单元能力提升九
牛津深圳九年级上册Unit 4 单元测试能力提升(含答案)
九年级上册Unit 4 单元测试能力提升II．完形填空（10分）阅读下面短文，从短文后每小题所给的A、B、C、D四个选项中选出最佳选项。
(共10小题，每小题1分)My name is Lucas Cole. I am seventeen years old. And I am happy that I am finally free.At ___21___, high school was really a great experience for me. I did well in my classes and had many friends. I had an awesome (令人赞叹的) freshman year. But the longer I stayed in high school, ___22___ I felt something was missing in my life.I stayed in the same building for six ___23___ or more every day, I'm not saying that I ___24___ learning; knowledge is important to me. When I finally met a (n) ___25___ that I liked, I would study it for three or five days and then move on. This ___26___ me because I felt there was more to learn ___27___ what the teacher told us.Then I also noticed how ___28___ our classes were - usually about forty kids per class. How could a teacher possibly give a ___29___ lesson with forty to fifty kids in such a small classroom? I couldn't focus on the work I was given because everyone wouldn't just shut up and we had no ___30___ to learn something new! ( ) 21. A. first B. last C. that D. all( ) 22. A. the fewer B. the less C. the more D. the better( ) 23. A. minutes B. hours C. seconds D. times( ) 24. A. liked B. finished C. started D. hated( ) 25. A. lesson B. school C. classmate D. activity( ) 26. A. killed B. bothered C. persuaded D. appreciated( ) 27. A. and B. then C. than D. but( ) 28. A. small B. boring C. crowded D. anxious( ) 29. A. boring B. good C. useful D. careful( ) 30. A. opportunity B. problem C. money D. troubleⅢ. 阅读理解(35分)i.阅读下列短文，从下面每小题的A、B、C、D 四个选项中选择最佳选项。
Unit 1 单元综合能力提升卷-2021-2022学年九年级英语严选金题1+1(人教版)(原卷版)
Unit 1单元综合能力提升卷班级___________ 姓名___________ 学号____________ 分数____________（考试时间：60分钟试卷满分：100分）一、单项选择（共10小题，每小题1分，共计10分）1．Rose finished her study in the university and then went to ________ a good job.A．look up B．look at C．look after D．look for2．You have to be ________ and wait until I finish my work.A．patient B．strict C．honest D．active3．Developing good reading habits can ________ our reading speed.A．review B．receive C．spread D．increase4．—Our Party’s 100th birthday is coming.—Oh, great! We will have many activities to ________ celebrate it.A．wisely B．warmly C．simply D．lovely5．—The summer vacation is coming. Do you have any plans?—I’m going to ________ a hobby like playing the guitar.A．cut up B．look up C．turn up D．take up6．—The songs the little girl sings are very sweet.—She ________ a good voice. Nobody taught her.A．takes care of B．is similar to C．looks forward to D．is born with7．—Would you please ________ what you said?—Sure. I asked you to have a rest. It’s too hot today.A．show B．spell C．review D．repeat8．—Look! Mike does so well in his speech.—Yes, he has a(n) ________ for public speaking.A．eye B．gift C．answer D．attention9．—________ do you study for a test?—________ reading the textbooks.A．How; In B．How; By C．Why; By D．What; In10．Success is the thing that one has to pay the price for it ________ working hard.A．to B．for C．at D．by二、完型填空（共15小题，每小题1分，共计15分）Karl Marx was born in Germany on May 5th, 1818. 11 he was a child, he was forced to leave his country again and again. He lived in Belgium, England and some other 12 .His mother tongue was German and at school he 13 French and English, but he felt his English was poor. So he 14 up his mind to improve his English. He began to work hard 15 it. He made so much progress 16 he could soon read English newspapers and write English articles.However, there were 17 things that he thought were too difficult for him—the grammar and some of the idioms （习语）. He often encouraged himself by saying “18 I keep on trying, I’ll make even greater progress.”At the same time, his close friend, Engels, often wrote to 19 him for his hard work in learning English.In one of Marx’s books, he gave people who were learning a foreign language some 20 on how to learn it well. He said a foreign language was necessary for a person to have a 21 future. He said a person should translate every word he heard into the foreign language he was learning. If he could do this, it would be 22 for him to use the language freely.In Apr il, 1841, he 23 his doctor’s degree. After that, he began to write articles for a newspaper. He wrote about the housing problems of poor people and their hard life. 24 he tried, he did his best.During the 1840s, Marx and Engels wrote a book together. These words of theirs became very 25 : “Working people of all countries, unit (联合)! ”11．