1、数学试题 第 1页(共 6 页)绝密启用前亭湖盐都大丰阜宁 2022 年春学期第二次学情调研九 年 级 数 学 试 卷注意事项:1本次考试时间为 120 分钟,卷面总分为 150 分考试形式为闭卷2本试卷共 6 页,在检查是否有漏印、重印或错印后再开始答题3所有试题必须作答在答题卡上规定的区域内,注意题号必须对应,否则不给分4答题前,务必将姓名、准考证号用 0.5 毫米黑色签字笔填写在试卷及答题卡上一、选择题(本大题共有 8 小题,每小题 3 分,共 24 分在每小题所给出的四个选项中,只有一项是符合题目要求的,请将正确选项的字母代号填涂在答题卡相应位置上)1实数2022是2022的A绝对值B
2、相反数C倒数D以上都不正确2“疫情就是命令,防控就是责任”,面对疫情,各地积极普及科学防控知识下面是科学防控知识图片,其中图案是轴对称图形的是ABCD3下列各式计算正确的是A224235aaaB33( 2)6abab C22(3)(3)9aba babD33( 2 )2aaa 4“碧玉妆成一树高,万条垂下绿丝绦”盐城每年到 4、5 月份,人们在欣赏柳绿桃红的同时,也被飞舞的柳絮所烦恼,据了解柳絮纤维的直径约为 0.00105cm,则 0.00105 用科学记数法可表示为A1.05103B1.05103C1.05104D1051055如图,由几个相同的小正方体搭成一个几何体,从上面观察该图形,得
3、到的平面图形是ABCD第 5 题图第 8 题图6甲、乙、丙、丁四人各进行了 6 次跳远测试,他们的平均成绩相同,方差分别是 S甲20.65,S乙20.55,S丙20.50,S丁20.45,则跳远成绩最稳定的是A甲B乙C丙D丁数学试题 第 2页(共 6 页)7“劳动创造世界”,劳动教育已纳入国家人才培养全过程某学农基地加大投入,建设新型农场,该农场一种作物的亩产量两年内从 400 千克增加到 484 千克设平均每年增产的百分率为x,则可列方程为A400(1 2 )484xB2400(1)484xC400(1)484xD2400(1)484x8一天早上,小华沿花园匀速按顺时针方向散步,已知小华从花
4、园的点A处开始散步,将小华看作动点B,花园的中心为O设在散步过程中,小华,点O,点A所形成的夹角()AOB的度数为y(此处 y180) ,y随时间x变化的图象如图,则花园的形状可能是ABCD二、填空题(本大题共有 8 小题,每小题 3 分,共 24 分不需写出解答过程,请将答案直接写在答题卡的相应位置上)9 若代数式2xx 有意义,则实数x的取值范围是10分解因式:224xy11关于x的一元二次方程2210kxx 没有实数根,则k的取值范围是12如图,在已知的ABC 中,按以下步骤作图:分别以 B,C 为圆心,以大于12BC 的长为半径作弧,两弧相交于两点 M,N;作直线 MN 交 AB 于点
5、 D,连接 CD若 CDAC,A50,则ACB第 12 题图第 13 题图第 14 题图13一个不透明的袋子里装有黑白两种颜色的球共 40 个,这些球除颜色外都相同小贤从袋子中随机摸一个球记下颜色后放回,不断重复,并绘制了如图所示的统计图,则这个袋中黑球的个数最有可能是14如图,在扇形 AOB 中,点 C 在线段 OB 上,连接 AC,将AOC 沿 AC 所在直线翻折,使得点 O 的对应点 D 恰好落在AB上,若 OA2,则图中阴影部分的面积为数学试题 第 3页(共 6 页)15为增强学生体质,某学校将“抖空竹”引人阳光体育一小时活动图 1 是一位同学抖空竹时的一个瞬间,小明把它抽象成图 2
6、的数学问题:已/ABCD,80EAB,110ECD则E的度数是图 1图 2第 14 题图第 15 题图16如图,四边形 ABCD 为矩形,AB10,AD6,若 P 为矩形 ABCD 内一点,且满足APB90,连结 C、P 两点,并延长 CP 交直线 AB 于点 E当 P 是线段 CE 的中点时,则 BE三、解答题(本大题共有 11 小题,共 102 分请在答题卡指定区域内作答,解答时应写出文字说明、推理过程或演算步骤)17 (本题满分 6 分)计算:238| 6| 2 18 (本题满分 6 分)化简:22144(1)11xxxx19 (本题满分 8 分)如图,AD 是ABC 的中线,tanB1
7、3,cosC22,AC2求:(1)BC 的长;(2)sinADC 的值20 (本题满分 8 分)小红的爸爸积极参加社区抗疫志愿服务工作根据社区的安排,志愿者被随机分到A组(体温检测) 、B组(便民代购) 、C组(环境消杀) (1)小红的爸爸被分到B组的概率是;(2)某中学王老师也参加了该社区的志愿者队伍,他和小红爸爸被分到同一组的概率是多少?(请用画树状图或列表的方法写出分析过程)第 19 题图数学试题 第 4页(共 6 页)21 (本题满分 8 分)已知( 4,10)Am、( , 4)B n 两点是一次函数ykxb和反比例函数myx图象的交点(1)求一次函数和反比例函数的解析式;(2)连接
