西南科技大学流体力学2019年考博初试真题
博士生入学流体力学资料-整理后
三、充满油的油缸内有一自由活塞向下运动，油通过间隙 向上流动，由于
d
1 ，
又很大，这就成为一个阻尼器，且流动是层流。如果活塞以等速 V0
运
动，忽略端部效应。如果已知活塞高度 l ，直径 d ，流体粘度 ，流体密度 ，
上端面压强 p2 ，下端面压强 p1 ，间隙 ，活塞速度 V0 ，求作用于活塞上的力 （除油压 p1 和 p2 以外的力）。
w a b( y ) c( y )2 ，（其中a,b,c为待定常数），试求：（20分） （1）平板层流附面层的速度分布；
w
（2）附面层的厚度 及动量损失厚度 ； （3）平板壁面上的局部摩擦系数和总摩擦系数。 2
博士学位研究生入学考试试题（2006-A）
一、是非题（共 10 题，每题 4 分）
w a b( y ) c( y )2 ，（其中a,b,c为待定常数），试求：（20分）
w
（1）平板层流附面层的速度分布；
（2）附面层的厚度 及动量损失厚度 2 ；
（3）平板壁面上的局部摩擦系数和总摩擦系数。
五、在 (a,0) 与 (a,0) 分别放置一个汇和一个源，其强度均为 Qs ，且有一自左向右的均匀来流，速度为V ，平行于 x 轴，求叠加后的势函数、流函数与驻点坐标。（20分）
r (a,
b,
c,
t
)
，再由此求加速度的拉格朗日描述；
（3）流线及迹线。
二、密度为 的两股不同速度的不可压缩流体合流，通过一段平直圆管，混合后速度与压力都均匀，如图所示。若两
股来流面积均为 A ，压力相同，一股流速为V ，另一股流速为 2V ，假定管壁摩擦力不计，流动定常绝热。证明单位 2
西南科技大学838流体力学2011-2012、16-19年考研专业课真题试卷
2012年西南科技大学考研专业课真题试卷（原版）
2012年西南科技大学考研专业课真题试卷（原版）
2012年西南科技大学考研专业课真题试卷（原版）
精都教育——全国 100000 考生的选择
我们的梦想，为成就更多人的梦想
西 南 科 技 大 学 研 究 生 入 学 考 试 试 题
原版考研真题试卷
更多考研真题、笔记、模拟、题库、讲义资料就上精都考研网 /
原版考研真题试卷
更多考研真题、笔记、模拟、题库、讲义资料就上精都考研网 /
2016年西南科技大学考研专业课真题试卷（原版）
2016年西南科技大学考研专业课真题试卷（原版）
2016年西南科技大学考研专业课真题试卷（原版）
精都教育——全国 100000 考生的选择
我们的梦想，为成就更多人的梦想
西 南 科 技 大 学 研 究 生 入 学 考 试 试 题
原版考研真题试卷
更多考研真题、笔记、模拟、题库、讲义资料就上精都考研网 /
2012年西南科技大学考研专业课真题试卷（原版）
2012年西南科技大学考研专业课真题试卷（原版）
2012年西南科技大学考研专业课真题试卷（原版）
2012年西南科技大学考研专业课真题试卷（原版）
2012年西南科技大学考研专业课真题试卷（原版）
2012年西南科技大学考研专业课真题试卷（原版）
精都教育——全国 100000 考生的选择
我们的梦想，为成就更多人的梦想
西 南 科 技 大 学 研 究 生 入 学 考 试 试 题
原版考研真题试卷
更多考研真题、笔记、模拟、题库、讲义资料就上精都考研网 /
2018年西南科技大学考研专业课真题试卷（原版）
2018年西南科技大学考研专业课真题试卷（原版）
中科大流体力学试卷及答案
流体力学基础期末考试试卷姓名＿＿___＿＿___ 学号___＿__＿__＿ 班级________＿＿ 得分__＿__＿____一、简答题(30分）1. 什么是粘性?气体与液体的粘性随温度变化趋势有什么不同？为什么？答:相邻两层流体做相对运动时存在内摩擦作用,称为粘性力。
粘性是流体抵抗剪切变形能力的一种量度。
液体间粘性力主要由分子内聚力形成,气体间粘性力主要由分子动量交换形成的,所以导致气体与液体粘性随温度变化趋势不同，具体表现为：液体粘性随温度升高而降低(温度升高,分子间距增大,内聚力降低),气体粘性随温度升高而升高（温度升高,分子运动加剧,动量交换加剧）。
2. 简述单位与量纲的联系与区别，简述Re, Ｆｒ的物理意义答:单位是某一物理参数的量度，包含了物理量的物理特性与尺度。
量纲表示物理量的物理特性。
R ｅ是惯性力与粘性力的比较，Fr 是惯性力与重力的比较。
3. 什么是边界层厚度，位移厚度及动量厚度?答:边界层厚度是速度等于外流速度的99%时的厚度；位移厚度--将由于不滑移条件造成的质量亏损折算成无粘性流体的流量相应的厚度，又称为质量亏损厚度;动量厚度-－将由于不滑移条件造成的动量流量亏损折算成无粘性流体的动量流量相应的厚度。
4. 什么是流线,迹线及烟线?答:流线:流场中的一条曲线,曲线上各点的速度矢量方向和曲线在该点的切线方向相同。
迹线：流体质点在空间运动时描绘出来的曲线。
烟线:从流场中的一个固定点向流场中连续地注入与流体密度相同的染色液,该染色液形成一条纤细色线,称为脉线。
或另定义如下,把相继经过流场同一空间点的流体质点在某瞬时连接起来得到的一条线。
5. 简述层流与湍流的区别答:层流：是流体的一种流动状态。
当流速很小时,流体分层流动，互不混合，其流动行为可以预测。
湍流：是流体的一种流动状态。
流体运动具有随机性,强混合性与有旋性,其流动行为不可预测,本质上是三维，非定常的。
二、运算题1. (1５分）拉格朗日变数 (ａ, b, c ） 给出的流体运动规律为：2222)1(,)1(,--+=+==t ce z t b y ae x t t1）求以欧拉方法描述的速度 ２）流动是否定常？ 3）求加速度答：1）设速度场三个分量为 ｕ，v,w消去拉氏变数: 222, , 11y ztu x v w tt=-==++22t x u ae t -∂==-∂22(1)2(1)1y b t v b t t t ∂+==+=∂+222232(1)2[(1)(1)]1t t z ce t t w ce t t t t ---∂+==+-+=∂+2）欧拉表达式中包括变量t , 是不定常流动。
流体力学与液压传
西南科技大学试题单考试科目流体力学与液压传课程代码命题人张俊俊、朱建公学院制造学院专业机200101–200110 学号共2页第 1图1 图2图3 图4图5南科技大学试题单答案考试科目流体力学与液压传课程代码命题人张俊俊、朱建公学院制造学院专业机200101–200110 学号共2页第 1 页一问答题：1、液压元件使用灵活方便、体积小重量轻、反应速度快、操纵方便可实现无级调速、能自动实现过载保护、易实现自动控制。
缺点是：不能得到严格的传动比、效率低、故障不易查找。
2、雷诺数Re=ϖd/ς作用：判断液体流动的状态，当雷诺数小于临界雷诺数为层流当雷诺数大于临界雷诺数为紊流3液体在单位速度梯度下流动时，液层间单位面积上产生的内摩擦力。
4、换向阀阀芯的工作位置数叫位，换向阀与系统相连的油口数叫通。
5、沿程压力损失和局部压力损失。
沿程压力损失受液体的粘性、管长、管径、流速等的影响。
局部压力损失受截面形状变化、弯管接头、阀口、流速等的影响。
6、不考虑泄露的情况下，泵每转一弧度所能排出液体的体积。
容积效率＝实际流量与理论流量的比。
7、滑阀在中位时各油口的连接方式称中位机能。
例O型中位机能在：各油口关闭，系统保压、缸锁紧。
8、以下4部分组成动力元件：把机械能转化成液压能。
执行元件：把液压能转化成机械能。
控制元件实现对执行元件印度速度、方向、作用力等的控制。
辅助元件：保证系统正常工作。
