最新模块一、二综合练习题答案
模块一二综合练习题
模块一、二综合练习题答案一.判断题1、计算车外圆的切削速度时,应按照已加工表面的直径数值进行计算。
(×)2、刀具前角的大小,可以是正值,也可以是负值。
(√)3、刀具的主偏角具有影响切削力、刀尖强度、刀具散热的作用。
(√)4、金属的切削过程也是形成切屑和已加工表面的过程。
(√)5、精加工相对于粗加工而言,刀具应选择较大的前角和较小的后角。
(×)6、刃倾角的作用是控制切屑的流动方向并影响刀头的强度,所以粗加工应选负值。
(√)7、切削加工中,常见机床的主运动一般只有一个。
(√)8、工艺系统刚性较差时(如车削细长轴),刀具应选用较大的主偏角。
(√)9、粗车主要目的是切除工件上的大部分余量,精车的主要目的是保证工件的精度和减小表面粗糙度Ra值。
(√)10、车削加工不宜加工硬度在30HRC以上的淬火钢。
(√)11、90度车刀(偏刀),主要用来车削工件的外圆、端面和台阶。
(√)12、一夹一顶装夹,适用于工序较多、精度较高的工件。
(×)13、两顶尖装夹方式适用于装夹重型轴类零件。
(×)14、两顶尖装夹粗车工件,由于支承点时顶尖,接触面积小,不能承受较大切削力,不宜使用。
(√)15、车削内孔时排屑和冷却较困难。
(√)16、圆柱孔的测量比外圆测量困难。
(√)17、车削套类零件的刀柄受孔径及孔深的影响,刚性较差。
(√)18、麻花钻可以在实心材料上加工内孔,不能用来扩孔。
(×)19、车孔时的切削用量应比车外圆低一些。
(√)20、细长轴通常用一夹一顶或两顶尖装夹的方法来加工。
(√)21、为了防止和减少薄壁零件工件加工时产生变形,加工时应分粗、精车。
(√)22、车削薄壁零件时,尽量不用径向夹紧法,最好用轴向夹紧法。
(√)23、车削短小套类零件时,为保证内、外圆轴线的同轴度,可用一次装夹车削。
(√)24、在立式铣床上不能加工键槽。
(×)25、卧式铣床主轴的中心轴线与工作台面垂直。
高中英语外研版必修二 Modules1~2 单元综合测试(含答案)
综合仿真测试Modules 1~2第Ⅰ卷第一部分英语知识运用(共两节,满分45分)第一节单项填空(共15小题;每小题1分,满分15分)从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
1.Jane has lost weight by going on __________ diet and taking __________ exercise every day. A.a;an B.a;/ C./;/ D./;an答案 B [go on a diet意为“节食”;take exercise意为“锻炼”。
句意:简通过节食和锻炼减轻了体重。
] 2.In a secondhand bookshop,Billy came across a book which he thought was certainly a __________edition.A.rare B.special C.seldom D.hardly答案 A [本题考查词义辨析。
rare是形容词,意为“珍贵的”;special是形容词,意为“特别的”;seldom 是副词,意为“很少”;hardly是副词,意为“几乎不”。
根据句意可知答案为A。
]3.If you want to win in the contest,you must take great __________ about it.A.influence B.effect C.pain D.pains答案 D [take pains是固定搭配,意为“全力以赴”。
]4.Let's __________ the forest to __________ the scent of pines.A.head for;breath B.walk for;breatheC.head for;breathe D.walk through;breath答案 C [此题考查名词用做动词以及breathe的用法。
〖2021年整理〗Modules 1-2综合能力测试配套精选卷
Modules 1-2综合能力测试总分:12021听力部分(2021基础知识运用(25分)I. 从A、B、C、D四个选项中选择最佳答案。
(每小题1 分,共15分)( )21.—Have you had breakfast, Bob? (M1语法)—No. I didn’t ___ like eating anything this morning.A. lookB. soundC. feelD. taste( )22.—__ you___ your drawing?— Not yet! It will be done in a few minutes. (M2语法)A. Did, finishB. Will, finishC. Do, finishD. Have, finished ( )23. Catherine is afraid of flying. She feels ___ before he gets on a plane. (P4)A. surprisedB. excitedC. proudD. nervous( )24. —Is going fishing your ____?—Yes. I go fishing two days a week.A. cityB. jobC. nameD. hobby( )25.—Why don’t you buy that kind of MP4 player?—I can’t ___ it. I will ask my mother some money tomorrow.A. expectB. affordC. chooseD. offer( )26. —Mum, I have got the first ___ in the speech competition.—Congratulations!A. classB. gradeC. placeD. prize( )27. —My sister has lost their chance to work in Guangzhou.—____!A. Well doneB. Good luckC. What a pityD. Congratulations( )28. This opera is more ___ than and it’s about one hundred years longer than Beijing Opera. (P12)A. modernB. ancientC. naturalD. cultural( )29.— How much is the dictionary? (P10)— 129 yuan.— Oh, it is too expensive and I really can’t ______ it.A. affordB. achieveC. avoidD. offer( )30. Just before 12 o’clock on the Spring Festival EVE, everyone _____ ____from 5 to 0. (P12)A. count downB. write downC. count outD. turn down( )31.—Why does Mrs Green look worried?(P4)—Because her son got a bad ___ at school again.A. hobbyB. markC. restD. habit( )32. The Internet is very useful. We can get a lot of ___ from it. (混淆项在P4)A. thingB. messageC. informationD. advice( )33. I think Jill can do it well. Why don’t you let him have ___ try? (P2)A. aB. anC. theD. /( )34. –What’s wrong with my daughter’s ___, doctor? (P3)—She can’t hear anything clearly.A. feetB. handsC. eyesD. ears( )35. I have sent my e-mail to you last night. Have you receive it ___?A. stillB. nearlyC. yetD. alwaysII. 完形填空(共10分,每小题1分,计10分)One morning, an emperor was walking in his country when he met a beggar. The beggar came up and36 , “Can you meet my need, your Majesty?”“Of course. What is it? Just 37 me,” asked the emperor.“Will you please fill this begging bowl with 38 ?” asked the beggar.“Of course,” the emperor said and 39 one of his servants to fill the beggar’s bowl, 40 the money was gone. He poured again, and there was still 41 in the bowl. People gathered around them. The emperor shouted angrily, “ 42 ? I can’t be defeated by a beggar.” He decided to pour money by 43 . He poured much money into the 44 , but the bowl still remained empty. Finally, the emperor despaired. He asked the beggar, “What is the bowl 45 of?”The beggar laughed and said, “There is no secret. It is simply made of the desire of human beings.”( )36. A. argued B. played C. asked D. predicted( )37. A. show B. leave C. tell D. make( )38. A. shell B. water C. rice D. money( )39. A. told B. returned C. explained D. picked( )40. A. if B. but C. so D. or( )41. A. anything B. everything C. something D. nothing( )42. A. Why B. How C. When D. Who( )43. A. herself B. yourself C. himself D. myself( )44. A. bag B. house C. pocket D. bowl( )45. A. set B. made C. taken D. written阅读理解(2021III. 按要求完成文后各题。
牛津高中英语模块一UNIT2教材答案
牛津高中英语模块一UNIT2教材答案篇一:牛津高中英语模块一Unit2 练习和检测试题与答案牛津高中英语模块一Unit2 练习和检测试题与答案一、单项选择1. ______ two exams to worry about, I have to work really hard this weekend.A. WithB. BesidesC. As forD. Because of2. ______John has arrived, we can begin.A. IfB. As soon asC. Now thatD. Now this3. The students shared their experiences through their website, in the hopemore teenagers would help pass down their local culture.A. whichB. thatC. whereD. as4.He’s got himself into a dangerous situation________ he is likely to lose control over the plane.A. whereB. whichC. whileD why5.Nobody noticed the thief slip into the house because the lights happened to _______.A. be put up.B. give inC. be turned onD. go out6 .We asked teacher to explain _________.A. us the word.B. us of the word.C. the word to us.D. the word for us.7.The children were left __________ of a neighbor when they went on holiday.A. in chargeB. in the chargeC. under chargeD. at charge.8.. ----He has turned on all the lights in thebuildin g. That’s waste of electricity.---- It’s not his____. He just did what he was told to.A. mistake.B. wrongC. faultD.shorting.9. The teacher came in, ________ by some students.A. followedB. followingC. was followedD. to follow10. Don’t punish him again. ________, he is only a small child.A. After allB. In allC. First of allD. Above all11.