1填空题答案

总复习一、选择题1. 采用直接浇口的单型腔模具，适用于成型 B 塑件，不宜用来成型 A 的塑件。

A、平薄易变形B、壳形C、表面要求高D、较复杂形状2. 通过浇口进入型腔的熔料应呈 B 关进入腔内。

A、紊流B、层流C、涡流3. 护耳浇口专门用于透明度高和要求无内应力的塑件，它主要用于 B 等流动性差和对应力较敏感的塑料塑件。

A、ABSB、有机玻璃C、尼龙D、聚碳酸酯和硬聚氯乙烯4. 带推杆的倒锥形冷料穴和圆形冷料穴适用于 B 塑料的成型。

A、硬聚氯乙烯B、弹性较好的C、结晶型5. 推管推出机构对软质塑料如聚乙烯、软聚氯乙烯等不宜用单一的推管脱模，特别对薄壁深筒形塑件，需用 C 推出机构。

A、推板B、顺序C、联合D、二级6.下列用于制作透明塑料件的是 BA.聚甲醛（POM）B.聚碳酸酯（PC）C.聚丙烯（PP）D.聚乙烯（PE）7.下列用于制造齿轮、轴承的塑料是 CA.聚苯乙烯（PS）B.聚甲基丙烯酸甲酯（PMMA）C.聚酰胺（PA）D.聚氯乙烯（PVC）8.助剂的加入可改善塑料的某些性能，下列何种助剂加入可提高其流动性 CA.填充剂B.稳定剂C.润滑剂D.固化剂9.尼龙注射制品，成型后为消除内应力，稳定尺寸，达吸湿平衡，可用的后处理方法是CA.淬火B.退火C.调湿D.回火10.有些塑料易吸水，故注射成型前需干燥，有些塑料则不需要，下列一般不需干燥的塑料是 CA.PCB.PMMAC.PED.PA11.下列那种情况不属于塑件表面质量 DA熔接痕 B塑件翘曲变形 C塑件有气泡 D塑件强度或刚度不够12.硬质塑料比软质塑料脱模斜度 CA相等 B小 C大 D不能确定13.塑件壁厚太薄会造成 CA汽泡、凹陷 B收缩不均 C注不满（缺料） D没有影响14.加强筋的方向应尽量与料流方向 BA.垂直B.一致 C .45° D.没有关系15.不符合塑件外形设计原则的是 CA.外形尽可能美观B.转角处应有圆弧C.无需考虑模具结构D.在满足使用条件下，有利于成型，避免侧向抽芯机构16.金属嵌件预热的目的是 DA.用于加热塑料B.提高嵌件的强度C.有利于排气D.降低嵌件周围塑料的应力17.塑件上的文字，从模具制造考虑，最好采用 CA.凸字B.凹字C.凹坑凸字 D各种情况效果一样18.关于塑件上设加强筋，下列说法错误的是 DA.可增加制品强度和刚度B.可改善制品成型时充模状态C.避免塑件产生缩孔、气泡D.外形美观19.下列反映注射机加工能力的参数是 CA、注射压力B、合模部分尺寸C、注射量D、动模板行程20.对于一副塑料模，影响其生产效率的最主要因素是 CA、注射时间B、开模时间C、冷却时间D、保压时间21.在一个模塑周期中要求注射机动模板移动速度是变化的，合模时的速度 CA、由慢变快B、由快变慢C、先慢变快再慢D、速度不变22.型号XS-ZY-125的注射机各参数中 AA、Z表示注射B、125表示锁模力C、S表示成型D、X表示塑料23.一注射塑件采用PP材料，要求得到的制品密度大，强度，硬度高，刚度，耐磨性好，则其成型工艺条件应选用 DA、熔体温度和模具温度高B、熔体温度和模具温度低C、熔体温度高和模具温度低D、熔体温度低和模具温度高24.大多数的热塑性塑料注射模要求模温在 BA、10～30°CB、40～80°CC、110～150°CD、230～260°C25.模腔数目通过注射量计算为2.3，通过锁模力计算为6.5，通过塑化能力计算为8.3，一般精度，要求按可能的最大模腔数制造，则选择的模腔数目应该为 2 。

