2020—2021 学年度黑龙江省哈尔滨市第47中八年级上学期 9 月份水平测试数学试卷
黑龙江省哈尔滨市第四十七中学校2023-2024学年八年级上学期9月月考英语试卷(含答案)
哈47中学2023—2024学年度上学期9月份调查问卷初三英语试题一、单项选择(本题共15分，每小题1分)( )1.Which pair of the words with the underlined letters has the same sound?A.though throughB.loud touchC.break great( )2.Which pair of the words with the underlined letters has the same sound?A.wet belowB.most topC.anyone many( )3.Which word of the following doesn't have the same stress as the others?A.althoughB.alwaysC.almost( )4.Which word of the following doesn't have the same stress as the others?A.ProgramB.MaybeC.Decide( )5.Which word of the following doesn't have the same stress as the others?A.PercentB.InternetC.Dislike( )6.--- Jack everything.Did you tell him the secret?---- No, I didn't.A. seems to knowB.seems knowingC.looks to know( )7.What a lovely bookshelf you have! y ou have no books on it?A.WhyB.For whatC.How come( )8.---May I have a glass of milk,please?----Sorry, there's left,but would you like some orange instead?A.nothingB.no oneC.none( )9.As students from Grade 8, we are tired every day. But remember sports are very important and necessary for us.And sports we do, we will be.A.the less, the healthierB.the more,the more healthilyC.the more, the healthier( )10.---Could you tell me ?---Well, at 10 o'clock tomorrow morning.A.when the meeting would startB.when will the meeting startC.When the meeting will start( )11.---What do you think of Mary?---She's a true friend, she always tries different ways she can think oft he best in me.A.bring outB.bringing outC.to bring out( )12.--So hot in the classroom.Would you mind the windows?--Of course not. I'll do it right now.A.not closingB.not openingC.opening( )13.Tom has failed again in four of the five subjects, but he doesn't them.A.care ofB.care aboutC.care for( )14.---Did you watch the match yesterday,Susan?---Of course I did.Our team the Sun and t he match.A.beat;wonB.won;beatC.won;won( )15.What difference a day makes! My parents and I decided the sun rising together.A.the;seeingB./;to seeC.a;to see二、完型填空(本题共10分，每小题1分)It's always a happy moment when you get some pocket money ( 零花钱).But have you everthought about 6 to spend your pocket money wisely?Here is some advice.Make a list.When you get your pocket money,don't get too 17 .We all have a lot of things that we want. But do you really need them? That's why it is necessary to make a list 18 you spend money. Start with the thing you want most.You can also write down how much it costs or how important it is in your life. 19 ,y ou will see if it is really worth buying.Help others.How about being more selfless( 无私的)and using your pocket money to help others? We all know that there are many people in the world who are in need of our help. 20 brings out the best in us and is one of the greatest joys in our lives. So think about using your pocket money to do 21 ,and feel how you can make a difference.22 as much as you can.There is an old saying that "Money doesn't grow on trees."If you spend all your pocket money right away, you'll have no money until your next"pay day".A wallet 23 might not be the best place to save money because it may make it 24 for you to spend your money.Get a piggy bank( 储蓄罐 )or ask your parents to start a savings account ( 账户 )for you. Someday when you look back,you'll get a strong feeling of achievement by saving so much money by yourself!25 you spend your pocket money in a wise way.you can make your life colorful and meaningful.