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2023年北京市丰台区中考二模英语试题

2023年北京市丰台区中考二模英语试题

2023年北京市丰台区中考二模英语试题学校:___________姓名：___________班级：___________考号：___________一、单项选择1．My brother shared ________ coming holiday plan happily yesterday.A．his B．her C．my D．their2．I often go to Capital Library of China ________ Saturday mornings.A．to B．in C．at D．on 3．There are only 24 days until the final exam, ________ we’d better study harder.A．or B．for C．so D．but 4．—Lily, ________ I use your computer? Mine doesn’t work.— Of course, here you are.A．may B．must C．should D．need 5．—Mum, I broke my dad’s glasses. What should I do?—Tell him the truth, or he will be even ________ with you.A．angry B．angrier C．angriest D．the angriest 6．— ________ is it from your home to the subway station?— Quite near. It’s about 5 minutes’ walk.A．How long B．How often C．How far D．How many 7．The children ________ the house when their mother came home from work.A．will clean B．have cleaned C．are cleaning D．were cleaning 8．—Grandma, do you like your new smart phone?—Of course. I ________ how to download music since I had it.A．learn B．will learn C．learned D．have learned 9．—Alice, please turn down the TV. I ________ a meeting online.—Oh, sorry, Dad.A．have B．had C．am having D．have had 10．—Tom, I want to see a movie this Sunday. Let’s go together.—Ok. I ________ with you if I am free.A．go B．will go C．went D．have gone 11．—Daming, where are Betty and Tony?—They ________ to hang flags in the hall by the head teacher.A．asked B．were asked C．will ask D．will be asked 12．— Jim, do you know ________?— Yes, Grandpa. Let me get it for you.A．where the newspaper is B．how the newspaper isC．where is the newspaper D．how is the newspaper二、完形填空When I was about 12 years old, my friends and I decided that we wanted a pet mouse.everything went terribly wrong.My mum felt that the punishment should fit the crime, so she made me write letters to a few selected relatives. One of them was my uncle who I’d only met a few times when I was a little kid. I wrote a 15 letter detailing my life and listing my interests.My punishment was complete. During the following days I nearly forgot about it, but I suddenly got a 16 from him one day. “How lovely it is to hear from you, “he said, and went on to tell me all about his life in his letter. He’d love to hear about what subjects at school I enjoyed. And so we started a correspondence (通信) that went on for several years.He turned out to be the most attractive man. Then out of the blue, he 17 .My mum heard of the bad news and was sad as they had not really spoken for years.I went upstairs and took out a box of letters, the last one being from just a few days before he had passed. My mum 18 herself reading them and knowing that although she hadn’t been in touch, I had grown 19 to him by writing to him. In fact, I then became friends with his wife, who I also wrote to for many years.I often think about how an act of childhood led to such rich 20 that lasted for many years. It encouraged me to write to lots of other people in fact, and it’s something I keep up with to this day. So, I’d encourage you to put pen to paper and see where it leads. 13．A．paper B．letter C．bill D．card 14．A．shared B．changed C．discovered D．repeated15．A．long B．simple C．boring D．strange 16．A．photo B．reply C．gift D．call 17．A．painted B．noticed C．died D．smiled 18．A．protected B．praised C．enjoyed D．comforted 19．A．close B．patient C．strange D．similar 20．A．advice B．experience C．knowledge D．communication三、阅读匹配信息匹配。

2023年北京市朝阳区中考二模英语试题

2023年北京市朝阳区中考二模英语试题

2023年北京市朝阳区中考二模英语试题学校:___________姓名：___________班级：___________考号：___________一、单项选择1．—Is that your bike,Mike?—No.________is black.A．Mine B．His C．Hers D．Yours 2．We plant trees in the park________spring every year.A．at B．to C．in D．on3．We should do everything to protect the earth,________we’ll lose our home.A．and B．so C．or D．but4．—I can’t find my dictionary.________I use yours?—Sure,here you are.A．Need B．May C．Must D．Should 5．Paper cutting is one of________activities among teenagers.A．popular B．more popular C．most popular D．the most popular 6．—James,________have you been a member of the English club?—For about two years.A．how much B．how long C．how often D．how far 7．My father is a tea lover.He often________tea after supper.A．drinks B．drank C．is drinking D．will drink8．I________you an email as soon as I receive the photos.A．send B．sent C．will send D．have sent9．I saw Lucy in the school hall.She________for her speech at that time.A．prepares B．will prepare C．is preparing D．was preparing 10．Jack________more than10Chinese songs since he came to China.A．learns B．learned C．will learn D．has learned 11．Today,China Daily________by more and more students at school.A．read B．reads C．is read D．was read 12．—Do you know________?—At4o’clock tomorrow afternoon.A．when the parents’meeting will begin B．when will the parents’meeting beginC．when the parents’meeting began D．when did the parents’meeting begin二、完形填空Claire had always been a perfectionist.No matter what she did,whether it was organizing her own birthday party or working on a science project,everything had to be done perfectly to the last detail(细节).If her work did not turn out well,she would get very13for days.When Claire heard about the singing14held by the community center,she was very excited to take part in it.Claire made up her mind to win the first prize.She had never come in second before in any of the competitions she joined.“It must be a15experience!”she thought.As usual,Claire made sure she was well-prepared.Not only did she spend a long time choosing a song,she also put in a lot of effort to sing each note correctly.At the beginning of her show,Claire was doing perfectly fine.However,when she got to the chorus(副歌),for some reason,she could not.16a whole line of the words.Not knowing what to do,Claire just had to pass over that line.17.She was very disappointed in herself and nearly cried.“What a silly18I made!”she thought.In the prize-giving ceremony(仪式),when one of the judges announced that she had taken the second place,Claire couldn’t help crying on stage.Claire’s mother comforted her after the ceremony.She said,“It’s perfectly all right to make mistakes.That’s how we learn.“Claire had never thought of it that way.She dried her tears and agreed.“Maybe it is not that bad to19,“Back home,she placed the cup on the desk in her room.It would20her how mistakes could help her to learn and improve. 13．A．excited B．bored C．upset D．serious 14．A．competition B．club C．party D．team 15．A．strange B．difficult C．wonderful D．common 16．A．create B．remember C．explain D．understand 17．A．completely B．correctly C．possibly D．pleasantly 18．A．deal B．mistake C．promise D．plan 19．A．ask B．sing C．try D．lose20．A．punish B．find C．offer D．remind三、阅读理解Three students had some confusing experiences.Please help them get the information to understand better.Maria:“When I went on a trip to Thailand last year,I found that people there eat food with their right hand.I want to know more.”21Lingling:“I gave my seat to a British old man on the bus,but the man looked a little bit angry and refused to take my seat.I don’t know why.”22Peter:“I first met Judy at the airport on a cold winter morning.It was so cold that I shook Judy’s hand without pulling off my gloves.Am I right to do so?”23A．In China,people are encouraged to give seats to the old,the sick and the disabled on the bus or subway.But in some western countries,some elderly people think you are hurting them if you try to help them without their agreement.B．People in Thailand use their right hand to eat,because they believe that the left hand is unclean. So it’s not proper to use one’s left hand to hold food,touch others or pass objects.Doing so may make them angry.C．Shaking hands is a common way to greet each other.But it is very impolite to shake hands with others when you are wearing gloves.You should take off your gloves first no matter how cold it is. D．When you meet a Chinese man or woman for the first time,you should wait for him or her to offer his or her hand first.Chinese people are not supposed to kiss when they greet each other.Fred had something important to tell his family.Everyone in his family was asked to sit at the dinner table and listen.“I’m going to take part in the Olympics.”he said.“Can a fourth-grader do that?”asked Anna,his younger sister.“I’m not going now.I’ll go when I’m a little older.“Fred shook his head.“I’ve studied how the athletes(运动员)become the best.That is practice.If I practice hard enough,I can’t fail.”“Sounds like a big challenge,”said Dad.“Which sport will you take up?”“I haven’t made up my mind yet,”said Fred.After a month’s practice,Fred got hurt again and again when he tried to find out which sport was for him.He tried different kinds of sport,such as running,jumping,badminton and so on.But at last he stopped practicing.“It’s too difficult.I don’t think I can find a sport right for me,”Fred talked to himself.The following Sunday,the family sat down for dinner as usual.“I’ve decided not to play a sport,”said Fred.Everyone was surprised.“You’re giving up on your Olympic dream?”said Anna.“I didn’t say I was giving up,”said Fred.“I’m still going to the Olympics.”Anna looked puzzled.“How can you go if you don’t do a sport?”Fred held up a book titled Is Sports Medicine the Career for You?“Over the past few weeks, I’ve discovered that athletes need much medical help.So I am going to become a sports doctor. I’ll still go to the Olympics—but as a doctor,not an athlete.”Fred answered confidently.“Now that is another challenge,Fred!”said Dad.“I’m sure you would do as well as you can to realize your dream.”24．After a month’s practice,Fred felt________about choosing a right sport.A．surprised B．difficult C．nervous D．confident 25．Fred wanted to be a sports doctor at last because________.A．he loved reading on sports medicine B．his sister asked him to give up practicing C．his family encouraged him to be a doctorD．he discovered athletes’need from a book 26．Fred’s story mainly tells us that________.A．keeping trying helps us realize our dream B．discussing with family makes adifferenceC．reading books can make us feel happy D．doing sports is good for our healthDo you have trouble trying to create the next big idea?Sometimes the answer isn’t to just force an idea out of your mind.Instead,you might want to try sitting back,relaxing and letting your mind wander(走神). Yes,you heard that correctly.If you are in need of a new idea,try daydreaming.Daydreams allow your mind to run freely and even increase productivity in some cases. Daydreaming develops creativity which is why you have an ah-ha moment and sudden insight about a situation.Daydreaming allows you to uncover thoughts and ideas you did not realize you even had and get the thoughts hidden under the surface.Researchers from the University of California,Santa Barbara,found an association(联系) between daydreaming and creative problem-solving.Their study includes making participants(参与者)first do an“unusual-use task”.They had to try to come up with as many different ways to use an object as they could.Then,the participants chose to do one of the following four things before doing the “unusual-use task”again;complete a difficult task,complete an easy task,take a12-minute break, or skip(跳过)a12-minute break and move right on to the task exercise again.Surprisingly,the group that performed best was the one that completed the easy task.Many participants reported that they were daydreaming while performing the easy task.So the researchers believed that this daydreaming might have helped unlock their creativity.But how could daydreaming help the brain come up with creative ways?The answer is something known as“unconscious thought”.Even when you are not actively working to solve a problem,it is still in the back of your mind.Your brain is still thinking about the problem,but in a much more subtle(不易察觉的)way.When you daydream,your mind is allowed to think in ways it normally would not.Because it is free of control,it can create completely new and out-of-the-box ideas.Great ideas never come easily,but that does not mean you always have to work hard to get them.Feel free to do what you want and let your mind wander.27．The“unusual-use task”included having participants________.A．complete a very simple task B．achieve a very difficult taskC．have a break for12minutes D．find various uses for an object 28．Those who completed the easy task performed best because________.A．they worked harder on the easy taskB．they saved time for the following taskC．they chose to stay away from the difficult taskD．they came up with more ideas while daydreaming29．The words“unconscious thought”in Paragraph6probably mean“________”.A．wander in a subtle way under your controlB．know clearly what you’re thinking and doingC．think about a problem without even knowing itD．stop processing information from the outside world30．The passage mainly tells us that________.A．daydreams are good for people’s well-beingB．daydreaming is a way to improve creativityC．completing tasks is important to creative ideasD．problem-solving skills are important in our livesTen years ago,many people thought that the age of physical books was coming to an end. The objects that had been the companions(伙伴)of millions of readers for hundreds of years were about to disappear.Soon,we’d all be reading on little electronic screens and laughing at the memory of places called“libraries”and“bookshops”.But it seems not true about the idea of the death of the physical books.At least in the UK,as The Guardian noted,sales of e-books are falling while sales of physical books are rising.Moresurprisingly,it’s young people who are buying the most physical books.More than60percent of 16-to-24-year-olds preferred print books to e-books.The most popular reason given was:“I like to hold the product.”Books become very personal objects to lovers of reading.It often starts with the way they get them.Many buyers of books like to write down their names on the inside cover when they’ve bought one.And we carry books around with us everywhere.If there’s a mark made on the pages from coffee or food,it doesn’t matter.These accidents make the book—our book—even more personal.It’s as if readers of physical books make friends with them.Of course,some could say that the devices(设备)on which people read e-books,like Kindles and iPads are also objects that we like.But it isn’t quite the same.A Kindle can hold as many pieces of writing as a whole library.But a story we remember from our time turning its pages in our favourite armchair enters our memory forever.Physical books are as valuable to some readers as photographs of family members.This“friendship”people develop with books isn’t just about feelings.Research has shown that readers remember more information read from physical books than electronic ones.However,there’s no doubt e-books are here to stay.They aren’t simply a“here today,gone tomorrow”thing.But it’s also certain that physical books,which have been in production since the fifteenth century,are here to stay,too.31．The writer probably agrees that________.A．physical books will be no longer made soon B．lovers of physical books are mostly old peopleC．sales of e-books and print books are both rising D．physical books are making acomeback in the UK32．What can we know about physical books?A．Physical books are sure to get more and more popular.B．People develop lasting friendships by reading physical books.C．The readers keep more information in mind with physical books.D．Young people prefer physical books with development of technology.33．What’s the writer’s main purpose in writing this passage?A．To explain why physical books will not disappear soon.B．To suggest that readers read more physical books than e-books.C．To show that people have different kinds of reading preferences.D．To discuss what makes e-books become the companions of readers.四、任务型阅读阅读短文，根据短文内容回答问题。

2023年北京市昌平区中考二模化学试题(含答案)

2023年北京市昌平区中考二模化学试题(含答案)

2023年北京市昌平区中考二模化学试题学校:___________姓名：___________班级：___________考号：___________一、单选题1．空气成分中，体积分数最大的是A．氧气B．氮气C．稀有气体D．二氧化碳2．下列属于非金属元素的是（）A．Mg B．Zn C．Cl D．Ag3．下列物质在氧气中燃烧，火星四射、生成黑色固体的是（）A．铁丝B．红磷C．甲烷D．氢气4．下列气体中，能供给动植物呼吸的是A．H2B．O2C．N2D．CO25．下列物质中，属于纯净物的是A．海水B．食醋C．高锰酸钾D．加碘食盐6．下列物质放入水中，能形成溶液的是A．牛奶B．蔗糖C．面粉D．花生油7．如图所示的图标表示A．禁止烟火B．禁止吸烟C．禁止燃放鞭炮D．禁止堆放易燃物8．下列仪器中不宜用作化学反应容器的是A．试管B．烧杯C．量筒D．集气瓶9．下列净化水的方法中，净化程度最高的是A．吸附B．沉降C．过滤D．蒸馏10．下列生活用品，利用金属导电性的是A．铁锅B．铜导线C．铝箔纸D．银饰品11．下列符号中，表示2个氢原子的是A．H2B．2H C．2H+D．2H212．下列物质性质的表述中，属于化学性质的是A．O2无色无味B．H2O2能分解C．H2难溶于水D．铝呈银白色A．加热液体B．稀释浓硫酸C．取固体粉末D．检查气密性A．A B．B C．C D．D16．下列灭火措施不正确的是A．森林起火，开辟隔离带B．电线老化短路起火、用水浇灭C．炒菜时油锅中的油不慎着火，用锅盖盖灭D．酒精灯洒出的酒精在桌上燃烧，用湿布盖灭17．电解水实验如下图。

