2022年国开04008-理工英语4-任务3-辅导资料以及最新国家开放大学电大传感器与测试技术期末题库及答案.docx

《2022年国开04008-理工英语4-任务3-辅导资料以及最新国家开放大学电大传感器与测试技术期末题库及答案.docx》由会员分享，可在线阅读，更多相关《2022年国开04008-理工英语4-任务3-辅导资料以及最新国家开放大学电大传感器与测试技术期末题库及答案.docx（29页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、2022年国开04008-理工英语4-任务3-辅导资料以及最新国家开放大学电大传感器与测试技术期末题库及答案国开04008-理工英语4-任务3参考答案说明：假如课程题目是随机的，请按CTRL+F在题库中逐一搜寻每一道题的答案特别说明请细致：课程的题目每学期都可能更换，所以请细致核对是不是您须要的题目再下载！题目1：What advice would you give to a friend who wants cosmetic surgery?.: I would advise themnot to have that surgery, becausethey are very well.;

2、Iwould tell them that there are many risks and much cost of thatsurgery.; Ihave nothing to give to my friends.参考答案：Iwould tell them that there are many risks and much cost of thatsurgery.题目2：It is hard for any woman to resist _ herself more beauty.: make; made; making参考答案：making题目3：You will get your

3、 cosmeticsurgery on your nose.Please tell me if you like this medical plan _.: or not; do you; OK参考答案：or not题目4：Is it better to be physically attractive or intelligent?.: Yes, it is very attractive.; No, it is not attractive.; For me, be intelligent is better, but that depends on.参考答案：For me, be int

4、elligent is better, but that depends on.题目5： I have a scar on my face, so Ivemake up my mind to have a plastic surgery.: Good idea.; Ive no idea.; Amazing.参考答案：Good idea.题目6：二、阅读理解：阅读下面的短文，依据文章内容进行推断，正确写T错误写F。PASSAGE 1With a teeny waist, exaggerated breasts, icy-blue eyes, 21-year-old Valeria says s

5、he is the realnatural deal. A real-life Barbie, that is.Thats what she claims anyway, but many people doubt to her claims. Whether she underwentplastic surgery or uses Photoshop remains unclear. On her blog, the model notes that she is themost famous woman on the Russian Internet because of her doll

6、-like appeal. Hundreds of photoson her Facebook page show a wide-eyed, nearly fake-looking Valeria posing in a variety ofoutfits.The model did not return requests for comment. If Photoshop is not a factor in getting Valerias look, she likely underwent a barrage of plastic surgery. The president of A

7、merican Society of Plastic Surgeons （ASPS）said, plastic surgery should never be usedto transform oneself intoa favorite celebrity or, in this case, a play toy. He also warns patients to keep in mindthatplastic surgery is real surgery with real risks, just as with any operation, so the decision shoul

8、dnot be taken lightly.1. Valeria thinks thatshe is areal-life Barbie.T; F2. Valeriaused to accept plastic surgery.T; F3. Valeria writes that she is the most famous woman on the Russian Internet becauseshe postsa lot of pictures on her blog.T; F4. The author thinksValeria neitherPhotoshops her, nor a

9、ccepts a seriesof plastic surgery.T; F5. The president of ASPS thinks that plastic surgery is of risks.T; F参考答案：子问题1：T; 子问题 2：F; 子问题 3：F; 子问题 4：F; 子问题 5：T题目7： Would you have cosmetic surgery if it was free?.: No. Good diet and exercisearegreat alternatives.; Yes, Iwould not have it.; No,I wouldhave

10、it.参考答案：No. Good diet and exercisearegreat alternatives.题目8：Whats _issue here is the difference between cosmetic and plastic surgery.: at; on; in参考答案：at题目9：Cosmetic surgeryinvolves _ reshaping the body features.: in; at; on参考答案：in题目10：Do you think cosmetic surgery is more popular with women?.: Yes,

