文档库 最新最全的文档下载
当前位置:文档库 › 重庆大学英语分级考试题

重庆大学英语分级考试题

09级《大学英语》分级考试试卷A(普本).

命题部门:外国语学院试卷序号:A考试形式:闭卷学分: 考生校区:浦口考生班级:考生学号:考生姓名: 考试班级:09级普本(英语专业除外) 南京审计学院 2009级《大学英语》分级考试注意事项 1.本次考试答题纸分两部分:答题卡(供阅卷机使用)和答题纸。 2.客观题(Part I–Part III)做在答题卡上,主观题(Part IV–Part VI)做在答题纸上。 3.划线要求: (1)用HB—2B铅笔按照答题卡上的范例填写。 (2)要有一定粗度,浓度盖过字母底色 (3)代号划写不能用钢笔或圆珠笔,否则试卷作废。 (4)修改要用橡皮擦干净,注意不要划错行。 4.答题卡上的学校代号和准考证号填写学生学号。不足十位数的请在学号前面加0,补足十位数。请在相应数字上划线。 5.答题卡上的试卷代号一定要划,否则阅卷机无法识别。 注意: 不按要求填涂答题卡而造成阅卷机无法识别,得不到成绩,由本人负责。 外国语学院大学外语教学部 2009年8月

2009级《大学英语》分级考试试卷 Part I.Reading Comprehension(40%) Directions:Read the following passages and choose the best answer to each of the questions or incomplete statements following the passage.You must read the four choices marked A,B,C and D,and decide which is the best answer.Then mark the corresponding letter on the Answer Sheet with a single line through the center. (2’×20) Passage1 Questions1to5are based on the following passage. It has been a widespread belief that the American family is dying.But a new study reveals that the American family is stronger than ever.This study affords surprising evidence of the persistence of American commitments to family life. The American family is changing,not dying.It is becoming smaller,men and women are becoming more equal,and the divorce rate is higher.But despite the high divorce rate,marriage has never been more popular.The majority of divorced people remarry,but only2%marry more than twice.Most marriages last a long time,and a large proportion of divorces are from teenage marriages.Depending on the specific situation,there’s often good reason for teenage marriages to break up. There is no evidence that children receive less attention from mothers who work outside the home than from mothers working inside the home.So far the amount of educational or development time hasn’t varied very much,whether or not the mother works outside the home.In fact,working mothers try to make up for it by setting aside time only for their children. The study shows that television is by far the most significant new childcare arrangement of this century.The most important activity for children up to age14is watching television. School is the second most time-consuming activity for children.They spend an average of about19hours a week in school.A larger proportion of children go to school earlier than ever before,and they stay in school longer.Another big change is that the proportion of very young children in daycare centers(日托站)has almost doubled in recent https://www.wendangku.net/doc/9011084787.html,pared with these two dramatic changes in child activity,the changes caused by mothers working outside the home appear very small. 1The main idea of this article is that_______. A.the American family is dying B.young people today don’t want to get married C.the American family is changing,but it is stronger than ever https://www.wendangku.net/doc/9011084787.html,cation has resulted in dramatic changes in the American family 2Which of the following statements is NOT true? A.Marriage is more popular than before. B.Many divorced people remarry. C.The majority of marriages last long. D.Working mothers devote less time to their children.

