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甘州区马神庙街小学2017年秋学期学科竞赛试卷年级 试题（最后还有说明，请认真查看） 听力部分（40分）（分部分标题，居中，三号黑体）一、 找出与你所听到的顺序相符的一组字母。

（10分）（一级标题，黑体四号）( ) 1. A. MWU B. UWM C. WMU ( ) 2. A. BDQ B. QDB C. DSQ( ) 3. A. SXZ B. ZSX C. XSZ ( ) 4. A. a i e B. e i a C. i e a( ) 5. A. r u v B. v u r C. u r v（试题正文部分，中文选择仿宋小四号，英文默认字体小四号）二、 找出你所听到的单词。

（10分）( ) 1. A. nurse B. doctor C. farmer ( ) 2. A. jeans B. jacket C. trousers ( ) 3. A.socks B. shoes C. skirt ( ) 4. A. carrot B. warm C. lemon ( ) 5. A. thirteen B. eighteen C. nineteen三、 找出你听到的句子。

（10分）( ) 1. A. It’s nice today . B. It’s fine today . C. It’s cold today . ( ) 2. A. Put on your shirt . B. Please show me that jacket .C. Can I try it on ?( ) 3. A. We look short and fat . B. We look like twins .C. We look tall and thin .( ) 4. A. My Dad is a postman . B. Your father is a pliceman .C. They’re really cool .( ) 5. A. It has long ears and a big mouth .B. It has a short tail and long ears .C. It has long ears and big eyes .四、 听句子，选择最佳答语。

档案系列中、初级职称题库及答案一、单选题1.国家档案馆保管的（ A. 经济类）档案可以随时向社会开放。

A.经济类B.外交类C.公安类D. 军事类★2.国家档案馆保管的（ A.涉及国防、外交、公安、国家安全等国家重大利益的）档案到期仍不宜开★放的，可以延期向社会开放。

精品财会，给生活赋能A.涉及国防、外交、公安、国家安全等国家重大利益的B.科学类C.技术类D.文化类3.对擅自出卖或者转让档案的，给予警告，可以并处罚款，有违法所得的，应（ A. 没收违法所得）。

A.没收违法所得B.责令退回C.暂时冻结D.责令返还★4.对明知所保存的档案面临危险而不采取措施造成档案损失的，直接负责的主管人员或其他责任★人，应当承担下列哪种法律责任？（ C.给予行政处分，对构成犯罪的依法追究刑事责任）A.调离岗位B.罚款C.给予行政处分，对构成犯罪的依法追究刑事责任D. 通报批评★ 5.档案行政处罚的种类，除罚款、没收违法所得以外，还包括（ B.警告）。

★A.行政处分B.警告C.刑事拘留D.以上都不对★ 6.携运禁止出境的档案或其复制件在出境时被查获，由（ A.海关）予以没收，还可并处罚款。

★A.海关B.工商行政管理部门C.档案行政管理部门D.国家综合档案馆★ 7.国家档案馆保管的档案，一般应当自形成之日起，满（ C.30 年）年可以向社会开放。

★A.10 年B.20 年C.30 年D.50 年★8.全国档案馆的设置原则和布局方案，由（A.国家档案局）制定，报国务院批准后实施。

★A.国家档案局B.文化部C.中央办公厅D.国务院办公厅9. 属于县级国家综合档案馆接收范围的档案，立档单位应当自档案形成之日起满（ D.10 ）年向有关的国家档案馆移交。

A.30B.25C.15D.10★10.属于集体所有、个人所有的档案，向各级国家档案馆以外的单位和个人出卖、转让或者赠送的，★需经（ C.县级以上人民政府档案行政管理部门）批准。