11、women are more popular than men.; No, men are popular than women.; Yes，absolutely. Becausewomen pay more attention to beauty.参考答案：Yes，absolutely. Becausewomen pay more attention to beauty.题目11：二、阅读理解：阅读下面的对话，选择合适的内容将对话补充完整。HENRY:Good afternoon!Lucy, I am telling yousomething urgent.We have foundseve

12、ral cases of golden staph infectedin our patients. They werecaused byyour products.LUCY: Are you sure? Our bandages are very safe.A; B; C; D; E.HENRY: I knowthat. Butonly patients who have used yourbandages are infected.LUCY: All of our products weremade with theutmostcare.A; B; C; D; E. And why did

13、nt you put the bandages into the sterilizer before you usedthem?HENRY: Lucy,A; B; C; D; E. Ive already askedthe hospitalto doa re-examination of your supplies rightnow.LUCY: Henry, youremaking things difficult.HENRY: The safety of our patientsismost important,A; B; C; D; E.LUCY: But I have already p

14、ostedyour recent order. They are nowon the way.HENRY: Sorry, Lucy.As soon as theyarrive,A; B; C; D; E.A. May be they were polluted in your hospital.B. so I will stop all orders with your company.C. This is the first time weve received a complaint of this nature.D. they will be returned to your facto

15、ry immediately.E. its your job to do that, not ours.参考答案：子问题1：C; 子问题 2：A; 子问题 3：E; 子问题 4：B; 子问题 5：E题目12：The plastic surgeonmay provide several plansfor your facial _: reconstructed; reconstruction; reconstruct参考答案：reconstruction题目13：Doctor，please let meknow _ youcan reconstruct my face.: what; wheth

16、er; which参考答案：whether题目14：It is known to all that a lot of South Korean _ accepted plastic surgery.: celebrations; celebrates; celebrities参考答案：celebrities题目15：Although plastic surgeryis created to improve the looks of aperson, there are a certain percentage of_.: effect; results; consequences参考答案：co

17、nsequences题目16：二、阅读理解：阅读下面的短文，依据文章内容从A、B、C三个选项中选出一个最佳选项。（课外资料）I am very happy to sharemy story about breastenlargement in Thailand. Anyone who is not sure about breast enlargementshould read this story first.Firstly, I was amazed at the level of care I received at the Thailand private hospital. It w

18、as like being in a luxury hotel. The nursing staffs were also better than those whoI have ever metin all my yearsin America. Not only were they professional, but kinder and more patientthan Western nurses.The hospital food was excellent, so I was able to choose from a large and varied Menu. In my pr

19、ivate room, there was cable T. V., a fridge, aphone, and impressiveviews of Bangkok. My Translator was able to communicate with me, and the plastic surgeons arrangedthe whole operation without me lifting a finger.The operation cost me a third of the price ofthe U. K. With thelow cost of the air tick

20、etsand a holiday, it worked out at about half UKs price, because the cost in Thailand is so cheap.Combining a plastic surgerywith a holiday in an amazing placeis anunforgettable experience. From the moment Iarrived in Bangkok airport,Ifelt relaxed and welcomed by the Plastic Surgery Holiday team, it

21、 made me feel thatI had friends here already.1. Where did the author have her breast-enlargementoperation?A; B; CA. In Thailand.B. In America.C. In U. K.2. Was the authorsatisfied with the nursing staffs for her?A; B; CA. No, because they were no better than Americanurses.B. Yes, because they were m

22、ore patient than Western nurses.C. No, becausethe care was very poor.3. Which of the following statement is TRUE?A; B; CA. The author was content with the food in the hospital.B. When the author was in the hospital, she lived in a public room.C. There was cable T. V., a bridgeand a phonein the autho

23、rs room.4. What does the underlined phraselifting a fingermean in paragraph three?A; B; CA. Doing something with only one finger.B. Helping with something.C. Carrying something.5. Why did the author think her experienceunforgettable?A; B; CA. Because she had an operation there.B. Because she was sat

24、isfiedwith everything there.C. Because she was satisfied withthe service and price there.参考答案：子问题1：A; 子问题 2：B; 子问题 3：A; 子问题 4：B; 子问题 5：C题目17：I was a little scared that it was my first time that I_ had my cosmetic surgery.: /; had; was参考答案：had题目18：Do you think cosmetic surgery is more popular with wo