考研英语一完形填空试题及答案解析Section I Use of EnglishDirections:Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on the ANSWER SHEET. (10 points)Fluid intelligence is the type of intelligence that has to do with short-term memory and the ability to think quickly, logically, and abstractly in order to solve new problems. It 1 in young adulthood, levels out for a period of time, and then 2 starts to slowly decline as we age. But 3 aging is inevitable, scientists are finding out that certain changes in brain function may not be.One study found that muscle loss and the 4 of body fat around the abdomen are associated with a decline in fluid intelligence. This suggests the 5 that lifestyle factors might help prevent or 6 this type of decline.The researchers looked at data that 7 measurements of lean muscle and abdominal fat from more than 4,000 middle-to-older-aged men and women and 8 that data to reported changes in fluid intelligence over a six-year period. They found that middle-aged people 9 higher measures of abdominal fat 10 worse on measures of fluid intelligence as the years 11 .For women, the association may be 12 to changes in immunity that resulted from excess abdominal fat; in men, the immune system did not appear to be 13 . It is hoped that future studies could 14 these differences and perhaps lead to different 15 for men and women.16 , there are steps you can 17 to help reduce abdominal fat and maintain lean muscle mass as you age in order to protect both your physical and mental 18 . The two highly recommended lifestyle approaches are maintaining or increasing your 19 of aerobic exercise and following Mediterranean-style 20 that is high in fiber and eliminates highly processed foods.1. [A] pauses [B] returns [C] peaks[D] fades2. [A] alternatively [B]formally [C]accidentally[D] generally3. [A] while [B] since [C] once[D] until4. [A] detection [B] accumulation [C] consumption[D] separation5. [A] possibility [B] decision [C] goal[D] requirement6. [A] delay [B] ensure [C] seek[D] utilize7. [A] modified [B] supported [C] included[D] predicted8. [A] devoted [B] compared [C] converted[D] applied9. [A] with [B] above [C] by[D] against10. [A] lived [B] managed [C] scored[D] played11. [A] ran out [B] set off [C] drew in[D] went by12. [A] superior [B] attributable [C] parallel[D] resistant13. [A] restored [B] isolated [C] involved[D] controlled14. [A] alter [B] spread [C] remove[D] explain15. [A] compensations [B] symptoms [C] demands[D] treatments16. [A] Likewise [B] Meanwhile [C] Therefore[D] Instead17. [A] change [B] watch [C] count[D] take18. [A] well-being [B] process [C] formation[D] coordination19. [A] level [B] love [C] knowledge [D] space20. [A] design [B] routine [C] diet[D] prescription1. 【答案】C（peaks）【解析】逻辑关系题。

It was a busy morning,about 8:30,when an elderly gentleman in his 80s came to thehospital .I heard him saying to the nurse that he was in a hurry for all appointment（约会）at 9:30The nurse had him take a 36 in the waiting area, 37 him it would be at least 40Minutes 38 someone would be able to see him I saw him 39 his watch and decided,since I was 40 busy—my patient didn't 41 at the appointed hour, I would examinehis wound .While taking care of his wound．I asked him if he had another doctor’s appointmentThe gentleman said no and told me that he 42 to go to the nursing home to eatbreakfast with his 43 .He told me that she had been 44 for a while and that she had aspecial disease I asked if she would b e 45 if he was a bit late。

He replied that she 46knew who he was，that she had not been able t0 47 him for five years now。

