压负反馈D.正反馈4.共模抑制比K CMRR是( )A.差模输入信号与共模输入信号之比B.输入量中差模成份与共模成份之比C.差模放大倍数与共模放大倍数(绝对值)之比D.交流放大倍数与直流放大倍数(绝对值)之比5.与八进制数(537)８相等的十六进制数是( )A.(17C)16B.(16B)16C.(17B)16D.(16C)166.四变量逻辑函数F(ABCD)的最小项m8为( )A.ABC DB.A BC DC.A B CDD.ABCD7.电路如图所示，设灯F亮为逻辑1，灭为逻辑0，开关A、B的逻辑状态如图中所示，则灯Ｆ与开关A、B的逻辑关系为( )A.F=A+BB.F=A B+A BC.F+ABD.D=AB+AB8.图示电路，当EN=1时，F的状态为( )A.F=0B.F=1C.F=AD.F=A9.基本RS触发器，当R D，S D都接高电平时，该触发器具有( )A.置“1”功能B.保持功能C.不定功能D.置“0”功能10.图示逻辑符号代表( )A.或非门电路B.与或非门电路C.集电极开路与非门电路(OC门)D.异或门电路11.NPN型三极管工作于饱和状态时，三个电极的电位关系为( )A.U B>ＵC,U B>U EB.U E>U C,U C>U BC.U C>U B>U ED.U E>U B>U C12.图示电路，若β=100,UＢE=0.7伏，则静态基极电流I BQ等于( )A.6μAB.8μAC.9.5μAD.10.5μA13.图示OCL功率放大电路，在输入u i为正弦电压时，互补管T2、T3的工作方式为( )A.甲类B.乙类C.始终截止D.甲乙类14.图示LC振荡电路，为了满足振荡的相位条件，应将( )A.1与4连接，2与5连接B.1与5连接，2与4连接C.2与3连接，4与5连接D.1与3连接，2与4连接15.图示电路，变压器副边电压u2=2U2sinωt V,该电路的输出特性(外特性)，应是图中( )A.①B.②C.③D.④二、多项选择题(本大题共5小题，每小题2分，共10分)在每小题列出的五个选项中有二至五个选项是符合题目要求的，请将正确选项前的字母填在题后的括号内。
清华大学2002年
清华大学2002年博士研究生入学考试试题Part Ⅰ Listening Comprehension (20%)Directions: You will hear a news story about the explosion on the World Trade Center in New York City. Listen to it and fill out the table with the information you've heard for questions 1—5. Some of the information has been given to you in the table. Write no more than 3 words in each numbered box. Put your answers on the ANSWER SHEET. You will hear the recording only once.Directions:You will hear a customer calling a car rental service to rent a car. For questions 6—10, complete the sentences and answer the questions while you are listening. Use no more than 3 words for each answer. Put your answers on the ANSWER SHEET. You will hear the recording twice.Directions: In this section you will hear a radio program. This program is about the production of postage stamps. Listen to the recording and either choose the correct answer for each statement orcomplete the notes as required. Circle the letter of your choice and then mark the corresponding letter on the ANSWER SHEET with a single line through the center. You will hear the recording, twice.A. topics suggested by listeners C. listeners'A. difficultB. give an opinioA. a group of graphic artistsA. only if tQuestions (16～18): Complete the notes using no more than 3 words for each answer, andthen put your answer on the ANSWER SHEET.Stamps must represent aspects of (16)_____________________e. g. characters from literature orA favoriteAB. too much attention is devotedPart Ⅱ Vocabulary (10%)Directions:There are 20 incomplete sentences in this part. For each sentence there are four choices marked A, B, C and D. Choose the best one that completes the sentence and then mark the corresponding letter on the ANSWER SHEET with a single line through the center21. The day was breaking and people began to go to work so the murderer was unable to __________A. dispenseB. disposeC. discardD.22. Can you imagine! 0to break my contract. That's __________.Of course I didn't agree.A. fraudB. blackmailC. briberyD. compensation23. Her remarks __________A. magnifiedB. maintainedC. manipulatedD. manifested24. I should be able to finish the task on time, __________ you provide me with theA. in caseB. provided thatC. or elseD.25. The unfortunate death of the genius poet caused __________loss to thisA. pricelessB. countlessC. incalculableD.26. Before the disastrous earthquake there was __________A. massiveB. ominousC. suspendingD.27. On behalf of my company, I am __________to you and your colleagues for yourA. subjectedB. inclinedC. availableD.28. The appearance of the used car is __________,A. descriptiveB. indicativeC. deceptiveD.29. His office is __________to the President's; it usually takes him about threeA. relatedB. adhesiveC. adherentD.30. The none of students in the class likes the mistress, who is used to being __________A. emotionalB. optimisticC. interestedD.31. I didn't know it then, but this disruptive way of reading started with the very firstA. harmfulB. persistentC. interruptiveD.32. The problem is that the loss of confidence among the soldiers can be highly contagiousA. spreadingB. contemptibleC. contentedD.33. The sales manager was so adamant about her idea that it was out of the questionfor anyoneA. adaptableB. anxiousC. firmD.34. Other non-dominant males were hyperactive; they were much more active than is normal,A. hardly activeB.C. extremely inactiveD.35. While he was not dumber than an ox, he was not any smarter; so most of his classmates were lenientA. helpfulB. mercifulC. enthusiasticD.36. Before the construction of the road, it was prohibitively expensive to transport anyA. determinedlyB. incrediblyC. amazinglyD.37. At dusk, Mr. Hightower would sit in his old armchair in the backyard and wistfully lose in reminiscence of his youth romanA. hopefullyB. reflectivelyC. sympatheticallyD.38. The prodigal son spent his money extravagantly and soon after he left home heA. lavishlyB. economicallyC. thriftilyD.39. The chimney vomitedA. ignitedB. immersedC. emittedD.40. The rear section of the brain does not contract with age, and one can continueA. advancedB. growingC. frontD.Part ⅢReading Comprehension (40%)Directions: There are 4 reading 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 then mark the corresponding letter on the ANSWER SHEETQuestions 41 to 45 are based on the following passage:Motorola Inc., the world's second-largest mobile phone make, will begin selling all of the technology needed to build a basic mobile phone to outside manufacturers, in a key change of strategy. The inventor of the cell phone, which has been troubled by missteps compounded by a recent industry slump in sales, is trying to become a neutral provider of mobile technology to rivals, with an eye toward fostering a much larger market than it could create itself. The Chicago area-based company, considered to have the widest range of technologies needed to build a phone, said it planned to make available chips, a design layout for the computer board, software, development tools and testing tools. Motorola has previously supplied mobile phone manufacturers with a couple of its chips, but this is the first time the company will offer its entire line of chips as well as a detailed blueprint. Mobile phones contain a variety of chips and components to control power, sound and amplification. Analysts said they liked the new strategy but were cautious about whether Motorola's mobile phone competitors would want to buy theThe company, long known for its top-notch (等级) engineering culture, is hoping to profit from its mobile phone technology now that the basic technology to build a mobile phone has largely become a commodity. Motorola said it will begin offering the technology based on the next-generation GPRS (Global Packet Radio Service) standard because most mobile phone makers already have technology in place for current digital phones. GPRS offers faster access to data through “always on” network connections, and customers are charged only for the infoBurgess said the new business will not conflict with Motorola's own mobile phone business because the latter will remain