工程测试习题集

一、填空题（每题2分，共10分）1、 信号可以分为 静态 及动态两类。

2、 动态信号按变化规律可以分为确定性和随机性（不确定性） 信号两类。

3、 周期信号频谱的特点是离散频谱，非周期信号频谱的特点是 连 续 频 谱。

4、 信号一经截断则必然会产生 泄 露。

5、 直流电桥电路的平衡条件是 4231R R R R =。

二、判断正误题（每题1分，共10分）1、二阶系统主要特征参数是时间常数τ。

（×）2、用数学关系式来描述周期信号。

（√）3、任何测试装置的输出信号频率总等于输入信号频率。

（√）4、在常系数线性系统中，当初始条件为零时，系统的输出量的拉氏变换与输入量的拉氏变换之比称为传递函数。

（√）5、二阶系统固有频率 f n （ωn ）越大越好。

（√）6、灵敏度是输出量和输入量的比值，又称放大倍数。

（√）7、为了改善磁带记录仪重放磁头的电压输出信号，应后续微分放大电路。

（×）8、减小光线示波器的非线性误差的办法是增大初始夹角0θ和线圈偏转角θ。

（×）9、在平面状态下，当主应力大小和方向未知时，通常采用互相垂直的两个应变片进行测量。

（×）10、差动变压器式位移传感器，输出电压只代表位移的大小，而不代表位移的方向。

（×）三、选择题（各1分，共10分。

将答案的相应字母填在括号内）1、描述周期信号的数学工具是（ B ）A．相关函数 B.付氏级数 C.拉氏变换 D.付氏变换2、不能用确定的函数关系描述的信号是（C）A．复杂周期信号B．瞬态信号C．随机信号D．周期信号3、在进行振动加速度信号测量时，采用的传感器是（C）A．电涡流传感器B．磁电式传感器C．加速度计D．电感式传感器4、测试装置所能检测输入信号的最大变化能力称为（D）A．精度B．灵敏度C．精密度D．分辨力5、能完成接受和实现信号转换的装置称（A）A．传感器 B．记录仪 C．实验装置 D．数据处理装置6、直流电桥中，采用下述哪种接法的灵敏度最高（C）A．单臂工作 B．双臂工作 C．全桥工作7、为了保证获得最佳阻尼，对于固有频率大于400Hz的振子，应选用（D）A. 电磁阻尼 B．速度负反馈阻尼 C．过阻尼 D．油阻尼8、由电感L、电阻R、电容C组成的电路系统是（A）A. 二阶系统 B．零阶系统 C．一阶系统 D．三阶系统9、信号调制过程中，调制器相当于（C）器A．相加B．相除C．相乘D．积分10、自相关函数是一个（B）函数A．奇B．偶C．非奇非偶D．三角四、计算题（共70分）1、用一个一阶系统的放大器放大200Hz 正弦信号，若要求幅值误差小于5%，问放大器的时间常数最大值为多少？假若用这台放大器放大150Hz 正弦信号，求其幅值误差为多少？（01A =）（10分）解：（4分）由γ=0()15%A A ω-=-，0()A A ω=2)(11ωτ+=0.95 τ =1)95.01(2-•20021⨯π=0.000262 （6分）当 f =150Hz 时，0()A A ω =2)000262.01502(11⨯⨯+π=0.9708 γ =)(ωA -1=0.9708-1=2.92%2、如图所示，求半波整流周期波的幅频谱图和()x t 的展开式。

通信工程师习题集1、问答题某边际网搬迁工程，原基站配置为O2站，载频输出功率为40W，合路器损耗为1dB，馈线损耗为3dB，天线增益为11dBi。

此基站位于两省交界处一个小山上，天线挂高近百米，（江南博哥）山上树木较多，且覆盖区内有铁路直线穿过。

其中火车厢体损耗为15dB，覆盖区内铁路线最远处距基站的空间损耗为142dB。

手机最大发射功率2W，手机接收灵敏度为-102dBm。

请根据该站实际环境特点给出如何进行天线选型、工程设计和网规参数设置？正确答案：天线选型：A、由于该基站位于山顶，需要考虑山脚小镇的覆盖，并且山体较高，因此在天线选型时需要使用内置下倾角天线；B、选择高增益天线，增强小区覆盖。

