中传通信考研复试数字电路09年真题答案
考研真题(2009-2011)
注：只有Ⅰ和Ⅲ的转换不会引起精度的变化
“定点数表示与加/减运算”试题(1) 【2009年计算机联考真题】 一个C语言程序在一台32位机器上运行。程序中定义了三 个变量x、y、z，其中x和z为int型，y为short型。当 x=127、y=-9时，执行赋值语句z=x+y后，x、y、z的 值分别是( D )。 A.x=0000007FH，y=FFF9H，z=00000076H B.x=0000007FH，y=FFF9H，z=FFFF0076H C.x=0000007FH，y=FFF7H，z=FFFF0076H D.x=0000007FH，y=FFF7H，z=00000076H -14 2 【2010年计算机联考真题】 -112 8 假定有4个整数用8位补码分别表示r1=FEH，r2=F2H， r3=90H，r4=F8H，若将运算结果存放在一个8位寄存 器中，则下列运算会发生溢出的是( B )。 A.r1r2 B.r2 r3 C.r1 r4 D. r2 r4
“高速缓冲存储器”试题(2)续
假定int类型用32位补码表示，程序编译时，i、j和sum均分配在寄 存器中，数组a按行优先方式存放，其首地址为320(十进制数)。 请回答下列问题，要求说明理由或给出计算过程。 1)若不考虑用于Cache一致性维护和替换算法的控制位，则数据 Cache的总容量为多少？ 2)数组元素a[0][31]和a[1][1]各自所在的主存块对应的Cache行号分 别是多少(Cache行号从0开始)？ 3)程序A和B的数据访问命中率各是多少？哪个程序的执行时间更短?
“存储器的分类”试题
【2011年计算机联考真题】 下列各类存储器中，不采用随机存取方式的是( B )。 A.EPROM B.CDROM C.DRAM D.SRAM
2009综合--含答案
全国通信专业技术人员职业水平考试2009年通信专业综合能力(初级)●数字通信的宽带化即高速化，指的是以每秒 (1) 比特以上的速度，传输换从语音到数据以至图像的各种信息。
(1) A. 几兆 B. 几十兆 C. 几百兆 D. 几千兆●个人化是指“服务到家”的通信方式变为服务到（2）的通信方式。
(2) A. 终端 B. 交换点 C. 办公室 D. 人●科技工作者的职业道德有许多内容，其核心内容是(3) 。
(3) A. 不图名利，服从需要 B. 造福人民，振兴祖国C. 遵守纪律，不畏艰苦D. 质量第一，不断创新●通信科技工作者职业道德的最高宗旨是树立 (4) 。
(4) A. 献身科学观念 B. 科学发展观念C. 服务保障观念D. 质量第一观念●电信监管的原则有(5) 。
(5) A. 普遍服务原则 B. 公开、公平、公正原则C. 遵守商业道德原则D．质量第一原则●电信服务质量评判的标准是(6) 。
(6) A.用户满意程度 B. 服务性能质量C. 用户期望质量D. 网络性能质量●就目前情况看，基础电信业务的定价，占主导地位的是(7) 。
(7) A.政府定价和政府指导价B. 政府定价和市场调节价C. 听证会价格和市场调节价D. 政府指导价和市场调节价●用户安装电话不仅给本人带来效用，还会使网络中原有用户的效用增加，这个特点体现了电信网络的（8）。
(8) A. 服务性 B. 互通性 C. 规模性 D. 外部性●我国电信网间通话结算办法是以(9) 为基础，并兼顾其他有关情况制定的。
(9) A．成本 B. 信息量 C. 资费 D. 用户数●按照合同达成目标进行分类，产生新的劳动成果合同，属于(10) 。
(10) A. 提供劳务的合同 B. 完成工作的合同C. 有偿合同D. 双务合同2009通信初级上午试卷第2页共12页●电信网的拓扑结构经常采用以下几种形式。
在相同的网络规模条件下，采用 (11) 拓扑结构的网络既具有较高的可靠性又具有较好的经济性。
2009年考研真题解析-计算机组成原理
七、输入输出系统
二、综合应用题
43. (8分)某计算机的CPU主频为500MHz，CPI为5（即执行每条指令 平均需5个时钟周期）。假设某外设的数据传输率为0.5MB/s，采用 中断方式与主机进行数据传送，以32位为传输单位，对应的中断服 务程序包含18条指令，中断服务的其他开销相当于2条指令的执行时 间。请回答下列问题，要求给出计算过程。 （1）在中断方式下，CPU用于该外设I/O的时间占整个CPU时间的 百分比是多少？ (1) 在中断方式下，CPU每次用于数据传送的时钟周期数： 5×18+5×2=100 (2分) 为达到0.5MB/s的数据传输速度，外设每秒申请中断次数： 0.5M/(32/8)=125000 (1分) 1秒钟内用于中断的开销： 100×125000=12.5M个时钟周期 (1分) CPU用于外设I/O的时间占整个CPU时间的百分比： 12.5M/500M=2.5% (1分)
2009年考研真题解析
——组成原理
考试题型
单项选择题（40小题，每小题2分，共80分）
基本概念、基本原理和方法，注重记忆类知识点
运用基本原理和基本方法，分析、判断和解决有关 理论问题和实际问题 2009年考试包括
综合应用题（70分）
2道数据结构 2道计算机组成原理 2道操作系统 1道计算机网络
11
12 13
冯· 诺依曼计算机
整型加法计算 浮点加法计算
14
15 21
Cache组相联映射方式
存储器芯片组成 Cache命中率的计算 四、指令系统 五、CPU 六、总线
16
17 18 19 20 22
采用相对寻址的转移指令
2009年中国传媒大学广播电视艺术基础考研真题
中国传媒大学《广播电视艺术基础》2009年硕士研究生入学考试试题2009年中国传媒大学广播电视艺术基础真题简答题谈话节目谈话节目，是当今社会比较“火爆”的电视节目形态之一。
在西方国家，电视“脱口秀”（talk show）的影响与威力越来越大，成为一道独特的文化景观，一把解读西方社会政治、经济、文化的钥匙。
在我国，继20世纪90年代中期中央电视台推出《实话实说》之后，许多电视台也纷纷上马新式的谈话节目，令人目不暇接。
中国电视进入了一个众语喧哗的时代。
与红火的新闻传播实践相对应，在新闻传播学科的理论研究中，电视谈话节目研究也一度成为“显学”。
情景喜剧情景喜剧，是一种喜剧演出形式，这种形式一般认为出现在美国广播黄金时代（1920年代至1950年代），如今在世界范围内被广为接受。
在很多国家，情景喜剧都是最受欢迎的电视节目之一。
美国的电视剧分类中，情景喜剧，肥皂剧，和情节系列剧三者都属于“电视连续剧”的范畴；虽然后两者之间常互相渗透，但情景喜剧和后两者之间的区别很大。
除情景喜剧外，其他一些搞笑成分居多的剧集，虽然在内容、表现形式、时间长短上（45分钟左右）和情节系列剧一样，但在参加电视奖项角逐时，通常也会归入喜剧类。
其他国家对情景喜剧和其他电视剧的归属划分和美国并不相同，如中国大陆很多认为情景喜剧属于肥皂剧的范畴。
传统上来讲，情景喜剧的人物一般都是独立的完整体，也就是说角色很大程度上是相对静态的，每一集结尾处此集故事也会解决。
也就是常说的系列剧。
中国第一部情景喜剧是《我爱我家》。
3、电视歌会专指一种综艺节目的形式，前期的策划，明星的参与，受众的配合，后期的包装也制作，溶入时尚性，将歌曲，表演呈现在电视银屏上，每期节目都有鲜明的音乐主题，如同一首歌，欢乐中国行等。
4、广播电视节目的参与性是指在广播电视节目中观众对于节目的录制和内容以及慧英互动的参与状态。
这是在新的电视传播环境下衡量广播电视节目的重要标准，是的电视节目和观众产生互动，良性循环，提升广播电视节目的传播质量。
2009年中传传播学考研试题-传播学理论与历史真题
中国传媒大学考研攻略
中国传媒大学2009年攻读硕士学位研究生入学传播学理论与历史试题
一、名词解释（每题6分，共30分）
1.刻板模式
2.沃尔特·李普曼
3.随机抽样
4.受众商品论
5.符号互动论
二、简答题（每题20分，共40分）
1.试评述“媒介技术论” 。
2.简述媒介专业主义的原则。
三、论述题（第一题20分，后两题每题30分，共80分）
1.胡锦涛总书记到“人民网”视察，结合这一现象解释新媒体对社会的意义。
2.结合今年趋冷的全球经济形势，评述文化依附理论。
3.结合实际谈谈态度劝服理论对大众媒介舆论引导的作用。
2009年全国硕士研究生入学统一考试真题加答案