★I have two bikes; _______ are broken.A. all of themB. both of themC. all of whichD. both of which12. We need water and air, _________ we can’t live.A. with whichB. with whomC. without which D without whom13. The reason ____ he explained was ______ he was ill and unable to go to school.A. why; thatB. why; becauseC. which; becauseD. which; that14.★ Premier Wen Jiabao said the suggestions on improving the quality of milk industry are supposed to careful consideration.A. determineB. decideC. deserveD. desire15.★ difficulties we may e across, we’ll help oneanother to overe them.A. WhereverB. WheneverC. HoweverD.Whatever二、完型填空★Are you a man or a mouse? When people ask this question they want to know 16 you think you are a 17 person or a coward(懦夫). But you will never really know the answer to this question 18 you are tested in real life. Some people19 they are brave but when they e face to face with real 20 , they act like cowards. Others think of themselves as cowards, but when they meet danger, they act like 21.Lenny had always thought of himself as a 22 person. He got worried before examinations. He worried about his job and his health. All he wanted in life was to be safe and healthy. 23 , on January 15th, 2002, a plane crashed into the Potomac River in Washington. Lenny went to the river to see what was happening. He saw a woman in the 24 water. Lenny did not feel afraid. He kept very 25 and did a very courageous thing. He jumped into Potomac, 26 to the woman, and kept her head 27 the water. Seventy-eight people died that day. Thanks to Lenny, it was not 28 . When you are in a very 29 situation and feel afraid, the bodyautomatically(自动地)produces a chemical in the blood. This chemical is called adrenalin(肾上激素). 30 adrenalin in the blood system, you actually feel stronger and stronger and are 31 to fight or run away. However, when you are absolutely terrified, the body can produce too much adrenalin. When this 32 the muscles bee very hard and you find you 33 move at all. You are paralyzed(使无能为力) with fear. This is 34 when we are very frightened, we sometimes say we are ‘petrified’, this word es from a Greek word‘petros’, which means ‘stone’. We are 35 frightened that we bee stonelike.16. A. howB. neitherC. whether D. either17. A. braveB. realC. hard D. certain18. A. whenB. untilC. after D. once19. A. realize B. findC. think D. agree20. A. lifeB. question C. mouse D. danger21. A. soldiers B. miceC. heroes(英雄)D. cowards22. A. useful B. braveC. nervous D. terrible23. A. SoB. ThereforeC. ThenD. Actually24. A. freshB. poisonous C. warm D. ice-cold25. A. nervous B. calmC. frightened D. excited26. A. wentB. helpedC. spoke D. swam27. A. inB. underC. above D. from28. A. an accident B. a mistake C. seventy-eightD. seventy-nine29. A. dangerous B. fortable C. different D.favorable30. A. WithB. Without C. For D. Like31. A. afraidB. unableC. ready D. anxious32. A. getsB. disappears C. happens D. goes33. A. needn’t B. can’tC. mustn’t D. shouldn’t34. A. where B. howC. because D. why35. A. reallyB. veryC. such D. so三、阅读理解(A)Six people were traveling in a partment (包厢) on a train. Five of them were quiet and well behaved(举止文明), but the sixth was a rude young man who was causing a lot of trouble to the other passengers.At last this young man got out of the station with his two heavy bags. None of the other passengers helped him, but one of them waited until the rude young man was very far away, and then opened the window to him, “ You left something behind in the partment!” Then he closed the window again.The young man turned around and hurried back with his two bags. He was very tired when he arrived, but he shouted through the window, “ What did I leave behind?”As the train began to move again, the passenger who had called him back opened the window and said, “ A very bad impression!”36. Of the six passengers in the partment ___.A. five of them were rude and badly behavedB. one of them was rude and badly behavedC. five were always causing trouble on the trainD. only one was quiet and well behaved37. When the rude young man got off the train ___.A. he left his two bags behindB. he was thrown out through the windowC. the other five pas sengers didn’t help himD. one of the other passengers opened the window for him38. The young man hurried back because ___.A. he found he had left something on the trainB. he found he had left his bags on the trainC. he heard a passenger calling him by his nameD. he heard a passenger shouting to him that he hadleft something behind39. The passenger who had called him back wantedA. to punish him for his bad behaviorB. to have a word with him about his behaviorC. to help him with his behaviorD. to return him the things he had left on the train(B)A thief entered the bedroom of the 30th President of the United States, who met him and helped himescape punishment.The event happened in the early morning hours in oneof the first days when Calvin Coolidge came into power, late in August, 1923. He and his family were living in the same third-floor suite(套房) at the Willard Hotelin Washington that had occupied several years before. The former President’s wife was still living in the White House.Coolidge awoke to see a stranger go through his clothes, remove a wallet and a watch chain.Coolidge spoke, “ I wish you wouldn’t take that.”The thief, gaining his voice, said, “ Why?”“ I don’t mean the watch and chain, only thecharm(表坠). Take it near the window and read what is impressed on its back,” the president said.The thief read, “ Presented to Calvin Coolidge.”