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专生本(公共英语一)模拟试题及答案

专生本（公共英语一）模拟试题及答案Part I (50 points)Directions: In the section there are 50 incomplete sentences. For each sentence there are four choices marked A, B. C and D. Choose one answer that best completes the sentence. Then mark the corresponding letter on ANSWER SHEET.1. “Can I join your club, Dad?”“You can when you a bit older.”A. getB. will getC. are gettingD. will have got2. A computer think for itself, it must be told what to do.A. can'tB. couldn'tC. may notD. might not3. “Town Hall is the tallest building in the city.”“from here?”A. Can it seeB. Can it be seenC. Can it seenD. Can see4. I've thrown away my old trousers. I'll have to buy .A. a new pairB. a new oneC. some newD. one5. Today's homework is to write about your school.A. a five-hundred-word compositionB. a five-hundred-word's compositionC. a five-hundred-words compositionD. a five-hundreds-word composition6. I am of the two children in our family.A. tallestB. the tallC. the most tallestD. the taller7. I'm sorry to say of your answers is correct.A. eitherB. someC. eachD. neither8. I had to tell the truth, ?A. haven't IB. wouldn't IC. didn't ID. shouldn't I9. is still unknown.A. How he could break into the bankB. How he was able to break into the bankC. How he dare to break into the bankD. How dared he break into the bank10. The boy found a place in the old building he used as his first laboratory.A. whichB. whereC. in whichD. the same11.Make a mark you have an question.A. whatB. thatC. whereD. why12. Without electricity, human life quite different today.A. isB. will beC. would have beenD. would be13. The need foreign languages is becoming greater and greater.A. to learnB. learningC. to be learnedD. being learned14. The rest of the novel very interesting.A. wereB. areC. isD. be15. Only when the new bridge was completed, return home for a short rest.A. could he toB. he could toC. he was ableD. was he able to16. They are pulling down all the old houses in this street. I expect they down mine in afew months' time.A. pullB. are pullingC. will be pullingD. have pulled17. She's already an hour late. Something to her.A. can have happenedB. must have happenedC. should have happenedD. may have happened18. Doctors in every part of the world.A. needB. are needingC. are neededD. will need19. Tables are made of .A. woodB. woodsC. woodenD. some woods20. Mr. Smith will stay in China for .A. one and a half yearsB. one and a half yearC. one and half yearD. half and one year21. I got to the station than John.A. early twenty minutesB. earlier twenty minutesC. twenty minutes earlierD. twenty minutes early22. Young people may grow quickly in some ways and more slowly in .A. the otherB. some otherC. othersD. these others23. Let's time doing such silly things.A. don't wasteB. not to wasteC. waste notD. not waste24. came that the professor could not come.A. WordB. The wordC. SayingD. Words25. He showed the doctor the place he felt the pain.A. thatB. whenC. whichD. where26. Put on your raincoat it rains.A. becauseB. forC. in any caseD. in case27. it rain tomorrow, we would have to put off the visit to the Yang Pu Bridge.A. WereB. ShouldC. WouldD. Will28. The story is long. But it is worth .A. listenB. listening toC. listen to itD. to listen29. The young often very impatient with their elders.A. isB. areC. wereD. was30. It is through practice man has come to know the importance of natural balance.A. whichB. thatC. whoD. when31. Whenever he had time, he fishing at the lake.A. will goB. would goC. goD. went32. You don't to go there if you have no time.A. needB. wantC. mustD. ought33. A pair of glasses on the desk.A. is lainB. are lainC. is lyingD. were lying34. I need cloth, for I'm going to make clothes.A. a lot of; manyB. much; muchC. many; manyD. many; a lot of35. “When were you born?”“I was born .”A. on October twelfth nineteen sixty fiveB. on October the twelfth nineteen sixty fiveC. in nineteen sixty five October twelfthD. in nineteen sixty five October twelve36. The man was moved by the doctor's deeds.A. ill; deeplyB. sick; deepC. sick; deeplyD. ill; deep37. Why didn't you take medicine and hot water?A. some; someB. any; anyC. some; anyD. any; some38. What a pleasant day, ?A. is itB. shan'tC. isn't itD. won't39. They were surprised that a child should work out the problem they themselves couldn't.A. onceB. thenC. whileD. if40. All of the flowers now raised here have developed from those in the forest.A. once they grewB. they grew onceC. that once grewD. once grew41. a certain doubt among the students as to the necessity of the work.A. It existedB. There existedC. They hadD. There had42. We are looking forward great excitement to the first Olympic Games to be held inBeijing.A. withB. ofC. byD. to43. Will you attend the lecture next week?A. givingB. givenC. being givenD. to be given44. Nobody but you what he said.A. agree toB. agrees toC. agree withD. agrees with45. “Do you enjoy listening to records?”“I think records are often an actual performance.”A. as good as or better thanB. as good or better thanC. like good or better than thatD. as good as any other46. Mr. Green live in the country than in the city.A. had betterB. would likeC. would ratherD. would better47. He was wounded the leg, so he would no longer walk.A. onB. inC. atD. to48. Take much you want and you want to.A. however; whenB. whenever; wheneverC. however; whoeverD. however; whenever49. There is nothing in the world can frighten us.A. whereB. whichC. thatD. who50. The old professor something serious. Don’t bother him now.A. seems to think ofB. seems to have thought aboutC. seems to be thinking ofD. seemed thinking aboutPart II (50 points)Each of the following sentences has four underlined parts marked A, B, C, and D. Identify and correct the part of the sentence that is incorrect and write your answer on the ANSWER SHEET.举例说明: There are plenty of rain in the south of our country.A B C D（A ）_____is_____ （指出错处得1分，改正错处得1分，每题2分。

全国计算机等级一级考试模拟题及答案

全国计算机等级一级考试模拟题及答案一、选择题1. 下列哪个选项是正确的？- A. 电脑是一种常见的家用电器。

- B. 电脑只能用于上网和打游戏。

- C. 电脑只能由专业人士操作。

- D. 电脑在现代社会中没有任何用途。

正确答案：A2. 下列哪个不属于计算机硬件的组成部分？- A. CPU- B. 内存- C. 操作系统- D. 硬盘正确答案：C3. 下列哪个选项是正确的？- A. 输入设备用于将数据从计算机传输到外部设备。

- B. 输出设备用于将数据从外部设备传输到计算机。

- C. 存储设备用于将数据从计算机传输到外部设备。

- D. 控制设备用于将数据从外部设备传输到计算机。

正确答案：B4. 下列哪个选项是正确的？- A. Word是一款图像处理软件。

- B. Excel是一款电子表格软件。

- C. PowerPoint是一款数据库管理软件。

- D. Photoshop是一款文字处理软件。

正确答案：B5. 下列哪个选项是正确的？- B. 强密码可以提高账户的安全性。

- C. 共享账户密码可以提高网络安全。

- D. 防火墙不对网络安全起任何作用。

正确答案：B二、简答题1. 请简要解释什么是操作系统。

操作系统是计算机系统中负责管理和控制计算机硬件与软件资源的软件。

它提供了用户与计算机系统之间的接口，负责调度和管理计算机的各种任务，如内存管理、进程管理、文件系统管理等。

2. 请简要解释什么是计算机网络。

计算机网络是指通过通信链路连接起来的多台计算机和其他设备之间的互联互通系统。

它使得不同计算机之间可以进行数据传输和资源共享，提供了远程通信、信息交流和数据存储等功能。

3. 请简要解释什么是软件开发。

软件开发是指通过编程和开发工具创建应用程序或系统软件的过程。

它涉及需求分析、设计、编码、测试和维护等阶段，旨在满足用户的需求，并提供高质量、可靠的软件产品。

三、判断题1. 计算机的硬件资源包括CPU、内存和硬盘等。

石大《环境保护与可持续发展》模拟试题(一)及答案

《环境保护与可持续发展》模拟试题（一）一、选择题（每小题1分，共计10分）1、造成环境问题的根本原因是。

A.人口激增B.城市化进程C.工业发展D.资源消耗1972年6月5日B.1974年6月5日C.1975年6月5日D.1973年6月5日4、造成英国“伦敦烟雾事件”的主要污染是 A.烟尘和二氧化碳B.二氧化碳和氮氧化物C.烟尘和二氧化硫D.烟尘和氮氧化物5、联合国第一次人类环境会议在哪一年的什么地方召开？A.1972年，斯德哥尔摩B.1973年，巴黎C.1972年，巴黎D.1973年，斯德哥尔摩6、造成次生环境问题的主要因素有oA.对自然资源的过度开发和不合理利用B.对自然环境过度排放污染物C.破坏自然生态系统D.自然资源的分布不平衡7、可持续发展的内涵包括oA.人类的基本需求：衣食住行B.符合社会发展要求的高层次需求，一般通过合理的生活模式来实现。

C.经济发展是不可取的D.经济发展是在有限制条件下的发展 8、世界三大酸雨地区分布在A.北美、南美、欧洲B.北美、欧洲、中国长江以南C.南美、欧洲、中国长江以北D.南美、欧洲、非洲 9、固体废弃物综合处理处置的原则是2、环境污染主要包括. A. 大气污染、水污染、噪声污染、白色污染、土壤污染、以及农药污染等B. 大气污染、水污染、噪声污染、固体废弃污染、土壤污染、以及农药污染等C. 大气污染、水污染、白色污染、固体废弃物污染、土壤污染、以及农药污染等D. 大气污染、水污染、噪声污染、固体废物污染、白色污染、土壤污染、以及农药污染等 3、第•届“世界环境日”是. A. A.最小化、无害化、资源化 B.规范化、最小化、无害化C.无害化、资源化、规范化D.最小化、资源化、规范化10、我国水体的主要污染物包括有—A.有毒物质B.需氧有机污染物C.植物营养物D.酸性污染物E.碱性污染物二、判断题(每小题1分，共计15分)()1、原生环境问题是由自然力引起的,但可以通过人为力量避免。

2022心理知识竞赛真题模拟及答案(1)

2022心理知识竞赛真题模拟及答案(1)共769道题1、当一个人做出眼眉朝上、眨眼的面部模式时，表现那人正处于怎样的情绪中（）（单选题）A. 兴趣B. 愉快C. 惊奇D. 愤怒试题答案：C2、小步骤反馈来达到学习目标，也就是说，首先要把目标分成几个小目标，每完成一个小目标就要进行反馈或强化是（）的定义。

（单选题）A. 正强化B. 连锁塑造C. 负强化D. 惩罚试题答案：B3、学习策略可以分为：通用学习策略和（）。

（单选题）A. 高级学习策略B. 一般学习策略C. 学科学习策略D. 低级学习策略试题答案：C4、时间管理中，我们通常所说的时间杀手具体有哪些？（）（多选题）A. 迷惑B. 逃避C. 完美主义D. 拖延试题答案：A,B,C,D5、父母越是干预交往，彼此之间越相爱这一现象被称为（）（单选题）A. 皮格马利翁效应B. 晕轮效应C. 马太效应D. 罗密欧与朱丽叶效应试题答案：D6、科学家认为，人根据自己的生物钟安排学习生活，能更有效地利用学习时间，人体内存在有（）、情绪和智力三种周期。

（单选题）A. 体力B. 脑力C. 学习D. 记忆试题答案：A7、恋爱心理发展的主要过程有（）（多选题）A. 疏远异性期B. 接近异性期C. 交往友谊期D. 恋爱期试题答案：B,C,D8、大学生主要心理问题有（）（多选题）A. 理想自我与现实自我的冲突B. 适应新环境的能力较差C. 自尊心与自卑感的冲突D. 感情脆弱试题答案：A,B,C,D9、情绪ABC理论中的B代表什么意思（）（单选题）A. 个体在遇到诱发事件之后相应而生的信念、认知、评价及看法B. 个体的情绪及行为的结果C. 诱发事件D. 一个人的个性特征试题答案：A10、学习中，我们需要温故而知新，鉴往知来，触类旁通。

这种新旧学习之间的相互影响其实是：（）（单选题）A. 元认知B. 学习迁移C. 强化D. 一种学习模式试题答案：B11、皮亚杰认为幼儿期儿童的思维带有明显的（）性。

公共科考试：2022职业素质真题模拟及答案(1)