During my second year at the city college, I was told that the education department was offering a “free” course, called Thinking Chess, for three credits. I41 the idea of taking the class because, after all, who doesn’t want to42 a few dollars? More than that, I’d always wanted to learn chess. And, even if I weren’t43 enough about free credits, news about our 44 was appealing enough to me. He was an international grand master, which 45 I would be learning from one of the game’s46 I could hardly wait to 47 him.Maurice Ashley was kind and smart, a former graduate returning to teach, and this 48 was no game for him; he meant business. In his introduction, he made it 49 that our credits would be hard-earned. In order to 50 the class among other criteria, we had to write a paper on how we plan to 51 what we would learn in class to our future professions and 52 .to our lives.I managed to get an A in that 53 and leaned life lessons that have served me well beyond the54 .Ten years after my chess class with Ashley, I' m still putting to use what he 55 me：“the absolute most important 56 that you learn when you play chess is how to make good 57 . On every single move you have to 58 a situation, process what your opponent (对手) is doing and 59 the best move from among all your options.” These words s till ring true today in my 60 as a journalist.41. A put forward B jumped at C tried out D turned down42. A waste B earn C save D pay43. A excited B worried C moved D tired44. A title B competitor C textbook D instructor45. A urged B demanded C held D meant46. A fastest B easiest C best D rarest47. A interview B meet C challenge D beat48. A chance B qualification C honor D job49. A real B perfect C clear D possible50. A attend B pass C skip D observe51. A add B expose C apply D compare52. A eventually B naturally C directly D normally53. A game B presentation C course D experiment54. A criterion B classroom C department D situation55. A taught B wrote C questioned D promised56. A fact B step C manner D skill57. A grades B decisions C impressions D comments58. A analyze B describe C rebuild D control59. A announce B signal C block D evaluate60. A role B desire C concern D behaviorTwo weeks earlier, my son, Ben, had got in touch. He’d moved to England with his mum when he was three and it had been 13 years since I’d __41__ seen him. So imagine my __42__ when he emailed me saying he wanted to come to visit me.I was __43__! I arrived early at Byron Bay where we were supposed to __44__. The bay was __45__ in sunshine, and there was a group of kayakers around 150m off the shore. Getting a little __46__, I realized one kayak（皮划艇）was in __47__. ＂Something’s not __48__!＂I took off my T-shirt and __49__ into the water. I saw there were two instructors on board and a man lying across the middle. He was __50__ violently. Linking arms with one of the instructors, I helped __51__ the young man out of the water. He was unconscious and as I looked at his face, something __52_ to me. Those brown eyes were very __53__. ＂What’s his name?＂I asked the instructor. ＂Ben,＂he replied, and immediately I __54__. That stranger was my son!The instructors called for an ambulance. __55__, after a brief stay in hospital, Ben was well enough to be allowed to __56__ and later the family met up for dinner. We chatted about everything and then Ben __57__ to me. ＂I just want to say thank you,＂he said. ＂You __58__ my life!＂I still can’t believe what a __59__ it was. I’m just so glad I was there __60__ to help my son.41. A. also B. often C. even D. last42. A. delight B. relief C. anger D. worry43. A. scared B. shocked C. thrilled D. ashamed44. A. talk B. stay C. meet D. settle45. A. bathed B. clean C. deep D. formed46. A. faster B. closer C. heavier D. wiser47. A. trouble B. advance C. question D. battle48. A. real B. right C. fair D. fit49. A. stared B. sank C. dived D. fell50. A. arguing B. fighting C. shouting D. shaking51. A. lead B. persuade C. carry D. keep52. A. happened B. occurred C. applied D. appealed53. A. sharp B. pleasant C. attractive D. familiar54. A. agreed B. hesitated C. doubted D. knew55. A. Fortunately B. Frankly C. Sadly D. Suddenly56. A. return B. relax C. speak D. leave57. A. joked B. turned C. listened D. pointed58. A. created B. honored C. saved D. guided59. A. coincidence B. change C. pity D. pain60. A. on board B. in time C. for sure D. on purposeWhen most of us get a text message on our cell phone from an unknown person, we usually say ＂sorry, __41__ number!＂and move on. But when Dennis Williams __42__ a text that clearly wasn’t intended for him, he did something __43__.On March 19, Dennis got a group text __44__ him that a couple he didn’t know were at the hospital, waiting for the __45__ of a baby.＂Congratulations! But I think someone was mistaken,＂Dennis __46__. The baby was born and update texts were __47__ quickly from the overjoyed grandmother, Teresa. In her __48__, she didn’t seem to realize that she was __49__ the baby’s photos with a complete stranger. ＂Well, I don’t __50__ you all but I will get there to take pictures with the baby,＂replied Dennis before asking which room the new __51__ were in.Much to the family’s surprise, Dennis stuck to his __52__! He turned up at the hospital __53__ gifts for the new mother Lindsey and her baby boy. Lindsey’s husband was totally __54__ by the unexpected visit. ＂I don’t think we would have randomly invited him over but we __55__ it and the gifts.＂Teresa __56__ a photo of the chance meeting on a social networking website __57__ by the touching words: ＂What a __58__ this young man was to our family! He was so __59__ and kind to do this.＂The post has since gained the __60__ of social media users all over the world, receiving more than 184,000 shares and 61,500 likes in just three days.41.A. unlucky B. secret C. new D. wrong42.A. received B. translated C. copied D. printed43.A. reasonable B. special C. necessary D. practical44.A. convincing B. reminding C. informing D. warning45.A. wake-up B. recovery C. growth D. arrival46.A. responded B. interrupted C. predicted D. repeated47.A. coming in B. setting out C. passing down D. moving around48.A. opinion B. anxiety C. excitement D. effort49.A. comparing B. exchanging C. discussing D. sharing50.A. accept B. know C. believe D. bother51.A. parents B. doctors C. patients D. visitors52.A. dream B. promise C. agenda D. principle53.A. bearing B. collecting C. opening D. making54.A. discouraged B. relaxed C. astonished D. defeated55.A. admit B. need C. appreciate D. expect56.A. found B. selected C. developed D. posted57.A. confirmed B. simplified C. clarified D. accompanied58 .A. pity B. blessing C. relief D. problem59.A. smart B. calm C. sweet D. fair60.A. sympathy B. attention C. control D. trustThe Homeless HeroFor many, finding an unattended wallet filled with £400 in cash would be a source（来源）of temptation（诱惑）. But the __16__ would no doubt be greater if you were living on the streets with little food and money. All of this makes the actions of the homeless Tom Smith __17__more remarkable.After spotting a __18__ on the front seat inside a parked car with its window down, he stood guard in the rain for about two hours waiting for the __19__ to return.After hours in the cold and wet, he __20___ inside and pulled the wallet out hoping to find some ID so he could contact（联系）the driver, only to __21__ it contained £400 in notes, with another £50 in spare change beside it.He then took the wallet to a nearby police station after __22__ a note behind to let the owner know it was safe. When the car’s owner John Anderson and his colleague Carol Lawrence returned to the car—which was itself worth £35, 000—in Glasgow city centre, they were __23__to find two policemen standing next to it. The policemen told them what Mr. Smith did and that the wallet was __24__.The pair were later able to thank Mr. Smith for his __25__.Mr. Anderson said: ＂I couldn’t believe that the guy never took a penny. To think he is sleeping on the streets tonight __26__ he could have stolen the money and paid for a place to stay in. This guy has nothing and __27__ he didn’t take the wallet for himself；he thought about others __28__. It’s unbelievable. It just proves there are __29__ guys out there.