“ Are you President Coolidge?” he asked.The president answered, “ Yes, and the House of Representatives(众议院)gave me the watch charm. I’m fond of it. It would do you no good. You want money. Let’s talk this over.”Holding up the wallet, the young man said in a low voice, “ I’ll take this and leave everything else.”Coolidge, knowing there was 80 dollars in it, persuaded the young man to sit down and talk. He told the President he and his college roommate had overspent during their holiday and did not have enough money to pay their hotel bill.Coolidge added up the roommate and two rail tickets back to the college. Then he counted out 32 dollars and said it was a loan(借款).He then told the young man, “ There is a guard in the corridor.” The young man nodded and left through the same window as he had entered.40. What caused the thief to meet the PresidentA. He knew the president had lots of money.B. He knew the president lived in the suite.C. He wanted to be a rich businessman.D. He wanted to steal some money.41. Why did Calvin Coolidge live at the Willard Hotel in those days?A. Because the former president was still in the White House.B. Becaus e the former First Lady hadn’t left the White House.C. Because the First lady liked to live there.D. Because he liked there.42. Coolidge counted out 32 dollars______.A. in order not to be killed by the thiefB. in order to be out of dangerC. so as to help the young student overe his difficulty.D. because he had no more money.43. The young man’s roommate went back to college_____.A. by airB. by waterC. by busD. by train44. Which of the following might happen afterwards?A. The young man repaid the 32 dollars.B. The thief was put into prison.C. The President told many reporters the thief’s name.D. The President ordered the young man to repay the money.四、单词拼写45.How much did the bookstore owner c_______ you?46. Teaching the children with disabilities is ac______________ job.47.The only_________________(解释) for his behavior is that he’s mad.48. No one can go u________________ if he breaks the law.49.I _____________(真诚地)hope that you will be successful next time.50. This tool is ______________(贵重的)for doing electrical repairs.51.Students are f___________ to smoke in school.52. He ____________(后悔)that he had been careless.53. Where are you planning to spend your v__________ next summer..54.They are having a heated a_________(争论) over whether smoking is badfor the health.篇二:牛津高中英语模块1Unit_2_基础知识训练模块1Unit 2 基础知识训练(一)单项填空:1. ---- Where is Frank?---- He is ______ his car painted in the garage.A. takingB. doingC. havingD. giving2. ---- If you like I can do some shopping for you.---- That’s a very kind ________.A. offerB. serviceC. pointD. suggestion3. ---- I feel like ________ for a walk. Will you go with me?---- If Mary goes, _________.A. to go; I alsoB. to go; so do IC. going; so will ID. going; so do I4. ---- Who to ld you about Dad’s illness?---- The doctor in _________.A. connectionB. turnC. publicD. charge5. We insisted that the sick children ________ to hospital at once.A. must be sentB. be sentC. will be sentD. is sent6. Does this meal cost $50? I __________ something far better than this!A. preferB. expectC. suggestD. suppose7. Mary wanted to travel around the world all by herself, but her parents did not ________ her todo so.A. forbidB. allowC. followD. ask8. _________ you’ve got a chance, you might as well make full use of it.A. Now thatB. AfterC. AlthoughD. As soon as9. You are not _______ to take the newspapers and magazines out of the reading room.A. hopedB. imaginedC. supposedD. wished10. Mr. Lee suggested _______ to there instead of________ by bus.A. cycling; goingB. cycling; goC. to cycle; goingD. cycle; go(二)单词拼写:1. Can you take out the ___________ when you go off to work? (垃圾)2. Such ____________ is unacceptable in public. (行为)3. Various ______________ for these changes in climate have been offered by scientists all overthe world. (解释)4. In the final ______________, Harry expressed his love to Julia. (场景)5. Teachers in this school are given plete _______ in their choice of teaching materials. (自由)6. I think we all learned a _____________ lesson today. (宝贵的)7. After a brief __________ of silence, the students started their discussion. (时期、时段)8. She drew back the _________ to let in the light,and then sat down to enjoy a cup of tea. (窗帘)9. Students at our school generally have the highest test __________ in the city. (分数)10. In this country, women are ______________ to enter the temple. (禁止)(三)词组填空:1. Generally speaking, a lot of successful people_________________ themselves.2. Who do you think will be ______________ the pany when Mr. Luck retires this June?3. With Tom away and Jenny ill, we're going to have to work ________________ to get this taskfinished on time.4. I understand him much better ______________ I’ve seen his living conditions.5. Mike is impossible! He treated me _______________ I was a plete stranger!6. I’m sorry, but you ________________ hand in your paper last Monday.1. I had a very bad day at the office, so tonight I don’t __________________ doing anything.2. We went to bed, but Julie and Kate____________________ talking and playing cards.3. She ______________ following me all the way here, though I told her not to.4. Be careful not to ______________ those papers on the desk.5. What shall we _____________ the dog if we go off on vacation?6. Suddenly all the lights ______________ and it was pitch dark.(四)综合填空:1. ---- What’s up, honey? You don’t look happy.---- Sorry, nothing serious. I just had an a______________ with my boss this afternoon.2. ---- Why didn’t you hand in your home work, Jeffery?---- I’m sorry, sir. But it’s not myf___________. My dog ate it. 3. ---- Copy the text ten times! Every one of you! ---- But sir, it's unfair to p___________ a whole class for the actions of one or two students.4. ---- I give up! Physics is simply driving mec__________!---- Why don’t you ask your teacher for help?5. ---- What’s wrong with Bob these days?---- I think he is still u__________ that we forgot his birthday.6. ---- How are you paying? By credit card?---- No, in c__________.7. ---- Are you close to your parents?---- Yes. I have a good r____________ with them.8. ---- We still have a s_________ ticket fortonight’s game.---- Then can I go with you?9. ---- May I speak to Dr. Henderson please?---- I’m sorry, but Dr. Henderso n is away onv__________.10. ---- What a m___________! Can’t you clean up a bit?---- Sorry. I’m too busy with my exam this week.(五)短文填空:the brothers had to take Spot to the vet. They spent a whole day with the dog so they did not have time to clean the house.