( )16.A what B.how C.where( )17.A.excited B.excite C.exciting( )18.A.after B.before C. whether( )19.A.By this way B.On this way C. In this way( )20.A.Helping others B.Help others C.Helped others( )21.A.nothing helpful B.helpful something C.something helpful( )22.A.Spend B.Save C.Waste( )23.A.sometimes B.some times C.some time( )24.A.harder B.easier C. more easily( )25.A.As long as B.As well as C.As soon as三.阅读理解(本题共20分，每小题1分)(A)10-year-old Bill is being interviewed on TV about his cooking.Bill,when did you start cooking?When I was four,I became interested in cooking.I started helping my mum in the kitchen when I was five.At the age of six,I could make vegetable salad.One year later,I could make a fruit pie all by myself.What's the most effective(有效的)way to get good at cooking?I don't go to cooking classes.Sometimes I watch videos on the phone.I often read books about cooking. Actually, I think the most effective way to improve my cooking is trying it again and again.If it is no good,I'll do it differently next time.What do your parents think of your cooking?They're glad that they don't have to make dinner every day, and they enjoy my cooking -usually! But,you can't make everyone happy all the time.Finally,what's it like being on TV?It's interesting. In fact, I really enjoy myself making the shows.They're watched by millions, but I still find it strange when people I don't know say hello to me in the street.根据语言材料内容选择最佳答案。
哈尔滨是四十七中学2021届毕业学年9月份阶段测试英语试卷+答案
哈四十七中学2021届毕业学年9月份阶段测试英语试卷出题教师：周艳华审题教师：周丽华考生须知：1.本试卷满分为100分，考试时间为100分钟。
2.答题前，考生先将自己的“姓名”、“考号”、“考场”、“座位号”在答题卡上填写清楚。
3.请按照题号的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；在草纸、试题纸上答题无效。
4.选择题必须使用2B铅笔填涂；非选择题必须使用0.5毫米的黑色字迹的签字笔书写，字体工整、笔记清楚。
5.保持卡面整洁、不要折叠、不要弄脏、不要弄皱，不准使用涂改液、修正带、刮纸刀。
第Ⅰ卷一、单项选择（本题共20分，每小题1分）选择最佳答案。
()1.Which pair of the words with the underlined letters has a different sound?A.pleasureB.dealC.steal()2.Which pair of the words with the underlined letters have a different sound from the others?A.surface faceB.without thoughC.coin avoid()3.Which of the following words doesn’t have the same stress(重音）as the others?A.ProductpleteC.Translate()4.--Tom’s made_____great progress in the exam.--So he has.It’s hard to believe he______have difficulties in school.A.a,used toB./,used toC.some,was used to()5.--It’s exciting to have___holiday during the National Day this year.What’s your plan for it?--I’m not sure.Maybe it depends on my exam results.A.a eight-dayB.eight day’sC.an eight-day()6.--It’s said Mulan_______since almost a month ago.Why not go and see it tonight?--I’ll go with you if I finish the work early.A.has begunB.beganC.has been on()7.Zhong Nanshan,a hero in my heart,was rewarded with“the Medal of the Republic”last month._____exciting news it is!I think he is the____of our whole nation.A.What an,proudB.How,prideC.What,pride()8.--Tim,I’ll help you with your English.--That’s______what I need these days.It’s so nice of you!A.exactlyB.generallyC.specially()9._______I know,products_____Germany are popular with people all over the world because of its high quality.A.As far as,made inB.As long as,are made inC.As soon as,made by()10.The girl__________an English song in the next room is Tom’s sister.A.who is singingB.is singingC.sang()11--Could you tell me_____?I must find him.--Sorry,I have no idea.But he was here just now.A.where Tom wasB.where has Tom goneC.where Tom is()12.