昆明理工大学平台作业(三)

society. A university which fails in this respect has no reason for existence. This atmosphere of excitement, arising from imaginative consideration, transforms knowledge. A fact is no longer a burden on the memory, it is energizing as the poet of our dreams and as the architect of our purposes.Imagination is not to be divorced from the facts: it is a way of illuminating the facts. It works by eliciting the general principles which apply to the facts, as they exist, and then by an intellectual survey of alternative possibilities which are consistent with those principles. It enables men to construct an intellectual vision of a new world, and it preserves the zest of life by the suggestion of satisfying purposes.Youth is imaginative, and if the imagination be strengthened by discipline, this energy of imagination can in great measure be preserved through life. The tragedy of the world is that those who are imaginative have but slight experience, and those who are experienced have feeble imagination. Fools act on听短文Directions:In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter with a single line through the center. [题数:10;分数:20分;参考时间:15分9秒][A] Twenty.[B] Forty.[C] Sixty.[D] Eighty.[A] They never forget great sadness.[B] They never remember great sadness.[C] They never remember great happiness.[D] They can't remember things very well.[A] An elephant lives apart.[B] Elephants live in families of males.[C] Elephants live in families of females.[D] Elephants can't live in families.[A] The older animals look after the younger ones.[B] The younger animals look after the older ones.[C] The mothers teach their daughters.[D] The mothers set a good example for their daughters.[A] He can use less than 3 percent of it.[B] He can use about 97 percent of it.[C] He can use exactly 3 percent of it.[D] He can use nearly 97 percent of it.[A] We can invent ways of increasing rainfall.[B] We can reduce the number of people.[C] We can cut down our need of water.[D] We can develop ways of re-using water and making use of sea water.[A] Water can only be used once.[B] Used water can be made usable again.[C] Recycled water is not fit for drinking.[D] Only rain water is drinkable.[A] How to improve listening ability.[B] How to read fast.[C] How to write better English and read fast.[D] How to speak correctly.[A] It is better to get a dictionary.[B] It is better to choose a good radio set.[C] It is better to read the news in Chinese first.[D] It is better not to look up the words in the dictionary.[A] Listening is more important than reading and writing.[B] You can start the second book ever if you don't understand the first one.[C] Don't try to run before you can walk.[D] Special English is too difficult for the learners of English.[总题数:50;总分数:100分;总参考时间:15分9秒]。

