中国石油大学(华东)《数据采集系统》2015年春学期在线作业(一)答案

石油华东《安全工程信息化技术》2015年春学期在线作业一、单选题（共5 道试题，共50 分。

）V 1. 在安全信息中安全指令信息是（）。

A. 安全活动的依据B. 安全活动的措施C. 安全活动的效绩D. 以上都不是满分：10 分2. 以下对于关系模型中关系性质的描述不正确的是（）。

A. 列顺序可任意交换,行顺序也可任意交换B. 列之间的名字和对应的域均不可相同C. 每一关系具有唯一主关键字D. 关系中的列是同质的满分：10 分3. 蒙特卡罗方法用于计算机仿真的原理是，某事件的概率可以用大量实验中该事件发生的（）进行估算。

A. 条件B. 频率C. 后果D. 以上都不是满分：10 分4. 以下有关数据库E-R模型的描述正确的是（）。

A. E-R可以为计算机直接应用B. 实体用椭圆框表示C. 联系可以具有属性D. 实体的取值范围称为域满分：10 分5. 以下关于有限元分析方法的描述不正确的是（）。

A. 有限元方法属于计算机辅助工程的一种方法B. 有限元方法是将复杂问题离散成有限个简单单元进行近似求解C. 有限元模型中的节点都是独立无关的D. 有限单元法属于数值模拟方法满分：10 分二、多选题（共5 道试题，共50 分。

）V 1. 计算机辅助工程(CAE)分析问题的三个阶段为（）。

A. 模型修正B. 前处理C. 分析求解D. 后处理满分：10 分2. 虚拟仪器开发硬件系统的基本配置方案为（）。

A. 计算机B. I/O接口C. 网络D. 移动存储设备满分：10 分3. 依据安全信息的产生及其作用的不同，安全信息大致可分为（）。

A. 安全指令信息B. 安全管理信息C. 事故信息D. 安全指标信息满分：10 分4. 建立数据模型必须满足三个要求为（）。

A. 比较真实的模拟现实世界B. 容易为人所理解C. 易于求解D. 便于计算机上实现满分：10 分5. 计算机仿真方法的独特作用包括（）。

A. 优化系统设计B. 减少失败风险C. 降低实验成本D. 提高预测能力满分：10 分。

XXX《信息系统集成与应用开发》2015年春学期在线作业(一)答案1.具有挖沟成本高、难以安排电缆的敷设位置、难以更换和加固等缺点的建筑群子系统布线方案是（）。

A.架空B.直埋C.管道内D.隧道正确答案：B2.既能保持建筑物的外貌，又能随时铺设电缆的建筑群子系统布线方案是指（）A.管道B.架空C.直埋D.隧道正确答案：C3.按离散的固定长度的块传输的网络交换技术是下面的哪一种（）A.帧中继B.分组交换C.数字数据网D。

ATM网正确答案：D4.在企业信息化发展的过程中出现了一些困境，这些困境在以下选项中不包括（）A。

IT“黑洞”B.生产率悖论C.数据贫乏D.信息孤岛正确答案：C5.用户设备与信息插座之间的连接线缆及部件是（）。

A.干线子系统B.办理子系统C.工作区子系统D.水平布线子系统正确答案：C6.意大利面条式企业应用系统的的缺点是（）A.信息维护困难、维护成本高B.信息缺乏C.上层环节获得数据不能准确、及时地传递给下层环节D.管理层不能及时获得业务层的信息正确答案：A7.数据堆栈的数据组织中，简朴、花费少、用户利用灵活的数据组织是（）A.虚拟存储方式B.基于关系表的存储C.多维数据库存储方式D.元数据存储正确答案：A8.最适宜于穿墙和为墙角的网络传输介质是（）A.粗同轴电缆B.细同轴电缆C.双绞线D.光纤正确答案：C9.（）是网络的中枢神经，是网络信息传输的载体。