生物必修一试题填空及答案一、填空题1. 染色体是由 DNA 和蛋白质组成的结构体，位于细胞的核内。

2. 不同基因决定了个体的性状。

3. 酶通过降低反应活化能来促进化学反应的进行。

4. 光合作用是通过光能和化学能转化将二氧化碳和水转化为有机物和氧气。

5. 染色体异常可能导致遗传疾病的发生。

6. 环境因子对基因表达有重要影响。

7. 人类的性别遗传由父本决定。

8. 核糖体位于细胞质中，参与蛋白质合成。

9. 有机化合物的共有特征是它们都含碳。

10. 酵素的作用在化学反应中是具有专一性的。

二、简答题1. 利用遗传性状的观察可以判断亲子关系。

2. 细胞膜起到细胞内外物质交换的调控作用。

3. 光合作用是地球上维持生物圈的重要过程之一。

4. 精子和卵子之间的结合是受精作用。

5. 基因突变是生物进化的重要驱动力之一。

三、解答题1. DNA的复制过程是如何保证遗传信息的传递准确性的？DNA复制过程是由DNA聚合酶酶所催化的。

在复制过程中，DNA双链会被解开，然后通过DNA聚合酶在每个模板链上添加互补的碱基对，形成新的双链。

DNA聚合酶的选择性使得每个核苷酸碱基只能与互补的碱基配对，从而保证了复制的准确性。

此外，还存在其他一系列与复制有关的酶和辅助蛋白，它们协同工作以确保复制的顺利进行，从而保证遗传信息的传递准确性。

2. 光合作用和呼吸作用的关系是什么？光合作用和呼吸作用是生物体能量代谢的两个重要过程。

光合作用通过吸收光能将二氧化碳和水转化为有机物和氧气，并释放出化学能。

而呼吸作用则是利用有机物在细胞内氧化分解，释放出化学能，并将能量转化为细胞所需的三磷酸腺苷（ATP）。

光合作用和呼吸作用可以看作是互为逆反应，二者在物质和能量转化上相互联系、相互依赖，共同维持着生物体的能量和物质平衡。

总结：生物必修一试题填空及答案共包括填空题、简答题和解答题三个部分。

填空题测试了对生物相关知识概念的理解和记忆；简答题要求回答问题，展开解释；解答题则需要更全面地解释相关概念和现象。

一. 填空题1、一线性时不变系统，输入为x（n）时，输出为y（n）；则输入为2x（n）时，输出为2y(n) ；输入为x（n-3）时，输出为y(n-3) 。

2、从奈奎斯特采样定理得出，要使实信号采样后能够不失真还原，采样频率fs与信号最高频率f max关系为：fs>=2f max。

3、已知一个长度为N的序列x(n)，它的离散时间傅立叶变换为X（e jw），它的N点离散傅立叶变换X（K）是关于X（e jw）的N 点等间隔采样。

4、有限长序列x(n)的8点DFT为X（K），则X（K）= 。

5、用脉冲响应不变法进行IIR数字滤波器的设计，它的主要缺点是频谱的交叠所产生的现象。

6．若数字滤波器的单位脉冲响应h（n）是奇对称的，长度为N，则它的对称中心是(N-1)/2 。

7、用窗函数法设计FIR数字滤波器时，加矩形窗比加三角窗时，所设计出的滤波器的过渡带比较窄，阻带衰减比较小。

8、无限长单位冲激响应（IIR）滤波器的结构上有反馈环路，因此是递归型结构。

9、若正弦序列x(n)=sin(30nπ/120)是周期的,则周期是N= 8 。

10、用窗函数法设计FIR数字滤波器时，过渡带的宽度不但与窗的类型有关，还与窗的采样点数有关11．DFT与DFS有密切关系，因为有限长序列可以看成周期序列的主值区间截断，而周期序列可以看成有限长序列的周期延拓。

12．对长度为N的序列x(n)圆周移位m位得到的序列用x m(n)表示，其数学表达式为x m(n)=x((n-m))N R N(n)。

13．对按时间抽取的基2-FFT流图进行转置，并将输入变输出，输出变输入即可得到按频率抽取的基2-FFT流图。

14.线性移不变系统的性质有交换率、结合率和分配律。

15.用DFT近似分析模拟信号的频谱时，可能出现的问题有混叠失真、泄漏、栅栏效应和频率分辨率。

16.无限长单位冲激响应滤波器的基本结构有直接Ⅰ型，直接Ⅱ型，串联型和并联型四种。

17.如果通用计算机的速度为平均每次复数乘需要5μs，每次复数加需要1μs，则在此计算机上计算210点的基2 FFT需要10 级蝶形运算，总的运算时间是______μs。

《Linux操作系统》系题库1_填空题及答案1. 在Linux系统中，以___ 方式访问设备。

2. Linux内核引导时，从文件____中读取要加载的文件系统。

3.___ 目录用来存放系统管理员使用的管理程序。

4. 链接分为：___ 和____。

5. 某文件的权限为：drw-r--r--，用数值形式表示该权限，则该八进制数为：___，该文件属性是___ 。

6. 前台起动的进程使用___终止。

7. 安装Linux系统对硬盘分区时，必须有两种分区类型：___ 和___ 。

8. 编写的Shell程序运行前必须赋予该脚本文件___权限。

9. 系统交换分区是作为系统___ 的一块区域。

10. 唯一标识每一个用户的是用户___和用户名。

11. 在Linux系统中所有内容都被表示为文件，组织文件的各种方法称为___ 。

12. DHCP可以实现___ IP 地址分配。

13. Ping命令可以测试网络中本机系统是否能到达___，所以常常用于测试网络的连通性。

14. vi编辑器具有两种工作模式：___ 和___ 。

15. 可以用ls –al命令来观察文件的权限，每个文件的权限都用10位表示，并分为四段，其中第一段占 1 位，表示文件类型，第二段占3位，表示___ 对该文件的权限。

16. DNS实际上是分布在internet上的主机信息的数据库，其作用是实现___和___之间的转换。

17. 在Linux系统上做备份可以有两种类型：___ 和___ 。

其中前者是指对___ 的备份，后者是指对___和___。

18. CD-ROM标准的文件系统类型是___。

19. Linux使用支持Windows 9.x/2000长文件名的文件系统的类型是___。

20. 在Linux系统中，用来存放系统所需要的配置文件和子目录的目录是___。

21. 结束后台进程的命令是___。

22. 进程的运行有两种方式，即___和___ 。

23. Links分为___和___。

西方音乐史填空题练习（一）丨附答案01【古希腊古罗马时期】1.古希腊的《荷马史诗》包括两部大型史诗【《伊里亚特》】和【《奥德赛》】，以公元前I2世纪的【特罗伊】战争为题材，由行吟诗人边弹里尔琴边诵唱。

2.古希腊时期由诗人和着里尔琴演唱的自创诗歌称为【抒情诗】。

3.古希腊时期的颂歌皆为【合唱】形式，分为太阳神颂歌和【酒神】颂歌两种，后者在公元前6世纪发展为戏剧形式【悲剧】。

4.古希腊时期集戏剧、诗歌、音乐与舞蹈于一体的综合艺术形式称为【悲剧】。

5.古希腊的托诺斯有【多里亚】、【弗里几亚】和利底亚等，它们的名称来自于古希腊的部族名称。

6.古希腊的音乐理论家有【亚里斯多塞诺斯】。

7.欧洲最早产生的管风琴是在古罗马时期由埃及工程师发明的【水力管风琴】。

8.古罗马最具代表性的音乐类别为【军乐】。

02【中世纪时期】1.【圭多】是中世纪杰出的音乐理论家和实践教育家，著作为《辨及微芒》，他的理论法则是所有中世纪音乐理论的基础。

2.中世纪音乐理论家【圭多】发明了ut、re、mi、fa、sol、la的六声音阶唱名法，并且确定了用几条平行线来记录音高的方法，中世纪时被广泛采用的【纽姆四线】谱，就是在他的理论基础上形成。