公共科考试：2022职业素质真题模拟及答案(1)共112道题1、（）是一种良好的职业精神和职业修养，是一种软实力。

（单选题）A. 职业技能B. 职业素养C. 职业计划D. 以上选项都不正确试题答案：B2、对于岗位匹配的主要因素有（）（多选题）A. 主动适应环境B. 岗位特征与个人特征匹配C. 岗位要求与个人素质匹配D. 岗位要求与个人能力匹配E. 注重能力拓展试题答案：B,C,D3、（）是职场的主要规则，也是职场运行的核心动力。

（单选题）A. 职业意识B. 职业抉择C. 职业生涯规划D. 竞争试题答案：D4、（）类型的组织结构的优点是能适应现代化生产技术比较复杂、管理工作比较精细化的企业。

（单选题）A. 直线制组织结构B. 职能制组织结构C. 事业部制组织结构D. 矩阵制组织结构试题答案：B5、（）是组织的核心理念，是一切生产、活动的基本准则。

（单选题）A. 文化精神B. 价值挂念C. 表现形式D. 效益追求试题答案：B6、（）过程是对信息去伪存真、去粗取精的过程。

（单选题）A. 信息搜集的内容B. 信息收集的渠道C. 就业信息的筛选D. 就业信息的运用试题答案：C7、（）具有挑战性、好交际、富有激情的典型特征。

（单选题）A. 实干者B. 协调者C. 推进者D. 创新者试题答案：C8、团队需求的角色有（）。

（多选题）A. 实干者B. 协调者C. 推进者D. 创造者E. 完美者试题答案：A,B,C,D,E9、下列选项中是职业匹配的关键要素的是（）（单选题）A. 能力匹配B. 学业匹配C. 家庭匹配D. 自我概念试题答案：A10、影响和制约职业素养的因素很多，但是这些因素不包括（）（单选题）A. 教育程度B. 职业能力C. 社会环境D. 时间经验试题答案：B11、在自主发展中，（）是自己未知而他人知道的部分，它的大小与自我观察、自我反省的能力有关。

（单选题）A. 开放我B. 隐藏我C. 盲目我D. 未知我试题答案：C12、社会交往的价值是（）（多选题）A. 生存和发展的需要B. 个人身心健康发展的需要C. 个人社会化的必经之路D. 获取知识的需要E. 实现个人价值、走向成功的需要试题答案：A,B,C,D,E13、社会交往中存在的主要问题有（）。

2022食品安全知识竞赛真题模拟及答案(1)

2022食品安全知识竞赛真题模拟及答案(1)共692道题1、热饮塑料杯盖上的三角形符号中标着“6”，下列哪个说法是正确的？（）（单选题）A. 杯盖的直径是6厘米B. 聚苯乙烯材料不能在微波炉中加热C. 聚氯乙烯材料能在微波炉中加热D. 只耐60℃温度试题答案：B2、下列食品中不能添加任何食品添加剂的品种是（）（单选题）A. 纯牛奶B. 酱油C. 奶油D. 火腿试题答案：A3、操作人员手部受到外伤，不得接触（），经过（）后，方可参加不直接接触食品的工作。

（单选题）A. 食品、治疗B. 食品或原料、包扎治疗戴上防护手套C. 成品、戴上防护手套试题答案：B4、唯一的一种液体金属是（），容易在水中扩散开来。

（单选题）A. 银C. 镁D. 铝试题答案：B5、对快速检测不合格的食品，工商行政管理机关执法人员应（）（多选题）A. 当场制作《流通环节食品快速检测结果不合格告知书》送达被抽检人。

B. 暂扣该批次快检不合格食品。

C. 抽取同一批次食品作为样品送检验机构检验。

D. 对当事人进行立案查处。

试题答案：A,C6、下列（）物质属于非食用物质。

（多选题）A. 吊白块B. 工业用甲醛C. 王金黄D. 苯甲酸钠试题答案：A,B,C7、以下哪些举措可用于预防食源性疾病？（）（多选题）A. 食物储存时保持洁净，生熟分开B. 使用冰箱长时间储存食物C. 食物烧熟煮透D. 使用安全的水和原材料加工食物试题答案：A,C,D8、县级以上卫生行政、质量监督、工商行政管理、食品药品监督管理部门应当按照法定权限和程序履行食品安全监督管理职责；对生产经营者的同一违法行为，不得给予（）次以上罚款的行政处罚；涉嫌犯罪的，应当依法向公安机关移送。

（单选题）B. 3C. 5试题答案：A9、目前使用食品添加剂方面存在的问题主要有哪几项（）（多选题）A. 把非食用物质作为食品添加剂B. 超量使用食品添加剂C. 超范围使用食品添加剂D. 载明“食品添加剂”字样试题答案：A,B,C10、（）的成品应分区存放，并有明显标识。

学位英语(机考模拟题及参考答案)(第一部分)