二、1、泵的工作压力P=02、能实现3级调压, 各溢流阀的调整压力应满足Py1> Py2 >Py33、压油管: 速度V1=952*0.2/302=2m/s雷诺数Re=2*30*10-3/0.3*10-4=2000<2320 为层流λ=64/ Re=0.032压力损失ΔP1 =(0.032*30/0.03+0.5+0.29)900*22/2+0.2=0.059MPa 回油管: 速度V2=902*0.2/302=1.8m/s雷诺数Re=1.8*30*10-3/0.3*10-4=1800<2320 为层流λ=64/ Re=0.032压力损失ΔP2 =(0.032*32/0.03+0.1+0.29+0.29)900*1.82/2+0.1=0.05MPa泵的出口压力P =(ΔP2*π902/4)/ π952/4+F/π952/4+ΔP1=1.533 MPa4、（1）P=2000/100+3=23Kgf/cm2 (2)速度变快（3）不变三、1YA 2YA 3YA 4YA快进＋———工进＋—＋—快退—＋——停止、卸荷———＋特点：先导型溢流阀卸荷回路卸荷压力小冲击小，回油节流调速回路速度平稳性好发热、泄漏节流调速影响小，用三位四通电磁换向阀易实现自动控制。
√2019年《流体力学与流体机械》试卷(含答案)
《流体力学与流体机械》试卷1一、单项选择（40题，每题1分，计40分）1.与牛顿内摩擦定律有关的因素是（）A.压强、速度和粘度；B.流体的粘度、切应力与角变形率；C.切应力、温度、粘度和速度；D.压强、粘度和角变形。
2.流体是一种（）物质。
A.不断膨胀直到充满容器的；B.实际上是不可压缩的；C.不能承受剪切力的；D.在任一剪切力的作用下不能保持静止的。
3.动力粘性系数M与运动粘性系数v的关系为（）。
A. P vB. v / pC. v /pD. p v4.串联管道各串联管段的（）A.水头损失相等；B.总能量损失相等；C.水力坡度相等；D.所通过的流量相等。
5.长管并联管道各并联管段的（）A.水头损失相等；B.总能量损失相等；C.水力坡度相等；D.通过的水量相等；6.按连续介质的概念，流体质点是指（）。
A.流体的分子B.流体内的固体颗粒C.无大小的几何点D.几何尺寸同流动空间相比是极小量，乂含有大量分子的微元体7. 一下哪种流体为非牛顿流体（）。
A.空气B.清水C.血液D.酒精8.绝对压强P而、相对压强P、真空值Pv、当地大气压强Pa之间的关系是（）。
A.Pabs=P+ Pv B- P= Pabs + Pa C.Pv=P a- P abs9.一密闭容器内下部为密度为夕的水，上部为空气，空气的压强为四。
若容器由静止状态自由下落，则在下落过程中容器内水深为h处的压强为（）：A. “° + pghB. PoC. 0D. p° - pgh10.定常流动是（）A.流动随时间按一定规律变化：B.流场中任意空间点的运动要素不随时间变化：C.各过流断面的速度分布相同；D.各过流断面的压强相同。
11.圆管层流过流断面的流速分布为（）。
A.均匀分布B.对数曲线分布C.二次抛物线分12、一下那些概念属于欧拉法（）。
A.流线B.迹线C.液体质点D.液体微13.圆管紊流粗糙区的沿程摩阻系数（）。
A.与雷诺数Re有关B.与管壁相对粗糙度上有关 dC.与Re和二有关D.与和管长1有关 d14.圆管断面直径由di突然扩大到d2,若将一次扩大改为两级扩大，则该扩大的局部水头损失（）。
西南科技大学《热工基础及流体力学》期末考试复习
热工基础及流体力学第一章 气体的热力性质（名词解释）1.工质：实现能量传递与转换的媒介物质 。
2.热力学系统：热力学研究时，根据研究问题的需要人为选取一定的工质或空间作为研究对象，称为热力系统，简称热力系或系统。
3. 热力系分类：①封闭热力系（与外界有能量传递,无物质交换的系统。
系统的质量恒定不变）②开口热力系：（与外界有能量、物质交换的系统，系统的质量可变）③绝热热力系（与外界没有热量交换的系统）④孤立热力系：（与外界既无能量（功、热量）交换又无物质交换的系统）4. 热力状态：工质在某一瞬间所呈现的全部宏观物理特性，称为热力学状态，简称状态。
5. 状态参数：描述工质热力状态的宏观的物理量叫做热力学状态参数，简称状态参数。
基本状态参数：温度（T ）、压力（p ）、比体积（v ）导出状态参数：热力学能（U ）、焓（H ）、熵（S ）6. 理想气体：是指状态变化完全遵循波义耳-分子间的作用力都可以忽略不计的气体，的、不占体积的质点，分子之间没有相互作用力。
7.热力学能：指组成物质的微观粒子本身所具有的能量, 即所谓的热能。
包括了：①内动能:分子热运动的动能。
②内位能: 分子之间由于相互作用力而具有的位能。
第二章 热力学基本定律（填空+计算（卡洛循环）+名词解释）1.准平衡过程：过程中热力系所经历的每一个状态都无限地接近平衡状态的热力过程称为 准平衡过程，或准静态过程 。
2. 可逆过程：如果热力系完成某一热力过程后, 再沿原来路径逆向进行时 , 能使热力系和外界都返回原来状态而不留下任何变化，则这一过程称为 可逆过程。
反之,则称为不可逆过程 。
(可逆过程是一个理想过程，可逆过程的条件：可逆过程= 准平衡过程 ＋ 无耗散效应）。
3. 关系：准平衡过程概念只包括热力系内部的状态变化，而可逆过程则是分析热力系与外界所产生的总效果。
可逆过程必然是准平衡过程，而准平衡过程只是可逆过程的条件之一。
4. 热力学第一定律：实质就是热力过程中的能量守恒定律。
2019年西南大学博士研究生入学考试《英语》试题及答案详解
西南大学博士研究生入学考试《英语》试题及答案详解Part Two: Structure and Written Expression20Directions: In each question decide which of four choices given will most suitably complete the sentence if inserted at the place marked. Mark your choices on the ANSWERSHEET.21.The nuclear family __________ a self-contained, self-satisfying unit composed of father, mother and children.A. refers toB. definesC. describesD. devotes to22.Some polls show that roughly two-thirds of the general public believe that elderly Americans are________ by social isolation and loneliness.A. reproachedB. favoredC. plaguedD. reprehended23.In addition to bettering group and individual performance, cooperation ________ the quality of interpersonal relationship.A. ascendsB. compelsC. enhancesD. prefers24.In the past 50 years, there ________ a great increase in the amount of research _____on the human brain.A. was…didB. has been…to be doneC. was…doingD. has been…done25.“I must have eaten something wrong. I feel like _____ .”