【全国百强校】吉林省长春外国语学校2020-2021学年八年级下学期期中考试数学试题
吉林省长春市外国语学校2020-2021学年八年级下学期期末英语试题
绝密★启用前吉林省长春市外国语学校2020-2021学年八年级下学期期末英语试题试卷副标题注意事项：1．答题前填写好自己的姓名、班级、考号等信息 2．请将答案正确填写在答题卡上第I 卷（选择题）请点击修改第I 卷的文字说明一、单项选择 1．I enjoy having ________ breakfast with my family at home. It makes me feel relaxed. A ．aB ．anC ．theD ．/2．The little kids ran to their parents with ________ at the school gate after school. A ．excitementB ．progressC ．experienceD ．development3．He won’t borrow money from his friends ________ he really has to. A ．whenB ．sinceC ．becauseD ．unless4．As soon as he ________ in Guangzhou next Monday, he will call me. A ．will arrive B ．arrives C ．is arrivingD ．arrived5．—I never thought she would ________ my invitation to the concert. —What a pity! She would feel sorry for missing the concert some day. A ．remindB ．refuseC ．supposeD ．accept6．One of the oldest museums in the small town ________ here for over twenty years. A ．has beenB ．have beenC ．has goneD ．have gone7．—I haven't been to the Palace Museum. What about you? — I am planning to go there this weekend. A ．Me tooB ．Me neitherC ．So did ID ．Neither did I8．---I don't want to ______ my old friends.---You can still communicate with them after going to a new school. A ．clear outB ．check outC ．help withD ．part with9．—________ is the population of Changchun City? —It’s over nine million. A ．How manyB ．How muchC ．WhatD ．How10．How long have you .here? For two days. I ________ here the day before yesterday. A ．been; cameB ．come; cameC ．came; cameD ．come; was11．________ wonderful music Lang Lang and Gina played just now! A ．WhatB ．What aC ．HowD ．How a12．________ a job you love, and you’ll never work a day in your life. A ．FindB ．FindingC ．To findD ．Found13．No ocean in the world is as ________ as the Pacific Ocean. A ．bigB ．biggerC ．biggestD ．the biggest14．—What else did Tina ask you about the trip to Nanjing? —She asked me ______. A ．who was the guide of the tripB ．when they will visit the Presidential PalaceC ．how long would they stay at Nanjing MuseumD ．if she can go to Nanjing University alone on the second day 15．—Shall we make a cake for Tina as a birthday gift? —________. It will give her a big surprise. A ．It’s a pityB ．Good ideaC ．You’re welcomeD ．Never mind二、补全对话6选5 根据对话内容，运用方框中所给的句子补全对话。
吉林省长春外国语学校2020-2021学年七年级上学期期中考试英语试题
【百强校】吉林省长春外国语学校2020-2021学年七年级上学期期中考试英语试题学校:___________姓名：___________班级：___________考号：___________一、根据首字母填空根据语境及所给字母的提示，补全所缺单词,使句子意思完整、语法正确。
1．Smith is Frank Smith’s l_______ name.2．We have e______ classes every day, four in the morning and four in the afternoon. 3．You can borrow books from the school l______.4．—Paul, are Joan and Bill in the s ______school?—Yes. They're at Brown School.5．Helen is a clean girl and her bedroom is a______ tidy.二、用所给单词的正确形式填空用括号内所给单词的适当形式填空。
6．Here ______ (be) some photos of my family.7．—Hello, Ann. Is this your ruler?—No, it isn't. I think it's______ (Sally).8．My brother and I ______ (play) sports every day.9．Mr Liu is busy now. Please call ______ (he) later.10．Linda has two ______ (dictionary). One is Chinese and the other is English.三、单选题11．______ girl in ______ room is my friend.A．A; the B．A; aC．The; a D．The; the12．—What ______ three and six?—Nine.A．am B．isC．are D．be13．—Is the CD ______?—No, it's ______.A．her; Alex B．her; Alex's C．hers; Alex D．hers; Alex's 14．My bag is red, ______ my sister's ______ red, too. A．and; is B．but; is C．and; isn't D．but; isn't 15．—Where are my jackets?— ______ on your bed.A．It is B．That isC．These are D．They are16．— ______ do you spell "English"?— E-N-G-L-I-S-H.A．What B．WhereC．How D．Who17．John is my mother's brother, so he is my ______. A．uncle B．fatherC．cousin D．grandfather18．— ______?— No, it's on the bed.A．Is that your bookB．Where is your bookC．What about this bookD．Is your book on the table19．—______, Alan. Is that your card?— Yes, it is. It's mine.A．Spell itB．Excuse meC．Thank youD．Nice to meet you20．I go to school ______ my brother Mickey.A．to B．forC．with D．under21．I don't have a black pen, ______ Gary ______.A．and; do B．and; doC．but; does D．but; doesn't 22．Max, let's ______ Jimmy for the interesting books.A．ask B．askingC．asks D．to ask23．—The game is at 10:00. Don't be ______, Jane.— OK, Ms. Smith.A．tidy B．welcomeC．late D．fine24．—Sally, what about going to the classroom?— ______.A．You're welcome B．Have a good dayC．Nice to meet you D．That sounds good四、句型转换按要求转换句型。
2020-2021学年度第二学期八年级期中考试英语试卷（含答案）
2020-2021学年度第⼆学期⼋年级期中考试英语试卷（含答案）第⼆学期⼋年级期中考试英语试卷试卷总分80 分，考试时间60 分钟⼀.单项选择(每⼩题1分，共10分)( )1. my surprise, the dog really can .A.In, pick it upB.To, pick it upC.In, pick up itD.To, pick up it( )2.I don't mind the floor,but I think there's no need it every day.A.to sweep, sweepingB.sweep, to sweepC.sweeping, sweepingD.sweeping, to sweep( )3.—How is your grandma?—She’s fine. She used to TV at home after dinner.But now she is used to out fora walk.A.watching,goB.watch,goingC.watching, goingD.watch,go( )4.His mother’s made him very sad.But he kept on hard.A.die,workingB. dead,weC. death, to workD.death,working( )5.My pocket money and he also his money.So we had to walk home.A.ran out of, ran outB.ran out, run outC.ran out of, ran outD.ran out, ran out of( )6. If you want to know more information about the coming party,please the website.B.call upC.set upD.look through( )7.She practiced for the dancing competition ,but she didn't feel .A.alone,lonely B alone,alone C.lonely,lonely D. lonely,alone( )8.—How long may I your bike?—For a week. But you mustn’t it to others.A. borrow, lendB.keep, lendC.lend, borrowD.keep, borrow( )9.The charity homeless people food and clothes.A.offers,withB.provides,forC.provides,withD.offers, for( )10.You will achieve nothing you work hard.A.ifB.unlessC.whenD.that⼆.