下列说法正确的是A．试管b中得到H2B．产生H2与O2的体积比约为1:2 C．该实验说明水是由H2和O2组成D．可用带火星的木条检验生成的O2 18．下列物质敞口放置于空气中，质量会增加的是（）A．食盐水B．浓硫酸C．浓盐酸D．石灰石19．75%的乙醇（C2H5OH）溶液常用作消毒剂。

2024年北京市顺义区中考二模英语试题(教师版)

2024年北京市顺义区中考二模英语试题(教师版)

顺义区2024年初中学业水平考试综合练习(二)英语试卷第一部分本部分共33题，共40分。

在每题列出的四个选项中，选出最符合题目要求的一项。

一、单项填空(每题0.5分，共6分)从下面各题所给的A、B、C、D四个选项中，选择可以填入空白处的最佳选项。

1. Our parents help and support us a lot, so we should be thankful to ________.A. himB. herC. youD. them【答案】D【解析】【详解】句意：我们的父母帮助和支持我们很多，所以我们应该感谢他们。

考查代词词义辨析。

him他；her她；you你；them他们。

根据“Our parents help and support us a lot”可知，此处指感谢我们的父母，所以应用them。

故选D。

2. My best friend Tina will arrive in Beijing ________ 8 o’clock this Saturday.A. inB. onC. atD. to【答案】C【解析】【详解】句意：我最好的朋友蒂娜将于本周六8点到达北京。

考查介词词义辨析。

in在，表示在较长的时间里，如周/月份/季节/年份/世纪等；on在，表示在具体的某一天或某一天的上午或下午；at在，表示在某个具体的时刻；to到。

根据空后的“8 o’clock”可知，此处表示在某个具体的时刻，应用at。

故选C。

3. —Mum, ________ I clean my bedroom at once?—No, you needn’t. You can do it after you finish your homework.A. mustB. needC. canD. should【答案】A【解析】【详解】句意：——妈妈，我必须马上打扫卧室吗？——不，你不必。

你可以在完成家庭作业后再做。

2024年北京市昌平区九年级中考二模数学试题

2024年北京市昌平区九年级中考二模数学试题

2024年北京市昌平区九年级中考二模数学试题一、单选题1．2024年2月5日至25日，人民网连续第23次开展全国两会调查，调查围绕10个领域设置49个候选热词．本次调查广纳民情民意，吸引约6 150 000人次参与，其中6 150 000用科学记数法可以表示为（ ） A ．56.1510⨯B ．66.1510⨯C ．60.61510⨯D ．70.61510⨯2．下列图形中是轴对称图形，但不是中心对称图形的是（ ） A ．B ．C ．D ．3．光线在不同介质中的传播速度是不同的，因此光线从水中射向空气时，要发生折射．由于折射率相同，所以在水中平行的光线，在空气中也是平行的．如图，145,2120∠=︒∠=︒，则34∠+∠=（ ）A ．165︒B ．155︒C ．105︒D ．90︒4．实数a ，b 在数轴上的对应点的位置如图所示，则下列结论中正确的是（ ）A ．bB ．a b <-C ．b a <-D ．0a b +>5．正多边形的一个外角是60︒，那么这个正多边形是（ ） A ．正四边形B ．正六边形C ．正八边形D ．正十边形6．已知关于x 的一元二次方程220x x m -+=有两个实数根，则m 的取值范围是（ ） A ．1m <B ．1m >C ．1m £D ．m 1≥7．在不透明的袋子里有三个除颜色外其它都相同的小球，两个红球，一个黄球，从中随机同时取出两个小球，其中取到一个红球一个黄球的概率为（ ） A ．23B ．56C ．12D ．18．如图，AB 为半圆O 的直径，C ，D 是直径AB 上两点，且AC BD =，过点D 作AB 的垂线交半圆于点E ，2CD DE =．设A D a =，AC b =，DE c =，给出下面三个结论：①2a b c -=；②c ba c=；③a b +=．所有正确结论的序号是（ ）A ．①②B ．①③C ．②③D ．①②③二、填空题9x 的取值范围是． 10．分解因式：3x 2+6xy+3y 2＝． 11．分式方程321x x =-的解是． 12．在平面直角坐标系xOy 中，若点()1,m 和()4,2在反比例函数(0)ky k x=≠图象上，则m =． 13．如图，点P 为O e 外一点，过点P 作O e 的两条切线，切点分别为A ，B ，点C 为优弧AB 上一点，若80P ∠=︒，则ACB =∠°．14．2024年3月12日，是我国的第46个植树节，今年植树节的主题是“共同呵护地球家园，筑造美丽未来”．下表是某地区在植树节期间，不同批次种植杨树的成活率的统计结果，请你估计植树节期间，种植杨树的成活率大约为 （结果保留两位小数）．15．图1是装满红酒的高脚杯示意图，装酒的杯体可看作一个三角形，液面宽度为6cm ，其它数据如图所示，喝掉一部分后的数据如图2所示，此时液面宽度为cm．图1 图216．某学校为丰富学生的课余生活，组织校园篮球赛，初三年级6个班进行单循环比赛（即每班都与其他班比赛一场），每天同时在三个场地各进行一场比赛．已知第一天（2）班与（4）班比赛，第二天（3）班与（5）班比赛，第三天（4）班与（6）班比赛，第四天（2）班与（3）班比赛，那么第三天与（3）班比赛的是班，第五天与（1）班比赛的是班．三、解答题17112sin 4512-⎛⎫-︒+ ⎪⎝⎭18．解不等式组：38312x x x x -≥⎧⎪⎨->⎪⎩①②．19．已知220x x +-=，求代数式212111x x ⎛⎫+÷ ⎪--⎝⎭的值． 20．如图，在四边形ABCD 中，AB CD ∥，AB AD =，对角线AC BD ，交于O ，AC 平分BAD ∠．(1)求证：四边形ABCD 是菱形；(2)过点C 作AB 的垂线交其延长线于点E ，若6BD =，3tan 4OAB ∠=，求CE 的长． 21．如图，初三年级准备制作一个长8.5m 的横幅，横幅内容定为16个字，对横幅的有关数据作如下规定：每个字的字宽是相同的，每两个字之间的字距均相等，边空宽：字宽：字距=，试求横幅字距是多少？3:4:122．在平面直角坐标系xOy中，一次函数y＝kx＋b（k≠0）的图象是由函数y＝2x的图象平移得到，且经过点（1，3）．（1）求这个一次函数的表达式；（2）当x＞1时，对于x的每一个值，函数y＝mx（m≠0）的值大于一次函数y＝kx＋b（k≠0）的值，直接写出m的取值范围．23．4月24日是中国航天日，某校初中部举办了“航天知识”竞赛，每个年级各随机抽取10名学生，统计这部分学生的竞赛成绩，并对成绩进行了收集、整理，分析．下面给出了部分信息．a.初一、初二年级学生得分的折线图b.初三年级学生得分：10，9，6，10，8，7，10，7，3，10c.初一、初二、初三，三个年级学生得分的平均数和中位数如下根据以上信息，回答下列问题：(1)由折线图可知，初一、初二两个年级学生“航天知识”竞赛，成绩更稳定的是__________（填“初一”或“初二”）；(2)统计表中m=__________，n=__________；(3)由于数据统计出现失误，初三年级所调查的10名学生中有一名学生被记录为6分，实际得分为9分，将数据修正后，初三年级所调查的10名学生中以下统计数据发生变化的：__________（写出符合题意的序号）. ①平均数；②中位数；③众数；④方差.24．如图，AB 是O e 的直径，点C 在O e 上，若弦CD 平分ACB ∠，交AB 于点E ，过点C 作O e 的切线CF ，交AB 的延长线于点F ．(1)求证：ECF FEC ∠=∠；(2)连接BD ，若30CDB ∠=︒，2BF =，求O e 半径的长．25．通常把脏衣服用洗衣液清洗后会进行拧干，但由于不可能拧净衣服上的全部污水，所以还需要用清水进行多次漂洗，不断降低衣服中污水的含量．如：把一件存留1斤污水的衣服用10斤清水漂洗后，拧干到仍然存留1斤污水，则漂洗后衣服中存有的污物是原来的111． 某小组决定使用20斤清水，对某件存留1斤污水衣服分别进行漂洗，且每次拧干后的衣服上都存留约1斤的污水．(1)该小组设计了如下两个方案，请你完善方案内容： 方案一：采用一次漂洗的方式.将20斤清水一次用掉，漂洗后该衣服中存有的污物是原来的__________； 方案二：采用两次漂洗的方式.若第一次用14斤清水，第二次用6斤清水，漂洗后该衣服中存有的污物是原来的__________；若在第一次用()020x x <<斤清水，第二次用()20x -斤清水，漂洗后该衣服中存有的污物是原来的__________（用含有x 的代数式表示）；通过计算分析，方案__________（“一”或“二”）的漂洗效果更好.(2)若采用方案二，第一次用__________斤清水，漂洗效果最好，二次漂洗后该衣服中存有的污物是原来的__________．26．在平面直角坐标系xOy 中，()11,M x y ，()22,N x y 是抛物线2(0)y ax bx c a =++>上任意两点，其中12x x <． (1)若抛物线经过点()4,c ， ①求抛物线的对称轴；②当124x x +>时，比较1y ，2y 的大小，并说明理由；(2)设抛物线的对称轴为直线x t =，若存在实数m ，当t m ≤时，1x m =，21x m =+，都有122y y -≥，直接写出a 的取值范围．27．如图，在ABC V 中，B C α∠=∠=，点D 是平面内任意一点（不与点A ，B ，C 重合），将线段AD 绕点A 逆时针旋转2α得到线段AE ，连接BE ，G 为BE 的中点，连接AG ，CD ．(1)如图1，当点D 在AC 边上时， ①根据题意，补全图1； ②直接写出：CDAG=__________； (2)如图2，当点D 在ABC V 内部时，（1）问中CDAG的比值还成立吗？如果成立，请证明你的结论，如果不成立，请说明理由．28．对于平面直角坐标系xOy 中的点P 和图形M ，给出如下定义：将图形M 绕P 顺时针旋转90︒得到图形N ，当图形M 与图形N 有公共点时，我们称点P 是图形M 的“关联点”．已知()0,2A ，()3,1B ．(1)如图1，点P 是线段AB 的“关联点”，在点1(1,0)P ，()20,1P ，()32,3P 中，则满足条件的点是__________；(2)若直线y x b =-+上存在点P ，使点P 为线段AB 的“关联点”，直接写出b 的取值范围； (3)以(),0t 为圆心，1为半径的T e ，若线段AB 上存在点P ，使点P 为T e 的“关联点”，直接写出t 的取值范围．。