重庆大学多媒体技术期末考试

重庆大学 多媒体技术 课程试卷 juan A卷 B卷 2007 ~2008 学年 第 一 学期 开课学院: 计算机学院 课程号: 16005225 考试日期: 考试方式: 开卷闭卷 其他 考试时间: 120 分 (请将答案写在答题纸上,答在试卷上不给分) 一、 单项选择题(2分/每小题,共30分) 1. 下列那种类型图像不适合于采用调色板位置码组织编排像素( ) a .windows 位图 b .PhotoShop 索引图像 c .8色图像 d .真实彩色图像 2. 下列哪个是传输媒体( ) a .ASC 码 b .汉字机内码 c . 同轴电缆 d .内存储器 3. 下列数字音频播放时间相同,问哪种音频格式所占存储空间最小( ) a .MP3 b .MIDI 音频 c .CD 音频 d .GoldWav e 编辑处理过的音频 4. 下列哪种采样频率属于FM 音质采样频率( ) a .16k b .22.05k c . 44.1k d .24k 5. 下列软件中,哪个软件不具有视频编辑功能( ) a .Movie Maker b .Ulead Media Studio Pro c .Premiere Pro d .PhotoShop 6.下列说法不正确的是( ) a .MMX 的含义是多媒体扩展。 b .支持MCI 接口的设备为MCI 设备,声卡为一个物理设备,因此,它肯定也只能是一个MCI 设备。 c .DirectX 可提供快速图形显示驱动。 d .DirectX 也可驱动声卡。 7.对JPEG ,下面描述不正确的是( ) a .JPEG 是一个组织。 b .JPEG 图像是基于JPEG 组织制作的JPEG 标准的一种图像格式。 c .JPEG 压缩算法采用基于内容的压缩方式。 d .JPEG 压缩算法压缩效率高。 8.对MPEG ,下面描述不正确的是( ) a .MPEG 是一个组织。 b .MPEG-1压缩算法为VCD 的所采用的压缩算法。 c .在MPEG 视频压缩技术中,P 帧图像误差不会传播。 d .以上描述至少有一个错误。 9.与磁盘相比,下列哪个不是只读光盘的优点( ) a .搜寻定位快 b .存储容量大 c .光驱具有更多的用途 d .以上都不是 10.下面关于多媒体数据管理的描述不正确的是( ) a .多媒体数据数据量大,不同媒体之间差异也极大。 b .多媒体系统中的数据不仅仅是字符、实数、整数等类型数据。 c .多媒体数据管理改变了传统数据库的接口,也改变了传统数据库的操作形式。 d .以上描述至少有一个错误。 11.下面关于超文本的描述不正确的是( ) a .超文本中的链是从一个结点指向另一个结点的指针。 b .超文本是由信息结点和表示信息结点间相关性的链构成的一个具有一定逻辑结 构和语义的网络。 c .万维网中的超链接是超文本链的一种,属于基本结构链。 d .以上描述至少有一个错误。 12.下列那个软件不是创作工具( ) a .Movie Maker b .Authorware c .Director d .以上都是 13.下列描述不正确的是( ) a .JavaScript 是一种区分大小写的语言。 b .JavaScript 程序运行需要IIS 支持。 c .new 语句是一种对象构造器,可以用new 语句来定义一个新对象。 d .以上描述至少有一个错误。 14.下列描述不正确的是( ) a .VBScript 只有一种数据类型,称为 Variant 。 b .Flash 软件中的补间动画是一种通过创建起始帧和结束帧,由系统自动设置中间帧的动画方式。 c .可在定义控件的标记中添加较短的内部代码向事件附加 VBScript 代码。 d .以上描述至少有一个错误。 15.下列描述不正确的是( ) a .网页设计中,常利用表格、单元格将网页中的元素排列整齐。 b .Flash 软件中的元件是在 Flash 中创建的图形、按钮或影片剪辑。元件只需创建一次,然后即可在整个文档或其他文档中重复使用。 c .Flash 软件中建立运动引导层有多种方法,一种是选择“插入”>“时间轴”>“运动引导层”,在当前层上新建一个运动引导层。 d .以上描述至少有一个错误。 命 题人: 组题人: 审题人: 命题时间: 教务处制 学院 专业、班 年级 学号 姓名 公平竞争、诚实守信、严肃考纪、拒绝作弊 封 线 密