模块1 Unit 2KEYS(一)单项填空:1-5: CACDB 6-10: BBACA(二)单词拼写:1. garbage2. behaviour6. valuable7. period(三)词组填空:A1. are hard on2. in charge of6. were supposed toB1. feel like2. stayed up6. went out(四)综合填空:1. argument2. fault6. cash7. relationship(五)短文填空:1. vacation2. charge6. upset7. trust 3. explanations8. curtains 3. like crazy 3. insisted on 3. punish8. spare3. surprise 8. explain4. scene9. scores4. now that 4. mix up4. crazy9. vacation 4. mess9. rude5. freedom 10. forbidden 5. as though 5. do with 5. upset 10. mess 5. mad/angry 10. hard篇三:牛津高中英语模块一Unit_2_Home_aloneHome aloneAct oneMom and Dad arrive back from vacation a day is dark when Mom and Dad Dad: It’s so nice to be home!Mom: Yes, I Suddenly a door opens and a soccer ball walking very slowly.Eric: Mom! Dad! You’re back early! (looking around room, sounding e home until tomorrow!The dog slowly walks to Mom and Dad.Mom: (Bending to touch dog) Eric, he’s so tired and hungry! (looking at table) The money for dog food , but Spot looks like he is ! What did you Dad: And look at this room— garbage all over the place! Where is your brother? (shouting angrily) Daniel! Daniel: (running into room) Mom, Dad, I canDad opens the curtains and light es into the room. The room is, with pizza boxes on the floor and dirty dishes in the sink. In the corner, there is a garbage canpaper.Mom and Dad both turn towards Daniel.Dad: (sounding very angry) listen to me, young man----we an I don’t know the reason Mom: Daniel, we thought you were an adult, a person ...Dad: How can we trust you any more? We won’t such behavior in our family!Daniel: ( shouting) Stop me. I’m still a! Why is everything always my Daniel runs into his bedroom and the door angrily. Mom and Dad look at.Act two, scene oneDaniel and Eric’s bedroom. Eric sits and looksDaniel: They never even myself. I hate them!Eric: You don’t hate them. I can tell them we had . Then they won’t be madDaniel: No, don’t tell them anything. Anyhow they didn’t me. They don’t. Let them th ink what they want.Eric: But Daniel, if they knew that Spot was sick and we used the money to him to the Daniel: And that we spent all of yesterdayhouse --- but no, Eric, why didn’t they ask me what happenedAct two, scene twoMom: Do you think we were Daniel? Perhaps there is a why the house is a mess…Dad: Maybe, but he has been sohim or he won’t Mom: Oh, why does this have to be so?End of act two.Project ---Growing pains。
练习题、基础知识模块1
基础知识、模块一一、单选:1、职业是指从业人员为获取主要()来源所从事的社会工作类别。
A生产B生活C经济D经营答案及解析:B。
基础知识课本P003,职业的含义。
2、《中华人民共和国职业分类大典》将我国职业划分为()大类。
A六B七C八D九答案及解析:C。
基础知识课本P004,职业类型划分。
3、职业资格是对从事某一职业所必备的知识、()和能力的基本要求。
A品德B技术 C 素质D技能答案及解析:D。
基础知识课本P005,职业资格定义。
4、职业道德基本规范包括“爱岗敬业、诚实守信、办事公道、()、奉献社会”A 依法办事B公平公正C服务群众D热爱祖国答案及解析:C。
基础知识课本P008,职业道德基本规范。
5、消防行业职业道德是消防行业从业人员在从事消防职业活动中,从思想到工作行为所必须遵守的()和消防行业职业守则。
A法律法规B单位规章C道德标准D职业道德规范答案及解析:D。
基础知识课本P009,消防行业职业道德的含义。
6、专研业务是指在消防从业中刻苦专研,深入探究并掌握()发生、发展的规律,以及防火、灭火的知识和技能。
A事故B事情C火灾D任务答案及解析:C。
基础知识课本P014,钻研业务的含义。
二、多选:1、职业的特征包括()A目的性B社会性C稳定性D规范性E群体性答案及解析:ABCDE。
基础知识课本P003,职业的特征。
2、消防设施操作员职业,从事建(构)筑物消防设施()等工作的人员。
A运行B操作C维修D保养E检测答案及解析:ABCDE。
基础知识课本P005,消防设施操作员职业定义。
3、消防设施操作员职业,主要工作任务有()A值守消防控制室B操作、维修、保养火灾自动报警、自动灭火系统等消防设施C安装、调试火灾自动报警、自动灭火系统等消防设施D检测火灾自动报警、自动灭火系统等消防设施。
答案及解析:ABD。
基础知识课本P005,消防设施操作员职业,主要工作任务有三项:一是值守消防控制室;二是操作、维修、保养火灾自动报警、自动灭火系统等消防设施;三是检测火灾自动报警、自动灭火系统等消防设施。
高中英语模块综合测评1Modules1~2外研选修6
模块综合测评(一) Modules 1~2Ⅰ.阅读理解(共15小题;每小题2分,满分30分)AWhen you go to St.Petersburg,the number of attractions can seem overwhelming.If you' re short on time,or just want to make sure to hit the highlights,these are the top m ustsee sights in St.Petersburg.The Hermitage MuseumThe Hermitage Museum is one of the most important sights to see for any visitor to St.Petersburg.There you can see lots of different paintings of old masters inside the Hermitage.Prepare to come facetoface with classic Western artists.The Russian MuseumThe Russian Museum holds one of the largest collections of Russian art in the world.View Russian art creations through the ages, from Byzantinestyle icons to the Socialist Realism of Stalin's times.Kizhi IslandKizhi Island is an openair museum of wooden buildings from the Karelia Region of Russia.These impressive structures are made without any nails (钉子)—the wood fits together with joints and grooves(沟槽).PeterhofPeterhof is as beautiful as it is fun.You'll be charged for admission(门票),but go to Peterhof when the fountains(喷泉) are working during the day in the summer.They are shut off in winter as well as in the evenings.The Church of Our Savior on Spilled BloodLove it or hate it, the Church of Our Savior on Spilled Blood is an attractive mustsee sight.The beautiful look may make your eyes brighten, and the paintings inside the church will make you say “Wow!”The Bronze Horseman StatueThe Bronze Horseman statue is a part of Russian Culture and a symbol of St.Petersburg.Made famous by Alexander Pushkin(普希金), this statue of Peter the Great sitting on his horse can truly show Peter the Great's influence on the Russian idea of greatness.1.If you're interested in paintings,you'd better go to .A.the Hermitage Museum and PeterhofB.the Hermitage Museum and the Church of Our Savior on Spilled BloodC.Kizhi Island and the Church of Our Savior on Spilled BloodD.the Russian Museum and Kizhi Island【解析】细节理解题。
2021-2022学年新教材高中数学 模块综合训练课后练习(含解析)新人教B版选择性必修第一册
模块综合训练一、单项选择题:本题共8小题,每小题5分,共40分.在每小题给出的四个选项中,只有一项是符合题目要求的.1.“ab=4”是“直线2x+ay-1=0与直线bx+2y-2=0平行”的( )A.充分不必要条件B.必要不充分条件C.充要条件D.既不充分也不必要条件两直线平行,∴斜率相等.即可得ab=4,又因为不能重合,当a=1,b=4时,满足ab=4,但是重合,故“ab=4”是“直线2x+ay-1=0与直线bx+2y-2=0平行”的必要不充分条件.2.如图,四面体S-ABC 中,D 为BC 中点,点E 在AD 上,AD=3AE ,则SE ⃗⃗⃗⃗⃗ =( ) A.13SA⃗⃗⃗⃗⃗ +12SB ⃗⃗⃗⃗⃗ +13SC ⃗⃗⃗⃗ B.23SA ⃗⃗⃗⃗⃗ +16SB ⃗⃗⃗⃗⃗ +16SC ⃗⃗⃗⃗ C.12SA ⃗⃗⃗⃗⃗ +14SB ⃗⃗⃗⃗⃗ +14SC ⃗⃗⃗⃗ D.12SA ⃗⃗⃗⃗⃗ +13SB ⃗⃗⃗⃗⃗ +16SC ⃗⃗⃗⃗S-ABC 中,D 为BC 中点,点E 在AD 上,AD=3AE ,∴SE ⃗⃗⃗⃗⃗ =SA ⃗⃗⃗⃗⃗ +13AD ⃗⃗⃗⃗⃗ =SA⃗⃗⃗⃗⃗ +13×12(AC ⃗⃗⃗⃗⃗ +AB ⃗⃗⃗⃗⃗ )=SA ⃗⃗⃗⃗⃗ +16AC ⃗⃗⃗⃗⃗ +16AB ⃗⃗⃗⃗⃗ =SA ⃗⃗⃗⃗⃗ +16(SC ⃗⃗⃗⃗ −SA ⃗⃗⃗⃗⃗ )+16(SB ⃗⃗⃗⃗⃗ −SA ⃗⃗⃗⃗⃗ )=23SA ⃗⃗⃗⃗⃗ +16SB ⃗⃗⃗⃗⃗ +16SC ⃗⃗⃗⃗ .3.圆P :(x+3)2+(y-4)2=1关于直线x+y-2=0对称的圆Q 的标准方程是( ) A.(x+2)2+(y-1)2=1 B.(x+2)2+(y-5)2=1 C.(x-2)2+(y+5)2=1 D.(x-4)2+(y+3)2=1P :(x+3)2+(y-4)2=1,圆心(-3,4),半径1,关于直线x+y-2=0对称的圆半径不变,设对称圆的圆心为(a ,b ),则{a -32+b+42-2=0,b -4a+3=1,解得{a =-2,b =5,所求圆Q 的标准方程为(x+2)2+(y-5)2=1.4.(2021新高考Ⅰ,5)已知F 1,F 2是椭圆C :x 29+y 24=1的两个焦点,点M 在C 上,则|MF 1|·|MF 2|的最大值为( )A.13B.12C.9D.6|MF 1|+|MF 2|=2a=6,则√|MF 1|·|MF 2|≤|MF 1|+|MF 2|2=3, 则|MF 1|·|MF 2|≤9,当且仅当|MF 1|=|MF 2|=3时,等号成立. 故|MF 1|·|MF 2|的最大值为9.故选C .5.坐标原点O(0,0)在动直线mx+ny-2m-2n=0上的投影为点P,若点Q(-1,-1),那么|PQ|的取值范围为()A.[√2,3√2]B.[√2,2√2]C.[2√2,3√2]D.[1,3√2]mx+ny-2m-2n=0,可化为m(x-2)+n(y-2)=0,故直线过定点M(2,2),坐标原点O(0,0)在动直线mx+ny-2m-2n=0上的投影为点P,故∠OPM=90°,所以P 在以OM为直径的圆上,圆的圆心N为(1,1),半径为√2,根据点与圆的关系,|NQ|=√(1+1)2+(1+1)2=2√2,故√2=2√2−√2≤|PQ|≤√2+2√2=3√2.6.