2024年北京市海淀区中考二模数学试卷

2024年北京市海淀区中考二模数学试卷

2024年北京市海淀区中考二模数学试卷一、单选题(★) 1. 截至年底，我国人工智能核心产业规模接近亿元，形成了京津冀、长三角、珠三角三大集聚发展区．将用科学记数法表示应为（）A．B．C．D．(★★) 2. 下图是一张长方形纸片，用其围成一个几何体的侧面，这个几何体可能是（）A．圆柱B．圆锥C．球D．三棱锥(★) 3. 五边形的内角和为（）A．B．C．D．(★★) 4. 若，则下列式子一定成立的是A．B．C．D．(★) 5. 如图，实数在数轴上对应的点可能是（）A．点A B．点B C．点C D．点D(★) 6. 如图，，点A在上，以点A为圆心，适当长度为半径画弧，分别交，于点B，C，连接AC，BC．若，则的大小为（）A．B．C．D．(★) 7. 九年级（1）班羽毛球小组共有4名队员，其中两名男生，两名女生．从中随机选取两人，恰好能组成一组混双搭档的概率是（）A．B．C．D．(★★) 8. 某种型号的纸杯如图所示，若将个这种型号的杯子按图中的方式叠放在一起，叠在一起的杯子的总高度为．则与满足的函数关系可能是（）A．B．C．D．二、填空题(★) 9. 若代数式有意义，则实数的取值范围是 __________ ．(★★) 10. 已知是方程的一个根，则实数的值是 _________ ．(★★)11. 如图，在中，分别在边上，．若，，则的值为 __________ ．(★) 12. 在平面直角坐标系中，点，在反比例函数的图象上．若，则满足条件的k的值可以是 __________ （写出一个即可）．(★★) 13. 如图所示的网格是正方形网格，A，B，C是网格线的交点，C在以为直径的半圆上．若点D在上，则 __________ ．(★★) 14. 一组数据的平均数为，方差为．再添加一个数据，得到一组新数据．若记这组新数据的方差为，则 __________ （填“”“”或“”）．(★★) 15. 下表是n与（其中n为自然数）的部分对应值表：n510152025303532根据表格提供的信息，计算的结果为 __________ ．(★★) 16. 在中，为边的中点，为边上一点，连接．给出下面三个命题：①若，则；②若，则；③若，则．上述命题中，所有真命题的序号是 __________ ．三、解答题(★★) 17. 计算：．(★★) 18. 解不等式组：(★★) 19. 已知，求代数式的值．(★★★) 20. 如图，点A，B，C，D在一条直线上，，，四边形是平行四边形．(1)求证：四边形是矩形；(2)若，，求的长．(★★) 21. 我国古代著作《管子·地员篇》中介绍了一种用数学运算获得“宫商角徵羽”五音的方法．研究发现，当琴弦的长度比满足一定关系时，就可以弹奏出不同的乐音．例如，三根弦按长度从长到短排列分别奏出乐音“”，需满足相邻弦长的倒数差相等．若最长弦为个单位长，最短弦为个单位长，求中间弦的长度．(★★) 22. 在平面直角坐标系中，一次函数的图象由函数的图象平移得到，且经过点．(1)求这个一次函数的解析式；(2)当时，对于的每一个值，函数的值与一次函数的值的差大于，直接写出的取值范围．(★★) 23. 一本图鉴中的照片由1开始连续编号，由于装订线脱落，照片散落一地．小云想利用统计学知识估计照片总数，于是从中随机抽取20张照片，将其编号作为样本，数据整理如下：．20张照片的编号：4，8，15，25，34，39，41，48，68，79，85，86，89，91，102，104，110，121，144，147b．20张照片编号的最小值、最大值、平均数和中位数：(1)写出表中m的值；(2)设照片总数为n，所有照片编号分别为1，2，…，n，这n个数的平均数和中位数均为．①利用样本平均数估计全体平均数，可估算出照片的总数为__________．②利用样本中位数估计全体中位数，可估算出照片的总数为__________，小云发现，有一个估算结果不合理，这个不合理的结果是__________（填“”或“”）；(3)小云想到还可使用样本数据的“平均间隔长度”进行估计．在下面的示意图中，用表示随机抽取的20张照片编号从小到大排序，则从0到的平均间隔长度为，从到的平均间隔长度为，直接写出此时估算出照片的总数（结果取整数）．(★★★) 24. 如图，是外一点，分别切于点，与交于点，．(1)求证： 是等边三角形； (2)过点 作的平行线，与的另一个交点为 ，连接．若，求的半径和的值．(★★) 25. 生活垃圾水解法是一种科学处理生活垃圾的技术．有研究表明，在生活垃圾水解过程中添加一些微生物菌剂能够加快原料的水解．某小组为研究微生物菌剂添加量对某类生活垃圾水解率的影响，设置了六组不同的菌剂添加量，分别为，，，，，，每隔测定一次水解率，部分实验结果如下：．不同菌剂添加量的生活垃圾，在水解时，测得的实验数据如下图所示：为提高这类生活垃圾在水解 时的水解率，在这六组不同的菌剂添加量中，最佳添加量为__________ ； ．当菌剂添加量为 时，生活垃圾水解率随时间变化的部分实验数据记录如下：时间0水解率通过分析表格中的数据，发现当菌剂添加量为时，可以用函数刻画生活垃圾水解率y和时间t之间的关系，在平面直角坐标系中画出此函数的图象．结合实验数据，利用所画的函数图象可以推断，当水解时，生活垃圾水解率__________超过（填“能”或“不能”）．根据以上实验数据和结果，解决下列问题：（1）直接写出的值；（2）当菌剂添加量为时，生活垃圾水解率达到所需的时间为小时，当菌剂添加量为时，生活垃圾水解小时的水解率__________（填“大于”“小于”或“等于”）．(★★★★) 26. 在平面直角坐标系中，抛物线的对称轴为，点，，在抛物线上．(1)当时，直接写出m与n的大小关系；(2)若对于，都有，求t的取值范围．(★★) 27. 在中，，，点D在边上（不与点A，C 重合），连接，平移线段，使点B移到点C，得到线段，连接．(1)在图1中补全图形，若，求证：与互余；(2)连接，若平分，用等式表示与之间的数量关系，并证明．(★★★★★) 28. 在平面直角坐标系中，的半径为，是的一条弦，以为边作平行四边形．对于平行四边形和弦，给出如下定义：若边所在直线是的切线，则称四边形是弦的“弦切四边形”．(1)若点，，四边形是弦的“弦切四边形”，在图中画出“弦切四边形”，并直接写出点的坐标；(2)若弦的“弦切四边形”为正方形，求的长；(3)已知图形和图形是弦的两个全等的“弦切四边形”，且均为菱形，图形与不重合．，分别为两个“弦切四边形”对角线的交点，记的长为，直接写出的取值范围．。

2023年北京市朝阳区中考二模道德与法治试题(含答案解析)

2023年北京市朝阳区中考二模道德与法治试题(含答案解析)

2023年北京市朝阳区中考二模道德与法治试题学校:___________姓名：___________班级：___________考号：___________一、单选题1．2023年1月1日，新修订的________正式施行。

该法是维护人民群众参与体育运动权利的法律保障，对于新时代落实全民健身国家战略、加快推进体育强国和健康中国建设具有十分重要的意义。

（）A．《中华人民共和国体育法》B．《中华人民共和国基本医疗卫生与健康促进法》C．《国家体育锻炼标准施行办法》D．《国家学生体质健康标准》2．一名大学生在公交车上大声向乘客自我介绍：“我来这里，不是来推销的。

我的梦想是做一名律师，但我不敢与人交流，以前我总是回避这个问题。

现在我意识到只有多和别人交流，才能更好为正义发声。

”这启示我们（）A．接纳自己，需要扬长避短B．认识自己，他人评价更加客观公正C．挖掘潜能，善于向他人学习D．完善自我，需要战胜困难的勇气3．与如图漫画《换个说法》寓意一致的是（）①只有他人尊重我，我才会尊重他人②换位思考，与人为善，体会他人的感受③温暖的表达可以展现平等待人的良好品质④见贤思齐，共同营造良好的社会风尚A．①③B．①④C．②③D．②④4．某位同学在作文中写道：“如果我们表现不好，老师的脸会立刻变得非常严肃，而当我们马上改正错误，老师的脸又由阴转晴了。

其实，老师的心中装的都是我们。

”老师在评语中写道“无论老师的脸怎么变，对你们的爱永不变。

”从中我们可以感受到（）A．真诚沟通，师生情深B．喜怒哀惧，随心所欲这些活动体现的共同主题是（）A．少年有梦，珍惜青春B．爱护身体，养护精神二、分析说明题16．初中时光即将结束，小宁回顾三年来的点点滴滴、这些镜头十分难忘。

四、分析说明题参考答案：1．A【详解】本题为时政题，解析略。

2．D【详解】本题考查做更好的自己。

D：分析题文，大学生在公交车上向乘客自我介绍，为了能培养和别人交流的勇气，这说明完善自我，需要战胜困难的勇气；D正确；A：材料没有涉及接纳自己，需要扬长避短；A不符合题意；B：材料没有涉及他人评价；B不符合题意；C：材料没有涉及挖掘潜能，善于向他人学习；C不符合题意；故本题选D。

2023年北京市西城区中考二模英语试题

2023年北京市西城区中考二模英语试题

2023年北京市西城区中考二模英语试题学校:___________姓名：___________班级：___________考号：___________一、单项选择1．My sister loves water sports, and swimming is________ favorite.A．her B．his C．my D．your 2．We have an English Corner________7:30 pm every Friday. Anyone can come.A．on B．in C．at D．to 3．Let’s put the cake in the fridge, ________ it may go bad tomorrow.A．but B．or C．and D．so 4．—The experiment looks interesting. _______ I have a try?—Sure. Go ahead, please.A．Must B．Need C．May D．Should 5．—Becca, you look so fit. ________ do you exercise?—I go swimming twice a week.A．How long B．How often C．How soon D．How far 6．The National Stadium can hold 91, 000 people, and it is ________ stadium in Beijing. A．large B．larger C．largest D．the largest 7．—What do you like to do in your free time?—I often ________ museums with my friends.A．visit B．visited C．am visiting D．was visiting 8．If you start a hobby, it ________a new world for you.A．opened B．was opening C．will open D．has opened 9．—What did you do for your class project?—We _________ a wildlife video.A．make B．made C．will make D．are make 10．Many people ____________ us their old books since we started our mini-library. A．give B．gave C．will give D．have given 11．Nowadays, students ________ more chances to take cultural field trips.A．offer B．offered C．are offered D．were offered 12．—Do you know ________ the rope jumping competition?—Yes. Next Friday.A．where will we have B．where we will haveC．when will we have D．when we will have二、完形填空阅读下面的短文，掌握其大意，然后从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。

2023-2024学年北京市门头沟区中考二模英语试卷(含解析)

2023-2024学年北京市门头沟区中考二模英语试卷(含解析)

2023-2024学年北京市门头沟区中考二模英语试卷一、单选题：本大题共12小题，共12分。

1.—David, is this your English book? —No, it isn’t. ________ is in my bag.A. MineB. HisC. HersD. Yours2.—Where shall we meet tomorrow, Linda? —Let’s meet ________ the school gate.A. inB. onC. atD. of3.—________ you sing Beijing Opera, Lingling? —Yes, I can. I started learning it at the age of five.A. CanB. MayC. MustD. Need4.Tom was tired, ________ he decided to go home and have a rest.A. butB. soC. orD. for5.—________ books do you read every month? —Two.A. How manyB. How muchC. How oftenD. How long6.Tanzhe Temple (寺庙) is one of ________ tourist attractions in Mentougou.A. popularB. more popularC. most popularD. the most popular7.As soon as the weather clears up, we ________ out for a hike.A. goB. wentC. will goD. have gonest weekend, my parents and I ________ my grandparents with gardening.A. helpB. helpedC. are helpingD. were helping9.Linda ________ her notes before doing homework every day.A. reviewsB. was reviewingC. will reviewD. has reviewed10.—Amy, what are you doing? —I ________ my project on Chinese history.A. doB. am doingC. was doingD. has done11.The school hall ________ by the students of Class One yesterday.A. cleansB. will cleanC. was cleanedD. will be cleaned12.—Do you remember ________? —On April 3rd last year.A. when we will visit the Science MuseumB. when will we visit the Science MuseumC. when we visited the Science MuseumD. when did we visit the Science Museum二、完形填空：本大题共8小题，共12分。

2024年中考数学二模试卷(北京卷)(全解全析)

2024年中考数学二模试卷(北京卷)(全解全析)