＂Mr. Smith’s act __30__ much of the public’s attention. He also won praise from social media users after Mr. Anderson __31__ about the act of kindness on Facebook.Now Mr. Anderson has set up an online campaign to __32__ money for Mr. Smith and other homeless people in the area, which by yesterday had received £8,000. ＂I think the faith that everyone has shown __33__ him has touched him. People have been approaching him in the street; he’s had job __34__ and all sorts,＂Mr. Anderson commented.For Mr. Smith, this is a possible life-changing __35__. The story once again tells us that one good turn deserves another.16. A. hope B. aim C. urge D. effort17. A. still B. even C. ever D. once18. A. wallet B. bag C. box D. parcel19. A. partner B. colleague C. owner D. policeman20. A. turned B. hid C. stepped D. reached21. A. discover B. collect C. check D. believe22. A. taking B. leaving C. reading D. writing23. A. satisfied B. excited C. amused D. shocked24. A. safe B. missing C. found D. seen25. A. service B. support C. kindness D. encouragement26. A. when B. if C. where D. because27. A. rather B. yet C. already D. just28. A. too B. though C. again D. instead29. A. honest B. polite C. rich D. generous30. A. gave B. paid C. cast D. drew31. A. learned B. posted C. cared D. heard32. A. borrow B. raise C. save D. earn33. A. of B. at C. for D. in34. A. details B. changes C. offers D. applications35. A. lesson B. adventure C. chance D. challengeRaynor Winn and her husband Moth became homeless due to their wrong investment. Their savings had been36 to pay lawyers’ fees. To make matters worse, Moth was diagnosed（诊断）with a37 disease. There was no 38 , only pain relief.Failing to find any other way out, they decided to make a 39 journey, as they caught sight of an old hikers’(徒步旅行者）guide.This was a long journey of unaccustomed hardship and 40 recovery. When leaving home, Raynor andMoth had just ￡320 in the bank. They planned to keep the 41 low by living on boiled noodles, with the 42 hamburger shop treat.Wild camping is 43 in England. To avoid being caught, the Winns had to get their tent up 44 and packed it away early in the morning. The Winns soon discovered that daily hiking in their 50s is a lot 45 than they remember it was in their 20s. Raynor 46 all over and desired a bath. Moth, meanwhile, after an initial 47 , found his symptoms were strangely 48 by their daily tiring journey.49 , the couple found that their bodies turned for the better, with re-found strong muscles that they thought had 50 forever. "Our hair was fried and falling out, nails broken, clothes 51 to a thread, but we were alive."During the journey, Raynor began a career as a nature writer. She writes, " 52 had taken every material thing from me and left me torn bare, an empty page at the end of a(n) 53 written book. It had also given me a 54 , either to leave that page 55 or to keep writing the story with hope. I chose hope.”36. A. drawn up B. used up C. backed up D. kept up37. A. mild B. common C. preventable D. serious38. A. cure B. luck C. care D. promise39. A. business B. walking C. bus D. rail40. A. expected B. frightening C. disappointing D. surprising41. A. budget B. revenue C. compensation D. allowance42. A. frequent B. occasional C. abundant D. constant43. A. unpopular B. lawful C. attractive D. illegal44. A. soon B. early C. late D. slowly45. A. harder B. easier C. cheaper D. funnier46. A. rolled B. bled C. ached D. trembled47. A. struggle B. progress C. excitement D. research48. A. developed B. controlled C. reduced D. increased49. A. Initially B. Eventually C. Temporarily D. Consequently50. A. gained B. kept C. wounded D. lost51. A. sewn B. washed C. worn D. ironed52. A. Doctors B. Hiking C. Lawyers D. Homelessness53. A. well B. partly C. neatly D. originally54. A. choice B. reward C. promise D. break55. A. loose B. full C. blank D. missingNo one is born a winner. People make themselves into winners by their own __16__.I learned this lesson from a(n) __17__ many years ago. I took the head __18__ job at a school in Baxley, Georgia. It was a small school with a weak football program.It was a tradition for the school’s old team to play agains t the __19__ team at the end of spring practice. The old team had no coach, and they didn’t even practice to __20__ the game. Being the coach of the new team, I was excited because I knew we were going to win, but to my disappointment we were defeated. I c ouldn’t __21__ I had got into such a situation. Thinking hard about it, I came to __22__ that my team might not be the number one team in Georgia, but they were __23__ me. I had to change my __24__about their ability and potential.I started doing anything I could to help them build a little __25__. Most important, I began to treat them like __26__. That summer, When the other teams enjoyed their __27___, we met every day and __28__passing and kicking the football.Six months after suffering our __29__on the spring practice field, we won our first game and our second, and continued to __30__. Finally, we faced the number one team in the state. I felt that it would be a __31__for us even if we lost the game. But that wasn’t what happened. My boys beat the best team in Georgia, giving me one of the greatest __32__of my life!From the experience I learnt a lot about how the attitude of the leader can __33__ the members of a team. Instead of seeing my boys as losers, I pushed and__34__them. I helped them to see themselves __35__, and they built themselves into winners.Winners are made, but born.16. A. luck B. tests C. efforts D. nature17. A. experiment B. experience C. visit D. show18. A. operating B. editing C. consulting D. coaching19. A. successful B. excellent C. strong D. new20. A. cheer for B. prepare for C. help with D. finish with21. A. believe B. agree C. describe D. regret22. A. realize B. claim C. permit D. demand23. A. reacting to B. looking for C. depending on D. caring about24. A. decision B. attitude C. conclusion D. intention25. A. pride B. culture C. fortune D. relationship26. A. leaders B. partners C. winners D. learners27. A. rewards B. vacations C. health D. honor28. A. risked B. missed C. considered D. practiced29. A. defeat B. decline C. accident D. mistake30. A. relax B. improve C. expand D. defend31. A. shame B. burden C. victory D. favor32. A. chances B. thrills C. concerns D. offers33. A. surprise B. serve C. interest D. affect34. A. encouraged B. observed C. protected D. impressed35. A. honestly B. individually C. calmly D. differentlyA young English teacher saved the lives of 30 students when he took 36 of a bus after its driver suffered a serious heart attack. Guy Harvold, 24, had 37 the students and three course leaders from Gatwick airport, and they were travelling to Bourmemouth to 38 their host families. They were going to 39 a course at the ABC Language School in Bournemouth where Harvold works as a 40 .Harvold, who has not 41 his driving test, said, “I realized the bus was out of control when I was 42 the students.”The bus ran into trees at the side of the road and he 43 the driver was slumped (倒伏) over the wheel. The driver didn’t 44 . He was unconscious. The bus45 a lamp post and it broke the glass on the front door before Harvold 46 to bring the bus toa stop. Police 47 the young teacher’s quick thinking. If he hadn’t48 quickly, there could have been a terrible 49 .The bus driver never regained consciousness and died at Easy Surrey Hospital. He had worked regularly with the 50 and was very well regarded by the teachers and students. Harvold said, “I was51 that no one else was hurt, but I hoped that the driver would 52 .The head of the language school told the local newspaper that the school is going to send Harvold on a weekend 53 to Dublin with a friend, thanking him for his 54 . A local driving school has also offered him six 55 driving lessons.36. A. control B. care C. advantage D. note37. A. taken in B. picked up C. tracked down D. helped out38. A. greet B. thank C. invite D. meet39. A. present B. introduce C. take D. organize40. A. drive B. doctor C. librarian D. teacher41. A. given B. marked C. passed D. conducted42. A. speaking to B. waiting for C. returning to D. looking for43. A. learned B. noticed C. mentioned D. doubted44. A. sleep B. cry C. move D. recover45. A. ran over B. went by C. carried D. hit46. A. remembered B. continued C. prepared D. managed47. A. witnessed B. recorded C. praised D. understood48. A. appeared B. reacted C. escaped D. interrupted49. A. delay B. accident C. mistake D. experience50. A. airport B. hospital C. school D. police51. A. happy B. fortunate C. touched D. sorry52. A. survive B. retire C. relax D. succeed53. A. project B. trip C. dinner D. duty54. A. bravery B. skill C. quality D. knowledge55. A. necessary B. easy C. different D. freeWe have all heard how time is more valuable than money, but is it __36__ to have too much?I__37__ back in high school I spent most of my day at school since I also __38__a team sport. By the time I got home, I only had a few hours to do my homework, and I had to do it __39__.When I got into college, things __40__. I suddenly found myself out of class before noon time. Because of all this __41__ there was no sense of __42__ to do my school work immediately.I was performing this action of waiting until it later became__43__.Once that happened, I just kept__44__my studying further and further back in my day. Then I got to the point where I was__45__really late at night to get my work alone.One day I __46__a former classmate of mine who was __47__ a lot of money running a sideline(副业).Since his regular job was __48__,I asked him why he just didn't do his sideline full-time. He said without the job, he would __49__ have too much time and would just do what I did back in__50__.He said that if he __51__the job, he would lose his __52__ to work and succeed.So, try __53__your tine with other work. This is why there is a __54__ that if you want something done, ask a __55__person to do it.36.A. true B. fair C. strange D. possible37.A. remember B. admit C. understand D. expect38.A. watched B. loved. C. Coached D. played39.A. al last B. right away C. of course D. mattered40.A. happened B. repeated C. changed D. mattered41.A. extra B. difficult C. valuable D. limited42.A. duty B. achievement C. urgency D. direction43.A. burden B. relief C. risk D. habit44.A. pushing B. taking C. setting D. calling45.A. hanging out B. staying up C. jogging round D. showing off46.A. met B. helped C. treated D. hired47.A. raising B. wasting C. demanding D. making48.A. safe B. important C. boring D. rewarding49.A. luckily B. hardly C. hopefully D. simply50.A. childhood B. college C. town D. business51.A. quit B. found C. accepted D. kept52.A. heart B. chance C. drive D. way53.A. saving B. filling up C. giving up D. trading54.A. message B. story C. saying D. fact55.A. careful B. busy C. reliable D. kind2018新课标I卷BCADD CBDCB CACBA DBADA 2018新课标II卷DACCA BABCD CBDDA DBCAB 2018新课标III卷 DABDC AACDB ABACC DDBCB 2018北京卷CBACD ABDAC ABDAD BBDCC 2018江苏卷BDABD ABDCA CACBD CDBAC 2018天津卷CBDDB AACBA CBDAB CBDAD 2017.11浙江卷ABDCD CABCD DCBBC AABAD 2018浙江卷DADBC ACDAB ADCDB ACBCB。