自主平台作业（综合词汇练习）Unit 11. After she'd overcome her shyness, she became very friendly.考答案】：DA. previousB. formerC. preliminaryD. initial2. Mary's parents frown the idea after going to America, so it remains to be seen【参考答案】：CA. forB. againstC. onD. at3. Compared with modern humans, her arms were long relative to her legs. [3].AA. somewhatB. somehowC. somethingD. somewhere4. Both sides consider it to further the understanding between the two peoples.BA. desiredB. desirableC. reliableD. stable5. At this moment Rivenoak approached, and, by a gesture of authority, induced the【参考答案】：CA. ironicalB. practicalC. criticalD. essential6. Urban problems revolve around meeting the needs of the existing inhabitants and replacing old and obsolete , especially housing. [6]. DA. utilitiesB. necessitiesC. propertiesD. facilities7. For the development of Western China, technology and education is given a . [7].【参考答案】：CA. superiorityB. inferiorityC. priorityD. seniority8. We all fears about the future. [8].【参考答案】：CA. harnessB. concealC. harborD. hoard9. When they talk about something, they tend to it. [9].【参考答案】：BA. generateB. exaggerateC. tolerateD. penetrate10. Oversleeping is not a excuse for being late for school. [10].【参考答案】：CA. vividB. feasibleC. validD. durable11. Frequent cultural exchange will certainly help friendly relations between our【参考答案】：AA. fosterB. motivateC. registerD. administer12. The technical accomplishment of Renaissance Europe was to those achieved by【参考答案】：DA. priorB. inferiorC. seniorD. superior13. He a sum of money in the bank each month. [13].【参考答案】：DA. posesB. withdrawsC. loansD. deposits14. However, there are instances where people of different social backgrounds end _____DA. onB. atC. inD. up15. Seen from this , they look rather pointless, don’t they?考答案】：CA. perceptionB. personnelC. perspectiveD. triangleUnit 2Part One Vocabulary and Structure1.【参考答案】：BA. preservedB. reservedC. reversedD. occupied2.【参考答案】：BA. inclinedB. liableC. likelyD. apt3.Additional ________, such as air-conditioning and bucket seats, made it an【参考答案】：AA. optionsB. choicesC. alternativesD. preferences4.【参考答案】：DA. linkedB. connectedC. unitedD. related5.Both the pink and the blue dresses are pretty, but I like the ________ better. [5].【参考答案】：CA. earlierB. beginnerC. formerD. first6.Putting in a new window will ________ cutting away part of the roof.【参考答案】：DA. containB. compriseC. includeD. involve7.New York ________ second in the production of apples, producing 850,000 pounds this【参考答案】：AA. rankedB. occupiedC. arrangedD. classified8.Mr. Wilson said that he did not want to any further responsibilities. [8].【参考答案】：AA. take onB. get onC. put upD. look up9.They in the face of disaster. [9].【参考答案】：CA. carried outB. carried offC. carried onD. carried forward10.I always the conviction that intelligence plus diligence can lead to success.【参考答案】：DA. get toB. see toC. lead toD. hold to11.The ages of children in the Hope primary school from 7 to 16.【参考答案】：BA. alteredB. rangedC. separatedD. differed12. We shall always remember him for his to the poor. [12].【参考答案】：BA. curiosityB. generosityC. seniorityD. priority13. We need to create education standards that prepare our next generation who will be【参考答案】：CA. imposedB. compliedC. confrontedD. confirmed14. He does not as a teacher of English as his pronunciation is terrible. [14].【参考答案】：CA. equalB. matchC. qualifyD. fit15. The driver gripped the wheel hard as the car bounced up and down. [15].【参考答案】：CA. stirringB. driving c. steering D. revolvingUnit 3Part One Building Up Your Vocabulary and Grammar1.The politician's actions do not with the promises in his speeches. [1].【参考答案】：DA. persistB. insistC. existD. consist2.But gradually, as years went by, her image began to from his memory. [2].【参考答案】：CA. diminishB. shrinkC. fadeD. vanish3.I wouldn't my job for anything because I enjoy it so much. [3].【参考答案】：CA. substituteB. replaceC. tradeD. mortgage4.I would not give my consent to his brother, nor yet give him a flat denial, but that Iwould hold him in a while. [4].【参考答案】：BA. regardB. suspenseC. contemptD. response5.Although we tried to concentrate on the lecture, we were by the noise from thenext room. [5].【参考答案】：CA. discouragedB. dismissedC. distractedD. discharged6.She should know to poke the animal with her umbrella. [6].【参考答案】：BA. worse thanB. better thanC. more thanD. less than7.The television station apologized for the , which was due to bad weatherconditions. [7].【参考答案】：DA. referenceB. inferenceC. conferenceD. interference8.This has been a timely reminder of the need for care. [8].【参考答案】：DA. continualB. consecutiveC. excessiveD. constant9.He shows ability in solving problems. [9].【参考答案】：CA. especialB. exclusiveC. exceptionalD. extra10.The president was so young that he was to some of his employees. [10].【参考答案】：DA. seniorB. priorC. superiorD. junior11.She prided herself on nothing more than her talent observation. [11].【参考答案】：BA. inB. forC. onD. with12. Thus man was as a rational being, as a social animal, an animal that can make tools,or a symbol-making animal. [12].【参考答案】：AA. definedB. confinedC. refinedD. enhanced13. My father seemed to be in no to look at my school report. [13].【参考答案】：CA. appetiteB. spiritC. moodD. temper14. Very few restaurant menus have translations, and multilingual waiters, bank clerksand policemen are . [14].【参考答案】：BA. bareB. rareC. scarceD. lacking15. The searching has down to a few streets where the gunman might be hiding. [15].【参考答案】：DA. reducedB. decreasedC. droppedD. narrowedUnit 4Part 1: Vocabulary Test1.I couldn’t speak Italian so I asked Maria to for me in the shop.【参考答案】：BA. interactB. interpretC. interfereD. interview2. They had to work at full to get the job finished in time.【参考答案】：DA. scratchB. silenceC. spellD. stretch3. Whether you use chat rooms, QQ, MSN or ICQ, you are part of a ___________community.【参考答案】：AA. virtualB. visualC. vitalD. vigorous4. "I was attracted to her, it turned out that we were completely incompatible."【参考答案】：BA. but forB. but thenC. but alsoD. in sight5. A writer mustn't be too to criticism. [5].【参考答案】：CA. sentimentalB. sensibleC. sensitiveD. sensational6. The trunks of the pines from the snow that covered all the ground. [6].【参考答案】：DA. promotedB. protestedC. puzzledD. projected7. So now we're working to try to the natural system. [7].【参考答案】：AA. restoreB. rewardC. rearD. rank8. Exceptional gifts him from other sculptors of his generation. [8].【参考答案】：CA. take…inB. keep…in sightC. set…apartD. rip…of9. She's completely on the idea of a camping holiday. [9].【参考答案】：BA. absorbedB. hookedC. lostD. immersed10. You can add the fluid to the powder or, , the powder to the fluid. [10].【参考答案】：CA. howeverB. insteadC. converselyD. moreover11. James Joyce’s novels are difficult to understand and impossible【参考答案】：AA. to translateB. for translationC. to translate itD. being translation12. A difficult situation can a person's best qualities. [12].【参考答案】：BA. call onB. call forthC. call forD. call off13. So bright was the boy that he all the knowledge his teachers would give【参考答案】：AA. took inB. took offC. took onD. took up14. Such was his fortune, and he was obliged to to it. [14].【参考答案】：CA. relyB. suckC. submitD. slip15. A cough is sometimes a of a serious disease. [15].【参考答案】：DA. symbolB. senseC. submissionD. symptomUnit 5Part One Building up Your Vocabulary and Grammar1.Archer had always been to think that chance and circumstance played a smallpart in shaping people's lots. [1].【参考答案】：Ba) A. declined B. inclined C. subjected D. submitted2.There's been a decline in the standard of living over the past few years. [2].【参考答案】：Da) A. continual B. vertical C. constant D. progressive3.The plumber is coming tomorrow to the new washing【参考答案】：Ca) A. equip B. fix C. install D. decorate4.She is about her chances of winning a gold medal. [4].【参考答案】：Aa) A. optimistic B. enjoyable C. agreeable D. realistic5.To a , it is possible to educate oneself. [5].【参考答案】：Ba) A. extent B. degree C. range D. level6.They endured hours of backbreaking work in conditions. [6].【参考答案】：Ca) A. favorable B. feasible C. miserable D. tolerable7.He just laughed and my proposal as unrealistic. [7].【参考答案】：Ca) A. discarded B. discharged C. dismissed D. disgusted8.After the arrival of the United Nations soldiers, tension in the area began to . [8].【参考答案】：Ba) A. cease B. ease C. loosen D. release9.In the event of fire, the alarm will sound at of 15 seconds. [9].【参考答案】：Da) A. spans B. periods C. sessions D. intervals10.She into his tray, knocking the food onto his lap. [10].【参考答案】：Aa) A. bumped B. knocked C. hit D. struck11.Intelligence and good humor are among his personality . [11].【参考答案】：Da) A. trends B. tendencies C. properties D. traits12.The explosion was of such that it was heard five miles away. [12]. 【参考答案】：Ca) A. density B. activity C. intensity D. relativity13.Evidence out the idea that students learn best in small groups. [13]. 【参考答案】：Da) A. works B. figures C. makes D. bears14.It can't be a coincidence that they left at the same time. [14].【参考答案】：Aa) A. mere B. just C. only D. barely15.Young children sometimes can't distinguish between and reality. [15]. 【参考答案】：Ba) A. illusion B. fantasy C. visualization D. vision。