2024年中考第二次模拟考试数学·全解全析第Ⅰ卷选择题一、选择题（共16分，每小题2分）第1~8题均有四个选项，符合题意的只有一个．1．截至2023年6月11日17时，全国冬小麦收获2.39亿亩，进度过七成半，将239000000用科学记数法表示应为（）A ．723.910⨯B ．82.3910⨯C ．92.3910⨯D ．90.23910⨯【答案】B【分析】用科学记数法表示绝对值较大的数时，一般形式为10n a ⨯，其中110a ≤<，n 为整数，且n 比原来的整数位数少1，据此判断即可．【详解】解：8239000000 2.3910=⨯，故选：B ．【点睛】本题考查了科学记数法的表示方法，用科学记数法表示绝对值较大的数时，一般形式为10n a ⨯，其中110a ≤<，n 为整数，且n 比原来的整数位数少1，解题的关键是要正确确定a 和n 的值．2．下列图形中，既是中心对称图形也是轴对称图形的是（）A ．B ．C ．D ．【答案】D【分析】根据轴对称图形与中心对称图形的概念求解即可．【详解】A.既不是轴对称图形，也不是中心对称图形，故此选项不合题意；B.既不是轴对称图形，也不是中心对称图形，故此选项不合题意；C.不是轴对称图形，是中心对称图形，故此项不合题意；D.既是中心对称图形，又是轴对称图形，故此项符合题意．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，图形两部分沿对称轴折叠后可重合；中心对称图形是要寻找对称中心，旋转180度后与原图重合．3．如图，已知70AOC BOD ∠=∠=︒，30BOC ∠=︒，则AOD ∠的度数为()A ．100︒B ．110︒C ．130︒D ．140︒【答案】B 【分析】根据∠AOC 和∠BOC 的度数得出∠AOB 的度数，从而得出答案．【详解】∵∠AOC =70°，∠BOC =30°，∴∠AOB =70°－30°=40°，∴∠AOD =∠AOB +∠BOD =40°+70°=110°．故选：B ．【点睛】本题主要考查的是角度的计算问题，属于基础题型．理解各角之间的关系是解题的关键．4．如图，数轴上的点A 和点B 分别在原点的左侧和右侧，点A 、B 对应的实数分别是a 、b ，下列结论一定成立的是（）A ．0a b +<B ．0b a -<C ．22a b >D ．22a b +<+【答案】D 【分析】依据点在数轴上的位置，不等式的性质，绝对值的意义，有理数大小的比较法则对每个选项进行逐一判断即可得出结论．【详解】解：由题意得：a ＜0＜b ，且a ＜b ，∴0a b +>，∴A 选项的结论不成立；0b a ->，∴B 选项的结论不成立；22a b <，∴C 选项的结论不成立；22a b +<+，∴D 选项的结论成立．故选：D ．【点睛】本题主要考查了不等式的性质，有理数大小的比较法则，利用点在数轴上的位置确定出a ，b 的取值范围是解题的关键．5．若正多边形的内角和是540︒，则该正多边形的一个外角为（）A ．45︒B ．60︒C ．72︒D ．90︒【答案】C【分析】根据多边形的内角和公式()2180n -∙︒求出多边形的边数，再根据多边形的外角和是固定的360︒，依此可以求出多边形的一个外角．【详解】 正多边形的内角和是540︒，∴多边形的边数为54018025︒÷︒+＝，多边形的外角和都是360︒，∴多边形的每个外角360572÷︒＝＝．故选：C ．【点睛】本题主要考查了多边形的内角和与外角和之间的关系，关键是记住内角和的公式与外角和的特征，难度适中．6．已知关于x 的一元二次方程220x x a -+=有两个相等的实数根，则实数a 的值是（）A ．1-B ．1C ．2D ．3【答案】B 【分析】本题考查一元二次方程根与判别式的关系，根据方程有两个相等的实数根，判别式等于0列式求解即可得到答案；【详解】解：∵一元二次方程220x x a -+=有两个相等的实数根，∴2(2)410a --⨯⨯=，解得：1a =，故选：B ．7．不透明的袋子中装有2个红球和3个黄球，两种球除颜色外无其他差别，从中随机摸出一个小球，摸到黄球的概率是（）A ．23B ．34C ．25D ．35【答案】D【分析】根据概率计算公式进行求解即可．【详解】解：∵不透明的袋子里装有2个红球，3个黄球，∴从袋子中随机摸出一个，摸到黄球的概率为33235=+；故选：D ．【点睛】本题考查的是概率公式，熟知随机事件A 的概率P （A ）=事件A 可能出现的结果数与所有可能出现的结果数的商是解答此题的关键．8．如图，点A 、B 、C 在同一条线上，点B 在点A ，C 之间，点D ，E 在直线AC 同侧，AB BC <，90A C ∠=∠=︒，EAB BCD ≌△△，连接DE ，设AB a =，BC b =，DE c =，给出下面三个结论：①a b c +<；②22a b a b +>+；)2a b c +>；上述结论中，所有正确结论的序号是（）A ．①②B ．①③C ．②③D ．①②③【答案】D 【分析】如图，过D 作DF AE ⊥于F ，则四边形ACDF 是矩形，则DF AC a b ==+，由DF DE <，可得a b c +<，进而可判断①的正误；由EAB BCD ≌△△，可得BE BD =，CD AB a ==，AE BC b ==，ABE CDB ∠=∠，则90EBD ∠=︒，BDE △是等腰直角三角形，由勾股定理得，2222BE AB AE a b =+=+，由AB AE BE +>，可得22a b a b +>+，进而可判断②的正误；由勾股定理得222DE BD BE =+，即()2222c a b =+，则()2222c a b a b =⨯+<+，进而可判断③的正误．【详解】解：如图，过D 作DF AE ⊥于F ，则四边形ACDF 是矩形，∴DF AC a b ==+，∵DF DE <，∴a b c +<，①正确，故符合要求；∵EAB BCD ≌△△，∴BE BD =，CD AB a ==，AE BC b ==，ABE CDB ∠=∠，∵90CBD CDB ∠+∠=︒，∴90∠+∠=︒CBD ABE ，90EBD ∠=︒，∴BDE △是等腰直角三角形，由勾股定理得，2222BE AB AE a b =+=+，∵AB AE BE +>，∴22a b a b +>+，②正确，故符合要求；由勾股定理得222DE BD BE =+，即()2222c a b =+，∴()2222c a b a b =⨯+<+，③正确，故符合要求；故选：D ．【点睛】本题考查了矩形的判定与性质，全等三角形的性质，勾股定理，等腰三角形的判定，不等式的性质，三角形的三边关系等知识．解题的关键在于对知识的熟练掌握与灵活运用．第Ⅱ卷非选择题二、填空题（共16分，每小题2分）93x -有意义，则x 可取的一个数是．【答案】如4等（答案不唯一，3x ≥）【分析】根据二次根式的开方数是非负数求解即可．【详解】解：∵式子3x -有意义，∴x ﹣3≥0，∴x ≥3，∴x 可取x ≥3的任意一个数，故答案为：如4等（答案不唯一，3x ≥．【点睛】本题考查二次根式、解一元一次不等式，理解二次根式的开方数是非负数是解答的关键．10．将2327m n n -因式分解为．【答案】()()333n m m +-【分析】先提公因式，再利用平方差公式可进行因式分解．【详解】解：2327m n n-=()239n m -=()()333n m m +-故答案为：()()333n m m +-．【点睛】本题考查了提公因式法、公式法分解因式，掌握平方差公式的结构特征是正确应用的前提．11．方程12131x x =的解为．【答案】x ＝3【分析】根据分式方程的解法解方程即可；【详解】解：去分母得：3x ﹣1＝2x +2，解得：x ＝3，检验：把x ＝3代入得：(x +1)(3x ﹣1)≠0，∴分式方程的解为x ＝3．故答案为：x ＝3．【点睛】本题考查了解分式方程：先将方程两边乘最简公分母将分式方程化为整式方程，再解整式方程，最后需要检验整式方程的解是不是分式方程的解．12．在平面直角坐标系xOy 中，点(A 1-1)y ，，()22B y ，在反比例函数()0y k x =≠的图象上，且12y y >，请你写出一个符合要求的k 的值．【答案】2-（答案不唯一）【分析】由题可知A ，B 在两个象限，根据12y y >得到图象位于二、四象限，即0k <给出符合题意的k 值即可．【详解】由题可知A ，B 在两个象限，∵12y y >，∴反比例函数()0k y k x=≠的图象位于二、四象限，∴0k <，即2k =-，故答案为：2-．【点睛】本题考查反比例函数的图象和性质，熟练掌握反比例函数的性质是解题关键．13．如图，在O 中，AB 是直径，CD AB ⊥，ACD ∠＝60︒，2OD =，那么DC 的长等于.【答案】23【分析】此题考查了圆的垂径定理，勾股定理，圆周角定理；根据垂径定理得到CE DE =， BDBC =，90DEO AEC ∠=∠=︒，利用圆周角定理求出求出260DOE A ∠=∠=︒，得出30ODE ∠=︒，进而根据含30度角的直角三角形的性质，求得1OE =，勾股定理即可得DE ，垂径定理即可求得DC 的长．【详解】解：如图所示，设,AB CD 交于点E ，AB 是直径，CD 丄AB ，CE DE ∴=， BDBC =，90DEO AEC ∠=∠=︒，ACD ∠ =60︒，30A ∴∠=︒，260DOE A ∴∠=∠=︒，30ODE ∴∠=︒，∴112OE OD ==，DE ∴=3，2CD DE ∴==23，故答案为：23．14．如图，《九章算术》是中国古代数学专着，是《算经十书》（汉唐之间出现的十部古算书）中最重要的一种.该著作记载了“买椽多少”问题：“六贯二百一十钱，倩人去买几株椽.每株脚钱三文足，无钱准与一株椽”，大意是：现请人代买一批椽，这批椽的价钱为6210文.如果每株椽的运费是3文，那么少拿一株椽后，剩下的椽的运费恰好等于一株椽的价钱，试问6210文能买多少株椽？（椽，装于屋顶以支持屋顶盖材料的木杆）设这批椽有x 株，根据题意可列分式方程为.【答案】()621031x x-=【分析】根据实际问题列分式方程即可，关键是对“那么少拿一株椽后，剩下的椽的运费恰好等于一株椽的价钱”的理解．【详解】解：由题意可列方程：62103(1)-=x x；故答案为：62103(1)-=x x ．【点睛】本题考查根据题意列分式方程，解题关键是熟练运用单价计算公式：单价=总价÷数量，结合题意即可得出分式方程．15．如图，在矩形ABCD 中，4AB =，5BC =，E 点为BC 边延长线一点，且3CE =．连接AE 交边CD 于点F ，过点D 作DH AE ⊥于点H ，则DH =．【答案】5【分析】利用相似三角形的判定与性质求得线段FC 的长，进而求得DF 的长，利再用勾股定理求出AF 的长，最后根据三角形的面积公式，即可求出DH 的长．【详解】解： 四边形ABCD 为矩形，CD AB ∴∥，4DC AB ==，5AD BC ==，90ADC ∠=︒，EFC EAB ∴∠=∠，E E ∠=∠ ，EFC EAB ∴∽V V ，CE FC EB AB ∴=，3354FC ∴=+，32FC ∴=，52DF DC FC ∴=-=，在Rt ADF V 中，2222555522AF AD DF ⎛⎫=+=+= ⎪⎝⎭，DH AE ⊥ ，1122ADF S AD DF AF DH ∴=⋅=⋅V ，1515552222DH ∴⨯⨯=⨯⨯，5DH ∴=，故答案为：5．【点睛】本题矩形的性质，相似三角形的判定和性质，勾股定理，三角形面积公式，熟练掌握相似三角形的判定和性质是解题关键．16．有黑、白各6张卡片，分别写有数字1至6把它们像扑克牌那样洗过后，数字朝下，如图排成两行，排列规则如下：①左至右，按数字从小到大的顺序排列；②黑、白卡片数字相同时，黑卡片放在左边．将第一行卡片用大写英文字母按顺序标注，第二行卡片用小写英文字母按顺序标注，则白卡片数字1摆在了标注字母的位置，标注字母e 的卡片写有数字．【答案】B ；4【分析】根据排列规则依次确定白1，白2，白3，白4的位置，即可得出答案．【详解】解：第一行中B 与第二行中c 肯定有一张为白1，若第二行中c 为白1，则左边不可能有2张黑卡片，∴白卡片数字1摆在了标注字母B 的位置，∴黑卡片数字1摆在了标注字母A 的位置，；第一行中C 与第二行中c 肯定有一张为白2，若第二行中c 为白2，则a ，b 只能是黑1，黑2，而A 为黑1，矛盾，∴第一行中C 为白2；第一行中F 与第二行中c 肯定有一张为白3，若第一行中F 为白3，则D ，E 只能是黑2，黑3，此时黑2在白2右边，与规则②矛盾，∴第二行中c 为白3，∴第二行中a 为黑2，b 为黑3；第一行中F 与第二行中e 肯定有一张为白4，若第一行中F 为白4，则D ，E 只能是黑3，黑4，与b 为黑3矛盾，∴第二行中e 为白4．故答案为：①B ，②4．【点睛】本题考查图形类规律探索，解题的关键是理解题意，根据所给规则依次确定出白1，白2，白3，白4的位置．三、解答题（共68分，17~22题，每题5分，23~26题，每题6分，27~28题，每题7分）解答应写出文字说明、演算步骤或证明过程．17．（本题5分）计算：()2021112π 3.144cos302-⎛⎫-+--︒+ ⎪⎝⎭【答案】4【分析】先计算特殊角三角函数值，再计算零指数幂，负整数指数幂和化简二次根式，再根据二次根式的加减计算法则求解即可．【详解】解：原式31231442=-++-⨯+1231234=-++-+4=．【点睛】本题主要考查了求特殊角三角函数值，零指数幂，负整数指数幂，化简二次根式等等，熟知相关计算法则是解题的关键．18．（本题5分）解不等式组：352x x +<-⎧⎪⎨-<⎪．【答案】35x <<【分析】先求出每个不等式的解集，再根据夹逼原则求出不等式组的解集即可．【详解】解：221352x x x x +<-⎧⎪⎨-<⎪⎩①②，解不等式①得：3x >，解不等式②得：5x <，∴不等式组的解集为35x <<．【点睛】本题主要考查了解一元一次不等式组，正确求出每个不等式的解集是解题的关键．19．（本题5分）先化简，再求值：21221121x x x x x x --⎛⎫+-÷ ⎪+++，其中31x =-．【答案】2x x --，33-+．【分析】根据分式的混合运算法则进行化简，再代值计算即可．【详解】解：原式22121211(1)x x x x x x ⎛⎫---=+÷ ⎪+++⎝⎭()()22112x x x x x-+=⋅+-()1x x =-+2x x =--，当31x =-时，原式()()3131133=---+=-+．【点睛】本题考查分式的化简求值，二次根式的运算．熟练掌握相关运算法则，正确的进行计算，是解题的关键．20．（本题5分）如图，在ABC 中，60,ACB CD ∠=︒平分ACB ∠，过点D 作DE BC ⊥于点,E DF AC ⊥于点F ，点H 是CD 的中点，连接HE FH 、．(1)判断四边形DFHE 的形状，并证明；(2)连接EF ，若26EF =CD 的长．【答案】(1)菱形，见解析；(2)42【分析】本题考查菱形的性质和判定，关键是利用菱形的判定解答．（1）根据角平分线的性质得出DF DE =，进而利用直角三角形的性质得出FH DH EH ==，进而利用菱形的判定解答即可；（2）根据菱形的性质和含30︒角的直角三角形的性质得出DH ，进而解答即可．【详解】（1）解：四边形DFHE 是菱形，理由如下：CD 平分ACB ∠，过点D 作DE BC ⊥于点E ，DF AC ⊥于点F ，60ACB ∠=︒，DF DE ∴=，30FCD DCE ∠=∠=︒，点H 是CD 的中点，FH CH DH ∴==，EH CH DH ==，FH HE ∴=，30DCE ∠=︒ ，DE CB ⊥，60HDE ∴∠=︒，DHE ∴ 是等边三角形，DE HE DH ∴==，DF DE HE FH ∴===，∴四边形DFHE 是菱形；（2）解：连接EF ，交DH 于点O ，四边形DFHE 是菱形，12OH OD DH ∴==，162OF OE EF ===，EF DH ⊥，60HDE ∠=︒ ，6233OE OD ∴===，2442CD DH OD ∴===．21．（本题5分）已知，图①是一张可以缓解眼睛疲劳的视力远眺回形图，它是由多个大小不等的正方形构成的二维空间平面图，利用心理学空间知觉原理，通过变化图案可不断改变眼睛晶状体的焦距，强烈显示出三维空间的向远延伸的立体图形，调节人们的睫状体放松而保护视力．其中阴影部分是由能够缓解视疲劳的绿色构成，阴影之间的部分是空白区域．某体检中心想定做一张回形图，图②是选取的部分回形图的示意图，其中最大的正方形边长为3m ，且空白区域A B 、两部分的面积相等，若空白区域需要三种不同的护眼浅色贴纸，铺贴用纸费用分别为：A 区域10元2/m ，B 区域15元2/m ，C 区域20元2/m ，铺贴三个区域共花费150元，求C 区域的面积．【答案】25m 【分析】本题考查一元一次方程的应用，设A 区域的面积为m x ，根据题意得出101520(92)150x x x ++-=，解得2x =，再求出C 区域的面积即可．【详解】解：设A 区域的面积为m x ，101520(92)150x x x ++-=，解得2x =，9225-⨯=，答：C 区域的面积是25m ．22．（本题5分）在平面直角坐标系xOy 中，一次函数y kx b =+（0k ≠）的图象经过点()0,1，()2,2-，与x 轴交于点A ．(1)求该一次函数的表达式及点A 的坐标；(2)当2x >时，对于x 的每一个值，函数2y x m =+的值大于一次函数y kx b =+（0k ≠）的值，直接写出m 的取值范围．