完形填空(每⼩题1分，共10分)One day,when a successful businessman opened the door of his car,a dog sleeping 11 his car suddenly came out andbit(咬)his leg! He threw a stone at the dog, 12 he was not able to hit it.How angry he was! After he 13 his office,the businessman called a meeting of the workers. He took out his anger(愤怒)on them. Gradually, the businessman’s anger 14 the whole company. The businessman was still angry after returning home.His wife asked him,“Why are you so late today?”The man 15 ,“I didn't go to the office to play soccer.I went to work.So don't ask such a stupid question!” His wife was confused about being shouted at 16 .She turned her anger on their son who was watching TV.“This all you do.You have no 17 in studying! Turn off the TV now!”She shouted.The son became 18 as well.He walked out of his house and saw a dog passing by.He picked up a stone and threw it at the dog 19 .The dog ran away,barking(吠叫) in pain.Sometimes,when we are angry about something, we might take out our anger on 20 .We should learn to control our anger.C.in front of( )11.A.on( )12.A.although ( )13.A.got to ( )14.A.ran into ( )15.A.answered ( )16.A.for no reason ( )17.A.interest B.underB.butB.reached atB.came overB.after a whileB.attentionC.in front ofC.unlessC.arrivedC.spread throughC.repeatedC.in that caseC.choice( )18. A.relaxed ( )19.A.angrily ( )20.A.another B.lonelyB.actuallyB.any otherC.upsetC.simplyC.others三.阅读理解(10分)AIt was raining heavily as I was walking up the hill towards the station at six o’clock on a Saturday morning.At this early hour there wasn't much traffic and there weren’t many people.Just as I was crossing the road near the top of the hill,a car came around the corner. It was traveling very fast. Suddenly it hit a lamp post(路灯柱)and turned over.I ran to the car to help the driver at once. He was badly hurt and there was a lot of blood on his face.A young woman hurried into the station and phoned for an ambulance(救护车)while I took care of the driver.Many people came to see what happened.A policeman arrived a few minutes later and asked me a lot of questions about the accident. After a while the ambulance arrived and the driver was sent to the hospital.On Monday morning I went to the hospital to see the man.The doctor told me that he was much better, and he would leave the hospital after a few days’ rest.( )21.Where did the accident happen?A.Near the school.B.Near the top of the hill.C.Near the hospital.( )22.What happened to the driver?A.He drove the car and lost his way.B.His car hit a lamp post and turned over.C.His car suddenly broke down on the way.( )23,Who hurried to the station to phone for an ambulance?A.The writerB.A policemanC. A young woman( )24.What did the policeman do?A.He asked the writer a lot of questions.B.He sent the driver to the hospital.C.He phoned for an ambulance.( )25. What happened to the driver at the end of the story?A.The policeman took him away.B. He died in the accident.C.He got better in the hospital.BMany years ago,there was something wrong with my left eye. At last, The doctor told me that I could never see from that eye again.26. At that time, I often got angry and didn't want to do anything. No one wanted to help me.27. A man came and sat down next to me.He turned to me and smiled.Then he said,“it seems that you need a friend to talk to.” We sat there for hours just talking like old friends.28. Then his train came.He stood up and gave me a wonderful hug.I will never forget it. Then he got on the train and give me another of his big smiles and said, “Remember, a smile is the most beautiful part of a person.”I never saw him again.29. A smile can open doors.You can smile at anyone in the street.It is OK if you don't know him.3026. 27. 28. 29. 30.四.词汇运⽤。
【全国百强校】吉林省长春外国语学校2016-2017学年高二上学期期中考试英语试题
长春外国语学校2016-2017学年高二上期期中考试英语学科试卷(外专版)出题人：刘英晖审题人: 王亚芳第Ⅰ卷选择题（共 90 分）第二部分：阅读理解（共两节，满分 30 分）第一节：（共10小题；每小题2分，满分20分）阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
A“Music is a moral law. It gives soul to the universe, wings to the mind, flig ht to the imagination, and charm and joy to life and to everything,” the ancient Greek philosopher Plato said.This is one of Don Spencer’s favorite mottos that he firmly believes. “We know that music brings joy and comfort, and makes us feel happy,” Spenc er says, “But research has also discovered music plays a powerful role in the mental development of children. Music inspires creativity, imagination and self-expression. It also builds self-respect and is good for memory skills.”The power of musicMuch research supports both Spencer and Plato. A Stanford University study found that musical training improves the way the brain processes the spoken word.Research from Canada found that children aged four to six years old who had music lessons had better memories, as well as higher ability to read and write and math’s levels.Not in the curriculumResearch from Australia shows it’s not that smart kids play music; it’s that music makes kids smarter. It supports Spencer’s call for music to be a standard part of the school curriculum, like English and Math.“Music is everywhere, but not at 75 percent of public schools around Australia who don't have a devoted music teacher,” Spencer says. “It's sad that many children don’t have access to formal musical education, particularly when it has such an effect on a child’s development.”Ideally, Spencer would like every child to le arn an instrument. “Kids can access cheap instruments like a ukulele, recorder or harmonica,” Spencer says. He says the Internet has a lot of free videos which teach you how to play instruments.