2009年全国硕士研究生入学统一考试英语试题Section I Use of EnglishDirections:Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1. (10 points)Research on animal intelligence always makes me wonder just how smart humans are.1 the fruit-fly experiments described in Carl Zimmer‘s piece in the Science Times on Tuesday. Fruit flies who were taught to be smarter than the average fruit fly 2 to live shorter lives. This suggests that 3 bulbs burn longer, that there is an 4 in not being too terrifically bright.Intelligence, it 5 out, is a high-priced option. It takes more upkeep, burns more fuel and is slow 6 the starting line because it depends on learning — a gradual 7 — instead of instinct. Plenty of other species are able to learn, and one of the things they‘ve apparently learned is when to 8 .Is there an adaptive value to 9 intelligence? That‘s the question behind this new research. I like it. Instead of casting a wistful glance 10 at all the species we‘ve left in the dust I.Q.-wise, it implicitly asks what the real11 of our own intelligence might be. This is 12 the mind of every animal I‘ve ever met.Research on animal intelligence also makes me wonder what experiments animals would 13 on humans if they had the chance. Every cat with an owner, 14 , is running a small-scale study in operant conditioning. we believe that 15 animals ran the labs, they would test us to 16 the limits of our patience, our faithfulness, our memory for terrain. They would try to decide what intelligence in humans is really 17 , not merely how much of it there is. 18 , they would hope to study a 19 question: Are humans actually aware of the world they live in? 20 the results are inconclusive.1. [A] Suppose [B] Consider [C] Observe [D] Imagine2. [A] tended [B] feared [C] happened [D] threatened3. [A] thinner [B] stabler [C] lighter [D] dimmer4. [A] tendency [B] advantage [C] inclination [D] priority5. [A] insists on [B] sums up [C] turns out [D] puts forward6. [A] off [B] behind [C] over [D] along7. [A] incredible [B] spontaneous [C]inevitable [D] gradual8. [A] fight [B] doubt [C] stop [D] think19. [A] invisible [B] limited [C] indefinite [D] different10. [A] upward [B] forward [C] afterward [D] backward11. [A] features [B] influences [C] results [D] costs12. [A] outside [B] on [C] by [D] across13. [A] deliver [B] carry [C] perform [D] apply14. [A] by chance [B] in contrast [C] as usual [D] for instance15. [A] if [B] unless [C] as [D] lest16. [A] moderate [B] overcome [C] determine [D] reach17. [A] at [B] for [C] after [D] with18. [A] Above all [B] After all [C] However [D] Otherwise19. [A] fundamental [B] comprehensive [C] equivalent [D] hostile20. [A] By accident [B] In time [C] So far [D] Better stillSection II Reading ComprehensionPart ADirections:Read the following four texts. Answer the questions below each text by choosing A, B, C or D. Mark your answers on ANSWER SHEET 1. (40 points)Text1Habits are a funny thing. We reach for them mindlessly, setting our brains on auto-pilot and relaxing into the unconscious comfort of familiar routine. ―Not choice, but habit rules the unreflecting herd,‖ William Wordsworth said in the 19th century. In the ever-changing 21st century, even the word ―habit‖ carries a ne gative connotation.So it seems antithetical to talk about habits in the same context as creativity and innovation. But brain researchers have discovered that when we consciously develop new habits, we create parallel synaptic paths, and even entirely new brain cells, that can jump our trains of thought onto new, innovative tracks.But don‘t bother trying to kill off old habits; once those ruts of procedure are worn into the hippocampus, they‘re there to stay. Instead, the new habits we deliberately ingrain into ourselves create parallel pathways that can bypass those old roads.―The first thing needed for innovation is a fascination with wonder,‖ says Dawna Markova, author of ―The Open Mind‖ and an executive change consultant for Professional Thinking Part ners. ―But we are taught instead to ‗decide,‘ just as our president calls himself ‗the Decider.‘‖ She adds, however, that ―to decide is to kill off all possibilities but one. A good innovational thinker is always exploring the many other possibilities.