25、men?.: Yes，absolutely. Becausewomen pay more attention to beauty.; No, men are popular than women.; Yes, women are more popular than men.参考答案：Yes，absolutely. Becausewomen pay more attention to beauty.题目19：Do you think cosmetic surgery is more popular with women?.: Yes，absolutely. Becausewomen pay mo

26、re attention to beauty.; Yes, women are more popular than men.; No, men are popular than women.参考答案：Yes，absolutely. Becausewomen pay more attention to beauty.题目20：It is known to all that a lot of South Korean _ accepted plastic surgery.: celebrates; celebrations; celebrities参考答案：celebrities题目21：Do y

27、ou think cosmetic surgery is more popular with women?.: No, men are popular than women.; Yes, women are more popular than men.; Yes，absolutely. Becausewomen pay more attention to beauty.参考答案：Yes，absolutely. Becausewomen pay more attention to beauty.题目22：It is known to all that a lot of South Korean

28、_ accepted plastic surgery.: celebrities; celebrations; celebrates参考答案：celebrities题目23：二、阅读理解：阅读下面的短文，选择合适的内容将短文补充完整。A. In case of any clarificationsB. During the three months probation period with our companyC. which indicates the cost to companyand other benefitsD. Congratulations on your continuo

29、us success.E. We are happy to inform you that you have been confirmed to the position of sales manager at our company1th, May2022Room 3544London StreetVancouver,424495Dear Mrs. Sue Read,A; B; C; D; E.Your salary has been revised to $1, 000 per month with effect from the confirmation dateA; B; C; D;

30、E.A; B; C; D; E, we have reviewed your performance and are pleased with your performance. You have achieved all your targets and finished all your work in time.A; B; C; D; E, please reach the generalmanager. His telephone number is+86-10-42823957. E-mail: billsales.A; B; C; D; E.Regards,BillSmith参考答

31、案：子问题1：E; 子问题 2：C; 子问题 3：B; 子问题 4：A; 子问题 5：D题目24：Do you think cosmetic surgery is more popular with women?.: No, men are popular than women.; Yes，absolutely. Becausewomen pay more attention to beauty.; Yes, women are more popular than men.参考答案：Yes，absolutely. Becausewomen pay more attention to beaut

32、y.题目25：Iaccepted my nose surgery, the _ and patientdoctor was really helpful during my recovery period.: graceful; greedy; gracious参考答案：gracious题目26：Do you think cosmetic surgery is more popular with women?.: Yes, women are more popular than men.; Yes，absolutely. Becausewomen pay more attention to b

33、eauty.; No, men are popular than women.参考答案：Yes，absolutely. Becausewomen pay more attention to beauty.最新国家开放高校电大传感器与测试技术期末题库及答案考试说明：本人针对该科细心汇总了历年题库及答案，形成一个完整的题库，并且每年都在更新。该题库对考生的复习、作业和考试起着特别重要的作用，会给您节约大量的时间。做考题时，利用本文档中的查找工具，把考题中的关键字输到查找工具的查找内容框内，就可快速查找到该题答案。本文库还有其他网核及教学考一体化答案，敬请查看。传感器与测试技术题库及答案一一、简答题

34、1静特性：2线性度：3涡流效应：4磁电式传感器有何优点?二、选择题1将电容量转换成电量的电路称作电容式传感器的转换电路，它们的种类许多，目前较常采纳的有、调频电路、脉冲调宽电路和运算放大器式电路等。A滤波电路 B差动电路C屏蔽电路 D电桥电路2传感器的动态特性是指传感器对随时间改变的输入量的响应特性。动态特性好的传感器，。A其测量的肯定误差与仪表的满量程之比小B其输出量随时间改变的曲线与被测量随时间改变的曲线一样或者相近C其输出量中与被测输入量无关的不须要的改变小D其动态数学模型可以用线性常系数微分方程来表示3当声波传播至两介质的分界面，一部分能重返回原介质，称为反射波；另一部分能量透过介质面

