桂林理工大学876自动控制原理2020年考研真题
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2020年广西桂林理工大学化工原理考研真题A卷一、单项选择题(每题1分,共30题,总共30分)1.当离心泵输送液体密度增加时,离心泵的也增大。
A. 流量B.轴功率C. 扬程D. 效率2.热量传递的基本方式是____ ____。
A. 恒温传热和稳态变温传热B. 导热给热和热交换C. 气化、冷凝与冷却D. 传导传热、对流传热与辐射传热3.一不饱和的空气其________温度最低。
A.干球温度B.绝热饱和温度C.露点温度D. 湿球温度4.一转子流量计,当流量为50m3/h时,测定流量计转子上下压差为250Pa,现流量变为150m3/h,则流量计转子上下压差为 Pa。
A. 250B. 500C. 750D. 1505.流体在管道内作连续流动,在不同截面上,保持不变的物理量是________。
A. 温度B. 动能C. 机械能D.质量流量6.某塔高30m,进行水压试验时,离塔底l0m高处的压力表的读数为500kPa,(塔外大气压强为100kPa)。
那么塔顶处水的压强应为________。
A. 403.8kPaB. 698.1kPaC. 600kPaD.无法确定7.单级单吸式离心清水泵,系列代号为________。
A. ISB. DC. ShD. S8.孔板流量计是。
A. 变压差流量计,垂直安装B. 变截面流量计,垂直安装C. 变压差流量计,水平安装D. 变截面流量计,水平安装9.下列属于离心泵的不正常操作。
A. 改变离心泵转速B.改变离心泵叶轮的弯度C. 未灌满待输送液体运转D.关闭离心泵出口阀10.当热导率为常数时,单层平壁内的温度分布是分布的。
A.直线B.曲线C.折线D.不确定11.精馏过程是一个过程。
A.传热过程B. 传热和传质同时进行的化学过程B.传质过程 D. 传热和传质同时进行的物理过程12.下列进料不影响理论塔板数。
A.位置B.进料状态C. 组成D.总量13.精馏塔生产中,若操作回流比小于 R min,则。
2020年广西桂林理工大学社会学综合考研真题A卷考生注意:请将答题写在答卷纸上,写在试卷上视为无效。
一、名词解释(每小题5分,共40分)
1.参与观察
2.印象管理
3.区群谬误
4.自然社区
5.整群抽样
6.先赋角色
7.社会互动
8.社会保险
二、简答题(每小题10分,共40分)
1.请简述人的社会化的含义及其内容。
2.请简述社会的构成要素。
3.请简述问卷设计的基本原则。
4.请简述马斯洛的需要层次理论。
三、辨析题(每小题15分,共30分)
1.初级社会群体和次级社会群体的区别。
2.主文化、亚文化、反文化的区别。
四、论述题(每小题20分,共40分)
1.举例说明戈夫曼的“自我呈现”(Presentation of self),并对戈夫曼“拟剧论”的核心观点做出评价。
2.有学者认为“全世界的家庭结构正在朝核心家庭的方向发展”,试从社会变迁的角度论述这种趋势出现的原因,并结合中国的国情加以分析。
2020年广西桂林理工大学结构力学考研真题A卷
考生注意:
1
.请将答题写在答卷纸上,写在试卷上视为无效。
2.考试需带三角板或直尺、普通计算器。
一、简答题(共20分)
1.对图1-1、1-2中的杆件系统进行几何组成分析,并写出正确的结果(如果有多余约束,要写出具体的多余约束数量)。
(2分共8分)
图1-2
2.如图1-3所示,判断平面桁架在图示荷载作用下,哪些是零杆,写出来;并计算1、2杆的轴力。
(12分)
图1-3
图1-1
图
4
图 2
二、画出图2梁中
、
、
、剪力
的影响线。
(4
分共16分)
三、不需要写出详细求解过程,作图3结构的弯矩图、剪力图和轴力图。
(共20分)
图 3
四、求出图4梁结构处的竖向位移和处的转角,已知杆件为常数。
(24分)
五、利用对称性简化图5结构,并用力法计算,画出结构的弯矩图。
各杆件的为同一常数。
(25分)
图5
六、用位移法计算图6中刚架,并绘制弯矩图,各杆件的常数。
(20分)
图6
七、已知等截面连续梁各段相对线刚度如图7所示,用力矩分配法计算并绘制其弯矩图。
(注:三个轮次即可,并保留小数点后两位有效数字)(25分)
图7。
2020年 《金属学原理》 第1页 共2页 桂林理工大学2020年硕士研究生入学考试试题
考试科目代码:857
考试科目名称:金属学原理【A 】
(总分150分,三小时答完) 考生注意:1.请将答题写在答卷纸上,写在试卷上视为无效。
2.考试需带 无存储功能的科学计算器、三角板、2B 铅笔、橡皮 用具
一、 名词解释(每小题5分,共30分)
1. 动态再结晶
2. 晶胞
3. 间隙固溶体
4. 点缺陷
5. 固溶强化
6. 弹性模量
二、综合题(每小题15分,共120分)
1. 金属银单晶是面心立方结构,请说明该结构的配位数、每个晶胞内的原子数以及堆积致密度,并说明该结构每个晶胞中包含多少个四面体间隙,多少个八面体间隙?
2. 画一个立方体,设为立方晶系晶胞,设定坐标轴,然后在其中画出(101)、(112)晶面,以及[011]、[110]晶向并进行标注。
3. 判断下面的位错反应是否能够进行,写出详细的计算判定过程。
]110[2
]211[6]112[6a a a →+
4. 请根据所示Ag-Cu 二元合金相图,写出该相图中三相恒温转变线(以英文字母符号表示),说明该恒温转变属于何种类型,并写出铜质量分数为28.1%的合金室温下的平衡组织。
桂林理工大学2020年硕士研究生入学考试试题(A卷)考试科目代码:889考试科目名称:管理学(总分150分,三小时答完)考生注意:1.请将答题写在答卷纸上,写在试卷上视为无效。
2.考试需带╳╳╳用具。
一、名词解释(每小题5分,共30分)1.概念技能2.决策3.网络计划技术4.矩阵式组织5.负强化6.非正式沟通二、简答题(每小题10分,共40分)1.什么是管理的社会属性?2.法约尔提出的有关企业经营的六大职能是什么?3.决策包括哪些步骤?4.组织中人员配备的原则是什么?三、论述题(每小题16分,共48分)1.管理者通常需要扮演哪些角色?每种角色有什么特征?2.什么是企业社会责任?它主要体现在哪些方面?3.请阐述管理方格理论的基本观点。