‖A ll of us work through problems in ways of which we‘re unaware, she says. Researchers in the late 1960 covered that humans are born with the capacity to2approach challenges in four primary ways: analytically, procedurally, relationally (or collaboratively) and innovatively. At puberty, however, the brain shuts down half of that capacity, preserving only those modes of thought that have seemed most valuable during the first decade or so of life.The current emphasis on standardized testing highlights analysis and procedure, meaning that few of us inherently use our innovative and collaborative modes of thought. ―This breaks the major rule in the American belief system — that anyone can do anything,‖ explains M. J. Ryan, author of the 2006 book ―This Year I Will...‖ and Ms. Markova‘s business partner. ―That‘s a lie that we have perpetuated, and it fosters commonness. Knowing what you‘re good at and doing even more of it creates excellence.‖ This is where developing new habits comes in.21. The view of Wordsworth habit is claimed by beingA. casualB. familiarC. mechanicalD. changeable.22. The researchers have discovered that the formation of habit can beA. predictedB. regulatedC. tracedD. guided23.‖ ruts‖(in li ne one, paragraph 3) has closest meaning toA. tracksB. seriesC. characteristicsD. connections24. Ms. Markova‘s comments suggest that the practice of standard testing ? A, prevents new habits form being formedB, no longer emphasizes commonnessC, maintains the inherent American thinking modelD, complies with the American belief system25. Ryan most probably agree thatA. ideas are born of a relaxing mindB. innovativeness could be taughtC. decisiveness derives from fantastic ideasD. curiosity activates creative mindsText 2It is a wise father that knows his own child, but today a man can boost his paternal (fatherly) wisdom –or at least confirm that he‘s the kid‘s dad. All he needs to do is shell our $30 for paternity testing kit (PTK) at his local drugstore – and another $120 to get the results.More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years, according to Doug Fog, chief operating officer of Identigene, which makes the over-the-counter kits. More than two dozen companies sell DNA tests Directly to the public , ranging in price from a few hundred dollars to more than $2500.3Among the most popular : paternity and kinship testing , which adopted children can use to find their biological relatives and latest rage a many passionate genealogists-and supports businesses that offer to search for a family‘s geographic roots .Most tests require collecting cells by webbing saliva in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA.But some observers are skeptical, ―There is a kind of false precision being hawked by people claiming they are doing ancestry testing,‖ says Trey Duster, a New York University sociologist. He notes that each individual has many ancestors-numbering in the hundreds just a few centuries back. Yet most ancestry testing only considers a single lineage, either the Y chromosome inherited through men in a father‘s line or mito chondrial DNA, which a passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other great-grandparents or, four generations back, 14 other great-great-grandparents.Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies don‘t rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may differ depending on the company that processes the results. In addition, the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.26.In paragraphs 1 and 2 , the text shows PTK‘s ___________.[A]easy availability[B]flexibility in pricing[C] successful promotion[D] popularity with households27. PTK is used to __________.[A]locate one‘s b irth place[B]promote genetic research[C] identify parent-child kinship[D] choose children for adoption28. Skeptical observers believe that ancestry testing fails to__________.