35、，到另一介质内接着传播，称为。A驻波 B兰姆波 C折射波 D波型转换4为了消退应变片的温度误差，可采纳的温度补偿措施包括：单丝自补偿法、和桥路补偿法。A双丝自补偿法 B温度补偿法C电流补偿法 D电压补偿法5超声波的频率高，因而，绕射现象小，方向性好，能够成为射线而定向传播。A速度快 B波长短C波长长 D速度慢6在相同的电压和相同幅值的光强度下，当入射光以不同的正弦交变频率调制时，光敏元件输出的光电流J和灵敏度S随调制频率厂改变的关系：称为。A频率特性 B光照特性 C光谱特性 D伏安特性7当超声波在一种介质中传播到界面或遇到另一种介质，其方向不垂直于界面时，将产生声波的反射、折射及现象。A表面波

36、 B兰姆波C驻波 D波型转换8当光敏元件加肯定电压时，光电流J与光敏元件上光照度E之间的关系，称为。A温度特性 B光照特性C光谱特性 D伏安特性9压电材料起先丢失压电特性时的温度叫。A压电系数 B弹性系数C机电耦合系数 D居里点10粘贴应变片做好打算工作后要进行如下工作。A涂胶一贴片一复查一接线一防护 B涂胶一接线一复查一贴片一防护C涂胶一防护一贴片一复查一接线 D涂胶一接线一贴片一复查一防护三、综合题1如图所示结构可用于转速测量，由导磁材料制成的齿轮安装在被测转轴上，与转轴一起旋转。简述其工作原理。2用涡流传感器测量金属板厚度时是否须要恒温，为什么?3如图所示是带有等位环的平板电容器结构原理

37、图，请介绍等位环的作用。4两金属应变片和阻值均为l20，灵敏系数k=2；两应变片一受拉，另一受压，应变均为1000。两者接人直流电桥组成半桥双臂工作电桥，电源电压U=5V。求： R和RR；电桥的输出电压U试题答案及评分标准一、简答题1静特性：指传感器在输入量的各个值处于稳定状态时的输出与输人关系，即当输入量是常量或改变极慢时，输出与输入的关系。2线性度：实际测试获得静特性曲线后，采纳直线拟合的方法来线性化，输出输入的校正曲线与其拟合直线之间的最大偏差，就称为非线性误差或线性度。3涡流效应：当一块金属导体放置在一改变的磁场中，导体内就会产生感应电流，这种电流像水中旋涡那样在导体内转圈，所以称之为

38、电涡流或涡流。这种现象就称为涡流效应。 4磁电式传感器有何优点?磁电式传感器干脆从被测物体汲取机械能并转换成电信号输出，输出功率大，性能稳定，工作不须要电源，调整电路简洁，灵敏度较高，一般不须要高增益放大器。二、选择题1D 2B 3C 4A 5B6A 7D 8B 9D l0A三、综合题1如图所示结构可用于转速测量，由导磁材料制成的齿轮安装在被测转轴上，与转轴一起旋转。简述其工作原理。答案要点：如图所示是一种开磁路变磁通式传感器的结构，齿轮安装在被测转轴上，与转轴一起旋转。当齿轮转动时，每转过一个齿，磁路的磁阻就改变一次，因而磁通量也改变一次，线圈中产生感应电动势。线圈中产生的感应电动势的改变频

39、率等于齿轮的齿数和转速的乘积，由此可测得转轴的转速。2用涡流传感器测量金属板厚度时是否须要恒温，为什么?答案要点：导体的电阻率p随温度改变，在较小的温度范围内导体的电阻率D与温度关系为线性关系。在其他条件不变的状况下，导体电阻率的变更可导致涡流传感器输出信号的改变，引起测量误差，所以用涡流传感器测量金属板厚度时须要恒温。3如图所示是带有等位环的平板电容器结构原理图，请介绍等位环的作用。答案要点：使电极2的边缘电力线平直，两电极间的电场基本匀称，消退和减小边缘效应，提高电容传感器的灵敏度和线性度。4两金属应变片R。和R。阻值均为12022，灵敏系数忌一2；两应变片一受拉，另一受压，应变均为100