“I can't stress enough how important music is,” he says. “It builds relationships, unites people and, most importantly, it is fun.”21. Plato’s words are mentioned at the beginning of the text to show t hat______.A. music has magic powerB. everything is based on musicC. Spencer admires PlatoD. music was important in ancient time22. From the research from Australia mentioned in the passage, we can learn ______.A. music can make children smarterB. children aged four to six have better memoriesC. there are no professional music teachers in AustraliaD. music is a standard part of the school curriculum in most schools23. What might be the best title for the passage?A. When Music is TaughtB. Why Music MattersC. Why We Learn InstrumentsD. How Children Learn MusicBGood manners are important, but you can easily make a social blunder when you visit a foreign country, because sometimes good manners in one place are bad manners in other places.Suppose you visit some friends in Mongolia and they ask you to eat with them. What kind of manners do they want you to have? They want you to give a loud “burp” after you finish eating. Burping shows that you like your food. But in some other countries, if you give a loud “burp”, you are supposed to say, “Excuse me, please.”In many places people like to eat together. But in some parts of Polynesia it is bad manners to be seen eating together. People show their good manners by turning their backs on others while they eat.What are manners like in an East African town? The people try not to see you. When you are visiting a friend, he may not see you at all. If you are polite, you will sit down beside him. You will wait until he finishes what he is doing. Then he will talk to you.If you visit a friend in Arabia you should walk behind other tents until you come to his tent. If you pass in front of other tents, you will be asked into each one. The people will ask you to eat with them. And it is bad manners if you say no.Manners are different all over the world. But it is good to know that all manners help people show that they want to be friends.24. People turn their backs to others while they eat in some places in______.A. MongoliaB. an East African townC. PolynesiaD. Arabia25. In an East African town, people try not to see you. This is because______.A. they are not your friendsB. they don’t want to talk with youC. it is good mannersD. they are waiting for you to talk with them26. Which is true according to the passage?A. People show they are friendly in different manners.B. Good manners are the same in different countries.C. In the East African town the people who try not to see you are not polite at all.D. In Arabia it is polite to say no when people invite you to eat with them.CWeddings in the United States vary as much as the people do. There are church weddings with a great deal of fanfare(仪式上的短曲); there are weddings on mountain tops with guests barefooted; there have been weddings on the ocean floorwith o xygen tanks for the guests. But many weddings, no matter where or how they are performed, include certain traditional customs.Before a couple is married, they become engaged. And then invitations are sent to those who live nearby, their close friends and their relatives who live far away. When everything is ready, then comes the most exciting moment.The wedding itself usually lasts between 30 and 40 minutes. The wedding party enters the church while the wedding march is played. The bride carrying a bouquet enters last with her father who will “give her away”. The groom enters the church from a side door. When the wedding party is gathered by the altar, the bride and groom exchange vows(誓言). It is traditional to use the words “to have and to hold from this day forward, for better, for worse, for richer, for poorer, in sickness and in health, t o love and to cherish, till death do us part.” Following the vows, the couple exchange rings. Wearing the wedding rings on the fourth finger of the left hand is an old custom.After the ceremony, there is often a party, called a “reception” which gives the wedding guests an opportunity to congratulate the new couple.The car in which the couple leaves the church is decorated with balloons. The words “Just Married” are painted on the trunk or back window. And then the couple go in their honeymoon.27. The underlined word “party” in Paragraph 3 probably means______.A. a group of peopleB. a legal agreementC. a political organizationD. a social event28. According to the passage, the bride enters the church______.A. carrying a bunch of flowerB. with the groomC. with the bridesmaidD. from a side door.29. Which of the following statement is NOT true?A. In the United States, there are different weddings.B. Americans seldom send invitations to others when get married.C. At the reception, guests usually give their wishes to the new couple.D. Americans usually wear rings on the fourth finger of the left hand.30. What will the author most probably talk about next?A. The food served in the wedding party.B. The possible places where the new couple spend their honeymoon.C. How to congratulate the new couple.D. The estimated cost of a wedding ceremony.第二节（共5小题；每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。
吉林省长春市长春外国语学校2022学年八年级语文下学期期中考试模拟押题人教版
长春外国语学校2022——2022学年第二学期期中考试初二年级语文科试卷一、阅读（60分）（一）名句积累与运用（15分）1单车欲问边，属国过居延。
□□□□□，□□□□□。
（王维《使至塞上》）2 □□□□□，潭影空人心。
（常建《题破山寺后禅院》）3．浩荡离愁白日斜，吟□□□□□□。
4．李商隐《无题》中常被用来歌颂勇于牺牲自己，默默奉献精神的诗句是：□□□□□□□，□□□□□□□。
5．陶渊明《饮酒》中写山间晚景，表明诗人归返田园的惬意情怀的诗句是：□□□□□，□□□□□。
6．《渔家傲·秋思》中抒发了诗人壮志难酬的感慨和思乡忧国情怀的诗句是：□□□，□□□□□□□。
7．《题李凝幽居》中以动写静，衬托出四野的静谧荒寂的诗句是：□□□□□，□□□□□。
8．诗有抒情诗，亦有哲理诗。
请任意写出古诗词中含有哲理的连续两句诗句。
诗句：，。
（二）文言文阅读（15分）（甲）阅读下文，回答问题。
（10分）记承天寺夜游苏轼元丰六年十月十二日，夜，解衣欲睡，月色入户，欣然起行。
念无与为乐者，遂至承天寺，寻张怀民，怀民亦未寝，相与步于中庭。
庭下如积水空明，水中藻荇交横，盖竹柏影也。
何夜无月，何处无竹柏，但少闲人如吾两人者耳。
9苏轼，字，号，北宋、。
（2分）10．解释下列加点词语在文中的意思。
（2分）①念．无与为乐者（）②相与．．步于中庭（）③积水空明．．（）④但．少闲人（）11“月光如水”的比喻是常有的，但运用之妙，因人而异。
不能说本文作者没用这个比喻，但和一般用法不同。
试分析其妙处。
（2分）12你认为文中所说的“闲人”是怎样一种人（2分）13本文是苏轼被贬黄州期间的一篇小品文。
虽只有85字，却种种难言之情尽在其中。
综观全文，谈谈表达了作者怎样的情感（2分）（乙）阅读下文，回答问题。
（5分）身无长物王恭①从会稽②还，王大③看之。
见其坐六尺簟④，因语恭：“卿东⑤来，故应有此物，可以一领⑥及我”恭无言。