会计专业学位外语部分机考模拟题及参考答案（第一部分）一、语音题1 A .South B loudly C bought D brown2 A exercise B exit C text D expensive3 A city B mind C commit D since4 A case B nose C list D sight5 A text B expensive C exercise D exit6 A how B operate C on D a7 A cold B old C whole D some8 A good B moon C look D book9 A grammar B large C gay D glory10 A sight B case C nose D list11 A daughter B enough C fight D neighbor12 A ground B about C out D would13 A low B now C grow D Snow14 a brown b south c loudly d bought15 a with b time c light d like16 a large b gay c glory d grammar17 a exercise b exit c text d expensive18 a noise b place c office d horse19 A match B fast C have D sad20 A whole B some C cold D old21 A fast B have C said D match22 A libraries B grapes C changes D tables23 A either B though C through D another24 .A mind B limit C since D city25 A have B sad C match D fast参考答案：CDBBB ADBBC BDBDA ADABB AACAD二、对错题1Those of us who smoke should have their our hung lungs x-rayed regularly2He found it impossible to finish the work with3The problem is how we can operate the new machine on in such a short time4In Newtonian mechanics it is not difficulty not difficult to niter down the basic equations that must be solved in order to5He got two pieces of information about the new product678Now what that the newspaper arrived we can see the scores of the tennis matches.9 He got two pieces of informations about the new product.A about b product c got d information10 in Newtonian mechanics it is not difficulty to write down the basic equations thant must be solved in order to describe the motion of an object.A basic b must be solved c in d not difficulty11 now more and more young people are learning for the little herob nowc and d are12 the problem is how we can operate the new machine on such a short time.A operate b on c a d how13 on the days liked to write poetry, or paint with water colors, or cook an unusual dish.A to write b unusual dish14 easier for me to go there on foot than driving a cara than c easier d there15 the instructor had gone over the problems many times before the students will take the final examinationa will takeb overc many timesd before16 we usually looks it up in dictionary when he comes across a new word..17 now that the newspaper ….arrived we can see the scores of the tennis matches 加hadA can seeB of theC thatD arrived18 you should be working instead of lie there in bed lie----lying19、Jim was upset last night because he had to do too many homeworks.A had to doB many homeworksC upsetD because20、He cannot remember the thing whose made me very sad.A sadB cannotC thingD Whose21 He found it impossible to finish the work with such a short time.A ItB to finishC withD a22 He speaks English more fluently than his bother is.A thanB isC speaksD more23.The speech____ ,a lively discussion started.A was deliveredB having been deliveredC being deliveredD be delivered24.This is the problem___ you should pay attention.A whichB to whichC on whichD at which参考答案：CCCBB CCADD ABDBA AB略BD C BBB三、词汇题1 Inquiries the condition of the patients may be made personally or by telephoneA affecting b following c revealing d concerning2 that may eventually reduce the amount of labor needed on construction sites by 90 percent.A so clever the construction robots b such clever construction robots are c so clever are the construction robots d such construction robots are clever3 the student’s today is to write a book reportA association b assignment c attendance d responsibility4 the speech ,a lively discussion started.A having been delivered b being delivered c be delivered d was delivered5 this is a argumentA convinced c inconvincible d convince6 the officials in the at London airport were very polite.A customs b custom d custom7 the escaped prisoner waited until of night before leaving his hiding place.A dark b deep c depth d dead8 voice so that everyone can hear very clearlyA aloud d aloudly9 what time do you usually in the morning?A get up b get on c get over d get through10 we were for half an hour in the traffic and so we arrived lateA put back b broke down c held up d kept off11 this is the problem you should pay attentionA on which b at which c which d to which12 mary was going to a wedding so she brushed wellA her hairs b the hair c the hairs d her hair13 you will need the things a pen, a notebook and a ruler.A after b following c under d below14 I know noting about it what I have read in the papersA expect b except c besides d beside15 not until you work is finisheda can’t you leaveb you can leavec can you leaved you can’t leave16 he is given answers that only his confusionA come up b add to c come with d add with17 The escaped prisoner waited until of night before leaving his hiding place.A depthB deadC darkD deepHe never to read the news but turned at once to the crossword on the last pageA painedB troubledC worriedD noticed18 Did he say anything about how the workA was to be doneB to doC was to doD to be done1920The speech a lively discussion startedA was deliveredB having been deliveredC being deliveredD be delivered21know that either you or your father a copyA hasB are to haveC have hadD have22It made us very angry like theftA to hear him talkB to hear him to talkC hear him to talkD hear him talk23I____ my paper because it is too easy for me have handed.A withB inC out ofD over24It is desirable that the airplane___ as light as possible.A isB wereC beD had been25The race was so close that everyone was___ at the finish.A thinking ofB holding his breatheC working outD winning over26The business has__ from having one office to having twelve.A expandedB exposedC increasedD comprised27She ____ a new idea for increasing sales.A came up withB cam up atC came byD came for28I’m learning French, but I still can’t speak it____.A properlyB normallyC usuallyD really29____is easily seen.A The advantage of the economic reformB The economics’ reform advantageC The reform of the economic advantageD The economic reform’s advantage30The girl has made up her mind to go abroad with her boyfriend despite her parents’ ___ .A agreementB allowingC lettingD objection31As he was ill, he had to __ the party.A missB avoidC regretD lack32Shall we request the chairman__ our suggestion again?A to considerB consideringC considerD considered33 The road is kept open___ the year.A throughoutB thoughC throughoutD through34 His plan__ by those who heard it.A was laughedB were laughingC was laughing atD was laughed at35 My father never gave me .A. many adviceB. much adviceC. many advicesD. a lot of advices36 I be very nice if he could come for our party.A. willB. wouldC. shallD. was going towell.A. her hairB. her hairsC. the hairD. the hairs38 Shall we request the chairman our suggestion again?A. to considerB. consideringC. considerD. considered39 The company offered him high pay as an to accept the job.A. inducementB.C. invitationD. apple40 Unless he is intense love, he hardly even into someone else’s eyes for very long.A. confessingB. refusingC. grantingD. covering41 I ram Alice. Who was on her way to see how I was getting along.A. upB. out ofC. overD. into42 After the they drove to the Guest house at speed.A. topB. headC. wholeD. every43 They have never heard any .A. a customer complaint.B. the customer’s complaintsC. customer’s complaintD. the customers’ complaints44 She has nothing to do with the murder case. She is not it.A. concerned withB. related inC. involved inD. concerned in45 Could I borrow that book when you finished it?A. to readB. not to read46 I’I can stay only a few minutes.A. whichB. however D. though47 He lived to be twenty-eight, the man in BulgariaA. healthiestB. healthfulC. healthD. healthily48 Did he say anything about how the workA. to doB. was to do49 I felt that I was not yet to travel.A. strongly enoughB. enough stronglyC. strong enoughD. enough strong50 When her name was mentioned. I sam Mary from her seat.A. raiseB. raisingC. in riseD. rising51 He is given answers that only his confusion.A. add toB. come withC. add withD. come up52I could not persuade him to accept it make him see the importance of it.A. it only I could notB. or I could notC. no more than I couldD. nor could I53 The girl has made up her mind to do a broad with her boyfriend despite her parents’.A. agreementB. allowingC. lettingD. objection54 The road is kept open the year.A. throughoutB. thoughC. throughoutD. through55 Not until your work is finished .A. you can leaveB. can you leaveC. you can’t leaveD. can’t you leave56The of air travel during this century has made the world seem smaller.A. vacationB. connectionC. innovationD. liberation57 We forgave his bad temper because we know that his son’s illness had put him under great____A. emotionB. excitementC. crisisD. stress58 He smiled and told me I would receive anA. moreB. exactlyC. additionA. awayB. voyageC. boat tripD. excursion60 The escaped prisoner waited until of night before leaving his hiding place.A. darkB. deepC. depthD. dead61 many of the customers work during the day . Billy has to collect the money from them at night.A. SinceB. AlthoughC. There forD. From62 According to the author, the future doesn’t need .A. CreativityB. imaginationC. creatorsD. followers63 The you are ,the happier they will be.A more kinderB more kindC kinderD kind64 Inquiries the condition of the patients may be mead personally or be telephone.A revealingB concerningC affectingD following65 The sign ___ that cars cannot enter .A movesB meansC soundsD appears66 The company offered him high pay as an _____to accept the jop.A invitationB appleC inducementD aim67 ____That may eventually reduce the amount of labor needed on construction sites by 90 percent.A such cleven construction robots areB so clever are the construction robotsC such construction robots are cleverD so clever the construction robots68 Caught a ______of the taxi before it disappeared around the corner of the street .A visionB glimpseC lookD scene69 Mr wang is an engineer _____profession .A byB withC atD on70 He is given answers that only _____his confusionA add toB come withC add withD come up71 It’s a pity ______you missed such an interesting program.A whenB whatC thatD which72 mary was going to a wedding so she brushed ______wellA her hairsB the hairC the hairsD her hair73 The _____you are , the happier they will beA more kinderB more kindC kinderD kind74 _________many of the customers work during the day ,Billy has to collect the mony from them at night .A FromB sinceC Although75 send us message if you ______any difficulty .A have hadB haveC hadD will have76 The observer,s statement about the accident was very __________,we know almost every thing about it nowA especialB exceptionalC specialD specific77 What time do you usually _____in the morning?A get upB get onC get overD get through78 He said he ___________return from Germany the next day .A Would go toB is toC Was toD is going to79 I know nothing about it ________what I have read in the papersA expectB besidesC exceptD beside80 I tried very hard to persuade him to join our group but I met with a flat __________A refusalB declineC disapprovalD rejection81 disturbing her ,the news had a strangely calming effect.A insteadB in stead ofC in the steadD instead of82 He lived to be ninety-eight ,the ________man in Bulgaria.A healthB healthilyC healthiestD healthful83 the noise of the traffic __________paul from his work.A annoyedB upsetC preventedD distracted84 She did not feel ______going out .as she had a slight headacheA afterB forC aboutD like85 Mr john kept thinking hard ,but failed to _________a workable plan.A come up toB come up forC come up withD come up against86 It ________be very nice if he could come for our partyA willB wouldC shallD was going to87 It was not very _________of you to sell the house ,The price is increasing everyday .A kindB clearC friendlyD wise88 I,d rather read than watch television ,the programs seem __________all the time .A getting worseB to get worseC to be getting worseD to have got worse89 The government will have to work hard _________the confidence of the people after the temble event .A to come up withB to come atC to win backD to win through90 Many words in the English language are French inA originB vocabularyC contextD source91.I know that either you or your father ___a copy.A are to haveB have hadC haveD has92.As he was ill ,he had to___ the party.A missB avoidC regretD lack参考答案DCBBB CCCAC DDBCC BADAC AAABC BAAAA DAACD BBAAA ADACC DBACC DADDC BCDDA CA略CB BCBBA ACDCB BDADA DCCDC BDCCA DA四、阅读理解While plant and animal species are disappearing at a rapidly increasing rate throughout the world, scientists note some success stories. Fox example, the number of elephants killed illegally in Africa has fallen sharply.89 Thousand were killed in 1983.46 thousand were killed one year later.This happened because African countries agreed to establish export limits on ivory from elephants. Ivory is the hard white. Material that forms an elephant’s two long teeth, or tusks Countries that import ivory are refusing to accept ivory shipments that do not have legal export documents.The Convention on Intentioned Trade in Endangered Species in a treaty signed by 91 nations led to the program for saving endangered elephants. In Africa, successful efforts also have been made in protecting Africa’s endangered mountain gorillas. Almost 400 of the gorillas survive in a volcano area on the border of Rwanda, Uganda and Zaire. The mountain gorillas have remained about the same for 15 years. This happened partly. Because Rwanda developed an important business that depends on protecting the gorillas. Visitors. There can pay to get close to watch the gorillas in the animals traditional home area.Another successful programs to take endangered animals olla of their natural homes. The animals are put into zoos or Dither protected areas where they can reproduce in safety The goal of many of these programs is to produce enough animals to putback into the wild.1 what is the best title for this passage? Successful Programs of Saving the Wild2 The number of elephants killed illegally in Africa has decreased greatly intact3 In Africa, the number of elephants killed illegally in 1983 and 1984 was 89 thousand 46 thousand4 The number of mountain gorillas has remained about the same for marry years partly because of an important business depends on protecting the gorillas5 The phrase “the wild” in paragraph 5 refers to outdoorsCharlie chaplin has broken all records in making people laugh no one has so set a whole world laughing as the little man with the walking stick and the overlarge shoes.Much has been written about chapl in’s art and his career, and opinions have ranged widely. But perhaps those who called him “the most general human being of our time” came closest to the truth. Those who have called him a genius stress the timeless and common qualities in his work, it is an art filled with sad elements and deep human feeling, with which an audience cannot help but become involved. It is for these reasons, I believe, that th figure of Charlie has attracted generation after generation.All the writers who give accounts of ch aplin’s life agree that charlie’s unhappy early years in the area in London where houses were dirty and worn had a great influence on his development and on the type of films he made, chaplin himself emphasizes it in his memoirs(回忆录), the more one reads about his earliest period, the more on tends to agree indeed, his suffering youth had a lasting influence on him.Chaplin was never afraid to deal with subjects causing much disagreement in his films, he gave a humorous performance on war only a few weeks before the American soldiers came home from world war I in 1918, this was regarded as madness, but the performance was well received. So perfectly did it hit the mail on the head that even the returning soldiers found it impossible to hate it and deeply appreciated this short and humorous performance on what for them had been unpleasant reality. Chaplin gave numerous performances attacking capital governments, satirizing(讽刺) the cruelty of the machine age and even making fun of Hitler.Years after his death, the funny films of motion picture actor and director Charlie chaplin continue to be popular. He is particularly well known for his success as a creator of humorous presentations that make fun of people, the establishment, or networks.1 all of the following about Charlie chaplin are true excepta he was born in the USAb he was a great film actorc he had an unhappy early life d he made fun of Hitler in his films2 according to the author, Charlie chaplin has been popular with generation after generation becausea he set the whole world laughingb his performances get people involvedc his works appeal to people in different periodsd both B and C3 according to Charlie chaplin’s life history writers, had a strong influence on the type of films he made.a the society in which he livedb the audience who praised and admired himc those who called him a genius d his unhappy early years in the poor area in London4 according to the passage, which of the following true?a there are timeless qualities in chaplins work because he didn’t involve himself in political affairs.B chaplin became popular years after his death.C chaplin’s performance is funny without any sad elementsD chaplin’s films are the combinations of funny and sad elements5 this passage wasa written by Charlie chaplinb written about Charlie chaplinC advertising one of Charli e chaplin’s filmsD written for students to learn film-making参考答案：ABDDB“the more you learn, the more you earn,”said the pop singer Cyndi lauper as she accepted her high school diploma at the age of 35. in the USA today, about 75% of jobs require some education or technical training beyond high school. The lowest wage earners in the USA are those without high school degrees, college graduates out-earn those without a college education, people with master’s degrees out-earn those with only bachelor’s, and the highest incomes of all are earned by people with advanced academic degrees. These facts explain why mo st of young Americans go to college. But more diplomas don’t always mean more money. Many skilled blue-collar workers, salespeople, and business executives out-earn college professors and scientist. And great athletes and actors out- earn everyone else!But college education is not only preparation for a career, it is also (or should be) preparation for life. In addition to courses in their major field of study, most students have time to take elective course. They may take classes that help them understand more about human nature, government, the arts, or sciences.Today, more than half of American high school graduates go to college. But recently high school graduates no longer dominate the college campuses. Today, it is quite common for adults of all ages to come back to college for personal growth. Now about half of all the American college students are older than 25, and 20% of them are over 35.For Americans, to receive college education is very important. This is proved by the rising number of Americans who have at least a bachelor’s degree. About 20% of Americans are college graduates, however, among younger adults and working people, the percentage is at least 25%, much higher than in most other major nations, in the USA, college education is not regarded as privilege for the wealthy or the academically talented. In fact everyone who wants to go to college can do so.1many young Americans want to go to college becauseA their parents have a lot of money and can afford all their expensesB they can get higher income with higher degreesC college life is more interesting and attractive than high school lifeD they think it as a waste of their talents if they don’t receive college education2 it could be concluded from the second paragraph thatA college graduates earn more money than those people without college degreesB going to college is the dream of all the American peopleC college education can make a student understand a lot about the world around himD students will become more self-confident if they go to college3 when the students study in college, they canA take some courses that they are majoring inB take some elective coursesC take some courses that they are interested inD do all of the above4 in America, the percentage of college graduates among working people isA the same as in most other major nationsB much higher than in most other major nationsC much lower than in most other major nationsD not mentioned in the passage5 which of the following can most probably be inferred from the passage?A in the past, high school graduates account for the majority of college studentsB all of the Americans have realized the importance of receiving a college educationC today, most of Americans have at least a bachelor’s degree.D if you have more diplomas, you will surely earn more money than other people.参考答案：BCDBBIf you want to keep young, sit down and have a good think, this is the research finding of a team of Japanese doctors, who say that most of our brains are not getting enough exercise, and as a result, we are getting old soon.Professor taiju matsuzawa at Tokyo national university wanted to find out why quite he althy fanners in northern Japan appeared to be losing their ability to think and reason at rather early age, and how the speed of getting old could be slowed down. With a team of researchers, he set about measuring brain volumes of a thousand people of different ages and different jobsComputer technology enabled the researchers to get most exact measurements of the volume of the front and side parts of the brain, which have something to do with intellect and feelings, and decide the human character. As we all know, the back part of the brain, which controls tasks like eating and breathing, does not contract with age.Contraction of front and side parts as cells die off was seen in some subjects in their thirties, but it was still not evident in some sixty-and seventy-year -olds.Matsuzawa concluded from his tests that there is a simple way to prevent the contraction- using the head.The findings show that contraction of the brain begins sooner in people in the country than in the towns.”those with least possibility.” Said matsuzawa, “are lawyers, followed by university professors and doctors. White collar workers doing the same work day after day in government offices are, however, as likely to have contracting brains as the farm workers, bus drivers and shop assistants”1 the team of doctors wanted to find outA the size of some people’s brainB why some people age sooner than othersC what kind of people are very cleverD how to make people live longer2 the front and side parts of the brain relate to all of the following aspects EXCEPTa mental abilityb emotionc characterd eating and breathing3 the word “subjects”(in paragraph 4) most probably refers toA persons or things that are being discussed or consideredB persons chosen to be studied in an experimentC branches of knowledge studied in a schoolD words in a sentence about which something is stated4 according to the research findings, which kind of people seems to age most quickly?A doctors b lawyers c teachers d farm workers5 which of the following sentences is NOT mentioned in the passage?A professor matsuzawa suggested that people should use their brains more often because thinking can stop the brain from contractionB the research findings are based on the study of the brain sizes of different peopleC the team of doctors made these tests in order to show how the brain worksD the professor’s tests prove that old people’s brains have contracted more quickly than other young people参考答案：BDBDC。

