2020-2021学年杭州高桥初中九年级10月月考试卷

2020-2021学年第一学期初三10月份月考英语试卷（试卷总分120分考试时间：90分钟）I. 单项选择(满分15分)( )1. --Kate, keep calm and be confident. I’m sure you are ________excellent student.--It’s very kind of you. Thanks.A. aB./C.an( )2.--Where are Maria and Kangkang? --They ____________England.A. have been toB. have gone toC.had been in ( )3. When we went into the park, we saw someone__________Chinese Kungfu.A.to playB.playedC.playing( )4. We should always be polite to others __________we don’t like them sometimes.A.ifB.thoughC.because( )5.-- Every day I’m in a hurry when I have so many lessons to take and so much homework to do.-- You need to learn how to ________your time.A. manageB.enjoyC.pass( ) 6. Thanks ___________Project Hope, about 5 ________children have got a better education.A.for; millions ofB.to; millionC.to; million( )7. It’s reported that at least 43 people were dead _________a big fire in a factory in India.A. on purposeB.because ofC.according to( ) 8. --Now more and more people have realized that __________is more important than health.--Yes, we can’t study or work well without healthy body.A. somethingB.anythingC.nothing( )9. The machine produces __________noise and it is really _________noisy.A.too many; too muchB.much too; too muchC.too much; much too ( ) 10.-- Rita, your Chinese is good. __________have you been in China?--Since 2017.A.How farB.How longC.How often( )11. --Which would you like to drink, tea or coffee?-- __________, thanks. I’m not thirsty.A.NeitherB.EitherC.Little( )12. The Chinese Women’s volleyball team _________winning the gold medal at 2019 FIVB V olleyball Women’s World Cup.A.succeeded inB.pay attention toC.got used to( )13.-- The boy misses his parents very much.--So he does. They ____________the hometown for nearly two years.A. have leftB.will leaveC.have been away from( )14. --I wonder ____________. --It seems difficult, but I would like to have a try.A. where you made this model carB. why did you make a model carC.if you make a model car( )15.--The air on the hill is fresh, and there are many beautiful birds singing there. Can we have a picnic there?-- _______________.Let’s go.A.Of course notB.Sounds greatC.No wayII.完形填空(满分15分)One fine day, a bus driver went to the bus garage, started his bus and drove off along the route(路线)No problems for the first few stops, a few people got on, a few got off, and _____16______went generally well.At the next stop, however, a big guy got _____17_______.Six feet eight, built like a wrestler(摔跤选手), arms hanging down to the ground.He looked at the driver and said, “ Big John doesn’t ______18_______!” and sat down at the back.The driver was five feet three. thin, a nd basically gentle. Naturally, he didn’t argue with Big John, but he wasn’t ____19_______about it.The next day, the _____20_______thing happened - Big John got on again, said “Big John doesn’t pay!” and sat down.And the next day, and the one after that, and so fifth.This made the bus driver ______21_________, who started losing sleep over the night. Big John was taking advantage of his size.Finally he could not ____22_____it any longer. He signed up for body building programs, karate(空手道), judo(柔道) and all that good stuff.By the end of the summer, he had become quite ____23_______. Soon the next Monday, when Big John got on the bus and said, “ Big John doesn’t pay! T he driver stood up. glared back and _____24________, “And why not?”With a surprised look on his face, Big John answered, “ Big John has a bus pass(月票).”First be sure there is a ______25______before working hard to solve one.( ) 16. A. things B. cars C.machine( ) 17. A. on B.off C.up( ) 18. A. cry B. walk C.pay( ) 19. A. happy B. worried C.anxious(紧张的)( ) 20. A. terrible B. same C.interesting( ) 21. A. glad B. happy C.angry( ) 22. A. consider B. bear C.get( ) 23. A. strong B. brave C.healthy( ) 24. A. cried B. answered C.shouted( ) 25. A. mystery(神秘) B. problem C.difficultyIII. 阅读理解（共两节，满分45分）第一节（2分/题共40分）(A.)Tina did a survey about volunteer work on a social networking site.(社交网站). Some volunteers shared their experiences on the site.( )26. Torlin has volunteered as a ________________for three months.A.nurseB.French teacherC.animal doctorD.P.E.teacher ( )27.ROS provides _______for children and older people.rmationB.roomsC.foodD.clothes( )28. Indy volunteered at a hospital for________________A.three monthsB.a school yearC.over two yearsD.three years ( )29. One requirement for Marian to graduate from high school was to ________________.A.do sportsB.feed animalsC.pass a French examD.do volunteer work ( )30.Which of the following statements is TRUE?A.Marian is busy nowB.Indy loves dogs very muchC.Torlin isn’t very good at FrenchD.Freedom isn’t volunteering now(B)In a small village, there used to be two friends whose ages were 5 and 10. Both lived on the same street. The name of the 5-year-old was Jonny and the 10-year-old was John. John was much bigger and stronger than Jonny.One day they ran into the forest and played hide-and-seek there. Suddenly John fell into a pit (深坑). John started shouting for help. Jonny ran to John at once. Without wasting a minute, he got a rope and gave one end to John and asked him to hold on to it. Jonny tried very hard and finally pulled John out from the pit. Both of them cried, smiled and then walked towards home.Since Jonny and John were away for a long time, their parents got worried. All the villagers started to help search for the children. When Jonny and John finally arrived back in the village, everyone was excited. Their parents hugged them and asked where they had gone.Jonny and John told everyone what had happened in the forest. However, almost no one believed them. One person asked Jonny, “ How can you help a person who is double your size and weight?”Then Jonny replied, “ I used a rope.”Everyone laughed , and Jonny’s father said, “ Don’t tell stories to us.”Among the people was a wise old man. He said that everything the boy said was true.A woman asked, “ Jonny is only five years old. How was he able to do that?”The old man replied, “ That’s because there was no one there to tell Jonny ' you can’t do it'”( )31. What were the boys like?A.John was younger that JonnyB.John was 5 years old.C.Jonny was very strongD.John was older and stronger than Jonny ( )32.What happened to John in the forest?A.Jonny fell into a pit and John helped him outB.John fell into the pit and Jonny helped him outC.John played hide-and-seek and lostD.John fell into a pit and a wise old man helped him out( )33.Who went to search for the boys?A.John’s parentsB.Jonny’s parentsC.all the villagersD.The wise old man( )34. What does the underlined phrases mean?A.tell liesB.tell jokesC.tell the truth(真话)D.tell exciting things( )35. What does the story tell us?A.We shouldn’t tell anyone: “You can’t do it!”B.If you believe you can, you canC.The young can save the oldD.We should always believe others.(C).Stolen Stamp MysteryA man named Richard likes to collect stamps that have monkeys on them. Monkey is his favorite animal. He keeps the stamps in a secret binder (活页夹). The last time he checked, he had 8351 stamps.One day, he bought another 100 stamps. But when he opened his binder, he found that his stamps were gone! He suspected (怀疑)these people:Jeff:His landlord (房东). Loves collecting stamps.Jack: His brother. Loves animals, especially monkeys.David: His other brother. A kleptomaniac( 盗窃癖患者).Richard gathered them before his and asked, “Where are my monkey stamps?”Here is what they said:Jeff: I don’t have yours. I have my own collection, remember?Jack: Why would anyone want thousands of useless stamps?David: What stamps?Richard said: “ I know which one of you it is! You’d better give them back. ( )36. What does Richard like to collect?A.MonkeysB.stampsC.Stamps with animalsD.stamps with monkeys( )37.How many stamps did he buy that day?A.8351B.NoneC.100D.8451( )38.Who is Jeff?A.His brotherB.His friendC.His landlordD.The thief(小偷)( )39. Who likes monkeys?A.RichardB.JackC.JeffD.Both A and B( )40. According to their words, who may be the thief?A.JeffB.JackC.DavidD.Nobody(D)Wars, disease, hunger, climate change... Our world is far from being a safe and peaceful one. You may have asked: What can I do to help?Many young people like you also dream of making the world a better place. Some of them choose to work for the United Nations, the largest and most powerful intergovernmental organization in the world.Kong Ao from Shenzhen joined the UN at 23. While on a TV show, she shared her experience working in Africa to improve people’s lives. “ We built many schools in the hope that all girls there can receive the same education as boys. But no matter how hard we tried, the drop-out rate(辍学率) for girls was still high, “ Kong said. She later found out why. “ The girls didn’t have sanitary pads. That’s what stopped them from going to school.“ You can’t stand in someone else”s shoes and make the right decision without going to the front lines(前线)to see what’s really happening, “ Kong said.Today, the UN has 44,000 staff (员工). About three fifths of them work in the fields like Kong, while others work in offices. There are also many passionate (有热情的）volunteers and interns (实习生). They are solving all kinds of problems-from ending conflicts(冲突) and dealing with poverty (贫困)to protecting the environment and defending(保障)human rights.This year is the 75th anniversary of the UN. The organization said it would keep working to make our planet a peaceful, equal and healthy one.( ) 41.There are problems which the passage mentions in our world except_________________:A.HungerB.WarsC.FiresD. Disease( ) 42.According to the passage, what is the largest and most powerful intergovernmental organization in the world?B.The UN B.The World Health OrganizationC.The WTOD. The International Committee of the Red Cross( ) 43.How many staff in the UN who work in the front lines:?C.44000 B.26400 C.17600D.Fewer than 20000 ( ) 44.When was the UN founded?D.In 1985 B.In 1949 C.In 1945 D. In 2000( ) 45.What problems aren’t the UN staff working to solve?A.dealing with povertyB. protecting the environmentC.defending human rightsD.ending the war第二节.阅读下列短文，从短文中所给的五个选项中选出能填入短文空白处的最佳选项，使短文通顺，连贯，意思完整.（1分/题）(E)Traffic safety tips are something that is not just for kids! Remember that most accidents happen because of adults! We should remember some traffic safety dos and don’ts, and this article will help you do exactly those!_______46_________. Remember when you are driving a car with your kids sitting next to you, they are watching how you drive. If you don’t follow traffic rules today, they won’t tomorrow. So you must make sure that you follow all the necessary traffic rules to set a good example.The first thing that you are supposed to do, and make sure that others in the car also do, is to put your seat belt on. _________47___________. If there is a child in the car between the age of 4 and 8, a booster seat(儿童座椅) should be used. Kids under the age of 12 should never sit on the front seat.Do you listen to music, eat your sandwich and speak on the phone when you drive? _____48___________.Once you are driving, whether you are alone or with your friends and family . You are responsibly for everyone in the car.Driving under pressure with your mind filled with problems at work or at home would easily allow you to draw your mind off the road, causing an accident. So make sure that you let the things outside your car when you are in the car. ______49__________So these were some of the main traffic safety tips that should be followed by one and all in order to stay safe and be an example for others. Remember, rules and regulatons are made for your own safety.________50________. Take care and have a safe ride.IV.情景交际根据情景提示，完成下列各题(满分10分)1.你想知道这里发生了什么，你会这么问？_________________________________________________?2.你想告诉爸爸妈妈这学期你已经进步很大了，你可以这么说：_______________________________________________________3.你想告诉大家让我们成文更环保的人，你可以这么说：_______________________________________________________4.朋友Alice 买了一本有趣的书，你想知道她买了多久了，可以这样问她：_____________________________________________________, Alice?5.David 因为玩游戏错过了他盼望已久的演唱会，你可以这样感叹：___________________________________________!V.看图写话根据每小题所提供的图画情景和提示词，写出一个与图画情景相符的句子(满分10分）1. __________________________________________2. __________________________________________3. __________________________________________4. __________________________________________5. __________________________________________VI. 短文填词（满分10分）_______1_______to Project Hope, a village school _______2______(call) Quanzigou School has changed a lot. The old name of this school is named _____3_______a river around.In the past, most of its students dropped out of school(辍学) ______4______their families were very poor. Their parents couldnot____5______their education. The classroom was only ____6____old house. Things are different now. All the ____7_______(child) have come back to school. Now there is a new teaching _____8_____(build) with enough classrooms init. The school, with a new name Hope School, has _____9______sports facilities(设施). Project Hope is really ____10_______(help)._______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ ______________________________________________________________________________答案：I.1-5 CBCBA 6-10 BBCCB 11-15 AACCBII. 16-20 AACAB 21-25 CBACBIII.26-30 BCCDA 31-35 DBCAB 36-40 DCCDB 41-45 CABCD 46-50 DAECBIV.1. What has happened here?2.I have already made great progress this term.3.Let’s be greener persons/pe ople.4.How long have you had the interesting book, Alice?5.What a pity/shame!V. 1. He used to listen to the radio.2. I have seen the film twice.3.There is a girl jumping ropes now.4.Smoking does harm to our health.5. Planting trees is good for the environment.VI. 1. Thanks 2. called 3.after 4.because 5.afford 6. an 7.children 8.building 9.enough 10.helpful。