全国英语等级考试一级模拟试题

全国英语等级考试(一级)模拟试题 听力(略)第一部分 英语知识运用第二部分 单项填空第一节 并在阅读下面的句子和对话,从三个选项中选出一个能填入空白处的最佳选项,答题卡将该项涂黑。26. He is badly ill. We must _____ a doctor at once. C. send away B. send for A. send to . last year27. The hospital _______ C. has been built B. was built A. built into the classroom, the teacher _____something on the blackboard. came28. When I C. wrote A. is writing B. was writing 29. --How long have you been ill? -- C. Once a week A. Since last week B. A week ago 30. Everybody is here _____Mike. C. except B. and A .not understand the passage ___ there are a few new words in it. 31. We don'tC. because B. unless A. and 32. The TV set is very nice. How long have you _______it? C. taken B. had A. bought 33. --- Shall I get one more apple for you, Dad? ve had enough. '---Thanks, but you _______. It C. needn' A. may not B. must not 34. --- _________is your shirt? --- It is 100yuan. C. How long B. How much A. How many 35. He is _______kind an old man that all the children like him. C. such B. so A. very this 36. Either Jim or Sam ______going to help the farmers with the orange harvest afternoon. C. is B. were A. was . 37. We have studied for two hours. Let's stop A. have a rest B. to have a rest C. having a rest 38. We won't go to Great Wall if it ________tomorrow.

重庆大学操作系统全英文期末考试题(带答案)

XX大学2011 ——2012 学年第一学期 《操作系统》期末考试试题(A) 考 试 注 意 事 项 考试时间年月日考试 课程 题号一二三四五六七八总分满分 得分 阅卷 教师 一. 二.选择题(20分,每题1分) 1. Generally speaking, which one is not the major concern for a operating system in the following four options?( D ) A.Manage the computer B.Manage the system resources C.Design and apply the interface between user's program and computer hardware system D.High-level programming language complier 2.The main disadvantage of batch system is ( C ) A.CPU utilization is low B.Can not concurrent https://www.wendangku.net/doc/9011084787.html,ck of interaction

D.Low degree of automation

3.A process transforms from waiting state to ready state is caused by the ( B ) A.Interrupt event B.Process scheduling C.Create a process for a program D.Waiting for some events 4.The concurrent process is refers to ( C ) A.The process can be run in parallel B.The process can be run in order C.The process can be run in the same time D.The process can not be interrupted 5.In multi-process system, in order to ensure the integrity of public variables, the processes should be mutually exclusive access to critical areas. The so-called critical area is ( D ) A.A buffer B.A date area C.Synchronization mechanism D.A program 6.The orderly use of resources allocation strategy can destroy the conditio n ( D ) to avoid deadlock. A.Mutual exclusive B.Hold and wait C.No preemption D.Circular wait https://www.wendangku.net/doc/9011084787.html,er's applications use the system resources to complete its operation by the support and services of ( C ) A.clicking the mouse B.Keyboard command C.System call D.Graphical user interface 8.There are four jobs arrived at the same time and the execution time of each job is 2h. Now they run on one processor at single channel,then the average turnaround time is ( B ) A.1h B.5h C.2.5h D.8h 9.Among the job scheduling algorithms, ( B ) is related to the job's estimated running time. A.FCFS scheduling algorithm