40、0z。两者接人直流电桥组成半桥双臂工作电桥，电源电压U一5V。求：电桥的输出电压答案要点：灵敏系数则传感器与测试技术题库及答案二一、填空题1干扰的来源有、和供电系统干扰2PID调整器由、和三部分组成。3集成运算放大器单元电路包括：输入级、和四部分。4直流电动机由定子和两大部分组成，在它们之间是二、选择题1集成稳压器7808的输出电压为。A8V B一8V C12V D79V2317为集成稳压器。A三端可调正电压输出 B固定型正电压输出C固定型负电压输出 D三端可调负电压输出3若希望电压比较器在输入小于+5V时输出电压为高电平，而在输入大于+5V时输出电压为低电平。则应选用。A反相端输入差动电平检

41、测器 B过零比较器C窗口比较器 D回差电压比较器4模拟电压比较器同运算放大器的主要区分是：模拟电压比较器中的工作于。A开环状态 B负反馈状态C深度负反馈状态 D高电平状态5单向晶闸管有三个引脚：A、K和G，其中K为。A阳极 B阴极C限制极 D门级6构成的H桥电路，上下桥臂不会发生同时导通现象。A全部采纳NPN型晶体管B采纳NPN和PNP型晶体管射极跟随器C采纳PNP和NPN型晶体管集电极跟随器D全部采纳PNP型晶体管7运算放大器中的单元用于设置各级放大电路的静态工作点。A输入级 B输出级C中间级 D偏置电路8具有制动作用的不行逆PWM变换器中，所谓制动是指。A电动机的电磁转矩和速度方向相反 B

42、电动机做加速运动C电动机做减速运动 D电动机驱动负载转矩匀速运行9L292是一种芯片。A转速电压变换器 B步进电机环形安排器C细分电路 D功率驱动芯片10LM3524事实上是一个变换器。A脉冲电压 B电压速度C电压电流 D电压脉冲三、简答题1推导图l所示电路中iL的表达式。2三相步进电机的工作方式有哪几种?其中单、双、拍各是什么意思?3单向晶闸管的关断条件是什么?4就硬件方面讲，产生SPWM限制信号的方法主要有哪几种?四、分析计算题1写出图2的传递函数。2分析图3所示无制动作用的不行逆PWM变换器电路在负载电流较大时的电压、电流波形，电流流通路径，以及晶体管和二极管的导通状况。3请说明图4所示

43、电路的工作原理，图中的各元件的作用是什么?五、用7805设计62V电源。试题答案及评分标准一、填空题1空间干扰 过程通道干扰2比例 积分 微分3中间放大级 输出级 偏置电路4转子 空气隙二、选择题1A 2A 3A 4A 5B6B 、7D 8A 9D l0D三、简答题1解：依据志向运算放大器的虚断和虚短可得2三相步进电机一般有单三拍、六拍及双三拍等工作方式。单、双、拍，的意思是：单指定子绕组每次切换前后只有一相通电；双指每次有两相定子绕组通电；拍，指从一种通电状态转到另一种通电状态。3关断条件是指晶闸管从导通到阻断的条件。关断条件要求流过晶闸管中的电流小于保持晶闸管导通所需的电流，即维持电流。通

44、常当晶闸管的阳极已加上了正电压并导通的状况下，要削减晶闸管中的电流有两种方法：一种是降低电压，另一种是增大晶闸管回路的串联电阻。4采纳微处理器采纳专用大规模集成电路。采纳微处理器和专用大规模集成电路相结合。四、分析计算题1解：不考虑符号，由答图1可列出下面的方程可得传递函数为2如答图2所示在一个开关周期内，当0。时，为正，T。饱和导通，电源电压Us通过71沿回路1加到电动机电枢两端。当。T时，为负，T。截止，电枢失去电源电压，经二姆管D沿回路2续流。3解：7406是一个OC门反相器。7406的作用是驱动LED。当单片机的lo端口为高电平常，反相器输出低电平，LED发光；当单片机io端口为低电平