浙江省杭州市九年级上学期数学10月月考试卷姓名:________ 班级:________ 成绩:________一、单选题 (共9题；共18分)1. （2分）在数轴上表示不等式2（1﹣x）＜4的解集，正确的是（）A .B .C .D .2. （2分）如图，在△ABC中，AB=AC ， D为BC中点，∠BAD=35°，则∠C的度数为（）A . 35°B . 45°C . 55°D . 60°3. （2分）如图，在△ABC中，AB=AC，∠A=25°，DE垂直平分AC，交AB于点D，连接CD，则∠BCD的度数为（）A . 50°B . 25°C . 52.5°D . 无法确定4. （2分）有以下条件：①一锐角与一边对应相等；②两边对应相等；③两锐角对应相等．其中能判断两直角三角形全等的是（）C . ③D . ①②5. （2分）(2017·路北模拟) 如图，△ABC中，D为AB中点，E在AC上，且BE⊥AC．若DE=10，AE=16，则BE的长度为何？（）A . 10B . 11C . 12D . 136. （2分）等腰三角形的一个外角为140°，那么底角等于（）A . 40°B . 100°C . 70°D . 40°或70°7. （2分）如图在平面直角坐标系xOy中，直线y=kx（k为常数）与抛物线y= x2﹣2交于A，B两点，且A点在y轴左侧，P点坐标为（0，﹣4），连接PA，PB．以下说法正确的是（）①PO2=PA•PB；②当k＞0时，（PA+AO）（PB﹣BO）的值随k的增大而增大；③当k=﹣时，BP2=BO•BA；④三角形PAB面积的最小值为．A . ③④B . ①②8. （2分） (2017七下·苏州期中) 若a<b，则下列不等式变形错误的是（）A . a＋1 < b＋1B . <C . 3a－4＞3b－4D . 4－3a＞4－3b9. （2分）已知不等式组的解集中共有5个整数，则a的取值范围为（）A . 7＜a≤8B . 6＜a≤7C . 7≤a＜8D . 7≤a≤8二、填空题 (共11题；共11分)10. （1分）不等式的正整数解为________.11. （1分）给出下列表达式：①a（b+c）=ab+ac；②-2＜0；③x≠5；④2a＞b+1；⑤x2-2xy+y2；⑥2x-3＞6，其中不等式的个数是________12. （1分）若a，b均为整数，a+b=﹣2，且a≥2b，则有最大值________13. （1分）若是关于的一元一次不等式，则的取值是________。