【答案】(1)112y x =-+，(2,0)A ；(2)4m >-【分析】本题考查了待定系数法求一次函数解析式：掌握待定系数法求一次函数解析式一般步骤是解决问题的关键．也考查了一次函数的性质．（1）先利用待定系数法求出函数解析式为112y x =-+，然后计算自变量为0时对应的函数值得到A 点坐标；（2）当函数y x n =+与y 轴的交点在点A （含A 点）上方时，当0x >时，对于x 的每一个值，函数2y x m =+的值大于函数(0)y kx b k =+≠的值．【详解】（1）解： 一次函数(0)y kx b k =+≠的图象经过点(0,1)，(2,2)-，∴122b k b =⎧⎨-+=⎩，解得121k b ⎧=-⎪⎨⎪=⎩，该一次函数的表达式为112y x =-+，令0y =，得1012x =-+，2x ∴=，(2,0)A ∴；（2）解：当2x >时，对于x 的每一个值，函数2y x m =+的值大于一次函数(0)y kx b k =+≠的值，1212x m x ∴+>-+，4m ∴>-．23．（本题6分）为进一步增强中小学生“知危险会避险”的意识，某校初三年级开展了系列交通安全知识竞赛，从中随机抽取30名学生两次知识竞赛的成绩（百分制），并对数据（成绩）进行收集、整理、描述和分析．下面给出了部分信息．a ．这30名学生第一次竞赛成绩和第二次竞赛成绩得分统计图：b ．这30名学生两次知识竞赛获奖情况相关统计表：参与奖优秀奖卓越奖第一次竞赛人数101010平均数828795第二次竞赛人数21216平均数848793（规定：分数90≥，获卓越奖；85≤分数90<，获优秀奖：分数85<，获参与奖）c ．第二次竞赛获卓越奖的学生成绩如下：90909191919192939394949495959698d ．两次竞赛成绩样本数据的平均数、中位数、众数如下表：平均数中位数众数第一次竞赛m 87.588第二次竞赛90n91根据以上信息，回答下列问题：(1)小松同学第一次竞赛成绩是89分，第二次竞赛成绩是91分，在图中用“○”圈出代表小松同学的点；(2)直接写出,m n 的值；(3)哪一次竞赛中初三年级全体学生的成绩水平较高?请说明你的理由（至少两个方面）．【答案】(1)见详解；(2)88m =，90n =；(3)第二次【分析】（1）根据30名学生第一次竞赛成绩和第二次竞赛成绩得分情况统计图可得横坐标为89，纵坐标为91，即可获得答案；（2）根据平均数和中位数的定义求解即可；（3）根据平均数、众数和中位数的意义解答即可．【详解】（1）解：如图所示；（2）8210871095108830m ⨯+⨯+⨯==，∵第二次竞赛获卓越奖的学生有16人，成绩从小到大排列为：90，90，91，91，91，91，92，93，93，94，94，94，95，95，96，98，其中第1个和第2个数是30名学生成绩中第15和第16个数，∴1(9090)902n =⨯+=，∴88m =，90n =；（3）第二次竞赛，学生成绩的平均数、中位数和众数均高于第一次竞赛，故第二次竞赛中初三年级全体学生的成绩水平较高．【点睛】本题主要考查了众数、平均数、中位数等知识，理解题意，熟练掌握相关知识是解题关键．24．（本题6分）如图，圆内接四边形ABCD 的对角线AC ，BD 交于点E ，BD 平分ABC ∠，BAC ADB ∠=∠．(1)求证DB 平分ADC ∠，并求BAD ∠的大小；(2)过点C 作CF AD ∥交AB 的延长线于点F ．若AC AD =，2BF =，求此圆半径的长．【答案】(1)见解析，90BAD ∠=︒；(2)4【分析】（1）根据已知得出 AB BC =，则ADB CDB ∠=∠，即可证明DB 平分ADC ∠，进而根据BD 平分ABC ∠，得出 AD CD=，推出 BAD BCD =，得出BD 是直径，进而可得90BAD ∠=︒；（2）根据（1）的结论结合已知条件得出，90F ∠=︒，ADC △是等边三角形，进而得出1302CDB ADC ∠=∠=︒，由BD 是直径，根据含30度角的直角三角形的性质可得12BC BD =，在Rt BFC △中，根据含30度角的直角三角形的性质求得BC 的长，进而即可求解．【详解】（1）解：∵BAC ADB∠=∠∴ AB BC =，∴ADB CDB ∠=∠，即DB 平分ADC ∠．∵BD 平分ABC ∠，∴ABD CBD ∠=∠，∴ AD CD=，∴ AB AD BCCD +=+，即 BAD BCD =，∴BD 是直径，∴90BAD ∠=︒；（2）解：∵90BAD ∠=︒，CF AD ∥，∴180F BAD ∠+∠=︒，则90F ∠=︒．∵ AD CD=，∴AD DC =．∵AC AD =，∴AC AD CD ==，∴ADC △是等边三角形，则60ADC ∠=︒．∵BD 平分ADC ∠，∴1302CDB ADC ∠=∠=︒．∵BD 是直径，∴90BCD ∠=︒，则12BC BD =．∵四边形ABCD 是圆内接四边形，∴180ADC ABC ∠+∠=︒，则120ABC ∠=︒，∴60FBC ∠=︒，∴906030FCB ∠=︒-︒=︒，∴12FB BC =．∵2BF =，∴4BC =，∴28BD BC ==．∵BD 是直径，∴此圆半径的长为142BD =．【点睛】本题考查了弧与圆周角的关系，等弧所对的圆周角相等，直径所对的圆周角是直角，含30度角的直角三角形的性质，等边三角形的性质与判定，圆内接四边形对角互补，熟练掌握以上知识是解题的关键．25．（本题6分）兴寿镇草莓园是北京最大的草莓基地，通过一颗颗小草莓，促进了农民增收致富，也促进了农旅融合高质量发展．小梅家有一个草莓大棚，大棚的一端固定在离地面高1m 的墙体A 处，另一端固定在离地面高1m 的墙体B 处，记大棚的截面顶端某处离A 的水平距离为m x ，离地面的高度为m y ，测量得到如下数值：/mx01245/my18311311383小梅根据学习函数的经验，发现y是x的函数，并对y随x的变化而变化的规律进行了探究．下面是小梅的探究过程，请补充完整：(1)在下边网格中建立适当的平面直角坐标系，描出表中各组数值所对应的点(),x y，并画出函数的图象；解决问题：(2)结合图表回答，大棚截面顶端最高处到地面的距离高度为___________m；此时距离A的水平距离为___________m；(3)为了草莓更好的生长需要在大棚内安装补光灯，补光灯采用吊装模式悬挂在顶部，已知补光灯在距离地面1.5m时补光效果最好，若在距离A处水平距离1.5m的地方挂补光灯，为使补光效果最好补光灯悬挂部分的长度应是多少m？（灯的大小忽略不计）【答案】(1)见解析；(2)4；3；(3)为使补光效果最好补光灯悬挂部分的长度应是1.75m．【分析】（1）描点，连线，即可画出函数的图象；（2）结合图表回答，即可解答；（3）利用待定系数法求得抛物线的解析式，令 1.5x=，求得函数值，即可解答．【详解】（1）解：描点，连线，函数的图象如图所示，；（2）解：根据图表知，大棚截面顶端最高处到地面的距离高度为4m ；此时距离A 的水平距离为3m ；故答案为：4；3；（3）解：设抛物线的解析式为2y ax bx c =++，把()01，，813⎛⎫ ⎪⎝⎭，，1123⎛⎫ ⎪⎝⎭，，代入得，18311423c a b c a b c ⎧⎪=⎪⎪++=⎨⎪⎪++=⎪⎩，解得1321a b c ⎧=-⎪⎪=⎨⎪=⎪⎩，∴抛物线的解析式为21213y x x =-++，令 1.5x =，则21331321 3.253224y ⎛⎫=-⨯+⨯+== ⎪⎝⎭，()3.25 1.5 1.75m -=，答：为使补光效果最好补光灯悬挂部分的长度应是1.75m ．【点睛】本题考查二次函数的实际应用，根据点的坐标画出函数图象是解题关键．26．（本题6分）在平面直角坐标系xOy 中，已知抛物线()22230y ax a x a =--≠．(1)求该抛物线的对称轴（用含a 的式子表示）；(2)若1a =，当23x -<<时，求y 的取值范围；(3)已知()121,A a y -，()2,B a y ，()32,C a y +为该抛物线上的点，若()()13320y y y y -->，求a 的取值范围．【答案】(1)直线x a =；(2)45x -≤<；(3)3a >或1a <-【分析】（1）根据对称轴为直线2b x a=-代入求解即可；（2）根据23x -<<，2x =-比3x =距离对称轴远，分别求得1,2x =-时的函数值即可求解；（3）分两种情况讨论132>y y y >和132y y y <<时．【详解】（1）解：∵抛物线解析式为()22230y ax a x a =--≠，∴对称轴为直线2222b a x a a a---===；（2）解：当1a =时，抛物线解析式为2=23y x x --，∴对称轴2122b x a -=-=-=，抛物线开口向上，∴当1x =时，取得最小值，即最小值为212134y =-⨯-=-，∵2x =-离对称轴更远，∴2x =-时取得最大值，即最大值为()()222235y =--⨯--=，∴当23x -<<时，y 的取值范围是45x -≤<；（3）解：∵()()13320y y y y -->，∴13>0y y -，32>0y y -，即132>y y y >；或130y y -<，320y y -<，即132y y y <<，∵抛物线对称轴2222b a x a a a ---===，∴()2,B a y 是抛物线顶点坐标，若132>y y y >，则抛物线开口向上，0a >，()32,C a y +在对称轴的右侧，当()121,A a y -在对称轴右侧时，21+2a a ->，解得：3a >；当()121,A a y -在对称轴左侧时，()21+2a a a a -->-，解得：1a <-，不符合题意；∴a 的取值范围是3a >；若132y y y <<，则抛物线开口向下，a<0，()32,C a y +在对称轴的右侧，当()121,A a y -在对称轴右侧时，21+2a a ->，解得：3a >，不符合题意，当()121,A a y -在对称轴左侧时，()21+2a a a a -->-，解得：1a <-；∴a 的取值范围是1a <-；综上所述：a 的取值范围是3a >或1a <-.【点睛】本题考查了二次函数的性质，熟练掌握二次函数的性质是解题的关键．27．（本题7分）如图，在ABC 中，AB AC =，()24590BAC αα∠=︒<<︒，D 是BC 的中点，E 是BD 的中点，连接AE ．将射线AE 绕点A 逆时针旋转α得到射线AM ，过点E 作EF AE ⊥交射线AM 于点F ．(1)①依题意补全图形；②求证：B AFE ∠=∠；(2)连接CF ，DF ，用等式表示线段CF ，DF 之间的数量关系，并证明．【答案】(1)①见解析；②见解析；(2)CF DF=【分析】（1）①根据题意画出图形即可求解；②连接AD ，则AD BC ⊥于点D ，AD 平分BAC ∠，根据等腰三角形的性质以及三角形内角和定理得出BAD ∠=α，90B α∠=︒-，根据90AEF ∠=︒，得出90AFE α∠=︒-，则B AFE ∠=∠；（2）延长FE 至点H ，使得EH EF =，连接,BH AH ，CF ，倍长中线法证明HBE FDE ≌，进而证明AHB AFC ≌，即可得证．【详解】（1）解：①如图所示，②连接AD ，∵AB AC =，D 是BC 的中点，∴AD BC ⊥于点D ，AD 平分BAC ∠，∵()24590BAC αα∠=︒<<︒∴BAD ∠=α，90B α∠=︒-，∵EF AE ⊥，∴90AEF ∠=︒，90AFE α∠=︒-，∴B AFE ∠=∠；（2）CF DF =；证明如下，延长FE 至点H ，使得EH EF =，连接,BH AH ，CF ，∵E 为BD 的中点，E 为HF 的中点∴,EH EF EB ED ==，又HEB FED ∠=∠，∴HBE FDE ≌()SAS ，∴BH FD =，∵AE HF ⊥，EH EF =，∴AHF △是等腰三角形，则AH AF =，HAE FAE α∠=∠=，，∵2BAC HAF α∠=∠=，∴HAF BAF BAC BAF ∠-∠=∠-∠，即BAH CAF ∠=∠，∴AHB AFC ≌()SAS ，∴CF BH =，∴CF FD =．【点睛】本题考查了等腰三角形的性质与判定，旋转的性质，全等三角形的性质与判定，熟练掌握全等三角形的性质与判定是解题的关键．28．（本题7分）在平面直角坐标系xOy 中，O 的半径为1，对于直线l 和线段AB ，给出如下定义：若将线段AB 关于直线l 对称，可以得到O 的弦A B ''（A '，B '分别为A ，B 的对应点），则称线段AB 是O 的关于直线l 对称的“关联线段”．例如：在图1中，线段AB 是O 的关于直线l 对称的“关联线段”．(1)如图2，点1A ，1B ，2A ，2B ，3A ，3B 的横、纵坐标都是整数．①在线段11A B ，22A B ，33A B 中，O 的关于直线2y x =+对称的“关联线段”是______；②若线段11A B ，22A B ，33A B 中，存在O 的关于直线y x m =-+对称的“关联线段”，则m =______；(2)已知()30y x b b =+>交x 轴于点C ，在ABC 中，3AC =，2AB ．若线段AB 是O 的关于直线()30y x b b =-+>对称的“关联线段”，直接写出b 的最大值和最小值，以及相应的BC 长．【答案】(1)①22A B ；②3或2；(2)b 的最大值为43，17BC =；最小值为23，5BC =【分析】（1）①分别画出线段11A B ，22A B ，33A B 关于直线2y x =+对称线段，运用数形结合思想，即可求解；②从图象性质可知，直线y x m =-+与x 轴的夹角为45°，而线段11A B ⊥直线y x m =-+，线段11A B 关于直线y x m =-+对称线段还在直线11A B 上，显然不可能是O 的弦；线段335A B =，O 的最长的弦为2，得线段33A B 的对称线段不可能是O 的弦，而线段22A B ∥直线y x m =-+，线段222A B =，所以线段22A B 的对称线段22A B ''，且线段222A B ''=，平移这条线段，使其在O 上，有两种可能，画出对应图形即可求解；（2）先表示出33OC b =，b 最大时就是CO 最大，b 最小时就是CO 长最小，根据线段AB 关于直线()30y x b b =-+>对称线段A B ''在O 上，得3A C AC ''==，再由三角形三边关系得A C OA OC A C OA ''''-≤≤+，得当A '为()10，时，如图3，OC 最小，此时C 点坐标为()20，；当A '为()10，时，如图3，OC 最大，此时C 点坐标为()40，，分两种情形分别求解．【详解】（1）解：①分别画出线段11A B ，22A B ，33A B 关于直线2y x =+对称线段，如图，发现线段11A B 的对称线段是⊙O 的弦，∴线段11A B ，22A B ，33A B 中，⊙O 的关于直线2y x =+对称的“关联线段”是11A B ，故答案为：11A B ；②从图象性质可知，直线y x m =-+与x 轴的夹角为45°，∴线段11A B ⊥直线y x m =-+，∴线段11A B 关于直线y x m =-+对称线段还在直线11A B 上，显然不可能是O 的弦；∵线段2233215A B =+=，O 的最长的弦为2，∴线段33A B 的对称线段不可能是O 的弦，线段22A B 是⊙O 的关于直线y x m =-+对称的“关联线段”，而线段22A B ∥直线y x m =-+，线段222A B =，∴线段22A B 的对称线段22A B ''，且线段222A B ''=，平移这条线段，使其在O 上，有两种可能，第一种情况22A B ''、的坐标分别为()()0110，，，，此时3m =；第二种情况22A B ''、的坐标分别为()()1001--，、，此时2m =，故答案为：3或2；（2）已知()30y x b b =-+>交x 轴于点C ，在ABC 中，3AC =，2AB =．若线段AB 是O 的关于直线()30y x b b =-+>对称的“关联线段”，直接写出b 的最大值和最小值，以及相应的BC 长．解：∵直线()30y x b b =-+>交x 轴于点C ，当0y =时，()030x b b =-+>，解得：33x b =∴33OC b =即b 最大时就是OC 最大，b 最小时就是OC 最小，∵线段AB 是O 的关于直线()30y x b b =-+>对称的“关联线段”，∴线段AB 关于直线()30y x b b =-+>对称线段A B ''在⊙O 上，∴3A C AC ''==在A CO ' 中，A C OA OC A C OA ''''-≤≤+∴当A '为()10-，时，如图，OC 最小，此时C 点坐标为()20，，将点C 代入直线3y x b =-+中，得032b=-⨯+解得：23b =，∵点B B '，关于323y x =-+对称∴22125BC B C '==+=，∴当A '为()10，时，如图，OC 最大，此时C 点坐标为()40，，将点C 代入直线3y x b =-+中，得034b=-⨯+解得：43b =，∵点B B '，关于323y x =-+对称∴221417BC B C '==+=，综上b 的最大值为43，17BC =；最小值为23，5BC =．【点睛】本题考查了以圆为背景的阅读理解题，对称轴的性质、一次函数与坐标轴的交点问题，勾股定理，三角形三边关系，解决问题的关键是找出不同情境下的“关联线段”和阅读理解能力．。