正确使用远光灯对于夜间行车很重要.已知某家用汽车远光灯(如图)的纵断面是抛物线的一部分,光源在抛物线的焦点处,若灯口直径是20 cm,灯深10 cm,则光源到反光镜顶点的距离是()A.2.5 cmB.3.5 cmC.4.5 cmD.5.5 cmxOy ,如图所示,设对应抛物线的标准方程为y 2=2px ,由题意知抛物线过点(10,10),得100=2p×10,得p=5,则p 2=2.5,即焦点坐标为(2.5,0), 则光源到反光镜顶点的距离是2.5cm .7.如图,四棱锥S-ABCD 中,底面是正方形,各棱长都相等,记直线SA 与直线AD 所成角为α,直线SA 与平面ABCD 所成角为β,二面角S-AB-C 的平面角为γ,则( ) A.α>β>γ B.γ>α>β C.α>γ>β D.γ>β>αAC ,BD ,交于点O ,连接OS ,则OA ,OB ,OS 两两垂直,以O 为原点,OA 为x 轴,OB 为y 轴,OS 为z 轴,建立空间直角坐标系,设|AB|=2,则S (0,0,√2),A (√2,0,0),D (0,-√2,0),B (0,√2,0),SA ⃗⃗⃗⃗⃗ =(√2,0,-√2),AD ⃗⃗⃗⃗⃗ =(-√2,-√2,0),SB ⃗⃗⃗⃗⃗ =(0,√2,-√2),cos α=|SA ⃗⃗⃗⃗⃗ ·AD⃗⃗⃗⃗⃗⃗ ||SA ⃗⃗⃗⃗⃗ |·|AD⃗⃗⃗⃗⃗⃗ |=√4×√4=12,平面ABCD 的法向量n =(0,0,1),cos β=|n ·SA ⃗⃗⃗⃗⃗||n |·|SA ⃗⃗⃗⃗⃗ |=√2√4=√22,设平面SAB 的法向量m =(x ,y ,z ),则{m ·SA ⃗⃗⃗⃗⃗=√2x -√2z =0,m ·SB ⃗⃗⃗⃗⃗=√2y -√2z =0,取x=1,得m =(1,1,1),cos γ=|m ·n ||m |·|n |=√3=√33, ∵cos α<cos γ<cos β,∴α>γ>β.8.设F 1,F 2是双曲线C :x 2a 2−y 2b 2=1(a>0,b>0)的左、右焦点,O 是坐标原点,过F 2作C 的一条渐近线的垂线,垂足为P.若|PF 1|=√6|OP|,则C 的离心率为( ) A.√5 B.√3 C.2 D.√2|PF 2|=b ,|OF 2|=c ,∴|PO|=a.在Rt △POF 2中,cos ∠PF 2O=|PF 2||OF 2|=bc ,∵在△PF 1F 2中,cos ∠PF 2F 1=|PF 2|2+|F 1F 2|2-|PF 1|22|PF 2||F 1F 2|=bc ,∴b 2+4c 2-(√6a )22b ·2c=bc ⇒c2=3a 2,∴e=√3.二、多项选择题:本题共4小题,每小题5分,共20分.在每小题给出的四个选项中,有多项符合题目要求.全部选对的得5分,有选错的得0分,部分选对得3分.9.(2021新高考Ⅰ,11)已知点P 在圆(x-5)2+(y-5)2=16上,点A (4,0),B (0,2),则( ) A.点P 到直线AB 的距离小于10 B.点P 到直线AB 的距离大于2 C.当∠PBA 最小时,|PB|=3√2 D.当∠PBA 最大时,|PB|=3√2,记圆心为M ,半径为r ,则M (5,5),r=4.由条件得,直线AB 的方程为x 4+y2=1,整理得x+2y-4=0,过点M 作MN 垂直于直线AB ,垂足为N ,直线MN 与圆M 分别交于点P 1,P 2,圆心M (5,5)到直线AB 的距离|MN|=√12+22=√5,于是点P 到直线AB 的距离最小值为|P 2N|=|MN|-r=√5-4,最大值为|P 1N|=|MN|+r=√5+4. 又√5-4<2,√5+4<10,故A 正确,B 错误; 过点B 分别作圆的两条切线BP 3,BP 4,切点分别为点P 3,P 4,则当点P 在P 3处时∠PBA 最大,在P 4处时∠PBA 最小.又|BP 3|=|BP 4|=√|BM |2-r 2=√52+(5-2)2-42=3√2,故C,D 正确.故选A,C,D .10.若a =(-1,λ,-2),b =(2,-1,1),a 与b 的夹角为120°,则λ的值为( ) A.17 B.-17 C.-1 D.1a =(-1,λ,-2),b =(2,-1,1),a 与b 的夹角为120°,∴cos120°=a ·b |a |·|b |=√5+λ2·√6,解得λ=-1或λ=17.11.已知P 是椭圆C :x 26+y 2=1上的动点,Q 是圆D :(x+1)2+y 2=15上的动点,则( ) A.C 的焦距为√5B.C 的离心率为√306C.圆D 在C 的内部D.|PQ|的最小值为2√55c=√6-1=√5,则C的焦距为2√5,e=√5√6=√306.设P(x,y)(-√6≤x≤√6),则|PD|2=(x+1)2+y2=(x+1)2+1-x26=56(x+65)2+45≥45>15,所以圆D在C的内部,且|PQ|的最小值为√45−√15=√55.12.已知直线l过点P(1,0,-1),平行于向量a=(2,1,1),平面α过直线l与点M(1,2,3),则平面α的法向量可能是()A.(1,-4,2)B.(14,-1,12)C.(-14,1,-12) D.(0,-1,1),所研究平面的法向量垂直于向量a=(2,1,1)和向量PM⃗⃗⃗⃗⃗⃗ ,而PM⃗⃗⃗⃗⃗⃗ =(1,2,3)-(1,0,-1)=(0,2,4),选项A,(2,1,1)·(1,-4,2)=0,(0,2,4)·(1,-4,2)=0满足垂直,故正确;选项B,(2,1,1)·(14,-1,12)=0,(0,2,4)·(14,-1,12)=0满足垂直,故正确;选项C,(2,1,1)·(-14,1,-12)=0,(0,2,4)·(-14,1,-12)=0满足垂直,故正确;选项D,(2,1,1)·(0,-1,1)=0,但(0,2,4)·(0,-1,1)≠0,故错误.三、填空题:本题共4小题,每小题5分,共20分.13.过点(1,√2)的直线l将圆x2+y2-4x=0分成两段弧,当劣弧所对圆心角最小时,直线l 的斜率k= .(1,√2)的直线l将圆(x-2)2+y2=4分成两段弧,当劣弧所对的圆心角最小时,就是弦长最小,就是与圆心(2,0)和点(1,√2)的连线垂直的直线,连线的斜率是√2-01-2=-√2,直线l的斜率k=√22.14.(2021新高考Ⅰ,14)已知O为坐标原点,抛物线C:y2=2px(p>0)的焦点为F,P为C上一点,PF与x轴垂直,Q为x轴上一点,且PQ⊥OP.若|FQ|=6,则C的准线方程为.x=-32PF⊥x轴,∴x P=x F=p2,将x P=p2代入y2=2px,得y=±p.不妨设点P在x轴的上方,则P(p2,p),即|PF|=p.如图,由条件得,△PFO∽△QFP,∴|OF||PF|=|PF||QF|,即p2p=p6,解得p=3.故C的准线方程为x=-32.15.如图,在直三棱柱ABC-A1B1C1中,∠ACB=90°,AA1=AC=BC=1,则异面直线BC1与A1B1所成角为;二面角A-BC1-C的余弦值是.√33C 为原点建立如图空间直角坐标系,则A (0,1,0),B (1,0,0),C 1(0,0,1),A 1(0,1,1),B 1(1,0,1),BC 1⃗⃗⃗⃗⃗⃗⃗ =(-1,0,1),A 1B 1⃗⃗⃗⃗⃗⃗⃗⃗⃗ =(1,-1,0),AB⃗⃗⃗⃗⃗ =(1,-1,0).由cos <BC 1⃗⃗⃗⃗⃗⃗⃗ ,A 1B 1⃗⃗⃗⃗⃗⃗⃗⃗⃗ >=|√2×√2|=12,故异面直线BC 1与A 1B 1所成角为π3, 设平面ABC 1的一个法向量为m =(a ,b ,c ),由{m ·BC 1⃗⃗⃗⃗⃗⃗⃗ =-a +c =0,m ·AB⃗⃗⃗⃗⃗ =a -b =0,设a=1,得m =(1,1,1),平面BC 1C 的一个法向量n =(0,1,0),cos <m ,n >=√3=√33.16.已知抛物线的方程为x 2=2py (p>0),过抛物线的焦点,且斜率为1的直线与抛物线交于A ,B 两点,|AB|=8,则p= ,M 为抛物线弧AOB⏜上的动点,△AMB 面积的最大值是 .4√2抛物线的方程为x 2=2py (p>0),过抛物线的焦点F ,且斜率为1的直线与抛物线交于A ,B 两点,故直线AB 的方程为y-p 2=x-0,即y=x+p2,且直线AB 的倾斜角为45°. 代入抛物线的方程x 2=2py ,可得x 2-2px-p 2=0.设A ,B 两点的横坐标分别为m ,n ,m<n ,由根与系数的关系可得m+n=2p ,mn=-p 2.∵|AB|=|AF|+|BF|=(yA +p2)+y B+p2=(m+p2)+p2+(n+p2)+p2=8=m+n+2p=4p=8,∴p=2,故抛物线的方程为x2=4y,直线AB为y=x+1.设与直线AB平行且与抛物线相切的直线方程为y=x+m,代入抛物线方程,得x2-4x-4m=0.由Δ=42+16m=0,得m=-1.与直线AB平行且与抛物线相切的直线方程为y=x-1,两直线间的距离为d=√2=√2,∴△AMB面积的最大值为12·|AB|·d=12×8×√2=4√2.四、解答题:本题共6小题,共70分.解答应写出文字说明、证明过程或演算步骤.17.(10分)求分别满足下列条件的直线l的方程.(1)已知点P(2,1),l过点A(1,3),P到l距离为1;(2)l过点P(2,1)且在x轴,y轴上截距的绝对值相等.当l斜率不存在时,l的方程为x=1,满足条件.当l斜率存在时,设l:y-3=k(x-1),即kx-y+3-k=0,由d=√k2+1=1,得k=-34,即l:3x+4y-15=0.故直线l的方程为x=1或3x+4y-15=0.(2)当直线过原点时,直线的斜率为1-02-0=12,直线l的方程为x-2y=0.当直线截距相等时,设为xa +ya=1,代入(2,1),则a=3,即x+y-3=0.当直线截距互为相反数时,设为xa +y-a=1代入(2,1),则a=1,即x-y-1=0.综上,要求的直线l 的方程为x-2y=0或x+y-3=0或x-y-1=0. 18.(12分)(2021新高考Ⅰ,21)在平面直角坐标系xOy 中,已知点F 1(-√17,0),F 2(√17,0),点M 满足|MF 1|-|MF 2|=2.记M 的轨迹为C.(1)求C 的方程;(2)设点T 在直线x=12上,过T 的两条直线分别交C 于A ,B 两点和P ,Q 两点,且|TA|·|TB|=|TP|·|TQ|,求直线AB 的斜率与直线PQ 的斜率之和.∵|MF 1|-|MF 2|=2,且F 1(-√17,0),F 2(√17,0),∴点M的轨迹为双曲线的右支,且满足{2a =2,c =√17,c 2=a 2+b 2,∴{a 2=1,b 2=16,c 2=17.∴C 的方程为x 2-y 216=1(x ≥1).(2)设T (12,m),显然直线AB 的斜率与直线PQ 的斜率都存在.设直线AB 的方程为y=k 1(x -12)+m ,A (x 1,y 1),B (x 2,y 2), 由{y =k 1(x -12)+m ,16x 2-y 2=16,得16x 2-k 12(x 2-x +14)+2k 1m (x -12)+m2=16,即(16-k 12)x 2+(k 12-2k 1m )x-14k 12+k 1m-m 2-16=0. ∴|TA|·|TB|=(1+k 12)x 1-12x 2-12=(1+k 12)x 1x 2-12(x 1+x 2)+14=(1+k 12)k 1m -14k 12-m 2-1616-k 12−12·2k 1m -k 1216-k 12+14=(1+k 12)-m 2-1216-k 12=(1+k 12)·m 2+12k 12-16.设k PQ =k 2,同理可得|TP|·|TQ|=(1+k 22)·m 2+12k 22-16. ∵|TA|·|TB|=|TP|·|TQ|,∴(1+k 12)·m 2+12k 12-16=(1+k 22)·m 2+12k 22-16. ∴k 22-16k 12=k 12-16k 22.∴k 12=k 22.∵k 1≠k 2,∴k 1=-k 2. ∴k 1+k 2=0.19.(12分)已知椭圆C :x 2a 2+y 2b 2=1(a>b>0)过点A (-2,0),点B 为其上顶点,且直线AB 的斜率为√32.(1)求椭圆C 的方程;(2)设P 为第四象限内一点且在椭圆C 上,直线PA 与y 轴交于点M ,直线PB 与x 轴交于点N ,求证:四边形ABNM 的面积是定值.,设直线AB :y-0=√32(x+2),令x=0,则y=√3,于是B (0,√3), 所以a=2,b=√3, 故椭圆C 的方程为x 24+y 23=1.(2)设P (x 0,y 0)(x 0>0,y 0<0),且3x 02+4y 02=12,又A (-2,0),B (0,√3),所以直线AP :y -0y 0-0=x+2x 0+2,令x=0,y M =2y 0x 0+2,则|BM|=√3-y M =√3−2y 0x 0+2=√3x 0+2√3-2y 0x 0+2. 直线BP :√3y -√3=x -0x 0-0,令y=0,x N =√3x 0y -√3,则|AN|=2+x N=2+√3x0y-√3=0√3-√3x0y-√3.所以四边形ABNM的面积为S=12|BM|·|AN|=1 2×√3x0+2√3-2y0x0+2×0√3-√3x0y-√3=0202√3x000√3y02(x y-√3x+2y-2√3)=√3(00√3x00√3)2(λy-√3x+2y-2√3)=2√3,所以四边形ABNM的面积为定值2√3.20.(12分)如图,在四棱锥P-ABCD中,底面ABCD是菱形,∠ABC=120°,PA=PC,PB=PD,AC∩BD=O.(1)证明:PO⊥平面ABCD;(2)若PA与平面ABCD所成的角为30°,求二面角B-PC-D的余弦值.四边形ABCD是菱形,∴O为AC,BD的中点.又PA=PC,PB=PD,∴PO⊥AC,PO⊥BD.∵AC∩BD=O,且AC,BD⊂平面ABCD,∴PO⊥平面ABCD.ABCD的边长为2t(t>0).∵∠ABC=120°,∴∠BAD=60°,∴OA=√3t.由(1)知PO ⊥平面ABCD ,∴PA 与平面ABCD 所成的角为∠PAO=30°,得到PO=t ,建立如图所示的空间直角坐标系,则B (0,t ,0),C (-√3t ,0,0),P (0,0,t ),D (0,-t ,0),得到BP ⃗⃗⃗⃗⃗ =(0,-t ,t ),CP⃗⃗⃗⃗⃗ =(√3t ,0,t ). 设平面PBC 的法向量n 1=(x 1,y 1,z 1),平面PCD 的法向量n 2=(x 2,y 2,z 2).则{n 1·BP ⃗⃗⃗⃗⃗=0,n 1·CP ⃗⃗⃗⃗⃗=0,即{-ty 1+tz 1=0,√3tx 1+tz 1=0.