During my second year at the city college, I was told that the education department was offering a “free” course, called Thinking Chess, for three credits. I41 the idea of taking the class because, after all, who doesn’t want to42 a few dollars? More than that, I’d always wanted to learn chess. And, even if I weren’t43 enough about free credits, news about our 44 was appealing enough to me. He was an international grand master, which 45 I would be learning from one of the game’s46 I could hardly wait to 47 him.Maurice Ashley was kind and smart, a former graduate returning to teach, and this 48 was no game for him; he meant business. In his introduction, he made it 49 that our credits would be hard-earned. In order to 50 the class among other criteria, we had to write a paper on how we plan to 51 what we would learn in class to our future professions and 52 .to our lives.I managed to get an A in that 53 and leaned life lessons that have served me well beyond the54 .Ten years after my chess class with Ashley, I' m still putting to use what he 55 me：“the absolute most important 56 that you learn when you play chess is how to make good 57 . On every single move you have to 58 a situation, process what your opponent (对手) is doing and 59 the best move from among all your options.” These words s till ring true today in my 60 as a journalist.41. A put forward B jumped at C tried out D turned down42. A waste B earn C save D pay43. A excited B worried C moved D tired44. A title B competitor C textbook D instructor45. A urged B demanded C held D meant46. A fastest B easiest C best D rarest47. A interview B meet C challenge D beat48. A chance B qualification C honor D job49. A real B perfect C clear D possible50. A attend B pass C skip D observe51. A add B expose C apply D compare52. A eventually B naturally C directly D normally53. A game B presentation C course D experiment54. A criterion B classroom C department D situation55. A taught B wrote C questioned D promised56. A fact B step C manner D skill57. A grades B decisions C impressions D comments58. A analyze B describe C rebuild D control59. A announce B signal C block D evaluate60. A role B desire C concern D behaviorTwo weeks earlier, my son, Ben, had got in touch. He’d moved to England with his mum when he was three and it had been 13 years since I’d __41__ seen him. So imagine my __42__ when he emailed me saying he wanted to come to visit me.I was __43__! I arrived early at Byron Bay where we were supposed to __44__. The bay was __45__ in sunshine, and there was a group of kayakers around 150m off the shore. Getting a little __46__, I realized one kayak（皮划艇）was in __47__. ＂Something’s not __48__!＂I took off my T-shirt and __49__ into the water. I saw there were two instructors on board and a man lying across the middle. He was __50__ violently. Linking arms with one of the instructors, I helped __51__ the young man out of the water. He was unconscious and as I looked at his face, something __52_ to me. Those brown eyes were very __53__. ＂What’s his name?＂I asked the instructor. ＂Ben,＂he replied, and immediately I __54__. That stranger was my son!The instructors called for an ambulance. __55__, after a brief stay in hospital, Ben was well enough to be allowed to __56__ and later the family met up for dinner. We chatted about everything and then Ben __57__ to me. ＂I just want to say thank you,＂he said. ＂You __58__ my life!＂I still can’t believe what a __59__ it was. I’m just so glad I was there __60__ to help my son.41. A. also B. often C. even D. last42. A. delight B. relief C. anger D. worry43. A. scared B. shocked C. thrilled D. ashamed44. A. talk B. stay C. meet D. settle45. A. bathed B. clean C. deep D. formed46. A. faster B. closer C. heavier D. wiser47. A. trouble B. advance C. question D. battle48. A. real B. right C. fair D. fit49. A. stared B. sank C. dived D. fell50. A. arguing B. fighting C. shouting D. shaking51. A. lead B. persuade C. carry D. keep52. A. happened B. occurred C. applied D. appealed53. A. sharp B. pleasant C. attractive D. familiar54. A. agreed B. hesitated C. doubted D. knew55. A. Fortunately B. Frankly C. Sadly D. Suddenly56. A. return B. relax C. speak D. leave57. A. joked B. turned C. listened D. pointed58. A. created B. honored C. saved D. guided59. A. coincidence B. change C. pity D. pain60. A. on board B. in time C. for sure D. on purposeWhen most of us get a text message on our cell phone from an unknown person, we usually say ＂sorry, __41__ number!＂and move on. But when Dennis Williams __42__ a text that clearly wasn’t intended for him, he did something __43__.On March 19, Dennis got a group text __44__ him that a couple he didn’t know were at the hospital, waiting for the __45__ of a baby.＂Congratulations! But I think someone was mistaken,＂Dennis __46__. The baby was born and update texts were __47__ quickly from the overjoyed grandmother, Teresa. In her __48__, she didn’t seem to realize that she was __49__ the baby’s photos with a complete stranger. ＂Well, I don’t __50__ you all but I will get there to take pictures with the baby,＂replied Dennis before asking which room the new __51__ were in.Much to the family’s surprise, Dennis stuck to his __52__! He turned up at the hospital __53__ gifts for the new mother Lindsey and her baby boy. Lindsey’s husband was totally __54__ by the unexpected visit. ＂I don’t think we would have randomly invited him over but we __55__ it and the gifts.＂Teresa __56__ a photo of the chance meeting on a social networking website __57__ by the touching words: ＂What a __58__ this young man was to our family! He was so __59__ and kind to do this.＂The post has since gained the __60__ of social media users all over the world, receiving more than 184,000 shares and 61,500 likes in just three days.41.A. unlucky B. secret C. new D. wrong42.A. received B. translated C. copied D. printed43.A. reasonable B. special C. necessary D. practical44.A. convincing B. reminding C. informing D. warning45.A. wake-up B. recovery C. growth D. arrival46.A. responded B. interrupted C. predicted D. repeated47.A. coming in B. setting out C. passing down D. moving around48.A. opinion B. anxiety C. excitement D. effort49.A. comparing B. exchanging C. discussing D. sharing50.A. accept B. know C. believe D. bother51.A. parents B. doctors C. patients D. visitors52.A. dream B. promise C. agenda D. principle53.A. bearing B. collecting C. opening D. making54.A. discouraged B. relaxed C. astonished D. defeated55.A. admit B. need C. appreciate D. expect56.A. found B. selected C. developed D. posted57.A. confirmed B. simplified C. clarified D. accompanied58 .A. pity B. blessing C. relief D. problem59.A. smart B. calm C. sweet D. fair60.A. sympathy B. attention C. control D. trustThe Homeless HeroFor many, finding an unattended wallet filled with £400 in cash would be a source（来源）of temptation（诱惑）. But the __16__ would no doubt be greater if you were living on the streets with little food and money. All of this makes the actions of the homeless Tom Smith __17__more remarkable.After spotting a __18__ on the front seat inside a parked car with its window down, he stood guard in the rain for about two hours waiting for the __19__ to return.After hours in the cold and wet, he __20___ inside and pulled the wallet out hoping to find some ID so he could contact（联系）the driver, only to __21__ it contained £400 in notes, with another £50 in spare change beside it.He then took the wallet to a nearby police station after __22__ a note behind to let the owner know it was safe. When the car’s owner John Anderson and his colleague Carol Lawrence returned to the car—which was itself worth £35, 000—in Glasgow city centre, they were __23__to find two policemen standing next to it. The policemen told them what Mr. Smith did and that the wallet was __24__.The pair were later able to thank Mr. Smith for his __25__.Mr. Anderson said: ＂I couldn’t believe that the guy never took a penny. To think he is sleeping on the streets tonight __26__ he could have stolen the money and paid for a place to stay in. This guy has nothing and __27__ he didn’t take the wallet for himself；he thought about others __28__. It’s unbelievable. It just proves there are __29__ guys out there.