3.中世纪的管风琴根据尺寸形状大小可分为固定式管风琴和【便携式】管风琴。

4.14世纪在法国处于巅峰的音乐艺术被称为【新艺术】，与13世纪的【古艺术】相区别。

5.14世纪“新艺术”的音乐成就集中体现在新体裁【等节奏经文歌】的结构原则中，在这种体裁的定旋律声部，固定旋律组“克勒”和重复节奏型“塔列亚”以不同的方式加以结合。

6.14世纪法国“新艺术”音乐风格的代表人物是【马肖】，意大利“新艺术”音乐风格的代表人物是【兰迪尼】。

7.14世纪意大利最具代表性的世俗音乐体裁有【牧歌】、巴拉塔和狩猎曲。

8.中世纪的【教会】调式系统以古希腊音乐理论为基础，同时受到东方教会八调式系统的影响而形成，它们的名称沿用了古希腊托诺斯的名称如多里亚、弗里几亚等。

人教版英语八年级上册unit1--6单元课文完形填空习题专练8A Unit 1 Reading AWe held a meeting after school. Lucy, Tony, Joyce, Jessica and I were①the meeting.First we decided to elect the chief editor.Tony suggested Joyce. He said, “We should choose Joyce because she②experience. She was the editor of her class newspaper last year.”Then we all voted③her. We elected Joyce to be the chief editor.Then Joyce took charge of the meeting. She said, “We④elect a secretary now.” she asked for suggestions.Jessica said, “Ben should be the secretary, because he has experience too. He was the secretary of the Music Club last year.”Then the others voted for me. They elected me to be the secretary. I started⑤notes.Joyce said, “Lucy, Tony, and Jessica, you will be editors of the paper. You will be responsible for different⑥of the paper.”Lucy asked, “Which sections will we have?”Joyce said, “Talk it over⑦yourselves. We will decide at the next meeting.”Then we made a list of some other things to discuss. For example, how often should we publish the paper? Should it be free for⑧, or shouldthey pay for it? What should we call it?We considered the last question quickly. Lucy said, “We ought to⑨it the Mayfield Sun.”“What about the Mayfield Mirror or the Mayfield Star?” Jessica said. Because we all had different ideas, Joyce said, “We would think about this a bit⑩. We will make a decision about the name at the next meeting.”We agreed to conclude the meeting then. We arranged to have the next meeting in one week’s time.（）①A. in B. on C. at（）②A. have B. has C. had（）③A. to B. by C. for（）④A. ought to B. need C. must（）⑤A. take B. took C. taking（）⑥A. sections B. parts C. kinds（）⑦A. to B. between C. among（）⑧A. students B. teachers C. readers（）⑨A. name B. call C. named（）⑩A. time B. long C. longer8A unit 1 答案Key: CBCACACCBC8A Unit 1 listening BLast week was a very interesting week.Last Monday, our new music room opened. We have many new instruments and a lot of equipments. It opened with a special concert. The concert included a①and several songs. The school band played many of my favourite songs,②Hey Jude by the Beatles. Many students came to the concert with their parents. Everyone enjoyed the evening.Last Thursday evening, the photo club showed some old photos of Guangzhou③. These photos belonged to a student’s mother. Last Saturday, the club also had the members take photos of the same places as ④in the old photos. It is very interesting to see⑤the places have changed.Last Sunday, our school’s⑥volleyball team played and won their last game. Congratulations everyone! The other team from No.7 Middle School, played very well, but in the end they lost the game. Many⑦fans from both schools watched the game.（）①A. play B. game C. match（）②A. including B. such as C. for example（）③A. in the 1950 B. in 1950s C. in the 1950s（）④A. this B. these C. those（）⑤A. / B. how C. what（）⑥A. girl B. girl’s C. girls’（）⑦A. big B. excited C. crazyKey: AACCBCB8A Unit 1 More Practice AZhen Hui was outside the English teacher’s room. She loves English very much. She wanted to discuss①English exercise with her English teacher. She looked a little②nervous.Li Ming left his bag in the playground and he walked back there to③it. When he found it, he looked quite happy.After school, Wang Gang rode out of the school④. He and his best friends planned to go to the cinema. He looked excited.Li Ye felt sick. He went to the⑤. The nurse told him to⑥his mother because he had a high⑦.Sally likes⑧books. She often borrows many books from the school library. She was on her way to the library to return the books.At break, Jia Ming ran to the sports field to play football with his classmates. They⑨practice a lot because they have a match with Class 2 next Wednesday.（）①A. a B. an C. the（）②A. bit B. more C. /（）③A. get B. find C. save（）④A. / B. door C. gate（）⑤A. clinic B. hospital C. restaurant（）⑥A. call B. ask C. phone（）⑦A. ill B. sick C. fever（）⑧A. read B. to read C. reading（）⑨A. need B. have to C. mustKey: BAACACCBB8A Unit 2 Reading ALucy Mr Ken, Why do you like working as a detective?Ken I hope to protect the innocent①find the guilty. Well, let me tell you about a recent case. Mr Li is a rich man. He lives aloneand enjoys②things. He bought a vase③two milliondollars and only showed it to his friends Jill and Jenny. Then helocked it in the safe inside his house. That night someone stoleit, Li reported the④, and I went to his house to look for clues. Lucy Did you find any?Ken Yes, a black pearl earring near the⑤safe. Outside the open window, I also saw a lot of mud on the wet ground. Inside theroom, the carpet was very clean. Then I questions Jill and Jenny.They⑥denied stealing the vase, but I notice Jill wearing ablack pearl necklace. It has the same design as the earring. Luck So Jill was the thief?Ken I wasn’t sure. I needed proof. I showed Jill the earring. She admitted, “I t’s⑦. But someone stole it⑧my house a weekago.” I checked her story. It was true.Lucy I see, so Jill was no longer a suspect. However, what about your⑨clues—the mud outside and the clean carpet inside?Ken They only⑩one thing—no thief broke into Li’s house. So I questioned Li and, in the end, he admitted stealing his own vase.He said, “I bought insurance for the vase. I stole it for theinsurance money.”Li also stole Jill’s earring. He wanted tomake Jill go to jean instead of himself.Lucy Is Li behind bars now?Ken Yes, and Jill is free.