工程设计：C、因为基站在山顶，工程设计时需要重点考虑防雷设计；D、在天线安装设计时发射天线和接收天线连线应垂直于铁路线；E、考虑到山上树木较多，在进行天线安装时必须高出树木，避免树木吸收遮挡信号，影响覆盖。

参数规划：F、由于铁路位于交界处，火车驶入本小区内，会产生较多的突发位置更新，需要打开SDCCH动态分配；G、避免同其他区域出现同频、同BSIC情况；H、协调另外一个地区进行邻区配置。

2、单选电缆孔洞和管井应采用（）封堵，通信电缆不应与动力馈电线缆敷设在同一走线孔洞（管井）内。

A、难燃性材料B、可燃性材料C、不燃性材料D、易燃性材料正确答案：C3、单选无线局域网的标准是（）A.802.2B.802.3C.802.3uD.802.11正确答案：D4、判断题在传统的网络模型中，传输层、链路层、网络层相互连接，用统一的语言在层内进行设备间沟通，形成统一的标准体系.正确答案：错5、单选蒸发传感器的测量范围为0-100mm，分辨率0.1mm，测量准确度为（）A、±0.5％B、±1.5％C、±15％D、±5％正确答案：B6、单选以下不属于线性调制的调制方式是（）。

A.AMB.DSBC.SSBD.FM正确答案：D7、单选按信号特征通信系统可分为模拟和数字通信系统，以下为数字通信系统的是（）。

化学反应工程测试习题集（精心整理）第一章绪论1.化学反应工程是一门研究______________的科学。

2.化学反应工程是一门研究化学反应的工程问题的科学，既以_______作为研究对象，又以_______为研究对象的学科体系。

3._______是化学反应工程的基础。

）4.化学反应过程按操作方法分为_______、_______、_______操作。

5.化学反应工程中的“三传一反”中的三传是指_______、_______、_______。

6.不论是设计、放大或控制，都需要对研究对象作出定量的描述，也就要用数学式来表达个参数间的关系，简称_______。

A．化学反应B.反应工程C.反应热力学D.反应动力学9.“三传一反”是化学反应工程的基础，下列不属于三传的是_______。

A.能量传递B.质量传递C.热量传递D.动量传递第二章均相反应动力学1.均相反应是指_。

pP+S对于反应，则rP_______(rA)。

2.aA+bB3.着眼反应组分K的转化率的定义式为_______。

4.当计量方程中计量系数的代数和等于零时，这种反应称为_______，否则称为_______。

5.化学反应速率式为rAKCCACB，用浓度表示的速率常数为KC，假定符合理想气体状态方程，如用压力表示的速率常数KP，则KC=_______KP。

6.化学反应的总级数为n，如用浓度表示的速率常数为KC，用逸度表示的速率常数，则KC=_______f。

K7.化学反应的总级数为n，如用浓度表示的速率常数为KC，用气体摩尔分率表示的速率常数y，则KC=_______Ky。

8.在构成反应机理的诸个基元反应中，如果有一个基元反应的速率较之其他基元反应慢得多，他的反应速率即代表整个反应的速率，其他基元反应可视为处于_______。

9.当构成反应机理的诸个基元反应的速率具有相同的数量级时，既不存在速率控制步骤时，可假定所有各步基元反应都处于_______。

建筑工程施工设计考试题库一、选择题1. 下列哪种工程材料是建筑施工中必不可少的？A. 金属材料B. 木材C. 玻璃D. 土壤2. 土方工程是指？A. 处理土石方的工程B. 处理土壤固化的工程C. 处理土壤污染的工程D. 处理土壤排水的工程3. 在建筑工程中，施工单位的主要职责是？A. 策划和设计工程方案B. 安装建筑材料C. 组织施工作业D. 进行工程测量4. 建筑工程施工中，哪一个不是施工现场必备的设施？A. 施工机械B. 电力设备C. 维修工具D. 劳动保护用品5. 施工合同中的“开工日期”是指？A. 施工单位开始施工的日期B. 设计单位开始设计的日期C. 竣工验收的日期D. 合同签订的日期6. 建筑工程中的“静载”是指？A. 不同于地面移动载荷的载荷B. 长期施加在构件上的载荷C. 施加在构件上的动态载荷D. 同一个位置上的单一载荷7. 建筑工程中使用的“混凝土”是？A. 融化石灰石、黏土和砂的矿物B. 水泥、砂、石子和水的混合物C. 铁、碳和其他金属的混合物D. 石膏和水的混合物8. 建筑工程中的“钢筋”是？A. 碳素合金制成的钢材B. 硅的合金制成的钢材C. 钨钢和硬质合金制成的钢材D. 铁和碳的合金9. 在建筑施工中，“楼板”是指？A. 用于支撑上部结构的平面部分B. 用于固定楼梯的部分C. 用于加固地基的部分D. 用于固定门窗的部分10. 下列哪种工程是建筑施工中常见的专业工程？A. 环境工程B. 电气工程C. 农业工程D. 水利工程二、填空题11. 建筑工程施工常见的三大单位是设计单位、施工单位和_________单位。

12. 施工图纸中的“结构图”主要是针对建筑的________结构展开设计。

13. 建筑材料中常见的玻璃种类有普通玻璃、_________玻璃和夹层玻璃。

14. 土方工程中是以_________为单位进行工程量计算。

15. 施工单位在工程上必须遵守的相关法规是《建筑法》和《建设工程质量安全监督条例》以及各级国家强制性的建设工程____________。

第 1 章材料的性能 、选择题1. 表示金属材料屈服强度的符号是（ B ） A.σ B.σs C.σb D.σ-12. 表示金属材料弹性极限的符号是（A ） A.σeB.σsC.σbD.σ-13. 在测量薄片工件的硬度时，常用的硬度测试方法的表示符号是（B ） A.HB B.HRC C.HV D.HS4. 金属材料在载荷作用下抵抗变形和破坏的能力叫（ A ） A. 强度 B. 硬度 C. 塑性 D. 弹性二、填空1. 金属材料的机械性能是指在载荷作用下其抵抗（变形 ）或（破坏 ）的能力。