A．When B．Before C．After D．While12．A．farmsB．factories C．schools D．countries13．A．has learned B．was learning C．learns D．learned14．A．has made B．makes C．made D．was making15．A．on B．at C．in D．for16．A．that B．what C．when D．how17．A．one B．two C．three D．four18．A．But B．If C．And D．As19．A．praise B．ask C．help D．call20．A．examples B．meanings C．money D．advice21．A．good B．better C．well D．worse22．A．probably B．impossible C．possible D．perhaps23．A．gets B．receives C．has received D．received24．A．Whoever B．Whenever C．Whatever D．However25．A．humorous B．understanding C．similar D．famous三、阅读单选（共20小题，每小题2分，共计40分）AXiao Ling is a middle school student.She likes English very much and she is good at it. Xiao Ling is a middle school student. She often tells her parents about her English study. Now she is talking with her father about her English study again. Xiao Li ng says, “Look, Dad, this is our new English book. There are a lot of interesting stories in it.”“Mmm, not bad. Do you only speak English in class?” Dad asks.“Oh, no! We speak English for most of the time in class! Our teacher speaks to us only in E nglish. Sometimes it’s not easy for us to understand her, but she says listening and speaking can help us a lot,” Xiao Ling answers.“I think she’s right. Does she speak English very slowly?” asks Dad.“Not always. Sometimes we don’t understand her. Then she has to say it again,” answers Xiao Ling.“It’s interesting to study English, isn’t it?” Dad says.“Yes, it is. And I’m going to work harder at it in the new school year. I’m going to do my best,” says Xiao Ling.“That’s good. I’m sure you can do better,” Dad says.26．Xiao Ling does _________ in English.A．well B．good C．bad D．badly27．_________ often talk(s) about her English study with her.A．Her mother B．Her father C．Her parents D．Her teachers28．Do the students only speak English in class ?A．Yes, they do B．No, they don’t. C．That’s OK. D．Of course.29．The teacher _________ speaks to them in English in class.A．often B．usually C．always D．sometimes30．What is Xiao Ling going to do?A．She is going home. B．She is going to school.C．She is going to drop English. D．She is going to do her best and work harder at English.BA good way to pass an examination is to work hard every day in the year. You may fail in an examination if you are lazy for most of the year and then work hard only a few days before the examination. If you are taking an English examination, do not only learn rules of grammar.Try to read stories in English and speak English whenever you can. A few days before the examination you should start going to bed early. Do not stay up late at night studying and learning things. Before you start the examination, carefully read over the question paper. Try to understand the exact meaning of each question before you pick up your pen to write. When you have at last finished your examination, read over your answers. Correct the mistakes if there are any and make sure that you have not left anything out.31．The best way to pass the examination is to ________ every day.A．read B．write C．work hard D．listen to teachers32．You should ________ whenever you can.A．work B．read stories in EnglishC．speak English D．both B and C33．Before you start the examination, you should carefully ________.A．read the whole text B．read over the question paperC．choose the best answer D．think the meaning34．Correct the mistakes when you ________.A．finish your examination B．have read the questionC．are in the middle of your doing D．pick up your pen to write35．Which of the following is RIGHT according to the passage?A．Learning English needn’t speak in English.B．If you are taking an English examination, only learn rules of grammar.C．You must stay up late at night studying and learning things before the examination.D．