--I found________to communicate with foreigners in English.--Don’t worry.The more you speak,the better you will be.A.its difficultB.it was difficultyC.it difficult()13.--I hear you will hold a party at home.--_____my sister’s______birthday,my mom makes it next Friday.Would you like tocome?A.Celebrate,ninthB.To celebrate,ninthC.Celebrating,the nineth()14.--It’s a pity that the flowers are dying.--You must forget____them often.As a matter of fact,most flowers needs____everyweek.A.watering,wateringB.to water,wateringC.to water,to water()15.--You look tired and sleepy,Tom.What happened?--I didn’t go to bed_____all my homework was finished.I slept for only six hours last night.A.afterB.whenC.until()16.--I wonder how I can pass the exam?--Take it easy.______you are,the better grades you will getA.The more carefullyB.the less carelessC.The most careful()17.--There are too many natural disasters happening in2020.How can we_____these problems?--It’s not enough to just save plants and animals.Maybe we need to change our livingstyles.A.deal withB.do withC.part with()18._______are a special form of traditional art in China,which were used to ask for help when in trouble before.A.Paper cuttingB.Sky lanternsC.Chinese clay art()19.Life is not always full of roses.To deal with all kinds of unhappy things,we‘d better _______in our daily lives.1Stay indoors alone 2Learn to ask for help in time 3Shout at others to let anger out 4Listen to music to relax ourselves 5Offer to help othersA.①④⑤B.②④⑤C.②③④()20.We’ve made a survey among 600students in Grade Nine about what they do in theirfree time.Two thirds of them have a hobby.According to the table below,we know there are ______students who like sports.A.120B.80C.160二、完形填空（本题共10分，每小题1分）We may have many difficulties in life,and sometimes it’s even unfair for someone,but it 21how you face them.Sally is a student from a university,she made a 22last August.She decided to take her grandmother from their hometown and live with her in a rented room(出租房）near her school.Sally’s family 23a lot in the past few years.Her grandmother lost her legs and she could walk only with a stick.Her father died because of illness.Sally’s mother was so sad that she lost the 24and didn’t want to take care of others.“This was the only choice.No one else could care for my grandma,”Sally explained and she couldn’t leave her grandma in the hometown where 25could look after her.A room with two beds,a desk and a table is their new home.The room 26her several hundred yuan every month.27make money,Sally works in a supermarket after class and spends the money supporting the family.“I was brought up by my grandma,and now it’s my turn to take care of her.”said Sally.In the eyes of Sally’s teacher,the girl is a(n)28student.“29taking care of her grandmother takes her lots of energy,Sally has still tried to stay on top of all her courses.She is even preparing her an English singing contest,”her teacher said.Sally even 30help from others.“It’s kind of like only getting without giving,”she explained.At present,the girl is able to support the home with her weak shoulder.根据短文内容选择最佳答案。
黑龙江省哈尔滨市南岗区第四十七中学2023-2024学年八年级上学期月考数学(五四制)试题
黑龙江省哈尔滨市南岗区第四十七中学2023-2024学年八年级上学期月考数学（五四制）试题
学校:___________姓名：___________班级：___________考号：___________
一、单选题
再打开，折痕为l 3．已知CE =2cm ，则纸条原长为（）cm
A ．18
B ．16
C ．14
D ．12
二、填空题
三、解答题
四、填空题
五、解答题
19．解下列方程
(1)351
x x -=+
x=_________，y=_________；
(2)如图4，用“铺地锦”计算两个数相乘，求25．已知长方形ABCD的长AB为4，宽