“We told you not to eat at a restaurant. You’d better _______ at home when you are not in the shape.”A. to throw up…to eatB. throwing up…eatingC. to throw up…eatD. throwing up…eat26. Parent shave to show due concerns to their children’s creativity and emotional output; otherwise what they think beneficial to the kids might probably _______ their enthusiasm and aspirations.A. hold backB. hold toC. hold downD. hold over27. According to psychoanalysis, a person’s attention is attracted ________ by the intensity of different signals ________ by their context, significance, and information content.A. not less than…asB. as…just asC. so much…asD. not so much…as28.They moved to Portland in1998 and lived in a big house, _______ to the south.A. the windows of which openedB. the windows of it openedC. its windows openedD. the windows of which opening29.The lady who has_______ for a night in the dead of the winter later turned out to be a distant relation of his.A. put him upB. put him outC. put him onD. put him in30.By standers,_______,_________ as they walked past lines of ambulances.A. bloody and covered with dust, looking dazedB. bloodied and covered with dust, looked dazedC. bloody and covered with dust, looked dazedD. bloodied and covered with dust, looking dazed31. Hong Kong was not a target for terror attacks, the Government insistedyesterday, as the US________ closed for an apparent security review.A. ConsulationB. ConstitutionC. ConsulateD. Consular32. American fans have selected Yao in a vote for the All-Star game ______the legendary O’Neal,who ______ the “Great Wall”at the weekend as the Rockets beat the Los Angeles Lakers.-A. in head of, ran onB. in head of, ran intoC. ahead of, ran ontoD. ahead of, ran into33. Professional archivists and librarians have the resources to duplicate materials in other formats and the expertise to retrieve materials trapped in _________ computers.A. abstractB. obsoleteC. obstinateD. obese34. She always prints important documents and stores a backup set at her house. “I actually think there’s something about the______ of paper that feels more comforting.” She said.A. tangibilityB. tanglednessC. tangentD. tantalization35.“They said what we always knew,”said an administration source,___________.A. he asked not to be namedB. who asked not to be namedC. who asked not be namedD. who asked not named36.In Germany, the industrial giants Daimler Chrysler and Siemens recently_______ their unions into signing contracts that lengthen work hours without increasing pay.A. muscledB. movedC. mushedD. muted37. He argues that the policy has done little to ease joblessness, and has left the country_______.A. energizedB. EnervatedC. NervedD. enacted38. The more people hear his demented rants, the more they see that he is a terrorist_______.A. who is pure and simpleB. being pure and simpleC. pure and simpleD. as pure and simple39. This expansion of rights has led to both a paralysis of the public service and to a rapid and terrible ________ in the character of the population.A. determinationB. deteriorationC. desolationD. desperation40._______ a declining birthrate, there will be an over-supply of 27,000 primary school places by 2010, _______ leaving 35 school sidle.B. Coupling with, equivalent toC. Coupled with, equivalent toD. Coupling with, equals