令x=1,则y=z=-√3,得到n 1=(1,-√3,-√3). 同理可得n 2=(1,√3,-√3),所以|cos <n 1,n 2>|=|n 1·n 2||n 1||n 2|=17.因为二面角B-PC-D 为钝二面角,则余弦值为-17.21.(12分)在平面直角坐标系xOy 中,曲线Γ:y=x 2-mx+2m (m ∈R )与x 轴交于不同的两点A ,B ,曲线Γ与y 轴交于点C.(1)是否存在以AB 为直径的圆过点C ?若存在,求出该圆的方程;若不存在,请说明理由. (2)求证:过A ,B ,C 三点的圆过定点,并求出该定点的坐标.由曲线Γ:y=x 2-mx+2m (m ∈R ),令y=0,得x 2-mx+2m=0. 设A (x 1,0),B (x 2,0),则可得Δ=m 2-8m>0,x 1+x 2=m ,x 1x 2=2m. 令x=0,得y=2m ,即C (0,2m ).若存在以AB 为直径的圆过点C ,则AC⃗⃗⃗⃗⃗ ·BC ⃗⃗⃗⃗⃗ =0,得x 1x 2+4m 2=0,即2m+4m 2=0, 所以m=0或m=-12.由Δ>0,得m<0或m>8,所以m=-12,此时C (0,-1),AB 的中点M (-14,0)即圆心,半径r=|CM|=√174.故所求圆的方程为(x +14)2+y 2=1716. (2)设过A ,B ,C 的圆P 的方程为(x-a )2+(y-b )2=r 2满足{(x 1-a )2+b 2=r 2,(x 2-a )2+b 2=r 2,a 2+(2m -b )2=r 2,x 1x 2=2m ,x 1+x 2=m⇒{ a =m2,r 2=5m 24-m +14,b =m +12,代入P 得(x -m 2)2+y-m-122=5m 24-m+14,展开得(-x-2y+2)m+x 2+y 2-y=0, 当{-x -2y +2=0,x 2+y 2-y =0,即{x =0,y =1或{x =25,y =45时方程恒成立, ∴圆P 方程恒过定点(0,1)或(25,45).22.(12分)某高速公路隧道设计为单向三车道,每条车道宽4米,要求通行车辆限高5米,隧道全长1.5千米,隧道的断面轮廓线近似地看成半个椭圆形状(如图所示).(1)若最大拱高h 为6米,则隧道设计的拱宽l 至少是多少米?(结果取整数)(2)如何设计拱高h 和拱宽l ,才能使半个椭圆形隧道的土方工程量最小?(结果取整数) 参考数据:√11≈3.3,椭圆的面积公式为S=πab ,其中a ,b 分别为椭圆的长半轴和短半轴长.建立直角坐标系xOy如图所示,则点P(6,5)在椭圆x2a2+y2b2=1上,将b=h=6与点P(6,5)代入椭圆方程,得a=√11,此时l=2a=√11≈21.8,因此隧道设计的拱宽l至少是22米.(2)由椭圆方程x2a2+y2b2=1,得36a2+25b2≤1,因为1≥36a2+25b2≥2×6×5ab,即ab≥60,S=πab2≥30π,当且仅当6a=5b时,等号成立.由于隧道长度为1.5千米,故隧道的土方工程量V=1.5S≥45π,当V取得最小值时,有6a =5b,且ab=60,得a=6√2,b=5√2,此时l=2a=12√2≈16.97,h=b≈7.07.①若h=b=8,此时l=2a=17,此时V1=3πab4=3×17×8π8=51π,②若h=b=7,此时l=2a=18,此时V2=3πab4=3×9×7π4=47.25π,因为V1>V2,故当拱高为7米、拱宽为18米时,土方工程量最小.。
第07讲 选修1-2模块综合检测题 含解析 精品
选修1-2模块综合检测题本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分.满分150分.考试时间120分钟.第Ⅰ卷(选择题 共60分)一、选择题(本大题共12个小题,每小题5分,共60分,在每小题给出的四个选项中,只有一项是符合题目要求的)1.复数21-i 等于( )A .1+iB .1-iC .-1+iD .-1-i2.下列推理正确的是 ( )A .如果不买彩票,那么就不能中奖.因为你买了彩票,所以你一定中奖B .因为a >b ,a >c ,所以a -b >a -cC .若a >0,b >0,则lg a +lg b ≥2lg a ·lg bD .若a >0,b <0,则a b +ba =-⎝⎛⎭⎫-a b+-b a ≤-2⎝⎛⎭⎫-a b ·⎝⎛⎭⎫-b a =-23.a =0是复数a +b i(a 、b ∈R)为纯虚数的( ) A .充分不必要条件B .必要不充分条件 C .充要条件D .既不充分也不必要条件4.工人月工资(元)依劳动生产率(千元)变化的回归直线方程为y =60+90x ,下列判断正确的是( )A .劳动生产率为1000元时,工资为50元B .劳动生产率提高1000元时,工资提高150元C .劳动生产率提高1000元时,工资提高90元D .劳动生产率为1000元时,工资为90元5.在如图所示的知识结构图中:“求简单函数的导数”的“上位”要素有( )A .1个B .2个 C. 3个 D .4个6.根据如下样本数据得到的回归直线方程为y bx a =+,则()7.复数5i -2的共轭复数是( )A .2-iB .-2-iC .2+iD .-2+i8.按下图所示的程序框图运算:若输出2k =,则输入x 的取值范围是( )A .(]20,25B .(]30,57 C. (]30,32 D .(]28,579.在一次独立性检验中,得出2×2列联表如下:最后发现,两个分类变量x 和y 没有任何关系,则m 的可能值是( ) A .200B .720C .100D .18010.“金导电,银导电,铜导电,铁导电,所以一切金属都导电”.此推理方法是() A.完全归纳推理B.归纳推理C.类比推理D.演绎推理11.已知数列{a n}的前n项和S n=n2·a n(n≥2),而a1=1,通过计算a2,a3,a4猜想a n 等于()A.2n+2B.2n n+C.22n-1D.2 2n-112.满足条件|z-i|=|3-4i|的复数z在复平面上对应点的轨迹是()A.一条直线B.两条直线C.圆D.椭圆第Ⅱ卷(非选择题共90分)二、填空题(本大题共4个小题,每小题5分,共20分,把正确答案填在题中横线上)13.若一组观测值(x1,y1),(x2,y2),…,(x n,y n)之间满足y i=a+bx i+e i(i=1,2,…,n),若e i恒为0,则R2等于________.14.某地联通公司推出10011电话服务,其中话费查询业务流程如下:如果某人用手机查询该机卡上余额,该如何操作?________.15=,==,则a、b的值分别是.16.将全体正整数排成一个三角形数阵:12 3 4 5 6 7 8 9 10 11 12 13 14 15 … … … … … …根据以上排列规律,数阵中第n (n ≥3)行的从左至右的第3个数是________.三、解答题(本大题共6个小题,共70分,解答应写出文字说明,证明过程或演算步骤) 17.(本小题满分10分)设,,a b c 都大于零,证明111,,a b c b c a+++至少有一个不小于2 .18.(本小题满分12分) 在中学生综合素质评价某个维度的测评中,分“优秀、合格、尚待改进”三个等级进行学生互评.某校高一年级有男生500人,女生400人,为了了解性别对该维度测评结果的影响,采用分层抽样方法从高一年级抽取了45名学生的测评结果,并作出频数统计表如下:表1:男生 表2:女生(1)从表二的非优秀学生中随机选取2人交谈,求所选2人中恰有1人测评等级为合格的概率;(2)由表中统计数据填写下边2×2列联表,并判断是否有90%的把握认为 “测评结果优秀与性别有关”.参考数据与公式:K 2=()()()()()2n ad bc a b c d a c b d -++++,其中n=a+b+c+d .临界值表:19.(本小题满分12分)用综合法或分析法证明: (1)如果a >0,b >0,那么lg a +b 2≥lg a +lg b 2;(2)设x >0,y >0,求证:(x 2+y 2)12>(x 3+y 3)13.20.(本小题满分12分)高考成绩公布后,考生如果认为公布的高考成绩与本人估算的成绩有误,可以在规定的时间申请查分.(1)本人填写《查分登记表》交县(区)招办申请查分,县(区)呈交市招办,再报省招办; (2)省招办复查,无误,则查分工作结束后通知;有误,则再具体认定,并改正,也在查分工作结束后通知;(3)市招办接通知,再由县(区)招办通知考生. 试画出该事件的流程图.21.(本小题满分12分) 已知复数()()262211mz i m i i=+----当实数m 取什么值时,复数Z 是:(1)零 ;(2)虚数;(3)纯虚数;(4)复平面内第二、四象限角平分线上的点对应的复数.22.(本小题满分12分) 2015年12月,京津冀等地数城市指数“爆表”,北方此轮污染为2015年以来最严重的污染过程.为了探究车流量与PM2.5的浓度是否相关,现采集到北方某城市2015年12月份某星期星期一到星期日某一时间段车流量与PM2.5的数据如表:(Ⅰ)由散点图知y 与x 具有线性相关关系,求y 关于x 的线性回归方程;(Ⅱ)(ⅰ)利用(Ⅰ)所求的回归方程,预测该市车流量为8万辆时PM2.5的浓度; (ⅱ)规定:当一天内PM2.5的浓度平均值在(]0,50内,空气质量等级为优;当一天内PM2.5的浓度平均值在(]50,100内,空气质量等级为良.为使该市某日空气质量为优或者为良,则应控制当天车流量在多少万辆以内?(结果以万辆为单位,保留整数.)参考公式:回归直线的方程是y bx a =+,其中1221ni ii nii x y nx yb xnx==-=-∑∑,a y bx =-.选修1-2模块综合检测题参考答案【第1题解析】1-i 2=(1-i(1+i 2(1+i =22(1+i=1+i.故选A.【第2题解析】由题得D 选项正确.故选D.【第3题解析】a =0时,a +b i=bi 不一定是纯虚数;但是a +b i 是纯虚数时,a=0一定成立,所以a =0是复数a +b i(a 、b ∈R)为纯虚数的必要非充分条件.故选B.【第6题解析】由题得y 随着x 的增大而减小,所以b<0.画草图得当x=0时,y=a>0,故选择B.【第7题解析】i -25==-2-i.∴i -25的共轭复数为-2+i. 故选D.【第8题解析】输入,,,判断否,,,判断是,,输出,故所以,故选D.【第9题解析】由题得|ad-bc|=0,所以180×800-200m=0,所以m=720. 故选B. 【第10解析】由归纳推理的定义得选B ,故选B.【第11题解析】∵a 1=1,S n =n 2·a n ,∴a 1+a 2=22·a 2,⇒a 2=31;由a 1+a 2+a 3=32·a 3,得a 3=61;由a 1+a 2+a 3+a 4=42·a 4, 得a 4=101…,猜想a n =n(n +12.故选B.【第12题解析】|z -i|=|3-4i|=5,∴复数z 对应点到定点(0,1)的距离等于5,故轨迹是个圆.故选C.【第13题解析】由于e i恒为0,即解释变量与预报变量成函数关系,此时两变量间的相关指数R2=1.故填1.【第14题解析】填该人用手机拨通10011电话,按1号键,再按2号键,便可查询该手机卡上的余额.【第15题解析】因为,所以,所以答案应填.【第17题解析】证明:假设,则则因为都大于零所以所以与矛盾所以假设不成立,所以至少有一个不小于2 .【第18题答案】(1);(2)列联表见解析,没有%的把握认为“测评结果优秀与性别有关”.【第18题解析】(1)设从高一年级男生中抽出m人,则=,m=25,∴x=25﹣20=5,y=20﹣18=2,表2中非优秀学生共5人,记测评等级为合格的3人为a,b,c,尚待改进的2人为A,B,则从这5人中任选2人的所有可能结果为:(a,b)(a,c)(b,c)(A,B)(a,A),(a,B),(b,A)(,b,B),(c,A)(c,B),共10种.设事件C表示“从表二的非优秀学生5人中随机选取2人,恰有1人测评等级为合格”,则C的结果为:(a,A),(a,B),(b,A)(,b,B),(c,A)(c,B),共6种.∴P(C)==,故所求概率为.(2)∵1﹣0.9=0.1,p(k2>2.706)=0.10,而K2====1.125<2.706,所以没有90%的把握认为“测评结果优秀与性别有关”.【第19题答案】见解析∴lg 2a +b ≥2lga +lgb .分析法:∵a >0,b >0,∴a +b >0,要证lg 2a +b ≥2lga +lgb ,只需证2lg 2a +b ≥lg ab ,即证lg(2a +b )2≥lg ab ,只需证(2a +b )2≥ab ,即证(a +b )2≥4ab ,即证(a -b )2≥0.而(a -b )2≥0恒成立.故原不等式成立.(2)∵x >0,y >0,∴要证明(x 2+y 2)21>(x 3+y 3)31,只需证明(x 2+y 2)3>(x 3+y 3)2,即证x 2y 2(3x 2-2xy +3y 2)>0,只需证3x 2-2xy +3y 2>0.∵3x 2-2xy +3y 2=3(x -3y )2+38y 2>0成立, ∴原式成立.【第20题答案】见解析.【第20题解析】流程图如下:【第21题答案】(1)(2)(3)(4)【第21题解析】【第22题答案】(Ⅰ);(Ⅱ)(ⅰ)微克/立方米;(ⅱ)控制当天车流量在万辆以内.,故关于的线性回归方程为,(Ⅱ)(ⅰ)当车流量为万辆时,即时,.故车流量为万辆时,的浓度为微克/立方米.(ⅱ)根据题意信息得:,即.故要使该市某日空气质量为优或为良,则应控制当天车流量在万辆以内.。
五年级外研版 Module 1-2 课后练习
1.He _____ a teacher before.A. wereB. wasC. is2.They _____ violin players in 2017.A. wasB. areC. were3.I _____ very busy before.A. isB. wereC. was4.You _____ a policeman in 2010.A. wereB. isC. was5.We _____ students before.A. areB. wereC. am答案解析1.【答案】B【解析】此题考查一般过去时。
句意为:他以前是一位老师。
由标志词before可知,此题应用一般过去时,排除C;主语He是单数,故选B。
2.【答案】C【解析】此题考查一般过去时。
句意为:他们在2017年是小提琴演奏者。
由标志词in 2017可知,此题应用一般过去时,排除B;主语They是复数,故选C。
3.【答案】C【解析】此题考查一般过去时。
句意为:我之前非常忙。