You should correct the mistakes and make sure that you have not left anything out.CListening is an important part of learning English. Here are some suggestions on listening. We hope they can help you.★Relax yourselfBefore you start to listen to something, you need t o relax. This can help your listening. Don’t get nervous or excited.★Listen carefully to the first sentenceThe first sentence tells you a lot about the whole passage, so listen carefully to it.★Think what you’re listeningWhen you listen, try to do some thinking. For example: What happened? When, where and how? What was the result and what does the speaker want to tell us? In this way, you can understand the passage better.★Listen to important factsIt’s important for you to remember some im portant facts. For example, if the passage is a science report, you should try to remember it’s findings, and how the scientists get the results. This is also helpful to your listening.36．Before you start to listen to something, you need to be ________.A．relaxed B．nervous C．excited D．sad37．Listen carefully to ________ when listening.A．the first sentence B．the second sentenceC．the last sentence D．A, B and C38．When listening, we don’t need to think “________”.A．What happened? B．When did the thing happen?C．What does the speaker want to tell us? D．How old is the speaker?39．Is it important to remember some important facts when listening?A．Yes, it is. B．No, it isn’t. C．Yes, it isn’t. D．No, it is.40．If the passage is about a science report, you should remember ________ when listening. A．their family B．how the scientists get the resultsC．how old they are D．what they likeDIf life can be compared to a meal, I think the mistakes are like salt and the success is a candy. “Hey,” said the boy whose name I couldn’t remember, sitting next to me. “Don’t worry. Take your time.” And so I did. But I still couldn’t pronounce my Chinese name that was given by the teacher. I was so embarrassed on my first day of learning Chinese.I took Chinese classes during my summer vacation. Every morning I walked for 25 minutes to the class while having a Chinese pancake from one of the breakfast carts(推车) on the way. Learning Spanish in school was a cushy job for me, because I could speak French and Italian which helped me with it. However, learning Chinese was difficult at first. As a boy who was born in Americaand grew up in America, I knew nothing about the language and had no experience of learning the language. I chose it mainly because my goal was to teach and work internationally.As the classes went on, I slowly found that I was making connections. My 10 years of playing the piano has allowed me to perform for others. My several years of writing has led me to become a school reporter. I knew that my Chinese classes would allow me to speak Chinese well. As the teachers helped me build up the confidence, I soon began tasting the sweetness.So what did my summer really taste like? It tasted like the Chinese food that, for the first time, I did not order in English, my mother language.41．Why did the writer feel embarrassed in his first Chinese class?A．Because he had no Chinese name. B．Because he forgot his Chinese name.C．Because he had bad Chinese pronunciation. D．Because he couldn’t write his Chinese name. 42．The underlined word “cushy”in Paragraph 3 most probably means “________”. A．common B．easy C．popular D．interesting43．The writer’s first language is ________.A．French B．English C．Italian D．Spanish44．What do we know about the writer according to the passage?A．He is good at playing the piano. B．He doesn’t like Chinese food at all.C．He is interested in writing and painting. D．He wants to be a Chinese teacher in the future. 45．What does this passage mainly talk about?A．An unpleasant day at school. B．How to get on with Chinese teachers.C．How to develop an interest in Chinese. D．A sweet experience of learning Chinese.四、短文汉语提示填空（共10小题，每小题1分，共计10分）根据短文内容和所给中文提示，在空白处写出单词的正确形式。
第九单元 数学广角-推理(B卷 能力提升练)-2022-2023年二年级下册(人教版)
第九单元数学广角－推理（B卷能力提升练）（满分：100分，时间：60分钟）一、选择题（每题2分，共16分）1. 甲、乙、丙三个小朋友分别戴着1顶蓝帽子，1顶红帽子和1顶黄帽子，甲既没有戴蓝帽子，也没有戴黄帽子，则甲戴的是（）。
A. 黄帽子B. 红帽子C. 蓝帽子2. 小明、小东和小红进行跳绳比赛，他们跳了90、110、125下，小明说：“我跳的不是最高”。