2. 金属塑性的指标主要有（伸长率）和（断面收缩率）两种。

3. 低碳钢拉伸试验的过程可以分为弹性变形、 （塑性变形）和（断裂）三个阶段。

4. 常用测定硬度的方法有（布氏硬度测试法） 、（洛氏硬度测试法）和维氏硬度测试法。

5. 疲劳强度是表示材料经（无数次应力循环）作用而（不发生断裂时）的最大应力值。

三、是非题1. 用布氏硬度测量硬度时，压头为钢球，用符号 HBS 表示。

2. 用布氏硬度测量硬度时，压头为硬质合金球，用符号HBW 表示。

3. 金属材料的机械性能可以理解为金属材料的失效抗力。

四、改正题1. 疲劳强度是表示在冲击载荷作用下而不致引起断裂的最大应力。

2. 渗碳件经淬火处理后用 HB 硬度计测量表层硬度 。

3. 受冲击载荷作用的工件，考虑机械性能的指标主要是疲劳强度。

4. 衡量材料的塑性的指标主要有伸长率和冲击韧性。

5. 冲击韧性是指金属材料在载荷作用下抵抗破坏的能力。

五、简答题6. 在立方晶系中 , 指数相同的晶面和晶向 （B ） A.相互平行 B. 相互垂直 C. 相互重叠 D. 毫无关联7. 在面心立方晶格中 , 原子密度最大的晶面是 （C ） A.（100） B.（110） C.（111） D.（122）将冲击载荷改成交变载荷 将 HB 改成 HR 将疲劳强度改成冲击韧性 将冲击韧性改成断面收缩率 将载荷改成冲击载荷1. 说明下列机械性能指标符合所表示的意思：σ σs:屈服强度 HRC ：洛氏硬度（压头为金刚石圆锥）σb : 抗拉强度HBS:布氏硬度（压头为钢球） 第 2 章材料的结构一、选择题1. 每个体心立方晶胞中包含有（ B ）个原子2. 每个面心立方晶胞中包含有（ C ）个原子3. 属于面心立方晶格的金属有（ C ）4. 属于体心立方晶格的金属有（ B ）5. 在晶体缺陷中，属于点缺陷的有（ A ）s 、σ 0.2 、 HRC 、σ -1 、σ b 、δ 5、 HBS 。