＂Mr. Smith’s act __30__ much of the public’s attention. He also won praise from social media users after Mr. Anderson __31__ about the act of kindness on Facebook.Now Mr. Anderson has set up an online campaign to __32__ money for Mr. Smith and other homeless people in the area, which by yesterday had received £8,000. ＂I think the faith that everyone has shown __33__ him has touched him. People have been approaching him in the street; he’s had job __34__ and all sorts,＂Mr. Anderson commented.For Mr. Smith, this is a possible life-changing __35__. The story once again tells us that one good turn deserves another.16. A. hope B. aim C. urge D. effort17. A. still B. even C. ever D. once18. A. wallet B. bag C. box D. parcel19. A. partner B. colleague C. owner D. policeman20. A. turned B. hid C. stepped D. reached21. A. discover B. collect C. check D. believe22. A. taking B. leaving C. reading D. writing23. A. satisfied B. excited C. amused D. shocked24. A. safe B. missing C. found D. seen25. A. service B. support C. kindness D. encouragement26. A. when B. if C. where D. because27. A. rather B. yet C. already D. just28. A. too B. though C. again D. instead29. A. honest B. polite C. rich D. generous30. A. gave B. paid C. cast D. drew31. A. learned B. posted C. cared D. heard32. A. borrow B. raise C. save D. earn33. A. of B. at C. for D. in34. A. details B. changes C. offers D. applications35. A. lesson B. adventure C. chance D. challengeRaynor Winn and her husband Moth became homeless due to their wrong investment. Their savings had been36 to pay lawyers’ fees. To make matters worse, Moth was diagnosed（诊断）with a37 disease. There was no 38 , only pain relief.Failing to find any other way out, they decided to make a 39 journey, as they caught sight of an old hikers’(徒步旅行者）guide.This was a long journey of unaccustomed hardship and 40 recovery. When leaving home, Raynor andMoth had just ￡320 in the bank. They planned to keep the 41 low by living on boiled noodles, with the 42 hamburger shop treat.Wild camping is 43 in England. To avoid being caught, the Winns had to get their tent up 44 and packed it away early in the morning. The Winns soon discovered that daily hiking in their 50s is a lot 45 than they remember it was in their 20s. Raynor 46 all over and desired a bath. Moth, meanwhile, after an initial 47 , found his symptoms were strangely 48 by their daily tiring journey.49 , the couple found that their bodies turned for the better, with re-found strong muscles that they thought had 50 forever. "Our hair was fried and falling out, nails broken, clothes 51 to a thread, but we were alive."During the journey, Raynor began a career as a nature writer. She writes, " 52 had taken every material thing from me and left me torn bare, an empty page at the end of a(n) 53 written book. It had also given me a 54 , either to leave that page 55 or to keep writing the story with hope. I chose hope.”36. A. drawn up B. used up C. backed up D. kept up37. A. mild B. common C. preventable D. serious38. A. cure B. luck C. care D. promise39. A. business B. walking C. bus D. rail40. A. expected B. frightening C. disappointing D. surprising41. A. budget B. revenue C. compensation D. allowance42. A. frequent B. occasional C. abundant D. constant43. A. unpopular B. lawful C. attractive D. illegal44. A. soon B. early C. late D. slowly45. A. harder B. easier C. cheaper D. funnier46. A. rolled B. bled C. ached D. trembled47. A. struggle B. progress C. excitement D. research48. A. developed B. controlled C. reduced D. increased49. A. Initially B. Eventually C. Temporarily D. Consequently50. A. gained B. kept C. wounded D. lost51. A. sewn B. washed C. worn D. ironed52. A. Doctors B. Hiking C. Lawyers D. Homelessness53. A. well B. partly C. neatly D. originally54. A. choice B. reward C. promise D. break55. A. loose B. full C. blank D. missingNo one is born a winner. People make themselves into winners by their own __16__.I learned this lesson from a(n) __17__ many years ago. I took the head __18__ job at a school in Baxley, Georgia. It was a small school with a weak football program.It was a tradition for the school’s old team to play agains t the __19__ team at the end of spring practice. The old team had no coach, and they didn’t even practice to __20__ the game. Being the coach of the new team, I was excited because I knew we were going to win, but to my disappointment we were defeated. I c ouldn’t __21__ I had got into such a situation. Thinking hard about it, I came to __22__ that my team might not be the number one team in Georgia, but they were __23__ me. I had to change my __24__about their ability and potential.I started doing anything I could to help them build a little __25__. Most important, I began to treat them like __26__. That summer, When the other teams enjoyed their __27___, we met every day and __28__passing and kicking the football.Six months after suffering our __29__on the spring practice field, we won our first game and our second, and continued to __30__. Finally, we faced the number one team in the state. I felt that it would be a __31__for us even if we lost the game. But that wasn’t what happened. My boys beat the best team in Georgia, giving me one of the greatest __32__of my life!From the experience I learnt a lot about how the attitude of the leader can __33__ the members of a team. Instead of seeing my boys as losers, I pushed and__34__them. I helped them to see themselves __35__, and they built themselves into winners.Winners are made, but born.16. A. luck B. tests C. efforts D. nature17. A. experiment B. experience C. visit D. show18. A. operating B. editing C. consulting D. coaching19. A. successful B. excellent C. strong D. new20. A. cheer for B. prepare for C. help with D. finish with21. A. believe B. agree C. describe D. regret22. A. realize B. claim C. permit D. demand23. A. reacting to B. looking for C. depending on D. caring about24. A. decision B. attitude C. conclusion D. intention25. A. pride B. culture C. fortune D. relationship26. A. leaders B. partners C. winners D. learners27. A. rewards B. vacations C. health D. honor28. A. risked B. missed C. considered D. practiced29. A. defeat B. decline C. accident D. mistake30. A. relax B. improve C. expand D. defend31. A. shame B. burden C. victory D. favor32. A. chances B. thrills C. concerns D. offers33. A. surprise B. serve C. interest D. affect34. A. encouraged B. observed C. protected D. impressed35. A. honestly B. individually C. calmly D. differentlyA young English teacher saved the lives of 30 students when he took 36 of a bus after its driver suffered a serious heart attack. Guy Harvold, 24, had 37 the students and three course leaders from Gatwick airport, and they were travelling to Bourmemouth to 38 their host families. They were going to 39 a course at the ABC Language School in Bournemouth where Harvold works as a 40 .Harvold, who has not 41 his driving test, said, “I realized the bus was out of control when I was 42 the students.”The bus ran into trees at the side of the road and he 43 the driver was slumped (倒伏) over the wheel. The driver didn’t 44 . He was unconscious. The bus45 a lamp post and it broke the glass on the front door before Harvold 46 to bring the bus toa stop. Police 47 the young teacher’s quick thinking. If he hadn’t48 quickly, there could have been a terrible 49 .The bus driver never regained consciousness and died at Easy Surrey Hospital. He had worked regularly with the 50 and was very well regarded by the teachers and students. Harvold said, “I was51 that no one else was hurt, but I hoped that the driver would 52 .The head of the language school told the local newspaper that the school is going to send Harvold on a weekend 53 to Dublin with a friend, thanking him for his 54 . A local driving school has also offered him six 55 driving lessons.36. A. control B. care C. advantage D. note37. A. taken in B. picked up C. tracked down D. helped out38. A. greet B. thank C. invite D. meet39. A. present B. introduce C. take D. organize40. A. drive B. doctor C. librarian D. teacher41. A. given B. marked C. passed D. conducted42. A. speaking to B. waiting for C. returning to D. looking for43. A. learned B. noticed C. mentioned D. doubted44. A. sleep B. cry C. move D. recover45. A. ran over B. went by C. carried D. hit46. A. remembered B. continued C. prepared D. managed47. A. witnessed B. recorded C. praised D. understood48. A. appeared B. reacted C. escaped D. interrupted49. A. delay B. accident C. mistake D. experience50. A. airport B. hospital C. school D. police51. A. happy B. fortunate C. touched D. sorry52. A. survive B. retire C. relax D. succeed53. A. project B. trip C. dinner D. duty54. A. bravery B. skill C. quality D. knowledge55. A. necessary B. easy C. different D. freeWe have all heard how time is more valuable than money, but is it __36__ to have too much?I__37__ back in high school I spent most of my day at school since I also __38__a team sport. By the time I got home, I only had a few hours to do my homework, and I had to do it __39__.When I got into college, things __40__. I suddenly found myself out of class before noon time. Because of all this __41__ there was no sense of __42__ to do my school work immediately.I was performing this action of waiting until it later became__43__.Once that happened, I just kept__44__my studying further and further back in my day. Then I got to the point where I was__45__really late at night to get my work alone.One day I __46__a former classmate of mine who was __47__ a lot of money running a sideline(副业).Since his regular job was __48__,I asked him why he just didn't do his sideline full-time. He said without the job, he would __49__ have too much time and would just do what I did back in__50__.He said that if he __51__the job, he would lose his __52__ to work and succeed.So, try __53__your tine with other work. This is why there is a __54__ that if you want something done, ask a __55__person to do it.36.A. true B. fair C. strange D. possible37.A. remember B. admit C. understand D. expect38.A. watched B. loved. C. Coached D. played39.A. al last B. right away C. of course D. mattered40.A. happened B. repeated C. changed D. mattered41.A. extra B. difficult C. valuable D. limited42.A. duty B. achievement C. urgency D. direction43.A. burden B. relief C. risk D. habit44.A. pushing B. taking C. setting D. calling45.A. hanging out B. staying up C. jogging round D. showing off46.A. met B. helped C. treated D. hired47.A. raising B. wasting C. demanding D. making48.A. safe B. important C. boring D. rewarding49.A. luckily B. hardly C. hopefully D. simply50.A. childhood B. college C. town D. business51.A. quit B. found C. accepted D. kept52.A. heart B. chance C. drive D. way53.A. saving B. filling up C. giving up D. trading54.A. message B. story C. saying D. fact55.A. careful B. busy C. reliable D. kind2018新课标I卷BCADD CBDCB CACBA DBADA 2018新课标II卷DACCA BABCD CBDDA DBCAB 2018新课标III卷 DABDC AACDB ABACC DDBCB 2018北京卷CBACD ABDAC ABDAD BBDCC 2018江苏卷BDABD ABDCA CACBD CDBAC 2018天津卷CBDDB AACBA CBDAB CBDAD 2017.11浙江卷ABDCD CABCD DCBBC AABAD 2018浙江卷DADBC ACDAB ADCDB ACBCB。