toPart Three: Reading Comprehension 10Passage One The HeroMy mother’s parents came from Hungary, but my grandfather could trace his origin to Germany and also he was educated in Germany. Although he was able to hold a conversation in nine languages, he was most comfortable in German. Every morning, before going to his office, he read the German language newspaper, which was American owned and published in New York.My grandfather was the only one in his family to come to the United States with his wife and children. He still had relatives living in Europe. When the first world war broke out, he lamented the fact that if my uncle, his only son had to go, it would be cousin fighting against cousin. In the early days of the war, my grandmother begged him to stop taking the German newspaper and to take an English language newspaper, instead. He scoffed at the idea, explaining that the fact it was in German did not make it a German newspaper, but only an American newspaper, printed in German. But my grandmother insisted, for fear that the neighbors may see him read it and think he was German. So, he finally gave up the German newspaper.One day, the inevitable happened and my uncle Milton received notice to join the army. My grandparents were very upset, but my mother, his little sister, was excited. Now she could boast about her soldier brother going off to war. She was ten years old at the time, and my uncle, realizing how he was regarded by his little sister and her friends, went out and bought them all service pins, which meant that they had a loved one in the service. All the little girls were delighted. When the day came for him to leave, his whole regiment, in their uniforms, left together from the same train station. There was a band playing and my mother and her friends came to see him off. Each one wore her service pin and waved a small American flag, cheering the boys, as they left.The moment came and the soldiers, all very young, none of whom had hadany training, but who had never the less all been issued uniforms, boarded the train. The band played and the crowd cheered. The train groaned as if it knew the destiny to which it was taking its passengers, but it soon began to move. Still cheering and waving their flags, the band still playing, the train slowly departed the station.It had gone about a thousand yards when it suddenly ground to a halt. The band stopped playing, the crowd stopped cheering. Everyone gazed in wonder as the train slowly backed up and returned to the station. It seemed an eternity until the doors opened and the men started to file out. Someone shouted, “It’s the armistice. The war is over.” For a moment, nobody moved, but then the people heard someone bark orders at the soldiers. The men lined up and formed into two lines. They walked down the steps and, with the band playing behind, paraded down the street, as returning heroes, to be welcomed home by the assembled crowd. The next day my uncle returned to his job, and my grandfather resumed reading the German newspaper, which he read until the day he died.41. Where was the narrator’s family when this story took place?A. In Germany.B. In Hungary.C. In the United StatesD. In New York.42.His grandfather ____________.A. could not speak and read English