[A]trace distant ancestors[B] rebuild reliable bloodlines[C] fully use genetic information[D] achieve the claimed accuracy29. In the last paragraph ,a problem commercial genetic testing faces is __________.4[A]disorganized data collection[B] overlapping database building30. An appropriate title for the text is most likely to be__________.[A]Fors and Againsts of DNA testing[B] DNA testing and It‘s problems[C]DNA testing outside the lab[D] lies behind DNA testingText 3The relationship between formal education and economic growth in poor countries is widely misunderstood by economists and politicians alike progress in both area is undoubtedly necessary for the social, political and intellectual development of these and all other societies; however, the conventional view that education should be one of the very highest priorities for promoting rapid economic development in poor countries is wrong. We are fortunate that is it, because new educational systems there and putting enough people through them to improve economic performance would require two or three generations. The findings of a research institution have consistently shown that workers in all countries can be trained on the job to achieve radical higher productivity and, as a result, radically higher standards of living.Ironically, the first evidence for this idea appeared in the United States. Not long ago, with the country entering a recessing and Japan at its pre-bubble peak. The U.S. workforce was derided as poorly educated and one of primary cause of the poor U.S. economic performance. Japan was, and remains, the global leader in automotive-assembly productivity. Yet the research revealed that the U.S. factories of Honda Nissan, and Toyota achieved about 95 percent of the productivity of their Japanese countere pants a result of the training that U.S. workers received on the job.More recently, while examing housing construction, the researchers discovered that illiterate, non-English- speaking Mexican workers in Houston, Texas, consistently met best-practice labor productivity standards despite the complexity of the building industry‘s work.What is the real relationship between education and economic development? We have to suspect that continuing economic growth promotes the development of education even when governments don‘t force it. After all, that‘s how education got started. When our ancestors were hunters and gatherers 10,000 years ago, they didn‘t have time to wonder much about anything besides finding food. Only when humanity began to get its food in a more productive way was there time for other things.As education improved, humanity‘s productivity potential, they could in turn afford more education. This increasingly high level of education is probably a necessary, but not a sufficient, condition for the complex political systems required by advanced5economic performance. Thus poor countries might not be able to escape their poverty traps without political changes that may be possible only with broader formal education. A lack of formal education, however, doesn‘t const rain the ability of the developing world‘s workforce to substantially improve productivity for the forested future. On the contrary, constraints on improving productivity explain why education isn‘t developing more quickly there than it is.31. The author holds in paragraph 1 that the important of education in poor countries ___________.[A] is subject groundless doubts[B] has fallen victim of bias[C] is conventional downgraded[D] has been overestimated32. It is stated in paragraph 1 that construction of a new education system __________.[A]challenges economists and politicians[B]takes efforts of generations[C] demands priority from the government[D] requires sufficient labor force33.A major difference between the Japanese and U.S workforces is that __________.[A] the Japanese workforce is better disciplined[B] the Japanese workforce is more productive[C]the U.S workforce has a better education[D] ]the U.S workforce is more organize34. The author quotes the example of our ancestors to show that education emerged __________.