大去后，即举所坐者送之。
吉林省长春市2021-2022学年八年级下学期期中测试英语试卷
2021-2022学年度下学期八年级期中线上考试英语试卷一.听力部分（25分）I.根据你所听到的句子，选择恰当的应答语。
(5分)1.A.Don’t say that. B.I’m sorry to hear that. C.It’s great.2.A.You’re welcome. B.OK.Thanks. C.I don’t know.3.A.Yes,I’d like to. B.I want to go to the park. C.You’re great.4.A.You should have a sleep. B.You are right. C.You are too busy.5.A.I’m cooking. B.I lost my pen. C.I was sleeping. II.根据你所听到的对话及问题,选择正确答案。
(5分)6.A.He has a sore throat. B.He has a headache. C.He has a fever.7.A.Playing soccer. B.Playing basketball. C.Playing tennis.8.A.Tom. B.Tom’s sister. C.Tom’s brother.9.A.In the kitchen. B.In the study. C.In the living room.10.A.Linda’s. B.The man’s. C.The girl’s mother. III.选择与你所听到的描述内容相符合的图片，其中有一副是多余的。
(5分)A B CD E FIV.听较长对话,选择最佳答案。
(5分)听第一段对话，作答第16—17小题。
16.What is the most important thing Jack should pay attention to?A.The weather.B.Enough food.C.A mobile phone.17.Why does Jack need to take a mobile phone?A.Because he can call his friends during the walk.B.Because he can get help from others when something happens.C.Because he can know the time.听第二段对话作答18-20小题。
长春市长春外国语学校2020_2021学年高一化学上学期期中试题
吉林省长春市长春外国语学校2020—2021学年高一化学上学期期中试题本试卷分第Ⅰ卷（选择题）和第Ⅱ卷（非选择题）两部分,共4页。
考试结束后,将答题卡交回。
注意事项：1。
答题前，考生先将自己的姓名、准考证号填写清楚，将条形码准确粘贴在考生信息条形码粘贴区。
2．选择题必须使用2B铅笔填涂；非选择题必须使用0.5毫米黑色字迹的签字笔书写,字体工整、笔迹清楚。
3．请按照题号顺序在各题目的答题区域内作答，超出答题区域书写的答案无效；在草稿纸、试题卷上答题无效。
4．作图可先使用铅笔画出，确定后必须用黑色字迹的签字笔描黑.5。
保持卡面清洁，不要折叠,不要弄破、弄皱,不准使用涂改液、修正带、刮纸刀。
可能用到的相对原子质量：C—12 H—1 O—16 N—14 Fe—56 Na—23 S—32第Ⅰ卷选择题一、选择题:本题共20小题，每小题2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．分类是科学研究的重要方法，下列物质分类不正确．．．的是A．酸性氧化物：干冰、二氧化硫、三氧化硫B．同素异形体：石墨、金刚石、C60C．碱性氧化物：氧化钙、氧化铁、过氧化钠D．电解质:硫酸、烧碱、氯化钠2．在沸水中逐滴加入5～6滴 FeCl3饱和溶液，继续煮沸至溶液呈红褐色,停止加热。
下列说法正确的是A．用激光笔照射该液体，会出现丁达尔效应B．将液体静置片刻，会出现沉淀现象C．所得分散系中分散质的粒子直径大于100 nmD．用滤纸可实现该分散系中分散剂与分散质的分离3．下列图示中逻辑关系正确的是A。
B。
C。
D。
4．下列各组离子，不能．．在溶液中大量共存的是A．能使酚酞变红的溶液:Na+、SO42ˉ、C lˉ、CO32ˉB．能使紫色石蕊变红的溶液:Mg2+、Cu2+、Na+、ClOˉC．含FeCl3的溶液：Na+、NH4+、SO42ˉ、NO3ˉD．含Na2SO4的溶液:Κ+、Mg2+、Iˉ、Clˉ5．下列离子方程式的书写正确的是A．过量的CO2与澄清石灰水反应：OHˉ+CO2=HCO3ˉB．铁片投入稀硫酸中：2Fe+6H+=2Fe3++ 3H2↑C．碳酸氢钠溶液与NaOH溶液反应：OHˉ+H+=H2OD．向Ba(OH)2溶液滴加NaHSO4溶液至Ba2+恰好沉淀:Ba2++2H+ +2O Hˉ+SO42ˉ=BaSO4↓+ 2H2O6．某工业废水中存在大量的Na+、Cl—、Cu2+、SO42ˉ，欲除去其中的Cu2+、SO42ˉ(为使离子完全沉淀，沉淀剂需要过量），设计工艺流程如图所示：下列说法不正确．．．的是A．NaOH的作用是除去Cu2+ B．试剂a为Na2CO3，试剂b为BaCl2C．流程图中，操作x为过滤D．试剂c为盐酸7．根据下列反应的化学方程式：I2+SO2+2H2O=H2SO4+2HI，2FeCl2+Cl2=2FeCl3，2FeCl3+2HI=2FeCl2+2HCl+I2,判断有关物质的还原性强弱顺序是A．Iˉ＞Fe2+＞Clˉ＞SO2B．Clˉ＞Fe2+＞SO2＞IˉC．Fe2＋＞Iˉ＞Clˉ＞SO2 D．SO2＞Iˉ >Fe2+＞Clˉ8．R2O4xˉ离子在酸性溶液中与MnO4ˉ反应,反应产物为RO2、Mn2＋、H2O。
吉林省长春市省第二实验(高新、远洋)学校2021-2022学年八年级下学期期中英语试题(五四学制)
吉林省长春市省第二实验（高新、远洋）学校2021-2022学年八年级下学期期中英语试题（五四学制）学校:___________姓名：___________班级：___________考号：___________一、单项选择1．My cousin is such ________ honest man that all of us like him very much.A．a B．an C．the D．/2．—_________ have you lived in the countryside?—Since five years ago.A．How soon B．How much C．How often D．How long 3．—Where is Lucy? I haven’t seen her for days.—She ________ Chengdu. She’ll be back next week.A．has gone to B．has been to C．have gone to D．have been to 4．—Are you looking for your car?—Yes, I am. I parked my car ________ in this area, but now I can’t find it. A．somewhere B．anywhere C．nowhere D．everywhere 5．My sister wants to save some money ________ she can buy her favorite schoolbag. A．unless B．until C．so that D．as soon as 6．The basketball game was wonderful yesterday, ________ the 3 points at the last minute. A．probably B．recently C．mostly D．especially 7．—Are you interested in the ending of the movie?—I have to say “No”, because she ________ me the story.A．tells B．will tell C．has told D．is telling 8．—Do you know The Three-Body Problem will soon be made into an English-language TV show?—Fantastic. I’m sure it will be very popular ________ young people.A．among B．opposite C．between D．through 9．—The songs the little girl sings are very sweet.—She ________ a good voice. Nobody taught her.A．takes care of B．is similar to C．looks forward to D．is born with 10．—Could you please tell me the meaning of the word “attention”?—Sorry, I don’t know, either. Why not ________ in the dictionary?A．give it up B．lay it out C．hand it out D．look it up 11．Mr. Wang is very friendly to us. He is__________ of all the persons I know. A．patient B．less patientC．more patient D．the most patient :12．—________rapid progress our country is making in science and technology!—So it is. We are enjoying the convenience of modern technology.A．What B．How C．What a D．How a 13．________ the reading speed, we should pay attention to the key words, not read word by word.A．To increase B．Increase C．Increasing D．Increased 14．I have some tickets for the football match. I called my friends to see___________. A．where did they buy them B．why they liked to go thereC．when did we go together D．whether they’d like to go15．—I haven’t seen the play Teahouse.—________. Shall we go and see it this weekend?A．Yes, please B．No, thanks C．Me neither D．Me too二、补全对话6选5根据对话内容，运用文后所给的句子选项补全对话，选项中有一项是多余的。
吉林省长春外国语学校2020-2021学年七年级上学期第一次月考英语试题(1)
【全国百强校】吉林省长春外国语学校2020-2021学年七年级上学期第一次月考英语试题学校:___________姓名：___________班级：___________考号：___________一、根据首字母填空I. 根据句意及首字母填单词。
1．Bob and I are good f_____________. We often play together.2．---What n______________ are you? ---I'm Chinese.3．Two and z______________ is two.4．John is ill. He's a___________ from class today.5．It's 11:05 now, it's time f________ lunch in CFLS.二、用所给单词的正确形式填空II. 用所给词的适当形式填空，使句子完整、通顺。