浙江省杭州市萧山区高桥初中教育集团2024-2025学年九年级上学期10月月考数学试卷一、单选题1．第24届冬季奥林匹克运动会于2022年2月4日在北京开幕．2022年北京冬奥会会徽以汉字“冬”为灵感来源；北京冬奥会的吉祥物“冰墩墩”是以熊猫为原型进行设计创作；北京冬季残奥会的吉祥物“雪容融”是以灯笼为原型进行设计创作．下列冬奥元素图片中，是轴对称图形的是（ ）A ．B ．C ．D ．2．计算(3)2-⨯的结果是（ ）A ．6-B ．1-C ．1D ．63．抛物线2y x =先向右平移1个单位，再向上平移3个单位，得到新的抛物线解析式是（ ） A ．()213y x =++B ．()213y x =+- C ．()213y x =-+ D ．()213y x =-- 4．一个不透明盒子里，共装有10个白球，5个红球，5个黄球，这些球仅颜色不同．小明从中任取一球，下列说法错误．．的是（ ） A ．摸到白球的可能性最大 B ．摸到红球和黄球的可能性相同C ．摸到白球的可能性为12D ．摸到白球、红球、黄球的可能性都为13 5．一技术人员用刻度尺（单位，cm ）测量某三角形部件的尺寸．如图所示，已知90ACB ∠=︒，点D 为边AB 的中点，点A B 、对应的刻度为17、，则CD =（ ）A ．3.5cmB ．3cmC ．4.5cmD ．6cm6．如图，抛物线21y ax bx c =++与直线2y mx n =+相交于点()3,0和()0,3，若2ax bx c mx n ++>+，则x 的取值范围是（ ）A ．03x <<B ．13x <<C ．0x <或3x >D ．1x <或3x > 7．已知二次函数2y ax bx c =++的y 与x 的部分对应值如下表，则下列判断中错误．．的是（ ）A ．抛物线开口向上B ．抛物线的对称轴是直线2x =C ．当04x <<时，0y <D ．若()11,A y ，()24,B y 是图象上两点，则12y y >8．如图，已知二次函数的图象，则它的表达式可能是（ ）A ．()2y ax bx a b =--+B ．()()1y x a x a =+-+C ．21(2)2y x m x m =+++ D ．2(2)41y x m m =+++9．已知一元二次方程20ax bx c ++=有一个根为12024，且20b c +=，则方程20cx bx a ++=一定有一个根为（ ）A ．2022-B ．2023-C ．2024D ．2025-10．如图正方形ABCD ，以AD 为斜边作直角三角形AED ，过点B 作ED 的垂线交ED 于F ，交正方形对角线AC 于G ．连结DG ，已知8DE =，则GFD V的周长是（ ）A ．16B ．15C ．17D ．14二、填空题11．当x =时，分式21x -的值为1． 12．借助新媒体传播，去年的“淄博”和“哈尔滨”等城市大火了一把，小澈想从下面4个萧山景点中任选一个制作抖音推广视频，那么“义桥老街”被选中的概率是．13．如图，在菱形ABCD 中，80A ∠=︒，则CBD ∠的度数为．14．下面关于函数()()1y mx n x =+-（m 、n 均为常数）的说法正确的是．①函数与x 轴总有2个交点；②无论m 取何值，函数图象一定会过点()1,0；③若0m <且0n >，则函数顶点一定在第一象限；④若0y ≤恒成立，则m n =-．15．已知二次函数()2210y ax ax a =++>，当0m x ≤≤时，y 有最小值1a -和最大值1，则m 的取值范围是．16．已知二次函数22423y x mx m =-++-的图象与y 轴的交点为点A ．点()11,B x y 在函数图象上的任意一点，且不与点A 重合，直线(0)y kx b k =+≠同时经过A ，B 两点．若15x <-时，总有0k >，则m 的取值范围为．三、解答题17．已知，整式133m ⎛⎫+ ⎪⎝⎭的值为P ．(1)当1m =时，求P 的值；(2)若P 的取值范围如图所示，求m 的取值范围．18．某学校在开展“节约每一滴水”的活动中，从九年级学生中任选出10名学生，收集了他们各自家庭最近一个月的节水情况，将有关数据整理如下表所示．(1)求这10名学生这个月平均每个家庭的节水量；(2)若要从节水量是1.5吨的甲、乙、丙、丁4人中任选两人分享节水心得，补全如图所示的树状图，并求恰好选中乙和丁的概率．19．数学课上老师要同学证明命题“对角线互相平分的四边形是平行四边形”是正确的． 小红同学先任意画出ABC V ，再取边AC 的中点O ，连结BO 并延长到点D ，使OD OB =，连结AD ，CD （如图所示），并写出了如下尚不完整的已知和求证．四边形．(1)补全已知和求证（在方框中填空）．(2)小红同学的思路是利用三角形全等，依据“一组对边平行且相等的四边形是平行四边形”来证明，请完成证明过程（可以用小红的思路，也可以用其他方法）．20．已知抛物线()223(0)y a x a=-+≠(1)该抛物线的顶点坐标是______(2)若该抛物线经过点()1,0A-，求抛物线的解析式．(3)若抛物线在21x-≤≤时，有最大值5，求a的值．21．问题情境：第二十四届国际数学家大会会徽的设计基础是1700多年前中国古代数学家赵爽的“弦图”，如图，在综合实践课上，同学们绘制了“弦图”并进行探究，获得了以下结论：该图是由四个全等的直角三角形和中间一个小正方形拼成的大正方形ABCD，且ABF BAF∠>∠．连接BH．设AF x=，BF y=．小澄从面积的特殊化提出问题：若6x y+=，求正方形ABCD的面积s关于x的表达式（不用写出自变量的取值范围）并直接写出s的取值范围．小澈从x与y关系的特殊化提出问题：若2x y=，求证：BAE BHE=∠∠．22．综合与实践《九章算术》中记载，浮箭漏（图①）出现于汉武帝时期，它由供水壶和箭壶组成，箭壶内装有箭尺，水匀速地从供水壶流到箭壶，箭壶中的水位逐渐上升，箭尺匀速上浮，可通过读取箭尺读数计算时间．某学校STEAM小组仿制了一套浮箭漏，并从函数角度进行了如下实验探究：【实验观察】实验小组通过观察，每2小时记录一次箭尺读数，得到如表：【探索发现】（1）①建立平面直角坐标系，如图②，横轴表示供水时间x ，纵轴表示箭尺读数y ，描出以表格中数据为坐标的各点．②观察上述各点的分布规律，发现这些点大致位于同一个函数的图象上，且这个函数的类型最有可能是______；（填“一次函数”、“反比例函数”或“二次函数”）并根据你所选择的函数类型求出函数表达式（自变量取值范围不写）【结论应用】（2）应用上述发现的规律估算：①供水时间达到11小时时，箭尺的读数为多少厘米？②如果本次实验记录的开始时间是上午8:00，那当箭尺读数为96厘米时是几点钟？（箭尺最大读数为100厘米）．23．在平面直角坐标系中，设二次函数()20y ax bx c a =++≠．(1)若函数的图象经过()3,0和()5,0两点，函数的对称轴为直线x ______(2)若1a =，将函数图象向下平移两个单位后与x 轴恰好只有一个交点，求22b c +的最小值．(3)若函数与x 轴交于()1,0x 和()2,0x ，当212x x =时，求证：292ac b =．24．在平面直角坐标系中，设二次函数21(0)y ax bx c a =++≠．(1)若2b a =，且二次函数1y 过()1,0和()0,3-．①求二次函数1y 的解析式；②当22x -<<时，求1y 的取值范围；(2)现有另一函数22)0(y dx ex f d =++≠，若函数1y 的图象顶点在函数2y 的图象上，函数2y 的图象顶点在函数1y 的图象上，且ae bd ≠，求a 与d 的数量关系；(3)若1y 顶点在2y x =上，且顶点坐标为(),m n ，图象过点()1,2，在函数图象上有三个点()2,p -，()1,q -，()2,t ，当q p t <<时，直接写出m 的取值范围为______．。