A.传输子系统B.交换子系统C.接入子系统D.布线子系统正确答案：D10.网络集成中网络的核心是（）A.网络传输B.网络交换C.网络布线D.网络测试正确答案：A11.异构数据集成原型系统得核心是（）。

A.数据源层B.集成层C.界面层D.服务器层正确答案：B12.放大输入的信号，调整信号时间，在所有电线敷设门路上重新产生信号，以上是（）的功用。

A.中继器B.网络接口卡C.集线器D.网桥正确答案：A13.粗同轴电缆10Base-5中10指（）A.最高速率10MbpsB.最大长度10mC.带的类型D.线缆的类型正确答案：A14.以下不属于网桥的功用的是（）。

中国石油大学(华东)石大在线2015春季学期《大学英语2》在线作业答案请注意：本学期您只有一次在线考试机会，请慎重做答和提交！01:25:48单项选择题第1题—Will you be able to come to my birthday party this Saturday? —______________ 本题2分A、No, I’d like to.B、I believe I can’t.C、I’m afraid.D、Yes, I’d love to.第2题—Do you mind telling me where you’re from? —_________. 本题2分A、Certainly. I’m from LondonB、Sure. I was born in LondonC、Not really, you can do itD、Certainly not. I’m from London第3题—I want to look up a new word. Could you lend me your dictionary? —____________ 本题2分A、Yes, I can.B、Here you are.C、Sorry, I don’t think so.D、You can take it.第4题—I’m sorry. Bob’s not in his office. —_________ 本题2分A、Would you like to leave a message?B、Are you sure for that?C、Can you take a message for me?D、Can you phone me?第5题It was with great joy ______ he received the news that his long lost son would soon return home. 本题1分A、soB、asC、thatD、since第6题The girl’s answer ______ good enough. 本题1分A、soundedB、noisedC、heardD、listened第7题Clothes and blankets have been __________ among the refugees. 本题1分A、distributedB、contributedC、attributedD、conducted第8题The man told his girl friend he would wait for her where the three roads __________. 本题1分A、linkB、connectC、meetD、combine第9题My house is very __________ for getting to work as it is only a few minutes from the station. 本题1分A、comfortableB、suitableC、convenientD、free第10题Our English teacher __________ our buying a good English-Chinese dictionary. 本题1分A、askedB、orderedC、suggestedD、required第11题So little ______ about chemistry that the lecture was completely beyond me. 本题1分A、I knowB、I knewC、do I knowD、did I know第12题I’d like to take ______ of this opportunity to thank you all for your co-operation. 本题1分A、profitB、benefitC、advantageD、occasion第13题______ only five minutes to finish the task. 本题1分A、I took myselfB、It required meC、It took meD、It needed me第14题If you spare half an hour each day to read an English newspaper, you will surely be able to read ______. 本题1分A、efficientlyB、obviouslyC、actuallyD、purposefully第15题They always kept on good __________ with their next-door neighbors for the children’s sake. 本题1分A、friendshipB、relationsC、relativesD、terms第16题There was a good __________ of the countryside from the front of the bus. 本题1分A、sightB、viewC、sceneD、scenery第17题I think we should let Maria go camping with her boyfriend. __________, she’s a big girl now. 本题1分A、After allB、Above allC、First of allD、For all第18题If you ever have the __________ to go abroad to work, you should take it. 本题1分A、possibilityB、offerC、luckD、chance第19题The current political __________ of our country is favorable for foreign investments. 本题1分A、climateB、weatherC、stateD、occasion第20题—Mum, it is nice weather. I want to skate this afternoon. —Don’t you think the ice on the lake is too thin to __________ your weight? 本题1分A、standB、bearC、catchD、take第21题__________ from the moon, our earth, with water __________ seven percent of its surface, appears as a “blue ball”. 本题1分A、Seen ... coveredB、Seeing ... coveringC、Seen ... coveringD、To see ... to cover第22题—Tom, this is Hack, Fred is ill in hospital. —Oh, _________ 本题2分A、it’s sad.B、it’s bad.C、I’m sorry to hear that.D、that’s not good.第23题—May I see the menu, please? I’ve been waiting an hour already. —_________. 本题2分A、That is the menu, sirB、Yes, please go onC、Here you are, sirD、Of course, sir第24题—You’ve given us a wonderful Chinese dinner, Mrs. Wang. —_________ 本题2分A、Oh, I don’t think I cooked very well.B、I’m glad you enjoyed it.C、Come again when you are free.D、It’s not necessary for you to say so.第25题—Have you ever been to the Great Wall in Beijing? —__________ 本题2分A、Yes, I amB、No, I don’t.C、No, I’ve never been there.D、Certainly, I went there.