、两边与数轴重合，且点3．如图1所示，AB EF
(1)当长方形ABCD从原点出发，以2个单位/秒的速度沿数轴向右匀速运动．长方形ABCD完全通过长方形EFGH时，所需时间为______秒；
(2)在（1）的条件下，在运动过程中，当长方形ABCD与长方形EFGH重合面积为2个单位面积时，需要运动多少秒？
(3)在（1）的条件下，长方形ABCD开始运动的同时，长方形EFGH以1个单位/秒的速度沿数轴向右匀速运动，设点A和点F运动后对应的点为A'和F'，当4
A F''=时，此时点F'在数轴上表示的数为多少？。
黑龙江省哈尔滨市第四十七中学八年级英语9月学情检测试题 人教新目标版五四制
哈尔滨市第四十七中学八年级9月份质量检测英语试题一、单项选择（本题共20分，每小题1分）( )1. Boys and girls, believe in yourselves. The _______ you are, the better grades you’ll get.A. more carefulB. more carefullyC. most carefully( )2.-Look at the man standing under the tree. Do you know what his job is?-Oh. He is _______ expert on pandas. Looking after pandas is his work.A. aB. anC. /( )3.-Can you finish the work in an hour?-No, I don’t think so. It’s difficult _______ me _______ it in such a short time.A. for, to finishB. of, to finishC. for, for finishing ( )4.-How did you feel on your first day of school?-I felt very _______ because I had trouble _______ with chopsticks.A. excited, to eatB. embarrassed, eatingC. boring, eating( )5.-My English is very poor. I don’t know _______.-You just need to keep practicing.A. what to do itB. how to doC. what to do( )6.-I’m so tired that I don’t want to talk to _______.-After _______ a nap, you’ll feel better.A. anyone, takingB. someone, you takeC. no one, you took( )7.The old man lives in a small village _______. But he never feels _______.A. lonely, aloneB. alone, lonelyC. lonely, lonely( )8.-Tom, you’re late again. What’s the matter with you?-I’m sorry. My watch _______.A. isn’t workB. are brokenC. doesn’t work( )9.-Do you like coffee?-I _______ lots of coffee every day. But now I _______ tea instead.A. used to drink, am used to drinkingB. got used to drinking, used to drinkC. used to drinking, got used to drink( )10.-What nice weather! Let’s go jogging after school.- Sure！_______？Jogging is good for our health.A. WhyB. Why notC. When( )11.- _______ the online school, Wang Huansheng got a good education.-Yeah. Online classes are very convenient _______ the children like him.A. Thanks for, forB. Thanks to, forC. Thanks for, to( )12.-How can I make new friends?-To make new friends, you’re _______ communicate with others as often as possible.A. shouldB. ought toC. supposed to( )13. –I feel like _______ a new computer. But I don’t know anything about computers. -It’s easy. You can use the Internet _______ some information about computers.A. to buy, for findingB. buying, to findC. buying, finding( )14. -Do you know when he _______ to play with us tomorrow?-Sorry, I don’t know. But I think he will come as soon as he _______ his work.A. will come, finishesB. comes, will finishC. will come, will finish ( ) 15. In some western countries, people like to say something good to show their kindness when you meet them. You can express thanks to them. Therefore, which situation fits western customs?A. In the street: Student A: Oh, Lily. You look nice in the new dress.Student B: Thank you. The color is my favorite.B. In the office: A man: Oh, Lily. How much is the new dress?A woman: It's $80. It's a little expensive.C. In the shop: A man: Oh, Lily. Did you buy the dress over there? Its color is too dark.A woman: But my mother may like it.( )16.In order to make our school life happier and much more meaningful(有意义的)，we are supposed to_______.① listen to teachers carefully in class② laugh at others when they do something wrong③ take part in as many activities as possible④ listen to MP3 as much as we like⑤ help those who are in troubleA.