浙江省杭州市2020版九年级上学期数学10月月考试卷A卷姓名:________ 班级:________ 成绩:________一、单选题 (共6题；共12分)1. （2分） (2015八下·洞头期中) 下列方程是一元二次方程的是（）A . 2xy﹣7=0B . x2﹣7=0C . ﹣7x=0D . 5（x+1）=722. （2分）已知函数与轴交点是，则的值是（）A . 2014B . 2013C . 2012D . 20113. （2分）如图，⊙O的半径OD垂直于弦AB，垂足为点C，连接AO并延长交⊙O于点E，连接BE，CE．若AB=8，CD=2，则△BCE的面积为（）A . 12B . 15C . 16D . 184. （2分）下列事件是必然事件的是（）A . 五边形内角和是360°B . 打开电视，正在播放广告C . 在一个等式两边同时除以同一个数，结果仍为等式D . 平移后的图形与原来图形对应线段相等5. （2分）如图，小方格都是边长为一的正方形，则三角形ABC中BC边上的高是（）A . 1.6B . 1.4C . 1.5D . 26. （2分）如图,从圆O外一点P引圆O的两条切线PA,PB,切点分别为A,B.如果∠APB=60°,PA=8,那么弦AB 的长是（）A . 4B . 8C .D .二、填空题 (共10题；共10分)7. （1分）已知一个正数的平方根是2x和x﹣6，这个数是________8. （1分）如图，⊙O的半径为1，P是⊙O外一点，OP=2，Q是⊙O上的动点，线段PQ的中点为M，连接OP、OM，则线段OM的最小值是________．9. （1分）(2020·南宁模拟) 如图，在扇形AOB中，，半径OC交弦AB于点D，且，若，则阴影部分的面积为________.10. （1分）一个不透明的布袋里装有100个只有颜色不同的球，这100个球中有m个红球通过大量重复试验后发现，从布袋中随机摸出一个球摸到红球的频率稳定在左右，则m的值约为________.11. （1分）(2016·重庆B) 某学校组建了书法、音乐、美术、舞蹈、演讲五个社团，全校1600名学生每人都参加且只参加了其中一个社团的活动．校团委从这1600名学生中随机选取部分学生进行了参加活动情况的调查，并将调查结果制成了如图不完整的统计图．请根据统计图完成下列问题：参加本次调查有________名学生，根据调查数据分析，全校约有________名学生参加了音乐社团；请你补全条形统计图．12. （1分）如图，正方形ABCD的边长为4，点P在DC边上且DP=1，点Q是AC上一动点，则DQ+PQ的最小值为________．13. （1分）关于x的一元二次方程x2+bx+2=0有两个不相等的实数根，写出一个满足条件的实数b的值：b=________．14. （1分） (2019七下·双阳期末) 如图，已知△AOC≌△BOC，∠ACB=92°，∠B=98°，则∠1=________度。

2020-2021学年人教部编版九年级语文上册阶段测试卷（10月月考）本试卷分选择题和非选择题两部分，共8页，满分150分，考试用时120分钟。

第一部分积累与运用（共30分）1.下列加点字中，每对加点字的读音都不相同的一项是（）（2分）A.折磨/折本枉然/矫枉过正B.阻挠/妖娆闭塞/茅塞顿开C.弱冠/冠冕绮丽/杞人忧天D.娉婷/聘书红晕/晕头晕脑2.下列词语中没有．．错别字的一项是（）（3分）A.奔驰自出新裁襁褓郑重其是B.镌刻摇曳多姿推崇坦荡如坻C.踊跃一代天娇褴褛言简意赅D.鲜妍心无旁骛彗星一筹莫展3.依次填入下面横线处的词语，恰当的一组是（）（2分）在现今快节奏的、泛娱乐化为主的娱乐类节目霸屏的大环境下，《见字如面》《中国诗词大会》和《朗读者》等节目确实是。

它们以文化传播为载体，将个人成长与传世佳作相结合，用文字、声音、图片等传统载体，打造出一档档的文化类综艺节目，带给我们的不仅仅身心娱悦，更多的是思想和文化内涵的思考。

我们的综艺节目也应该成为具有中国文化内涵和民族风格的创新实践的“中国造”文化产品。

而此类节目的，无疑是满汉全席餐桌上的一道清粥小菜，清新雅致又别有韵味。

A．别开生面另辟蹊径应运而生B．另辟蹊径别开生面应运而生C．应运而生另辟蹊径别开生面D．别开生面应运而生另辟蹊径4.下列句子中没有．．语病的一项是（）（3分）A.在央视的文化节目《国家宝藏》中，通过明星守护人的讲述，使观众看到了国宝的“前世今生”，对国宝有了更深入的了解。