competitive by offering advanced features and designs. Motorola's phones have been criticized as being too complicated and expensive to manufacture, but Burgess said Motorola will simplify the technology in the phones by a third. In addition to basic technology, Burgess said, Motorola would also offer additional features such as Bluetooth, a technology that allows wireless communications at a short distance, and Global Positioning System, which tracks the user's whereabouts, and MP3 audio capability.A. slouch C. increaseB. is trying to become a mobile technology provider besides being a mobileB. the technology offered by Motorola will be selected by its competitorsA. Bluetooth featuresC. Global Positioning System45. Which of the following statements is NOT true?A. GPRS offers faster access to data through network connections, so customers should payC. Previously MotD. Motorola Inc. is known for its high-Questions 46 to 50 are based on the following passage:Hurricanes are violent storms that cause millions of dollars in property damage and takeHurricanes normally originate as a small area of thunderstorms over the Atlantic Ocean west of the Cape Verde Islands during August or September. For several days, the area of the storm increases and the air pressure falls slowly. A center of low pressure forms, and winds begin toHurricane hunters then fly out to the storm in order to determine its size and intensity and to track its direction. They drop instruments for recording temperature, air pressure, and humidity (湿度), into the storm. They also look at the size of waves on the ocean, the clouds, and the eye of the storm. The eye is a region of relative calm and clear skies in the center of the hurricane. People often lose their lives by leaving shelter when the eye has arrived, only to be caught in tremendousOnce the forecasters have determined that it is likely the hurricane will reach shore, they issue a hurricane watch for a large, general area that may be in the path of the storm. Later, when the probable point of landfall is clearer, they will issue a hurricane warning for a somewhat more limited area. People in these areas are wise to stock up on nonperishable foods, flash light and radio batteries, candles, and other items they may need if electricity and water are not available after the storm. They should also try to hurricane-proof their houses by bringing in light-weight furniture and other items from outside and covering windows. People living in low-lying areas are wise to evacuate their houses because of the storm surge, which is a large rush of water that may come ashore with the storm. Hurricanes generally lose power slowly while traveling over land, but many move out to sea, gather up force again, and return to land. As they move toward the north,46. The eye of47. Which of the following statements is true?A. A storm surge is a48. Which of the following would be the best title for this passage?C. The dangerous Hurricane49. The low-A. close to the ground levelB. one-C. flat housesA. taking out heavy thingsB. moving in light-C. equipping the house with stonesQuestions 51 to 55 are based on the following passage:Attacking an increasingly popular Internet business practice, a consumer watchdog group Monday filed a complaint with the Federal Trade Commission, asserting that many online search engines are concealing the impact special fees have on search results by Internet users. Commercial Alert, a 3-year-old group founded by consumer activist Ralph Nader, asked the