①②③B.①④⑤C.①③⑤( )17. Xiaoming has four after-class lessons from 8:30a.m. to 4:30 p.m. every Sunday. How long is his lunch hour according to the chart below?A. An hourB. Half an hourC. 90 minutes( )18. Which pair of the words with the underlined letters has the same sound?A. spell pressB. plug usedC. nap paper( )19. In the following words, which underlined letter has a different sound from the others?A. subjectB. buttonC. confused( )20. Which word of the following has a different stress from the others?A. expertB. returnC. connect二、完形填空（共10分，每小题1分）Middle school days are both fun and busy. In China, students 21 their days in class, listening to the interesting and sometimes boring words of the teacher. They spend the short breaks(课间) running, playing, and shouting happily 22 going back to the classroom again. But 23 should students spend their free time outside school?In Western countries, it is common(普通的) for students to have a part - time job after school and 24 weekends. Students can make their own money and learn more about the "real world". They enjoy the independence（独立）and of course money, and parents enjoy the quiet house. However, it seems that, in China, parents 25 their children's studies too much. They are so worried that they would prefer to see their children 26 most of their free time studying and getting ready for all those exams. It is natural (自然的) for parents to feel that way in China, but I believe the answer lies in balance(平衡). Sometimes, western 27 work long hours after school to make money, and so they become 28 tired to listen in class or have no time for homework. But Chinese students spend so much time on their studies that all else becomes less important until they want a new MP4 player.29 , find a good and healthy balance! If you have a part - time job, you'll be 30 and your parents will also be happy because you're spending the money you make and not theirs!( ) 31.A.are used to spend B. used to spending C. are used to spending ( ) 32.A.while B. after C. before( ) 33.A.why B. how C. what( ) 34.A.on B. in C. to( ) ugh at B. worry about C. point out( ) 36.A.spending B. using C. paying( ) 37.A.parents B. teachers C. school students( ) 38.A. very B. too C. so( ) 39.A.Therefore B. But C. Because( ) 40.A. sad B. happy C. bored三、阅读理解（本题共20分，每小题1分)( A )Tom was a college student. He often made excuses(借口) not to take classes. Also, he spent much of his free time playing computer games. He never went to the library to study.How time flew! At the end of the term(学期), there was one important thing that he was afraid of--the final exam. “What should I do?” Tom walked up and down in the room the day before the exam. He was keyed up. Suddenly, he thought of an idea.The next morning, Tom went into the exam room very early. He found a young man who looked so confident(有信心的) and took a seat next to him. “Hey you!” Tom greeted(打招呼). “W hat?” The young man asked. "Can you help me?" Tom begged (恳求)，“Please let me copy your paper during the exam. I have to depend on(依靠) you!” When hearing his words, the young man just smiled but said nothing.When the bell rang, the young man stood up at once and came to the front, saying, " ______ Now I will hand out the papers to all of you and collect(收集) them in one hour." Tom sat there with his mouth wide open.根据短文内容选择最佳答案。
黑龙江省哈尔滨市47中学2024-2025学年八年级上学期9月月考英语试卷(含答案)