B.从中国的简帛、欧洲的羊皮卷到今天的电子墨水屏，人类的阅读载体不断演进，但人们对阅读的热爱、对精神世界的守望却从未改变。

C.《朗读者》开播后，许多广电名嘴、企业职工、机关干部、退休教师、留学生吟诵社等朗读爱好者，纷纷加入文化经典诵读的行列。

D.一家研究机构的调查结果显示，超过50%以上的人有“手机依赖症”，总期待自己收到最新的信息，获得更丰富的交流素材。

5.下列选项中的句子填入横线处与前后衔接最恰当的一项是（）（3分）中国自古以来就有重视家风家训的传统。

2023-2024学年浙江省杭州市高桥初中教育集团九年级10月月考语文试题1. 为丰富学习内容，编辑组将现代诗歌与古诗文进行联读，完成下面的联读表格。

A．这是一首长诗，用沉郁的笔调细写了乳娘兼女佣“大堰河”的生活痛苦……我不能不喜欢《大堰河》。

——茅盾B．归真返璞，我爱好他的朴素、平实，爱读他那用平凡的语言，自由的格式，不事雕琢地写出的激动人心的诗篇。

——唐弢C．它把我们从怀疑、贪婪的成人的世界，带到秀嫩天真的儿童的新月之国里去……它却能使我们在心里重温着在海滨以贝壳为餐具，以落叶为舟，以绿草的露点为圆珠的儿童的梦。