言语交际模拟试题一及答案

A.第1联B.第2联 C.第3联D.第4联
2.“洛城一别四千里，胡骑长驱五六年。草木变衰行剑外，兵戈阻绝老江边。思家步月清宵立，忆弟看云白日眠。闻道河阳近乘胜，司徒急为破幽燕”（杜甫《恨别》）。本诗的的对仗联包括（ ABC ）。
A.第1联B.第2联 C.第3联D.第4联
3.“风急天高猿啸哀，渚清沙白鸟飞回。无边落木萧萧下，不尽长江滚滚来。万里悲秋常作客，百年多病独登台。艰难苦恨繁霜鬓，潦倒新停浊酒杯”（杜甫《登高》）。这首诗的对仗联包括（ BCD ）。
9.下列诗句中，属于对仗的是（ ABCD ）。
A.万山丛中，抗日英雄真不少；青纱帐里，游击健儿逞英豪!
B.端起了土枪洋枪，挥动着大刀长矛。C.“白日依山尽，黄河入海流。欲穷千里目，更上一层楼”（王之涣《登鹳鹊楼》）。
D.“两个黄鹂鸣翠柳，一行白鹭上青天。窗含西岭千秋雪，门泊东吴万里船”（杜甫《绝句四首》。
A. 套用，头发又油又光，深为帽子埋没，与之不共戴天，深冬也光着顶”（钱钟书《围城》）。这段话中引用的“不共戴天”属于成语活用中的（ D ）。
A. 套用 B. 谐音 C.拆离 D.曲解
11.“鸿渐道：‘给你说得结婚那么可怕，真是众叛亲离了。’辛楣笑道：‘不是众叛亲离，是你们自己离亲叛众。这些话不再谈了。我问你，你暑假以后有什么计划？’”（钱钟书《围城》）。这段话中引用的“离亲叛众”属于成语活用中的（ C ）。
D.野火烧不尽，春风吹又生。
18．选出夸张的一项（ C ）。
A.两个黄鹂鸣翠柳，一行白鹭上青天。
B.衣带渐宽终不悔，为伊消得人憔悴。
C.他有三天三夜没眨眼皮了。
D.俩年轻女演员，一个是丹凤眼，一个是小酒窝，丹凤眼和小酒窝在众人的怂恿下一唱一和。
19．选出借代的一项（ B）。

国家开放大学《工程经济与管理》模拟试题1及答案

国家开放⼤学《⼯程经济与管理》模拟试题1及答案⼀、判断正误题（每题2分，共20分）题⽬1正确获得2.00分中的2.00分标记题⽬题⼲⼯程经济的基本原则有定性分析和定量分析相结合，以定量分析为主。

选择⼀项：对错反馈正确的答案是“对”。

题⽬2正确获得2.00分中的2.00分标记题⽬题⼲价值⼯程的⽬的是以对象的最低寿命周期成本可靠地实现使⽤者所需功能，以获取最佳的综合效益。

选择⼀项：对错反馈正确的答案是“对”。

题⽬3正确获得2.00分中的2.00分标记题⽬题⼲固定资产的标准是：使⽤年限在三年以上，单位价值在规定的限额以上。

选择⼀项：对反馈正确的答案是“错”。

题⽬4正确获得2.00分中的2.00分标记题⽬题⼲财务净现值等于总投资现值乘以净现值率。

选择⼀项：对错反馈正确的答案是“对”。

题⽬5正确获得2.00分中的2.00分标记题⽬题⼲敏感系数越⼤，表⾯评价指标对不确定因素越不敏感。

选择⼀项：错反馈正确的答案是“错”。

题⽬6正确获得2.00分中的2.00分标记题⽬题⼲直接融资是指从银⾏及⾮银⾏⾦融机构借贷的信贷资⾦。

选择⼀项：对错正确的答案是“错”。

题⽬7获得2.00分中的2.00分标记题⽬题⼲可⾏性研究报告可作为项⽬科研试验、机构设置、职⼯培训、⽣产组织的依据。

选择⼀项：对错反馈正确的答案是“对”。

题⽬8正确获得2.00分中的2.00分标记题⽬题⼲现⾦流量表分为项⽬投资现⾦流量表、项⽬资本⾦现⾦流量表、投资各⽅财务现⾦流量表。

选择⼀项：对错反馈正确的答案是“对”。

题⽬9正确获得2.00分中的2.00分标记题⽬题⼲经济效益分为直接经济效益和间接经济效益，经济费⽤分为直接经济费⽤和间接经济费⽤。

选择⼀项：对错反馈正确的答案是“对”。

正确获得2.00分中的2.00分标记题⽬题⼲设备的第I类⽆形磨损是由于设备制造⼯艺不断改进，成本不断降低，劳动⽣产率不断提⾼，⽣产同种设备所需的社会必要劳动减少，因⽽设备的市场价格降低，这样就使原来购买的设备相应地贬值了。

管理经济学模拟试题及答案

管理经济学模拟试题1参考答案一、1—5:EDABD6-10:DBACB11_15:EBCEC二、判断题：（每题2分，共20分）（其中判断正确1分，改正正确1分）11.机会成本是一种实际发生的成本。