2021年中考语文试题分类汇编〔130套〕专题二十四?材料作文1．〔2021·重庆市綦江县，24，50分〕仔细阅读下面的文字，结合材料内容，联系生活实际，自拟题目，写一篇文章。

全品中考网友情，是患难中的倾情相助，是迷途上的逆耳忠言，是跌倒时一把真诚的搀扶，是痛苦时抹去泪水的一缕春风友情是人生一笔受益匪浅的储蓄，但不可以单向支取，只有通过彼此的积累才能加重其分量。

任何带功利性的友情，不仅得不到利息，而且连本钱都会丧失殆尽。

懂得珍惜友情，就是珍惜人生中那份最珍贵的财富；懂得珍惜友情，实在是一种智慧与幸运。

全品中考网要求：①内容具体，有真情实感；②除诗歌外，文体不限；③不少于500字；④凡涉及真实的人名、校名、地名，一律用A、B、C等英文大写字母代替。

2．〔2021·武汉市，24，50分〕阅读下面材料，按要求作文。

〔5 0分〕花园里的小橡树愁容满面，看到别人在开花结果，它不知道自己该做什么。

全品中考网苹果树说：“你为什么不能结出一个美味的苹果呢？你太不努力了！〞玫瑰也对它说：“别听它的，你应该开出一朵玫瑰花，你看多容易！〞小橡树非常努力，可是既未结出美味的苹果，也未开出漂亮的玫瑰花，它越来越迷茫。