小东说：“我刚好跳了90下”。
小红跳了（）下。
A. 125B. 110C. 903. 今天上午有语文、数学、体育三节课。
第一节不是体育课，第二节是语文课，第三节是（）。
A. 数学课B. 语文课C. 体育课4. 聪聪比明明轻，冬冬比明明重，最重的是（）。
A. 聪聪B. 明明C. 冬冬5. 小明、小红、小东三位同学拍球，他们分别拍了30下、29下、28下，小红说：“我不是最多的。
”小东说：“我拍了28下。
”小明拍了（）下。
A. 30B. 29C. 286. 三个小朋友分别出生在上海、杭州、西安三个城市，笑笑不是出生在杭州，也不是出生在上海，她出生的城市是（）。
A. 上海B. 杭州C. 西安7. 有红、黄、蓝三个皮球，小杰、小红、小阳三人各拿一个。
小杰说：“我拿的不是黄皮球。
”小红说：“我拿的是红皮球。
”那么拿蓝皮球的是（）。
A. 小杰B. 小红C. 小阳8. 大课间活动，李老师和乐乐、棒棒、康康、盈盈、晶晶在操场上做游戏，所站的位置如图所示。
李老师的两边是乐乐、棒棒，李老师的正对面是康康，棒棒和晶晶不相邻，乐乐和盈盈不相邻。
那么站在A位置的是（）。
A. 康康B. 盈盈C. 晶晶二、填空题（每题2分，共16分）9. 学校合唱组有20人。
美术组的人数比合唱组少，比书法组的人数多。
这三个兴趣小组中，人数最多的是（）组，人数最少的是（）组。
10. 二年级举行数学竞赛，甲、乙、丙三人取得了前3名，已知甲不是第一名，丙是第三名，那么（）是第一名，（）是第二名。
2022年秋新教材高中历史单元总结提升9中华人民共和国成立和社会主义革命与建设课件部编版必修中外历史
材料二 下图反映的是1952年与1949年相比工农业总产值的增长情 况。
材料三 “一五”计划规定，在(国家)基本建设投资总额427.4亿元 中 ， 农 林 水 利 等 为 32.6 亿 元 ， 占 7.6% ， 工 业 部 门 为 248.5 亿 元 ， 占 58.2%，其中轻工业占工业总额的11.2%，重工业占88.8%；在经济发展 速度上，农业总产值年均增长4.3%，工业平均增长14.7%，其中轻工业 年均增长12.4%，重工业年均增长17.8%。
第九单元 中华人民共和国成立和社会主 义革命与建设
单元总结提升
【体系建构】
【通史整合】
一、中华人民共和国成立初期的外交特点 1．革命性。 (1)其主要原则是在中国革命运动的理论思想指导下产生的，同革命 运动后期的实践及解决的问题有密切联系。 (2)中华人民共和国成立后，确立了独立自主的和平外交方针，提出 了“另起炉灶”“打扫干净屋子再请客”“一边倒”等方针，从产生的 指导思想和解决的主要问题看，这几项方针都表现出一种强烈的革命 性。
2．特点。 (1)民主是一种价值观念，更是一种国家制度。作为社会主义民主政 治，其根本特点是党的领导、人民当家作主和依法治国的有机统一。 (2)从政治制度建设的层面讲，包括：人民代表大会制度，是实现人 民当家作主的根本政治制度；中国共产党领导的多党合作和政治协商制 度、民族区域自治制度，是实现人民当家作主的基本政治制度。 (3)民主政治的建设必须有制度化、法制化的保障。依法治国成为社 会主义民主政治的重要内容。
2. 影响。 (1)中美关系缓和是20世纪70年代中国外交形势转变的关键。 (2)中美关系的缓和，直接推动了中日关系的发展，接着在国际上出 现了同中国建交的第二次高潮，打开了中国外交的新局面。
第九单元 溶液 B卷 能力提升——2021-2022学年人教版九年级下册化学单元测试AB卷
第九单元溶液 B卷能力提升1.《本草纲目》中“黄连”条目下记载：“吐血不止，用黄连一两，捣碎，加豉二十粒，水煎去渣，温服。
”该过程中没有涉及的操作是( )A.加热B.称量C.过滤D.蒸发结晶2.20℃时，NaCl的溶解度为36g。
配制此温度下20g质量分数为5%的NaCl溶液，下列说法正确的是( )A.配制该溶液需要5gNaClB.该溶液为饱和溶液C.将该溶液长时间敞口放置，最终有晶体析出D.配溶液时，量取所需体积的水倒入烧杯，有少量水洒出，则所配溶液浓度小于5%3.同一温度下，从100mL饱和食盐水中取出10mL，下列说法正确的是( )A.溶质的溶解度变小了B.剩余溶液由饱和变成不饱和C.取出溶液中溶质质量分数变小了D.剩余溶液密度不变4.如图所示，向小试管中分别加入下列一定量的物质，右侧U型管中的液面a高于b，该物质是( )A．氢氧化钠固体 B．浓硫酸C．氯化钠晶体D．硝酸铵晶体5.下列说法中，正确的是( )A.在一定温度下，M物质的饱和溶液一定是浓溶液B.有时某一物质的溶液是稀溶液，同时也可能是饱和溶液C.同一温度下，饱和溶液比不饱和溶液浓D.相同质量的同一溶质的饱和溶液一定比它的不饱和溶液所含的溶质多K Cr O中常混有KCl，这两种物质的溶解度曲线如图所示，下列说法正确的6.工业制备的227是( )K Cr O和KCl的溶解度相等且均为46gA.227B.40℃时，饱和KCl溶液中溶质与溶剂质量之比为2:3K Cr O溶液和KCl溶液均不饱和C.60℃时，M点对应的227K Cr O溶液降温至40℃，析出固体20gD.将60℃的146g2277.20℃时，氯化钡的溶解度是35.8g。
该温度下，将15g氯化钡和20g氯化钡分别加入50g 水中，充分溶解后，所得溶液的溶质质量分数分别为( )A.23.1%、26.4%B.23.1%、28.6%C.30%、35.8%D.30%、40%8.向一定量的饱和石灰水中加入少量生石灰，得到如图所示曲线，则y可表示( )①溶质的质量②溶剂的质量③溶液的质量④溶液中溶质的质量分数A.①③B.①④C.②③D.①③④9.溶液在工农业以及医疗上有着广泛应用。
译林版英语九年级上册_Unit_3_能力提升_单元定心卷(原卷版)
Unit 3 能力提升单元测试定心卷（原卷版）班级___________ 姓名___________ 学号____________ 分数____________（考试时间：60分钟试卷满分：100分）第I卷（选择题）一、完型填空(共10分)Growing up is not always easy. When we face difficulties, a spirit of depending on 1 is more useful than crying for help. Th at’s what Hong Zhanhui’s story of growing from boy to man2 family hardship tells us.Hong was born in 1982 in a poor family in Xihua County(县), Henan Province. When he was only 11, his father became badly ill and one day he came back with an unwanted baby 3 A year later, Hong’s mother 4 home. She no longer wanted to live such a poor life and face her sick husband. So everything hard fell onto the young boy’s 5 : to take care of his father and the younger sister Chenchen, and to go on to study.Although his life was hard, Hong didn’t go away from his father and sister. He took several part-time jobs to 6 his family. He climbed tall trees to get birds’ eggs for his sister. He walked 2 hours at weekends to the market to 7 different things to sell around his school. A few years later, he studied at a college. To take care of Chenchen, he worked hard to 8 .After Hong’s story went9 , he became a hero in people’s eyes. But Hong 10 offers from others. He said he felt encouraged by kind offers, but he could depend on his own work.Through his hard life, he has grown up from boy to man.1. (1分)A. parents B. friends C. yourself D. God2. (1分)A. out of B. into C. without D. with3. (1分)A. dog B. cat C. girl D. boy4. (1分)A. left B. arrived C. went D. came5. (1分)A. back B. shoulders C. head D. body6. (1分)A. help B. save C. protect D. feed7. (1分)A. make B. buy C. produce D. collect8. (1分)A. build B. borrow C. rent D. share9. (1分)A. public B. clear C. by D. far10. (1分)A. accepted B. asked C. received D. refused二、阅读单选(共40分)AWhen people talk to each other, write letters or make phone calls, words of the spoken form or the written form can send any message they want to pass on.But besides words, do you know any other ways you can use to communicate with people？