[A] when people had enough time[B] prior to better ways of finding food[C] when people on longer went hung[D] as a result of pressure on government35. According to the last paragraph , development of education __________.[A] results directly from competitive environments[B] does not depend on economic performance[C] follows improved productivity[D] cannot afford political changesText 4The most thoroughly studied in the history of the new world are the ministers and political leaders of seventeenth-century New England. According to the standard history of American philosophy, nowhere else in colonial America was ―So much6important attached to intellectual pursuits ‖ Accord ing to many books and articles, New England‘s leaders established the basic themes and preoccupations of an unfolding, dominant Puritan tradition in American intellectual life.To take this approach to the New Englanders normally mean to start with the Puritans‘ theological innovations and their distinctive ideas about the church-important subjects that we may not neglect. But in keeping with our examination of southern intellectual life, we may consider the original Puritans as carriers of European culture adjusting to New world circumstances. The New England colonies were the scenes of important episodes in the pursuit of widely understood ideals of civility and virtuosity.The early settlers of Massachusetts Bay included men of impressive education and influence in England. `Besides the ninety or so learned ministers who came to Massachusetts church in the decade after 1629,There were political leaders like John Winthrop, an educated gentleman, lawyer, and official of the Crown before he journeyed to Boston. There men wrote and published extensively, reaching both New World and Old World audiences, and giving New England an atmosphere of intellectual earnestness.We should not forget , however, that most New Englanders were less well educated. While few crafts men or farmers, let alone dependents and servants, left literary compositions to be analyzed, The in thinking often had a traditional superstitions quality. A tailor named John Dane, who emigrated in the late 1630s, left an account of his reasons for leaving England that is filled with signs. sexual confusion, economic frustrations , and religious hope-all name together in a decisive moment when he opened the Bible, told his father the first line he saw would settle his fate, and read th e magical words: ―come out from among them, touch no unclean thing , and I will be your God and you shall be my people.‖ One wonders what Dane thought of the careful sermons explaining the Bible that he heard in puritan churched.Mean while , many se ttles had slighter religious commitments than Dane‘s, as one clergyman learned in confronting folk along the coast who mocked that they had not come to the New world for religion . ―Our main end was to catch fish. ‖36. The author notes that in the seventeenth-century New England___________.[A] Puritan tradition dominated political life.[B] intellectual interests were encouraged.[C] Politics benefited much from intellectual endeavors.[D] intellectual pursuits enjoyed a liberal environment.37. It is suggested in paragraph 2 that New Englanders__________.[A] experienced a comparatively peaceful early history.[B] brought with them the culture of the Old World[C] paid little attention to southern intellectual life[D] were obsessed with religious innovations738. The early ministers and political leaders in Massachusetts Bay__________.[A] were famous in the New World for their writings[B] gained increasing importance in religious affairs[C] abandoned high positions before coming to the New World[D] created a new intellectual atmosphere in New England39. The story of John Dane shows that less well-educated New Englanders were often __________.