2021-2022学年北京市中考物理二模试题附解析

2021-2022学年北京市中考物理二模试题附解析

2021-2022学年北京市中考物理二模试题学校：__________ 姓名：__________ 班级：__________ 考号：__________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一、单选题1．以下关于信息和能源的说法中，正确的是.............................................................. （）A．移动电话是靠电磁波传递信息的B．电子邮件只能传递文字，无论怎样也不能传递照片、语音等信息C．我国煤炭和石油资源很丰富，不需要大力开发新能源D．核电虽比火电清洁、安全、经济，但我国不会发展核电站2．下列现象中涉及到惯性知识的是............................................................................... （）A．行驶在积雪路面上的汽车车轮加上铁链B．树上熟透的苹果，沿竖直方向落下C．在马路上骑自行车不宜太快，防止造成交通事故D．市区禁止机动车鸣笛3．一个物体质量的大小决定于:（）A．物体的形状;B．物体中含物质的多少;C．物体的空间位;置; D．物体的状态.4．下列对某种物质的密度的理解，正确的是（）。

A．物质的密度跟它的质量成正比B．物质的密度跟它的体积成反比C．物质的密度跟质量成正比，同时跟体积成反比D．物质的密度跟它的质量和体积无关5．下图中能反映发电机工作原理的是（）6．关于电与磁的叙述正确的是（）A．由于导体在磁场中运动而产生电流，发电机的电能应来自磁能B．磁场是磁体周围看的见、真实存在的物质C．地磁场的两极与地理的两极互相重合D．通电导线周围有磁场，磁场方向并与电流的方向有关；这种现象叫电流的磁效应7．下列几种情况，符合安全用电原则的是................................................................... （）8．有两只标有“220V 、40W ”、“220V 、100W ”字样的电灯，串联后接入电压是440V 的电路中，那么........................................................................................................................ （ ）A ．两灯的实际电压各为220V ，它们能正常发光B ．“220V40W ”的电灯可能会被烧毁C ．“220V100W ”的电灯可能会被烧毁D ．两灯都可能会被烧毁9．当一只电阻两端的电压增大到原来的2倍时，在相同的时间内，这只电阻消耗的电能就变为原来的............................................................................................................................. （ ）A ．2倍B ．12倍C ．4倍D ．14倍 10．如图所示的四种情景中，符合安全用电原则的是 .................................................... （ ）A ．徒手从输电线上取风筝B ．电灯的开关必须接在零线上C ．家庭电路中导线绝缘层破损D ．三脚插头的“长脚”与用电器的金属外壳相连11．如图所示电路，闭合后滑动变阻器的滑片向左移动，以下说法正确的是 ......... （ ）A ．A 示数变大，V 示数变小B ．A 示数变大，V 示数变大C ．A 示数变小，V 示数变小D ．A 示数变小，V 示数变大12．如图所示，闭合电健，两个灯泡都不亮，电流表指针几乎未动，而电压表指针有明显偏转，该电路的故障可能是 [ ]（）A．电流表坏了或未接好B．从a经过L1到b的电路中有断路C．L2灯丝烧断灯座未接通D．电流表和L1、L2都坏了13．小乐用放大镜看指纹时，觉的指纹的像太小，为使指纹的像大一些，正确的做法是（）A．眼睛和手指不动，让放大镜离手指稍近些B．眼睛和手指不动，让放大镜离手指稍远些C．放大镜和手指不动，让眼睛离放大镜稍近些D．放大镜和手指不动，让眼睛离放大镜稍远些。

北京海淀区2023-2024学年中考二模英语试题含答案

北京海淀区2023-2024学年中考二模英语试题含答案

北京海淀区2023-2024学年中考二模英语试题含答案注意事项:1．答题前，考生先将自己的姓名、准考证号码填写清楚，将条形码准确粘贴在条形码区域内。

2．答题时请按要求用笔。

3．请按照题号顺序在答题卡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，不要折暴、不要弄破、弄皱，不准使用涂改液、修正带、刮纸刀。

Ⅰ. 单项选择1、_______ these dumplings ,Tim．I’m sure you will like them.A．Trying B．Try C．To try D．Tried2、— Would you like some juice or milk?—________ is OK. I don’t mind.A．Either B．Neither C．Both3、Susan her friend’s invitation because of an important meeting.A．took down B．put down C．turned down D．wrote down4、She spoke so that everyone could write down what she said.A．safely B．quickly C．slowly D．friendly5、— Why do you prefer lemons to orange?— Because they taste ________.A．soft B．sour C．sweet D．terrible6、—Did Tom’s pare nts go to the meeting yesterday?--Yes, _______ of them did, but ________ spoke.A．each; none B．both; none C．neither; both D．both; neither7、-Why didn't you cry for help when you were robbed (被抢劫)?-If I opened my mouth, they might find my four gold teeth. That would be ______!A．bad B．much worseC．worst D．the worst8、---Would you mind showing me how to open micro-blog?---Sure.It’s a piece of cake.Do it.A．in the way B．in this way C．by the way D．on the way9、Why don’t we put the piano the wall? That will make the room look bigger.A．through B．against C．over10、About of the earth covered with water, but we have less and less fresh water.A．three-fourth; are B．three-fourths; isC．three-fourth; are D．three-fourths; areⅡ. 完形填空11、Dear Claire,In your letter, you ask me about my favorite festival. It is Spring Festival. It is 1 January or February. For the festival, we do many things and buy many things, so we are always 2 . The 3 of Spring Festival is4 . We wear (穿) new red5 and put up red paper-cuts (窗花). And we put lucky money (压岁钱) in red packets. Boys and girls are always happy those days,6 they can have a good time with7 family, and they can get lucky money from their parents, grandparents, uncles and aunts. What do we8 on Spring Festival? Jiaozi and some fruits. In the evening, the family will watch TV together, but children9 watching TV for 4 hours. It’s really boring for them. They always play with thei r friends.What about you? What 10 do you like best?Your friend,Li Ju1．A．on B．for C．in D．at2．A．tidy B．busy C．healthy D．free3．A．color B．food C．thing D．subject4．A．yellow B．red C．blue D．black5．A．clothes B．jackets C．skirts D．trousers6．A．so B．and C．but D．because7．A．their B．theirs C．they D．them8．A．eat B．watch C．play D．know9．A．like B．want C．don’t like D．don’t want10．A．festival B．food C．sport D．storeⅢ. 语法填空12、Parents are the most important people in our life. They influence our lives in so many ways. They teach us almost everything about living, give us strength of character and make us who we are. It is because of them that we become able to do our duties. The things that we are able to do are actually their gifts to us. Right from taking care of us when we are young to guiding us whenever we need their advice, they are always there by our side.All we can do for them is to give them love and happiness and try to make them feel proud of us. First of all,you need to follow all the good things they taught you when you were very young. It could be about eating healthily or exercising in a regular way, or it could be about helping anyone who needs help.Not make complaints is also a good way. So don't complain about what you don't have. Learn to appreciate (感激) and love what your parents give you; you may not know the struggles they go through in order to giveyou that.Thirdly, you also need to start making your own decisions wisely and confidently. In other words, take controlof your life by deciding what will be good or bad for you. Let them see that you are able to do all kinds of things without asking others for help.More importantly, you should try to be a good person. Be polite and respectful to your family and friends.When they give you advice or a suggestion, you'd better take their ideas into consideration. Try to work as hard as you can and be modest with what you have achieved. Anyway, seeing you grow into a good person will surely make your parents proud.Making your parents feel proud of youWhat your parents can do for you●They teach you how to make a living and develop a strong character.●Your 1．to deal with things is a gift your parents give you.●They are always there to look after you and guide you.2．to make your parents feel proud of youFollow what you were taught.●Develop a healthy habit as your parents toldyou.●Help anyone in need.Don't complain.Appreciate and 3．with all the things givento you by your parents.Make decisions on your4．.Make your own decisions wisely and with 5．to show you are able to deal with everything.Be a good person.●Treat others politely and respectfully.●Listen to your parents' advice.●Work hard and not to be too proud of yourachievements.Ⅳ. 阅读理解A13、Teenager Tony was skiing(滑雪) with his family in the USA when he fell over and lost one of his skis(滑雪板)．His family didn't know that he had a problem.They kept on skiing.When they got to the foot of the mountain, there was no sign of Tony.Tony couldn't find his ski anywhere.In the end, he decided to take off his other ski and walk down the mountain.But he couldn't work out the right way to go.It was now getting dark and it was far from any place of safety.He knew that he might die that night in the cold temperatures.But he kept calm.At home, Tony watched many TV programmes about living in difficult situations.He remembered the advice from these programmes and knew he should build a hole in the snow.He made a hole and pointed it up the hill so the wind couldn't blow into it.Outside it was very cold, but inside Tony was safe from the cold. But he h ad to get down the mountain.The TV programmes always said, “If you are lost, you should find someone else's tracks(轨迹) through the snow and follow them.” So Tony found some ski tracks and followed them.Finally, he found some workers who came to save him.He was safe! His mum was very happy when she heard the news.So, next time someone says that watching TV is a waste of time, think of Tony.Sometimes TV can save your life! 1．Tony's parents didn't know that he was missing until ________．A．some workers found TonyB．they reached the foot of the mountainC．Tony lost one of his skisD．they began to ski down the mountain2．The most important decision Tony made for his safety was________．A．to go skiing with his family in the USAB．to search for the ski that he had lost in the snowC．to build a hole in the snow to keep himself warmD．to take off his other ski and walk down the mountain3．How did Tony get down the mountain?A．He followed his parents.B．He followed some ski tracks.C．He followed the workers.D．He followed some lights.4．Facing the difficulties, Tony was ________．A．calm and cleverB．polite and kindC．outgoing and friendlyD．warm and hard-working5．The passage is mainly about________．A．a happy journey in the USAB．the importance of skiingC．a TV programme about skiingD．how Tony saved himself in the snowB14、Y ou’ve got plenty of emails from your mom，and maybe even a few from dear old grandma. But have you ever received a message from a river?Now，Ireland’s River Lee is sending out much information，thanks to wireless(无线的) technology. In a program called the DEPLOY project，scientists have put some sensors(传感器) in rivers that can find pollution levels.Instead of asking scientists to collect watersamplesseveral times a day，the government can now examine pollution levels in the water，and find out if there is anything polluted entering the river. This makes it much easier for scientists to protect the environment，since problems can be discovered before a serious pollution accident really happens. People in the area can also receive free reports from the river，so that they can find out whether the water is safe for swimming or boating on a certain day. And people can also know if the water is clear enough for them to drink and use. The DEPLOY project has not only started in Ireland，also the same programs have started in thousands of places around the U.S. Now you live in a world in which you could receive information with your mobile phone about environment. The technology should help to make us know more about the pollution that surrounds us—which just might get us all a little more involved with trying to clean up our world.1．（小题1）How do scientists find pollution levels in rivers?A．By putting sensors in rivers.B．By using mobile phones.C．By boating or swimming.D．By surfing the Internet.2．（小题2）The underlined word “samples” in the passage means “_______” in Chinese.A．样品B．有机物C．无机物D．示范3．（小题3）The DEPLOY project is a project that cares for ________.A．weather B．environment C．industry D．study4．（小题4）What can we mainly learn from the fourth paragraph?A．People can receive reports from the riverB．People can find if they can swim in the water.C．The project is good for people’s daily lifeD．People can know if the water is clear enough5．（小题5）Which of the following is TRUE?A．The DEPLOY project has only started in the United States.B．The DEPLOY project tells us how to keep the air and water clean.C．The DEPLOY project helps us live in a world with clear air.D．Y ou can receive information about environment with your phone.C15、Earth Day is on April 22nd．People say thanks to the Earth and learn ways to keep the Earth safe and clean．But saving the Earth is not just for grow-ups．Kids are also taking an active part in it.The American writer and filmmaker Lynne made a film called Young Voices for the Planet．It lists a lot of stories about different kids who help to keep our environment clean.Team Marine, US A group of students at Santa Monica High School started an organization called Team Marine．They tell people why plastic bags are bad for sea animals and environment．In 2011, they successfully made lawmakers （立法者）in their city stop people using plastic bags.Felix, 15, Germany In 2007, a 9-year-old boy, Felix, started a club，Plant for the Planet．It encourages children around the world to plant trees in their own countries．Felix helped plant 25 million trees in Germany and 120 million trees worldwide.Alec, 17, US When he was 12, Alec set up Kids VS Global （全球的）Warming．It teaches kids about weather change and ways to stop the world getting warmer and warmer．Alec travels widely to encourage people to help stop global warming．He has given more than 70 talks across the country.Olivia, 13, US When Olivia was 11, she heard about the 2010 oil spill （漏油）in the Gulf of Mexico．She painted 500 pictures of birds to raise money for the clean-up．She raised more than $200,000 to protect （保护）birds and other wild animals.1．What is the purpose of setting up the “Earth Day” and who can do something for the Earth?A．To keep the earth peaceful and beautiful by adults and kidsB．To keep the earth balanced by adults onlyC．To keep the earth safe and clean by adults and kidsD．To keep the earth safe and clean by kids only2．Young Voices for the Planet made by Lynne is ________.A．a book B．a TV playC．a film D．a club3．According to the passage, we know ________ doesn’t agree to use plastic bags.A．Team Marine B．Felix C．Alec D．Olivia4．Alec travels widely to encourage people to ________.A．raise moneyB．plant treesC．protect wild animalsD．help stop global warming5．The passage is mainly talk about how ________.A．kids are saving the EarthB．parents are planting treesC．students are raising moneyD．grow-ups are using plastics bagsD16、A couple from Russia was once visiting Miami. They wanted to take a walk and to see the city, but they were afraid they might get lost. They did not speak any English.After they left their hotel, they went to the first street corner and looked at the name of the street. Then they carefully copied the name into their notebook. They thought that this would help them find their way back if they got lost.They walked for hours through the city, and suddenly they realized that they were lost. They found a police officer and asked for help, but the officer didn’t speak their native language.After an hour they found a person who could help them. She was an interpreter（翻译）who spoke both their native language and English. They explained that they didn’t know the name of their hotel, but they knew which corner it was on. They showed the interpreter what they had copied into their notebook, and the interpreter began to laugh.The words which they had so carefully copied were “one way street”.1．A couple from Russia was ______ in Miami that day.A．having a walkB．working as volunteersC．traveling by car2．We guess that the couple can speak _______.A．English B．French C．Russian3．The interpreter began to laugh because the couple ________.A．couldn’t s peak EnglishB．made a mistakeC．went a wrong way4．______ helped the couple translate the words they had copied.A．The interpreterB．The hotel ownerC．The police officer5．We know from the story that the couple copied “______” into their notebook. A．the street nameB．way back homeC．one way streetE17、1．The above reading is more probably ___________.A．a poster B．a book reportC．a rain check for a book sale D．a ticket for a big sale2．It’s clear that the 36st book sale begins on ___________.A．October 5, 2012 B．October 4, 2012C．January 31, 2013 D．February 1, 20133．If you want to get some cheapest books, you’d better get to the Needham Public Library _____ A．at 9: 00 am on Oct.4 B．before 4: 00 pm on Oct.4C．at 9: 00 am on Oct.5 D．between 1: 00 and 4: 00 on Oct.54．The reading tells us at 2: 00 pm on Oct.5 you need to pay only ______ for a book with a hardcover. A．50 cents B．25 cents C．1 dollar D．8 dollars5．Which of the following is the best way to get some information for the next book sale?A．To visit the ongoing book sale when the library is open.B．To telephone the manager of the library.C．*******************************************.D．To mark your calendars right now.F18、Daming and Betty always make a timetable for their weekends. The following table is their arrangement for the activities of next weekend.1．Daming won’t next weekend.A．do his lessons B．go shopping C．do sports D．see Betty2．You can ask Betty to help you with your lessons .A．on Saturday morning B．on Saturday eveningC．on Sunday morning D．on Sunday afternoon3．You can on Saturday morning.A．play table tennis with Daming B．go to Ann’s party with BettyC．chat with Daming on the Internet D．see Daming and Betty in the parkⅤ.书面表达19、假如你是李华，作为交换生你去年在美国学习了一学期。