6．The jackets ______________ (be) green.7．---What is ______________ (she) name? --- She’s Linda.8．Eric comes from Germany, he is a ____________ (Germany) boy.9．I study many ___________ (subject) in CFLS, and l like English best.10．Those are their ______ (photo).三、单选题11．David is ______ eight-year-old boy with short black hair.A．/ B．a C．an D．the12．--- ______ ? --- I’m fine, thank you.A．What’s your name B．What color is itC．How are you D．What’s her last name13．--- Good evening, Li Ping.--- ______, Tom.A．Good evening B．Good afternoon C．Good morning D．Good night 14．–Look! What’s ______ in the sky(天空)？ --It’s a bird.A．this B．that C．it D．those 15．Teachers' Day is in ______ in China.A．August B．September C．October D．November16．Here ______ our pictures.A．am B．are C．is D．be 17．--- What are these? ---______ are jackets.A．They B．These C．Those D．It 18．--- Thanks a lot. --- ______.A．You’re right B．OKC．You’re welcome D．Let's go19．--- ______ is the boy with a pair of glasses? --- John.A．How B．Who C．Where D．What20．She is Alice Smith. We can call her ______.A．Mrs. Alice B．Mr. Smith C．Ms. Alice D．Ms. Smith21．My car number is 98765. It reads(读作) ______.A．nine eight six seven five B．nine eight seven six five C．eight nine seven six five D．nine eight seven five six22．---Hi, Jack. Have a good day! ---______, the same to you!A．I’m fine B．Thank you C．No, thanks D．Oh, I see 23．My friend is ______. She is 15 years old.A．in Chinese B．China C．in China D．at China24．______ two cups are Kate’s.A．This B．/ C．These D．A 25．–Is that your grandmother? --______.A．Yes, he is B．No, it isn’t C．Yes, that is D．No, that isn’t四、句型转换Ⅳ. 按要求转换句型。
吉林省长春市长春外国语学校2025届数学八上期末综合测试试题含解析
吉林省长春市长春外国语学校2025届数学八上期末综合测试试题 合测试试题考生须知： 1．全卷分选择题和非选择题两部分，全部在答题纸上作答。
选择题必须用2B 铅笔填涂；非选择题的答案必须用黑色字迹的钢笔或答字笔写在“答题纸”相应位置上。
2．请用黑色字迹的钢笔或答字笔在“答题纸”上先填写姓名和准考证号。
3．保持卡面清洁，不要折叠，不要弄破、弄皱，在草稿纸、试题卷上答题无效。
一、选择题（每题4分，共48分） 1．如果分式53x +有意义，则x 的取值范围是（ ） A ．x ＜﹣3B ．x ＞﹣3C ．x≠﹣3D ．x=﹣32．如果等腰三角形的一个角是80°，那么它的底角是 A ．80°或50° B ．50°或20° C ．80°或20°D ．50° 3．三角形的五心在平面几何中占有非常重要的地位，这五心分别是：重心、外心、内心、垂心、旁心，其中三角形的重心是三角形的（ ） A ．三条角平分线的交点 B ．三条中线的交点 C ．三条高所在直线的交点 D ．三边垂直平分线的交点4．如图，∠BCD ＝90°，AB ∥DE ，则∠α与∠β满足( )A ．∠α+∠β＝180°B ．∠β﹣∠α＝90°C ．∠β＝3∠αD ．∠α+∠β＝90°5．化简的结果是（ ）A ．4B ．2C ．3D ．26．下列计算结果为6a 的是（ ） A ．7a a -B ．83•a aC ．28a a ÷D ．42()a7．若正多边形的一个外角是60︒，则这个正多边形的内角和是（ ）A ．540︒B ．720︒C ．900︒D ．1080︒8．若分式33x x -+的值为零，则x 的值是（ ） A ．3B ．－3C ．±3D ．09．下列各式由左边到右边的变形中，是分解因式的为（ ） A ．10x 2－5x =5x (2x －1) B ．a(x +y ) =a x +a yC ．x 2－4x +4=x (x －4)+4D ．x 2－16+3x =(x －4)(x +4)+3x10．王珊珊同学在学校阅览室借了一本书，共240页，管理员要求在两周内归还，当她读了这本书的一半时，发现每天要多读5页才能在借期内读完，问前一半她每天读多少页？如果设前一半每天读x 页，则下列方程正确的是（ ） A ．120120145x x +=- B ．240240145x x +=+ C ．141415x x +=+D ．120120145x x +=+ 11．因式分解x 2+mx ﹣12＝（x +p ）（x +q ），其中m 、p 、q 都为整数，则这样的m 的最大值是（ ） A ．1B ．4C ．11D ．1212．如图，已知30MON ∠=︒，点1A ，2A ，3A ，在射线ON 上，点1B ，2B ，3B ，在射线OM 上，112A B B ∆，223A B B ∆，334A B B ∆，均为等边三角形．若11OB =，则889A B B ∆的边长为（ ）A ．64B ．128C ．132D ．256二、填空题（每题4分，共24分）13183023=____________．14．把命题“三角形内角和等于180°”改写成如果 ，那么 ．15．若实数m n 、满足4|30|m n -﹣＝，且m n 、恰好是直角三角形的两条边，则该直角三角形的斜边长为_____．16．如图，△ABC 的三边AB ，BC ，CA 的长分别为14，12，8，其三条角平分线的交点为O ，则::ABOBCOCAOSSS=_____．17．今天数学课上,老师讲了单项式乘以多项式,放学回到家,小明拿出课堂笔记本复习,发现一道题:-3xy (4y-2x-1)=-12xy 2+6x 2y+□,□的地方被墨水弄污了,你认为□处应填写_________.18．如图，ABC ∆中，90ACB ︒∠=，30B，4AC cm =，P 为BC 边的垂直平分线DE 上一个动点，则ACP ∆的周长最小值为________cm ．三、解答题（共78分） 19．（8分）（1）解方程：33122x x x-+=--﹔ （2）已知3a b +=，2ab =，求代数式32232a b a b ab ++的值．20．（8分）解方程：11x =-233x x - +1． 21．（8分）如图，AB // CD ，Rt △EFG 的顶点F ，G 分别落在直线AB ，CD 上，GE 交AB 于点H ，∠EFG =90°，∠E =32°． （1）∠FGE = °（2）若GE 平分∠FGD ，求∠EFB 的度数．22．（10分）某校为了解学生的安全意识情况，在全校范围内随机抽取部分学生进行问卷调查，根据调查结果，把学生的安全意识分成“淡薄”、“一般”、“较强”、 “很强”四个层次，并绘制成如下两幅尚不完整的统计图：根据以上信息，解答下列问题：（1）该校有1200名学生，现要对安全意识为“淡薄”、“一般"的学生强化安全教育，根据调查结果，估计全校需要强化安全教育的学生约有多少名？ （2）请将条形统计图补充完整．（3）求出安全意识为“较强”的学生所占的百分比．23．（10分）如图，已知ABC ∆中，90ACB ∠=︒，点D 在边AB 上，满足2CDB B ∠=∠，（1）求证：2AB CD =；（2）若:DB 1:5AD =，且ABC ∆的面积为2，试求边AB 的长度．24．（10分）如图，分别是4×4的正方形网格，请只用无刻度的直尺完成下列作图：（1）在图1中，A ，B 是网格的格点，请以AB 为边作一个正方形；（2）在图2中，A 是网格的格点，请以A 为一个顶点，B ，C ，D 三点分别在网格的格点上，在网格内作一个面积最大的正方形ABCD ．25．（12分）某区在实施居民用水额定管理前，对居民生活用水情况进行了调查，下表是通过简单随机抽样获得的50个家庭去年月平均用水量（单位：吨），并将调查数据进行如下整理：4.7 2.1 3.1 2.35.2 2.8 7.3 4.3 4.86.7 4.5 5.1 6.5 8.9 2.2 4.5 3.2 3.2 4.5 3.53.5 3.5 3.64.9 3.7 3.85.6 5.5 5.96.25.7 3.9 4.0 4.0 7.0 3.7 9.5 4.26.4 3.54.5 4.5 4.65.4 5.66.6 5.8 4.5 6.27.5频数分布表分组划记频数2.0＜x≤3.5正正113.5＜x≤5.0195.0＜x≤6.56.5＜x≤8.08.0＜x≤9.5 2合计50（1）把上面频数分布表和频数分布直方图补充完整；（2）从直方图中你能得到什么信息？（写出两条即可）；（3）为了鼓励节约用水，要确定一个用水量的标准，超出这个标准的部分按1.5倍价格收费，若要使60%的家庭收费不受影响，你觉得家庭月均用水量应该定为多少？为什么？26．先化简，再求值：[(x-1y)1-x(x-4y)-8xy]÷4y，其中x=-1，y=1．参考答案一、选择题（每题4分，共48分）1、C【解析】分式有意义，分母不为0，由此可得x+3≠0，即x≠﹣3，故选C.2、A【解析】根据题意，分已知角是底角与不是底角两种情况讨论，结合三角形内角和等于180°，分析可得答案．【详解】根据题意，一个等腰三角形的一个角等于80°，①当这个角是底角时，即该等腰三角形的底角的度数是80°，②当这个角80°是顶角，设等腰三角形的底角是x°，则2x+80°=180°，解可得，x=50°，即该等腰三角形的底角的度数是50°；故选：A．【点睛】考查了等腰三角形的性质，及三角形内角和定理；通过三角形内角和，列出方程求解是正确解答本题的关键．3、B【分析】根据三角形重心的概念解答即可.【详解】三角形的重心为三角形三条中线的交点故选B【点睛】本题主要考查了三角形重心的概念，掌握三角形重心的概念是解题的关键.4、B【详解】解：过C 作CF ∥AB ，∵AB ∥DE ， ∴AB ∥CF ∥DE ，∴∠1=∠α，∠2=180°﹣∠β， ∵∠BCD =90°，∴∠1+∠2=∠α+180°﹣∠β=90°， ∴∠β﹣∠α=90°， 故选B ． 5、B【解析】试题解析：.故选B.考点：二次根式的化简. 6、C【解析】根据幂的运算法则分别判断各选项是否正确即可解答. 【详解】解：76a a a -≠，故A 错误；8311•=a a a ，故B 错误； 286=a a a ÷，故C 正确； 428()=a a ，故D 错误；故选：C. 【点睛】本题考查了幂的运算法则，准确计算是解题的关键. 7、B【分析】利用多边形外角求得该多边形的边数，再利用多边形内角和公式即可解答． 【详解】解：多边形外角和为360°，故该多边形的边数为360°÷60°=6； 多边形内角和公式为：（n -2）×180°=（6-2）×180°=720° 故选：B ． 【点睛】本题考查了多边形外角和以及多边形内角和公式，熟练掌握相关公式是解题关键． 8、A【分析】分式的值为1的条件是：（1）分子=1；（2）分母≠1．两个条件需同时具备，缺一不可．据此可以解答本题．【详解】解：由题意可得x-2=1且x+2≠1， 解得x=2． 故选：A ． 【点睛】分式值为1，要求分子为1，分母不为1． 9、A【分析】根据分解因式的定义逐项判断即得答案．【详解】解：A 、10x 2－5x =5x (2x －1)，由左边到右边的变形是分解因式，故本选项符合题意；B 、a (x +y ) =ax +ay ，由左边到右边的变形不是分解因式，故本选项不符合题意；C 、x 2－4x +4=x (x －4)+4，由左边到右边的变形不是分解因式，故本选项不符合题意；D 、x 2－16+3x =(x －4)(x +4)+3x ，由左边到右边的变形不是分解因式，故本选项不符合题意； 故选：A ． 【点睛】本题考查了分解因式的定义，属于基础概念题型，熟知概念是关键． 10、D【分析】设前一半每天读x 页，则后一半每天读（x+5）页，根据“书共240页，两周内归还”列出方程解答即可．【详解】设前一半每天读x 页，则后一半每天读（x+5）页，根据题意得：120120145x x +=+ 故选：D 【点睛】本题考查的是分式方程的应用，能理解题意并分析出题目中的数量关系是关键． 11、C【解析】分析：根据整式的乘法和因式分解的逆运算关系，按多项式乘以多项式法则把式子变形，然后根据p 、q 的关系判断即可.详解：∵(x ＋p)(x ＋q)= x 2＋（p+q ）x+pq= x 2＋mx －12∴p+q=m ，pq=-12.∴pq=1×（-12）=（-1）×12=（-2）×6=2×（-6）=（-3）×4=3×（-4）=-12 ∴m=-11或11或4或-4或1或-1. ∴m 的最大值为11. 故选C.点睛：此题主要考查了整式乘法和因式分解的逆运算的关系，关键是根据整式的乘法还原因式分解的关系式，注意分类讨论的作用. 12、B【分析】根据等腰三角形的性质以及平行线的性质得出112233////.B A A B A B 以及221222A B A B ==，得出231334422, .... 