well enoughB. knew nine languages equally wellC. knew a number of languages, but felt more kin to GermanD. loved German best because it made him think of home43. His grandmother did not want her husband to buy and read newspapers in German, because ________.A. it was war time and Germans were their enemyB. the neighbors would mistake them as pro-GermanC. it was easier to get newspapers in English in AmericaD. nobody else read newspapers in German during the wartime44. The narrator’s mother wanted her brother to go to fight in the war, because________.A. like everybody else at the wartime, she was very patrioticB. she hated the war and the Germans very muchC. all her friends had relatives in war and she wanted to be like themD. she liked to have a brother she could think of as a heroPassage TwoWaking Up from the American DreamsThere has been much talk recently about the phenomenon of “Wal-Martizatio n”of America, which refers to the attempt of America’s giant Wal-Mart chain store company to keep its cost at rock-bottom levels. For years, many American companies have embraced Wal-Mart-like stratagems to control labor costs, such as hiring temps (temporary workers) and part-timers, fighting unions, dismantling internal career ladders and outsourcing to lower paying contractors at home and abroad.While these tactics have the admirable outcome of holding down consumerprices, they’re costly in other ways. More than a quarter of the labor force, about 34 million workers, is trapped in low-wage, often dead-end jobs. Many middle-income and high-skilled employees face fewer opportunities, too, as companies shift work to subcontract or sand temps agencies and move white-collar jobs to China and India.The result has been an erosion of one of America’s most cherished value: giving its people the ability to move up the economic ladder over their life times. Historically, most Americans, even low-skilled ones, were able to find poorly paid janitorial or factory jobs, then gradually climbed into the middleclass as they gained experience and moved up the wage curve. But the number of workers progressing upward began to slip in 1970s. Upward mobility diminished even more in the 1980s as globalization and technology slammed blue-collar wages.Restoring American mobility is less a question of knowing what to do than of making it happen. Experts have decried schools’in adequacy for years, but fixing them is a long, arduous struggle. Similarly, there have been plenty of warnings about declining college access, but finding funds was difficult even in eras of large surpluses.45. The American dream in this passage mainly refers to____________.A. there are always possibilities offered to people to develop themselves in the societyB. Americans can always move up the pay ladderC. American young people can have access to college, even they are poorD. the labor force is not trapped in low-wage and dead-end jobs46. Wal-Mart strategy, according to this passage, is to___________.A. hire temps and part-timers to reduce its costB. outsource its contracts to lower price agencies at home and abroadC. hold down its consumer price by controlling its labor costsD. dismantle the career ladder and stop people’s mobility upward47. Which of the following statements is