——郑振铎D．在国难当头、山河沦亡的年代，诗人歌唱“土地”具有格外动人的力量，而诗人那种不断转折和强化的抒情方式，当然也是和充满险阻坎坷的时代相吻合的。

——孙光萱3. 音频组选择了艾青代表作品《阳光在远处》录制朗读音频，请你帮其设计朗读。

《阳光在远处》艾青阳光在沙漠的远处，船在暗云遮着的河上驰去，暗的风，暗的沙土，暗的旅客的心啊。

——阳光嘻笑地射在沙漠的远处。

一九三二年二月三日苏伊士河上【活动二】班级开展“鲲鹏”主题毕业文化衫设计活动，请你参加。

鲲鹏记大解①森林里有一棵大树，非常羡慕天上的飞鸟，幻想有一天也能飞起来。

为了实现这个美丽的梦想，它的树枝尽力向两边伸展，像树干上长出了翅膀。

②有了翅膀，飞翔就不再是奢望。

每当有风吹过，树林里的其他树木都在摇晃，唯有它，伸展的树枝上下翻动，仿佛在吃力地飞翔。

③由于根须深扎在土地里，尽管大树费力振翅，也无法离开土地半步。

作为一棵树，能做到这一步已很不容易了，但它不满足，它的理想是像大鹏那样展开巨大的翅膀，在天地之间自由来往。

它还想飞到天外，飞到太阳的后面也不停下。

④这棵大树经过多年的练习，终于有一天拔地而起，飞到了天空中。

⑤当大树拔地而起的那一刻，大地发出了轰鸣，从树根拔起处喷发出一股带血的泥浆。

当时，大地不仅松开了树根下的泥土，也使出了洪荒之力，把大树送入了天空。

浙江省杭州市北师大附属杭州中学2020-2021学年九年级上学期10月月考英语试题学校:___________姓名：___________班级：___________考号：___________一、阅读单选Looking for Teens Interested in Child CareThis is a chance for teens to accompany(陪伴) a child through projects and activities, play with them indoors and outdoors, help with arts and crafts, deliver flyers to homes in the neighborhood, and so on.When: We welcome teen volunteers whenever they are available.How often: Our volunteers determine the amount of time they give and their schedule Where: Wilder Child Development Center, 911 Lafond Ave. St PaulLibrary InternPart-time, Temporary, $12.48-$13. 87/per hourProgram: Wilder ResearchResponsibilities: Help with moving to new buildings, record reports and other documents using a specialized database, get items from area libraries, help library users, help with literature searches, other everyday library chores and so on.Qualifications: Bachelor’s Degree(学士学位) with some library experience or a current Master(在读硕士) of Library and Information Science student. Strong attention to detail, good search skills and customer service skills.How to apply: Send personal information to Wilder Research, 1295 Bandna Blvd, or send an e-mail to jobs @Site ResponderPart-time, Regular, $9.46-$10.52/per hourProgram: Jackson St. VillageResponsibilities: Work at night to handle emergencies(紧急情况) provide services such as lawn care and clean off the snow, support the needs of residents(居民) and take care of the property and buildings.Qualifications: Must have good communication skills and must be able to solve the problems and be friendly to their visitors, and staff. Individuals or teams are encouraged to apply.How to apply: Send personal information to Wilder Foundation, 516 Humboldt Avenue, St.Paul, MN 55107 or a fax to (651)223-7273, or an e-mail to jobs @wilder. org1．As a volunteer in the child center, .A．you should follow the schedule of the center strictlyB．you must keep the child you look after indoorsC．you will get some money for what you have doneD．you can decide how long to stay there by yourself2．What may NOT be needed if you apply to Wilder Research program?A．A college degree and library experience. B．Having knowledge of the Internet. C．Being willing to help others. D．Being able to handle emergencies. 3．The three advertisementsA．are not all for part-time opportunities. B．are not all chances to make some extra money.C．all can be communicated on the Internet. D．are offered by the same organization.Coffee is a necessary part of Italian culture and since arriving here over six months ago, I have definitely drunk a lot of it!Of course, coffee is also very popular in the UK, but coffee culture in Italy is a completely different story. In Italy, when you order a coffee in a cafe or a bar, you are presented with a tiny, bitter espresso(蒸馏咖啡). This is “normal coffee” for Italians and they are not so interested in the huge coffees that we drink in the UK. In addition, while takeaway coffee is extremely popular among Englishmen, it is not very common at all in Italy, especially in non-touristy areas. Generally, Italians prefer to drink their tiny coffees while standing at the bar and, for many, this short break is an important part of their day.Typically, breakfast at a bar in Italy includes a coffee and a pastry(油酥糕点). I have been spoiled for choice with lovely cafes in the Italian town I'm living in. These cafes sell a series of mouth-watering pastries—either plain or filled with cream, chocolate, jam or Nutella—as well as delicious coffee. Cappuccinos are very popular at breakfast time and, for me, a creamy cappuccino and a pastry is the perfect way to start the day. I think it's a nice way to head to bar to buy a coffee and a pastry for breakfast before working and it's relaxing to take more time to enjoy such breakfast at the weekend.Finally, I have found that coffee in Italy is so much cheaper than coffee in the UK. Of course, this means that in Italy, it is possible to go out for coffee regularly without breaking the bank.4．Which of the following do Italians like better?A．Takeaway coffees.B．Huge coffees.C．Creamy coffees.D．Tiny, bitter coffees.5．What does the word “they” in Paragraph 2 refer to?A．Italians. B．Britons.C．Coffees. D．Cafes.6．What does the writer usually do when in Italy?A．Sell tiny coffees to Italians.B．Travel in touristy areas.C．Enjoy a coffee with a pastry.D．Break the bank regularly.7．Why can the writer often go out for coffee without breaking the bank in Italy? A．Because coffee is a part of Italian culture.B．Because there are so many cafes or bars.C．Because Italian pastries are very delicious.D．Because Italian coffee is very cheap.Some people are great at remembering faces. Once they meet you, they never forget how you look. For some people, remembering a face can be difficult. You may have to meet them several times before they can recognize you. For others, remembering a face is simply impossible. Such people have a condition of the brain called “face blindness.” Its actual name is developmental prosopagnosia, or DP for short.Experts say there are great differences between patients. In less severe conditions, peopleare unable to describe the face of someone they have just met. In severe conditions, people cannot even recognize their own kids in a group photograph.Many people who have DP show no clear signs. Dacia Reid is one of them. If you met her, you probably would not know that her brain got injured as a child. There would be no sign of it until you meet her a second time. She would not remember how you looked. Reid has mostly got well from her injuries. But now, she suffers from face blindness.The latest study on face blindness come from the Prosopagnosia Research Centers at Dartmouth College in the United States. The researchers studied how people recognize faces. They compared 22 patients with DP to 25 other people. The researchers showed them videos of faces, bodies, physical objects and other things. They found that people with DP may not have been able to remember faces, but they could recognize scenes, bodies and other things.The researchers say this study on face blindness will not directly lead to any treatments. However, it could lead to a deeper understanding of how we all remember the world around us. “We hope that by really developing and understanding face processing itself — that will provide us with a model for understanding how other parts of the brain work.”8．The underlined word “severe” in Paragraph 2 probably means “”.A．important B．serious C．popular D．different 9．The writer explains the underlined sentence in paragraph 3 by _______.A．making a research B．having a discussionC．giving an example D．doing an experiment10．From the passage we know patients with DP _______.A．can easily keep everything in memoryB．have trouble in remembering facesC．are unable to remember anything they’ve seenD．never forget how you look once they meet you11．The writer wrote this passage in order to ________.A．introduce DP and the research about itB．describe how to avoid suffering from DPC．encourage people to help patients with DPD．explain why people suffer from face blindnessEverybody knows how important it is for students to get a good night's sleep everynight. You aren't able to do your best and keep up with all of your responsibilities unless you sleep well. I'm sure you already know that you should go to bed at a reasonable hour. Most experts agree that the ideal number of hours is eight, and his has been accepted as common sense for as long as I can remember. However, I was young once and I know that most of you get much less sleep than that—and in some cases it will be affecting your schoolwork.I read an interesting article in a teachers' magazine recently. they did a study of 848 students in Wales. Worryingly, the results showed that teenagers are facing a new problem. They may go to bed get up at suitable times but a growing number are waking up in the middle of the night, not to use bathroom or have a snack but because of a new phenomenon:FOMO-fear of missing out!According to the article, schoolchildren are suffering because of a growing trend（趋势）to wake up during the night to check social media. Afraid of missing a comment or opportunity to take part in a chat teenagers are waking at all times of the night, going online and getting involved. All this happens when they should be sound asleep.Experts are worried about this growing trend and the report gives some worrying results that I'd like to share with you: 23% of 12 to 15-year-olds wake up nearly every night to use social media. Another 15% wake up at night once a week for the same reason. One in three students are often tired and unable to behave energetically in the daytime. Students who use social media during the night are more likely to suffer from depression and anxiety.So, I'd like to ask you to be responsible when it comes to social media. Be brave! Switch off your devices at night. The world won't end and your social media will be waiting to greet you in the morning! I give you my word that you won't have missed anything important. 12．From the writing. we know that the writer is worried by _______.A．what he has read in the magazine B．what other teachers have told him C．what he is seeing with his pupils D．what he has studied since he was young 13．Fear of Missing Out is _______.A．a feeling of not going out at night B．a fear of missing the newest phones C．a feeling of not keeping up with your tasks D．a fear of missing chances of chatting online14．Which of the following best shows the structure of this passage?（P=paragraph）A．B．C．D．15．Which part of the magazine is the passage most probably from?A．Travel & Adventure B．HealthC．Entertainment D．Fashion & Beauty二、补全短文6选5The following are some important reasons why you need to set goals for yourself.16．Having a goal written down with a set date for accomplishment(完成)gives you something to plan and work for.17．Most of us have big dreams that seem impossible to accomplish. It's easy to feel disappointed when you're staring at a difficult task. Proper goal setting can help break larger aspirations(愿望)into smaller and more achievable stepping stones.18．Sometimes, looking back on a goal you set for yourself six months, or one year ago, you realize that you were supposed to accomplish a lot more than you actually did. It's a sign that whatever you're doing isn't working. So you need to make real changes if you want to get where you want to be.19．There are times when we set goals that don't really show what we want. Sometimes we think we need more money, when we really need a change of environment. By asking ourselves what we really want and continually reconsidering our goals, we can find out what we really want in life.20．Imagine you're on vacation. Wouldn't you want to find out exactly what you want to see with the limited(有限的)time?In many ways, life is like a vacation. We're given a limited amount of time to pursue the experiences we want and then before you know it, it's time to go. Without a clear sense of what you want to do you'll never be able to live life to the fullest.A．Goals move you forward.B．Goals help you live life to the fullest.C．Goals help you make more money.D．Goals hold you accountable (对……负责) for failure.E.Goals tell you what you truly want.F.Goals help to turn difficult tasks into easy ones.三、完型填空John Sumner and his bird friend "Chirpy" have developed a special connection since they started spending so many cold days playing together on the 21 . Sumner first met Chirpy when the bird had a broken leg. The seagull was 22 . Sumner helped to 23 him back to health.“I saw him crying and shouting24 my head in pain and I did not know what to do,” recalled 80-year-old Sumner. "The next day he came around me again and tried to 25 . He was still shouting in pain. I didn't think he would live, his leg was 26 broken.”To help the bird, Sumner fed it dog biscuits that he had originated 27 along to the beach for his pet dog Jack. With Sumner's help, Chirpy' s leg got well and it now shares a special 28 with Sumner."He comes right up to me, he gets so 29 . He won't go to anybody else but me, I think 30 he has got some kind of relationship with me, " says Sumner. "Because in March, he will go off and do his natural thing 31 then in September, he is back with me 32 they have finished making their home.”Chirpy is believed to be around 20 years old. It won't be close to anybody else on the beach, but the bird will fly straight over to Sumner 33 he arrives. There are about 20 black-headed birds on the beach. Chirpy is the 34 one that comes close to summer.“People are surprised when I tell them about it. They can't believe a seagull woul d come back like that. It makes you 35 what kind of world we actually are ---- do they know more than we think they know?”21．A．field B．farm C．mountain D．beach 22．A．lucky B．healthy C．sorry D．easy 23．A．take after B．look after C．take care D．look for 24．A．on B．above C．in D．beside25．A．leave B．eat C．drink D．land 26．A．careful B．hardly C．completely D．kindly 27．A．brought B．took C．lent D．borrowed 28．A．membership B．relationship C．leadership D．partnership 29．A．smart B．far C．close D．silly 30．A．what B．that C．if D．where 31．A．and B．but C．or D．so 32．A．before B．after C．since D．while 33．A．as long as B．as soon as C．as far as D．as well as 34．A．same B．last C．best D．only 35．A．know B．think C．wonder D．believe四、单词填空阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