8、OA、OB,求AOB 的面积第 21 题图第 22 题图22 (本题满分 10 分)如图,在平行四边形ABCD中,点O是BC的中点,连接DO并延长,交AB延长线于点E,连接 BD,EC(1)求证:四边形BECD是平行四边形;(2)若50A ,则当ABD时,四边形BECD是菱形23 (本题满分 10 分)甲、乙、丙三个家电厂家在广告中都声称,他们的某种电子产品在正常情况下的使用寿命都是 8 年,经质量检测部门对这三家销售的产品的使用寿命进行跟踪调查,统计结果如下: (单位:年)甲厂:4,5,5,5,5,7,9, 12,13,15乙厂:6,6,8,8,8,9,10,12,14,15丙厂:4,4,4
9、,6,7,9,13,15,16,16请回答下面问题:(1)填空:平均数众数中位数甲厂6乙厂9.68.5丙厂9.44(2)这三个厂家的销售广告分别利用了哪一种表示集中趋势的特征数?(3)你是顾客,你买三家中哪一家的电子产品?为什么?数学试题 第 5页(共 6 页)24 (本题满分 10 分)某冬奥会纪念品专卖店计划同时购进“冰墩墩”和“雪容融”两种玩具据了解,8 只“冰墩墩”和 10 只“雪容融”的进价共计 2000 元;10 只“冰墩墩”和 20 只“雪容融”的进价共计 3100 元(1)求“冰墩墩”和“雪容融”两种玩具每只进价分别是多少元;(2)若“冰墩墩”和“雪容融”两种玩具每只售价分别是
10、 200 元、100 元该专卖店计划恰好用 3500 元购进“冰墩墩”和“雪容融”两种玩具(两种均买) ,请帮助专卖店设计采购方案,使得总利润最大25 (本题满分 10 分)如图,AB 是O 的直径,点 C 在O 上,ABC 的平分线与 AC 相交于点 D,与O过点 A 的切线相交于点 E(1)猜想EAD 的形状,并证明你的猜想;(2)若 AB8,AD6,求 BD 的长第 25 题图第 26 题图26 (本题满分 12 分)若二次函数22abxaxy的图像经过点 A(1,0) ,其中a,b为常数(1)用含有字母a的代数式表示抛物线顶点的横坐标;(2)点 B(21,1) 、C(2,1)为坐标平面
11、内的两点,连接 B、C 两点1若抛物线的顶点在线段 BC 上,求a的值;2若抛物线与线段 BC 有且只有一个公共点,求a的取值范围数学试题 第 6页(共 6 页)27 (本题满分 14 分)以下虚线框中为一个合作学习小组在一次数学研讨中的过程记录,请阅读后完成虚线框下方的问题 14试题分析试题分析()如图 1,在 RtABC 中,BAC90,ABAC,D 是ABC 外一点,且 ADAC求BDC 的度数第 27 题 图 1第 27 题 图 2小明:小明:我发现试题中有三个等腰三角形,设ADB=,易知CAD=90-2,又因为ADAC,得ADC=45+,即可算出BDC 的度数小丽:小丽:我发现 AB
12、ACAD则点 B、C、D 到点 A 的距离相等,所以点 B、C、D在以点 A 为圆心,线段 AB 长为半径的圆上猜想证明猜想证明()如图 1,在 RtABC 中,BAC90,ABAC,点 D、A 在 BC 同侧猜想:若BDC= ,则点 D 在以点 A 为圆心,线段 AB 长为半径的圆上对于这个猜想的证明,小华有自己的想法:对于这个猜想的证明,小华有自己的想法:若ABC 的外接圆为A,根据点与圆的位置关系,知道点 D 可能在A 内,或点 D 在A 上,或点 D 在A 外故,只要证明点 D 不在A 内,也不在A外,就可以确定点 D 一定在A 上()进一步猜想:如图 2,在ABC 中,BAC,ABA
13、C,点 D、A 在 BC 同侧若BDC= ,则点 D 在以点 A 为圆心,线段 AB 长为半径的圆上()对()中的猜想进行证明问题 1完成()中的求解过程;问题 2补全猜想证明猜想证明中的两个猜想: () ; () ;问题 3证明上面()中的猜想;问题 4如图 3 为某大型舞台实景投影侧面示意图,BOC90,点 A 处为投影机,投影角BAC45,折线 BOC 为影像接收区若影像接收区最大时(即OBOC 最大) ,投射效果最好,请直接写出影像接收区最大时 OB 的长 第 27 题 图 3英语试卷第 1页 共 8页亭湖盐都大丰阜宁亭湖盐都大丰阜宁 2022 届九年级第二次模拟检测届九年级第二次模拟
14、检测英 语 试 卷注意事项:1. 本试卷包含第卷选择题(第 1-50 题)、第卷非选择题(第 51-76 题)两部分。本次考试时间为 100 分钟, 卷面总分为 120 分。考试形式为闭卷。2. 本试卷共 8 页, 在检查是否有漏印、重印或错印后再开始答题。3. 所有试卷必须作答在答题卡上规定的区域内, 注意题号必须对应, 否则不给分。4. 答题前, 务必将姓名、准考证号用 0.5 毫米黑色签字笔填写在试卷及答题卡上。第第 卷卷(选择题选择题, 共共 70 分分)一、单项选择(共一、单项选择(共 15 小题,每小题小题,每小题 1 分分, 计计 15 分)分)从 A、B、C、D 四个选项中选出