全国英语等级考试二级模拟试题

全国英语等级考试二级模拟试题(二) 第一部分听力理解(略) 第二部分英语知识运用 第一节单项填空 1.He is ______ a writer. A. failure as B. a failure as C. the failure for D. a failure with 2.– can you come on Monday or Tuesday? – I'm afraid ______ day is possible. A. either B. neither C. any D. some 3.Dr. Black comes from either Oxford or Cambridge. I can't remember ______. A. where B. there C. which D. what 4.In the centuries _____, Egypt became one of the most advanced civilizations on earth. A. followed B. tat was followed C. which was following D. which followed 5.To enter his house is like ______ a small museum. A. to enter B. entering C. entered D. enter 6.The local government cut down their costs ______ 30 percent. A. at B. by C. for D. with 7.I'm reading his ______ novel. A. best-selling B. best-sold C. best-sale D. best-sell 8.It's rude of you to shout _______ the room. A. beyond B. through C. across D. over 9.People are more likely to stay _______ 30 miles of _______ they were born. A. in … where B. at … what C. within … what D. within … where 10.After searching for half an hour, she realized that her glasses ______ on the table all the time. A. were lain B. had been lain C. have been lying D. had been lying 11.Facts show that as many as 50 percent of patients do not take drugs ______ directed. A . like B. as C. which D. so 12.I walked too much yesterday and ______ are still aching now. A. my leg muscles B. my muscles of leg C. my leg's muscles D. my muscles of the leg 13.He will have ______ 30 by the end of this year. A. turned B. become C. got D. taken 14.Macao ______ its return to China in December, 1999. A. watched B. found C. saw D. noticed 15.This hotel _______ $60 for a single room with bath. A. charges B. demands C. prices D. claims 第二节完形填空 My father waved me goodbye and the bus (16)_____. My first country journey then began. The man sitting next to me was a road engineer. He said that (17)_____ by bus was an excellent way to (18)_____ road for him. We passed many villages on the way and stopped once (19)_____ to buy cold drinks, (20)_____ it was very hot. The countryside was brown and dry and there were long (21)_____ with no people or villages in (22)_____. We also stopped once at

级《大学英语》分级测验考试试卷A普本

命题人:大学外语教学部 复核人: 命题部门:外国语学院试卷序号: A 考试形式:闭卷学分: 考生校区:浦口考生班级:考生学号:考生姓名: 考试班级:09级普本(英语专业除外) 南京审计学院 2009级《大学英语》分级考试注意事项 1.本次考试答题纸分两部分:答题卡(供阅卷机使用)和答题纸。 2.客观题(Part I – Part III)做在答题卡上,主观题(Part IV – Part VI)做在答题纸上。 3.划线要求: (1) 用HB—2B铅笔按照答题卡上的范例填写。 (2) 要有一定粗度,浓度盖过字母底色 (3) 代号划写不能用钢笔或圆珠笔,否则试卷作废。 (4) 修改要用橡皮擦干净,注意不要划错行。 4.答题卡上的学校代号和准考证号填写学生学号。不足十位数的请在学号前面加0,补足十位数。请在相应数字上划线。 5.答题卡上的试卷代号一定要划,否则阅卷机无法识别。 注意: 不按要求填涂答题卡而造成阅卷机无法识别,得不到成绩,由本人负责。 外国语学院大学外语教学部 2009年8月

2009级《大学英语》分级考试试卷 Part I. Reading Comprehension (40%) Directions:Read the following passages and choose the best answer to each of the questions or incomplete statements following the passage. You must read the four choices marked A, B, C and D, and decide which is the best answer. Then mark the corresponding letter on the Answer Sheet with a single line through the center. (2’×20) Passage 1 Questions 1 to 5 are based on the following passage. It has been a widespread belief that the American family is dying. But a new study reveals that the American family is stronger than ever. This study affords surprising evidence of the persistence of American commitments to family life. The American family is changing, not dying. It is becoming smaller, men and women are becoming more equal, and the divorce rate is higher. But despite the high divorce rate, marriage has never been more popular. The majority of divorced people remarry, but only 2% marry more than twice. Most marriages last a long time, and a large proportion of divorces are from teenage marriages. Depending on the specific situation, there’s often good reason for teenage marriages to break up. There is no evidence that children receive less attention from mothers who work outside the home than from mothers working inside the home. So far the amount of educational or development time hasn’t varied very much, whether or not the mother works outside the home. In fact, working mothers try to make up for it by setting aside time only for their children. The study shows that television is by far the most significant new childcare arrangement of this century. The most important activity for children up to age 14 is watching television. School is the second most time-consuming activity for children. They spend an average of about 19 hours a week in school. A larger proportion of children go to school earlier than ever before, and they stay in school longer. Another big change is that the proportion of very young children in daycare centers (日托站) has almost doubled in recent years. Compared with these two dramatic changes in child activity, the changes caused by mothers working outside the home appear very small. 1 The main idea of this article is that _______. A. the American family is dying B. young people today don’t want to get married C. the American family is changing, but it is stronger than ever D. education has resulted in dramatic changes in the American family 2 Which of the following statements is NOT true? A. Marriage is more popular than before. B. Many divorced people remarry. C. The majority of marriages last long. D. Working mothers devote less time to their children.