四、案例分析题(32分)1.案例1(16分)在《西游记》中,唐僧师徒四人受唐太宗委托,到西天取经,历尽了九九八十一难才终成正果。
在这个过程中,孙悟空的本事最大,一路上的妖魔鬼怪都由他来解决。
而取经团的团长唐僧却是弱不禁风的角色,吃饭要靠徒弟化斋,睡觉要靠徒弟找地方,赶妖除魔更是全要仰仗三个徒弟,时不时还会受妖精迷惑给徒弟添乱,完全是个被保护的角色。
问题:谁是取经团的领导者?为什么?2.案例2(16分)李强已40岁,回首二十几年的奋斗历程,很为自己早年艰苦而又自强不惜的日子感叹不已。
想当初自己没有稳定的工作就结了婚,妻子是位孤女,有父母留下的一栋虽然面积不小但很破旧的平房;妻子在待业当中,两人常为生计发愁;后来,李强在某企业找到了一份稳定工作,并很快地被提拔为工段长,接着又成为车间主任,进而升为生产部长。
他记得那段日子对他个人和公司来说都是极为重要的转折。
他没日没夜的为公司工作,很为自己是其中的一份子感到自豪。
他的付出也给他带来了丰厚的回报。
他的工资收入已经相当可观了,更重要的是,他在不断地提拔升级中得到了妻子很为他感到自豪的权力和地位。
有段时间,他也沾沾自喜过,可现在想来,觉得自己并没成就什么,心里老是空空的。
桂林理工大学2020年硕士研究生入学考试试题考试科目代码:211考试科目名称:翻译硕士英语(总分100分,三小时答完)考生注意:请将答题内容直接写在试题纸上Part I Choose the word or phrase that can replace the underlined part in each sentence without changing its original meaning.(每小题0.5分,共10分)1. I’m awfully sorry to have delayed answering your letter because of pressure of work.A. extendedB. stoppedC. postponedD. changed2. The theatre has been forced to beg for donation in order to keep it running.A.settleB. applyC. lookD. ask3. The fire in the office block was eventually brought under control.A. expectedlyB. finallyC. successfullyD. completely4. Sea snakes inject a poison so strong that it kills a fish instantly.A. effortlesslyB. easilyC. immediatelyD. finally5. When everyone was busy talking I slipped away.A. ran hurriedlyB. fell down on the groundC. left quietlyD. tiptoed6. Marx offered a profound analysis of the economic crisis.A. successfulB. correctC. deepD. final7. He gazed with longing and expectation into the future.A. wonderB. indifferenceC. desireD. curiosity8. The horse relaxed, and the rider slackened the rein.A. tightenedB. untiedC. fastenedD. loosened9. Don’t drag that table across the room, you’ll scratch the floor!A. tearB. pullC. drawD. push10. Mr. Brown is someone all the students look up to.A. missB. respectC. fearD. treat11. Don’t bother your boss with such unimportant matters.A. unworthyB. stupidC. optionalD. petty12. Barack Obama’s victory in the American presidential election was overwhelming.A. importantB. greatC. timelyD. unexpected13. Why are the contents of the next person’s shopping trolley always more alluring than one’s own?A. dissuasiveB. scaryC. attractiveD. constructive14. There is a slight difference in meaning between the two books.A. hugeB. subtleC. moderateD. gigantic15. She gradually perceived that her parents had been right.A. noticedB. knewC. acceptedD. realized16. He hated the war so much that he decided to leave the army for good.A. permanentlyB. for himselfC. for a short whileD. temporarily17. The answer had come to him in a flash.A. afterwardB. very quicklyC. in a glanceD. in a hurry18. The word “Hack” is a term of the technology