迷茫中，小橡树尝试让自己平静下来，去倾听自己内心的声音：我是一棵橡树啊，我永远结不出苹果，也开不出玫瑰花。

我的使命应该是长得高大挺拔，给鸟儿栖息，给游人遮阴。

全品中考网小橡树顿觉浑身充满力量，它快乐地生长着，很快就成为一棵大橡树。

成长过程中我们需要些什么呢？小橡树的经历应该能引发你一些思考。

请自拟题目，自选文体〔诗歌、戏剧除外〕，写一篇不少于600字的文章。

文中不要出现自己的姓名和校名。

3．〔2021·四川省乐山市，24，60分〕材料作文。

〔阅读以下材料，然后自拟题目作文。

不少于600字。

60分〕全品中考网山里有个男孩长大了，他要到外面的世界去，山里到山外没有路，他也没有钱，有的只是茫茫的大山，茂密的森林。

解答: 13，设等比数列公比为q3、25•- (ag )ag••• q 3• S 121 …S 53（1）证明:a nb n 是等比数列，a n b n 是等差数列;(2 )求a n 和b n 的通项公式. 答案： (1) 见解析 1 x n 11 x n 1(2)a n () n，b n () n2222解析：(1)将 4a n 1 3a n b n 4 , 4b n 1 3b n a n 4 相加可得 4a n1 4b n 1 3a n 3b n a n b n ,11 整理可得a n 1 b n 1丄(a n b n )，又玄1 Q 1，故a . b n 是首项为1,公比为1的等比数列22将 4a n 1 3a n b n 4, 4b n 13b n a n 4 作差可得 4a n14b n13a n 3b n a . b n 8,整理可得a n 1 b n 1a nb n 2，又a 1 Q 1，故a .b n 是首项为1，公差为2的等差数列1 1A. a n 2n 5B.3n 3n 10 CS2n 28nD.S n■In 2 2n 2答案：A解析：S 4 4冃 6d 0a 1 3 5, S n2依题意有 可得 a nn 4n .3S 31 4d 5 d 2 n（2019全国1理）9•记S n 为等差数列 a n 的前n 项和•已知S 40 , a 5 5，则（2（2019全国1理）14.记S n 为等比数列 a n 的前 n 项和,a 436，则 S5答案: S 51213 2019全国2理)19.已知数列a n 和b n满足a 10 , 4a n 1 3a n b n 4, 4b n 1 3b n a n 4.-31 2 3436(2)由a n b n是首项为1 ,公比为?的等比数列可得a n b n ()"①；由a n bn 是首项为1公差为2的等差数列可得a n b n 2n 1②;【解析】 【分析】首先确定公差，然后由通项公式可得 a 5的值，进一步研究数列中正项 ？负项的变化规律,得到和的最小值.【详解】等差数列 a n 中，8s 5a 3 10,得a 3 2& 3,公差da 3 a ?1, a§% 2d 0,由等差数列a n 的性质得n 5时，a n 0, n 6时，a n 大于0,所以S n 的最小值为S 4或S 5,即为10.①②相加化简得a n（!）n n 1，①②相减化简得b n 2 2（2019全国3理）5.已知各项均为正数的等比数列的前4项和为15，且a s 3a 3 4印，则a ?（）A. 16B. 8 答案： C解答：C. 4D.设该等比数列的首项 a i ，公比由已知得,4a©3dq 24a i ， 因为a 0且q 0， 则可解得2，又因为 a i (1q 3) 15,即可解得c 1，则4.（2019全国3理）14.记S n 为等差数列 a n 的前n 项和，若q0, a 2 3a ，则 3°S 5答案:4解析:设该等差数列的公差为d 2a 1 a 1 0,d 0 ,10 a 1 a 10S 0____________2S 55 a 1 a 522 2a 1 9d3 4.2a 1 4d 5d（2019北京理）10.设等差数列 的前n 项和为S n,若a 2=-3 ,S s =-10，则a s = ,S n 的最小值为【答案】 (1). 0. (2). -10.【点睛】本题考查等差数列的通项公式？求和公式？等差数列的性质，难度不大，注重重要知识？基础知识？基本运算能力的考查a i (2019北京理)20.已知数列｛a n｝，从中选取第i1项、第i2项、…、第i m项(i l<i2<・・Vm)，若a h a2则称新数列a h, a i2, , a m为｛a n｝的长度为m的递增子列•规定：数列｛a n｝的任意一项都是｛a n｝的长度为1的递增子列．(I)写出数列1 , 8, 3, 7, 5, 6, 9的一个长度为4的递增子列；(H)已知数列｛a n｝的长度为p的递增子列的末项的最小值为a m o，长度为q的递增子列的末项的最小值为a n0.若p<q,求证：a m°<a n°；(川)设无穷数列｛a n｝的各项均为正整数，且任意两项均不相等若｛ a n｝的长度为s的递增子列末项的最小值为2s -, 且长度为S末项为2s-1的递增子列恰有2s-1个(s=1 , 2,…)，求数列｛a n｝的通项公式.【答案】(I )1,3,5,6.(n )见解析; (川)见解析.【解析】【分析】(I )由题意结合新定义的知识给出一个满足题意的递增子列即可；(n )利用数列的性质和递增子列的定义证明题中的结论即可；(川)观察所要求解数列的特征给出一个满足题意的通项公式，然后证明通项公式满足题中所有的条件即可•【详解】(I )满足题意的一个长度为4的递增子列为：1,3,5,6.(n)对于每一个长度为q的递增子列a n a2丄a q，都能从其中找到若干个长度为p的递增子列色总丄a p，此时a p a q ，设所有长度为q的子列的末项分别为：a q, ,a q2,a q3 ,L ,所有长度为p的子列的末项分别为：a p1,a p2,a p3,L ,则a n0 min a q1,a q2,a q3,L ，注意到长度为P的子列可能无法进一步找到长度为q的子列，故a m0 min a p1,a p2,a p3,L ，据此可得：a m0a n0n 1, n为偶数(川)满足题意的一个数列的通项公式可以是a n 斗才来朴2,1,4,3,6,5,8,7,L ,n 1,n为奇数面说明此数列满足题意很明显数列为无穷数列，且各项均为正整数，任意两项均不相等.长度为s 的递增子列末项的最小值为2s-1，下面用数学归纳法证明长度为s 末项为2s-1 的递增子列恰有2s 1个s 1,2,L ：当n 1 时命题显然成立，假设当n k时命题成立，即长度为k末项为2k-1的递增子列恰有21个，则当n k 1时，对于n k 时得到的每一个子列a s1,a s2,L ,a s k 1,2k 1，可构造：aq,a s2丄，a s「2k 1,2 k 1 1和a5^,a S2,L ,a^l,2k,2 k 1 1两个满足题意的递增子列，则长度为k+1 末项为2k+1 的递增子列恰有 2 2k 12k2k 1 1个，n 1, n为偶数综上可得，数列a n、，卄沁.2,1,4,3,6,5,8,7,L是一个满足题意的数列的通项公式•n 1, n为奇数注：当s 3时，所有满足题意的数列为：2,3,5 , 1,3,5 , 2,4,5 , 1,4,5 ，当s 4 时，数列2,3,5 对应的两个递增子列为：2,3,5,7 和2,3,6,7 .【点睛】“新定义”主要是指即时定义新概念、新公式、新定理、新法则、新运算五种，然后根据此新定义去解决问题，有时还需要用类比的方法去理解新的定义，这样有助于对新定义的透彻理解.但是，透过现象看本质，它们考查的还是基础数学知识，所以说“新题”不一定是“难题”，掌握好三基，以不变应万变才是制胜法宝.2019天津理) 19.设a n 是等差数列，b n 是等比数列.已知a1 4,b1 6，b2 2a2 2,b3 2a3 4.(I)求a n和b n的通项公式;（n）设数列q满足G 1,c n X 2 J 2「其中k Nn 1 n b k,n 2k ,i )求数列a2n c2n1 的通项公式;2nii ）求a i c i n Ni1答案】（I ）a n 3n 1 ; b n 3 2n（n ）（i ）a2n c2n 1 9 4n1 （ii ）* 2n 1n 1 *aqnN 27 25 2 n 12 nNi 1【解析】 【分析】(I )由题意首先求得公比和公差，然后确定数列的通项公式即可; (n )结合(I )中的结论可得数列a 2n c 2n 1的通项公式，结合所得的通项公式对所求的数列通项公式进行等2n价变形，结合等比数列前n 项和公式可得aG 的值.i 12 4 d 26 2d，解得2 4 2d 4 12 4d故a n 4 (n 1) 33n1 ,b n6 2n13 2n.所以,a n的通项公式为 a n 3n 1 , b n的通项公式为b n3 2n (n )( i ) a 2n C 2n 1 a ?n b n 1 3 2n 1 3 2n 19 4n 1所以,数列 a ?n c?n1 的通 项公式 :为a2nc 2n 19 4n 12n 2n2n2n(ii )a &a i a C i 1a ia c 2i1i 1i 1i 1i 12n 2n 1n2 n4-39 412i 14 1 4n3 ?2 n5 2n 19n1 427 _2n•1J 112N*25 2n n【点睛】本题主要考查等差数列 ？等比数列的通项公式及其前 n 项和公式等基础知识.考查化归与转化思想和数列 求和的基本方法以及运算求解能力.【详解】(I )设等差数列a n 的公db n 的公比为q .依题意得6q6q 2（2019上海）18•已知数列｛a n ｝ , a 1 3，前n 项和为S n •（1）若｛an ｝为等差数列,且 a 4 15, 求S n ；（2）若｛a n ｝为等比数列,且 lim n S n 12，求公比 q 的取值范围 【解答】解：（1） Q a 4 a 3d 3 3d 15 ,d 4 ,n(n 1),S n 3n4 2n 2 n；2lim S n 存在，nlim 3(^ 2 ,n1 q 1 q3 4公比q 的取值范围为（1 , 0） （0 , 3）.42综上，d -或者d3Hm S n存在， lim S n n （2019上海）21.已知等差数列｛务｝的公差d (0， ］，数列｛b n ｝满足 b n sin (a n )，集合 S x|xb n ,n2 、（1 ）若a 1 0,d 一，求集合 30,d —,3｛乜，0, △.2 2根据三角函数线，①等差数列 ｛a n ｝的终边落在y 轴的正负半轴上时，集合S 恰好有两个元素，此时此时d —,3（2）若a 1，求d 使得集合 2 S 恰好有两个（3）若集合S 恰好有三个元素: b n T b n , T 是不超过7的正整数，求 T 的所有可能的值.【解答】解：（1） Q 等差数列｛a n ｝的公差d (0，］，数列｛b n ｝满足 b n sin (a n )，集合 S x|xb n ,n当a 1集合S (2) Q，数列｛b n ｝满足 b n sin (a .),2集合S x|x N *恰好有两个元素，如图:②a 1终边落在OA 上，要使得集合 S 恰好有两个元素，可以使 a 2, a 3的终边关于y 轴对称，如图OB , OC ,(3)①当T 3 时，b n 3 b n，集合S {bl，b2, b3},符合题意.②当T 4 时，b n 4 b n ，sin(a n 4d) sina. a n 4d a n 2k ，或者a n 4d 2k a n ，4d a n 2k，又k 1，2当k1时满足条件，此时S {，1, 1}.③当T 5时，b n 5b n，si n(a n5d)sina n，故k1，2.当k1时，S{sin—，1，sin}满足题意1010④当T 6时，b n 6b n，sin (an6d)sina n，a na n等差数列{a n}的公差d (0，］，故a n5d a n 2k ，或者a n 5d 2k a n，因为 d (0 ,所以6d a n 2k 或者a n 6d 2k a n，d (0，1 , 2, 3.1时，S {-^O, —3}，满足题意.2 2⑤当T 7 时，b n 7 b n，si n(a n 7d) si na n si na n，所以a n 7d a n 2k ，或者a n 7d 2k a n，d (0，故k 1 , 2, 31时，因为b i ~b7对应着3个正弦值，故必有一个正弦值对应着3个点，必然有a m a n 2 ，d m 7，不符合条件.k 2时，因为b i~b7对应着3个正弦值，故必有一个正弦值对应着3个点，必然有a m a n 2 ，d n不是整数，不符合条件.k 3时，因为bi ~ b7对应着3 个正弦值，故必有一个正弦值对应着3个点，必然有a m a n—，或者d7—，此时，m n均不是整数，不符合题意.7综上，T3，4，5，6.(2019江苏)8.已知数列{a n}( n N*)是等差数列，S n是其前n项和若a2^ 兎0,S9 27 ,则Q的值是 _____________________ 【答案】16【解析】【分析】由题意首先求得首项和公差，然后求解前8项和即可.a 2a 5CBa 1 d a-i 4d7d 0【详解】由题意可得：9 8S99a 1 9 8d227解得： a 1 51 ，则 S 8 8a 1 8 7d40 28 216.d 22【点睛】等差数列、等比数列的基本计算问题，是高考必考内容，解题过程中要注意应用函数方程思想，灵活应 用通项公式、求和公式等，构建方程(组)，如本题，从已知出发，构建a 1, d 的方程组.(2019江苏)20.定义首项为1且公比为正数的等比数列为“M—数列”.(1)已知等比数列｛a n ｝满足：a ?a 4 a 5,a 3 4a ? 4印 0 ,求证：数列｛a n ｝为“M—数列”；u . 1 2 2(2)已知数列｛b n ｝满足：b 1 1,S b b ，其中S 为数列｛b n ｝的前n 项和.S n b n b n 1① 求数列｛b n ｝的通项公式；② 设m 为正整数，若存在 “M—数列” ｛｝ (n € N *)，对任意正整数k ，当k 呦 时，都有C k b k q 1成立，求m 的 最大值.【答案】(1)见解析； (2［① b n = n n N * :② 5. 【解析】 【分析】(1 )由题意分别求得数列的首项和公比即可证得题中的结论； (2)①由题意利用递推关系式讨论可得数列｛b n ｝是等差数列，据此即可确定其通项公式；②由①确定b k 的值，将原问题进行等价转化，构造函数，结合导函数研究函数的性质即可求得【详解】(1)设等比数列｛a n ｝的公比为q ,所以a 1^0, q 丰0.因此数列｛a n ｝为M —数列”1 22 (2) ①因S n—，所以b nb nbn11 2 2由b| 1,S 1th 得1 1 ，则 b 22.1由2 2 得 S nb n b n 1m 的最大值.a 2&4 a s由a 3 4a ： 4ci|。