复旦大学本科生新生大学英语分级考试大纲及相关说明

复旦大学本科生新生大学英语分级考试大纲 一、基本要求 为了帮助学生在大学阶段更好地学习英语,因材施教,所有进入复旦大学的新生(英语系、翻译系除外)都须参加大学英语分级考试。进校时已获得托福成绩90分或雅思成绩6.5分以上的学生可免试(须于分级考试前向大学英语教学部文科大楼525办公室提供成绩单原件及复印件)。 参加本次考试的学生应掌握领会式词汇3000。阅读速度达到90wpm (words per minute),准确率为75%。能听懂语速120wpm的一般性会话和短文。语法与中学英语教学大纲所规定的要求相同。 我们将根据分级考试的成绩,安排学生分别进入大学英语(预备级)、大学英语I、大学英语II、大学英语III 、大学英语IV和高级英语课程学习。 大学英语I学习目标:经过一个学期的学习,掌握新词1200,使累计领会式词汇达到4200,其中复用式词汇2500单词。具体标准: 读:阅读速度达到100wpm,准确率为75%。完成总阅读量5万。 听:能听懂语速130wpm的一般性会话、报道和讲座。 说:能就一主题或图片或所学课文内容进行连续3分钟左右的陈述。 写:能在30分钟就各种题材写出150词的短文,内容完整,语法正确,条理清晰,句子连贯。 译:翻译具有一定难度的英语文章段落,速度每小时300词;翻译题材熟悉的汉语文章段落,速度为每小时250个汉字。 大学英语I I学习目标:新增词汇1200,累计领会式词汇达到5400,其中复用式3200单词。具体标准为: 读:阅读速度达到120wpm,准确率为75%。完成总阅读量6万。 听:能听懂语速150wpm的一般性会话、报道和讲座。 说:能就一主题或图片进行连续5分钟左右的陈述。 写:能在30分钟就各种题材写出180词的短文,内容完整,语法正确,条理清晰,句子连贯。 译:翻译具有一定难度的英语文章段落,速度每小时350词;翻译题材熟悉的汉语文章段落,速度为每小时300个汉字。

重庆大学《复变函数与积分变换》期末考试试卷及答案

得分 得分 ?复变函数与积分变换?期末试题(A ) 一.填空题(每小题3分,共计15分) 1. 2 3 1i -的幅角是( );2.)1(i Ln +-的主值是 ( );3. 2 11)(z z f +=,=)0() 5(f ( ); 4.0=z 是 4 sin z z z -的( )极点;5. z z f 1 )(=,=∞]),([Re z f s ( ) ; 二.选择题(每小题3分,共计15分) 1.解析函数),(),()(y x iv y x u z f +=的导函数为( ); (A ) y x iu u z f +=')(; (B )y x iu u z f -=')(; (C ) y x iv u z f +=')(; (D )x y iv u z f +=')(. 2.C 是正向圆周3=z ,如果函数=)(z f ( ),则0d )(=?C z z f . (A ) 23-z ; (B )2 )1(3--z z ; (C )2)2()1(3--z z ; (D )2)2(3-z . 3.如果级数∑∞ =1 n n n z c 在 2=z 点收敛,则级数在 (A )2-=z 点条件收敛 ; (B )i z 2=点绝对收敛; (C )i z +=1点绝对收敛; (D )i z 21+=点一定发散. 4.下列结论正确的是( ) (A )如果函数)(z f 在0z 点可导,则)(z f 在0z 点一定解析;