Rich expressions on your face can be one of them. A smile on your face shows that you are happy. Tears in your eyes tell others that you are sad or excited. Body languages can do the same job. When you put your hand up in class, the teacher knows that you want to say something or you may have some questions to ask. You shake your head from side to side and people know you are saying"no"or refuse others' requirements. When you nod, people will understand that you are saying"yes"or agree to others' opinions or suggestions.Other forms can also carry different message. For example, a sign at the bus stop gives passengers instructions on which bus to take. The flag language made by soldiers can pass different orders. Sound from the school bell tells the students and the teachers when to begin or end a class. A photographer can use the photos he has taken to tell others about what he thinks of the world around him. Music and films also convey the feelings and ideas of the musicians and the directors.So next time when you see a piece of art or listen to some music, take it as communication with its creator and try to get the meaning behind it.11. (2分)When people want to use the words to communicate with others, they________.A. write lettersB. cry aloudC. keep silentD. make friends12. (2分)According to the passage you just need to________ if you agree to others' suggestions.A. close your eyesB. put up your handC. move your head up and downD. shake your head from side to side13. (2分)Through a photo we may know________A. Which bus can be takenB. What's the orders mean for soldiersC. How the photographer sees the worldD. when the students should have a class14. (2分)The underline world convey probably means__________in the passage.A. 掩饰B. 传递C. 克制D. 爆发15. (2分)The best title for the passage may be________.A. Spoken and Written LanguagesB. Forms of CommunicationC. Facial Expressions and GesturesD. Suggestions on Communication.BAs a teenager, I had a lot of anger (愤怒) and was not good at communicating with my parents.One day, when I was getting ready for school, my mother handed me a T-shirt. It was my father's, not mine. At that time, I was taller and stronger than my father, so when I put the T-shirt on, I felt like I was being choked (窒息) in it! I realized that it was a small mistake by my mother, but the feeling of being choked made me very angry. Without thinking, I took out my anger on my mother. I ripped (撕破) the T-shirt!Later, my mother told my father what had happened, “See what your son has do ne. ” Instead of scolding me, my father asked my mother to repair the T-shirt. He then wore it to work the next day.Later when my mother told me about what my father had done, I felt ashamed of my behaviour. He spent the whole day wearing a ripped T-shirt. At the same time, I was filled with great admiration for my father. His kindness taught me a life lesson I would never forget. On that day, I made a decision that I would never let anger beat me.16. (2分)Why did the writer feel bad in the T-shirt?A. Because it smelt terrible.B. Because he hated the colour.C. Because it was too small for him.D. Because it was made of cheap material.17. (2分)What did the writer do to the T-shirt?A. He ripped it.B. He washed it.C. He threw it away.D. He gave it to his father.18. (2分)What does the underlined word “scolding” in Paragraph 3 mean in Chinese?A. 遗忘B. 责骂C. 提醒D. 