[A] influenced by superstitions[B] troubled with religious beliefs[C] puzzled by church sermons[D] frustrated with family earnings40. The text suggests that early settlers in New England__________.[A] were mostly engaged in political activities[B] were motivated by an illusory prospect[C] came from different backgrounds.[D] left few formal records for later referencePart BDirections:Directions: In the following text, some sentences have been removed. For Questions (41-45), choose the most suitable one from the list A-G to fit into each of the numbered blank. There are two extra choices, which do not fit in any of the gaps. Mark your answers on ANSWER SHEET 1. (10 points)Coinciding with the groundbreaking theory of biological evolution proposed by British naturalist Charles Darwin in the 1860s, British social philosopher Herbert Spencer put forward his own theory of biological and cultural evolution. Spencer argued that all worldly phenomena, including human societies, changed over time, advancing toward perfection. 41.____________.American social scientist Lewis Henry Morgan introduced another theory of cultural evolution in the late 1800s. Morgan, along with Tylor, was one of the founders of modern anthropology. In his work, he attempted to show how all aspects of culture changed together in the evolution of societies.42._____________.In the early 1900s in North America, German-born American anthropologist Franz Boas developed a new theory of culture known as historical particularism. Historical particularism, which emphasized the uniqueness of all cultures, gave new direction to anthropology. 43._____________ .8Boas felt that the culture of any society must be understood as the result of a unique history and not as one of many cultures belonging to a broader evolutionary stage or type of culture. 44._______________.Historical particularism became a dominant approach to the study of culture in American anthropology, largely through the influence of many students of Boas. But a number of anthropologists in the early 1900s also rejected the particularist theory of culture in favor of diffusionism. Some attributed virtually every important cultural achievement to the inventions of a few, especially gifted peoples that, according to diffusionists, then spread to other cultures. 45.________________.Also in the early 1900s, French sociologist Émile Durkheim developed a theory of culture that would greatly influence anthropology. Durkheim proposed that religious beliefs functioned to reinforce social solidarity. An interest in the relationship between the function of society and culture—known as functionalism—became a major theme in European, and especially British, anthropology.[A] Other anthropologists believed that cultural innovations, such as inventions, had a single origin and passed from society to society. This theory was known as diffusionism.[B] In order to study particular cultures as completely as possible, Boas became skilled in linguistics, the study of languages, and in physical anthropology, the study of human biology and anatomy.[C] He argued that human evolution was characterized by a struggle he called the ―survival of the fittest,‖ in which weaker races and societies must eventu ally be replaced by stronger, more advanced races and societies.[D] They also focused on important rituals that appeared to preserve a people‘s social structure, such as initiation ceremonies that formally signify children‘s entrance into adulthood.[E] Thus, in his view, diverse aspects of culture, such as the structure of families, forms of marriage, categories of kinship, ownership of property, forms of government, technology, and systems of food production, all changed as societies evolved.[F]Supporters of the theory viewed as a collection of integrated parts that work together to keep a society functioning.