北京市房山区2023年中考二模化学试题

北京市房山区2023年中考二模化学试题

北京市房山区2023年中考二模化学试题1．下列气体中，能供给动植物呼吸的是（）A．H2B．O2C．N2D．CO22．下列不属于．．．新能源的是（）A．煤B．风能C．太阳能D．地热能3．人体缺钙会引起骨质疏松，这里的“钙”指的是（）A．原子B．分子C．元素D．单质4．牙膏中的含氟化合物对牙齿有保护作用。

一种氟原子的原子核内有9个质子和10个中子，该原子的核外电子数为（）A．7 B．9 C．10 D．195．能用于治疗胃酸过多症的物质是（）A．蔗糖B．食盐C．小苏打D．食醋6．下表列出了某饼干的营养成分，其中含量最高的营养素是（）A．蛋白质B．糖类C．油脂D．无机盐7．炒菜时油锅着火，用锅盖盖灭，其灭火原理是（）A．隔绝空气B．清除可燃物C．降低可燃物的着火点D．使可燃物温度降到着火点以下8．6月5日是世界环境日，2023年中国主题为“美丽中国，我是行动者”。

下列做法不符合．．．这一主题的是（）A．外出随手关灯B．减少使用塑料袋C．纸张双面打印D．夏天空调温度调至最低9．将CO2通入下列液体中，能产生白色沉淀的是（）A．水B．稀硫酸C．食盐水D．澄清石灰水10．下列物质含有氢分子的是（）A．H2B．H2O2C．H2SO4D．Ca(OH)211．下列不属于CO2用途的是（）A．灭火B．作燃料C．人工降雨D．气体肥料12．下列物质中，不需密封保存的是（）A．浓硫酸B．氢氧化钠C．大理石D．浓盐酸13．下列物质中，属于氧化物的是（）A．O2B．NaCl C．H2O D．NaOH14．下列化学方程式书写正确的是（）A．CaO+H2O=Ca(OH)2B．2Fe+3H2SO4=Fe2(SO4)3+3H2↑C．2H2O=2H2↑+O2↑D．Na2CO3+Ca(OH)2=CaCO3↓+NaOH15．化学肥料可提高农作物的产量，下列物质能用作钾肥的是（）A．K2SO4B．NH4Cl C．NH4NO3D．Ca(H2PO4)216．下图为尿素[CO(NH2)2]中各个元素质量分数的示意图，其中表示氮元素质量分数的是（）A．①B．②C．③D．④17．土壤的酸碱度会影响植物的生长．下列植物在微酸性土壤中，不适宜种植的是（）A．花生B．苹果C．西瓜D．沙枣18．下列物质常用于改良酸性土壤的是（）A．石灰石B．烧碱C．食盐D．熟石灰19．下列不能．．用于取用固体药品的是（）A．药匙B．镊子C．纸槽D．胶头滴管20．实验室蒸发食盐水，不需要．．．用到的仪器是（）A．蒸发皿B．玻璃棒C．酒精灯D．漏斗21．下列行为不符合．．．实验安全要求的是（）A．熄灭酒精灯时，用灯帽盖灭B．稀释浓硫酸时，将浓硫酸注入水中C．加热液体时，试管口不能对着人D．使用氢氧化钠时，用手直接接触药品22．用如图装置测定空气中氧气的体积分数。