NOTTRUE?A. Wal-Martization has been successful in keeping costs at rock-bottom levels.B. Upward mobility for low-skilled workers has become impossible in the U.S.C. More business opportunities are given to low-cost agencies in China and India.D. Although people know how to restore American mobility, it’s difficult to change the present situation.Passage Three Seniors and the CityTens of thousands of retirees are pulling up stakes in suburban areas and fashioningtheir own retirement communities in the heart of the bustling city. They are looking for what most older people want: a home with no stairs and low crime rates. And they are willing to exchange regular weekly golf time for rich cultural offerings, young neighbors and plenty of good restaurants. Spying an opportunity, major real-estate developer shavebroken ground on urban sites they intended to market to suburban retirees. These seniors are already changing the face of big cities. One developer, Fran Mc Carthy asks: “Who ever thought that suburban flight would be roundtrip?”The trickle of older folks returning to the city has grown into a steady stream. While some cities, especially those with few cultural offerings, have seen an exodus of seniors, urban planners say others have become retirees magnets. Between 1999 and 2000, the population of 64-to-75-year-olds in downtown Chicago rose 17 percent. Austin, New Orleans, and Los Angeles have seen double-digit increases as well. There may be hidden health benefits to city living. A study reveals that moving from suburbs to the city can ward off the byproduct of aging--- social isolation. In the next six years, downtowns are expected to grow even grayer. For affluent retirees, city life is an increasingly popular option.48. Retired seniors are moving back into the city because____________.A. they find there are too many crimes in the suburbsB. unlike the flats in the city, their country house have stairs to climbC. they are no longer interested in playing golfD. in the city, they have more social and cultural life against loneliness49. From the passage we can infer that_________.A. the real-estate developers have broken their original contracts of construction with senior retireesB. a life in the downtown city is expensive, and most of those retirees who moved back into the city are very well-offC. with more older people living in the city, the city will become gray and less beautifulD. very soon the American suburban areas will face their low population crisis50. Fran Mc Carthy’s question means: nobody ever thought that__________.A. people who moved out of the city decades ago now would move backB. suburban dwellers when moving back into the city must take roundtripC. suburban flight years ago would go in circlesD. senior people’s moving back into the city would take place all over the United StatesDirections: Read the following passage carefully and then explain in your own English the exact meaning of the numbered and underlined parts. Put your answers on ANSWERSHEET(2)15(51) Being angry increases the risk of injury, especially among men, new research says.There searchers gathered data on more than 2,400 accident victims at three Missouri hospitals. They interviewed each subject to determine the patient’s emotional state just before the injury and 24 hours earlier, gathering data on whether the patients felt irritable, angry or hostile, and to what degree. Then they compared the results with a control groupof uninjured people.