2n n n A B A B A B -===，进而得出答案.【详解】解:∵112A B B ∆ 是等边三角形， ∴111211122,60A B A B A B B A B O =∠=∠=︒， ∵∠O=30°,∴2121290A A B A B O O ∠=∠+∠=︒, ∵11211A B B OA B O ∠=∠+∠, ∴1130O OA B ∠=∠=︒, ∴111211,OB A B A B === 在212Rt A A B 中， ∵22130A A B ∠=︒ ∴221222A B A B ==,同法可得231334422, .... 2n n n A B A B A B -===，∴889A B B ∆的边长为：72128= , 故选:B. 【点睛】本题考查的是等边三角形的性质以及等腰三角形的性质，根据已知得出221222A B A B ==，得出231334422, .... 2n n n A B A B A B -===，进而发现规律是解题关键．二、填空题（每题4分，共24分）13、===【点睛】本题考查了二次根式的乘除运算法则，注意最后结果化成最简二次根式，准确计算是解题的关键．14、有一个三角形的三个内角； 它们和等于180°【解析】试题分析：这个题是考察命题的定义的理解，所以知道题设和结论就可以写出. 考点：命题的定义，定理 15、5或4．【分析】利用非负数的性质求出mn 、，再分情况求解即可．【详解】||30m +﹣， ∴3040m n =-=﹣，，34m n ∴＝，＝，①当mn 、是直角边时，则该直角三角形的斜边5=， ②当4n ＝是斜边时，则斜边为4， 故答案为5或4． 【点睛】本题考查非负数的性质，勾股定理等知识，解题的关键是熟练掌握基本知识，属于中考常考题型． 16、7:6:4；【分析】利用角平分线的性质，可得知△BCO ，△ACO 和△ABO 中BC ，AC 和AB边上的高相等，根据三角形的面积比即为底的比，由此得知结果．【详解】如图，过O 作OD ⊥AB 交AB 于D ，过O 作OE ⊥AC 交AC 于E ，过O 作OF ⊥BC 交BC 于F ，因为点O 为三条角平分线的交点，所以OD=OE=OF ，所以:::1412876::::4:ABO BCO CAO S S S AB BC AC ===．故答案为：7:6:4．【点睛】考查角平分线的性质，学生熟练掌握角平分线到角两边的距离相等这一性质是本题解题关键，利用性质找到面积比等于底的比，从而解题．17、3xy【解析】试题解析：根据题意，得()2234211263.xy y x xy x y xy ---=-++ 故答案为3.xy18、1【分析】因为BC 的垂直平分线为DE ，所以点C 和点B 关于直线DE 对称，所以当点P 和点E 重合时，△ACP 的周长最小，再结合题目中的已知条件求出AB 的长即可．【详解】解：∵P 为BC 边的垂直平分线DE 上一个动点，∴点C 和点B 关于直线DE 对称，∴当点P 和点E 重合时，△ACP 的周长最小，∵∠ACB ＝90°，∠B ＝30°，AC ＝4cm ，∴AB ＝2AC ＝8cm ，∵AP ＋CP ＝AP ＋BP ＝AB ＝8cm ，∴△ACP 的周长最小值＝AC ＋AB ＝1cm ，故答案为：1．【点睛】本题考查了轴对称−最短路线问题、垂直平分线的性质以及直角三角形的性质，正确确定P 点的位置是解题的关键．三、解答题（共78分）19、（1）1x =；（2）18【分析】（1）根据分式方程的解法直接进行求解即可；（2）先对整式进行因式分解，然后整体代入求解即可．【详解】解：（1）33122x x x-+=-- 去分母得：323x x +-=-，整理解得：1x =；经检验1x =是原方程的解；（2）32232a b a b ab ++=()()2222ab a ab b ab a b ++=+， 把3a b +=，2ab =代入求解得：原式=223=18⨯．【点睛】本题主要考查分式方程及因式分解，熟练掌握各个运算方法是解题的关键． 20、x =1.2【分析】根据分式方程的解法去分母、移项、合并同类项、化系数为1，检验即可解答．【详解】解：去分母得：3=2x +3x ﹣3，移项合并得：5x =6，解得：x =1.2经检验x =1.2是分式方程的解．【点睛】本题考查了分式方程的解法，解出后要检验是否是增根．21、（1）∠FGE =58° ；（2）∠EFB =26°.【分析】（1）由题意利用三角形内角和是180°，据此即可求出∠FGE的度数；（2）根据题意利用角平分线的性质得出∠EGD=∠FGE=58°，再利用平行线性质即可得出∠EFB的度数.【详解】解：（1）∵∠EFG=90°，∠E=32°，∴∠FGE=90°-32°=58°；（2）∵GE平分∠FGD，∴∠EGD=∠FGE=58°∵AB∥CD，∴∠EHB=∠EGD=58°，∴∠EFB=∠EHB－∠E=26°.【点睛】本题考查了三角形内角和定理、角平分线的性质以及平行线的判定，解题的关键是牢记“三角形内角和是180°”是解题的关键以及利用三角形内角和定理及角平分线的定义进行分析．22、（1）全校需要强化安全教育的学生约有300名.（2）见详解图.（3）安全意识为“较强”的学生所占的百分比为45%.【分析】（1）根据扇形统计图中意识为“一般"的学生所占比例求出样本,再求出安全意识为“淡薄”、“一般"的学生比例之和,最后用学生总数1200乘以该比例即可. （2）见详解图．（3）得出样本数后求出安全意识为“较强”的学生数,再去比样本数即可.÷=人,【详解】解: （1）1815%120()+÷=,121812025%⨯=人,120025%300所以全校需要强化安全教育的学生约有300名.---=人,（2）12012183654÷=.（3）5412045%安全意识为“较强”的学生所占的百分比为45%.【点睛】本题综合考查了数据统计中扇形统计图与直方图的数据关系,熟练掌握两种统计图,找到数据关系是解答关键.23、（1）见解析；（2）6 【分析】（1）取边AB 的中点E ，连接CE ，得到12==CE BE AB ，再证明CDB CEA ∠=∠，得到CD CE =，问题得证；（2）设AD=x ，DB=5x ，用含x 式子表示出各线段长度，过点C 作CH ⊥AB ，垂足为H ．用含x 式子表示出CH ，根据△ABC 的面积为2，求出x ，问题得解．【详解】解：（1）取边AB 的中点E ，连接CE ．在Rt ABC ∆中， ∴12==CE BE AB ，∴ECB B ∠=∠，∴2CEA ECB B B ∠=∠+∠=∠，∵2CDB B ∠=∠，∴CDB CEA ∠=∠，∴CD CE =，∴12CD AB =，即=2AB CD ．（2）由已知，设AD=x ，DB=5x ，∴6AB x =，132CD AB x ==，∴2DE AE AD x =-=，过点C 作CH ⊥AB ，垂足为H ．∵CD=CE ，∴DH HE x ==，在Rt CDH ∆中，222CH DH CD +=，∴2222922CH CD DH x x x -=-=，∴△ABC 的面积为21622AB CH x ⨯=， 由题意2622x =， ∴66x =， ∴66AB x ==．【点睛】本题考查了直角三角形性质，等腰三角形性质与判定，熟知相关定理，添加辅助线构造等腰三角形是解题关键．24、（1）见解析；（2）见解析【分析】（1）根据正方形的性质结合网格特点作图即可；（2）利用勾股定理结合网格特点作出一个边长为10的正方形即可．【详解】解：（1）如图1中，正方形ABEF 即为所求；（2）如图2中，正方形ABCD 即为所求．【点睛】本题考查作图﹣应用与设计，正方形的性质、勾股定理等知识，解题的关键是熟练掌握基本知识，属于中考常考题型．25、详见解析【分析】（1）根据题中给出的50个数据，从中分别找出5.0＜x≤6.5与6.5＜x≤8.0的个数，进行划记，得到对应的频数，进而完成频数分布表和频数分布直方图． （2）本题答案不唯一．例如：从直方图可以看出：①居民月平均用水量大部分在2.0至6.5之间；②居民月平均用水量在3.5＜x≤5.0范围内的最多，有19户．（3）由于50×60%=30，所以为了鼓励节约用水，要使60%的家庭收费不受影响，即要使30户的家庭收费不受影响，而11+19=30，故家庭月均用水量应该定为5吨．【详解】解：（1）频数分布表如下：分组划记频数2.0＜x≤3.5正正113.5＜x≤5.0195.0＜x≤6.5136.5＜x≤8.0 58.0＜x≤9.5 2合计50频数分布直方图如下：（2）从直方图可以看出：①居民月平均用水量大部分在2.0至6.5之间；②居民月平均用水量在3.5＜x≤5.0范围内的最多，有19户．（3）要使60%的家庭收费不受影响，你觉得家庭月均用水量应该定为5吨，因为月平均用水量不超过5吨的有30户，30÷50=60%．26、y-1x，2【分析】原式中括号中第一项利用完全平方公式展开，第二项利用单项式乘以多项式法则计算，合并后利用多项式除以单项式法则计算得到最简结果，将x与y的值代入计算即可求出值．【详解】解：原式=(x1-2xy+2y1-x1+2xy-8xy)÷2y=(2y1-8xy)÷2y=y-1x，当x=-1，y=1时，原式=1+1=2．【点睛】本题主要考查了整式的化简求值，涉及到的知识有：完全平方公式，单项式乘以多项式，合并同类项，多项式除以单项式等知识．在求代数式的值时，一般先化简，再把各字母的取值代入求值．。
2020-2021年度八年级英语第二学期期中质量检测(附答案和答题卡)
2020-2021年度八年级第二学期期中质量检测英语试题班级______ 姓名______ 座号______ 评分_____(笔试部分）二、语法选择（每小题1分，共10分）三、完形填空（每小题1分，共10分）先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。
I looked at my watch. It was ten to six. There was just ten minutes left beforewe 41 leave for home. Suddenly the earth began to shake. In no time the shake became very 42 . “Earthquake (地震)!” someone shouted. I 43 the others to the door but we could n’t get out. I stayed under a desk, covering my head and neck with my arms. “Will someone save me 44 the building falls down? Is this the end for me?”I kept thinking about that.Several minutes 45 the shake stopped. Two of my workmates tried to open the door again, and they made it! We ran quickly to the street. It was such a(n) 46 that we couldn’t believe our eyes — the street was full of debris (碎片) and broken wood. More and more people came out and many were injured (受伤的). Lots of themdid 47 but look up into the sky in shock.We walked a long way home not saying much. Some were praying (祈祷) and some were crying. 48 in such a situation was difficult. Our phones didn’t work because of the earthquake. So it was 49 to find out if our friends were okay. I had no way of letting my family in China 50 that I was still alive (活着) . I just hoped that they wouldn’t hear about the earthquake until tomorrow.