15、一个可以填入句中空白处的最佳答案。1. -Is Russia _European country?-Yes, though most of it lies in Asia.A.aB. /C. anD. the2. Her job is not up to the leaders standard _ she has worked at it for a week.A. sinceB. althoughC. ifD. unless3. The Queqiao satellite(卫星) has been a _ bridge between the Earth and the Moon.A. c
16、ompetitionB. contributionC. celebrationD. communication4. -Why is the price of this camera more than 10,000 yuan?-Well, good things always _ much.A.useB. spendC. takeD. cost5. Linda was busy when I went to see her yesterday evening. She_ for an exam.A. studiesB. is studyingC. was studyingD. has stud
17、ied6. Chinese nucleic acid testing (核酸检测) system can process _samples a day.A. 52 millions ofB. 52 millionC. 52 million ofD.52 millions7. Shui Qingxia, coach of Chinas Women Football Team,_with the 2022 National LaborMedal for her achievement.A. is presentedB. presentsC. presentedD. was presented8.
18、Yancheng High-speed Railway Hub Bus Station has been _ for about one year.A.in troubleB. in useC. in dangerD. in surprise9. Which of the following words is formed like “unimportant”?A. incorrectB. afternoonC. scientistD. hopeful10. -What are you doing, Jack?-I am searching for some information about
19、 the Blue Moon. I wonder_.A. that it will appear next timeB. why does it look blueC. when was it found for the first time D. whether it represents something lucky11. Now most young people like shopping online because they_ spend a lot of time going fromshop to shop.A. needntB. cantC. mustntD. should
20、nt12. -Mrs. Black, should we take an umbrella or a raincoat for the school trip?-_of them. It says it will be sunny tomorrow.A. NoneB. BothC. EitherD. Neither13. “_” means that you have to do something before others in order to be successful.A.Amiss is as good as a mile.B.A friend in need is a frien
21、d indeed.C. The early bird catches the worm.D. When in Rome, do as the Romans do.英语试卷第 2页 共 8页14. Which of the following words can be filled in the blank to makethe poem complete and beautiful?A. viewB. lightC. sightD. snow15. -Mum, dont forget to upload our health codes to my teacher Mr. Chen.-_.A.