(52)Despite widespread belief in “road rage,”anger did not correlate with injuries from traffic accidents.(53)Not surprisingly, anger was strongly associated with injuries inflicted deliberately. But other injuries–those neither intentionally inflicted nor from falls or traffic accidents–also showed strong associations with anger.(54)The correlations were significantly weaker for women than for men, but there were no differences by race. The authors acknowledge that their data depend on self-reports, which are not always reliable.(55)Why anger correlates with injury is not known. “I can speculate that the anger may have prompted some behavior that led to the injury, or may have simply distracted the person, leading indirectly to the injury,”said the study’s lead author.Part Four: Cloze Test10Directions: Read the following passage carefully and then fill in each numbered blank with ONE suitable word to complete the passage. Put your answers on ANSWERSHEET (2).Last year French drivers killed(56)_______ than 5,000 people on the roads for the first time in decades. Credit goes largely(57)________ the 1,000 automated radar cameras planted on the nation’s high ways since 2003, which experts reckon(58)_______ 3,000 lives last year. Success, of course breeds success: the government plans to install500(59)______radar devices this year.So it goes with surveillance these days. Europeans used to look at the security cameras posted in British cities, subways and buses(60)_______ the seeds of an Orwellian world that was largely unacceptable in Continental Europe. But last year’s London bombing, in which video cameras(61)________a key role in identifying the perpetrators, have helped spuraseachange. A month(62)_______ the London attacks, half of Germans supported EU-wide plans to require Internet providers and telecoms to store all e-mail, Internet and phone data for “anti-terror”(63)______.In a British poll, 73 percent of respondents said they were(64)_______ to give up some civil liberty to improve(65)________.Part Five: Proof reading 10Directions: In the following passage, there are altogether 10 mistakes, ONE in each numbered and underlined part. You may have to change a word, add a word, or just delete a word. If you change a word, cross it with a slash(/) and write the correct word beside it. If you add a word, write the missing word between the words (in brackets) immediately before and after it. If you delete a word, cross it out with a slash(/). Put your answer on ANSWERSHEET(2).Examples:eg.1(66)The meeting begun 2 hours ago.Correction put on the ANSWERSHEET(2):(66) begunbeganeg.2(67) Scarcely they settled themselves in their seats in the theatre when the curtain went up.Correction put on the ANSWERSHEET(2):(67)(Scarcely) had (they)eg.3(68)Never will I not do it again.Correction put on the ANSWERSHEET(2):(68)not(66)Application files are piled highly this month in colleges across the country.(67) Admissions officers are poring essays and recommendation letters, scouring transcripts and standardized test scores.