（）①A. and B. also C. as well as（）②A. collect B. to collect C. collecting（）③A. for B. about C. more than（）④A. thief B. theft C. robbery（）⑤A. open B. opened C. opening（）⑥A. are B. both C. all（）⑦A. me B. my C. mine（）⑧A. in B. from C. inside（）⑨A. other B. another C. the other（）⑩A. mean B. meant C. meaningKey: CCABABCBAB8A Unit 2 Listening BI wanted to see Jill again, so on my way home①work, I stopped at a telephone box and called her. I invited her to the cinema②evening. She agreed to go with me, so we arranged to meet outside the cinema at seven o’clock.At around quarter past six, I put on my jacket and hat and left the house. I locked the door, but I③to turn off the light in the living room.At that time of day, it is very difficult to④a taxi. I could not find one, so I took the bus⑤. I arrived at the cinema around ten minutes early. Next to the cinema is a bookshop, so I went in to look around⑥I waited for Jill. I started reading a book about world-fames crimes. It was really interesting! In fact, it was so interesting⑦I forgot the time. I was late.When I arrived, Jill was really angry. She refused to speak to me at first. How could I make her happy? “I know!” I thought. “I will buy her some ⑧.” I went to the sweet shop and bought a large bar of chocolate. I was right—it did make her happy, and we went in to see the film.（）①A. to B. for C. from（）②A. in B. at C. that（）③A. forget B. forgot C. remember（）④A. get B. take C. have（）⑤A. instead B. instead of C. to instead（）⑥A. / B. when C. while（）⑦A. so B. that C. lead to（）⑧A. roses B. toys C. chocolateKey: CCBAACBC8A Unit 2 More Practice AYesterday was a very busy day. I solved two cases. The first case was about a bank robbery. A man entered a bank in the city centre with a gun. He took away thousands of①. The bank manager called the police, but it was too late. The robber②away. The suspect in the case was Tim Smith. At first, Tim denied③the robber. He said he was watching a film in the cinema at the time of the robbery. However, I had proof. One of the customers in the bank at that time took a photo. It showed Tim Smith in the bank,④ a gun. I showed the photo to Tim. He⑤admitted his crime.In the second case, a lady called Susan Brown bought a beautiful vase forfifty thousand dollars. The owner of the shop called the police because Susan had used⑥banknotes to pay for the vase. We⑦her to the police station. She said that she got the notes from the bank and that the bank clerk must have⑧her. However, when I searched her flat, I found half a million dollars in forged notes. She kept them in a safe in the wall. Susan then admitted printing the notes herself. I returned the beautiful vase to the shop.（）①A. money B. yuans C. dollars（）②A. run B. went C. got（）③A. making B. being C. having（）④A. carry B. carried C. carrying（）⑤A. then B. had to C. still（）⑥A. forget B. forgot C. forged（）⑦A. took B. brought C. called（）⑧A. fooled B. joked C. jokingKey: CCBCACBA8A Unit 3 Reading AHidden helpersNot so many years ago, you hardly①saw computers. Now they seem to be everywhere.There are also many hidden “computers” in your home, but you②be unaware of them. For example, there may be one inside your TV set, telephone or washing machine.You are more③on computers than you know.What kind of jobs can a computer do?Computers are probably the best calculators in the world. They are faster ④calculating than people, and they rarely give wrong answers. They can also type, print and draw things like diagrams and graphs. They can teach you many things and also play games with you. More⑤, they can operate railways (⑥the underground) and fly planes and spaceships. For⑦reasons, we sometimes call them “electronic brains”.Is a computer cleverer than I am?The answer to this question is, for the time being, “No”. You have⑧understanding of the meaning of things than computers and can also create new ideas of you own. However, one day computers may be able to do⑨things than a human brain. In the future, they may even be better at doing their jobs than doctors, judges and teachers.This raises interesting questions. How⑩computers change our lives? Will we have nothing to do? Will computers make our lives better or worse in the future?（）①A. / B. ever C. even（）②A. should B. may C. might（）③A. dependent B. interested C. enjoy（）④A. in B. on C. at（）⑤A. important B . importantly C. useful（）⑥A. / B. like C. such as（）⑦A. that B. this C. these（）⑧A. great B. greater C. greatly（）⑨A. more B. many C. much（）⑩A. will B. can C. couldKey: BCACBBCBAA8A Unit 3 Reading BHow do we give computer instructions?We give a computer instructions①putting different programs into it. “Computer programmers” write computer programs. It is essential for②people not to make mistakes.③, the computer will not work well.A computer needs different programs to do different④. For example, playing games, writing letters and drawing pictures all need different programs. There are also different languages for different programs.⑤a program, people need to know this language. Sometimes a computer programmer may know many different languages.