错误，机会成本是放弃的机会的价值，并未实际发生。

12.如果一种商品的收入弹性为负，这种商品的需求曲线一定有一负的斜率。

错误，吉芬品的收入弹性为负，但需求曲线斜率为正。

13.如果边际产量递减，那么平均产量一定也是递减的。

错误，当边际产量递减且边际产量>平均产量时，，而平均产量递增14.对完全垄断企业采用平均定价法，可使资源配置最有效率。

错误，对完全垄断企业采用边际成本定价法，可使资源配置最有效率。

15.相对而言，寡头垄断厂商之间的相互依存性较强，而垄断竞争厂商之间的相互依存性较弱。

正确16.垄断企业无论在短期中还是在长期中均不存在供给曲线。

正确17.决策时，唯一要考虑的成本是沉没成本，而不是增量成本。

错误。

决策时，要考虑的成本是增量成本，而不是沉没成本。

沉没成本与决策无关。

18.短期总成本曲线的斜率都等于短期可变成本曲线的斜率。

正确19.在长期内，所有生产要素都是变动要素。

正确20.完全竞争的模型是比较接近现实的市场，在现实中大量存在。

错误。

完全竞争的模型是抽象的理论模型，在现实中几乎不存在。

三、1、举例只要符合该法则即可，无标准答案。

2、（1）正确，有线电视服务（A）的需求价格弹性εPA-0.9<0，降低价格P，增加其观众数量Q。

（2）错误，-1<εPA=-0.9<0，有线电视服务缺乏弹性，因此，降低有线电视的服务价格会减少有线电视台的收入。

（3）错误，εAB=0.75>0，电影院和有线电视服务是替代品。

（4）错误，电影院和有线电视服务是替代品，降低电影院门票的价格会减少有线电视收视者数量。

（5）正确，电影院和有线电视服务是替代品，降低电影院门票的价格会减少有线电视台收入。

2020-2021学年河北省中考数学模拟试卷(1)及答案解析

河北省中考数学模拟试卷（1）一、选择题（下列各题的备选答案中，只有一个答案是正确的，将正确答案的序号填在题后的括号内，每小题3分，共24分）1．﹣3的相反数是（）A．3 B．C．﹣3 D．﹣2．下列计算正确的是（）A．a+a=a2B．（2a）3=6a3C．（a﹣1）2=a2﹣1 D．a3÷a=a23．如图，将边长为4个单位的等边△ABC沿边BC向右平移2个单位得到△DEF，则四边形ABFD的周长为（）A．12 B．16 C．20 D．244．下列命题中，真命题是（）A．两条对角线相等的四边形是矩形B．两条对角线互相垂直的四边形是菱形C．两条对角线互相垂直且相等的四边形是正方形D．两条对角线互相平分的四边形是平行四边形5．用配方法解方程x2+x﹣1=0，配方后所得方程是（）A．（x﹣）2=B．（x+）2=C．（x﹣）2=D．（x+）2=6．在半径为1的⊙O中，弦AB=1，则的长是（）A．B．C．D．7．估计+1的值是（）A．在42和43之间 B．在43和44之间 C．在44和45之间 D．在45和46之间8．已知如图，抛物线y=ax2+bx+c与x轴交于点A（﹣1，0）和点B，化简的结果为①c，②b，③b﹣a，④a﹣b+2c，其中正确的有（）A．一个B．两个C．三个D．四个二、填空题9．从一副扑克牌（除去大小王）中摸出两张牌都是梅花的概率为．10．如图，直线y=kx（k＞0）与双曲线y=交于A（a，b），B（c，d）两点，则3ad ﹣5bc= ．11．分解因式：x3﹣xy2= ．12．如图，四边形ABCD是平行四边形，E为BC边的中点，DE、AC相交于点F，若△CEF的面积为6，则△ADF的面积为．13．等腰三角形的腰长为2，腰上的高为1，则它的底角等于．14．有边长为1的等边三角形卡片若干张，使用这些三角形卡片拼出边长为2、3、4…的等边三角形（如图所示），根据图形推断，每个等边三角形所用的等边三角形所用的卡片数S与边长n的关系式是．15．如果一个三角形的三边长为5、12、13，与其相似的三角形的最长的边为39，那么较大的三角形的周长为，面积为．16．△ABC是⊙O的内接三角形，∠BAC=60°，D是的中点，AD=a，则四边形ABDC 的面积为．三、解答题（第17小题6分，第18、19小题各8分，第20小题10分，共32分）17．3﹣2+4﹣（2006﹣sin45°）018．已知，求代数式的值．19．如图，在平面直角坐标系中，点A的坐标为（3，﹣3），点B的坐标为（﹣1，3），回答下列问题（1）点C的坐标是．（2）点B关于原点的对称点的坐标是．（3）△ABC的面积为．（4）画出△ABC关于x轴对称的△A′B′C′．20．已知：如图，AB是⊙O的直径，⊙O过AC的中点D，DE切⊙O于点D，交BC 于点E．（1）求证：DE⊥BC；（2）如果CD=4，CE=3，求⊙O的半径．四、应用题21．初三年（4）班要举行一场毕业联欢会，主持人同时转动下图中的两个转盘，由一名同学在转动前来判断两个转盘上指针所指的两个数字之和是奇数还是偶数，如果判断错误，他就要为大家表演一个节目；如果判断正确，他可以指派别人替自己表演节目．现在轮到小明来选择，小明不想自己表演，于是他选择了偶数．小明的选择合理吗？从概率的角度进行分析（要求用树状图或列表方法求解）22．如图，在一块如图所示的三角形余料上裁剪下一个正方形，如果△ABC为直角三角形，且∠ACB=90°，AC=4，BC=3，正方形的四个顶点D 、E 、F 、G 分别在三角形的三条边上．求正方形的边长．五、解答题（本题12分）23．已知：如图所示的一张矩形纸片ABCD （AD ＞AB ），将纸片折叠一次，使点A 与C 重合，再展开，折痕EF 交AD 边于E ，交BC 边于F ，分别连接AF 和CE ．（1）求证：四边形AFCE 是菱形；（2）若AE=10cm ，△ABF 的面积为24cm 2，求△ABF 的周长；（3）在线段AC 上是否存在一点P ，使得2AE 2=AC •AP ？若存在，请说明点P 的位置，并予以证明；若不存在，请说明理由．六、解答题（本题12分）24．某开发公司现有员工50名，所有员工的月工资情况如下表：员工管理人员普通工作人员人员结构总经理部门经理科研人员销售人员高级技工中级技工勤杂工员工数/名14 2 322 3 每人月工资/元 21000 84002025220018001600950请你根据上述内容，解答下列问题：（1）该公司“高级技工”有人；（2）该公司的工资极差是元；（3）小张到这家公司应聘普通工作人员，咨询过程中得到两个答案，你认为用哪个数据向小张介绍员工的月工资实际水平更合理些？（4）去掉最高工资的前五名，再去掉最低工资的后五名，然后算一算余下的40人的平均工资，说说你的看法．七、计算题（本题12分）25．某软件公司开发出一种图书管理软件，前期投入的开发广告宣传费用共50000元，且每售出一套软件，软件公司还需支付安装调试费用200元．（1）试写出总费用y（元）与销售套数x（套）之间的函数关系式．（2）如果每套定价700元，软件公司售出多少套可以收回成本？（3）某承包商与软件开发公司签订合同，买下公司生产的全部软件，但700元的单价要打折，并且公司仍然要负责安装调试．如果公司总共可生产该软件1500套，并且公司希望从这个软件项目上获得不少于280000元的利润，最多可以打几折？八、计算题（本题14分）26．如图，抛物线y=x2﹣4x﹣1顶点为D，与x轴相交于A、B两点，与y轴相交于点C．（1）求这条抛物线的顶点D的坐标；（2）经过点（0，4）且与x轴平行的直线与抛物线y=x2﹣4x﹣1相交于M、N两点（M在N的左侧），以MN为直径作⊙P，过点D作⊙P的切线，切点为E，求点DE 的长；（3）上下平移（2）中的直线MN，以MN为直径的⊙P能否与x轴相切？如果能够，求出⊙P的半径；如果不能，请说明理由．参考答案与试题解析一、选择题（下列各题的备选答案中，只有一个答案是正确的，将正确答案的序号填在题后的括号内，每小题3分，共24分）1．﹣3的相反数是（）A．3 B．C．﹣3 D．﹣【考点】相反数．【分析】根据相反数的概念解答即可．【解答】解：∵互为相反数相加等于0，∴﹣3的相反数是3．故选：A．【点评】此题主要考查了相反数的意义，一个数的相反数就是在这个数前面添上“﹣”号；一个正数的相反数是负数，一个负数的相反数是正数，0的相反数是0．2．下列计算正确的是（）A．a+a=a2B．（2a）3=6a3C．（a﹣1）2=a2﹣1 D．a3÷a=a2【考点】完全平方公式；合并同类项；幂的乘方与积的乘方；同底数幂的除法．【分析】根据合并同类项运算法则和积的乘方法则、完全平方公式以及同底数幂的除法法则逐项计算即可．【解答】解：A，a+a=2a≠a2，故该选项错误；B，（2a）3=8a3≠6a3，故该选项错误C，（a﹣1）2=a2﹣2a+1≠a2﹣1，故该选项错误；D，a3÷a=a2，故该选项正确，故选D．【点评】本题考查了并同类项运算法则和积的乘方法则、完全平方公式以及同底数幂的除法法则，解题的关键是熟记以上各种运算法则．3．如图，将边长为4个单位的等边△ABC沿边BC向右平移2个单位得到△DEF，则四边形ABFD的周长为（）A．12 B．16 C．20 D．24【考点】平移的性质；等边三角形的性质．【专题】数形结合．【分析】根据平移的性质易得AD=BE=2，那么四边形ABFD的周长即可求得．【解答】解：∵将边长为4个单位的等边△ABC沿边BC向右平移2个单位得到△DEF，∴AD=BE=2，各等边三角形的边长均为4．∴四边形ABFD的周长=AD+AB+BE+FE+DF=16．故选B．【点评】本题考查平移的性质，用到的知识点为：平移前后对应线段相等；关键是找到所求四边形的各边长．4．下列命题中，真命题是（）A．两条对角线相等的四边形是矩形B．两条对角线互相垂直的四边形是菱形C．两条对角线互相垂直且相等的四边形是正方形D．两条对角线互相平分的四边形是平行四边形【考点】命题与定理．【分析】分析是否为真命题，需要分别分析各题设是否能推出结论，从而利用排除法得出答案．【解答】解：A．两条对角线相等的平行四边形是矩形，故本选项错误；B．两条对角线互相垂直的平行四边形是菱形，故本选项错误；C．两条对角线互相垂直且相等的平行四边形是正方形，故本选项错误；D．两条对角线互相平分的四边形是平行四边形，正确；故选：D．【点评】主要考查命题的真假判断，正确的命题叫真命题，错误的命题叫做假命题．判断命题的真假关键是要熟悉课本中的性质定理．5．用配方法解方程x2+x﹣1=0，配方后所得方程是（）A．（x﹣）2=B．（x+）2=C．（x﹣）2=D．（x+）2=【考点】解一元二次方程﹣配方法．【分析】移项后两边都配上一次项系数一半的平方可得．【解答】解：∵x2+x=1，∴x2+x+=1+，即（x+）2=，故选：D．【点评】本题主要考查配方法解一元二次方程，熟练掌握配方法解方程的基本步骤是解题的关键．6．在半径为1的⊙O中，弦AB=1，则的长是（）A．B．C．D．【考点】弧长的计算．【分析】先利用垂径定理求出角的度数，再利用弧长公式求弧长．【解答】解：如图，作OC⊥AB，则利用垂径定理可知BC=∵弦AB=1，∴sin∠COB=∴∠COB=30°∴∠AOB=60°∴的长==．故选C．【点评】此题先利用垂径定理求出角的度数，再利用弧长公式求弧长．7．估计+1的值是（）A．在42和43之间 B．在43和44之间 C．在44和45之间 D．在45和46之间【考点】估算无理数的大小．【分析】首先拿44的平方试一下，45的平方大于2009，所以很容易得到结果．【解答】解：∵1936＜2009＜2025，∴44＜＜45，即45＜＜46．故选D．【点评】本题考查估计无理数的大小，本题是选择题可以先从选项算起，很容易得到结论．8．已知如图，抛物线y=ax2+bx+c与x轴交于点A（﹣1，0）和点B，化简的结果为①c，②b，③b﹣a，④a﹣b+2c，其中正确的有（）A．一个B．两个C．三个D．四个【考点】抛物线与x轴的交点；二次根式的性质与化简．【专题】压轴题；数形结合．【分析】先把A点坐标代入抛物线的解析式可得a﹣b+c=0，再根据抛物线的开口向下可得a＜0，由抛物线的图象可知对称轴在x轴的正半轴可知﹣＞0，抛物线与y 轴相交于y轴的正半轴，所以c＞0，根据此条件即可判断出a+c及c﹣b的符号，再根据二次根式的性质即可进行解答．【解答】解：∵抛物线y=ax2+bx+c与x轴交于点A（﹣1，0），∴a﹣b+c=0，即a+c=b，∵抛物线的开口向下，∴a＜0，∵对称轴在x轴的正半轴可知﹣＞0，∴b＞0，∵抛物线与y轴相交于y轴的正半轴，∴c＞0，∴a+c=b＞0，c＞b，∴①原式=b+（c﹣b）=c，故①正确，④原式=a+c+c﹣b=a﹣b+2c，故④正确．③∵a﹣b+c=0∴原式=a﹣b+2c=a﹣b+c+c=0+c=c，故③正确．故选C．【点评】本题考查的是抛物线与x轴的交点，涉及到抛物线的图象与系数的关系，抛物线的对称轴方程等相关知识．二、填空题9．从一副扑克牌（除去大小王）中摸出两张牌都是梅花的概率为．【考点】加法原理与乘法原理．【专题】计算题．【分析】让摸出第一张牌是梅花的概率乘以摸出第二张牌是梅花的概率即为所求的概率．【解答】解：第一张摸出梅花的概率：=，此时梅花还剩12张，牌一共还有51张，第二张又摸到梅花的概率是：=，两张牌都摸到梅花的概率是：×=，故答案为．【点评】考查乘法原理的应用；两次实验的概率=第一次实验的可能性与第二次实验的可能性的积．10．如图，直线y=kx（k＞0）与双曲线y=交于A（a，b），B（c，d）两点，则3ad ﹣5bc= 6 ．【考点】反比例函数与一次函数的交点问题．【专题】计算题．【分析】本题需先根据交点的性质，把A（a，b），B（c，d）分别代入直线y=kx（k ＞0）与双曲线y=中，求出它们之间相等的量，最后再把他们代入及可求出结果．【解答】解：∵直线y=kx（k＞0）与双曲线y=交于A（a，b），B（c，d）两点，∴把A（a，b），B（c，d）代入上式得；k=，k=∴∴ad=bc∵ab=3，cd=3∴abcd=9，即（ad）2=9，∴ad=bc=﹣3，∴3ad﹣5bc=﹣9+15=6．故答案为6．【点评】本题主要考查了反比例函数与一次函数的交点问题，在解题时要注意交点与函数的性质问题．11．分解因式：x3﹣xy2= x（x+y）（x﹣y）．【考点】提公因式法与公式法的综合运用．【分析】首先提取公因式x，进而利用平方差公式分解因式得出答案．【解答】解：x3﹣xy2=x（x2﹣y2）=x（x+y）（x﹣y）．故答案为：x（x+y）（x﹣y）．【点评】此题主要考查了提取公因式法以及公式法分解因式，熟练应用平方差公式是解题关键．12．如图，四边形ABCD是平行四边形，E为BC边的中点，DE、AC相交于点F，若△CEF的面积为6，则△ADF的面积为24 ．【考点】平行四边形的性质．【专题】压轴题；数形结合．【分析】根据E为BC边的中点可得出CE和AD的比，进而根据面积比等于相似比的平方可得出△ADF的面积．【解答】解：∵四边形ABCD是平行四边形，E为BC边的中点，∴=，∴S△CFE：S△ADF=1：4，又∵△CEF的面积为6，∴△ADF的面积为24．故答案为：24．【点评】本题考查平行四边形的性质，属于基础的应用题，难度不大，解答本题的关键是掌握面积比等于相似比的平方．13．等腰三角形的腰长为2，腰上的高为1，则它的底角等于15°或75°．．