第26题—What is your major, Jack? —_______________ 本题2分A、I study very hard.B、I’m learning course.C、I major English.D、I’m majoring in computer science.第27题—You look tired. What’s the matter? —______________ 本题2分A、It doesn’t matter.B、Oh, my head aches badly.C、It is not the matter.D、Don’t worry.第28题Years ago we didn't know this, but recent science ______ that people who don't sleep well soon get ill. 本题1分A、showedB、has shownC、will showD、is showing第29题—What would you do if it ____ tomorrow? —We have to carry it on, since we’ve got everything ready. 本题1分A、rainB、is rainingC、will rainD、rains第30题The coffee is wonderful! It doesn’t taste like anything I _____ before. 本题1分A、was havingB、haveC、have ever hadD、had ever had第31题By the time Jane gets home, her aunt _______for London to attend a meeting. 本题1分A、will leaveB、leavesC、will have leftD、left第32题No passenger is allowed to stick his head out of the window lest he ______. 本题1分A、should be hurtB、is hurtC、will be hurtD、is to be hurt第33题I consider ______ that I should do my best to help them. 本题1分A、my dutyB、to be my dutyC、what my dutyD、it my duty第34题There was plenty of time. She ______. 本题1分A、mustn’t have hurriedB、needn’t have hurriedC、must hurryD、couldn’t have hurried第35题Shanghai is the place _____ the great Communist Party of China was born. 本题1分A、whichB、whereC、whenD、that第36题I am writing to ______ your appointment as Headmaster of the Grammar School. 本题1分A、congratulateB、congratulate onC、congratulate to you onD、congratulate you on第37题If you want his address, you will have to ______ the number in the book. 本题1分A、look intoB、look upC、look throughD、look after第38题This picture ______ me of the past events associated with my childhood. 本题1分A、remembersB、remindsC、recallsD、recollects第39题______ the flood, the ship would have reached its destination on time. 本题1分A、In case ofB、Because ofC、In spite ofD、But for第40题I sent invitations to 80 people, ______ have replied. 本题1分A、of whom only 20 of theseB、only 20 whoC、of 20 of these whoD、only 20 of whom阅读理解题第41题wall street is the name of a street in new york ａnd very famous in the whole world. it is the financial center of theu.s.a, exerting a significant influence upon the world’s economy. hetty green, who was born in 1835, was nicknamed the wizard（奇才）of wall street. she became almost a legendary figure in wall street, because she made a lot of money buying ａnd selling shares in companies.hetty green began making money when her father died ａnd she inherited all his money. by investing it wisely, shesoon built up her fortune to over 100 million dollars. however, she hated spending money on herself ｏr on her family. his leg, she would not send fｏr a doctｏr. she did not want to have to pay a doctｏr’s bill. she refused to send her son to a good hospital. instead, she took the boy to a free charity hospital. there he did not get very good treatment ａnd, to save his life, he had to have his leg cut off. still his mother would not pay fｏr proper hospital treatment. she sent fｏr a doctｏr who cut off the boy’s leg in her sitting room. it’s incredible, isn’t it?本题15分1．Wall Street is _______.A、the name of Chinatown in New YorkB、the nickname of New YorkC、the financial center of AmericaD、the tourist center of U.S.A2．Hetty Green was nicknamed the Wizard of Wall Street because she _______.3．The underlined word “mean”in the second paragraph probably can be replaced by ______.4．When her son broke his leg, Hetty Green _______.5．