FTC to investigate whether eight of the Web's largest search engines are violating federal laws againstThe group said that the search engines are abandoning objective formulas to determine the order of their listed results and selling the top spots to the highest bidders without making adequate disclosures to Web surfers. The complaint touches a hot-button issue affecting tens of millions of people who submit search queries each day. With more than 2 billion pages and more than 14 billion hyperlinks on the Web, search requests rank as the second most popular online activity after E-The eight search engines named in Commercial Alert's complaint are: MSN, owned by Microsoft; Netscape, owned by AOL Time Warner; Direct hit, owned by Ask Jeeves; HotBot and Lycos, both owned by Terra Lycos; Altavista, owned by CMGI; LookSmart, owned by LookSmart;Portland, Ore.-based Commercial Alert could have named more search engines in its complaint, but focused on the biggest sites that are auctioning off spots in their results, said Gary“Search engines have become central in the quest for learning and knowledge in our society. The ability to skew (扭曲）the results in favor of hucksters (小贩）without telling consumers is a serious problem.” Ruskin said. By late Monday afternoon, three of the search engines had responded to The Associated Press' inquiries about the complaint. Two, LookSmart and AltaVista, denied the charges. Microsoft spokesman Matt Pilla said MSN is deliveringThe FTC had no comment about the complaint Monday. The complaint takes aim at the new business plans embraced by more search engines as they try to cash in on their pivotal (关键）role as Web guides and reverse a steady stream of losses. To boost revenue, search engines in the past year have been accepting payments from businesses interested in receiving a higher ranking inA. Sending pages of informationB. Sending E-C. Surfing the net53. Which of the following is NOT a correct statement?A. There are too many pages or hyperlinks on the Internet, so people usually use search engine toB. More than 8 search engines are accused of selling their search engine spots by CommercialC. The headquarA. LookSmartC. Altavista55. The primary aim ofQuestions 56 to 60 are based on the following passage:D. H. Lawrence was the fourth child of Arthur Lawrence and Lydia Beardsall, and their first to have been born in Eastwood. Ever since their marriage in 1875, the couple had been on the move: Arthur's job as a miner had taken them where the best-paid work had been during the boom years of the 1870s, and they had lived in a succession of small and recently built grimy colliery villages all over Nottinghamshire. But when they moved to Eastwood in 1883, it was to a place where they would remain for the rest of their lives; the move seems to have marked a watershed inFor one thing, they were settling down: Arthur Lawrence would work at Brinsley colliery until he retired in 1909. For another, they now had three small children and Lydia may have wanted to give them the kind of continuity in schooling they had never previously had. It was also the case that, when they came to Eastwood, they took a house with a shop window, and Lydia ran a small clothes shop: presumably to supplement their income, but also perhaps because she felt she could do it in addition to raising their children. It seems possible that, getting on badly with her husband as she did, she imagined that further children were out of the question. Taking on theArthur's parents lived less