TEST121.He refused to acknowledge that he was defeated. (C. Admit)22.That book is the authentic story of a doctor's life.(B. genuine)23. The pilot really knows how to handle an airplane. (A. steer)24. He was in town to promote his new book. (D. publicize)25. The police pursued the bank robber. (D. Chased)26. Bridges over railroad tracks eliminate danger in crossing.( A.get rid of )27. The hospital is supported by voluntary contributors. (B. Volunteered)28. You are wasting your potential on this job. (C. Capability)29. He has a substantial understanding of economics. (B. a solid）30. The Chamber of Commerce boosts local business.（C. advances )31. He is so clever ,and he makes me feel ______.(B.inferior)32. The king was so much under the influence of his wife that he was the____ruler of the country.(A.virtual)33. The decision was made in ___ with local police.(A. Consultation）34. the__owner of the house was the duke of wellington.（D. original）35. He views everything from a political______（B.perspective）36. Your work is________all praise.（C. Beyond）37. After being defeated they ____to the enemy.（ B. Submitted）38. They traveled from London to Paris___Dover. （ A. Via）39. They have ________ to the files. （B.means）40. Don't waste energe ______over such a minor matter.（D. Handing）TEST221. They went away for a fortnight on holiday. (B. two weeks )22. The play was too sophisticated for them. （D. complicated )23. They purchased a car last week.（ A. bought ）24. Will you help me to shift the furniture round, please? （C. move )25. He erased all the pencil marks on the book. (D. rubbed out )26. It was sensible of him to do that. (C. wise )27. The affair looks suspicious to me. (B. doubtful )28. That was an awful crime. (A. a terrible )29. To save more money you'll need to be more frugal.( D. economical )30. How to talk to a Martian is an academic question. (A. a theoretical )31. My property was ________ of in a sale.( C. Disposed)32. When Mr. Green retired his son ____ the business from him. (B. took over )33. We'd be ________ off without all that noise from the children's room.(C. better )34. If the land belongs to you, why don't you lay ________ to it? (D. claim )35. The repairs to your car will cost you ________ $35. (D. at most )36. The crowd____when it began to rain . ( B. Scattered)37. We hope that these meetings will __friendly relations between our two countries. (A.foster )38. This company is one of the largest________of its kind. ( C. Enterprises)39. The old universities of Oxford and Cambridge still have a lot of _____. (A. Prestige)40. He does the _____amount of work but expects promtion.( B. Minimum)Test321.A child hears his mother tongue spoken rom morning till night in its genuine form.( C. Real)22.Only a decade ago it had no modern industry worth speaking of. ( C. 10 years )23.The first few months of the year I had dreaded the ringing of the telephone, because Iknew it meant another critical decision to be made.(D. Crucial)24. Women are assumed to be weaker, slower and less skilled than men. (A. Supposed）25. In protest, blacks and sympathetic whites sat at the counters of these restaurants and refused to move until they were served. （A. considerate ）26. The brain drain of experts away from developing countries will greatly influencethese countries' development of sophisticated industry.（B. Advanced）27.It's no use just telling me to do it; give me positiveadvice as to how to do it.B. helpful28. They are confronting tremendous and more complicated problems.（D. Facing）29. Do you have any concept of what the room will look like with those colors?（D. idea）30. The professor may give extra attention outside of class to a student in need of help but probably will not treat him or her differently when it comes to evaluating school work. （A. commenting ）31.the structure of this animal's brain gives no __ that it is any more intelligent thanothers.（B.indication）32.Cater agreed to try to reduce American oil imports and control ___in the united states.（B.inflation）33. To ________ someone is to hurt him so that he suffers great pain.（ D. Torture）34. I learn that Mr. Rolleston has opened ________ with you for the publication of aseries of Irish books. （ C. Negotiations）35. While others sat at home studying papers on the subject, Jefferson got into a boat and made __ observations. （ D. on-the-spot）36. John was not listening and made a __ answer when called upon to recite.（C. random）37. A ___ person is one who does things without thinking about what the results might be.（D. reckless ）38. In that company, there appears ________ among clerks caused by the increasing use of computers. （D. redundancy ）39. John was a knowing man and very ________. （ A. Resourceful）40. It is a _for a city official to take tax money for his own use. （C. scandal ）Test421. To his surprise, he experienced an unexpected change for the better in his emotional outlook. （C. prospect ）22. The international conference on college English teaching last year was hosted by our department. （B. sponsored ）23. We agreed to ship our products to their country. （ B. transport ）24. Steel production in that factory is targeted for 50,000 tons this month.（B. Aimed）25. The prisoners became desperate in their attempts to escape.（D. wild ）26. My calculation was wrong because I overlooked one tiny point. （A.neglected ）27. Corruption in government was exposed through the agency of the press.（A. Dishonesty ）28. If you stand there you obscure our view of the race. （C. Shade）29. It is important that the selections be chosen from contemporary writings.（B. Modern）30. Anyone who doubts that global financial markets control national economies need only lookat the crisis facing the "tigers" of the Far East (B. universal )31. Whether he can pass the examination is thought to be _____ for his going abroad.