九年级上学期数学10月月考试卷一、单项选择题1.以下函数关系式中，y是x的二次函数是〔〕A. B. C. D.2.以下事件中，是不确定事件的是〔〕A. 地球围绕太阳公转B. 太阳每天从西方落下C. 标准状况下，水在时不结冰D. 一人买一张火车票，座位刚好靠窗口y＝5x2的图象先向右平移2个单位，再向下平移3个单位，得到的函数图象的解析式为〔〕A. y＝5〔x+2〕2+3B. y＝5〔x﹣2〕2+3C. y＝5〔x+2〕2﹣3D. y＝5〔x﹣2〕2﹣34.以下关于抛物线y＝3〔x﹣1〕2+1的说法，正确的选项是〔〕A. 开口向下B. 对称轴是x＝﹣1C. 顶点坐标是〔﹣1，1〕D. 有最小值y＝15.某工厂1月份的产值为500万元，平均每月产值的增长率为x，那么该工厂3月份的产值y与x之间的函数解析式为( )A. y＝500(1＋x)B. y＝500(1＋x)2C. y＝x2＋500xD. y＝500x2＋x6.点在抛物线上，那么以下结论正确的选项是〔〕A. B. C. D.7.一个密码箱的密码，每个数位上的数都是从0到9的自然数．假设要使不知道密码的人一次就拨对密码的概率小于，那么密码的位数至少是( )A. 3位B. 4位C. 5位D. 6位y＝(x＋1)2与坐标轴的交点个数是( )A. 0B. 1C. 2D. 39.如图，二次函数y＝ax2+bx+c〔a＞0〕的图象与x轴交于A，B两点，与y轴正半轴交于点C，它的对称轴为直线x＝﹣1.那么以下选项中正确的选项是〔〕A. abc＜0B. 4ac﹣b2＞0C. c﹣a＞0D. 当x＝﹣n2﹣2〔n为实数〕时，y≥c10.点是二次函数〔〕的图象上一个定点，而是二次函数图象上动点，假设对任意的实数m，都有，那么以为根的关于t的方程是〔〕A. B. C. D.二、填空题11.某十字路口的交通信号灯每分钟红灯亮30秒，绿灯亮25秒，黄灯亮5秒，当你抬头看信号灯时，是绿灯的概率为________．y＝2x2﹣2x与x轴的交点坐标为________．13.将二次函数化成的形式为________.14.有两道门，各配有2把钥匙，这4把钥匙分别放在两个抽屉里，使每个抽屉里恰好有每一道门的1把钥匙。

九年级数学阶段检测试题卷(本卷满分120分)一、选择题：本大题有10个小题，每小题3分，共30分．在每小题给出的四个选项中，只有一项最符合题目要求．1．二次函数y＝2(x－1)2－3的图象顶点坐标为 ( )A．(1，3) B．(－1，－3) C．(－1，3) D．(1，－3)2．若二次函数y＝ax2的图象经过点( l，－2 )，则它也经过( )A．(－1，－2) B．(－l，2) C．(l，2) D．(2，1)3．以直线x＝2为对称轴，且经过点(0，1)的二次函数图象的表达式可以为( ) A．y＝(x－2)2＋1 B．y＝(x＋2)2＋1 C．y＝(x－2)2－3 D．y＝(x＋2)2－34．二次函数y＝2x2－4x＋c的最小值是0，那么c的值等于( )A．4 B．2 C．－4 D．85．二次函数y＝－3x2的图象上一点到x轴的距离是3，则该点的横坐标是( )A．－27 B．1 C．－1 D．1或－16．要得到二次函数y＝－x 2＋2x－2的图象，需将y＝－x 2的图象平移的方式为( ) A．向左2个单位，再向下2个单位B．向右2个单位，再向上2个单位C．向左1个单位，再向上1个单位D．向右1个单位，再向下1个单位7．已知(－1，y1)，(－2，y2)，(－4，y3)都是二次函数y＝－2x2－8x＋m图象上的点，则( ) A．y1＜y2＜y3B．y3＜y2＜y1C．y3＜y1＜y2D．y1＜y3＜y28．给出下列函数：①y＝－3x＋2；②4yx；③y＝5x2；④y＝3x，其中符合条件“当x＞1时，函数值y随自变量x增大而增大”的是( )A．①③B．②③C．②④D．③④9．如图是二次函数y＝ax2＋bx的图象，若一元二次方程ax2＋bx＋m＝0有实数根，则m的最大值为( )A． 3 B．－3C．－6 D．910．二次函数y＝ax2＋bx＋c的图象顶点为D(－1，2)，与x轴的一个交点A在点(－3，0)和(－2，0)之间，则以下结论：①b2－4ac＜0；②a＋b＋c＜0；③c －a ＝2；④方程ax 2＋bx ＋c －2＝0有两个相等的实数根． 其中正确结论的个数为( )A ．1B ．2C ．3D ．4 二、填空题：本题有6个小题，每小题4分，共24分．11. 若二次函数y ＝ax 2＋bx 的图象开口向下，则a 0（填“＝”或“>”或“<”）． 12．二次函数图象与x 轴交点为(3，0)，(1，0)，与y 轴交点(0，6)，则解析式为 ． 13．若二次函数y ＝ax 2＋4x ＋a 的最大值是3，则a ＝ ． 14．函数y ＝mx 2＋mx ＋m －2的值恒为负数，则m 的取值范围为 ．15．二次函数y ＝ax 2－2ax ＋c 的图象经过(－1，0)，则方程ax 2－2ax ＋c ＝0的解为 ． 16．已知二次函数y ＝2(x －m ) 2－1，当x ≤l 时y 随x 的增大而减小，则m 的取值范围为 ． 三、解答题：本题有7小题，共66分．解答应写出文字说明、证明过程或演算步骤． 17．(本题满分6分)已知y 是关于x 的二次函数，x 与y 的对应值如下表所示：(1)求y 关于x 的二次函数表达式． (2)求出表中m 的值．18．(本题满分8分)已知y ＝(m －2)mmx2＋6x 是二次函数，求m 的值，并判断此抛物线的开口方向，写出对称轴及顶点坐标．19．(本题满分8分)在平面直角坐标系中，设二次函数y1＝ax2＋2ax＋3(a≠0)．(1)若函数y1的图象经过点(－1，4)，求函数y1的表达式；(2)若一次函数y2＝bx＋a(b≠0)的图象经过y1图象的顶点，求a，b满足的关系式．20．(本题满分10分)小明参加实心球测试，某次投掷中实心球所经过的路线为二次函数图象的一部分(单位：米)，该函数解析式为y＝－112x2＋23x＋53．(1)直接写出小明出手时实心球的高度是多少米？(2)实心球在运行中离地面的最大高度是多少米？(3)如果实心球评分标准中规定10米及以上为优秀成绩，那么小明在这次测试中成绩是否能达到优秀？请说明理由．21．(本题满分10分)已知二次函数y＝－x2＋ax＋b的图象经过点A(x1，y1)，B(x2，y2)，且x1＝－2，x2＝6时，y1＝y2．(1)求a的值；(2)若P(m，n1)，Q(3，n2)也是该抛物线上两个点，n1＜n2，求实数m的取值范围；(3)若T(t，2t)不在抛物线上，求b的取值范围．22．(本题满分12分)某超市经销一种销售成本为60元的商品，据超市调查发现，如果按每件70元销售，一周能销售500件，若销售单价每涨1元，每周销售减少10件，设销售价为每件x 元(x ≥70)，一周的销售量为y 件．(1)写出y 与x 的函数关系式，并求x 的取值范围；(2)设一周的销售利润为W 元，写出W 与x 的函数关系式，并确定当单价在什么范围内变化时，利润W 随着单价x 的增大而减小？(3)在超市对该商品投入不超过18000元的情况下，使得一周销售利润达到8000元，销售单价应定为多少？23．(本题满分12分)在平面直角坐标系中，二次函数y ＝－21x 2＋2x ＋6的图象交x 轴于点A ，B (点A 在点B 的左侧)． (1)求点A ，B 的坐标，并根据该函数图象写出y ≥0时x 的取值范围．(2)把点B 向上平移m 个单位得到点B 1．若点B 1向左平移n 个单位，将与该二次函数图象上的点B 2重合；若点B 1向左平移(n ＋6)个单位，将与该二次函数图象上的点B 3重合．已知m ＞0，n ＞0，求m ，n 的值．九年级数学阶段检测参考答案一、选择题：本大题有10个小题，每小题3分，共30分．二、填空题：本大题有6个小题，每小题4分，共24分． 11．< ；12．y ＝2x 2－8x ＋6； 13．－1； 14．m ≤0；15．x 1＝－1，x 2＝3；16．m ≥l ．三、解答题：本大题有7个小题，共66分．解答应写出文字说明、证明过程或演算步骤． 17．(本题满分6分)解：(1)设此二次函数表达式为y ＝ax 2＋bx ＋c ，由题意列方程组4220,4224,2a b a b c +-=⎧⎪--=⎨⎪=-⎩解得a ＝1，b ＝－1，c ＝－2，所以二次函数表达式为y ＝x 2－x －2.----------------4分 (2)将x ＝4带入表达式得m ＝10.-------------------------6分18．(本题满分8分)解： ∵y=(m-2)+6x 是二次函数，∴m-2≠0且m 2-m=2，解得m=-1.-------------------3分 将m=-1代入，得y=-3x 2+6x=()3132+--x .-----------5分抛物线开口向下，对称轴为x=1 ，抛物线的顶点坐标为 (1,3) .-------8分 19．(本题满分8分)解：(1)∵y 1＝ax 2＋2ax ＋3(a ≠0)过点(－1，4)，∴解得a ＝－1，∴y 1＝－x 2－2x ＋3；-----------------------4分 (2)y 1的顶点坐标为(－1，3－a )，带入y 2得3－a ＝－b ＋a ， ∴2a －b ＝3-----------------------8分 20．(本题满分10分)解：(1)53；-----------------2分(2) y ＝－112x 2＋23x ＋53＝－112(x －4)2＋3，所以实心球在运行中离地面的最大高度是3米；-------------------6分(3) 令－112x 2＋23x ＋53＝0，解得x 1＝－2，x 2＝10， 所以这次测试中成绩能达到优秀．------------------------------10分21．(本题满分10分)解：(1)a＝4； -------------------------3分(2)m＜1或m＞3；--------------------------6分(3)点T(t，2t)符合函数y＝2x，令其与函数y＝－x2＋ax＋b无交点，解得b＜－1．--------------------------------10分22．(本题满分12分)解：(1)由题意得：y＝500－10(x－70)，化简得：y＝－10x＋1200(70≤x≤120)，-----4分(2)W＝(x－60) (－10x＋1200)，化简得W＝－10x2＋1800x－72000(70≤x≤120)，∴W＝－10(x－90)2＋9000x，∴当单价定在90≤x≤120时，利润随着单价的增大而减小．----------------------8分(3)把W＝8000带入，8000＝－10x2＋1800x－72000，解得x＝100或80，x＝100时，y＝200，成本200×60＝12000＜18000，x＝80时，y＝400，成本400×60＝24000＞18000，∴销售定价为每件100元． ----------------------------------------12分23．(本题满分12分)解：(1)令y＝0，则12-x2＋2x＋6＝0，解得x1＝－2，x2＝6，∴A(－2，0)，B(6，0)；------------------------4分由函数图象得，当y≥0时，－2≤x≤6；----------------------6分(2)由题意得，B1(6，m)，B2(6－n，m)，B3(－n，m)，函数图象的对称轴为直线2622x-+==，∵点B2，B3在二次函数图象上且纵坐标相同，∴()622n n-+-=，∴n＝1 ，m＝72，∴m，n的值分别为72，1．-----------12分。