than a mile away, down in Brinsley, while his youngest brother Walter lived only 100 yards away from them in another company house, in Princes Street. When the family moved to Eastwood, Arthur Lawrence was coming back to his own family's center: oneLydia Lawrence probably felt, on the other hand, more as if she were digging in for a siege. East wood may have been home to Arthur Lawrence, but to Lydia it was just another grimy colliery village which she never liked very much and where she never felt either much at home or properly accepted. Her Kent accent doubtless made Midlands people feel that she put on airs.57. Which of the following is NOT the reason for D. H. Lawrence's family settling down in East wood?D. D. H.58. Which of the following might be an image of D. H. Lawrence's mother in other people's mind?C. An arrogant woman.B. the father could find better-paid jobs in the prosperity of60. Which of the following statement is NOT true?B. DPart Ⅳ Cloze (10%)Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D. You should choose the ONE that best fits into the passage and then markThe history of African—Americans during the past 400 years is traditionally narrated__61__an ongoing struggle against__62__and indifference on the part of the American mainstream, and a struggle__63__as an upward movement is__64__toward ever more justice andTechnology in and of__65__is not at fault; it's much too simple to say that gunpowder or agricultural machinery or fiber optics__66__been the enemy of an__67__group of people. A certain machine is put__68__work in a certain way the purpose__69__which it was designed. The people who design the machines are not intent on unleashing chaos; they are usually trying to__70__a task more quickly, cleanly, or cheaply, __71__the imperative of innovation andMastery of technology is second only__73__money as the true measure of accomplishment in this country, and it is very likely that by__74__this under-representation in the technological realm, and by not questioning and examining the folkways that have__75__it, blacks are allowing__76__to be kept out of the mainstream once again. This time, however, they will be__77__from the greatest cash engine of the twenty-first century. Inner-city blacks in particular are in danger, and the beautiful suburbs __78__ring the decay of Hartford, shed the past and learnAnd blacks must change as well. The ways that__79__their ancestors through captivity and coming to freedom have begun to loose their utility. If blacks__80__to survive as full participants61. A. like B. as C. for62. A. charity B. clarity C. cohesion63. A. charting B. charts C. charted64. A. progressing B. progressed C. clutched65. A. itself B. themselves C. ourselves66. A. have B. to have67. A. entirely B. enter68. A. for B. off C. on69. A. for B. to C. with70.A. envelop B. accomplish C. enveloping71. A. followed B. follows C. to follow72. A. since B. on C. in73. A. before B. to74. A. to tolerate B. tolerate C. tolerated75. A. encountered B. encountering76. A. them B. us C. themselves D.77. A. excluding B. included C. including78. A. where B. that C. how79. A. servicing B. encircle80. A. is B. were C. arePart ⅤDirections: In this part there is a short passage with five questions or incomplete statements. Read the passage carefully, then answer the questions or complete the statements in the fewer possibleThe years between 1870 and 1895 brought enormous changes to the theater in the United States as the resident company was undermined by touring