城市学院物理习题解答（48学时）第一章 质点运动学一、选择题：1（D ），2（D ）， 3（C ）， 4（B ）， 5（D ）， 6（B ）， 7（B ）， 8（B ），9（D ）, 10（C ）， 11（B ）， 12（C ） 二、填空题：1、 )]()5cos()5sin([50SI j t i t+-, 0, 圆；2、]sin 2cos )[(22t t Aetωβωωωββ+--， 2,1,0)21(=+n n ωπ；3、tS ∆，t v ∆-02 ；4、24020)(,R bt v b bt v +++；5、)/(4,1622s rad Rt ； 6、（1），（3），（4）；7、)1(22S S +；8、)(4SI j i+-； 9、)/(20s m ；10、)/(1.02s m ；11、)(1,)(,2RC b cRct b c ±--；12、)/(20),/(3.17s m s m三、计算题１．解：（１）)/(5.0/s m t x v -=∆∆=；（２）269/t t dt dx v -==， s m v /6)2(-=； （３）m x x x x s 25.2|)5.1()2(||)1()5.1(|=-+-=．２．解：t dt dv a 4/==，tdt dv 4=⎰⎰=tvtdt dv 04， 22t v =22/t dt dx v ==⎰⎰=xtdt t dx 10022)(103/23SI t x +=．３．解：（１）t v x 0=， 221gt y =轨迹方程是：2022/v g x y =．（２）0v v x =， gt v y =．速度大小为： 222022t g v v v v y x +=+=．方向为：与Ｘ轴的夹角)/(01v gt tg -=θ22202//t g v t g dt dv a t +==，与v 同向．222002122/)(t g v g v a g a tn +=-=，方向与t a 垂直．4.解：由t kv dt dv 2/-=ktdt v dv -=2 积分：⎰⎰-=tdt k v dv2C kt v +-=-2211当0=t 时，0v v = 01v C -=∴ 得：21211v kt v += 5.解：设质点在x 处的速率为v ，262x dtdx dx dv dt dv a +=⋅==⎰⎰+=x v dx x vdv 020)62(s m x x v /)(22/13+=6.解：选地面为静止参考系s ，火车为运动参考系s '，雨滴为运动质点p ： 已知：绝对速度：ps v大小未知，方向与竖直方向夹030牵连速度：s m v s s /35='，方向水平； 相对速度：s p v '大小未知，方向偏向车后045． 由速度合成定理：s s s p ps v v v ''+=由矢量关系式画出矢量图，由几何关系可得：3530sin 30cos 00=+ps ps v vss 's m v ps /6.25=．第二章 牛顿定律一、选择题：1（B ），2（D ）， 3（E ）， 4（C ）， 5（B ）， 6（C ）。