由标志词before可知,此题应用一般过去时,排除A;主语I是单数,故选C。
4.【答案】A【解析】此题考查一般过去时。
句意为:你在2010年是一名警察。
由标志词in 2010可知,此题应用一般过去时,排除B;主语是You,be动词用were,故选A。
5.【答案】B【解析】此题考查一般过去时。
句意为:我们曾经是学生。
由标志词before可知,此题应用一般过去时,故选B。
2019年秋季外研版英语八年级上册 Modules 1~2 综合练习 包含答案
外研版英语八年级上册Modules 1~2 综合练习一、用括号内所给单词的适当形式填空。
1.He often advises her (eat) healthy food.2.It is sometimes difficult (understand) American and British people. 3.Many students are afraid (take) an English exam.4.I can't understand the (mean) of all the new words.5.(walk) is good for our health.6.Which one is (low), the white door or the yellow door?7.The cat (it) has a very nice small house.8.There are many old family houses in the city (visit).9.Some (tour) are enjoying the beautiful songs at the moment. 10.This is a comfortable city with some beautiful (beach).二、根据汉语意思完成句子,每空一词。
1.Han Mei lives in Beijing with her family (一直). 2.Everyone (同意) me at the class meeting yesterday. 3.(……很难) finish the work in such a short time. 4.You should (向……问好) your friends.5.If you have any difficulties, please your teacher (向……寻求帮助).6.Is the city (……的首都) America?7.They live in a small village (在沿海).8.Tom is (因……而闻名) his songs.9.Is Shanghai bigger than (其他任何一座城市) in China? 10.The population of China (比……多) that of Australia.三、完形填空。
Modules 1-2综合能力测试 (2)
七年级(上)Modules 1-2综合能力测试基础知识运用(20分)I.单项选择。
(每小题1分,共10分)( ) 21. Mary is twelve years old ________ she’s a student.A. butB. andC. or( ) 22. — _______________________?—My name’s Tom.A. How old are youB. Where are you fromC. What’s your name( ) 23. — Are they in Class 2?—______________. I am in Class 2, too.A. Yes, they areB. No, he isn’tC. No, they aren’t( ) 24. — ___________________?—We’re from China.A. Are you from AmericaB. What’s your na meC. Where are you from ( ) 25. Meimei, Ma Ling and Wang Hui _________ Chinese.A. amB. areC. is( ) 26. My mother is a __________ in this _________.A. doctor; hotelB. teacher; universityC. factory worker; hospital ( ) 27. He __________ Tom. He ________ Tom’s brother, Nick.A. isn’t; isB. isn’t; isn’tC. is; is( ) 28. — Is your brother a teacher?—___________. He is a worker.A. Yes, he isB. No, he doesn’tC. No, he isn’t( ) 29. Dick _________ play basketball, but he can’t play table tennis.A. can’tB. canC. is( ) 30. I’m not from _________ and I’m not ______.A. American; AmericanB. American; AmericaC. America; AmericanII.完形填空。
新教材高中英语模块综合检测(含解析)新人教版
模块综合检测第一部分阅读理解(共两节,满分 50 分)第一节(共 15 小题;每小题 2.5 分,满分 37.5 分)阅读下列短文,从每题所给的A、B、C、D 四个选项中选出最佳选项。
AAlthough being the secondsmallest independent state,only 0.7 square mile in the world,Monaco benefits from an excellent climate and beautiful settings between the Mediterranean Sea and France.Monte Carlo is its only city and capital.AttractionsEvery May Monaco has car racing events such as the Monaco Grand Prix.In the main harbour,expensive yachts and boats make Monaco a good destination for the rich and fa,zoos and gardens are tourist attractions,so are the beaches,the royal palace and the opera house.HistoryMonaco was built by the Phoenicians who occupied the area from the 10th to the 5th century B.C.The House of Grimaldi has ruled Monaco since 1297,Monaco was under the protection of Rome,France,Spain,and Sardinia.In 1612 when Honore Ⅱ was granted the title of prince by the French crown,he signed a treaty of friendship with France,and the country has remained independent from that time on.People and ReligionHalf of the residents of Monaco are the French with many Americans,Italians,the British and Belgians making up the other half.Although the official religion of Monaco is Roman Catholic,there is religious freedom in this Frenchspeaking country.GovernmentPrince Rainier Ⅲ rules the country with a minister of state who is French.A National Council with 18 members must approve laws.Its legend was further spread by the marriage of Prince Rainier Ⅱ to the American actress Grace Kelly in 1956.【语篇解读】本文为一篇说明文。
外研英语高一英语模块一-二检测题及答案
高一年级英语试题笔试部分二、单词拼写(共10小题,每小题1分,满分10分)21、My history teacher is very a . He always makes us laugh inthe lesson.22、Xiao Ming is a very i boy. He knows the answer to any question.23、I like m because I enjoy working out problems about number.24、What's you a towards this question?25、I am (惊异) by what you have told me.26、You should give clear (说明) for all the exercises.27、I was (尴尬) by his comments(评论) about my clothes.28、The more he worked, the more (精力充沛的) he became.29、Doing enough (翻译)exercises can improve your composition.30、He was lying in the sun looking very (放松).三、完成句子(共10小题,每小题2分,满分20分)31、The school year (被分成)two semester.32、 (换句话说), the size of Asia is four timesof Europe.33、They painted the walls (在……开始)the year.34、(结果) my work is improving.35、Mrs Li just smiles, (因此)you don't feelcompletely stupid.36、All the children are (盼望)the SpringFestival.37、I suggest you (做) the experiment in another way.38、It is interesting to look at (……之间的差别)schools in different countries.39、My (最初印象) of Mrs Li was that she was nervousand shy.40、The students (参加)all kinds of activitiesafter class.四、单项选择(共5小题,每小题1分,满分5分)41、I'll never forget Paris for the first time.A. to visitB.visitC. visitingD. visited42、It is reported that the USA usesA. as twiceB. twice muchC. twice much asD. twice as much43、The listeners got at the speech by Mr. smith.A. exciting; excitingB. excited; excitedC. exciting; excitedD. excited; exciting44、I'm sorry I can't go. I a report.A. writeB. am writingC. wroteD. was writing45、---- Whose advice do you think I should take?---- .A You speak. B. That's it. C. It's up to you. D. You do it.五、语言结构(共10小题;每小题分,满分10分)仔细阅读下面的短文,短文中有10个空格或划线句子。
21-22版:模块综合试卷一(第一~二章)(步步高)
一、选择题(本大题共12小题,每小题5分,共60分)
1.已知数列{an}的通项公式为an=n2-2n-8(n∈N*),则a4等于
A.1
B.2
√C.0
D.3
解析 因为an=n2-2n-8(n∈N*), 所以a4=42-2×4-8=16-8-8=0.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
8.一个首项为23,公差为整数的等差数列,从第7项开始为负数,则它
的公差是
A.-2
√ B.-3 C.-4
D.-6
解析 由题意,知a6≥0,a7<0. ∴aa11+ +56dd= =2233+ +56dd≥ <00,, ∴-253≤d<-263. ∵d∈Z,∴d=-4.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
二、填空题(本大题共4小题,每小题5分,共20分) 13.在△ABC中,三内角A,B,C分别对应三边a,b,c,tan C=4 ,c=
3 8,则△ABC外接圆的半径R为___5__.
解析 由 tan C=43>0 且 C∈(0,π)得 C∈0,π2. 由同角三角函数的基本关系式,得 cos C= 1+t1an2C=35,sin C=
解 设等比数列{bn}的公比为q(q>0), 由b1=1,b2=b3-2,可得q2-q-2=0, ∴q=2,∴bn=2n-1. ∴Tn=11--22n=2n-1. 又设等差数列{an}的公差为d, 由b4=a3+a5,可得a1+3d=4; 由b5=a4+2a6,可得3a1+13d=16, ∴a1=d=1,∴an=n.