(B) 如果)(z f 在C 所围成的区域内解析,则0)(=? C dz z f (C )如果 0)(=? C dz z f ,则函数)(z f 在C 所围成的区域内一定解析; (D )函数 ),(),()(y x iv y x u z f +=在区域内解析的充分必要条件是 ),(y x u 、),(y x v 在该区域内均为调和函数. 5.下列结论不正确的是( ). (A) 的可去奇点;为z 1 sin ∞(B) 的本性奇点;为z sin ∞ (C) ;1sin 1 的孤立奇点为 z ∞(D) .sin 1的孤立奇点为z ∞ 三.按要求完成下列各题(每小题10分,共计40分) (1)设)()(2 2 2 2 y dxy cx i by axy x z f +++++=是解析函数,求.,,,d c b a (2).计算? -C z z z z e d ) 1(2 其中C 是正向圆周:2=z ; 得分

全国英语等级考试(一级)模拟试题

全国英语等级考试(一级)模拟试题 第一部分听力(略) 第二部分英语知识运用 第一节单项填空 阅读下面的句子和对话,从三个选项中选出一个能填入空白处的最佳选项,并在答题卡将该项涂黑。 26. He is badly ill. We must _____ a doctor at once. A. send to B. send for C. send away 27. The hospital _______ last year. A. built B. was built C. has been built 28. When I came into the classroom, the teacher _____something on the blackboard. A. is writing B. was writing C. wrote 29. --How long have you been ill? -- A. Since last week B. A week ago C. Once a week 30. Everybody is here _____Mike. A .not B. and C. except 31. We don’t understand the passage ___ there are a few new words in it. A. and B. unless C. because 32. The TV set is very nice. How long have you _______it? A. bought B. had C. taken 33. --- Shall I get one more apple for you, Dad? ---Thanks, but you _______. I’ve had enough. A. may not B. must not C. needn’t 34. --- _________is your shirt? --- It is 100yuan. A. How many B. How much C. How long 35. He is _______kind an old man that all the children like him. A. very B. so C. such 36. Either Jim or Sam ______going to help the farmers with the orange harvest this afternoon. A. was B. were C. is 37. We have studied for two hours. Let’s stop . A. have a rest B. to have a rest C. having a rest 38. We won’t go to Great Wall if it ________tomorrow. A. rains B. rain C. will rain 39. No book and no pen______in the bag. A. is B. are C. has 40. Please give me ______. A. two cups of milks B. two cup of milk C. two cups of milk 第二节完形填空 阅读下面短文,从短文后所给的三个选项中选出能填入相应空白处的最佳选

大学英语等级考试

大学英语等级考试 目录[隐藏] 简介 大学英语等级考试的作用和影响 大学英语等级考试(CET4、6)的措施 大学英语四、六级考试(CET4、6)报名 时区划分 简介 大学英语等级考试的作用和影响 大学英语等级考试(CET4、6)的措施 大学英语四、六级考试(CET4、6)报名 时区划分 四级考试大纲 [编辑本段] 简介 大学英语等级考试是教育部主管的一项全国性的教学考试,其目的是对大学生的实际英语能力进行客观、准确的测量,为大学英语教学提供服务。大学英语考试是一项大规模标准化考试,在设计上必须满足教育测量理论对大规模标准化考试的质量要求,是一个“标准关联的常模参照测验”。 大学英语四、六级考试作为一项全国性的教学考试由“国家教育部高教司”主办,分为四级考试(CET-4) 和六级考试(CET-6),每年各举行两次。从2005年1月起,报道成绩满分为710分,凡考试成绩在425分以上的考生,由国家教育部高教司委托“全国大学英语四六级考试委员会”发给成绩单。 由国家教育部任命成立"全国大学英语四、六级考试委员会"(目前为第三届),考试委员会由全国若干重点大学的有关教授和专家组成,设顾问二人,主任委员一