（ D. crucial ）32. Every time he thought of the innocent people he killed in China, his __ was troubled.（C.conscience ）33. The FBI arrived in time to prevent the _ of the secret documents. （A. transmission ）34. One of the attractive features of the course was the way the practical work had been ___ with the theoretical aspects of the subject. （D. integrated ）35. I do wish you could ________ these sheets of paper together.（ C. paste ）36.Cleaning out the basement was a ________ job. ( A. Tedious)37. The code was ________ to anyone who didn't have the key. ( D. Unintelligible)38. It is easier to aim at a ________ than at a moving target.（A. Stationary）39. The __ for the new classroom to be built next year are now ready.（C. specifications ）40.Mr. Smith attends to the ____ of important matters himself.（D. transaction ）Test 521.the market management in this city needs to be reinforced by an effective law.(C.strengthened)22.This airport is notorious for its bad security.(D.infamous)23.Further investigation conducted by a group of experts revealed previously hiddenfacts.(A.uncovered)24.Real-life impressions of nature are far more memorable than any lesson children can extract from a book.(B.derive)25.Students will find how wind direction and intensity shift at different attitudes.(D.change)26.She suddenly recalled that her blanket had been taken away.(B.remembered)27.When he checked in a hotel, it was already nine o'clock in the evening. (B.registered)28.He expressed his gratitude to her for her favorable help with the experiment.(C.thanks)29.They spent 3days in the desert without water,and they could not endure much st30.His concern forbids him to leave the house at such a time.(D.prohibits)31. First,let him look at their fingertips through a____glass.(B.magnifying)32.the students will get a basic lesson in scientific cause and ___(C.effect)33.by sharing your students' curiosity,you can give them a valuable lesson that___(A.extends)34.with a careful thought, she responded with more logical, complete and___answer.B.creative35. The newly-discovered medicine had its ___only on ordinary colds.(D.effect)36. She wanted to go to New York by herself, but her parents would not give their__(B.consent)37.The government has decided to reduce a (n)________ on all imports. ( B. tariff )38.As the situation was getting out of control, more policemen __ the streets in the city.(D. patrolled )39.We ________ that it would take four hours to weed the garden. (A. Estimated)40.The local government has ________ the landowners to fish these waters. (C. licensed ) Test 621. If these bad weather conditions persist the game will be cancelled. (B. continue )22. Steps must be taken to reduce administration costs. (B. Management)23. The economy grew at its fastest rate since 1980 owing to a boom in world trade.(D. an increase )24. The play was a great success, and it was all thanks to the effort and commitment of everyone involved. (A.because of )25. Approximately 113,000 bicycles were reported stolen last year.( C. Roughly )26. In many Russian cities basic foodstuffs are unavailable. (A. not obtainable )27. You are legally entitled to take faulty goods back to the store where you bought them.(A. have the right to)28. He came out with such a(n) elaborate excuse that I didn't quite believe him.(C. Detailed)29. Everything will ultimately depend on what is said at the meeting with the directors next week. (D. finally )30. In theory, the journey ought to take three hours, but in practice it usually takes four because of roadwork. ( C. Theoretically )31. It's difficult to believe that this little brown thing will eventually turn ________ a beautiful butterfly. (D. into )32. The UN is sending 800 troops to ____ the army patrolling the border area. (D. Reinforce)33. I keep my insurance policy in the top drawer, __ my other important documents. (A.alongwith )34. The new director of the television station wants to ________ its programs.( C. diversify )35. She can't walk without holding ______ someone's arm (C. on to )36. The French Revolution was a period of ____ but produced some great literature. (B. chaos )37. He is ___ fatter than he was when I used to know him.( C. considerably )38. The whole place was ________ with tourists.( B. crawling)39.Should the opportunity ________ I'd love to go to China. (A. arise )40.The government intends to ________ an end to inflation once and for all.( C. put)Test 721.As more nations acquire nuclear weapons, the necessity for preventing war becomes imperative.(A.exigent)22. Some stores make a survey of all foods and materials in their stock once a month so as to speed up their inventory liquidating.(B.stock)23.It is useful occasionally to look at the past to gain a perspective on thefuture.(D.outlook)24. Because of his mischievous deeds towards his classmate,the child was hauled up before the principal.(A.called)25.He lived in the most penurious manner, and denied himself every indulgence.(D.frugal)26. He has committed such a blunder, no one can save him this time. ( A. made)27. Sophisticated edit facilities allow complicated musical forms to be created. (D. Complicate)28. He was escorted by a group of soldiers under the command of Sarsfield.( A. safe-guarded )29. The young man dreamed that a rich relative would die and leave him a legacy.(A. Heritage)30. Joy was now having her hair done, seated on a mat on the floor.