2024-2025学年度（上）初三学年9月份阶段性素养展示英语试卷一、单项选择（本题共10分）1. Boys and girls, we all know that _________ you work, the better results you will get.A. the more harderB. the more hardlyC. the harder2. When you are tired with studying, you can close your eyes and do eye _________ to have a rest.A. exerciseB. exercisesC. exercising3. With the help of Chinese teacher, it's _________ for us students to understand the passage.A. clear enoughB. enough clearlyC. clearly enough4. —You have stayed in China for a long time. How many new friends did you make?—_________A. NoneB. NothingC. Nobody5. —_________ do you go shopping with your mother in a week?—Twice.A. How oftenB. How soonC. How many times6. —I decide _________ the lonely old people in the neighborhood this Saturday. Would you like to join me? —Yes, I'd love to.A. visitingB. to visit toC. to visit7. —To our excitement, Quan hongchan _________ two gold medals in Paris Olympics.—Yes, she _________ all the competitors as well as Chen Yuxi.A. beat, wonB. won, beatC. won, won8. —_________ you are late again? I waited here for half an hour.—Don't you know it's time for working? There was the heavy traffic on the road.A. WhyB. How comeC. What reason9. —_________ he is very tired, _________ he still studies hard at home.—I think we should learn from him.A. Although, /B. Though, butC. However, but10. —I heard many soldiers went to Hainan after typhoon to help the local people rebuild their homes.—Yes. Thanks for their help. But it's not enough. They still need _________ soldiers.A. another 200B. more 200C. 200 another二、完形填空（本题共10分）Once there was a king who told some of his people to dig a pond (池塘) . The king then told his people that one person 11 each family had to bring a glass of milk during the night and put it into the pond. So, by the morning, the pond should be 12 of milk.After 13 the order, everyone went home. As one man got ready for his milk, he thought that since everyone was bringing milk, he would just pour a glass of 14 into the pond instead of it. 15 it was dark at night, no one would notice it, so he quickly went and put the water into the pond and 16 home.In the morning, the king went to check the pond. To his 17 , the pond was only filled with water! What happened? Yes! Everyone had the 18 idea as that man. They all thought, “I don't have to waste my milk. Someone else will do it. ”Dear friends, when you plan to help poor people in trouble, do not think that 19 will take care of it. Instead, it starts with you. If you don't do it, no one else will, so change yourself and make a 20 .11. A. with B. from C. on12. A. filled B. empty C. full13. A. giving B. listening C. receiving14. A. water B. milk C. juice15. A. If B. When C. Before16. A. left B. came C. returned17. A. surprise B. excitement C. joy18. A. different B. similar C. same19. A. others B. the other C. none20. A. face B. mistake C. difference三、阅读理解（本题共50分，每小题2分）。
黑龙江省哈尔滨市四十七中学2024-2025学年八年级上学期9月月考物理试题