(word版)物理电学实验高考真题汇编(含答案),文档电学实验1．【2021·天津卷】某探究性学习小组利用如下图的电路测量电池的电动势和内阻。

其中电流表A1的内阻r1k ，Ω电阻R1k，Ω为了方便读数和作图，给电池串联一个R0Ω的电阻。

①按图示电路进行连接后，发现aa、bb和cc三条导线中，混进了一条内部断开的导线。

为了确定哪一条导线内部是断开的，将电建S闭合，用多用电表的电压挡先测量a、b间电压，读数不为零，再测量、a间电压，假设读数不为零，那么一定是________导线断开；假设读数为零，那么一定是___________导线断开。

②排除故障后，该小组顺利完成实验。

通过屡次改变滑动变阻器触头位置，得到电流表A 1和A2的多组I、I数据，作出图象如右图。

由I–I图象得到电池的电动势E=_________V，1212内阻r=__________Ω。

【答案】①aa bb②〔均可〕〔均可〕【考点定位】实验——用伏安法测干电池的电动势和内阻【名师点睛】由图象法处理实验数据的关键是要理解图线的物理意义——纵轴截距和斜率表示什么，闭合电路的欧姆定律是核心。

2．【2021·新课标Ⅰ卷】〔10分〕某同学研究小灯泡的伏安特性，所使用的器材有：小灯泡L〔额定电压V，额定电流(word版)物理电学实验高考真题汇编(含答案),文档〕；电压表V〔量程3V ，内阻3kΩ〕；电流表A〔量程A，内阻Ω〕；固定电阻A d V dR0〔阻值1000〕Ω；滑动变阻器R〔阻值〕Ω；电源E〔电动势5V，内阻不计〕；开关S；导线假设干。

（1〕实验要求能够实现在V的范围内对小灯泡的电压进行测量，画出实验电路原理图。

2〕实验测得该小灯泡伏安特性曲线如图〔a〕所示。

由实验曲线可知，随着电流的增加小灯泡的电阻_________〔填“增大〞“不变〞或“减小〞〕，灯丝的电阻率__________〔填“增大〞“不变〞或“减小〞〕。

〔3〕用另一电源E0〔电动势4V，内阻〕Ω和题给器材连接成图〔b〕所示的电路，调节滑动变阻器R的阻值，可以改变小灯泡的实际功率。

人教版七年级下册语文作文汇编训练试题含答案（Word版）一、部编七年级语文下册作文汇编1．题目：永存心间的感动要求：写一篇500字左右的文章。

不得透露个人相关信息。

【答案】【参考例文】永存心间的感动生活中有许多的点点滴滴，虽然细小，却使人感到温暖。

或是一份满满当当的讲义，或是一个鼓励的眼神，或是一份“爱心便当”……在一次次的感动中，我慢慢地成长了，变得成熟。

那年的春天，又是春寒料峭。

我也是很不幸地，得了流感，缺席了一次课外数学课，又是不擅长的知识点，我不禁心急如焚。

下一堂课，怀着忐忑的心情去应付有些难度的课前测，感觉手是冰凉的，一摸，有些手汗，不由得又紧张起来。

那份试卷没有被放到桌子上来，取而代之的是一张上次课的讲义。

每一题都有详细的解答过程，知识要点都用荧光笔划出来了。

这份讲义是老师为我准备的！我望向老师，发现老师也看着我。

她用手往下指指，示意我学习上次课的讲义。

我看着这份满满当当的讲义，心中一股暖流涌过。

那份讲义饱含着一位老师对学生的关心、负责。

老师给我的温暖，我将永远铭记心底。

有一次，和一位好友一同去参加琵琶比赛。

比赛前，我调试琴弦，发现突然走音了。

我握住琴的弦轴，用力往后一掰。

不曾想，那弦竟是那样弱不禁风——沉闷的一声“砰”，弦断了！而我即将进入赛场。

好友将她的好琴塞到我手臂里，冲我眨眨眼睛，投来了一个鼓励的眼神。

这是来自竞争对手的鼓励。

虽然这只是生活中的一个小细节，可我永远不会忘记那个鼓励的眼神。

五年级的时候，我奔波于越来越多的课外班之间，有时没时间吃午饭。

母亲心疼我，便在家里提前做好便当，给我带在路上吃。

我很快就不满足于那几道重复的饭菜：回锅肉、三文鱼、时蔬、咸肉菜饭。

母亲知道我喜欢吃牛腩，悄悄地琢磨番茄牛腩的做法。

不久，我的便当里多了一份番茄牛腩。

放入口中，烂而不腻。

喝了一口汤，酸甜中有一丝咸味，好吃！母亲笑吟吟地，递来其他几个菜。

我看到母亲的食指上好像有一道创口贴。

想起自己还经常挑剔母亲做的饭菜，母亲也不曾数落过我，我顿时感受到了母爱的温暖，这种爱也深深打动了我。