( C. small carpet )31. Mary phoned you from a telephone _________ this morning. (B. Booth)32. A promising executive should be ready to welcome tight ______ and hard work. (D. budget )33. No one knows the zip _________ of this strict, so I have to consult the postman in orderto mail this letter. (C. code )34.Guess, whom I ________ into this morning. (C. bumped )35. The lecturer continued that _________ law was different to criminal law. (D. civil )36.She helped him out of _________, but he misunderstood her. (A. Charity)37. There are different _________ of books in a library. ( C. categories)38. The schoolboys are more ____ not to make any mistakes in spelling than ever before.( B. cautious )39. The talented artist ___ an interesting decoration with this piece of tree root.( D.carved )40. The judicial minister ________ the latest crime figures as proof of the need for strengthening of the comprehensive administration of social public order. (B. Cited)Test 821.We want to preserve the character of the town while improving the facilities. (B. conserve )22. Tourism has replaced agriculture as the nation's main industry. (C. taken the place of )23. A statement issued by the two companies uses the phrase "increased co-operation"thereby inferring quite accurately that the two firms already work together.( B. produced )24. There is abundant evidence that cars have a harmful effect on the environment.( B.sufficient )25. The latest missiles can be fired with incredible accuracy. (D. unbelievable )26. Some drugs taken in large quantities can cause permanent brain damage. ( B. lasting )27. A judgement may be revised or reversed in the light of some particular action. (A. Changed)28. There is widespread speculation that he is going to resign. (A. general)29. At the end of the discussion, he summed up and added a few points.( C. summarized )30. Nigel is carrying out research on early Christian art. (C. conducting)31.Then system has been designed to give the user quick and easy ___to the required information.(A.access)32. Unhappy people often ___ to violence as a means of expressing their suffering.( C. Resort)33.She used to be terribly shy, but a year abroad has completely__her.(B.transformed)34. The unions __the new owners of the workers' loyalty to the company.(C.assured)35.There's a very informative__on aids in today's paper.(C.feature)36.Following his nervous breakdown, he __from public life and refused to give anyinterviews.(D.withdrew)37.The new president said she would __protecting the rights of the old, the sick and the homeless.(D.dedicate herself to)38.I think what__to me about his paintings is colors he uses.(B.appeals)39.Tourists are more__to attack, because they do not know which areas of the city to avoid.(C.vulnerable)40.What he said,__,was that he can't support our actions and will resign.(D.in essence)Test 921. Significant changes have taken place in the international situation. (A. Important)22. The election results do not always reflect back the views of the voters. (A. Express )23. As the service charge is included in the bill, any further tipping is unnecessary.(D. additional money )24. I, on behalf of my family, am obliged to you and your wife for your great help. (A.grateful )25. The trade-mark is registered on the book of the Patent office. (A. recorded )26. The driver's report o the accident was verified by eye-witnesses.(C. Confirmed)27. The local people like to use more durable material to build their houses. (A.long-lasting )28. They don't attach any importance to his statement.(C. connect)29. The function of ears in hearing is to convert the sound waves to nerve impulse. (B. Change)30. The soldiers cut trees down to make a block across the road. ( C. obstacle )31.The door's ___;we'll have to get through the window.(D.stuck)32.You shouldn't wash that sweater in the washing machine-it will ___.(A.shrink)33.Our government encourages technological ___in industry.(C.innovations)34.He is a famous writer who shows great ___into human nature.(D.insight)35.The island is __only boat.(A.accessible)36. There is a close_____ between climate and crops. ( D. correlation )37. To repair or improve the appearance of something is to fix it ________. ( A. out )38. These desks and seats can be ________ to the height of any child.( B. adjusted )39. Women are considered to be ________ to the suffering of animals. (B. sensitive )40. We couldn't ________ the old lady to travel by air.(C. induce )Test 1021. We must arouse them to fight for their own security. (A. stimulate )22. The driver tried to prevent the accident by bringing the car to a sudden stop.(B. holdback )23. He said he had arrived on the preceding night. (C. previous )24. All the members of the committee are opposed to our views about the matter. (B. opinions )25. At first the disease affected only his foot but now it has spread to his leg.( D. extended)26. He was urgent in his demands. (D. pressing )27. Professor Lee is well-known for his research in the behaviors of the cats. ( C. study )28. The simple plan evolved into a complicated scheme. (A. Developed)29. It was difficult to guess what her reaction to the decision would be. (C. response)30. He is full of admiration for her bravery. (B. respect )31. Their greatest weakness ________ itself during the discussion.( B. revealed )32.After the revolution, the ________ of the country remained tense. (A. climate )33.I'll always stand ________ you whatever happens.(B. by )34.34. It was a difficult time for her, but she __through beautifully. (B. weathered )35. The teacher_____ him for his neglect of duty. ( A. Recognized)36.There is an ___lack of food in that area.(C.acute)37.Take your ___to the hospital pharmacist's and they'll make up for you.(C.prescription)38.He ___to me that he had once been in prison.(A.confined)39.His hands were covering his face, but i could see him ___through his fingers.(D.peeping)40.To be quiet ___, I think you've made an awful mess of things.(D.blunt)。