groups, as New York became the only major center of production, and as the long run replaced the repertory (库存) system. By 1870, the resident stock company was at the peak of its development in the United States. The 50 permanent companies of 1870, however, had dwindled to 20 by 1878, to 8 by 1880, to 4 by 1887, and hadWhile the causes of this change are numerous, probably the most important was the rise of the “combination” company (that is, one that travels with stars and full co mpany). Sending out acomplete production was merely a logical extension of touring by stars. By the 1840's many major actors were already taking along a small group of lesser players, for they could not be sure that local companies could supply adequate support in secondary roles.There is much disagreement about the origin of the combination company. Bouciault claimed to have initiated it around 1860 when he sent out a troupe with Colleen Bawn, but a book published in 1859 speaks of combination companies as already established. Joseph Jefferson Ⅲalso declared that he was a pioneer in the movement. In actuality, the practice probably began tentatively during the 1850's, only to be interrupted by the Civil War. It mushroomed in the 1870's, as the rapid expansion of the railway system made it increasingly feasible to transport full productions. In 1872, Lawrence Barrett took his company, but no scenery, on tour; in 1876, Rose Michel was sent out with full company, scenery, and properties. By the season of 1876—187781. What was the trend for the resident stock companies at the end of the 19th century?_________________________________________________________________________82. According to the passage, the major reason for the decline of the resident stock companies _________________________________________________________________________83. Why did many important actors join some minor players in 1840's?__________________________________________________________________________________________________________________________________________________85. Why is Lawrence Barrentt mentioned in the passage?_________________________________________________________________________Part Ⅵ Writing (15%)Directions: In this part, you are asked to write a composition on the title of “My View on an Admission Interview for Ph. D. Can didates” with no less than 200 English words. Your composition should be based on the following outline given in Chinese. Put your composition on1. 博士研究生入学面试是否必要？2. 在博士研究生入学面试中，你认为最重要的是展示哪几个方面？3. 你将如何展示这个方面？。
【盛世清北】2021清华深圳国际研究生院考研备考指南及高分经验分享
【盛世清北】2021清华深圳国际研究生院考研备考指南及高分经验分享以下内容由盛世清北搜集整理，主要针对清华深圳国际研究生院考研进行说明。
深圳国际研究生院，院系代码为599，专业包含建筑学、电子信息、机械、材料与化工、资源与环境、能源动力、土木水利、会计、物流工程与管理、化学、公共管理、精准医学与公共健康。
初试时间安排2021届清华考研初试将于2020年12月26日-28日进行，具体时间安排如下：12月26日上午8:30-11:30思想政治理论、管理类联考综合能力12月26日下午14:00-17:00外国语12月27日上午8:30-11:30业务课一12月27日下午14:00-17:00业务课二12月28日考超过3小时的考试科目，上午8:30开始，不超过14:30结束研究方向及初试内容建筑学，专业代码：085100方向：01(全日制)未来人居设计科目：①101 思想政治理论②201 英语一③355 建筑学基础④511 建筑设计（6 小时）电子信息，专业代码：085400方向：01(全日制)电子与通信工程科目：①101 思想政治理论②201 英语一③301 数学一④985 信号与系统方向：02(全日制)计算机技术科目：①101 思想政治理论②201 英语一③301 数学一④912 计算机专业基础综合方向：03(全日制)人工智能科目：①101 思想政治理论②201 英语一③301 数学一④827 电路原理方向：04(全日制)大数据工程科目：①101 思想政治理论②201 英语一③301数学一④962数学-数据方向基础综合方向：05(全日制)互动媒体设计与技术科目：①101 思想政治理论②201 英语一③302数学二④971互联网+创新设计专业基础综合方向：06(全日制)生物医学工程科目：①101 思想政治理论②201 英语一③301 数学一④985 信号与系统科目：①101 思想政治理论②201 英语一③301 数学一④822 控制工程基础方向：08(全日制)智能制造科目：①101 思想政治理论②201 英语一③301 数学一④822 控制工程基础方向：09(全日制)海洋技术与工程科目：①101 思想政治理论②201 英语一③301 数学一④827 电路原理方向：10(全日制)互联网＋创新设计科目：①101 