【考点】等腰三角形的性质；勾股定理．【专题】计算题；分类讨论．【分析】此题分两种情况，当顶角为锐角时，利用勾股定理，AD的长，然后即可得出∠ABD=60°，可得顶角度数．同理即可求出顶角为钝角时，底角的度数．【解答】解；如图1，△ABC中，AB=AC=2，BD为腰上的高，且BD=1，顶角为锐角，∵AD2=AB2﹣BD2，∴AD2=4﹣1=3，∴AD=，∴∠ABD=60°，∴顶角为30°，底角为75°；如图2，△ABC中，AB=AC=2，BD为腰上的高，且BD=1，顶角为钝角同理可得，底角为15°．故答案为：15°或75°．【点评】此题主要考查学生对等腰三角形性质的理解和掌握，解答此题的关键是利用分类讨论的思想进行分析，对顶角为锐角和顶角为钝角时分别进行分析．14．有边长为1的等边三角形卡片若干张，使用这些三角形卡片拼出边长为2、3、4…的等边三角形（如图所示），根据图形推断，每个等边三角形所用的等边三角形所用的卡片数S与边长n的关系式是S=n2（n≥2）．【考点】函数关系式；规律型：图形的变化类．【分析】长特殊到一般探究规律后，利用规律即可解决问题．【解答】解：图1中，当n=2时，S=4；如图2中当n=3时，S=9；图3中，当n=4时，S=16．…．依此类推，总数S与边长n的关系式S=n2（n≥2）．故答案为S=n2（n≥2）【点评】本题考查函数关系式、规律型：图形的变化类题目，解题的关键是学会从特殊到一般的探究方法，学会探究规律，利用规律解决问题．15．如果一个三角形的三边长为5、12、13，与其相似的三角形的最长的边为39，那么较大的三角形的周长为90 ，面积为270 ．【考点】相似三角形的性质；勾股定理的逆定理．【分析】由相似三角形对应边比相等，知道已知三角形的三边和较大三角形的最大边，根据相应比求得边和周长，由三角形是直角三角形面积即求得．【解答】解：设较大三角形的其他两边长为a，b．∵由相似三角形的对应边比相等∴解得：a=15，b=36，则较大三角形的周长为90，面积为270．故较大三角形的周长为90，面积为270．【点评】本题考查了相似三角形对应边的比相等，根据已知三角形的三边，未知三角形的最长边，知道了对应比，从而求得．16．△ABC是⊙O的内接三角形，∠BAC=60°，D是的中点，AD=a，则四边形ABDC的面积为a2．【考点】圆内接四边形的性质；含30度角的直角三角形；圆周角定理．【专题】计算题；压轴题．【分析】根据题意求得∠DBC=∠DCB=30°，设BD=DC=x，那么BC=x，由正弦定理和托勒密定理AB+AC=a，再根据S四边形ABDC=S△ABD+S△ACD，从而求得答案．【解答】解：解法一：在ABDC中，∠BAC=60度，所以∠BDC=120°，∵点D是弧BC的中点，∴BD=DC，∴∠DBC=∠DCB=30°，在△BDC中用正弦定理，得∴BC=BD，设BD=DC=x，那么BC=x，用托勒密定理：AD•BC=AB•DC+BD•AC，即ax=x•AB+x•AC，则AB+AC=a，S四边形ABDC=S△ABD+S△ACD=（AB•AD•sin∠BAD+AC•AD•sin∠DAC），=（AB+AC）AD•sin30°，=a2；解法二：如图，过点D作DE⊥AB，DF⊥AC，垂足分别为E、F，∵D是的中点，∴BD=CD，∠BAD=∠FAD，∴DE=DF（角平分线上的点到角的两边的距离相等），在Rt△DBE与Rt△DCF中，，∴Rt△DBE≌Rt△DCF（HL），∴S△DBE=S△DCF，∴S四边形ABDC=S四边形AEDF，∵点D是弧BC的中点，∠BAC=60°，∴∠BAD=∠BAC=×60°=30°，∵AD=a，∴AE=AD•cos30°=a，DE=AD•sin30•=a，∴S四边形AEDF=2S△ADE=2××a×a=a2．故答案为：a2．【点评】本题考查了圆内接四边形的性质以及圆周角定理，是竞赛题难度偏大．三、解答题（第17小题6分，第18、19小题各8分，第20小题10分，共32分）17．3﹣2+4﹣（2006﹣sin45°）0【考点】特殊角的三角函数值；二次根式的混合运算．【专题】计算题．【分析】本题涉及零指数幂、二次根式化简及特殊角的三角函数值等考点．针对每个考点分别进行计算，然后根据实数的运算法则求得计算结果．【解答】解：3﹣2+4﹣（2006﹣sin45°）0，=3﹣2+20﹣×1，=20．【点评】本题考查实数的综合运算能力，是各地中考题中常见的计算题型．解决此类题目的关键是掌握零指数幂、二次根式化简及特殊角的三角函数值等考点的运算．18．已知，求代数式的值．【考点】二次根式的化简求值．【专题】计算题．【分析】由已知条件得到a﹣1=1﹣＜0，再把代数式利用因式分解变形得到原式=﹣，则根据二次根式的性质得原式=a﹣1﹣=a﹣1+，然后把a的值代入计算即可．【解答】解：∵a=2﹣，∴a﹣1=1﹣＜0，∴原式=﹣=a﹣1﹣=a﹣1+，当a=2﹣时，原式=2﹣﹣1+=2﹣﹣1+2+=3．【点评】本题考查了二次根式的化简求值：一定要先化简再代入求值．二次根式运算的最后，注意结果要化到最简二次根式，二次根式的乘除运算要与加减运算区分，避免互相干扰．19．如图，在平面直角坐标系中，点A的坐标为（3，﹣3），点B的坐标为（﹣1，3），回答下列问题（1）点C的坐标是（﹣3，﹣2）．（2）点B关于原点的对称点的坐标是（1，﹣3）．（3）△ABC的面积为16 ．（4）画出△ABC关于x轴对称的△A′B′C′．【考点】作图﹣轴对称变换．【专题】作图题．【分析】（1）根据平面直角坐标系写出即可；（2）根据关于原点对称的点的横坐标与纵坐标都互为相反数解答；（3）利用三角形所在的矩形的面积减去四周三个直角三角形的面积，列式计算即可得解；（4）根据网格结构找出点A、B、C关于x轴的对称点A′、B′、C′的位置，然后顺次连接即可．【解答】解：（1）点C的坐标是（﹣3，﹣2）；（2）点B关于原点的对称点的坐标是（1，﹣3）；（3）△ABC的面积=6×6﹣×2×5﹣×1×6﹣×4×6，=36﹣5﹣3﹣12，=36﹣20，=16；（4）如图所示，△A′B′C′即为所求作的三角形．故答案为：（1）（﹣3，﹣2），（2）（1，﹣3），（3）16．【点评】本题考查了利用轴对称变换作图，平面直角坐标系的相关知识，熟练掌握网格结构，准确找出对应点的位置是解题的关键．20．已知：如图，AB是⊙O的直径，⊙O过AC的中点D，DE切⊙O于点D，交BC 于点E．（1）求证：DE⊥BC；（2）如果CD=4，CE=3，求⊙O的半径．【考点】切线的性质；圆周角定理；相似三角形的判定与性质．【专题】几何综合题；压轴题．【分析】本题由已知DE是⊙O的切线，可联想到常作的一条辅助线，即“见切点，连半径，得垂直”，然后再把要证的垂直与已有的垂直进行联系，即可得出证法．【解答】（1）证明：连接OD，（1分）∵DE切⊙O于点D，∴DE⊥OD，∴∠ODE=90°，（2分）又∵AD=DC，AO=OB，∴OD是中位线，∴OD∥BC，∴∠DEC=∠ODE=90°，∴DE⊥BC；（4分）（2）解：连接BD，（5分）∵AB是⊙O的直径，∴∠ADB=90°，∴BD⊥AC，∴∠BDC=90°，又∵DE⊥BC，Rt△CDB∽Rt△CED，（7分）∴，∴BC=，（9分）又∵OD=BC，∴OD=，即⊙O的半径为．【点评】命题立意：此题主要考查圆的切线的性质、垂直的判定、圆周角的性质、三角形相似等知识．四、应用题21．初三年（4）班要举行一场毕业联欢会，主持人同时转动下图中的两个转盘，由一名同学在转动前来判断两个转盘上指针所指的两个数字之和是奇数还是偶数，如果判断错误，他就要为大家表演一个节目；如果判断正确，他可以指派别人替自己表演节目．现在轮到小明来选择，小明不想自己表演，于是他选择了偶数．小明的选择合理吗？从概率的角度进行分析（要求用树状图或列表方法求解）【考点】列表法与树状图法．【专题】应用题．【分析】依据题意先用列表法或画树状图法分析所有等可能的出现结果，然后根据概率公式分别求出两个数字之和是奇数与是偶数的概率，根据概率的大小即可判断小明的选择是否合理．【解答】解：小明的选择不合理；列表得234635679578911810111214∴共出现12中等可能的结果，其中出现奇数的次数是7次，概率为，出现偶数的次数为5次，概率为，∵，即出现奇数的概率较大，∴小明的选择不合理．【点评】本题考查的是用列表法或画树状图法求概率．列表法或画树状图法可以不重复不遗漏的列出所有可能的结果，适合于两步完成的事件．注意哪个概率大，选择哪个的可能性就大．用到的知识点为：概率=所求情况数与总情况数之比．22．如图，在一块如图所示的三角形余料上裁剪下一个正方形，如果△ABC为直角三角形，且∠ACB=90°，AC=4，BC=3，正方形的四个顶点D、E、F、G分别在三角形的三条边上．求正方形的边长．【考点】相似三角形的判定与性质；勾股定理；正方形的性质．【专题】压轴题．【分析】作辅助线：作CH⊥AB于H，由四边形DEFG为正方形，可得CM⊥GF与求得AB、CH的值，还可证得△ABC∽△GFC，由相似三角形对应高的比等于相似比，即可求得正方形的边长．【解答】解：作CH⊥AB于H，∵四边形DEFG为正方形，∴CM⊥GF，由勾股定理可得：AB=5，根据三角形的面积不变性可求得CH=，设GD=x，∵GF∥AB，∴∠CGF=∠A，∠CFG=∠B，∴△ABC∽△GFC，∴，即，整理得：12﹣5x=x，解得：x=，答：正方形的边长为．【点评】此题考查了相似三角形的判定与性质与直角三角形、正方形的性质．注意相似三角形对应高的比等于相似比定理的应用与数形结合思想与方程思想的应用．五、解答题（本题12分）23．已知：如图所示的一张矩形纸片ABCD（AD＞AB），将纸片折叠一次，使点A 与C重合，再展开，折痕EF交AD边于E，交BC边于F，分别连接AF和CE．（1）求证：四边形AFCE是菱形；（2）若AE=10cm，△ABF的面积为24cm2，求△ABF的周长；（3）在线段AC上是否存在一点P，使得2AE2=AC•AP？若存在，请说明点P的位置，并予以证明；若不存在，请说明理由．【考点】菱形的判定；勾股定理；矩形的性质；相似三角形的判定与性质．【专题】压轴题；开放型；存在型．【分析】（1）因为是对折所以AO=CO，利用三角形全等证明EO=FO，四边形便是菱形；（2）因为面积是24，也就是AB、BF的积可以求出，所以求周长只要求出AB、BF 的和就可以，而结合勾股定理它们和的平方减去乘积二倍就是AF的平方；（3）因为AC=AO所以可以从与△AOE相似的角度考虑，即过E作EP⊥AD．【解答】（1）证明：连接EF交AC于O，当顶点A与C重合时，折痕EF垂直平分AC，∴OA=OC，∠AOE=∠COF=90°（1分）∵在矩形ABCD中，AD∥BC，∴∠EAO=∠FCO，∴△AOE≌△COF（ASA）．∴OE=OF（2分）∴四边形AFCE是菱形．（2）解：四边形AFCE是菱形，∴AF=AE=10．设AB=x，BF=y，∵∠B=90，∴（x+y）2﹣2xy=100①又∵S△ABF=24，∴xy=24，则xy=48．②（5分）由①、②得：（x+y）2=196∴x+y=14，x+y=﹣14（不合题意舍去）∴△ABF的周长为x+y+AF=14+10=24．（7分）（3）解：过E作EP⊥AD交AC于P，则P就是所求的点．（9分）证明：由作法，∠AEP=90°，由（1）得：∠AOE=90°，又∠EAO=∠EAP，∴△AOE∽△AEP，∴=，则AE2=AO•AP∵四边形AFCE是菱形，∴AO=AC，AE2=AC•AP（11分）∴2AE2=AC•AP即P的位置是：过E作EP⊥AD交AC于P．【点评】本题主要考查（1）菱形的判定方法“对角线互相垂直且平分的四边形”，（2）相似三角形的判定和性质．六、解答题（本题12分）24．某开发公司现有员工50名，所有员工的月工资情况如下表：员工管理人员普通工作人员人员结构总经理部门经理科研人员销售人员高级技工中级技工勤杂工员工数/名1423223每人月工资/元2100084002025220018001600950请你根据上述内容，解答下列问题：（1）该公司“高级技工”有15 人；（2）该公司的工资极差是20050 元；（3）小张到这家公司应聘普通工作人员，咨询过程中得到两个答案，你认为用哪个数据向小张介绍员工的月工资实际水平更合理些？（4）去掉最高工资的前五名，再去掉最低工资的后五名，然后算一算余下的40人的平均工资，说说你的看法．【考点】中位数；加权平均数；众数；极差．【专题】压轴题；图表型．【分析】（1）高级技工人数=总数﹣各类员工人数；（2）根据极差=最大值﹣最小值计算即可；（3）先求出平均数，中位数和众数，再继续判断；（4）去掉最高工资的前五名，再去掉最低工资的后五名，再根据加权平均数的公式：计算即可．【解答】解：（1）50﹣1﹣4﹣2﹣3﹣22﹣3=15人（2分）（2）21000﹣950=20050元（4分）（3）员工的说法更合理些．这组数据的平均数是2606元，中位数是1700元，众数是1600元由于个别较大数据的影响，平均数不能准确地代表平近水平，此时中位数或众数可以较好的反映工资的平均水平，因此员工的说法更合理一些．（9分）（4）（元）这样计算更能代表员工的平均工资水平．【点评】本题为统计题，考查极差、平均数、众数与中位数的意义．极差是指一组数据中最大数据与最小数据的差．中位数是将一组数据从小到大（或从大到小）重新排列后，最中间的那个数（或最中间两个数的平均数），叫做这组数据的中位数．如果中位数的概念掌握得不好，不把数据按要求重新排列，就会出错．七、计算题（本题12分）25．某软件公司开发出一种图书管理软件，前期投入的开发广告宣传费用共50000元，且每售出一套软件，软件公司还需支付安装调试费用200元．（1）试写出总费用y（元）与销售套数x（套）之间的函数关系式．（2）如果每套定价700元，软件公司售出多少套可以收回成本？（3）某承包商与软件开发公司签订合同，买下公司生产的全部软件，但700元的单价要打折，并且公司仍然要负责安装调试．如果公司总共可生产该软件1500套，并且公司希望从这个软件项目上获得不少于280000元的利润，最多可以打几折？【考点】一次函数的应用．【专题】销售问题．【分析】（1）由题意得；总费用=广告宣传费+x套安装调试费．可得出函数关系式；（2）根据每套定价700元，前期投入的开发广告宣传费用共50000元，且每售出一套软件，软件公司还需支付安装调试费用200元，即可得出等量关系，求出即可；（3）根据总利润以及打折运算，得出等式方程求出即可．【解答】解：（1）根据题意得：y=50000+200x．（2）设软件公司售出x套软件能收回成本，700x=50000+200x，解得：x=100，答：软件公司售出100套软件可以收回成本．（3）设该软件按m折销售时可获利280000元，由题意可得：（700×﹣200）×1500=280000+50000，解得：m=6，答：公司最多可以打6折．【点评】此题主要考查了一元一次方程的应用以及打折问题，利用已知条件得出等量关系是解决问题的关键．八、计算题（本题14分）26．如图，抛物线y=x2﹣4x﹣1顶点为D，与x轴相交于A、B两点，与y轴相交于。