目录0 绪论…………………………………………………………………………1土木工程材料的基本性质…………………………………………………2气硬性胶凝材料……………………………………………………………3水泥…………………………………………………………………………4混凝土………………………………………………………………………5建筑砂浆……………………………………………………………………6墙体材料……………………………………………………………………7天然石材……………………………………………………………………8金属材料……………………………………………………………………9合成高分子材料……………………………………………………………10木材…………………………………………………………………………11沥青与防水材料……………………………………………………………12绝热材料、吸声与隔声材料………………………………………………13建筑装饰材料………………………………………………………………习题解答0 绪论习题解答………………………………………………………………1土木工程材料的基本性质习题解答………………………………………2气硬性胶凝材料习题解答…………………………………………………3水泥习题解答………………………………………………………………4混凝土习题解答……………………………………………………………5建筑砂浆习题解答…………………………………………………………6墙体材料习题解答…………………………………………………………7天然石材习题解答…………………………………………………………8金属材料习题解答…………………………………………………………9合成高分子材料习题解答…………………………………………………10木材习题解答………………………………………………………………11沥青与防水材料习题解答…………………………………………………12绝热材料、吸声与隔声材料习题解答……………………………………13建筑装饰材料习题解答……………………………………………………0 绪论0.1学习指导一、内容提要本章主要介绍土木工程材料的定义、分类、作用、发展趋势与技术标准以及本课程的学习目的与任务。