同情19. (2分)What did the writer think of his father?A. He was kind.B. He was strict.C. He didn't care about him.D. He was not good at communicating.20. (2分)The passage mainly tells us that we should ______.A. control our angerB. not make mistakesC. care about our parentsD. not spend much money on clothesCOnce when I was a teenager, my father and I were standing in line to buy tickets for the circus. Finally, there was only one family between the ticket office and us. This family made a big impression on me.There were eight children, all probably under the age of 12. You could tell they didn't have a lot of money. Their clothes were not expensive, but they were clean. The children talked excitedly about the clowns. It was clearly a very important day out for them. The father and mother seemed happy as they could be.The ticket lady asked how many tickets the father wanted. He proudly answered, “Please let me buy eight children's tickets and two adults' tickets, so I can take my family to the circus. ”The ticket lady told him the price.The man's wife lowered her head. There was no longer a smile on the man's face. He quietly asked, “How much did you say?”The ticket lady again told him the price.The man obviously didn't have enough money. But how could he tell his kids the bad news?Seeing what was happening, my dad took a $ 20 note from his pocket and dropped it on the ground. （We were not rich ourselves at all!）He then tapped the man on the shoulder and said, “Excuse me, sir, you dropped this”The man understood my father was helping him. He picked up the money, looked straight into my dad's eyes, and in tears replied, "Thank you. This really means a lot to me and my family. "Although we did not go to the circus that night, we didn't feel sorry for it at all.21. (2分)Why does the writer say "Their clothes were not expensive, but they were clean"?A. To show the children were well looked after.B. To show cheap clothes could be popular.C. To show how hard the mother worked. "D. To show how rich the family were.22. (2分)Why was the poor man unhappy after he spoke with the ticket lady?A. He had lost his money.B. His children were noisy.C. The tickets were sold out.D. The tickets were too expensive.23. (2分)Who did the $20 note belong to?A. The poor man.B. The writer's father.C. The poor man's wife.D. The ticket lady.24. (2分)Why was the poor man in tears at the end of the story?A. He found the money he lost.B. He wanted others to help him.C. He made his children unhappy.D. He was thankful for the kindness.25. (2分)Which of the following statements is probably TRUE according to the passage?A. The poor man saw the circus that night.B. The two families became close friends.C. The writer's father earned some money.D. The writer saw the circus that night.DThe Piano LessonJenny wasn't interested in playing the piano. She liked writing stories and acting them out with her friends. But Mrs Windsor gave her piano lessons for free, so she felt she should have a try. Every Sunday she had her piano lessons in Mrs Windsor's house.One Sunday morning, Jenny walked into Mrs Windsor's music room and sat down on the piano bench as usual."Hello," Jenny heard a voice behind her. She turned around and saw a young girl."What's your name?" The girl asked.Before Jenny could answer, Mrs Windsor walked in and said, "Jenny, this is my niece (侄女), Pasha. Pasha, this is Jenny. I need to go to hospital, so Pasha will give you your lesson today. "Pasha sat beside Jenny on the piano bench and asked, "What piece do you like best?""I don't know," Jenny said. "They're all the same to me. ""You mean you don't have a favourite?" Pasha was surprised."No, not really," Jenny said.Pasha opened Jenny's music book and asked Jenny to play.After about a page or two, Pasha gently put her hand on top of Jenny's. Jenny stopped. Then Pasha said, "Jenny, what are you hearing in the music?" Jenny looked at Pasha strangely."I don't know," Jenny said."Let me try and you listen," Pasha said. "All you have to do is learn to hear the stories in the music. ""I' ve never thought of it that way," Jenny said."let's try together, shall we?" Pasha smiled. Together they played that afternoon and tried to find the story in the music. That day Jenny found playing the piano was not that difficult.26. (2分)Why did Jenny go and learn piano lessons?A. Because she liked music very much.B. Because she paid nothing for them.C. Because Mrs Windsor played very well.D. Because Mrs Windsor forced her to do so.27. (2分)Which of the following statements