⑥, computer languages are not spoken languages like Chinese or English⑦writtenlanguages. Also, only the computer and the programmer can understand them!CD-ROMs and DVE-ROMsMany computers have CD-ROM or DVD-ROM⑧. A CD-ROM can hold over 300,000 pages of writing, and may also contain pictures and sounds. A DVD-ROM can hold even more⑨. So, you can use them on you computer to read about the most famous people in the world today. You can also see photographs⑩videos of people, and even listen to them speaking. According to some people, CD-ROMs and DVD-ROMs will become even more popular than books.（）①A. by B. with C. in（）②A. the B. this C. these（）③A. In fact B. However C. Otherwise（）④A. things B. jobs C, work（）⑤A. Write B. To write C. Writing（）⑥A. In fact B. However C. Otherwise（）⑦A. but B. it’s C. so（）⑧A. / B. driver C. drives（）⑨A. letters B. words C. information（）⑩A. or B. and C. /Key: ACCBBBACCA8A Unit 3 More Practice BA research team in the USA first had the idea of①computers together in the 1960s. They wanted computers in universities, research departments and the military to communicate with ②and share information. At that time, computers were bigger than fridges. People could not move them③. Computers were also complicated and difficult to use.Slowly, more and more people started to link their computers together. Then businessmen started to use the Internet④. Today, people all over the world are⑤the Internet.There is a wide range of services on the Internet. For example, we can use it to communicate with other people. The most popular way to communicate is through electronic mail, or “e-mail”. We can also use services such as MSN messenger⑥Skype. We can use these services to send instant messages to people near of far away.The Internet⑦us to use to World Wide Web (also⑧as WWW or the Web). The web is many connected pages of information. We can use the Web to read news and learn about our favourite sports stars or singers. The Internet⑨changed our lives. Now we can contact the whole world with the computers⑩our homes.（）①A. link B. linked C. linking（）②A. each other B. the others C. the other（）③A. easy B. easily C. easier（）④A. too B. also C. as well（）⑤A. use B. used C. using（）⑥A. or B. and C. with（）⑦A. allow B. allows C. allowing（）⑧A. called B. named C. known（）⑨A. have B. haven C. has（）⑩A. in B. on C. atKey: CABACABCCA8A Unit 4 Listening BGood evening, everyone. Welcome to “History①a minute”. Tonight, we are going to talk about the ancient Olympic Games.The first Olympic Games②thousands of years ago in Greece. People started the Olympic Games to③respect to the gods. They would pray to their gods in the morning and then have the games in the afternoon. The first Olympic Games only④for one day! In modern times, the Olympic Games last for two weeks. In the modern Olympics, we have many different kinds of sports, but in the ancient Olympic Games, there were only⑤ten kinds of sports.One last fact—thousands of years ago,⑥women could not watch the games.⑦, they would be punished! Here is a story about a woman at the ancient Olympic Games in Greece. Her name was Helen. Helen’s son Rodus⑧the competition of running in the Olympic Games. Helen wanted to watch Rodus run, so she made herself⑨like a soldier and entered the stadium. Unfortunately, Helen was found inside the stadium. Rodus won the⑩, but his mother was punished.（）①A. in B. for C. with（）②A. started B. began C. happened（）③A. show B. showed C. showing（）④A. last B. lasts C. lasted（）⑤A. about B. less than C. more than（）⑥A. marry B. married C. marrying（）⑦A. Or B. However C. Otherwise（）⑧A. join B. join in C. took part in（）⑨A. like B. looks C. looked（）⑩A. competition B. match C. gameKey: BCACABCCAA8A Unit 4 More Practice BReligion was very important to the ancient Greeks. In①opinion, itwould make their lives better and also the gods and goddesses would take care of them after they②.The Greeks believed in many different gods and③. These gods and goddesses controlled everything in their④and the environment. It was important to make them happy—happy gods and goddesses helped you, but unhappy⑤punished you.Zeus is the⑥of the Greek gods. Zeus is lord of the sky, and the god of rain. Zeus is married to Hera. She is the goddess of marriage and childbirth. Poseidon is the brother⑦f Zeus. He is the god of the sea. Aphrodite is the goddess of love and⑧. Aphrodite rises from the waves of the sea. She makes everyone⑨love.There are also gods and goddesses of the home, of war, of music, of the city and of fire. The Greeks held many festivals to show respect to them. They⑩temples to be the gods and goddesses’homes. People prayed and gave gifts to the gods and goddesses to make their wishes come true—for a good harvest, or for a good journey, or for their children to become beautiful.（）①A. my B. his C. their（）②A. die B. died C. death（）③A. godess B. goddess C. goddesses（）④A. life B. live C. lives（）⑤A. one B. ones C. once（）⑥A. ruler B. king C. queen（）⑦A. on B. to C. of（）⑧A. beauty B. beautiful C. beautied（）⑨A. feel B. fall C. fell（）⑩A. build B. built C. buildedKey: CBCCBACAAB8A Unit 5 Reading BIn 1904, Mrs Bess clarke of Washington State, the USA, saw a long, dark tree trunk in a lake. As she moved①, she saw the trunk②in the water. It looked very③. Mrs Clarke described seeing a strange creature. It was black in colour, with a head in the shape of a triangle, round eyes, and a long tail. Based④her description, scientists regarded it as a kind of sea dinosaur, they called it Bess.Since then, many people saw Bess in the⑤lake. They described Bess as a dark, snake-like creature with a long tail. John Lee has studied strange creatures and monsters⑥. In 1990, he set up a video camera near the lake to try to film Bess. One morning john saw the creature swimming near the surface of the lake. The creature appeared suddenly ⑦of the water and had the same appearance as the one nearly 100 years ago. John Lee took a film that day. It showed a creature about 100 metreslong with a very small head.In 1992, Ron Smith reported⑧Bess and three other similar creatures in the same lake. The bodies of the three other creatures were⑨different. They seemed to be another kind of sea creature.According to Dr David Dino, the world-famous expert on strange creatures, it is possible that sea monsters are living in many great lakes ⑩the world.