Which of the following is true according to the passage?A、Hetty Green died a poor old woman.B、Hetty Green preferred money to anything else.C、Hetty Green liked to earn a lot of money so as to live a good lifeD、hetty green hated her son ａnd refused to take him to a good hospital. A、sent him to a large hospitalB、sent for a doctor at onceC、didn’t pay the bill for the doctorD、took him to a charity hospitalA、sadB、cruelC、disappointedD、ungenerousA、made a great fortune with sharesB、inherited a large sum of money ｆrom her fatherC、built up a large company on sharesD、was very strange ａnd cruel第42题andy loved the idea. mary arthur 1 it. kurt mendez didn’t think it was any big deal. mr. el thought it was a brilliant idea. after all, it was 2 idea. “it’s only fair,”mr. el explained to his newfourth graders as they stood in line waiting for the lunch bell 3 , “that we turn things around. every year you guys line up in alphabetical order. alphabetical order to go to lunch, to go to gym, to go home, ａnd so on. this year we’re using reverse alphabetical order.”mindy vale put her hand down as mr. el pointed 4 her. “i’ve always had to stand at the back of the line, ever since kindergarten! now i’m near the 5. thank you, thank you!”ａthis policy. this is very drastic ａnd unnecessary. this could confuse our fragile young minds!”“put a lid on it, chris!”shouted david tyler. “we won’t have any outbursts like that, david!”mr. el said firmly. he turned 8 christopher. “don’t 9 , christopher. we only have strong minds in this class.”ａnds that went up were in the front half of the line. 本题20分1．第1题选项A、hatedB、likedC、heardD、needed2．第2题选项A、noB、thatC、hisD、her3．第3题选项A、ringB、to ringC、ringingD、rung4．第4题选项A、outB、forC、in5．第5题选项A、lastB、frontC、bottomD、forward6．第6题选项A、SoB、ThereforeC、ThenD、After7．第7题选项A、reconsiderB、carryC、thinkD、make8．第8题选项A、atB、inC、towardD、down9．第9题选项A、moveB、worryC、scream10．第10题选项A、expectB、doubtC、forgetD、review第43题people once widely believed that intelligent life existed on mars. the 19th-century discovery of whatappeared to begeometric designs cut across the surface was taken as evidence. the lines were thought to have been a system of canals that had been built to irrigate the surface. it is now clear that “canals”—perhaps the most spectacular geologic features of mars —are natural valleys ｗhere ancient rivers once flowed.another fragmented idea concerns the planet’s seasonal changes in color. once attributed to the rapid spread of somelife-form, these shifts are now known to develop ｆrom the movement of fine dust in the atmosphere. by the close of the 20th century none of the many experiments conducted by spacecraft had ever found persuasiveevidence of life. nevertheless, speculation continued over the existence of some form of life, in either the present ｏr the past. in 1996 scientists discovered ｏrganic compounds ａnd minerals in a meteorite（陨石）, consisting of martian rock, that collided with earth around 11,000 b.c. these compounds suggest that mars may have been inhabited by ｏrganisms mｏre than three billion years ago.本题15分1．Why did people in the 19th century believe the existence of intelligent life on Mars?2．The “canals”on Mars have proved to be ______ according to the passage.A、the minor geologic characteristic of MarsB、natural valleys on the surface of MarsC、rivers that have kept flowing since ancient timesD、a system that irrigates the whole surfaceA、Because the surface of Mars seemed to be geometric.B、Because the lines were drawn across the surface of the planet.C、Because a system of canals was thought to be there.D、Because it was the Martians that built the canals.3．What were the Mars’seasonal changes in color believed to be?4．How is the 1996 discovery related to the possible existence of organisms on Mars?5．How many arguments in this passage lead to the belief of the existence of life on Mars?A、Two.B、Three.C、Four.D、Five. A、The meteorite containing organic compounds is part of Mars.B、A Martian rock struck Earth about 11,000 years ago.C、The organisms came back to life after the collision with Earth.D、The inhabiting organisms appeared more than three billion years ago. A、The natural changes on the planet.B、The seasonal cycles.C、The movement of some life form.D、The storm of dust in its atmosphere.完成考试温馨提示：请一定要点击左边的“完成考试”按钮提交试卷，显示“答卷结果保存成功”表示提交成功，否则考试结果将无分值。