culture which has come into existence over thepast few decades.A. come into beingB. widely usedC. become rareD. come forward19. The director has confessed himself puzzled by the company’s losses.A. toldB. acknowledgedC. comfortedD. reminded20. It’s downright impossible to finish the task in two days.A. downwardB. possiblyC. completelyD. perfectlyPart II Fill in the blank in each sentence with an appropriate form of the given word in the parenthesis. (每小题1分,共20分)1. This is Jim, my personal _________. (assist)2. Although I was quite sure that she has stolen my wallet, I could not find any__________. (prove)3. Completely exhausted, the soldiers could hardly walk any______. (far)4. Without your _________ he would never have been able to do it. (encourage)5. I haven’t received any pay rise for 3 years; I think all the other ______ have the same experience. (employ)6. The _______ of the money from the cash-box show that somebody in this office is a thief. ( appear)7. When I asked her about where she wanted to hold the meeting, she didn’t express any particular ________(prefer)8. Who can ______me that I’m wrong? (assurance)9. We should work out a global________ to develop our markets. ( strategically)10. After long________, she decided to turn down the job offer. (deliberate)11. She couldn’t stand the _________ and unfriendliness in the office so she decided to resign. ( compete)12. As a typical ______, he never took any noon nap. ( workaholism)13. Everyone among his friends and colleagues knew it _________.(instant)14. He worked himself to death, finally and ________, at 3:00 a.m. Sunday morning. (precise)15. They would depart ________as if leaving the crime scene without calling the police. (reluctance)16. Every house in this area is ________ against fire and theft.(insurance)17. It is _________ that none of them got invitation to the party. ( regret)18. It never _______ to me that he was a two-faced snobbish person. (occurrence)19. The of human species has been a long process. (evolve)20. How often do we__________people on how well they look, or express our appreciation fortheir’ kindness? (complimentary)Part III Explain the underlined part in each sentence in your own words (每小题1分,共10分)1.It’s no wonder that, despite their carefree facade, they are often confused, uncertain and troubled. ___________.2.If our parents didn’t get them for us, we felt our world fall apart. _________3.We slipped away to L.A. to tie the knot. _______4.Given that I’m color-blinded, it’s nearly impossible for me to become a driver. ________5.Conferences and business meetings around the world are held in English, regardless of whether anyone present is