[G] For example, British anthropologists Grafton Elliot Smith and W. J. Perry incorrectly suggested, on the basis of inadequate information, that farming, pottery9making, and metallurgy all originated in ancient Egypt and diffused throughout the world. In fact, all of these cultural developments occurred separately at different times in many parts of the world.Part CDirections:Read the following text carefully and then translate the underlined segments into Chinese. Your translation should be written carefully on ANSWER SHEET 2. (10 points)There is a marked difference between the education which every one gets from living with others, and the deliberate educating of the young. In the former case the education is incidental; it is natural and important, but it is not the express reason of the association.46It may be said that the measure of the worth of any social institution is its effect in enlarging and improving experience; but this effect is not a part of its original motive. Religious associations began, for example, in the desire to secure the favor of overruling powers and to ward off evil influences; family life in the desire to gratify appetites and secure family perpetuity; systematic labor, for the most part, because of enslavement to others, etc. 47Only gradually was the by-product of the institution noted, and only more gradually still was this effect considered as a directive factor in the conduct of the institution. Even today, in our industrial life, apart from certain values of industriousness and thrift, the intellectual and emotional reaction of the forms of human association under which the world's work is carried on receives little attention as compared with physical output.But in dealing with the young, the fact of association itself as an immediate human fact, gains in importance.48 While it is easy to ignore in our contact with them the effect of our acts upon their disposition, it is not so easy as in dealing with adults. The need of training is too evident; the pressure to accomplish a change in their attitude and habits is too urgent to leave these consequences wholly out of account. 49Since our chief business with them is to enable them to share in a common life we cannot help considering whether or no we are forming the powers which will secure this ability.If humanity has made some headway in realizing that the ultimate value of every institution is its distinctively human effect we may well believe that this lesson has been learned largely through dealings with the young.50 We are thus led to distinguish, within the broad educational process which we have been so far considering, a more formal kind of education -- that of direct tuition or schooling. In undeveloped social groups, we find very little formal teaching and training. These groups mainly rely for instilling needed dispositions into the young upon the same sort of association which keeps the adults loyal to their group.Section & Writing10Part A51. Directions:Restrictions on the use of plastic bags have not been so successful in some regions. ―White pollution ‖is still going on. Write a letter to the editor(s) of your local newspaper to1)give your opinions briefly and2)make two or three suggestionsYou should write about 100 words. Do not sign your own name at the end of the letter. Use "Li Ming" instead. You do not need to write the address.Part B52. Directions:In your essay, you should1) describe the drawing briefly,2) explain its intended meaning, and then3) give your comments.You should write neatly on ANSHWER SHEET 2. (20 points)11。
武汉科技大学09年电路考研真题
二O O九年招收硕士研究生入学考试试题考试科目及代码：电路817适用专业：控制理论与控制工程、检测技术与自动化装置、模式识别与智能系统、电路与系统可使用的常用工具：计算器、绘图工具答题内容写在答题纸上，写在试卷或草稿纸上一律无效考完后试题随答题纸交回。
考试时间3小时，总分值150分。