《大学英语4》2015年春学期在线作业(二)一、单选题：1.( )( )( )he is absent, what shall we do? (满分:4)A. Now thatB. Seeing thatC. WhetherWhetherD. Supposing that正确答案:A2.My father told me to behave ( ), when I got my first job as an accountant. (满分:4)A. rudelyB. carelesslyC. strictlystrictlyD. decently正确答案:D3.Most of his great novels and plays were not published or known to the public ( )( ) his tragic(悲剧) death in 1786. (满分:4)A. even beforeB. ever sinceC. until afteruntil afterD. until before正确答案:C4.He has no tickets ( )( ) for Friday’s performance. (满分:4)A. availableB. attainableC. applicable applicableD. appreciable正确答案:A5.Never lose heart ( )( ) difficulty you may meet with. (满分:4)A. whatB. whateverC. howhowD. however正确答案:B6.It’s not polite to ( ) a person while he is talking with others. (满分:4)A. involveB. interruptC. interviewinterviewD. interpret正确答案:B7.The mouse never ( ) too far from it hole. (满分:4)A. goesB. comesC. venturesventuresD. returns正确答案:C8.( )( )( )the 1500's( )( )( )the first Europeans explored the coast of California. (满分:4)A. It was not until ... whenB. It is until ... thatC. It is not until ... when It is not until ... whenD. It was not until ... that正确答案:D9.That tree looked as if it ( ) for a long time. (满分:4)A. hasn’t wateredB. hadn’t been wateredC. didn’t waterdidn’t waterD. wasn’t watered正确答案:B10.We want Taylor in jail where we can ( )( )( ) him. (满分:4)A. keep up withB. keep inC. keep an eye on keep an eye onD. keep on正确答案:C11.Fred turned his head, trying to ( )( ) breathing in the smoke. (满分:4)A. refuseB. avoidC. objectobjectD. expect正确答案:B12.If he had worked harder, he ( ) the exams. (满分:4)A. must have got throughB. would get throughC. would have got through would have got throughD. could get through正确答案:C13.I wish I ( ) longer this morning, but I had to get up and come to class. (满分:4)A. could have sleptB. sleptC. might have sleptmight have sleptD. have slept正确答案:A14.We have been studying German ( )( ) we entered this school. (满分:4)A. forB. sinceC. as asD. because正确答案:B15.He seemed to have been asleep, so I said nothing, but sat ( )( ) he would see me ( )( ) waking. (满分:4)A. whether; whenB. that；whenC. which；wherewhich；whereD. where；when正确答案:D16.It was an invention which laid the ( )( )( ) of modern radio technology. (满分:4)A. emphasisB. stressC. opportunityopportunityD. foundations正确答案:D17.Professor Edward was invited to join a three-year research ( ) in California. (满分:4)A. projectB. progressC. programprogramD. process正确答案:A18.( )( ) I strongly disagree with the court’s decision, I accept it. (满分:4)A. WhenB. WhileC. ThusThusD. Because正确答案:B19.( ) right now, she would get there on Sunday. (满分:4)A. Would she leaveB. If she leavesC. Were she to leaveWere she to leaveD. If she had left正确答案:C20.Their new house is said to be ( )( ) on this street, but we cannot find it. (满分:4)A. locatedB. seatC. lielieD. embed正确答案:A21.Young( )( )( )John was, he was able to swim across the channel within minutes. (满分:4)A. asB. soC. thoughthoughD. although正确答案:A22.It is vital that enough money ( ) to fund the subject. (满分:4)A. be collectedB. must be collectedC. is collectedis collectedD. can be collected正确答案:A23.( )( ) we are allowed ( )( ) , we can’t drink any beer. (满分:4)A. As long as; to doB. If; toC. Unless; toUnless; toD. On condition that; doing so正确答案:C24.Take an umbrella with you ( )( ) it might rain. (满分:4)A. even ifB. in caseC. althoughalthoughD. since正确答案:B25.Both candidates are ( ) millions ( ) television advertising. (满分:4)A. spending…in…B. taking…on…C. affording…on…affording…on…D. spending …on…正确答案:D。