黑龙江省哈尔滨市四十七中学2024-2025学年八年级上学期9月月考物理试题一、单选题1．以下说法中符合实际的是（）A．某初中生站在家中的体重秤上示数为50kgB．人体正常体温为50℃C．学生书桌高约200cmD．人正常步行速度约为15m/s2．图中所列仪器用于测量时间的是A．卷尺B．游标卡尺C．螺旋测微器D．挂钟3．下列长度单位换算过程合理的是（）A．5.7m=5.7×100cm=5.7×102cm B．5.7m=5.7m×100cm=5.7×102cmC．5.7m=5.7m×100=5.7×10²cm D．5.7m=5.7×100=5.7×10²cm4．哈尔滨市的龙塔是亚洲第一高铁塔，游人乘电梯登上龙塔就可以看到哈尔滨市美丽的景色，在游人乘坐电梯的过程中，下列说法正确的是（）A．以电梯内的某一乘客为参照物，其它乘客是运动的B．以电梯为参照物，所有乘客都是运动的C．以龙塔为参照物，乘客是运动的D．以路上行驶的汽车为参照物，乘客是静止5．《吕氏春秋·察今篇》记载了刻舟求剑的故事，当中有这样的文句:“舟已行矣，而剑不行，求剑若此，不亦惑乎!”文中对舟和剑运动状态的描述，可选择的共同参照物是（）A．舟中人B．舟C．剑D．江岸6．用一个轮子沿曲线滚动，测出曲线的长度，测量中必须知道（）A．轮子的颜色和半径B．轮子的直径和滚过的圈数C．只需轮子滚动的圈数D．轮子的重量和滚过的圈数7．生活中大部分能量来自太阳，各种形式的能量都不是孤立的，它们可以在一定条件下发生转化，下面四幅图从电能来源到利用，排列顺序正确的是（）A．℃℃℃℃B．℃℃℃℃C．℃℃℃℃D．℃℃℃℃8．在通常情况下，你平静时的脉搏1min跳动的次数约为（）A．10次B．20次C．70次D．160次9．以下不属于科学探究的环节的是（）A．科学幻想B．提出问题C．猜想与假设D．设计实验、制订计划10．水中的旗鱼，每小时游100km，陆地上的猎豹，每秒可跑31m，空中飞行的雨燕，每分钟能飞行3km，比较它们速度的大小（）A．猎豹最大B．旗鱼最大C．雨燕最大D．三者一样大二、多选题11．如图所示，用两个不同的刻度尺测同一物体的的长度，对于这一测量，下列说法中正确的是（）A．两个刻度尺的分度值相同B．两测量值的准确程度不同C．两次测出的物体的长度一般不同D．甲尺的测量结果一般小于乙尺的测量结果12．一辆长20m的货车，以72km/h的速度匀速通过长为100m的大桥，下列说法中正确的是（）A．货车完全在桥上行驶的时间是5sB．货车完全在桥上行驶的时间是4sC．货车通过大桥所用的时间是6sD．货车通过大桥所用的时间是7s三、填空题13．测量是一个将与公认的基准进行比较的过程.2020年12月8日，习近平主席和尼泊尔总统班达里互致信函，共同宣布珠穆朗玛峰的最新测定高程为8848.86 。
黑龙江省哈尔滨市南岗区第四十七中学校2020-2021学年上学期九年级8月数学(五四制)练习题
班级姓名…………………………………………………… 装 ………………………… 订 ……………………线 …………………………………………×××××××××××××××××××××密封线内不要答题××××××××××××××××××××××哈四十七中学毕业学年8月数学练习题 时间： 8月29日 一、选择题（每题3分，共计30分） 1．方程x 2=2x 的根是（ ） A. x 1=x 2=2 B. x 1=0，x 2=1 C. x 1=－2，x 2=0 D.x 1=2，x 2=0 2．下列表达式中，表示y 是x 的反比例函数的是（ ） A.21y x = B.53y x = C.11y x =- D.2x y = 3．如果两个相似多边形面积的比为1：5，则它们的相似比为（ ） A ． 1：25 B ． 1：5 C ． 1：2.5 D ． 1： 4．下列三角形中，不是直角三角形的是（ ） A.三个角度数之比为1∶2∶3 B.三条边长之比为1∶2∶5 C.三条边长之比为1∶2∶4 D.三条边长之比为3∶4∶5 5．如图，在▱ABCD 中，点E 是边AD 的中点，EC 交对角线BD 于点F ，则EF ：FC 等于（ ） A ．3：2 B ．3：1 C ．1：1 D ．1：2 6.已知反比例函数的图象位于第一、第三象限，则的取值范围是（ ） A ． B ． C ． D ． 7.在矩形ABCD 中，E 、F 分别是CD 、BC 上的点，若∠AEF=90°， 则一定有（ ） A. ΔADE ∽ΔAEF B. ΔECF ∽ΔAEF C. ΔADE ∽ΔECF D. ΔAEF ∽ΔABF 8.已知四边形ABCD 是平行四边形，下列结论中不正确的是（ ）. A.当AB BC =时，它是菱形 B.当AC BD ⊥时，它是菱形 C.当90ABC ∠=︒时，它是矩形 D.当AC BD =时，它是正方形 9．关于x 的一元二次方程x 2＋kx-1=0的根的情况是（ ） A.有两个不相等的实数根 B.有两个相等的实数根 C.没有实数根 D.不能确定 10． 甲、乙两车分别从A 地将一批物品运往B 地，再返回A 地，如图表示两车离A 地的距离s （千米）随时间t （小时）变化的图象，已知乙车到达B 地后以30千米/小时的速度返回. 则下列说法正确的有（ ） ①甲车出发1.5小时后被乙车追上；②从A 地到B 地的途中乙车速度是甲车的2倍；③甲车与乙车在距离B 地4.5千米处迎面相遇； ④甲车从B 地返回的速度大于每小时48千米时才能比乙车先回到A 地 A. 1个 B. 2个 C. 3个 D. 4个 二、填空题（每题3分，共计30分） x k y 2-=k 2>k 2≥k 2≤k 2<k11.当x____________时,二次根式在实数范围内有意义. 12．计算 ．13.如图，平行四边形的对角线相交于点O ，且两条对角线的和为36cm ，AB 的长为5cm ，则OCD 的周长为_________ cm.14、已知：－2是关于x 的一元二次方程x 2＋x －a=0的一个根，则a 的值为 ．15.如图，菱形OABC 的顶点O 是原点，顶点B 在y 轴上，菱形的两条对角线的长分别是6和4，反比例函数的图象经过点C ，则k 的值为 ．16.政府出台政策促使药品价格下调.某种药品连续两次降价后，由每盒100元下降至64元，这种药品平均每次降价的百分率是___________.17．如图：矩形ABCD 的对角线AC 、BD 相交于点0，过点O 作OE ⊥AC 交AB 于E,若BC=4，EB=3，则△AOE 的面积为 ．18.如图，将边长为6cm 的正方形ABCD 折叠，使点D 落在AB 边的中点E 处，折痕为FH ，点C 落在Q 处，EQ与BC 交于点G ，则△EBG 的周长是 cm19.△ABC 中，∠B=30°，AB=3,AC=1，求线段BC 的长为20.如图在菱形ABCD 中，菱形ABCD 的边长为,BD=4,点E 在DB 的延长线上，满足∠DAE=45°， 则BE=三、解答题(21～24题各6分．25～26题各8分．27、28题各l0分。
黑龙江省哈尔滨市第四十七中学2020-2021学年上期8月份阶段测试九年级数学试卷
O DCBA 第5题图第9题图哈四十七中学2021届毕业学年8月份阶段测试数 学 试 卷一、选择题（每题3分，共计30分）1．-2的相反数是（ ）（A ）2 （B ）-2 （C ） 12 （D ）12- 2．下列运算一定不正确的是 （ ）（A ）4a ﹣a=3a （B ）a 10÷a 2=a 8（C ）a 3•a 4=a7（D ）a 2+a 3=a 53.下列各图形中，是轴对称图形但不是中心对称图形的是（ ）（A ） （B ） （C ） （D ） 4.正比例函数 y=2kx 的图象经过点( -1，3 )，则k 的值为（ ）（A ）3 （B ）23 （C ） 23- （D ）3-5.如图所示，在□ABCD 中，对角线AC 、BD 交于点O ，•下列式子中一定成立的是（ ）（A ）AC ⊥BD （B ）OA=OC （C ） AC=BD （D ） AO=OD6．在Rt △ABC 中，∠C ＝90°，∠B ＝α，AB ＝5，则AC 的长为（ ） （A ）αtan 5（B ）αcos 5（C ）αcos 5 （D ）αsin 5 7．通过平移y=-2x 的图象，可得到y=-2(x-1)+3的图象，平移方法正确的是（ ） （A ）向左移动1个单位，再向上移动3个单位 ；（B ）向右移动1个单位，再向上移动3个单位； （C ）向左移动1个单位，再向下移动3个单位； （D ）向右移动1个单位，再向下移动3个单位。
8.某商品经过两次连续降价，每件售价由原来的55元降到了35元．设平均每次降价的百分率为x ，则下列方程中正确的是（ ）.（A ）55 (1+x )2=35 (B) 35(1+x )2=55 (C)55(1－x )2=35 (D)35(1－x )2=55第9题图9.如图，将矩形ABCD 沿EF 折叠，使顶点C 恰好落在AB 边的中点C`上．若AB=6，BC=9，则BF 的长为（ ） （A ）3 (B) 4 (C) 5 (D) 610.如图,在平行四边形ABCD 中,点E 是AB 上任意一点,过点E 作EF ∥BC 交CD 于点F,连接AF 并延长交BC 的延长线于点H ，则下列结论中错误的是（ ）。