22、 Never mindB. No problemC. Hold onD. It doesnt matter二、完形填空(共二、完形填空(共 15 小题小题, 每小题每小题 1 分分, 计计 15 分)分)阅读下面短文,掌握其大意,然后从各题所给的四个选项中选出最佳答案。What will you do when you have great difficulties in achieving your goals? Sometimes you maywant to16. But that is not the case for this17young girl. Meet Vitoria Bu
23、eno Boche, a16-year-old ballet18from Brazil.Vitoria is easy to be noticed among her group of dancers. The19is a little heartbreaking:She was born20arms. However, Vitoria has loved dancing21she was a little girl. It is hernumber one22. She practises dancing every day.Ballet is difficult even for norm
24、al people. Imagine how23it is for people like Vitoria! Todance well, Vitoria has to work a lot harder and spend a lot more24practising than those youngpeople of her age. Her hard work has paid off. Vitoria has received many awards for25danceperformances, including some from the Royal Academy of Danc
25、e(英国皇家舞蹈学院) in26. Thegirl has proved to us that27is possible with hard work.The young star is also a warm ray of sunshine. In all of her performances, Vitoria displays a bright28. It has the ability to warm up even the coldest of hearts.29dancing, Vitoria has learned tolive her life on her own. She
26、can do everything by herself.Vitoria often uses her social media platform to30teenagers with physical differences likeherself. “If you are tired, learn to rest, not to give up.” one of her famous quotes.16. A. grow upB. make upC. give upD. look up17. A. amazingB. interestingC. boringD. smiling18. A.
27、 singerB. dancerC. waiterD. player19. A. questionB. conversationC. decisionD. reason20. A. withB. withoutC. outD. in21. A. whenB. beforeC. untilD. since22. A. dreamB. habitC. choiceD. interest23. A. hardB. easyC. badD. good24. A. moneyB. luckC. helpD. time25. A. herB. ourC. theirD. its26. A. ParisB.
28、 New YorkC. LondonD. Moscow27. A. nothingB. everythingC. anythingD. something28. A. laughB. smileC. cryD. shout29. A. BesidesB. ExceptC. BeforeD. After30. A. encourageB. explainC. expressD. expectFishing in SnowFrom hill to hill no bird in flight,From path to path no man in.Alonely fisherman afloat,
29、Is fishing snow in lonely boat.英语试卷第 3页 共 8页三、阅读理解(共三、阅读理解(共 15 小题,每小题小题,每小题 2 分,计分,计 40 分)分)(一)阅读下列短文,从每题所给的 A、B、C、D 四个选项中选出最佳答案。A31. Who can take part in the support group?A. Kids aged 9-12.B. Teens aged 14-17.C. Teens with their parents.D.Anybody.32. How many times can one take part in the group
30、at most?A. Once.B. Twice.C. Ten times.D. Twelve times.33. Whats probably the purpose of the support group?A. To teach teenagers some living skills.B.To offer people some snacks and drinks.C. To help children get better grades in exams.D. To help teens reduce anxiety and learn to relax.BThe year 2040
31、 sounds like a long way off. By that time, what willtechnologies have looked like, and what changes will they have brought toclassrooms? Here are some examples of what we may see in schools inthe coming years.Holograms(全息图全息图)What does the inside of a planet look like? Most of us learn aboutthis fro
32、m photos in books. But it is hard to imagine and to understand a planet only through the use offlat pictures. Students in the future are likely to have a very different experience. With the help ofholographic technology, they can learn from3-D image that are projected inside of the classroom.英语试卷第 4
33、页 共 8页Virtual reality(虚拟现实虚拟现实)Virtual reality has been used to teach pilots how to fly planes. In 2040, it may provide studentswith immersive scenes(沉浸式场景). For example, when they learn about an ancient queen, they willbe able to “walk” in her castle. They will not only read about history, but also
34、 “experience” it.34. What does the underlined word “they” refer to in the second paragraph?A. Students.B. Pictures.C. BooksD. Photos.35.According to the passage, virtual reality can help students_.A. understand a planetB. experience the castleC. teach them how to fly planesD. provide them with immer
35、sive scenes36. What does the writer think of classrooms in the year 2040?A. Meaningless.B. Difficult to use.C. Useful.D. Expensive to build.CThe Forbidden City is in the heart of Beijing, China. It was builtunder the orders of the Yongle Emperor of the Ming Dynasty between1406 and 1420. More than on
36、e million people worked on the building ofthe palace. The best materials were brought in from all over China,including made “golden” bricks. When the palace was completed, theYongle Emperor moved the capital of the empire to Beijing.The Forbidden City is enormous. It covers an area of 725,000 square
37、 metres. There are 90different palaces with courtyards. The Forbidden City was also worked as a fortress (堡垒) to protectthe emperor and his family. It is surrounded by a 10-metre-high wall and a 52-metre-wide river. Eachcorner of the palace has a tall guard tower where guards used to keep watch for
38、enemies.The main buildings of the Forbidden City were all built in a straight line from north to south. Thesouthern part of the palace is called the outer court. It was here that the emperor held officialceremonies (典礼). To the north is the inner court, where the emperor and his family lived. Each s
39、ide ofthe palace has a gate. The main gate is the south-facing Meridian Gate (午门).The Forbidden City was designed using ancient Chinese symbolism. For example, the roof of thelibrary was black. Black stood for water. The roof was painted this colour in hopes that it would protectthe books from fire.