绪论0-1．什么是测试？0-2．叙述工程测试技术在信息技术中的地位和作用。

0-3．工程测试技术的发展可以分为哪几个阶段？0-4．工程测试技术的任务是什么？0-5．测试系统有那些环节，各个环节的功能是什么？0-6．学习工程测试技术的目的是什么？第一章测试系统的基本特性1-1．什么是线性系统？线性系统的基本特性有哪些？1-2．什么是静态特性？叙述评价测量装置静态特性的指标及其含义。

1-3．什么是动态特性？如何描述测量装置的动态特性？1-4．名次解释：传递函数、频率响应函数和脉冲响应函数。

1-5．如何计算串联和并联环节的传递函数？1-6．一阶和二阶系统有哪些基本特性？1-7．如何计算测试装置对输入信号的响应？1-8．测试失真的原因是什么？如何设计不失真测试系统？1-9．怎样测试测量装置的动态特性？1-10．名次解释：真值、误差、绝对误差、相对误差、引用误差、精度。

1-11．根据误差的特点和性质，叙述误差的种类、特点、产生原因和消除方法。

1-12．处理测量结果的步骤有哪些？1-13．将一台灵敏度为40pC/kPa的压电式力传感器与一台灵敏度调整到0.226mV/pC的电荷放大器相联，其总灵敏度是多少？1-14．试判断下列结论的正误：1）在线性不变系统中，当初始条件为0时，系统输出量与输入量之比的拉普拉斯变换称为系统的传递函数。

2）当输入信号x(t)一定时，系统的输出y(t)将完全取决于传递函数H（S），而与系统的模型无关。

3）传递函数相同的各种装置，其动态特性均相同。

4）测试装置的灵敏度愈高，其测量范围就愈大。

5）一线性系统不满足“不失真测试”条件，若用它传输一个1000Hz的单一频率的正弦信号，则必然导致输出波形失真。

1-15．有两个温度计，一个响应快，能在6s内达到稳定，一个响应慢，需要15s内才能达到稳定，请问两个温度传感器谁的时间常数小？1-16．用一个时间常数为0.35s的一阶装置去测量周期分别为1s，2s，5s的正弦信号，问幅值误差是多少？1-17．求周期信号x(t)=0.5cos10t+0.2cos(100t-45o)通过传递函数H(s)=1/(0.005s+1)的装置后所得到的稳态响应。