人,副主任委员若干人,专业委员会委员和咨询委员会委员各若干人。全国大学英语四、六级考试委员会在学术上、组织上对大学英语考试负责。部分考务工作由"教育部考试中心"负责。 考试委员会设办公室作为常设办事机构(办公地址设在上海交通大学校内)[编辑本段] 大学英语等级考试的作用和影响 1.大学英语四、六级考试已引起全国各高等院校及有关教育领导部门对大学英语教学的重视,调动了师生的积极性。效度研究的大量统计数据和实验材料证明大学英语四、六级考试不但信度高,而且效度高,符合大规模标准化考试的质量要求,能够按教学大纲的要求反映我国大学生的英语水平,因此有力地推动了大学英语教学大纲的贯彻实 六级考试大纲 施,促进了我国大学英语教学水平的提高。 2.大学英语考试每年为我国大学生的英语水平提供客观的描述。由于大学英语四、六级考试广泛采用现代教育统计方法,分数经过等值处理,因此保持历年考试的分数意义不变。 3.由于大学英语四、六级考试采用正态分制,使每次考试后所公布的成绩含有大量信息,成为各级教育行政部门进行决策的动态依据,也为各校根据本校实际情况采取措施提高教学质量提供了反馈信息。 4.大学英语四、六级考试从命题、审题、考务组织、统计分析到成绩发布已形成一套完整的制度,是一项组织得较好的、严格按照标准化考试质量要求进行的大规模考试。 5.大学英语考试已经得到社会的承认,目前已经成为各级人事部门录用大学毕业生的标准之一,产生了一定的社会效益。 [编辑本段] 大学英语等级考试(CET4、6)的措施 大学英语四、六级考试经历了一个不断完善的过程。为提高考试的效度和信度,近年来采取了一系列的改革措施。例如:

重庆大学《数值分析》期末考试真题及答案

一.填空题: 1. 若求积公式对任意不超过 m 次的多项式精确成立,而对 m+1 次多项 式不成立,则称此公式的代数精度为m 次. 2. 高斯消元法求解线性方程组的的过程中若主元素为零会发生 计算中 断 ;. 主元素的绝对值太小会发生 误差增大 . 3. ) 4. 当A 具有对角线优势且 不可约 时,线性方程组Ax=b 用简单迭代法和塞德 尔迭代法均收敛. 5. 求解常微分方程初值问题的欧拉方法是 1 阶格式; 标准龙格库塔法是 4 阶格式. 6. 一个n 阶牛顿-柯特斯公式至少有 n 次代数精度,当n 偶数时,此公式可 以有 n+1 次代数精度. 、 7. 相近数 相减会扩大相对误差,有效数字越多,相对误差 越大 . 二计算题: 1. 线性方程组: ??? ??-=++-=+-=++5 .1526235.333321 321321x x x x x x x x x 1) ¥ 2) 对系数阵作LU 分解,写出L 阵和U 阵; ???? ? ? ?-=????? ? ?--=79/123/54 1 33 14 /33/113 /11U L 3) 求出此方程组的解. )5.0,1,2('-=x 2. 线性方程组: — ??? ??=++-=++=++3 32212325223321 321321x x x x x x x x x 1)对系数阵作LU 分解,写出L 阵和U 阵;

?? ??? ? ?=?? ?? ? ??=573235223 152321321//////U L 2)求出此方程组的解. ),,(' -=133x 4) # 5) 此方程组能否用用简单迭代法和高斯塞德尔迭代法求解. 073 2 2 232223053 2 2 3 03>=>=>,, A 对称正定,用高斯-塞德尔迭代法收敛; . .,., //////)(,6667033331027 16 3432323232323232131 =-==+-=-?? ?? ? ?? -=+-=-λλλλλJ J B I U L D B 用简单迭代法不收敛 > 3. 设f (x )= x 4, 以-1,0,1,2为插值节点, 1) 试写出f (x )的三次拉格朗日插值多项式P 3(x )及其插值余项R 3(x ); 6 ) 2)(1())()(())()(()(3020103210--- =------= x x x x x x x x x x x x x x x x l

相关文档
相关文档 最新文档