思想政治理论②201 英语一③302数学二④971互联网+创新设计专业基础综合方向：11(全日制)集成电路与系统科目：①101 思想政治理论②201 英语一③301 数学一④985 信号与系统机械，专业代码：085500方向：01(全日制)智能制造科目：①101 思想政治理论②201 英语一③301 数学一④905 机械设计基础材料与化工，专业代码：085600方向：01(全日制)功能材料与器件02(全日制)制药工程科目：①101 思想政治理论②201 英语一③301 数学一④975 材料物理化学资源与环境，专业代码：085700方向：01(全日制)环境工程02(全日制)海洋技术与工程科目：①101 思想政治理论②201 英语一③301 数学一④951 环境科学与工程原理能源动力，专业代码：085800方向：01(全日制)电气工程02(全日制)海洋能源工程科目：①101 思想政治理论②201 英语一③301 数学一④827 电路原理土木水利，专业代码：085900方向：01(全日制)海洋技术与工程02(全日制)海洋能源工程科目：①101 思想政治理论②201 英语一③301 数学一④980 结构力学会计，专业代码：125300方向：01(非全日制)清华大学高级财务管理与大数据硕士项目科目：①199 管理类联考综合能力②204 英语二物流工程与管理，专业代码：125604科目：①199 管理类联考综合能力②204 英语二化学，专业代码：070300方向：01(全日制)化学生物学（制药）科目：①101 思想政治理论②201 英语一③645 综合化学④930 化学生物学公共管理，专业代码：120400方向：01(全日制)医院管理02(非全日制)医院管理（统考）科目：①101 思想政治理论②201 英语一③685 逻辑学④973 医管专业基础综合（含医学基础理论和管理学基础）方向：03(非全日制)医院管理（单考）科目：①111 单独考试思想政治理论②251 单独考试英语③685 逻辑学④973 医管专业基础综合（含医学基础理论和管理学基础）精准医学与公共健康，专业代码：0831J4方向：01(全日制)BIO³生命技术科目：①101 思想政治理论②201 英语一③301 数学一④972 BIO³生命技术专业基础综合近3年招生人数PS：清华深圳国际研究生院专业学位2019年未进行招生，2021年招生人数较2020年减少23人。
模拟电子技术基础 清华大学 完整版
计算机领域： 包括计算机 硬件、软件、
网络等
工业领域： 包括自动化 控制、机器 人、智能制
造等
医疗领域： 包括医疗设 备、医疗器 械、远程医
疗等
军事领域： 包括武器装 备、雷达、
通信等
航空航天领 域：包括飞 机、卫星、
火箭等
电子技术的未来发展趋势
智能化：人工智 能、机器学习等 技术在电子技术 中的应用将更加 广泛。
考虑器件的参数和性能是否满足电路要 求
单击此处输入你的正文，请阐述观点
考虑器件的价格和可用性，选择性价比高 的器件
单击此处输入你的正文，请阐述观点
模拟电子器件的封装形式及选用原则
单击此处输入你的项正文，请尽量言简意赅的阐述观点。 模拟电子器件的选用原则 单击此处输入你的项正文，请尽量言简意赅的阐述观点。 单击此处输入你的项正文，请尽量言简意赅的阐述观点。 单击此处输入你的项正文，请尽量言简意赅的阐述观点。 单击此处输入你的项正文，请尽量言简意赅的阐述观点。
放大电路的分 类：根据电路 结构和性能特 点，可以分为 共射、共集、 共基和场效应 管放大电路等。
放大电路的应 用：在通信、 音响、仪表等 领域得到广泛 应用，为人们 的生活和工作 带来便利。
放大电路的频率响应及稳定性分析
稳定性分析：通过相位裕度、 增益裕度等指标评估电路稳 定性
频率失真：分析不同频率下 的非线性失真
案例分析：调制解调器、滤波 器等
案例总结与展望
控制系统中的应用案例分析
模拟电子技术在控制系统中的应用概述 模拟电子技术在温度控制系统中的应用案例 模拟电子技术在压力控制系统中的应用案例 模拟电子技术在位置控制系统中的应用案例
感谢观看
汇报人：
考研专业课之清华大学电路原理简介
考研专业课之清华大学电路原理简介第一讲专业信息介绍一、清华大学电机系简介：1.概况：清华大学电机工程与应用电子技术系即原电机工程系，创建于1932年。
随着科学技术的发展，本系早已突破了传统的学科范围，在电气工程的基础上，扩展到计算机、电子技术、自动控制、系统工程、信息科学等新科技领域，开拓了许多新的研究方向。
电机系拥有一级学科"电气工程"下属的全部五个二级学科：电力系统及其自动化、高电压与绝缘技术、电机与电器、电工理论与新技术、电力电子与电力传动。
五个二级学科均各自首批获得硕士和博士学位授予权，前四个在1989年和2002年均被评为全国重点学科。
1996年，电机系成为国家首批一级学科博士学位授权的试点单位。
在2003年电气工程一级学科评估中，电机系电气工程学科不仅整体水平获得全国第一，并在学术队伍、科研成果、人才培养、学术声誉所有四个单项中均名列全国第一。
2006年电机系电气工程学科又以满分100分的成绩获得一级学科评估全国第一。
电机系拥有"电力系统与发电设备控制与仿真"国家重点实验室。
2.研究机构：目前电机系共有五个研究所和两个教学组，如下：研究所/教学组名称所长/组长副所长/副组长电力系统研究所闵勇康重庆、梅生伟、鲁宗相柔性输配电系统研究所刘文华沈斐、陆超高电压及绝缘技术研究所何金良张贵新、高文胜电力电子与电机系统研究所肖曦孙宇光、王善铭电工新技术研究所袁建生朱桂萍、黄松岭电工学教学组唐庆玉计算机硬件及应用教学组刘建政3.师资力量：电机系拥有中科院院士1 位（卢强，瑞典皇家工程科学院外籍院士）、中国工程院院士1 位（韩英铎），IEEE Fellow 3 位（蔡宣三、卢强、何金良），IEE Fellow 1 位（关志成），长江学者特聘教授1 位（孙元章），国家杰出青年基金获得者4 人（孙元章、梁曦东、何金良、梅生伟），教育部跨世纪优秀人才1人（袁建生)，教育部新世纪优秀人才6人（周远翔、孙宏斌、曾嵘、刘文华、康重庆、姜齐荣），清华大学"百名人才引进计划"教授1名（江伟华）。
爱他教育清华大学827电路原理考研资料历年真题笔记讲义
考研，对于现在的我而言已经成为了过去时，但现在想来依旧是那种感觉——值得记忆回味。
大半年的时间都在朝着这同一个目标而努力，哭过、笑过，但无论如何我还是走过来了，现在一切终于尘埃落定，希望可以把我的一些经历跟大家分享。
清华大学电路原理827全套考研资料详细介绍：（全网最全，不断更新）一.清华大学研究生入学考试电路原理1989年至2012年的打印版标准真题说明：由于清华大学是不出售历年真题及资料的,所以现在市场上流动的历年真题都是回忆手写版的，都没有答案，而且试卷有很多地方难以辨认，而且试卷上有很多做题痕迹，不便于自测。
所以此套清华题库精心编排的打印版真题清晰综合，适合模拟测试。
清华考研试题不公开市面上比较难买到，这是清华题库拿出来的一手内部资料应该是比较齐全的了。
由于出题老师比较固定，从本人今年考试经验看来，历年真题参考价值非常大。
强烈推荐！！二、绝对真实的清华大学2013年电路原理真题，适合电气及自动化考生。
研究生考试用，由于商品特殊只售20份，售完为止。
绝对原创，独此一家。
手写版本，2013年考生考场记录下来，有图，有文字，有数据，100%呈现，单卖120元！三、电路原理学习指导与习题集(第2版)复印版本《电路原理学习指导与习题集(第2版)》是电路原理课程的教学参考书，涵盖了电路原理课程的主要内容。
全书共分17章，包括电路元件与电路定律、电路的等效变换、线性电阻电路的一般分析方法、电路定理及应用、非线性电路、二端口网络、一阶电路、二阶电路、状态变量法、拉普拉斯变换、正弦稳态电路分析、有互感的电路、电路中的谐振、三相电路、周期性激励下电路的稳态响应、网络图论基础和均匀传输线。
附录为OrCAD／PSpice电路仿真分析简介。
每章均结合重点作了内容小结，给出了相应的例题及详细的解答，并指出了应注意的问题。
章后附有大量习题，内容丰富。
书末附有参考答案。
四、清华大学硕士研究生入学考试:电路原理试题选编(第2版)《清华大学硕士研究生入学考试:电路原理试题选编(第2版)》主要补充了近几年清华大学硕士研究生入学考试电路原理试题。