a native English speaker. __________6.The door opened and a little girl stood there, peering at me. _________7.In spite of my disease I still drove to and from work each day, with the aid of special equipment installed in my car. _________8.Unfortunately, integrity is in short supply today. _________9.Phil was a Type A, a heart-attack natural. ___________10.It is, in short, an agreeable, easy place to go about one’s business on foot. _______Part IV Fill in each blank with a word or phrase taken from the box. (每小题1分,共10分)1.2.A: Have you heard form Joan?B: No, I got a letter from her - when was it?- Oh, it must have been _____.3.A: Have you read any good books_______?B: Well, I’ve_____ finished the novel borrowed from library.4.Michael left for America in the 1980s. He_____ found a job and got married. It was only ______ that he managed to come back to Europe.5.When my father retires, he will______ move to his country cottage. _______ he will sell his town flat and settle in the country.6.I’ve only seen the mayor________, when he visited the local hospital.7.He’s _______ been working at night.Part V Explain in your own words the following sentences(每小题3分,共30分)1.In the United States we have become so habituated to using the car for everything that it doesn’t occur to us to unfurl our legs and see what those lower limbs can do.________________________________________________________________________________ ________________________________________________________________________________ 2.He had no outside “extracurricular interests,” unless, of course, you think about a monthly golf game that way.________________________________________________________________________________ ________________________________________________________________________________ 3.Popularity was not so important: running with the crowd was no longer a law of survival.________________________________________________________________________________ 4.The god of mirth is paying us back for all those years of thinking fun was everywhere by refusing to come to our party.________________________________________________________________________________ ________________________________________________________________________________ 5.Are all white lies to be avoided at all costs?________________________________________________________________________________ 6.Anything less than a hug may come across as chilliness.________________________________________________________________________________ 7.When you know you are right, you can’t back down.________________________________________________________________________________ 8.Integrity means having a personal standard of morality and ethics that does not sell out to expediency.