40、If travellers plan a Forbidden City trip, they must enter the Palace Museum at the South Gate (theMeridian Gate).After touring the museum, they must exit from the North or East Gate.37. The underlined word “enormous” is closest in meaning to “_” in Paragraph 2.A. very oldB. very largeC. very popular
41、D. very beautiful38. The river surrounding the Forbidden City was used to_.A. keep enemies away from the palaceB. carry goods into and out of the palaceC. raise fish that the emperor liked to eatD. prevent visitors from entering the inner court英语试卷第 5页 共 8页39. The author mentioned the colour of the
42、library roof in the Forbidden City mainly to show that_.A. the palaces inner and outer courts look very differentB. the palace was designed using ancient Chinese symbolismC. the palace was built using the best materials from all over ChinaD. the palace was designed and built by people from different
43、 countries40.According to the article, visitors to the Forbidden City must_.A. enter through the North Gate and exit from the East or South GateB. enter through the North Gate and exit from the West or South GateC. enter through the South Gate and exit from the East or North GateD. enter through the
44、 South Gate and exit from the West or North GateDWhen night comes, they stop under a big tree. The Tin Woodman cutssome wood and makes a fire for Dorothy. Dorothy and Toto eat some breadand the Lion goes into the forest to find something for his dinner. TheScarecrow collects some nuts for Dorothys b
45、reakfast. Then all of them liedown and sleep until morning.The next day they set off again very early. They walk a few miles andthen come to a big ditch. Its very wide and very deep. There are a lot of sharp rocks at the bottom of it.“How can we cross the ditch?” Dorothy asks her friends.“We cant fl
46、y over it,” the Scarecrow says. “And we cant jump over it. So we must stay here.”The Lion looks at the ditch and says, “I can jump over it.”“Can you?” the Scarecrow says. “Thats good. You can take us across on your back, one by one.”“Who wants to go first?” the Lion says.“Me!” the Scarecrow says and
47、 he gets on the Lions back. The Lion jumps across the ditch easily.Then he jumps back and takes Dorothy and Toto. Finally he takes the Tin Woodman across the ditch.Later in the afternoon, they come to a wide river.“How can we cross the river?” Dorothy asks.“Easy!” the Scarecrow replies. “The Tin Woo
48、dman can cut down some trees and build a raft. Wecan cross the river on that.”“Thats a good idea,” the Lion says to the Scarecrow, “One would believe you had brains in yourhead, instead of straw!”But it takes time to make a raft, and its very late when the Tin Woodman finishes it. So they find acozy
49、 place under the trees where they sleep well until the morning. That night, Dorothy dreams offlying to the Emerald City and finding the good Wizard Oz, who would soon send her back to Kansas.(Adapted from The Wonderful Wizard of Oz)41. Who eats bread for dinner?A. The Tin WoodmanB. Dorothy and TotoC
50、.The lionD. The Scarecrow英语试卷第 6页 共 8页42. To take his friends across the ditch on his back, the Lion jumpstimes.A. threeB. fourC. fiveD. six43. By the underlined sentence “One.straw”, the Lion wants to.A. stop the Scarecrow from building the raftB. encourage the Scarecrow to think like a manC. prais