45、常，反相器输出开路，没有电流流过LED，LED熄灭。R为限流电阻，当电源电压为5V时，LED工作电流取lOmA，限流电阻计算如下：式中：Vcc电源电压；VF输入端发光二极管的压降；Vcs输入信号低电平电压；JF发光二极管的工作电流。五、解：电源电路采纳电阻升压法，详细电路如下：由电路可知输出电压U为：取R2=10012，则传感器与测试技术题库及答案三一、选择题（选择正确的答案，将其对应的字母填入横线上方。每空3分，共12分）1应变片绝缘电阻是指已粘贴的应变片的 之间的电阻值。A覆盖片与被测试件B基片与被测试件C引线与被测试件D敏感栅与被测试件2如图所示的结构由线圈、铁芯、衔铁三部分组成的。线圈

46、套在铁芯上，在铁芯与衔铁之间有一个空气隙，空气隙厚度为艿。传感器的运动部分与衔铁相连。当外部作用力作用在传感器的运动部分时，衔铁将会运动而产生位移，使空气隙艿发生改变。这种结构可作为传感器用于-。A静态测量B动态测量C既不能用于静态测量，也不能用于动态测量D静态测量和动态测量3磁头的作用是读取磁栅上记录信号，按读取信号方式的不同，磁头可分为磁头和_磁头。A静态 B动态C鉴幅 D鉴相二、简答题（每小题5分共20分）4动特性：5线性度：6塞贝克效应：7莫尔条纹：三、问答题（每小题6分，共24分）8传感器是由哪几部分组成？各有何功能？9测定频响函数的方法是什么？常用标准输入信号有哪几种？10磁电式传

47、感器有何优点？11超声波的波型有几种？是依据什么来分类的？四、综合题（共44分）12.螺管型电感传感器与变气隙型电感传感器各有何优缺点？（14分）13.画出霍尔钳形电流表的工作原理图，并简述其工作原理。（16分）14.接近开关有哪些？选择接近开关应考虑哪些因素？（14分）试题答案及评分标准（供参考）一、选择题（每空3分，共12分）1C 2D 3AB二、简答题（每小题5分，共20分）4动特性：指传感器对随时间改变的输入量的响应特性。5线性度：实际测试获得静特性曲线后，采纳直线拟合的方法来线性化，输出输入的校正曲线与其拟合直线之间的最大偏差，就称为线性度（或非线性误差）。6塞贝克效应：两种不同的导

48、体或半导体A和B组成一个回路，其两端相互连接，只要两结点处的温度不同，一端温度为T，另一端温度为To，则回路中就有电流产生，即回路中存在电动势，称为热电势，这种现象称为塞贝克效应。7奠尔条纹：将栅距相同的两块光栅的刻线面相对重叠在一起，并且使二者栅线有很小的交角口，这样就可以看到在近似垂直栅线方向上出现明暗相间的条纹，称为莫尔条纹。莫尔条纹是基于光的干涉效应产生的。三、问答题（每小题6分，共24分）8传感器是由哪几部分组成？各有何功能？答：传感器一般由敏感元件、转换元件、转换电路三部分组成。敏感元件干脆感受被测量，并输出与被测量成确定关系的某一种量。转换元件接受敏感元件的输出并把输入转换成电路参量。转换电路把转换元件输出电路参数转换成电量输出。9测定频响函数的方法是什么？常用输入标准信号有哪几种？答：确定频响函数的方法是以标准信号输入，测出其输出信号，从而求得须要的特性。输入的标准信号有正弦信号、脉冲信号和阶跃信号。10磁电式传感器有何优点？答：磁电式传感器干脆从被测物体汲取机械能并转换成电信号输出，输出功率大，性能稳定，工作不须要电源，调理电路简洁，灵敏度较高，一般不须要高增益放大器。11.超声波的波型有几种？是依据什么来分类的？答：超声波的波型有纵波、横波、表面波（亦称瑞利波）、兰姆波。依据超声场中质点的振动与声能量传播方向之