2009年电路考研试题参考答案和评分标准一、计算题(15分)解：利用结点电压法求解 选定参考结点，结点电压方程为121131181(1)0.5211(1)0.522n n n n n U U U I U U I ⎧⎪=⎪⎪+-=⎨⎪⎪+-=-⎪⎩ 又 13n I U = 联立解得： 236V,2V n n U U ==212315A,4V 2n n n I U I U U U ∴=+==-=二、计算题(15分) 解：根据叠加定理求解12S S I k I k U =+1212101,25 4.5k k k k ∴+=-= 可求得 122,0.1k k ==-故当 15 V, 2.5 A S S U I ==时，2 2.50.115 3.5A I =⨯-⨯= 三、计算题(15分)解：根据戴维南定理求解求解 S1：先求断开后的开路电压 S2：再求短路后的短路电流S3：则有等效电阻1OC eq SCUR I ==Ω15L eq R R ∴==Ω时可获得最大功率 且 2max4W 4OC eqU P R == (4分) 四、计算题(15分) 解：利用三要素法求解 S1：先求初始值 (0)2Vu += 因 (0)(0)0L L i i +-==S2：后求稳态值 ()3Vu ∞= 因 ()0.5AL i ∞=S3：再求时间常数/1/4eq L R s τ==4()()[(0)()]34Vttu tu u u e e τ--+∴=∞+-∞=-五、计算题(15分)解：利用相量法结合相量图求解2100A,I =∠︒ 则1090V,U =∠-︒ 11090A,I =∠-︒ 110245A I I I =+=∠-︒ 102451090525245V SU j LI U L ωωϕ∴=+=⋅∠︒+∠-︒=∠=∠-︒相量图 (3分)六、计算题(15分)解：先去耦等效再利用相量法求解 去耦等效电路图结点电压方程为 11110001000()101010101010101010a U j j j j j ∠︒∠︒++=++-+++ 100245V aU∴=∠-︒ 1211001005245A,52135A 10101010a a U U I I I j j --==∠︒==-=∠-︒++ 七、计算题(15分)解：利用谐波分析法和相量法求解 '"S S Su u u =+S1：先求'36V S u = 单独作用(0)(0)366A,=366=216W //I P R R R==-⨯-+S2：后求"S u t ω=单独作用设640V SU =∠︒ ,求出右边三条并联支路的等效复导纳 /eq Y I U =1444444R L C U U U I I I I Uj j =++=++=+- 1/4eq Y s ∴= (1)(1)6480A,=cos0=512W 41/44S S eq U I P U I Y ===∠︒-︒-++ 故有()62c o s Ai t tω=+10A I == 01728WP P P =+=-（）（） 八、计算题(15分)解：利用复频域分析法求解, 先画出运算模型图如下22446()(1)1(1)1C s U s s s +=-++++1()[()]4cos 6sin V t t C C u t L U s e t e t ---==- 九、计算题(15分)解：利用相量法结合对称三相电路的特点求解**1Re[]30]cos(30)AC A A A A A P U I I I ϕ==∠-︒=-︒**2Re[]30]cos(30)BC B B B B B P U I I I ϕ==∠-︒=+︒ 又 100V,A B P A B P U U U I I I =====1cos(30)P P I ϕ-︒=200c o s (30)503P P I ϕ+︒=30,5A P I ϕ∴=︒= 20PPU Z I ==Ω 又 30Z ϕϕ==︒ 故 2030Z =∠︒Ω 十、计算题(15分)解：利用双口网络参数方程和相量法求解11111221293U z I z I I I =+=+ 2211222135U z I z I I I =+=+ 又 2122240,2,4LL U U U j I I I =∠︒==--1124093(1)2L I j I ∴∠︒=-+ 11235(1)2L L j I I j I =-+ 解得45A LI =-︒。
2009年考研计算机统考真题及答案解析
12. 一个 C 语言程序在一台 32 位机器上运行。 程序中定义了三个变量 x、 y 和 z， 其中 x 和 z 为 int 型， y 为 short 型。当 x=127，y =- 9 时，执行赋值语句 z=x+y 后， x、y 和 z 的值分别是 A ． x=0000007FH，y=FFF9H， z=00000076H B． x=0000007FH，y=FFF9H， z=FFFF0076H C． x=0000007FH，y=FFF7H， z=FFFF0076H D． x=0000007FH，y=FFF7H， z=00000076H 13. 浮点数加、减运算过程一般包括对阶、尾数运算、规格化、舍入和判溢出等步骤。设浮点数的阶码和尾数 均采用补码表示，且位数分别为 5 位和 7 位（均含 2 位符号位）。若有两个数 X=27 ×29/ 32 ， Y=25 ×5/8 ，则 用浮点加法计算 X+Y 的最终结果是 A ．00111 1100010 C． 01000 0010001 。
40. FTP 客户和服务器间传递 FTP 命令时，使用的连接是______ 。 A ．建立在 TCP 之上的控制连接 C．建立在 UDP 之上的控制连接 二、综合应用题：第 41~47 题，共 70 分。 41. （10 分）带权图（权值非负，表示边连接的两顶点间的距离）的最短路径问题是找出从初始顶点到目标顶 点之间的一条最短路径。假设从初始顶点到目标顶点之间存在路径，现有一种解决该问题的方法：
28. 下列文件物理结构中，适合随机访问且易于文件扩展的是______ 。 A ．连续结构 C．链式结构且磁盘块定长 B．索引结构 D．链式结构且磁盘块变长
29. 假设磁头当前位于第 105 道，正在向磁道序号增加的方向移动。现有一个磁道访问请求序列为 35，45，12 ， 68 ，110 ，180， 170， 195 ，采用 SCA N 调度 (电梯调度) 算法得到的磁道访问序列是 ______ 。 A ．110,170,180,195,68,45,35,12 C．110,170,180,195,12,35,45,68 B．110,68,45,35,12,170,180,195 D． 12,35,45,68,110下列二叉排序树中，满足平衡二叉树定义的是______ 。
十四套名校数电考研真题、答案与详解
十四套名校数电考研真题、答案与详解网学天地（）出品版权所有！目 录1华中科技大学2008年《电子技术基础》考研真题与答案 (1)2电子科技大学2010年《数字电路》考研真题与答案 (6)3浙江大学2011年《信号系统与数字电路》考研真题与答案 (14)4吉林大学2010年《电子技术》考研真题与答案 (20)5南开大学2011年《电子综合基础》考研真题与答案 (23)6华南理工大学2011年《电子技术基础》考研试题 (27)7哈尔滨工业大学2010年《电子技术基础》考研真题与答案 (33)8哈尔滨工业大学2010年《电路与数字电子技术》考研真题与答案 (39)9哈尔滨工业大学2010年《信号与系统、数字电路》考研真题与答案 (40)10复旦大学2009年《电子线路与集成电路设计》考研真题与答案 (48)11东南大学2008年《信号与系统、数字电路》考研真题与答案 (52)12深圳大学2011年《数字电路与专业综合》考研真题与答案 (60)13重庆大学2010年《电子技术一》考研真题与答案 (67)14北京邮电大学2009年《电子电路》考研真题与答案 (71)网学天地（ ）出品 版权所有！ 11 华中科技大学2008年《电子技术基础》考研真题与答案数字电子技术部分一、填空题（每空1分，共20分）4．数字电路中的三极管一般工作于________区和________区。
答案：截止 饱和5．(63)O 的二进制补码是________，格雷码是________。
答案：(101100)B (101010)B6．四个逻辑变量的最小项最多有________个，任意两个最小项之积为________。
答案：16 07．触发器是对脉冲________敏感的存储单元电路，锁存器是对脉冲________敏感的存储电源电路。
答案：边沿 电平8．对于一个含有逻辑变量A 的逻辑表达式L ，当其他变量用0或1代入后，表达式可化简为：L =________或________时，会产生竞争冒险。
中传通信考研复试数字电路06年真题答案
中传通信考研复试数字电路06年真题答案
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中传通信考研复试数字电路06年真题答案
注：此套真题答案为本人花大量时间独立完成，其间翻阅教材、上网查询、纸上演算，然后编辑进电脑。
我力求为广大中传通信的考生提供一份准确无误、注解详细、具有参考价值的真题答案，但毕竟限于笔者水平有限，编辑之时也难免遗漏，文中出现的谬误之处还望大家原谅，也欢迎大家的指正批评！
本人也是过来人，我依稀记得去年自己准备和参加复试时的情景，也是出于当时自己复试之时的迷茫才突然有了做这一份真题答案的冲动。
我能体会大家此时的心情，也希望这份答案可以帮助你们更加迅速地掌握复试笔试中的知识要点。
祝你考研成功！
另外，请大家尊重笔者的劳动成果，谢绝转载。
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