（）①A. near B. close C. closer（）②A. moving B. moved C. move（）③A. frightening B. frightened C. frighten（）④A. in B. on C. at（）⑤A. / B. same C. different（）⑥A. his life B. his live C. all his life（）⑦A. out B. went out C. inside（）⑧A. see B. saw C. seeing（）⑨A. very B. quite C. quiet（）⑩A. in B. all C. aroundKey: CAABBCACBC8A Unit 5 More Practice ASally felt frightened when she saw a huge, dead monster on the①inAustralia. It was hairy and very smelly. “It was horrible,” said Sally. “It was in the shape of a tree trunk, and it looked like a monster.” Nobody ②what the monster was.Do you believe that dragons exist? Nobody has③seen a dragon, but there are still many drawings of dragons④the world. They have wings and sharp claws, and they breathe fire. Dragons represent different things in different cultures.⑤, the Chinese dragon lives in the sky and⑥all the water on Earth. One type of dragon lives in the sky and controls all the water on Earth. One type of dragon really does exist and⑦is the Sea Dragon. It is found in the seas of Australia it is about 45 centimetres long. There is a strange thing about this creature—the males⑧the babies. Some males live for more than twenty years and give birth twice a year.Have you ever seen a jellyfish? There is one type of jellyfish called the Sea Wasp. It looks like a harmless sea creature. It has no head, no brain and is 99% water. However, its sting can kill. If you get stung by one of these⑨, you have four minutes to get help, or die!（）①A. beach B. road C. lake（）②A. know B. knows C. knew（）③A. been B. ever C. even（）④A. in B. all C. around（）⑤A. However B. Otherwise C. For example（）⑥A. controls B. controlled C. controlling（）⑦A. it B. that C. /（）⑧A. give B. gave C. have（）⑨A. creature B. dragon C. monsterKey: ABBCCABCA8A Unit 6 Reading AWang Damin sits on the side of the river. He is cooking①, with a large bird on his head. The bird is a cormorant, and Damin is a②. He is over 60 now but still works every day and is still③to control his raft on the river. He lives and works with his cormorants on this river. Cormorants are large black birds, about a metre long. They are good at ④fish because they can swim⑤⑥water. Their large feet are used to push them quickly through the water.Damin does not require nets to catch fish. That is done for him by his twelve cormorants. Damin begins his work on his bamboo⑦with his birds in the late afternoon. The birds swim down and catch fish. A piece of grass is tied around the neck of each bird, so it cannot swallow the fish. They⑧the fish back to the raft. The fish are then removed from the birds’ mouths and thrown into a big basket by Damin. At night, a light is hung from the front of the raft.⑨helps Damin see better, and alsoattracts the fish. Later, some of the fish are sold, and the rest are divided between Damin’s family and the cormorants.Cormorant fishing is a⑩Chinese skill. However, few young people are interested in doing his type of work any more. Modern fishing methods are now widely used.In 50 years, perhaps cormorant fishermen will no longer exist in the world.（）①A. meal B. a meal C. dinner（）②A. fish B. fisher C. fisherman（）③A. enough strong B. strong enough C. strongly（）④A. catch B. catches C. catching（）⑤A. well B. good C. nice（）⑥A. in B. under C. inside（）⑦A. raft B. boat C. ship（）⑧A. take B. took C. bring（）⑨A. It B. This C. That（）⑩A. tradition B. traditional C. customsKey: BCBCABACBB8A Unit 6 More Practice AOur company is①a new scientist to join our busy team.About us: We are international company and we are②different types of paint. We hope to create a paint that dries very quickly and has no③smell. If we successful, we will sell this paint around the world.About you: You must have experience④working in a laboratory. You must have the experience of working with⑤.Our laboratory often has a bad smell. It is also very noise. You must be able to work well in this difficult environment. You need to work calmly and not get excited or⑥when there is a lot of work to do. You must have a good sense of humour and⑦g telling jokes. You must have the ability to work alone and also as part of a team.We are looking for a very⑧t person. You need to be able to work quickly and correctly. There is a lot of paperwork. You must like writing reports and be⑨expert in computer technology.The job requires you to travel a lot and sometimes work in the evening and at weekends.If you think you are the right person for the job, contact us today!（）①A. looking for B. looking to C. looking forward（）②A. research for B. researching for C. researching（）③A. pleasant B. unpleasant C. uncomfortable（）④A. in B. on C. at（）⑤A. print B. paint C. printing（）⑥A. sad B. unset C. sadly（）⑦A. enjoy B. enjoys C. enjoying （）⑧A. efficient B. interested C. excited （）⑨A. a B. an C. theKey: ACBCBBCAB。