( )41. A. could B. couldn’t C. need D. needn’t ( )42. A. tall B. far C. strong D. easy( )43. A. helped B. allowed C. followed D. waited ( )44. A. since B. while C. until D. if( )45. A. ago B. before C. later D. after( )46. A. mess B. accident C. problem D. mistake ( )47. A. everything B. anything C. something D. nothing ( )48. A. Communication B. Notice C. Discussion D. Report ( )49. A. normal B. impossible C. necessary D. important ( )50. A. feel B. remember C. imagine D. know 四、阅读理解（每小题2分，共30分）ATuesday, Jan. 6, 9:50 p.m.We were sitting in our warm living room. The TV was on, and everything was peaceful. Suddenly the light went on and off for a few times and then went out completely. Then the rain started, and everything went black. We found the flashlight and some candles and went to bed.Wednesday, Jan. 7, 7:30 a.m.My first thought after waking up was that it was pretty cold in my bedroom. Clearly, the power (电力供应) didn’t come back. After one look out of the window, I felt even sadder: it was still raining heavily. The room was becoming colder and colder. We had no idea when the power would come back, so my wife started a fire in the fireplace.Thursday, Jan. 8, 12:30 p.m.The snow started. The poor trees now had to carry the heavy snow. The storm seemed to last (持续) and we had nothing to do but stay at home.Friday, Jan. 9, 6:00 p.m.Still no power. Even though we lit (点燃) a few candles, it was still difficult to do anything in their weak light. I was sitting near several candles, but I had trouble reading.Saturday, Jan. 10, 1:00 p.m.The storm stopped this morning, and I drove my car to look for an open store. The trees along the roads were broken. I only bought the most necessary things: bread, some fruit, more drinking water and batteries (电池) for the flashlight. On my way home, the power came back and people were very happy.根据材料内容选择最佳答案。
2021—2022学年度第二学期期中考试八年级语文试题及答案
2021—2022学年度第二学期期中考试八年级语文试题（考试时间：120分钟试卷满分：150分考试形式：闭卷）一、积累与运用（43分）1．名句默写。
（10分）（1）关关雎鸠，在河之洲。
窈窕淑女，▲。
（《关雎》）（2）蒹葭萋萋，▲。
（《蒹葭》）（3）▲，胡为乎泥中？（《诗经.邶风》）（4）▲，悠悠我心。
（《诗经.郑风》》）（5）气蒸云梦泽，▲。
（杜甫《望洞庭湖赠张丞相》）（6）中无杂树，芳草鲜美▲。
（陶渊明《桃花源记》）（7）《送杜少府之任蜀州》中的“▲，▲”两句，一扫离别的千古愁云，给人以积极向上的力量，表现了诗人乐观旷达的胸襟。
（8）古诗词中有许多描写“雨”的句子，请写出连续的两句：▲，▲。
2．阅读下列文字，按要求完成题目。
（6分）立春过后，大地渐渐从沉睡中苏醒过来。
冰雪溶化，草木méng发，各种花次第开放。
再过两个月，燕子翩．然归来。
不久，布谷鸟也来了。
于是转入炎热的夏季，这是植物yùn 育果实的时期。
到了秋天，果实成熟，植物的叶子渐渐变黄，在秋风中簌簌地落下来。
北雁南飞，活跃在田间草际的昆虫也都销声匿迹．．．．。
到处呈现一片衰草连天的景象，准备迎接风雪栽途的寒冬。
（1）根据拼音写汉字或给加点的字注音。
（3分）ménɡ▲发yùn ▲育翩．▲然（2）选文中有两个错别字，找出来并加以改正。
（2分）▲改为▲▲改为▲（3）加点词“销声匿迹”在文中的意思是：▲。
（1分）3．下列句子中加点成语使用有误的一项是（2分）（▲）A．一年四季，春夏秋冬，周而复始．．．．，这是不以人们的意志为转移的自然规律。
B．这曲子，旋律急促，气势恢弘，当到高潮时，又戛然而止．．．．，让人回味无穷。
C．一旦手中有权就摆出目空一切．．．．，不可一世的架势的人，是不会有好下场的。
D．这次青少年宫组织的国学知识竞赛，试卷题量多、难度大，令我叹为观止．．．．。
4．下列句子没有语病的一项是（2分）（▲）A．考古专家经过20多年的整理、研究和发掘，甘肃大地湾遗址考古取得重大成果。
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【全国百强校】吉林省长春外国语学校2020-2021学年八年级下学期期中考试数学试题学校:___________姓名：___________班级：___________考号：___________一、单选题1．下列计算正确的是（）A=B=C=D3=-2．如图，矩形ABCD的顶点A、C分别在直线a、b上，且a∥b，∠1=60°，则∠2的度数为（）A．30°B．45°C．60°D．75°3．下列方程中，没有实数根的是（）A．x2﹣2x=0 B．x2﹣2x﹣1=0 C．x2﹣2x+1 =0 D．x2﹣2x+2=0 4．下列所述图形中，既是轴对称图形又是中心对称图形的是（）A．等腰三角形B．平行四边形C．正五边形D．矩形5．下表记录了甲、乙、丙、丁四名射击运动员最近几次选拔赛成绩的平均数和方差：根据表中数据，要从中选择一名成绩好且发挥稳定的运动员参加比赛，应选择（）A．甲B．乙C．丙D．丁6．为把我市创建成全国文明城市，某社区积极响应市政府号召，准备在一块正方形的空地上划出部分区域栽种鲜花，如图中的阴影“”带，鲜花带一边宽1m，另一边宽2m，剩余空地的面积为18m2，求原正方形空地的边长xm，可列方程为()A．(x﹣1)(x﹣2)＝18 B．x2﹣3x+16＝0C．(x+1)(x+2)＝18 D．x2+3x+16＝07．如图，四边形ABCD是菱形，AC=8，DB=6，DH⊥AB于H，则DH等于（）A．245B．125C．5 D．48．如图，正方形ABCD的边长为5，点A的坐标为（﹣4，0），点B在y轴上，若反比例函数y＝kx（k≠0）的图象过点C，则该反比例函数的表达式为（）A．y＝3xB．y＝4xC．y＝5xD．y＝6x二、填空题9．方程230x x-=的根为．10．在二次根式√2x+1中，x的取值范围是_________．11．在实数0，−π，√2，−4中，最小的数是__________．12．如图，在▱ABCD中，AB＝3，BC＝5，以点B的圆心，以任意长为半径作弧，分别交BA、BC于点P、Q，再分别以P、Q为圆心，以大于12PQ的长为半径作弧，两弧在∠ABC内交于点M，连接BM并延长交AD于点E，则DE的长为_____．13．在矩形ABCD 中，由9个边长均为1的正方形组成的“L 型”模板如图放置，此时量得CF=3，则BC 边的长度为_____________．14．正方形A 1B 1C 1O ，A 2B 2C 2C 1，A 3B 3C 3C 2…按如图所示放置，点A 1、A 2、A 3…在直线y=x+1上，点C 1、C 2、C 3…在x 轴上，则An 的坐标是________________．三、解答题15．解方程：（1）()x 2x 2x 1-=-（2）2x 3x 20-+=.16．计算：|−√3|+√2×√6+(12)−1−（√2019−√2017）0 17．已知关于x 的方程x 2+ax+a ﹣2=0．若该方程的一个根为1，求a 的值及该方程的另一根．18．阅读下面材料，解答问题：将4个数a 、b 、c 、d 排列成2行2列，记为：|a c b d|，叫做二阶行列式．意义是|a c b d |=ad −bc ．例如：|57 68|=5×8−6×7=−2． （1）请你计算|5√27 √6√8|的值； （2）若|x +13 x 2x +1|=9，求x 的值． 19．如图，网格每个小正方形的顶点叫格点，线段AB 的端点在格点上．按要求以线段AB 为边或对角线，分别在网格中作两个不全等四边形．要求（1）四边形顶点在格点上；（2）四边形为轴对称图形20．在一次社会调查活动中，小华收集到某“健步走运动”团队中20名成员一天行走的步数，记录如下：5640 6430 6520 6798 73258430 8215 7453 7446 67547638 6834 7326 6830 86488753 9450 9865 7290 7850对这20个数据按组距1000进行分组，并统计整理，绘制了如下尚不完整的统计图表：步数分组统计表请根据以上信息解答下列问题：（1）填空：m= ______ ，n= ______ ；（2）补全频数发布直方图；（3）这20名“健步走运动”团队成员一天行走步数的中位数落在______ 组；（4）若该团队共有120人，请估计其中一天行走步数不少于7500步的人数．21．如图，△ABC中，AD是边BC上的中线，过点A作AE∥BC，过点D作DE∥AB，DE与AC、AE分别交于点O、点E，连接EC．（1）求证：AD=EC；（2）当∠BAC=Rt∠时，求证：四边形ADCE是菱形．22．如图所示，折叠矩形ABCD的一边AD，使点D落在BC边上的点F处，已知AB=8，BC=10，（1）求BF的长；（2）求△ECF的面积．23．数学兴趣小组几名同学到商场调查发现，一种纯牛奶进价为每箱40元，厂家要求售价在40～70元之间，若以每箱70元销售平均每天销售30箱，价格每降低1元平均每天可多销售3箱．（1）现该商场要保证每天盈利900元，同时又要使顾客得到实惠，那么每箱售价为多少元？（2）若每天盈利为W元，请利用配方法直接写出每箱售价为多少元时，每天盈利最多．24．如图，矩形ABCD中，AB=5cm，BC=10cm，动点M从点D出发，按折线DCBAD方向以3cm/s的速度运动，动点N从点D出发，按折线DABCD方向以2cm/s的速度运动．点E在线段BC上，且BE=1cm，若M、N两点同时从点D出发，到第一次相遇时停止运动．（1）求经过几秒钟M、N两点停止运动？（2）求点A、E、M、N构成平行四边形时，M、N两点运动的时间；（3）设运动时间为t（s），用含字母t的代数式表示△EMN的面积S（cm2）．参考答案1．B【分析】根据二次根式的运算法则对各选项进行计算，然后判断即可.【详解】解：A. 不是同类二次根式，不能合并，所以A选项错误；B. ==C. ==，所以C选项错误；33=-=，所以D选项错误，故选：B.【点睛】本题考查了二次根式的混合运算，熟练掌握运算法则是解题关键．2．C【解析】试题分析：过点D作DE∥a，∵四边形ABCD是矩形，∴∠BAD=∠ADC=90°，∴∠3=90°﹣∠1=90°﹣60°=30°，∵a∥b，∴DE∥a∥b，∴∠4=∠3=30°，∠2=∠5，∴∠2=90°﹣30°=60°．故选C．考点：1矩形；2平行线的性质.3．D【分析】分别计算各方程的根的判别式的值，然后根据判别式的意义判定方程根的情况即可．【详解】A、△=（﹣2）2﹣4×1×0=4＞0，方程有两个不相等的实数根，所以A选项错误；B、△=（﹣2）2﹣4×1×（﹣1）=8＞0，方程有两个不相等的实数根，所以B选项错误；C、△=（﹣2）2﹣4×1×1=0，方程有两个相等的实数根，所以C选项错误；D 、△=（﹣2）2﹣4×1×2=﹣4＜0，方程没有实数根，所以D 选项正确．故选D ．4．D【解析】【分析】根据轴对称图形和中心对称图形的概念对各选项分析判断即可得解．【详解】解：A 、等腰三角形是轴对称图形，不是中心对称图形，故本选项错误；B 、平行四边形不是轴对称图形，是中心对称图形，故本选项错误；C 、正五边形是轴对称图形，不是中心对称图形，故本选项错误．D 、矩形既是轴对称图形，又是中心对称图形，故本选项正确；故选：D ．【点睛】本题考查了中心对称图形与轴对称图形的概念，轴对称图形的关键是寻找对称轴，图形两部分折叠后可重合，中心对称图形是要寻找对称中心，旋转180度后两部分重合． 5．D【解析】【分析】首先比较平均数，平均数相同时选择方差较小的运动员参加． 【详解】∵==x x x x >乙丁甲丙，∴从乙和丁中选择一人参加比赛，∵22S S >乙丁，∴选择丁参赛，故选D ．【点睛】本题考查了平均数和方差，正确理解方差与平均数的意义是解题关键． 6．A【分析】可设原正方形的边长为xm ，则剩余的空地长为（x ﹣1）m ，宽为（x ﹣2）m ．根据长方形的面积公式方程可列出．【详解】设原正方形的边长为xm，依题意有：（x﹣1）（x﹣2）=18．故选A．【点睛】本题考查了由实际问题抽象出一元二次方程的知识，应熟记长方形的面积公式．