2021年云南昆明理工大学环境工程学考研模拟试题A卷第一部分：水污染控制工程（共75分）一、名词解释 (每小题2分，共8分)1．污泥负荷率2．氧化沟3．重力浓缩法4．水环境容量二、填空题（每空1分，共13分）1．污泥沉降比可以反映曝气池正常运行时的污泥量，可用于控制______________的排放，及时反映出______________等异常情况。

2．生化过程中，水温上升有利于________、________、________等物理过程，但不利于________的转移。

3．厌氧消化过程划分为三个连续的阶段，即___________、___________和_____________。

4．所有各种杂质，按它们在水中的存在状态可分为三类：__________、__________和__________。

5．在好氧氧化塘中, 供氧主要通过_________________作用实现。

三、单选题 (每小题2分，共14分)1．下列说法不正确的是 ( )。

(A) 水形成自然循环的外因是太阳辐射和地球引力(B) 水在社会循环中取用的是径流水源和渗流水源(C) 生活污染源对环境污染最为严重(D) 工业污染源属于点源而非面源2．不属于吸附剂表面吸附力的是 ( )。

(A) 范德华力 (B) 表面张力(C) 化学键力 (D) 静电引力3．下列说法不正确的是 ( ）。

(A) 自由沉淀试验用沉淀柱的有效水深应尽量与实际沉淀池的水深相同(B) 絮凝沉淀试验用沉淀柱的有效水深应尽量与实际沉淀池的水深相同(C) 对于自由沉淀E~t曲线和E~u曲线都与试验水深有关(D) 对于絮凝沉淀E~t曲线和E~u曲线都与试验水深有关4．下列不属于水中杂质存在状态的是 ( )。

(A) 悬浮物 (B) 胶体(C) 溶解物 (D) 沉淀物5．某曝气池的污泥沉降比为25％，MLSS浓度为2021mg/L，污泥体积指数为 ( )。

(A) 25 (B) 100(C) 125 (D) 1506．介于活性污泥法和天然水体自净法之间的是 ( )。

《机械设计基础》学习概要及作业集（下册）姓名：学号：专业年级：学院：昆明理工大学目录第二章平面连杆机构--------------------------------------------------------------3第四章齿轮机构--------------------------------------------------------------------7第九章机械零件设计概论--------------------------------------------------------11 第十一章齿轮传动--------------------------------------------------------------------------------- 12第十三章带传动和链传动-----------------------------------------------------------16第十六章滚动轴承--------------------------------------------------------------------20第二章平面连杆机构教学目标1、知道何谓平面连杆机构？它有哪些优、缺点？2、清楚平面连杆机构有哪些运动和动力特性？3、知道铰链四杆机构存在曲柄的条件是什么？4、对机构演变的方法有所了解。