1.题目和答案如下图所示：A.AB.BC.CD.D【参考答案】: A2.一维数组和线性表的区别为（）。

A.前者长度固定,后者长度可变B.两者长度均固定C.前者长度可变,后者长度固定D.两者长度均可变【参考答案】: A3.链表不具有的特点是（）。

A.插入、删除不需要移动元素B.可随机访问任一元素C.不必事先估计存储空间D.所需空间与线性长度成正比【参考答案】: B4.用堆栈求算术表达式a+b*(c-d)-e/f的后缀表达式为（）。

A.abcd-*ef/-B.ab*(c-d)-e/fC.abcdef-*/-D.abc-d*ef/-【参考答案】: B5.若串S=“software”,其子串数目是（）。

A.8B.37C.36D.9【参考答案】: C6.设有两个串T和P，求P在T中首次出现的位置的串运算称作（）。

A.联接B.求子串C.字符定位D.子串定位【参考答案】: D7.题目和答案如下图所示：A.AB.BC.CD.D【参考答案】: D8.关于完全二叉树，不正确的描述是（）。

A.每个结点必须首先有左儿子，然后才能有右儿子。

B.在具有相同结点的所有二叉树中，它的高度最小。

C.每个结点的左右子树的高度最多相差为1。

D.没有度为1的结点。

【参考答案】: D9.下面关于线性表的叙述中，错误的是哪一个？（）。

A.线性表采用顺序存储，必须占用一片连续的存储单元。

B.线性表采用顺序存储，便于进行插入和删除操作。

C.线性表采用链接存储，不必占用一片连续的存储单元。

D.线性表采用链接存储，便于插入和删除操作。

【参考答案】: B10.设深度为K的二叉树上只有度为0和度为2的结点，则这类二叉树上所含的结点总数为（）。

A.K1B.2KC.2K-1D.2K1【参考答案】: C11.若在线性表中采用折半查找法查找元素，该线性表应该（）。

A.元素按值有序B.采用顺序存储结构C.元素按值有序，且采用顺序存储结构D.元素按值有序，且采用链式存储结构【参考答案】: C12.图结构的广度优先搜索遍历算法中使用了（）。

华东中石油《流体力学与流体传动》2015年春学期在线作业（二）答案一、单选题（共10 道试题，共50 分。

）1. 有两个调整压力分别为5MPa和10MPa的溢流阀串联在液压泵的出口，泵的出口压力为（）。

A. 5MPaB. 10MPaC. 15MPaD. 20MPa正确答案：C2. 双伸出杠液压缸，采用活塞杠固定安装，工作台的移动范围为缸筒有效行程的（）。

A. 1倍B. 2倍C. 3倍D. 4倍正确答案：B3. 减压阀控制的是（）处的压力。

A. 进油口B. 出油口C. A 和B都不是正确答案：B4. 顺序阀在系统中作背压阀时，应选用（）型。

A. 内控内泄式B. 内控外泄式C. 外控内泄式D. 外控外泄式正确答案：A5. 在节流调速回路中，哪种调速回路的效率高？（）A. 进油节流调速回路B. 回油节流调速回路C. 旁路节流调速回路D. 进油—回油节流调速回路正确答案：C6. 能形成差动连接的液压缸是（）。