另外求得剩余的空地的长和宽是解决本题的关键．7．A【分析】根据菱形性质求出AO＝4，OB＝3，∠AOB＝90°，根据勾股定理求出AB，再根据菱形的面积公式求出即可．【详解】解：∵四边形ABCD是菱形，设AB,CD交于O点，∴AO＝OC，BO＝OD，AC⊥BD，∵AC＝8，DB＝6，∴AO＝4，OB＝3，∠AOB＝90°，由勾股定理得：AB5，∵S菱形ABCD＝12×AC×BD＝AB×DH，∴12×8×6＝5×DH，∴DH＝245，故选A．【点睛】本题考查了勾股定理和菱形的性质的应用，能根据菱形的性质得出S菱形ABCD＝12×AC×BD＝AB×DH是解此题的关键．8．A【详解】解：如图，过点C 作CE ⊥y 轴于E ．在正方形ABCD 中，∵AB =BC ，∠ABC =90°，∴∠ABO +∠CBE =90°．∵∠OAB +∠ABO =90°，∴∠OAB =∠CBE ．∵点A 的坐标为（﹣4，0），∴OA =4．∵AB =5，∴OB =3．在△ABO 和△BCE 中，∵∠OAB =∠CBE ，∠AOB =∠BEC ，AB =BC ，∴△ABO ≌△BCE （AAS ），∴OA =BE =4，CE =OB =3，∴OE =BE ﹣OB =4﹣3=1，∴点C 的坐标为（3，1）．∵反比例函数k y x=（k ≠0）的图象过点C ，∴k =xy =3×1=3， ∴反比例函数的表达式为3y x =． 故选A ．【点睛】本题考查的是反比例函数图象上点的坐标特点，涉及到正方形的性质，全等三角形的判定与性质，反比例函数图象上的点的坐标特征，作辅助线构造出全等三角形并求出点D 的坐标是解题的关键．9．120,?3x x ==.试题分析：x （x －3）=0 解得：1x =0，2x =3．考点：解一元二次方程．10．x ≥−12【解析】【分析】根据二次根式的性质：二次根式的被开方数是非负数，得2x+1≥0．解不等式可得答案.【详解】解：根据题意，得2x+1≥0，解得，x≥-12；故答案是：x≥-12．【点睛】本题考查了二次根式的意义和性质．概念：式子√a （a≥0）叫二次根式．性质：二次根式中的被开方数必须是非负数，否则二次根式无意义．11．-4【解析】【分析】根据正数大于0，0大于一切负数，两个负数绝对值大的反而小判断即可．【详解】解：∵√2＞0，-4＜−π＜0∴-4＜−π＜0＜√2最小的数是-4.故答案为：-4．【点睛】考查实数的比较；用到的知识点为：正数大于0；0大于一切负数；两个负数绝对值大的反而小，注意应熟记常见无理数的约值.12．2．根据作图过程可得得BE平分∠ABC；再根据角平分线的性质和平行四边形的性质可证明∠AEB＝∠CBE，证出AE＝AB＝3，即可得出DE的长．【详解】根据作图的方法得：BE平分∠ABC，∴∠ABE＝∠CBE∵四边形ABCD是平行四边形，∴AD∥BC，AD＝BC＝5，∴∠AEB＝∠CBE，∴∠ABE＝∠AEB，∴AE＝AB＝3，∴DE＝AD﹣AE＝5﹣3＝2；故答案为：2．【点睛】此题考查了平行四边形的性质、等腰三角形的判定．熟练掌握平行四边形的性质，证出AE ＝AB是解决问题的关键．13．7【分析】连接AF，作GH⊥AE于点H，则有AE=EF=HG=4，FG=2，AH=2，根据矩形的性质及勾股定理即可求得【详解】解：由图可知，AE=EF=5，根据勾股定理，易得CE=4，由题可知AE⊥EF，易得△ABE≌△ECF，即BE=CF=3，即BC=3+4=7，故答案为：7【点睛】本题考查了利用矩形的性质和勾股定理及全等三角形的性质求解．14．(21n--1，21n-)【详解】解：∵直线y =x +1和y 轴交于A 1，∴A 1的坐标（0，1），即OA 1=1，∵四边形C 1OA 1B 1是正方形，∴OC 1=OA 1=1，把x =1代入y =x +1得：y =2，∴A 2的坐标为（1，2），同理A 3的坐标为（3，4），…A n 的坐标为（121n --，12n -），故答案为（121n --，12n -）．15．（1）12x =22x = （2）11x =，22x =【解析】【分析】（1）对方程去括号、移项合并同类项，化成一元二次方程的一般形式，把常数项移到等号的右边，再运用配方法求解；（2）先根据2x x +（p+q ）x+pq=(x+p)（+q ）对方程左边进行因式分解，化为两个一元一次方程求解.【详解】（1）去括号：2x -2x=2x-1，移项、合并同类项：2x -4x+1=0，配方得：2(2)3x -=解得12x =22x =；（2）2320x x -+=（x-1）(x-2)=0x-1=0或x-2=0解得11x =，22x =.故答案为（1）12x =22x = （2）11x =，22x =.【点睛】本题考查了用配方法和因式分解法解一元二次方程，能根据方程的特点选择合适的方法并熟练掌握解方程的方法和步骤是关键.16．3√3+1【解析】【分析】根据负整数指数幂a n =1a n （a≠0，n 为正整数），零指数幂的意义a 0=1（a≠0），和实数的运算法则进行计算.【详解】解：|−√3|+√2×√6+(12)−1−（√2019−√2017）0＝√3+2√3+2-1＝3√3+1.故答案为：3√3+1.【点睛】本题主要考查了实数的综合运算能力，是各地中考题中常见的计算题型．解决此类题目的关键是熟练掌握二次根式、绝对值、整数指数幂等考点的运算.17．a=21；另一根为-23． 【解析】 试题分析：将x=1代入方程x 2+ax+a-2=0得到a 的值，再根据根与系数的关系求出另一根；试题解析：将x=1代入方程x 2+ax+a-2=0得，1+a+a-2=0，解得，a=21； 方程为x 2+21x-23=0，即2x 2+x-3=0，设另一根为x 1，则1•x 1=-23，x 1=-23． 考点：1、一元二次方程的解；2、根与系数的关系．18．（1）√2；（2）x 1=2,x 2=−2.【解析】【分析】（1）根据新定义得到|5√27 √6√8|＝5×√8-√6×√27，然后进行二次根式的乘法运算； （2）根据新定义得到（x+1）（2x+1）-3x=9，然后整理后利用直接开平方法解方程．【详解】（1）原式＝5×√8−√6×√27=5×2√2−√6×3√3=10√2−9√2=√2；（2）由题可得：（x+1）（2x+1）﹣3x=9，2x2+3x+1−3x=9，∴2x2=8解得：x1=2,x2=−2.故答案为：（1）√2；（2）x1=2,x2=−2.【点睛】本题通过新定义运算的形式考查了二次根式的混合运算：先把各二次根式化为最简二次根式，再进行二次根式的乘除运算，然后合并同类二次根式．也考查了直接开平方法解一元二次方程．19．见解析，本题答案不唯一.【解析】【分析】利用轴对称图形性质，以及全等四边形的定义，如矩形、正方形都是轴对称图形，根据题意画出图形即可．【详解】解：如图所示，本题答案不唯一.【点睛】本题考查作图-轴对称变换，轴对称图形是按一条直线折叠后重合的图形.解题的关键是理解题意，掌握常见图形的性质，并按要求作图．20．（1）4；1；（2）见解析；（3）B；（4）48.【分析】（1）根据题目中的数据即可直接确定m和n的值；（2）根据（1）的结果即可直接补全直方图；（3）根据中位数的定义直接求解；（4）利用总人数乘以对应的比例即可求解．【详解】解：（1）由记录的数据可知，7500≤x＜8500的有8430、8215、7638、7850这4个，即m=4；9500≤x＜10500的有9865这1个，即n=1．故答案为4；1；（2）如图：（3）由于一共20个数据，其中位数是第10、11个数据的平均数，而第10、11个数据的平均数均落在B组，∴这20名“健步走运动”团队成员一天行走步数的中位数落在B组；故答案为B；（4）120×43120++=48（人），答：估计其中一天行走步数不少于7500步的有48人．故答案为48.【点睛】本题考查读频数分布直方图的能力和利用统计图获取信息的能力．利用统计图获取信息时，必须认真观察、分析、研究统计图，才能作出正确的判断和解决问题．21．（1）见解析；（2）见解析.【分析】（1）先证四边形ABDE是平行四边形，再证四边形ADCE是平行四边形即可；（2）由∠BAC=90°，AD是边BC上的中线，得AD=BD=CD，即可证明.【详解】(1)证明：∵AE∥BC，DE∥AB，∴四边形ABDE是平行四边形，∴AE=BD，∵AD是边BC上的中线，∴BD=DC，∴AE=DC，又∵AE∥BC，∴四边形ADCE是平行四边形.(2) 证明：∵∠BAC=90°，AD是边BC上的中线.∴AD=CD∵四边形ADCE是平行四边形，∴四边形ADCE是菱形.【点睛】本题考查了平行四边形的判定、菱形的判定、直角三角形斜边中线定理.根据图形与已知条件灵活应用平行四边形的判定方法是证明的关键.22．（1）BF=6；（2）6.【解析】【分析】（1）因为点F为点D的折后的落点，所以△AFE≌△ADE，由此可得AF=AD=10cm，在△ABF 中利用勾股定理，可得BF的值，（2）先求出DE的长，进而求出CE的长，利用三角形的面积公式即可求出△ECF的面积．【详解】（1）∵△ADE折叠后的图形是△AFE，∴△AFE≌△ADE∴AD=AF，∠D=∠AFE，DE=EF，∵AD=BC=10，∴AF=AD=10，又∵AB=8，在Rt△ABF中，根据勾股定理，得AB2+BF2=AF2，∴82+BF2=102，∴BF=6；故答案为：6.（2）则可得FC=BC-BF=10-6=4，设EC的长为x，∴DE=（8-x），∵FC=4，在Rt△EFC中，根据勾股定理，得：FC2+EC2=EF2，∴42+x2=（8-x）2，即16+x2=64-16x+x2，化简，得16x=48，∴x=3，故EC=3.∴S△ECF=12EC·FC=12×4×3=6.故答案为：6.【点睛】本题考查了图形对折的问题，在解题时一定要注意，折叠的图形与折叠后的图形全等，此题还考查了勾股定理以及三角形的面积公式的应用．23．（1）当每箱牛奶售价为50元时，平均每天的利润为900元．（2）60元.【分析】（1）根据平均每天销售这种牛奶的利润＝每箱的利润×销售量，设每箱售价为x元，根据“每天盈利900元”列出方程（x-40）[30+3（70-x）]=900 求解即可；（2）根据平均每天销售这种牛奶的利润等于每箱的利润×销售量得到W=（x-40）[30+3（70-x）]，整理后根据二次函数的性质求解.【详解】（1）解：设每箱售价为x元，根据题意得：（x-40）[30+3（70-x）]=900化简得：2x-120x+3500=0解得：x1=50或x2=70（不合题意，舍去）∴x=50答：当每箱牛奶售价为50元时，平均每天的利润为900元．（2）由题意得W=（x-40）[30+3（70-x）]＝-32x+360x-9600()2=3601200x--+∴当售价为每箱牛奶60元时，每天盈利最多．【点睛】本题考查了二次函数的应用：先把二次函数关系式变形成顶点式：y=a（x-k）2+h，当a＜0，x=k时，y有最大值h；当a＞0，x=k时，y有最小值h．也考查了利润的含义．24．（1）经过6 s两点相遇．（2）当点A、E、M、N构成平行四边形时，M、N两点运动的时间为4或4.8s．（3）当0＜t＜53时，S =-3t2+372t；当53≤t＜143时，S=S△EMN=12EM•CD=1 2×（3t-5-1）×5=35-152t；当143＜t≤5时，S= t-35；当5＜t＜6时，S =15-52t．【解析】【分析】（1）由题意可得：M、N两点同时从点D出发，到第一次相遇时共运动了：2（5+10）=30（cm），则可得t=30÷（2+3）=6；（2）由题意知，当点N在AD边上运动，点M在BC边上运动时，点A、E、M、N才可能组成平行四边形，然后设经过t秒，四点可组成平行四边形，①当构成▱AEMN时，10-2t=14-3t，②当构成▱AMEN时，10-2t=3t-14，继而求得答案；（3）分别从当0＜t＜53时，当53t≤＜143时，当143＜t＜5时，当5＜t＜6时，去分析求解即可求得答案．【详解】解：（1）∵矩形ABCD中，AB=5cm，BC=10cm，∴M、N两点同时从点D出发，到第一次相遇时共运动了：2（5+10）=30（cm），∴t=30÷（2+3）=6 （s）答：经过6 s两点相遇．故答案为6s.（2）由题意知，当点N在AD边上运动，点M在BC边上运动时，点A、E、M、N才可能组成平行四边形，设经过t秒，四点可组成平行四边形，①当构成▱AEMN时，10-2t=14-3t，解得t =4；②当构成▱AMEN时，10-2t=3t-14，解得t=4.8；答：当点A、E、M、N构成平行四边形时，M、N两点运动的时间为4s或4.8s．故答案为4s或4.8s．（3）如图（1），当0＜t＜53时，点M在线段CD上，S＝S△EMN =S梯形CDNE-S△DMN-S△CEM=12×（2t+9）×5 -12×2t×3t -12×9×（5-3t）=-3t2+372t；如图（2），当53≤t＜143时，点M在线段CE上，S＝S△EMN=12EM•CD=12×（3t-5-1）×5=35-152t；如图（3），当143＜t＜5时，点M在线段BE上，S＝S△EMN=12ME•CD =12×（3t-14）×5=152t-35；如图（4），当5＜t＜6时，点M、N都在线段AB上，S=S△EMN=12MN•BE=12×（30-2t-3t）×1=15-52t．故答案为当0＜t＜53时，S =-3t2+372t；当53≤t＜143时，S= 35-152t；当143＜t＜5时，S= t-35；当5＜t＜6时，S =15-52t．【点睛】此题考查了矩形的性质．此题难度较大，属于动点题目，解题时注意分类讨论思想、方程思想与数形结合思想的应用．。