九年级第一学期数学试题考生须知：1. 本卷共三大题，24小题。

本卷满分为150分，考试时间120分钟2. 答题前，请用黑墨水的钢笔或圆珠笔将学校、姓名、学号分别填在密封线内相应的位置上，不要遗漏3. 本卷设试题卷和答题卷，请将答案在答题卷相应的位置上直接答题。

答题必须用蓝、黑墨水的钢笔或圆珠笔（画图请用铅笔），答题时不予许使用计算器参考公式：二次函数y =ax 2+bx +c （a ≠0）图象的顶点坐标是（a4b -ac 4a 2b -2，） 一 选择题（本题共10小题，每题4分，共40分。

每小题只有一个正确答案。

） 1.二次函数y =-2（x +2）2-1的顶点坐标是 （ ）A. （1，2）B.（-2，1）C.（-2，-1）D.（2，-1） 2.如图，在⊙O 中，弧AB =弧AC ，∠AOB =50°，则∠ADC 的度数是（ ） A ．50° B ．40° C ．30° D ．25°3.在抛掷一枚硬币的实验中，某小组做了1000次实验，最后出现正面的频率为49.6%，此时出现正面的频数为（ ）A ．496B ．500C ．516D ．不能确定4.如图，二次函数y =ax 2+bx +c 的图象与x 轴交于（-2，0）和（4，0）两点，当函数值y ＞0时，自变量x 的取值范围是（ ）A ．x ＜-2B ．-2＜x ＜4C ．x ＞0D ． x ＞4 5.如图，AB 为⊙O 的直径，弦CD ⊥AB 于点E ，已知CD =6，EB =1，则⊙O 的半径为（ ） A ．3 B ．4 C ．5 D ．2.6（第2题） （第4题） （第5题）6. 在-2，-1，0，1，2这五个数中任取两数m ，n ，则二次函数y =（x -m ）2+n 的顶点在坐标轴上的概率为（ ）A ．52 B ．51 C ．41 D ．21 7. 下列命题是真命题的是（ ）A.平分弦的直径垂直于弦；B.弧相等，所对的圆周角相等；C.弦相等，所对的圆心角相等；D.圆心角相等，所对的弦相等8.二次函数y =ax 2+bx +c （a ≠0）的部分图象如图所示，图象过点（-1，0），对称轴为直线X =2，下列结论：（1）4a +b =0；（2）9a +c ＞3b ；（3）8a +7b +2c ＞0；（4）若点A （-3，y 1）、点B （21-，y 2）、点C （27，y 3）在该函数图象上，则y 1＜y 3＜y 2；（5）若方程a （x +1）（x -5）=-3的两根为x 1和x 2，且x 1＜x 2，则x 1＜-1＜5＜x 2．其中正确的结论有（ ）个．A ．2个B ．3个C ．4个D ．5个（第8题） （第9题） （第12题） （第16题） 9.在截面为半圆形的水槽内装有一些水，如图水面宽AB 为6分米，如果再注入一些水后，水面上升1分米，此时水面宽度变为8分米。