5、掌握四杆机构设计的几种方法。

6、了解常用四杆机构的特点及实际应用。

具体内容 1、平面连杆机构的特点2、铰链四杆机构的基本类型和特性3、铰链四杆机构曲柄存在条件4、平面四杆机构的演变方法5、平面四杆机构的设计基本要求平面连杆机构的优缺点及应用；急回特性、极位夹角、行程速比系数、压力角、传动角、最小传动角及其出现位置、死点；曲柄存在条件，图解法设计四杆机构。

重点铰链四杆机构的基本形式；铰链四杆机构的运动特性；曲柄存在条件；四杆机构的应用难点平面四杆机构的演化习题2—１试根据图中注明的尺寸判断下列铰链四杆机构是曲柄摇杆机构、双曲柄机构、还是双摇杆机构。

1. 二力杆的受力分析钢管所受的压力：F1=压杆失稳的临界力：F e =22L EI π其中：I 为钢管截面惯性矩：I=)(822D T A + 其中：A 为钢管截面面积：A=TD π钢管所受的压应力： σ=钢管的临界应力： = =有题目中给出数据：2F=300000N 即 F=150000N2B=1520mm 即 B=760mm T=2.5mm3/8300m kg =ρMpa s 700=σ E=2.1211/10m N ⨯解：1.建立数学模型 设计变量：⎥⎦⎤⎢⎣⎡=⎥⎦⎤⎢⎣⎡=H D x x x 21目标函数：221422577600101.2252)(x x HBD T x f +⨯=+=πρ 约束条件：1）圆管杆件中的压应力σ应小于或等于 ,即y TDHH B F σπσ≤+=22于是得2122157760019098.59)(x x x x g +=2）圆管杆件中的压应力σ应小于或等于压杆稳定的临界应力 ，由欧拉公式得钢管的压杆温度应力222152222225776006.25102.6)8()(x x H B T D E AL EIC ++⨯=++==ππσ2式中 A ――圆管的截面积；L ――圆管的长度。

于是得0)6006.25)/(577(102.657760019098.59)(2221521222≤++⨯-+=-=x x x x x x g c σσ3) 设计变量的值不得小于或等于0于是得)(0)(2213≤-=≤-=x x g x x g2．从以上分析可知，该优化设计问题具有2个设计变量，4个约束条件，按优化方法程序的规定编写数学模型的程序如下：/*用来解n 维具有不等式约束优化问题，文件名funct.c*/ /*下列子程序用来构造惩罚函数*/#include “stdio.h ” #include “stdlib.h ” #include “math.h ”const int kkg=4; /*常量，定义约束条件个数*/ double r0; /*全局变量，惩罚因子*/ double f(double x[]) /*目标函数子程序*/ {double ff;ff=1.225e4*x[0]*sqrt(577600.0+x[1]*x[1]); return(ff); }void strain(double x[],double g[]) /*约束条件子程序*/ {g[0]= 19098.59*sqrt(577600.0+x[1]*x[1])/(x[0]*x[1])-700.0; g[1]= 19098.59*sqrt(577600.0+x[1]*x[1)]/(x[0]*x[1]))- 2.6e5*(x[0]*x[0]+6.25)/(577600.0+x[1]*x[1]) ; g[2]= -x[0]; gx(3)=-x[1]; }double objf(double p[]) /*惩罚函数子程序*/ {int i;double ff,sg,*g;g=(double *)malloc(kkg *sizeof(double)); sg=0;strain(p,g);for(i=0;i<kkg;i++) {if(*(g+1)<0) sg=sg+r0/(*(g+i));elsesg=sg+r0*(1e+10);}free(g);ff=f(p)+sg;return(ff);}/*内点惩罚函数主程序，文件名mldfhs.c*/#include ”powell.c”/*调用powell法函数*/ void main(){int i;double p[]={72,700};double fom,fxo,c,x[2];c=0.4;ro=1;fom=100;do{fxo=powell(p,0.4,0.000001,0.000001,2,x);if(fabs(fom-fxo)>0.000001){fom=fxo;r0=c*r0;for(i=0;i<2;i++)*(p+i)=x[i];}else{printf(“输出最优点及其目标函数值：\n”); printf(“x[0]=%f,x[1]=%f,ff=%f \n”,x[0],x[1],fxo ); return;}}while(1);}。