水力学模拟试题及参考答案

水力学模拟试题及答案（一）1、选择题：（每小题2分）（1）在水力学中，单位质量力是指（）a、单位面积液体受到的质量力；b、单位体积液体受到的质量力；c、单位质量液体受到的质量力；d、单位重量液体受到的质量力。

答案：c（2）在平衡液体中，质量力与等压面（）a、重合；b、平行c、相交；d、正交。

答案：d（3）液体中某点的绝对压强为100kN/m2，则该点的相对压强为a、1 kN/m2b、2 kN/m2c、5 kN/m2d、10 kN/m2 答案：b（4）水力学中的一维流动是指（）a、恒定流动；b、均匀流动；c、层流运动；d、运动要素只与一个坐标有关的流动。

答案：d（5）有压管道的管径d与管流水力半径的比值d /R=（）a、8；b、4；c、2；d、1。

答案：b（6）已知液体流动的沿程水力摩擦系数与边壁相对粗糙度和雷诺数Re都有关，即可以判断该液体流动属于a、层流区；b、紊流光滑区；c、紊流过渡粗糙区；d、紊流粗糙区答案：c（7）突然完全关闭管道末端的阀门，产生直接水击。

已知水击波速c=1000m/s，水击压强水头H = 250m，则管道中原来的流速v0为a、1.54m b 、2.0m c 、2.45m d、3.22m答案：c（8）在明渠中不可以发生的流动是（）a、恒定均匀流；b、恒定非均匀流；c、非恒定均匀流；d、非恒定非均匀流。

答案：c（9）在缓坡明渠中不可以发生的流动是（）。

a、均匀缓流；b、均匀急流；c、非均匀缓流；d、非均匀急流。

答案：b（10）底宽b=1.5m的矩形明渠，通过的流量Q =1.5m3/s，已知渠中某处水深h = 0.4m，则该处水流的流态为a、缓流；b、急流；c、临界流；答案：b（11）闸孔出流的流量Q与闸前水头的H（）成正比。

a、1次方b、2次方c、3/2次方d、1/2次方答案：d（12）渗流研究的对象是（）的运动规律。

a、重力水；b、毛细水；c、气态水；d、薄膜水。

答案：a（13）测量水槽中某点水流流速的仪器有a、文丘里计b、毕托管c、测压管d、薄壁堰答案：b（14）按重力相似准则设计的水力学模型，长度比尺λL=100，模型中水深为0.1米，则原型中对应点水深为和流量比尺为a、1米，λQ =1000；b、10米，λQ =100；c、1米，λQ =100000；d、10米，λQ=100000。

2023年保安员(初级)考试模拟100题及答案(一)

2023年保安员（初级）考试模拟100题及答案1、【单选题】25岁的小张一直没有找到工作，于是就想通过特殊的方法搞点零花钱。

一天他在一条偏僻的小路上，用一把仿真枪拦住了路过此地的小李，向小李索要财物，小李不给，于是小张挥拳将小李打伤，并拿走了小李身上的500元钱。

小张的行为属于（）（ C ）A、抢夺罪B、盗窃罪C、抢劫罪D、故意伤害罪2、【单选题】一般来说，公共场所对被检人进行人像比对，主要指的是（）等有效证件与本人的吻合度。

（ C ）A、工作证B、执勤证C、身份证D、出入证3、【单选题】下列不属于人身安全检查的重点对象的是（）（ A ）A、上级要求免检的人员B、伪装镇静者C、假献殷勤者D、言行蛮横的女性4、【单选题】下列不属于保安巡逻实施的操作规程内容的是（）.（ C ）A、徒步巡逻应两人以上进行B、保安员在巡逻中发现可疑情况应认真观察，严密监视C、车巡是保安员实施巡逻勤务的基本形式D、保安员在巡逻时，要提高警惕，保护自身安全5、【单选题】下列不属于出入口控制系统日常维护保养的基本内容的是（）（ D ）A、定期对门禁主板等部件除尘B、定期检查各设备的连接线是否良好C、定期对数据进行备份D、管理软件不应安装到系统盘6、【单选题】下列不属于单位的消防安全义务的是（）（ D ）A、保护消防设施、预防火灾B、实行每日防火巡查C、对职工进行岗前消防安全培训D、灾应立即报警,等待救援7、【单选题】下列不属于规范保安服务业发展“五统一原则的是（）（ C ）A、统一领导B、统一审批C、统一装备D、统一经营8、【单选题】下列不是交通事故现场保护方法的是（）.（ D ）A、撤销现场保护、清扫交通事故现场，必须征得公安消防监督机关的同意B、及时划定保护范围C、疏导交通D、寻找目击证人9、【单选题】下列不符合武装押运突发事件处置要求的是（）（ D ）A、来不及向公司报告时,事后应及时报告B、根据事件涉及范围,采取有效措施C、根据事件复杂程度,及时报告D、发现有人靠近车辆,应立即鸣枪示警10、【单选题】下列关于保安员对火灾的处置方法，正确的是（）（ A ）A、组织人员进行先期扑救，疏散人员，抢救伤员B、调查起火原因，抓捕贵任人C、及时进入现场取证D、先保护客户单位的贵重财物，然后抢救伤员11、【单选题】下列叙述中，（）不属于瞭望岗岗位职责。

(完整word版)《应用写作》模拟试题1及答案

《应用写作》模拟试题1及答案一、填空题（每题1分，共10分）1. 针对特定事实材料展开论述从而表明自己观点、见解的一种公务员考试文体叫_______ 。

2．竞聘报告针对的是某一岗位，使用_______人称，向组织和群众介绍自己，展示自己，推荐自己。

3．所谓调查报告，就是根据_________ 的成果写成的书面报告。

4．好文章是改出来的，具体的修改方法可用__________ 几个字来概括。

5．用于向国内外宣布重要事项或者法定事项的公文文种是___________ 。

6．计划的主体部分要说明__________等内容。

7．公文的标题一般由__________部分组成。

8．公文的__________ 是指从文件中抽象出来，能反映公文主要内容的规范化词汇。

9．请示一般只写一个主送机关，需要同时送其他机关的，应当用__________ 形式。

10．《经济合同》第107条规定：“当事人一方不履行合同义务或者履行合同义务不符合约定的，应当承担继续履行、采取补救措施或者赔偿损失等__________。

”二、判断题（每题1分，共10分）（在每小题后面，对的打√，错的打×）1．会议简报和会议通知一样，也是公文。

2．向上级机关行文，不可以使用通告。

3．每份公文，都必须经过审核这个程序。

4．向上级部门请求指示或批准只能用请示。

5．当事人订立合同，只能用书面形式。

6．写总结不一定要按照完成工作的时间先后顺序来写。

7．公文的成文日期以发出日期为准。

8．在汇报工作、提出建议的工作报告中，可以随带写请示的事项。

9．有些协议书可以当作合同来使用。

10．联合行文，要标明各机关的发文字号。

三、单项选择题（每题1分，共10分）（在空白处上写选项英文字母即可）1. 应用写作的文面规矩一般包括等项内容。

A 主旨、材料、结构、表达方式B 结构、标点符号、表达方式、文章修改C 行款格式、文字书写、标点符号、文章修改2. 《国家行政机关公文处理办法》（国发[2000]23号）第二章规定，行政机关的公文种类主要有种。

C考试模拟题1及参考答案

考试模拟题1及参考答案考试模拟题1一、单项选择题（共20题，每题1分，共20分。

）1. 以下叙述不正确的是。

A. 一个C源程序可由一个或多个函数组成B. 在C程序中注释说明只能位于一条语句的后面C. C程序的基本组成单位是函数D. 一个C源程序必须包含一个main函数2. 若变量已正确定义并赋值，表达式（）不符合C语言语法。

A. 3%2.0B. a*b/cC. 2, bD. a/b/c3. 六种基本数据类型的长度排列正确的是（）。

A. bool=char<int≤long=float<doubleB. char<bool=int≤long=float<doubleC. bool<char<int<long<float<doubleD. bool<char<int<long=float<double4. 下面程序段的运行结果是（）。

char a[7]= "abcdef",b[4]= "ABC";strcpy(a,b);printf("%c",a[5]);A. 空格B. \0C. eD. f5. 设int a=9,b=8,c=7,x=1;则执行语句if(a>7) if(b>8) if(c>9)x=2;else x=3;后x的值是（）。

A. 2B. 1C. 0D. 36. 对以下程序，当输入数据的形式为12a345b789↙，正确的输出结果为（）。

int main(){char c1,c2;int a1,a2;c1=getchar(1); scanf("%2d",&a1);2c2=getchar(a); scanf("%3d",&a2);345printf("%d,%d,%c,%c\n",a1,a2,c1,c2); ,,,return 0;}A. 12,345,a,bB.C. 2a,45b,1,3D. 2,789,1,a7. 以下程序的输出结果是：（）。

2023年动力值守人员技术能力等级模拟题1试题及答案

2023年动力值守人员技术能力等级模拟题1试题及答案一、单选题（每题1分，合计50分）1.用数字万用表的红表笔接开关电源的正极，黑表笔接负极，开关电源正在浮充状态，万用表可能显示以下哪个电压值（） [单选题] *A.-53.5B.53.5(正确答案)C.-48D.482. 低压三相交流电的A、B、C三相任意2根火线之间的电压为（）V。

[单选题] *A.220B.380(正确答案)C.400D.03. 在通信机房中使用的为三相五线制，分别为A相、B相、C相、零线和保护地线，其色标按顺序为：黄、绿、红、蓝、( )。

[单选题] *A.黄绿(正确答案)B.红蓝C.黑色D.褐色4．值班的时候看到生产楼的灯全部灭了，过了一两秒钟又亮了，以下原因中最可能的原因是（）。

[单选题] *A. 市电停电双路市电自动切换(正确答案)B. 市电停电后切换到油机供电C. 油机供电切换到市电供电D. UPS转旁路供电5.三相交流电火线之间的电压为线电压，线电压等于相电压的（）倍。

[单选题] *A. 1B. 1.5C.D.(正确答案)6. 电流通过人体时，破坏人体内细胞的正常工作，主要表现为（） [单选题] *A.生物学效应(正确答案)B.热效应C.化学效应D.机械效应7.（）是电流对人体内部组织的伤害，是最危险的一种伤害，绝大多数（约85%以上）的触电死亡事故都是由它造成的。

[单选题] *A.电击(正确答案)B.电伤C.烧伤D.电离8.有高压10KV电缆掉落在地上，如果人走到电缆接地点附近，会造成（） [单选题] *A.单相触电B.两相触电C.三相触电D跨步电压触电(正确答案)9.以下不能提供交流电源的设备是（） [单选题] *A.开关电源(正确答案)B.柴油发电机组C.UPSD.逆变器10.以下设备的结构中，不包含有整流器的是（） [单选题] *A.开关电源B.UPSC.逆变器(正确答案)D.336V高压直流电源11.如果蓄电池单体标称的浮充电压是2.23V，48V开关电源的浮充电压应设为（） [单选题] *A.48VB.53.5V(正确答案)C.53.8VD.54V12.以下哪种情况会导致开关电源输出电压升高（） [单选题] *A.均充(正确答案)B.浮充C.整流模块故障D.电池充电限流13.蓄电池组的均充周期一般设为（）天。

小学教育管理模拟试题一及参考答案

小学教育管理模拟试题一及参考答案一，单选题1、把“领导”概念引进管理领域的管理学派是A、古典管理学派；B、决策理论学派；C、系统理论学派；D、行为科学学派。

正确答案为：D2、古典组织理论的创立者是A、泰罗；B、法约尔；C、韦伯；D、巴纳德。

正确答案为：B3、社会系统学派的创立人是A、巴纳德；B、西蒙；C、杜拉克；D、卡斯特莱。

正确答案为：A4、学校管理过程的中心环节是A、计划；B、实行；C、检查；D、总结。

正确答案为：B5、《有效的管理者》一书的作者是A、泰罗；B、杜拉克；C、巴纳德；D、西蒙。

正确答案为：B6、具有权威性，强制性等特点的学校管理方法是A、行政管理方法；B、经济管理方法；C、教育管理方法；D、目标管理方法。

正确答案为：A7、目前我国中小实行的领导体制是A、校长责任制；B、党委领导下的校长负责制；C、校长负责制；D、党委领导下的校长分工负责制。

正确答案为：C8、专家问卷调查法又称A、头脑风暴法；B、反向头脑风暴法；C、德尔菲法；D、哥顿法。

正确答案为：C9、根据管理方格理论，权威与服从型管理的特点是A、对职工和生产漠不关心。

；B、十分重视生产，把人的因素降至最低程度。

；C、十分关心人的因素，不直接抓生产目标的落实。

；D、兼顾职工和生产因素。

正确答案为：B10、主张以系统的，动态的观点来理解和设计组织的组织理论属于A、X理论；B、Y理论；C、Z理论（权变理论）；D、W理论正确答案为：C二，多项选择题1、管理的自然属性表现在（）。