第1、2章习题一、填空题1.传感器的功用是向ECU提供汽车运行状况和发动机工况。

2.凸轮轴位置传感器作为喷油时刻控制和_点火时刻_控制的主控制信号。

3.爆燃传感器是作为爆燃控制的修正信号。

4.电子控制单元主要是根据进气歧管压力确定基本的喷油量。

5.电控系统由传感器、ECU、执行器三大部分组成。

6.电控系统有汽车电子控制装置、车载汽车电子装置两种基本类型。

7.传感器是采集并向ECU输送信息的装置。

8.电子控制单元ECU是发动机控制系统核心。

9.汽车电控系统的执行元件主要有电磁式喷油器；点火控制器(点火模块)；怠速控制阀、怠速电机；EGR阀元件。

10.发动机工作时，ECU根据节气门开度信号判断发动机负荷大小。

11.负温度系数的热敏电阻其阻值随温度的升高而降低。

二、简答题1、汽车电子技术发展的背景是什么？●环保、安全、节能及舒适推动了汽车技术的发展●电子信息技术推进了汽车技术向集成与智能迈进●汽车电子技术应用的优越性2、说明为什么很多汽车都采用CAN总线技术？一方面是由于电子产品本身的特点，如计算机芯片的功能不断提高而价格则在不断下降。

另一方面，也是由于一些新增的性能可在相当程度上借助于原有构件实现，如ESP(电子稳定系统)就利用了很多ABS原有元件。

再者，原有系统皆系单独控制，很复杂，现开始发展并推广的多路传输技术、CAN总线网络控制技术等，可将多个系统的传感器、控制器及执行机构集成到一起，各系统分享信息，这就大大简化了线路，节省材料、加工装配费用3、请分析汽车如果采用42V电源系统供电，有什么好处？电压提高3倍，电流就可减小2/3，因而可以大大减小电缆、电动机、线圈等尺寸及质量。

可使一些新技术，如电子控制电动气阀机构、飞轮内装起动机/发电机一体式结构以及电子控制电动制动器、转向系的应用成为可能；同时，可以减轻汽车质量并提高效率4、汽车电控系统的组成及各部分的作用是什么？➢信号输入装置——各种传感器，采集控制系统的信号，并转换成电信号输送给ECU；➢电子控制单元——ECU，给各传感器提供参考电压，接受传感器信号，进行存储、计算和分析处理后执行器发出指令；➢执行元件——由ECU控制，执行某项控制功能的装置。

2024考研英语一完形填空试题及答案（第1题-20题）业务课名称：英语考生须知：1.答案必须写在答题纸上，写在其他纸上无效。

2.答题时必须使用蓝、黑色墨水笔或圆珠笔做答，用其他答题不给分，不得使用涂改液。

完形填空There's nothing more welcoming than opening a door for you.（1）Without the need to be touched to open or close, automatic doors are essential in（2）improving disabled access to buildings and helping provide general（3）convenience to commercial buildings.Self-sliding doors began to emerge as a commercial product in 1960 after being invented six years（4）successively by two Americans, Dee Horton and Lew Hewitt. They（5）started out as a novelty feature, but as their use has grown, their（6）benefits have extended within our technologically advanced world. Particularly（7）useful in busy locations and during times of emergency, the doors（8）act as crowd management by reducing the obstacles put in people's way.（9）As well as making access both in and out of buildings easier for people, the difference in the way many of these doors open helps to reduce the total area（10）. occupied by them. Automatic doors often open to the side, with the panels sliding across one another. Replacing swing doors, these（11）allow smaller spaces to maximise the usable space inside without having to（12）clear the way for a large, sticking-out door. There are many different types of automatic door, with each（13）relying on specific signals to tell them when to open.（14）Although these methods differ, the main（15）principles remain the same.Each automatic door system（16）analyses the light, sound, weight, or movement in their vicinity as a signal. Sensor-types are chosen to（17）compare the different environments they are needed in.（18）For example, a busy road might not（19）suit a motion-sensored door, as it would constantly be opening for passers-by. A pressure-sensitive mat would be more（20）appropriate to limit the surveyed area.答案:1-10题：DCBAB CADAD 11-20题：ACCDC BDCBA。