(68)But anything is missing from many applications: a class ranking, oncea major component in admissions decisions.In the cat-and-mouse maneuvering over admission to prestigious colleges and universities, (69) thousands of high schools have simply stopped providing that information, concluding it could harm the chances of their very better, but not best, students.(70)Canny college officials,in turn, have found a tactical way to response.(71) Using broad data that high schools often provide, like a distribution of grade averages for entire senior class, they essentially recreate an applicant’s class rank.(72)The process has left them exasperating.(73)“If we’re looking at your son or daughter and you want us to know that they are among the best in their school, with a rank we don’t necessarily know that,”said Jim Bock, dean of admissions and financialaid at Swarthmore College.(74)Admissions directors say strategy can backfire.When high schools do not provide enough general information to recreate the class rank calculation, (75) many admissions directors say they have little choice and to do something virtually no one wants them to do: give more weight to scores on the SAT and other standardized exams.Part Six: Writing15Directions: Write a short composition of about 250 to 300 words on the topic given below. Write it neatly on ANSWERSHEET(2).Recently, a newspaper carried an article entitled: “We Should No Longer Force Gong Li and Zhang Yimou to Take Part in National Politics”. The article argued that some artists and film stars are unwilling or unqualified to represent the people in the People’s Congress or the People’s Political Consultative Conference, and they should not be forced to do so. What do you think?56. fewer 57. to 58. saved 59. more 60. as 61. played 62. after 63. purposes 64. ready/ willing 65. security北京大学2006年博士入学考试试题答案Listening0.5each)1-5 BCAAD 6-10 BADCA11-15 CBADA 16-20 BDCBＣC1:immune C11:insufficientC2:range C12:accidentsC3:quarter C13:wheelC4:uninterrupted C14:shiftC5:tossing C15:riskC6:destined C16:deterioratesC7:claim C17:snatchC8:fooling C18:skepticalC9:deprivation C19:substituteC10:correlation C20:insomnia Structureandwrittenexpression1pointeach)21-25accdd 26-30adaab 31-35cdbab 36-40abcbcReading1pointeach)41-45ccbda 46-50cbdbaParaphrasing:(3pointseach)51.According to new research, getting angry adds to the chances of getting physically hurt, particularly for male.52.even people generally believe that people easily get angry when driving on the road, but anger didn’t have much/anything to do with injuries from traffic accidents,/ but not many injuries from traffic accidents are the results of anger on the road.53.It is not at all surprising that anger is a very important reason for people who intentionally hurt themselves.54.We see this strong link between anger and injury more in men than in women, but different races of people did not show much variation.55. People do not know yet why anger is associated with injury. Cloze:(1pointeach)56.Fewer57.To 58.Saved 59.More 60.As 61.Played 62.After63.Purposes 64.Ready 65.SecurityProofreading:(1pointeach)66.Highly-high67.Pore-poreover68.Anything-something69.Better-good70.Response-respond71.Forentire-foranentire72.Exasperating-exasperatedbS73.With-without 74.Strategy-thestrategy 75.And-butWriting:(15points)。