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模块一、二综合练习题答案12一.判断题31、计算车外圆的切削速度时,应按照已加工表面的直径数值进行计算。
(×)42、刀具前角的大小,可以是正值,也可以是负值。
(√)53、刀具的主偏角具有影响切削力、刀尖强度、刀具散热的作用。
(√)64、金属的切削过程也是形成切屑和已加工表面的过程。
(√)75、精加工相对于粗加工而言,刀具应选择较大的前角和较小的后角。
(×)86、刃倾角的作用是控制切屑的流动方向并影响刀头的强度,所以粗加工应选负值。
(√)9107、切削加工中,常见机床的主运动一般只有一个。
(√)118、工艺系统刚性较差时(如车削细长轴),刀具应选用较大的主偏角。
(√)129、粗车主要目的是切除工件上的大部分余量,精车的主要目的是保证工件的精度和减13小表面粗糙度Ra值。
(√)1410、车削加工不宜加工硬度在30HRC以上的淬火钢。
(√)11、90度车刀(偏刀),主要用来车削工件的外圆、端面和台阶。
(√)151612、一夹一顶装夹,适用于工序较多、精度较高的工件。
(×)1713、两顶尖装夹方式适用于装夹重型轴类零件。
(×)14、两顶尖装夹粗车工件,由于支承点时顶尖,接触面积小,不能承受较大切削力,1819不宜使用。
(√)2015、车削内孔时排屑和冷却较困难。
(√)16、圆柱孔的测量比外圆测量困难。
(√)212217、车削套类零件的刀柄受孔径及孔深的影响,刚性较差。
(√)18、麻花钻可以在实心材料上加工内孔,不能用来扩孔。
(×)232419、车孔时的切削用量应比车外圆低一些。
(√)2520、细长轴通常用一夹一顶或两顶尖装夹的方法来加工。
(√)2621、为了防止和减少薄壁零件工件加工时产生变形,加工时应分粗、精车。
(√)2722、车削薄壁零件时,尽量不用径向夹紧法,最好用轴向夹紧法。
(√)2823、车削短小套类零件时,为保证内、外圆轴线的同轴度,可用一次装夹车削。
(√)24、在立式铣床上不能加工键槽。
(×)293025、卧式铣床主轴的中心轴线与工作台面垂直。
(×)3126、精铣时一般选用较高的切削速度、较小的进给量和切削深度。
(√)27、在板块工件上铣直槽,一般用三面刃铣刀。
(√)323328、在轴上的平键槽,一般在立铣床上用键槽铣刀加工。
(√)3429、插床也是利用工件和刀具作相对直线往复运动来切削加工的,它又称为立式刨床。
35(√)3630、刨削加工常用在大批大量的生产中。
(×)3731、现在很多应用场合,铣床常被用来代替刨床加工。
(√)3832、在镗床上镗孔可以保证箱体类零件上孔系间的位置精度。
(√)3933、拉削一般用于单件小批生产。
(√)4034、砂轮的硬度就是磨粒的硬度。
(×)4135、磨削外圆时,工件的转动是主运动。
(×)36、砂轮的磨粒号越大,磨粒尺寸也越大。
(×)424337、砂轮是由磨粒、结合剂和空隙组成的多孔物体。
(√)4438、磨削实际上是一种多刃刀具的超高速切削。
(√)4539、淬火后零件的后道加工,比较适宜的方法是磨削。
(√)4640、工件材料的硬度越高,选用的砂轮硬度也应越高。
(×)4741、有色金属的精加工适合采用磨削的方式。
(×)4842、由于拉刀一次行程就能把该工序的待加工表面加工完毕,故其生产率很高。
49(√)5043、拉削加工能校正原有孔的位置精度。
(×)5144、拉削加工由于拉刀以低速运动,所以生产率较低。
(×)45、拉削加工只有一个主运动,生产率很低,适于各种批量的生产。
(×)525346、刨削和插削的主要区别是主运动的形式不同。
(×)5447、拉床上只有一个主运动而无进给运动。
(√)5548、镗床只能加工通孔,而不能加工盲孔。
(×)5649、粗磨时应选粒度号大的磨粒,精磨时则应选细的磨粒。
(×)5750、砂轮硬度选择原则是:磨硬材料应选软砂轮,磨软材料应选硬砂轮。
(√)5851、砂轮的组织号越大,磨料所占的体积百分比越大。
(×)5952、用前后顶尖安装轴类零件是外圆磨床上最常用的安装工件的方法。
(√)6061二.填空题621 、在切削运动中,按其功用可分为__主运动__和__进给运动___。
632 、切削用量三要素是指_切削速度__、_进给量__和__背吃刀量__。
643、在正交平面内测量的前刀面与基面之间的夹角称为_前角_,主后刀面与切削平面65之间的夹角称为_后角_。
66674、刀具角度中,前角的作用是使刀具锋利,后角的作用是减少与工件过渡表面的68摩擦。
5、刀具正常磨损的主要形式有 _前刀面磨损_、_后刀面磨损_ 和_边界磨损。
69706、刀具磨损一般经历初期磨损、正常磨损、急剧磨损三个阶段。
717、切削液的作用是_冷却_、_润滑_ 、__清洗__ 和_防锈_。
728、切削用量选择的顺序是:先选__背吃刀量__再选_进给量__最后选__切削速度_。
739、产生积屑瘤的条件是中温中速,加工塑性材料。
7410、总切削力可分解主切削力、径向力、轴向力三个分力。
11、切削热来源于摩擦和变形。
757612、刀具的刃倾角是主切削刃和基面之间的夹角。
7713、加工脆性材料宜选用 YG 类硬质合金,加工塑性材料宜选用 YT 类硬质合金。
14、常见的切屑种类有带状切屑、挤裂切屑、崩碎切屑三种。
787915、在钻床上钻孔时,钻头的旋转是主运动,钻头的轴向移动是进给运动;80在车床上钻孔时,工件的旋转是主运动,刀具的直线移动是进给运动。
8116、车削刚性较差的细长轴时,车刀主偏角应选用 90°为宜,主要是为82减小径向力切削力的大小。
8317、轴类零件主要用于_支持传动件_以及__传递运动和扭矩__。
18、一般轴类零件常用__45钢__作材料;中等精度而转速高的轴可用__40Cr_;高转8485速、重载荷条件下工作的轴可选__20CrMnTi _。
8619、按结构形式不同分类,车刀可分为整体式车刀、焊接式车刀、机夹重磨式车刀和8788机夹可转位车刀等。
20、孔常用的加工方法有_ 钻孔 _、_铰孔 _、_镗孔_、_ 磨孔_等。
899021、轴类零件上的圆柱表面一般用于支承和配合。
9122、铣削时,铣刀的旋转是主运动,工件的左右、前后、上下直线移动的运动92是进给运动。
9323、加工中小型工件上的平面、沟槽等多用卧式铣床和立式铣床;加工大型94工件上的平面、沟槽则常用龙门铣床。
24、铣削平面可选择的铣刀有圆柱铣刀、端铣刀和立铣刀。
959625、铣床的主要附件有万能分度头、平口钳、回转工作台和立铣头。
9726、根据圆柱铣刀旋转方向与工件移动方向之间的相互关系,铣削可分为顺铣和逆铣两种方式。
989927、铣削加工精度一般为 IT7-8 ,表面粗糙度Ra值一般为 1.6—3.2μm 。
0028、B665牛头刨床其后两位数字的含义是最大加工长度650mm 。
主运动是刨刀的01往复直线运动,进给运动是工件的前后、上下直线运动;龙门刨床主运动是工件的02往复直线运动,进给运动是刀具的直线运动。
0329、磨削加工精度可达 IT5-7 ,表面质量较好,Ra值可达 0.32-1.25μm 。
高精度磨削时表面粗糙度Ra值可达 0.01μm 。
040530、磨削的加工范围很广,可磨削零件的外圆柱面、内圆柱面、平面及06成形表面。
0731、M1432A型万能外圆磨床的主运动为砂轮的旋转,进给运动为工件的旋转、08工件的纵向直线运09动、砂轮的间歇横向进给运动。
1032、在外圆磨床上磨外圆有纵磨法和横磨法两种方法,纵磨法适于精磨11及磨削较长的工件,12横磨法适于磨削刚性较好或有台阶的轴颈。
33、砂轮的特性取决于磨料、结合剂、粒度、硬度、组织。
砂1314轮常用的磨料有15刚玉和硅碳化物两大类。
1634、磨削是机器零件的精密加工方法,可达到很高的尺寸精度和表面17质量,磨削能加工一般金属材料,又能加工难以切削的淬火材料及高硬度材料18等。
1935、镗削的主运动是镗刀的旋转运动2036、平面磨削可分为端磨法和周磨法两种方法。
21三.选择题22231、扩孔钻扩孔时的背吃刀量(切削深度)等于( D )24A扩孔前孔的直径 B扩孔钻直径的1/225C扩孔钻直径 D扩孔钻直径与扩孔前孔径之差的1/2262、在切削平面内测量的角度有( C )27A前角和后角 B主偏角和副偏角28C刃倾角 D工作角度293、切削用量中对切削热影响最大的是( A )30A切削速度 B进给量31C切削深度 D三者都一样324、通过切削刃选定点的基面是( A )A垂直于主运动速度方向的平面 B与切削速度平行的平面3334C与加工表面相切的平面 D工件在加工位置向下的投影面5、刀具磨钝的标准是规定控制( D )3536A刀尖磨损量 B后刀面磨损高度37C前刀面月牙凹的深度 D后刀面磨损宽度386、确定刀具标注角度的参考系选用的三个主要基准平面是( C )39A切削表面、已加工表面和待加工表面 B前刀面、后刀面和副后刀面40C基面、切削平面和正交平面 D水平面、切向面和轴向面7、当刀具产生了积屑瘤时,会使刀具的( B )4142A前角减小 B前角增大 C后角减小 D后角增大438、车削时,切削热最主要的散热途径是( C )A工件 B刀具 C切屑 D周围介质44459、在正交平面内标注的角度有( A )46A前角和后角 B主偏角和副偏角 C刃倾角 D工作角度4710、切削铸铁工件时,刀具的磨损部位主要发生在(B )48A前刀面B后刀面C前、后刀面D副后刀面4911、粗车钢材工件时,刀具的磨损部位主要发生在( A )50A前刀面B后刀面C前、后刀面D副后刀面5112、车削时切削热传出途径中所占比例最大的是( C )52A刀具B工件 C切屑 D周围介质5313、ISO标准规定刀具的磨钝标准是控制( B )A沿工件径向刀具的磨损量B后刀面上平均磨损带的宽度VB5455C前刀面月牙洼的深度KT D前刀面月牙洼的宽度14、对铸铁材料进行粗车,宜选用的刀具材料是( D )A YT15(P10)B YT5(P30)C YG3X(K01)D YG8(K20)15、下列刀具材料中,适宜制造形状复杂的机用刀具的材料是( C )A碳素工具钢 B人造金刚石 C高速钢 D硬质合金5616、重要的轴类零件的毛坯通常应选择( B )。
157A铸件B锻件C棒料D管材15817、曲轴的毛坯常用15960( A )61A铸件 B锻件 C棒料 D管材6218、调质处理一般安排在( B )。
63A 粗加工前B 粗加工与半精加工之间C 精加工之后D 任意19、车床主轴常采用( A )作为毛坯。