课程名称：人工智能论文题目：中文语音识别技术的最新研究进展学院：信息工程与自动化学院专业：计算机科学与技术年级： 09级学生姓名：孙浩川（200910405310）指导教师：王剑教务处制摘要本文简要介绍了语音识别技术的发展历史，所采用的关键技术以及所面临的困难与挑战，最后讨论了语音识别在通信等领域中的应用。

机器能听懂人类的语言吗？我们能扔掉键盘、鼠标用自然语言操纵计算机吗？随着语音识别技术的发展，梦想正在变为现实。

语音识别以语音为研究对象，它是语音信号处理的一个重要研究方向，是模式识别的一个分支，涉及到生理学、心理学、语言学、计算机科学以及信号处理等诸多领域，甚至还涉及到人的体态语言（如人在说话时的表情、手势等行为动作可帮助对方理解），其最终目标是实现人与机器进行自然语言通信。

简要介绍语音识别的发展历史，采用的关键技术，面临的困难与挑战以及广阔的应用前景。

关键字：中文、语音识别、技术、发展目录一、语音识别技术的发展历史 (3)1、国外的发展形势 (3)2、国内的发展 (3)二、语音识别技术发展所面临的困难 (4)1、认识语音识别系统 (4)2、面临的困难 (4)3、解决困难的方法 (5)三、语音识别技术的应用以及发展前景 (5)1、目前语音识别技术在许多领域的应用 (5)2、对语音识别技术的发展前景 (6)四、结束语（结论） (6)谢辞 (7)参考文献 (8)一、语音识别技术的发展历史1、国外的发展形势首先，从国外的形势看来。

语音识别的研究工作可以追溯到20世纪50年代AT&T 贝尔实验室的Audry系统，它是第一个可以识别十个英文数字的语音识别系统。

但真正取得实质性进展，并将其作为一个重要的课题开展研究则是在60年代末70年代初。

实验室语音识别研究的巨大突破产生于20世纪80年代末：人们终于在实验室突破了大词汇量、连续语音和非特定人这三大障碍，他们把原本艰涩的HMM纯数学模型工程化，从而使统计方法成为了语音识别技术的主流，更多地从整体平均的角度来建立最佳的语音识别系统。

昆明理⼯⼤学⼯程⼒学习题册答案只限⾃⼰使⽤，请不要传播 —— 李鹏程第⼀章静⼒学基础⼆、填空题2.1 –F 1 sin α1； F 1 cos α1； F 2 cos α2； F 2 sin α2 ； 0 ；F 3 ； F 4 sin α4； F 4 cos α4。

2.2 1200 ， 0 。

2.3 外内。

2.4 约束；相反；主动主动。

2.5 3 ，2.6 ⼒偶矩代数值相等（⼒偶矩的⼤⼩相等，转向相同）。

三、选择题3.1 (c) 。

3.2 A 。

3.3 D 。

3.4 D 。

3.5 A 。

3.6 B 。

3.7 C 。

3.8四、计算题4.14.2五、受⼒图5.1B(e)(d) (a) mm KN F M ?-=18030)(mm KN F M ?=-=3.2815325)(20mm KN F M ?-=25210.)(01=)(F M x m N F M y ?-=501)(01=)(F M z m N F M x ?-=2252)(m N F M y ?-=2252)(m N F M z ?=2252)(mN F M x ?=2253)(mN F M y ?-=2253)(mN F M z ?=2253)(5.25.3(b)(c)P 2(d)(1) ⼩球 (2) ⼤球(3) 两个球合在⼀起ACB(1) AB 杆 (2) CD 杆 (3)整体只限⾃⼰使⽤，请不要传播 —— 李鹏程(1) AC 杆(2) CB 杆 (3)整体(1) AC 段梁 (2) CD 段梁(3)整体(1) CD 杆 (2) AB 杆 (3) OA 杆C(1) 滑轮D (2) AB 杆 (3) CD 杆只限⾃⼰使⽤，请不要传播——李鹏程第⼆章⼒系的简化⼀、是⾮判断题1.1( ×) 1.2( ∨) 1.2( ×)⼆、填空题2.1 平衡。

2.2 分布载荷图形的⾯积，合⼒矩定理，分布载荷图形的形⼼。

2.3平⾏⼒系合⼒的作⽤点；物体合重⼒的作⽤点；物体的⼏何中⼼。