________________________________________________________________________________ ________________________________________________________________________________ 9.When young, you are apt to be obsessed with your appearance._______________________________________________________________________________ 10.I realized that I was filled to overflowing with self-pity, selfishness, indifference to the needs of others and thoughtlessness.________________________________________________________________________________ ________________________________________________________________________________ Part VI Writing. (每小题20分,共20分)Directions:Write a composition in 250 words with a clear thesis statement and effective supporting arguments.The Virtues of Growing Up。
桂林理工大学2021年硕士研究生入学考试试题(A)考试科目代码:871考试科目名称:机械设计(总分150分,三小时答完)考生注意:1. 请将答题写在答卷纸上,写在试卷上视为无效。
2.考试需带三角板、2B铅笔、圆规、普通计算器用具一、填空题(每题2分,共20分)1. 一部机器基本的组成包括原动机部分、_______部分和______部分,其他还包括控制部分和辅助部分。
2. 零件的磨损过程大致分为三个阶段,即磨合阶段、_________阶段及_________阶段。
3. 螺纹联接的防松,按其防松原理分为__________防松、__________防松和破坏螺旋副运动关系防松。
4. 同一连接处采用两个楔键或两组切向键时,要错开_________。
5. 带传动的失效形式主要有_________和_________。
6. 链传动的链板一般制成8字形,以使它的各个横截面具有接近相等的_________,同时也减少了链的质量和运动时的________。
7. 在保证接触强度的前提下,增加齿数,除了能使重合度增加,有利于改善齿轮传动的_______外,还能降低______,减小齿轮尺寸。
8. 蜗杆头数越多,其传动效率_________,其自锁性__________。
9. 按基本额定动载荷设计计算的滚动轴承,在预定使用期限内,其失效概率最大为_________。
10. 心轴在工作中只受_______作用而不传递________。
二、选择题(每小题2分,共30分)1.零件的工作安全系数为_____。
A、零件的极限应力比零件的许用应力;B、零件的工作应力比零件的许用应力;C、零件的极限应力比零件的工作应力;D、零件的工作应力比零件的极限应力;2.零件的截面形状一定时,当截面尺寸增大,其疲劳极限将随之______A、增高;B、不变;C、降低;D、不确定;3.当温度升高时,润滑油的粘度 ________。
A、随之加大;B、保持不变;C、随之减小;D、增大还是减小或不变,视润滑油性质而定;4. 当两被联接件之一太厚,不宜制成通孔,且需要经常拆卸时,往往采用____。
A B CO-qQ Sq 2021年广西桂林理工大学普通物理考研真题一、选择题〔每题4分,共40分〕1. 质点在平面上运动,质点位置矢量的表示式为 j bt i at r 22+=〔其中a 、b 为常量〕, 那么该质点作 : (A) 匀速直线运动. (B) 变速直线运动.(C) 抛物线运动. (D) 一般曲线运动.2. 物体A 放于水平地面上,它与地面间的滑动摩擦系数为.现加一恒力F 如下图.欲使物体A 有最大加速度,那么恒力F与水平方向夹角应满足 (A) sin =. (B) cos=.(C) tg =. (D) ctg =.3. 质量为20 g 的子弹沿X 轴正向以 500 m/s 的速率射入一木块后,与木块一起仍沿X 轴正向以50 m/s 的速率前进,在此过程中木块所受冲量的大小为: (A) 9 N ·s . (B) -9 N ·s .(C)10 N ·s . (D) -10 N ·s .4. 如下图,置于水平光滑桌面上质量分别为m 1和m 2的物体A 和B 之间夹有一轻弹簧.首先用双手挤压A 和B 使弹簧处于压缩状态,然后撤掉外力,那么在A 和B 被弹开的过程中: (A) 系统的动量守恒,机械能不守恒. (B) 系统的动量守恒,机械能守恒. (C) 系统的动量不守恒,机械能守恒.(D) 系统的动量与机械能都不守恒.5. 均匀细棒OA 可绕通过其一端O 而与棒垂直的水平固定光滑轴转动,如下图.今使棒从水平位置由静止开场自由下落,在棒摆动到竖直位置的过程中,下述说法哪一种是正确的? (A) 角速度从小到大,角加速度从大到小. (B) 角速度从小到大,角加速度从小到大.(C) 角速度从大到小,角加速度从大到小.(D) 角速度从大到小,角加速度从小到大.6. 点电荷Q 被曲面S 所包围,从无穷远处引入另一点电荷q 至曲面外一点,如下图,那么引入前后:(A) 曲面S 的电场强度通量不变,曲面上各点场强不变(B) 曲面S 的电场强度通量变化,曲面上各点场强不变 (C) 曲面S 的电场强度通量变化,曲面上各点场强变化(D) 曲面S 的电场强度通量不变,曲面上各点场强变化7.点电荷-q 位于圆心O 处,A 、B 、C 、D 为同一圆周上的四点,如下图。