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通州：19. —Sam, is this ____ bag?—Yes, it’s mine.A. youB. yourC. hisD. her20. My father was born ____ September 20th, 1970.A. atB. inC. ofD. on21. Which house is ____, this one or that one?A. bigB. biggerC. biggestD. the biggest22. —____ did you go yesterday? I called you but nobodyanswered.—I went to the museum with my parents.A. HowB. WhyC. WhereD. When23. —____ you say it in English?—Of course, I can.A. MustB. MayC. CanD. Need24. Do you mind ____ the TV a little bit? I’m doing myhomework.A. turning downB. turning offC. turning upD. turning on25. My father ____ a new bike for me if I get the first place.A. buysB. has boughtC. will buyD. bought26. —Where is your brother, Lucy?—He is busy _____ a kite.A. makeB. makesC. to makeD. making27. I like the car very much _____ it’s too expensive for me.A. andB. soC. orD. but28. —When does your mother get up every day?—She ____ up at six.A. getB. getsC. will getD. got29. —Is ____ in the classroom?—Yes. Tom is doing his homework there.A. everybodyB. nobodyC. anybodyD. somebody30. We’ll ask Mr. Wang ____ the students a report onenvironment next week.A. giveB. givesC. givingD. to give31. —Where is your brother?—He is in his room. He ____ his homework since he gothome.A. didB. doesC. is doingD. has done32. An old man ____ by a car when he was crossing the roadyesterday.A. hitB. was hittingC. was hitD. is hit33. —Do you know ____ next week?—Sorry. I don’t know.A. where did they travelB. where they will travelC. where will they travelD. where they traveled34. —You speak English very well!—____.A. Sorry. I don’tB. Yes, you are rightC. You’re welcomeD. Thank you顺义：19. Mr. Black is _____ best friend. He is from America.A. IB. myC. meD. mine20. —What' s that ________ English, do you know?—Football.A. inB. onC. atD. to21. —Are there any ________ on the farm?—Yes, there are some.A. horseB. duckC. sheepD. chicken22. Shanghai is one of __________ cities in our country.A. largeB. largerC. largestD. the largest23. —_______ are you going to the airport , Betty?—Next Monday.A. WhenB. HowC. WhereD. What24. Until now we can just speak a little English, _______ we needmore exercises.A. andB. soC. orD. but25. Look! There _______ some children playing on theplayground.A. isB. areC. hasD. have26. —Excuse me. Read the text louder, please. I ______ hear ou.—Sure.A. mustn'tB. needn'tC. won'tD. can't27. — How was the party last night?—Great! I ____ a good time and met some very nice people.A. haveB. will haveC. hadD. am having28. We ____ the Great Wall tomorrow. Would you like to go withus?A. visitB. visitedC. will visitD. have visited29. Excuse me. I have no idea on my math. Can you tell me________ next?A. what to doB. how to doC. where to doD. when to do30. She raised her voice to make everybody in the room ________her clearly.A. heardB. hearC. to hearD. hearing31. He’ll send us a message as soon as he ____ in Shanghai.A. is arrivingB. will arriveC. arrivesD. arrived32. The students of Class one_______ how to do the experiment inclass yesterday.A. teachB. taughtC. are taughtD. were taught33. Mr Zhang wanted to know ________.A. whether he speaks at the meetingB. when the meeting would startC. what he's going to do at the meetingD. where would the meeting be held34. —I’m flying Hainan Island for my holiday this weekend.—Wonderful! _________.A. Have a good timeB. I hope soC. Why notD. With pleasure.崇文：19. —Is this ruler yours?—No, it’s not ____________. It’s Tony’s.A. IB. meC. myD. mine20. I traveled all night to New York and got there ___________Monday Morning.A. toB. onC. forD. at21. Welcome to R iverside Restaurant. It’s ______________restaurant in the town.A. betterB. goodC. bestD. the best22. —_____ do you go to school every day?—By bike.A. HowB. WhatC. WhereD. Who23. The bus was empty, there was ________ on itA. somebodyB. anybodyC. nobodyD. everybody24. There _______ a computer on the teacher’s desk.A. amB. areC. isD. be25. —________I borrow your calculator?—Of course you can.A. MustB. CanC. ShouldD. Will26. I enjoy _______ television. It’s relaxing.A. watchingB. to watchC. watchD. watched27. He broke his leg last week. The doctor asked him _________ in bed for two weeks.A. to stayB. stayedC. stayingD. stays28. The children will go to the park if it __________ tomorrow.A. won’t rainB. didn’t rainC. doesn’t rainD. isn’t raining29. —How was your weekend in Paris?—Great! We _________ a good time.A．have B．are having C． will have D．had30. ---Would you like to go to the concert with me?---I’d love to, _____I can’t. I have a lot of work to do.A. orB. butC. soD. and31.---- Where is Mr Read?----He ________to the wash room.A. goesB. will goC. was goingD. has gone32. Don’t turn off the radio . I __________ to the news now.A. listenB. have listenedC. listenedD. am listening33.This camera is nice. It _______ in China.A. is madeB. makesC. madeD. make34. —Do you know _____________________ now ?—In the People’s Hospital.A. where is Lin Li’s father workingB. where did Lin Li’s father workC. where Lin Li’s father is workingD. where Lin Li’s father worked 密云：19. Tom and I ____ middle school students. We like school lifevery much.A. isB. amC. areD. was20--- When were you born?--- I was born ___ October, 1988.A. inB. onC. atD. from21.---_____ did you go to the cinema yesterday?--- We went there on foot because it is not very far.A. How manyB. How muchC. How oldD. How22.This is not ____ picture. I think it’s yours.A. himB. herC. youD. me23.He got up quickly_____ went to school without breakfast.A. butB. andC. orD. so24.Don’t make any noise. Grandpa ________ in the room.A. sleepsB. will sleepC. is sleepingD. slept25.Mum, don’t worry about me. I _____ to you as soon as I get toGuangzhou .A. will writeB. writesC. wroteD. has written26. I think our hometown is as _____ as Beijing.A. beautifulB. more beautifulC. most beautifulD. the most beautiful27.My English teacher ______ in this school since 1985 . She is agood teacher.A. teachesB. taughtC. has taughtD. will teach28.A lot of buildings ______ for the Olympic Games in 2008.A. were builtB. can be builtC. are builtD. will be built29. My mother _____ TV when I came back yesterday.A. watchedB. was watchingC. is watchingD. watches30.---Can you tell me _____ the computer?--- Certainly. Let me show it to you.A. how useB. to use howC. to useD. how to use31.When I passed the room ,I heard someone ____ in it.A. laughingB. to laughC. laughedD. laughs32. It’s ____ dark in the room ____ we can’t see anything .A. not; untilB. too; toC. so; thatD. not only; but also33.Could you tell us ______?A. where he livedB. where did he liveC. where he livesD. where does he live34.--- You speak Japanese very well.----______.A. I think soB. No, I don’tC. Thank youD. I hope so宣武：19. — Who’s your English teacher?— Miss Gao. She teaches ________ English very wellA. weB. ourC. oursD. us20. My uncle arrived at the airport ______ the morning of May 3th.A. atB. inC. oD. to21. —________ do you talk to your plant?—Well, I heard that talking to plants is good for them. It canhelp them grow.A. WhyB. WhereC. WhenD. Who22. —I don't know which to buy. Can you give me some advice?—You ___________ try on this T-shirt. It looks nice.A. had not betterB. had better notC. had betterD. had better to23. You should start working harder, ________ you won’t pass thecourse.A. andB. soC. butD. or24. Liu Xiang and Yao Ming are world-famous sports stars.________ of them have set a good example to us.A. AllB. BothC. NeitherD. None25. John is a careful driver and he drives _________ of my friends.A. more carefullyB. the most carefullyC. less carefullyD. the least carefully26. —________ the latest Time magazine ________ yet?—Sorry, it's late. Maybe tomorrow.A. Will, arriveB. Has, arrivedC. Do, arriveD. Did, arrive27. We have worked for three hours. Now let’s stop _________ arest.A. hadB. haveC. to haveD. having28.—Could I have a look at the phone of your family, Sam？—Of course, you ________.A. needB. canC. couldD. must29.—Where ________ the 2010 World Expo (世博会)_______?—In Shanghai.A. does; holdB. is; heldC. will; be heldD. will; hold30.After the discussion, the students asked their teacher _______next.A. what to doB. where to doC. how to doD. which to do31. —Hi, Daniel. Have you finished your math homework?—Not yet. I _________ it tonight.A. finishB. finishedC. have finishedD. am going to finish32. —Haven’t I told you that I don’t like sugar in coffee?—Yes. I _________ less than I usually do.A. was puttingB. putC. will putD. had put33. As soon as he comes back, I’ll tell him when _________ andsee him.A. will you comeB. you will comeC. do you comeD. you come34. —Did you have a good May Day holiday?—___________. We enjoyed ourselves in the Summer Palace.A. I’m not sureB. I hope soC. Of courseD. I’m afraid not延庆：19. This isn’t dictionary. I left mine at home.A. IB. meC. myD. mine20. — Tom, when did you come back ?—December 20.A. ToB. OnC. InD. At21. Mobile phones are very popular now and they are much_______ than before.A. cheapB. cheaperC. cheapestD. the cheapest22. Lisa usually gets to school at 7:45 _____ has the first class at8:00.A. butB. andC. soD. or 23. —students are there in your class?—Forty -one.A. How manyB. How muchC. How longD. How heavy24. —What are the students doing?—Oh, they an English party.A. haveB. hadC. have hadD. are having25. Look! There are pictures on the wall.A. anyB. someC. muchD. both26. Cars, buses and bikes stop when the traffic light is red.A. canB. mustC. mayD. need27. —Linda, you can have the book now. I’ve just finished_______ it.—OK. Thank you.A. readB. readsC. readingD. to read28. — What would you like , tea or coffee?— Tea, please.A. drinkB. to drinkC. drinkingD. drinks29. We a holiday as soon as we finish the work nextweek.A. haveB. hadC. will haveD. are having30. —Where is Jim?—He to the shop. He'll be back in an hour.A. goesB. goC. has goneD. will go31. —John, don’t worry. Let me you.— Thank you very much.A. helpB. to helpC. helpingD. helps32. —Can you read this letter for me?— Sorry. It _______ in French. I can’t read it.A. writesB. wroteC. is writtenD. is writing33. — Did Mr. Bower tell you last year?— No, he didn’t.A. where does he teachB. where he teachesC. where did he teachD. where he taught34. —Hello, may I speak to Steven?—.A. Good ideaB. Help yourselfC. You’re welcomeD. Hold on, please西城：19. There is no doubt that Yao Ming is ______ favourite star.A. usB. weC. ourD. ours20. The story which moved us a lot happened _______ May 12th,2008.A. inB. onC. atD. by21.There was no food in the house, ______ we rang out for apizza.A. becauseB. orC. butD. so22. —Hello, ______ is Mary speaking. Is John there, please?—Hold on, please.A. sheB. thatC. thisD. one23. —Who is the young man in the air force uniform in thepicture?— My brother. He has ______ the army for two years.A. joinedB. leftC. been inD. come to24. If I can run as_____ as Tom, both of us will be chosen to takepart in the sports meeting.A. fastB. fasterC. fastestD. the fastest25. My mother often cooks ______ in many different ways becauseI like them very much.A. chickenB. fishC. beefD. potatoes26.— ______ do you go to Beijing Happy Valley?—Once a year.A. How longB. How oftenC. How farD. How soon27.—I really enjoy _____ the TV play in which Sun Hongleiplayed the hero.—So do I.A. watchB. watchesC. watchingD. watched28. My sister has worked as an engineer since she ______ back from the United States.A. cameB. had comeC. comesD. has come29. We like traveling from one place to _______ to learn aboutdifferent cultures around the world.A. otherB. anotherC. othersD. the others30. —Do you like the magic show by Liu Qian?—Yeah. I think that was ____ performance at CCTV Spring Festival Gala.A. less amazingB. more amazedC. the least amazedD. the most amazing31. People here are very ______. They’re always happy to helpyou.A. carefulB. lonelyC. successfulD. friendly32. ----Excuse me, sir. Could you tell me _______？----At 2:00 p.m.A. where the meeting was heldB. when the meeting will beginC. when did the meeting beginD. where will the meeting be held33. ---John, what was your sister doing while you _____ the piano?---Oh, she ________ with toys.A. played, playedB. played, was playingC. were playing, playedD. were playing, was playing34.—Would you like some more rice?—________.A. Thank you, but I’m fullB. Never mindC. Very well, thank youD. Help yourself朝阳：19. Our English teacher often tells to speak Englishas much as possible.A. weB. usC. ourD. ours20. Lingling came to school 7:30 this morning.A. atB. inC. onD. for21. I took Mr. Li to the hospital this morning, I missed the first class.A. forB. orC. butD. so22. —did you go for your holiday last year?—I went to Shenzhen.A. WhereB. WhenC. HowD. Why23. —Which shirt is , the red one or the yellowone?—The yellow one, of course. It’s only 20 dollars.A. cheapB. cheaperC. cheapestD. the cheapest24. They’re busy ready for the next week’sEnglish test.A. getB. to getC. gettingD. got25. Look, the children kites happily in the park.A. flyB. are flyingC. flewD. will fly26. —Excuse me, must I finish my homework now?—No, you . You can hand it in tomorrow.A. mustn’tB. needn’tC. shouldn’tD. wouldn’t27. The students have kept working for two hours. Ask thema rest, please.A. haveB. hadC. havingD. to have28. I didn’t catch up the first bus yesterday because Itoo late in the morning.A. get upB. will get upC. got upD. have got up29. My mother will go to the supermarket as soon as shewriting the letter.A. finishesB. finishedC. will finishD. was finishing30. Peter has gone to America, but he back in aweek.A. cameB. comesC. will comeD. has come31. Peter in this school since he came to China.A. is workingB. was workingC. will workD. has worked32. Look at the factory! It before I came here.A. is builtB. has builtC. was builtD. was building33. —What did the policeman say to you just now?—He asked when the accident happened.A. what I was doingB. what was IdoingC. what I am doingD. what am Idoing34. —Shall we go out for a walk?—.A. Never mindB. Help yourselfC. You’rewelcome D. Good idea平谷：19. My sister is a teacher , ______ works at a university .A. SheB. HeC. HerD. Him20. Tom often gets up ________ 6:30 am every day.A. inB. onC. toD. at21. There _________ a class meeting next week .A. will haveB. will beC. wasD. is22. Mary is a good student. She studies hard _______ she also likes to help others.A. soB. andC. butD. or23. – _______ I use your mobile phone?–Certainly. Here you are.A. MayB. MustC. ShouldD. Need24. Ann is very friendly , so she has ______ friends in her class .A. fewB. littleC. a fewD. a little25.–__________do you visit your grandmother?–Once a week.A. How manyB. How soonC. How oftenD. How long26. Which do you like _____ , meat, fish or chicken ?A. betterB. moreC. goodD. best27. –What will you do this afternoon?–We _____ trees on a hill.A. will plantB. plantC. are plantingD. have planted28. We’re in class. You’d better not _________.A. talkingB. talkC. talkedD. to talk29. –Where is your brother ,Tom ? I haven’t seen him for several days .–He _________ Shanghai .A.goes toB. has been toC. will go toD. has gone to30. The policeman told the students not ______ football in thestreets.A. playB. playingC.to playD.played31. —When will you tell him the good news?—I will tell him about it as soon as he ____ back.A. cameB. comesC. will comeD.is coming32. —Now computers___________ in many ways.—Yes, they are very useful.A. useB. will useC. are usedD. be used33. — What did Mr. Wang say to you, Mike?— He asked me _______.A. where my father workedB. where myfather will workC. where did my father workD. where will myfather work34. —You look very nice in dark blue.—_____________________.A. I don’t mindB. Thank youC. That’s all rightD. No, not at all燕山：( )19. —When did you arrive in London?—I arrived there _______ the evening of December 6th.A. atB. onC. toD. in( )20. Don’t worry about me. I’ll try ______ best to do it.A. IB. meC. myD. mine( )21. —________ do you surf the Internet?—Twice a month.A. How oftenB. How manyC. WhatD.When( )22. —Will you please ________ the window? It’s very coldtoday.—Sorry!A .open B. to open C. opening D. notopen( )23. I don’t think Tom runs ________ Mike.A. as fast asB. fast thanC. the fastestD. not as fast as( )24. Work hard, ______ you will fall behind others.A. andB. soC. butD. or( )25. —Where is Mike ?—Oh, he _________ his homework in the room.A. doesB. is doingC. didD. has done( )26. —Have you told him the good news?—No. I________ him tomorrow.A. have toldB. will tellC. tellD. told( )27. —Lucy, ask Tom ______ here. I’m waiting for him.—OK.A. comeB. comesC. to comeD.coming( )28. —Whose book is it?—It ______ be Tom’s. He always forgets to write hisname on it.A. mustB. can’tC. mayD.shouldn’t( )29. —Did you go shopping on May 1st?—Yes. _______ too many people in the shop.A. There isB. There areC. There wereD.There was( )30. When I’m on the train, I usually try to find _____ toread.A. anythingB. somethingC. nothingD.everything( )31. —Tom, don’t smoke here. Smoking __________ atschool.A. not allowB. doesn’t allowC. isn’t allowedD. allowed not( )32. —14. My grandma fell asleep while she _______ TV last night.A. watchesB. watchedC. was watchingD. has watched( )33. —Do you know ?—Because she often makes her students happy.A. why so many students like JennyB. why do so many students like JennyC. why did so many students like JennyD. why so many students liked Jenny( )34. We must tell the truth if we ________ something wrong.A. doB. are doingC. will doD. have done 门头沟：19. —Is this your bike ?—No.__________ bike is over there.A. IB. MyC. HeD. His20. The 29th Olympic Games were held __________ August 8th 2008 in Beijing.A. toB. onC. inD. at21. Tony is one of __________ students in his class.A. goodB. betterC. bestD. the best22. Hurry up, __________ you will miss the bus.A. andB. soC.butD. or23.—__________ does Li Ming want to be when he grows up ?— He wants to be a singer.A. WhyB. WhoC. HowD. What24. Mr Smith is very busy with his work. He has________ time to read newspapers.A. littleB. fewC. a littleD. a few25. —__________ I return the book next week ?—No, you needn’t. You can keep it if you like.A. CanB. MayC. MustD. Need26.I had a bad cold. The doctor asked me __________in bed.A. stayingB. to stayC. stayedD.stays27. I enjoy __________ to music . It’s relaxing.A. listenB. listeningC. listenedD. to listen28. —Where is your father?—He __________ to Australia on business.A. goesB. has goneC. wasgoing D. will go29. Mr. Smith __________us a talk on country music next Monday.A. giveB. gaveC. has givenD. will give30. —What were you doing at seven yesterday evening ?— I __________TV with my sister at home.A. watchB. watchedC. was watchingD. werewatching31. —Listen! Who__________the piano in the room ?—Let’s go and see.A.is playingB.playedC.playD.plays32. This famous tower has a long history. It __________ more than300 years ago.A. buildsB. builtC. be builtD. was built33. —Could you let me know __________ yesterday?—Because the traffic was heavy.A. why did you come lateB. why do youcome lateC. why you come lateD. why you camelate34. — Would you like to go out for a walk with us?—__________, but I must finish my homework first.A. Of course notB. T hat’s allrightC. I’d love toD. Yes, I do房山：19. We like Mr. Green because he often tells funnystories in class.A. weB. ourC. usD. ours20. I go to school8 o’clock in the morning.A. atB. inC. onD. of21. My father is very busy with his work. He has _______ time toplay games with me.A. littleB. a littleC. fewD. afew22. I really want to go and play basketball with you, Ihave to finish my homework first.A. andB. butC. orD. so23. —Jim, ________ you speak Japanese?—Yes, only a little.A. mayB. mustC. canD. should24. —do you usually fly kites on Sundays?—In the park.A. WhyB. HowC. WhenD.Where25. I think taking bus in Beijing is much _________ than before.A. cheapB. cheaperC. cheapestD. the cheapest26. All the teachers ask us hard for our future.A. studyB. studiesC. studyingD. to study27. — What are the neighbors doing, Tom?— They a party for their daughter’s birthday.A. haveB. hasC. are havingD. had28. After her father told her a story, she ____________ asleep.A. will fallB. has fallenC. fellD.falls29. ---Would you like to have dinner with me?__Sorry, I’m busy_______ to my familyA. writeB. wroteC. to writeD. writing30. —Jack, would you like to go to see the movie Lion King withme?—It’s an interesting film, but I’m sorry, I _____ it twice.A. seeB. will seeC. have seenD. saw31. I am waiting for my friend to go shopping. If she , I’ll go shopping alone.A. doesn’t comeB. won’t comeC. didn’t comeD. isn’t coming32.—Who’s the little girl in the photo, Susan?—It’s me. This photo _______ when I was five years old.A. takesB. is takenC. tookD. was taken33 Please tell me. I have some good news for him.A. where Robert livesB. where does Robert liveC. where Robert livedD. where did Robert live34. —It’s a fine day, isn’t it? How about going for a picnic?—.A. You’re welcomeB. Thank you very muchC. That’s a good ideaD. It doesn’t matter昌平：19. Will you show _____ your new watch, Tom?A. weB. usC. ourD. ours20. Lily loves her grandparents. She often visits them _____ Sunday.A. onB. inC. atD. from21. --- _____ you read the words in the newspaper?--- No, I can’t. They are too small.A. MustB. MayC. CanD. need22. Zhang Hong is good at English, _____ she often helps us with it.A. andB. butC. orD. that23. --- Did you have a good time during the Duanwu Festival holidays?--- Yes, we _____ many interesting things in the History Museum.A. seeB. sawC. seesD. willsee24. --- _____ did you understand the dialogue?--- I looked up all the new words beforehand.A. HowB. WhatC. WhenD.Which25. Tom _____ to the south with his parents next month.A. goB. goesC. will goD. went26. Who does ______ housework in your home, you or yourparents?A. muchB. moreC. mostD.the most27. --- ____ you ____ your composition, Daming?--- Yes, I have. I did it at school.A. Do, finishB. Did, finishC. Will, finishD. Have,finished28. Do you remember the saying? ―It’s never too late ______.‖A. learnB. learnsC. learningD. tolearn29. --- ______ you ever ____ to Beijing Olympic Park?--- Yes.A. Have, beenB. Has, beenC. Have, goneD. Has gone30. She has spent too much time _____ math.A. studyingB. studyC. studiedD.to study31. _____ turn off the TV yet. We’ll watch the World Cup match.A. NotB. Don’tC. Didn’tD.Won’t32. They wanted to know ____ 1,600 words a soon as they could.A. how can they learnB. how they can learnC. how could they learnD. how they could learn33. This tower bridge _____ three years ago. It is a nice view atnight.A. buildB. was builtC. is builtD. hasbeen built34. --- Will you help me with my math this afternoon, Susan?--- _____.A. Sorry to hear that.B. You’re welcome.C. It’s good to see you.D. Sure. I’m glad to.怀柔：19．—May I borrow your dictionary?—Sorry. This is not ___dictionary.It's Elsa's.A.IB. meC. myD.mine20. He is waiting for his uncle __ the bus stop.A. inB. atC. onD.by21. The English novel is quite easy for you. There are ___ newwords in it.A. a littleB. littleC. a fewD. few22. Hold on to your dreams, ___ one day they may just come true.A. andB. butC. soD. or23. It's getting late. I __ go home now.A. canB. mustC. mayD. need24. —＿＿＿will you be back to China?— In two month.A. How longB. How farC. How oftenD. How soon25. It’s hard to keep the house ___ with three kids.A. cleanB. to cleanC. cleanedD. cleaning26. —Mary, could you help me?—Wait a moment. I ______dinner.A. cookB. cookedC. was cookingD. am cooking27.John is _____ student in our class.A. goodB. betterC. bestD. the best28. There ____ a talk show on CCTV-4 at nine this evening.A.will haveB. is going to beC. is going to haveD. ishaving29. —Where’s Mr Yu, do you know?—Well, it’s hard to say. But I heard him ___ loudly here justnow.A. was readingB. r eadingC. had readD. to read30.Don’t __ too late, or you will feel tired in tomorrow’s classes.A.stay upB. to stay upC. staying upD. stayed up31. Peter will go to see his grandparents when he_____ time.A. hasB. haveC. hadD. wil1have32. —Is that Jack speaking?—Sorry, he isn't in right now. He _______the cinema with。

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