A、管理的普遍性；B、管理的共同性；C、管理的技术性；D、管理的政治性；E、管理的历史继承性。

正确答案为：ABC2、法约尔认为完整的管理过程应包括的职能活动有（）。

A、计划；B、组织；C、指挥；D、协调；E、控制。

正确答案为：ABCDE3、目标的特性有（）。

A、指向性；B、社会性；C、共同性；D、可行性；E、层次性。

正确答案为：ABDE4、学校管理过程的基本环节有（）。

自考英语平台模拟题(作业一)及答案

自考英语（二）平台模拟试题及答案（作业一）（课程代码：00015）1.单选题1.1 He ( A ) a reward for his hard work.A.DeservedmandedC.Accessedmitted1.2 It was not until he arrived at the station (B ) he realized he had forgotten his ticket.A.ThereB.ThatC.thenD.where1.3 The millions of calculations involved, had they been done by hand, ( ) all practical value by the time they were finished.A.could loseB.would have lostC.might loseD.ought to have lost1.4 Only after several attempts (B ) the door.A.did he openedB.did he openC.he openedD.he did open1.5 We couldn't (C ) the enemy's strength,because they had made good preparations.A.overestimateB.predictC.underestimateD.emphasize1.6 He had time to spend on other things that seemed more( A).A.worthwhileB.worthC.worthyD.worthing1.7 The teacher recommended that Jack (D ) maths or physics instead of English because he was quick at numbers.A.must studyB.could studyC.studiedD.study1.8 In China,grandmothers play an invaluable ( B) in taking care of children and households while the young parents are at work.A.sectionB.roleC.shareD.obligation1.9 Radios,telephones and telegraphs are means ( D) man has extended the range of his senses of hearing and speech.A.by thatB.with whichC.with thatD.by which1.10 Through my association with Americans during the past six years,l had gradually ( D) some of their ways.A.impliedB.impactedC.remainedD.adopted1.11 The police offered (B ) for information about the stolen painting.A.a rewardB.an awardC.a profitD.a prize1.12 I (A ) my visit short by three weeks and came back to the United States.A.cutB.setC.putD.let1.13 We( A )your efforts for the development of the companyA.appreciateB.enjoyableC.dramaticD.stumble1.14 lt is (B ) that no one feels like working.A.a so cold dayB.such a cold dayC.such cold a dayD.a such cold day1.15 All children must, (C ) law, receive fulltime education between the ages of five and sixteen.A.onB.withC.byD.for1.16 Most insurance agents would rather you ( D) anything about collecting claims until they investigate the situation.A.doB.don’t doD.didn’t do1.17 lt is appropriate that some time ( D) thorough study of the results of the Apollo mission.A.devotes toB.devoted toC.is devoted toD.be devoted to1.18 Some linguists think that children are (B ) an ability to learn and use a language.A.bear withB.born withC.born forD.bear to1.19 They want women to be paid just (A ) much as men for the same work.A.asB.likeC.so1.20 (B ) more careful,his ship would not have sunk.A.if the captain wereB.had the captain beenC.should the captain beD.if the captain would have been1.21 The job ( B) my living in London.A.includedB.involvedC.containedD.had1.22 The flight was cancelled ( B) the fog.A.look likeB.due toC.insist onD.hold up1.23 Thank you for reminding me of the time,or l (D ) late yesterday.-Don't mention it.A.should beB.would beC.will have beenD.would have been1.24 (C ) that he wasn't able to come,l wouldn't have sent him the invitation letter.A.since i had knownB.did i knowC.had i knownD.if i knew1.25 Jack drew a ( A) sun and a pale moon in the same picture.A.brightB.lightC.clearD.clean1.26 The Western and Oriental values are found to be in ( A) in learning English.A.confrontationB.contactC.violenceD.contrast1.27 ln some countries,animals are sacrificed ( C) a god.A.forB.inC.toD.on1.28 We ( A) football on Sundays.A.are not supposed to playB.are not supposed to playingC.don’t suppose to playD.don’t suppose to playing1.29 Were it not for the snowy weather, we ( D) all right.A.wereB.would beC.may beD.would have been1.30 A good friend of mine from ( C) l was born showed up at my home right before l left for BeijingA.howB.whomC.whenD.which1.31 Our tragedy today is a general and universal physical fear ( ) long sustained by now that we can even bear it.A.soB.suchC.tooD.very1.32 lt was yesterday ( ) Mary met John in the park.A.thatB.whyC.whenD.how1.33 The work unit is more like a large family,where the youngest workers feet at ( A) with the "mom" and "dad" of the group.A.easeB.workC.familypany1.34 With a lot of difficult problems (A ) ,the manager felt like a cat on hot bricks.A.to settleB.settlingC.settledD.being settled1.35 lf your words are not consistent with your body language.your mixed messages are (A ) confuse your interviewers.A.bound toB.bound forC.certainly toD.certainly for1.36 He is so caring and (C ) and he makes me feel like that l don't deserve him.A.dramaticB.enjoyableC.considerateD.effective1.37 He ( A) history when he was an undergraduate.A.majored inB.is majored inC.majored onD.is majored on1.38 l became uncomfortable and confused (A ) they were behaving that way.A.as to whyB.as for whyC.as to thatD.as for that1.39 The approach of the winter time, as the days grew shorter and colder and the sun seemed to threaten to disappearentirely,(C ) a time of fear.A.isB.areC.wasD.were1.40 A university program for undergraduates usually takes four years.In this way,.a university and a college are (B ) .A.likeB.alikeC.likelyD.likeable1.41 He finds it hard to( D )his thought on one thing for longer than five minutes.A.tossB.fallC.acD.focus1.42 A school system should be one in which the love of learning,rather (B) the acquisition of facts,is cultivated.A.toB.thanC.forD.off1.43 lf you have been keeping track of your anger,you know what sets you (A ) .A.offB.onC.outD.in1.44 The meeting has been ( ) .A.called forB.called downC.called backD.called off1.45 Studies have found that high levels of anger and hostility are (D ) to greater risks of heart disease, poor immune responses, and even a tendency to get fat.A.acquiredB.advancedC.desertedD.related1.46 All over the world,the mention of English education suggests a picture of public schools",and it suggests ( B) the names of certain very famous instructions—Eton, Oxford and Cambridge.A.in factB.in particularC.in deedD.as a matter of fact1.47 l believe that rumor( A )from what you said yesterday.A.originatedB.decoratedC.glidedD.painted1.48 You may not like Thomas,but he has his ( ) .A.meritsB.goodC. advantagesD.feelings1.49 Please let me know if any difficulties (A ) .A.ariseB.haveC. comeD.happen1.50 For breakfast he only drinks juice from fresh fruit (A ) on his own farm.A.grownB.being grownC.to be grownD.to grow。

(3+证书)电工考证综合模拟题及答案(一)

广东省中等职业技术教育专业技能课程考试电工模拟题（一）一、单项选择题：（本大题共25小题，每小题2分，共50分）在每小题列出的四个备选项中只有一个是符合题目要求的，请将其代码填写在题后的括号内。

错选、多选或未选均不得分。

题目 1 2 3 4 5 6 7 8 9 10 11 12 13 答案题目14 15 16 17 18 19 20 21 22 23 24 25答案1、如图八所示，使用滑动变阻器时，当：A、连接在A、B之间，滑动触头向右滑动时电阻减小B、连接在A、D之间，滑动触头向右滑动时电阻减小C、连接在C、B之间，滑动触头向右滑动时电阻减小D、连接在C、D之间，滑动触头向右滑动时电阻减小2、使用电阻箱时，各调节旋钮的位置如图九所示，这时两接线柱之间的电阻值是：A、4750.3ΩB、9999.9ΩC、47503ΩD、99999Ω3、无“OFF”档的万用表，使用完时应将转换开关置于：A、电阻最大档B、电流最大档C、交流电压最大档D、交流电压最小档4、下面关于电容器电容C的叙述，正确的是：A、若电容器不带电，则电容C为零B、电容器两极板之间的电压越高，电容C越大C、公式C=Q/U说明，电容C与Q成正比，与U成反比D、对于一个确定的电容器来说，Q/U是不变的值5、如图十所示，已知UAB =6V，则B点的电位VB为：A、6VB、-6VC、0VD、不能确定6、如图十一所示的电路中，A、B之间的电阻RAB是：A、3ΩB、6ΩC、9ΩD、10Ω7、将满偏电流为1mA，内电阻为1KΩ的毫伏表改装成10V的电压表，应当串联的分压电阻的阻值是：A、1KΩB、10KΩC、9KΩD、19KΩ是：8、如图十二所示电路中，E1=10V，E2=6V，R=2Ω，I=2A，则电压UABA、4VB、8VC、12VD、24V9、如图十三所示电路，电压表的读数U=10V，电流表的读数为I=0.1A，若电流表的内阻R=40Ω，则电阻R的大小为：A、60ΩB、100ΩC、140ΩD、400Ω的电流是：10、如图十四所示的电路中，通过电阻RLA、2AB、-2AC、5AD、- 5A获得最大功率时，其电阻值为：11、如图十五所示的电路中，当负载RLA、4ΩB、6ΩC、12ΩD、18Ω12、如图十六所示的电路中，每个电阻的阻值均为R，输入端A、B的电压U1=6V时，输出端C、D的电压U2的大小为：A、1VB、2VC、3VD、6V13、若i=10sin(628t+30°)A，则t=0时i的瞬时值为：A、5AB、52AC、53AD、10A14、关于点电荷，下列说法正确的是：A、带电量较大的点电荷对带电量较小的点电荷的作用力大于带电量较小的点电荷对带电量较大的点电荷的作用力B、两个点电荷带电的种类相同时，它们相互吸引C、两个点电荷带电的种类相同时，它们相互排斥D、两个点电荷相互作用力的大小与它们之间的距离无关15、如图十七所示电路中，若将电源的频率降低，电源的电压不变，则V1、V2表的读数变化情况为： A 、V1、V2均不变 B 、V1变小、V2变大 C 、V1变大、V2变小 D 、V1不变、V2变大16、如图十九所示的电路，网孔①按图示的绕行方向，列出的KVL 方程正确的是： A 、I 1(R 1+R 4)+I 2R 2 =E 1+E 2 B 、I 1(R 1+R 4)-I 2R 2=E 1-E 2 C 、I 1(R 1+R 4)-I 2R 2 =E 1+E 2 D 、I 1(R 1+R 4)+I 2R 2 =E 1-E 217、三个电容器的电容量C1＞C2＞C3，将它们串联接入适当的电源上，则它们所带电荷量的关系是： A 、Q1=Q2=Q3 B 、Q1＞Q2＞Q3 C 、Q1＜Q2＜Q3 D 、Q1+Q2+Q3=0 18、某电路的电流、电压的波形如图十八所示，则此电路为： A 、纯电阻电路 B 、纯电感电路 C 、电容性电路 D 、电感性电路 19、某交流电路，若R=4Ω，X=3Ω，则此电路的功率因数为： A 、0.6 B 、0.75 C 、0.8 D 、120、中性点接地的三相四线制供电系统，线电压指： A 、相线间的电压 B 、零线对地间的电压C 、相线与零线间的电压D 、相线对地间的电压 21、如图十五所示正弦交流电压的初相位为： A 、-30° B 、30° C 、60° D 、90°22、对称负载作三角形连接的三相电路，若一相的功率为100W ，则电路的总功率为： A 、100W B 、1003W C 、300W D 、3003W23、物理量电能的单位是： A 、瓦特 B 、焦耳 C 、伏安 D 、乏24、如图十六所示电路中，理想电流源I S =2A ，电阻R=5Ω，R 的端电压为： A 、5V B 、10V C 、20V D 、30V25、对称三相负载作星形连接，每相的电流是2A ，若有中性线，则中性线的电流为：A 、0AB 、2AC 、23AD 、6A二、多项选择题：本大题共5小题，每小题2分，共10分。

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