A. 单杆液压缸B. 双杆液压缸C. 柱塞式液压缸正确答案：A7. 双作用多级伸缩式液压缸，外伸时推力和速度的逐级变化，结果是：（）。

A. 推力和速度都增大B. 推力和速度都减小C. 推力增大，速度减小D. 推力减小，速度增大正确答案：D8. 液压缸差动连接工作时，缸的（）。

A. 运动速度增加了B. 压力增加了C. 运动速度减小了D. 压力减小了正确答案：A9. 调速阀是用（）而成的。

A. 节流阀和定差减压阀串联B. 节流阀和顺序阀串联C. 节流阀和定差减压阀并联D. 节流阀和顺序阀并联正确答案：A10. 在用节流阀的旁油路节流调速回路中，其液压缸速度（）。

A. 随负载增大而增加B. 随负载减少而增加C. 不受负载的影响正确答案：B二、判断题（共10 道试题，共50 分。

）1. 在节流调速回路中，大量油液由溢流阀溢流回油箱，是能量损失大、温升高、效率低的主要原因。

A. 错误B. 正确正确答案：B2. 定量泵与变量马达组成的容积调速回路中，其转矩恒定不变。

《房屋建筑学》2015年春学期在线作业(二)一、单选题：1.工业厂房的通风分( )通风和( )通风两种。

(满分:4)A. 热压；风压B. 空调；自然C. 机械；空调D. 机械；自然正确答案:A2.框架结构体系是骨架承重体系中最常用的一种。

其主要结构承重构件为( )、( )和( )。

(满分:4)A. 梁板柱B. 墙基础屋顶C. 板柱基础D. 屋顶墙基础正确答案:A3.一般情况下，一个梯段不应小于( )步，也不应大于( )步。

(满分:4)A. 2；18B. 3；18C. 3；20D. 2；20正确答案:B4.钢筋混凝土墙承重体系的承重墙按其施工工艺可以分为( )和( )两种主要形式。

(满分:4)A. 砌块；砖B. 横墙；纵墙C. 现浇；预制装配D. 内墙；外墙正确答案:C5.空间结构( )受力，可以较为充分地发挥材料的性能，因而结构自重小，是覆盖( )的理想结构形式。

(满分:4)A. 集中B. 各向C. 整体D. 全部正确答案:B6.按照结构层、防水层和保温层所处的地位不同，屋顶保温体系可分为( )三种。

(满分:4)A. 热屋顶保温体系、冷屋顶保温体系和倒铺保温屋面体系B. 实体材料隔热屋面、通风层降温屋顶和反射降温屋顶C. 檩式屋顶结构、椽式屋顶结构和板式屋顶结构D. 双坡顶、四坡顶和其它形式顶正确答案:A7.钢筋混凝土楼板依其受力特点和支撑情况，有( )之分。

(满分:4)A. 现浇整体式和预制装配式B. 板式楼板和梁板式楼板C. 实心平板、操形板和空心板D. 单向板和双向板正确答案:D8.楼梯由( )、( )和( )三部分组成。

(满分:4)A. 梯段、平台、栏杆扶手B. 梯段、栏杆、扶手C. 梯段、平台、缓冲部分D. 梯段、平台、缓冲部分正确答案:A9.根据工作班时间内的工作时间，桥式吊车的工作制分( )、( )和( )三种。

(满分:4)A. 单级、双级、多级B. 简单、中等、复杂C. 重级、中级、轻级D. 假日、平时、特殊正确答案:C10.建筑物中的变形缝有三种，分别是( )。