is True?A. Mrs Windsor's niece knew Jenny very well.B. Mrs Windsor was too busy with her work to teach Jenny.C. Mrs Windsor didn't feel well that day.D. Jenny saw a girl in the room when coming in.28. (2分)What did Jenny mean when she said, "No, not really"?A. She didn't agree with Pasha.B. She hated music very' much.C. She liked one piece of music.D. She had no favourite piece of music.29. (2分)The underlined word "gently" means ____________ .A. hardlyB. heavilyC. kindlyD. happily30. (2分)How can you play music well according to the passage?A. Practice a lot.B. Understand it.C. Have a good teacher.D. Play with a girl.第II卷（非选择题）三、阅读下面短文, 根据短文内容回答问题(共10分)Is it difficult for you to remember things? I`d like to tell you some ways to improve your memory, so you shouldn`t feel upset.My first advice is that if you want to remember something well, you have to review it regularly(有规律地). You might review the material two days after you learn it, then a week later, then two weeks later, and then a month later. After a month you will find that you can easily remember the material.My second advice is to use a colored pen to highlight （标注）the important parts on your book. This will help you in two days. First, it will help you pay attention to the most important parts when you learn the language. It is always easier to remember only the key points. Second, this will make reviewing easier. When you open your book, the colored parts will show you the most important things quickly. In this way, you don`t have to review all the material again.Another piece of advice is to use the proper time well. First, review all the information in your mind right before you go to sleep. Your brain is working while you are sleeping. If you think about the information before you go to sleep, you might be able to remember it better. Another good time for memorizing information is in the morning because you have just rested and your brain is fresh and clear. So you might also try to review the important information in the morning.31. (2分)How long may it take you to remember the material easily if you review it regularly?32. (2分)Is it easier to use a colored pen to help remember the key points?33. (2分)What is the good time to review information?34. (2分)How many pieces of advice does the writer give?35. (2分)What is the passage mainly about?四、用单词的正确形式完成句子(共5分)deal with stay up be worth be strict with have no choice but36. (1分)I think this picture ________________at least twenty pounds.37. (1分)The patient was so ill that the nurse had to ________________to look after her allnight.38. (1分)I can't ________________ this problem. Can you give me a hand？39. (1分)The teacher ________________ me when I was at school, so I studied very well.40. (1分)There was something wrong with my car, so I ________________to go home by bus.五、单词填空(共10分)Many teenagers don't get along well with their parents and they don't know what to do. If you fare such a problem, what I'm saying now might be h41. (1分) to you.Have you ever thought of t42. (1分) to your parents to find out why you don’t get along well with each other？When I was a teenager, I didn't get on well with my parents, e43. (1分). We sometimes argued（争吵）with each other. I am sorry that I had such an e44. (1分). Now I'm a mother of four girls. Of course we have different opinions, but I encourage them to communicate with meopenly and honestly. In this way I make sure that they t45. (1分) me and come to me for anything. As a r46. (1分), we get along very well.Arguing with your parents will make them angry and you won't feel good.Also, remember that the most important thing is to solve problems. Try your best to be calm. If you cannot control your f47. (1分), you can go to a doctor or your teacher who could give you a48. (1分) on your problem.Remember that your parents love you. Sometimes they do something that you find h49. (1分) to understand. For example, you may want to be a singer in the future, but your parents want you to do something else. If s50. (1分), try to think in their shoes.Life is too short and family is important！Try your best to get along well with your parents.六、填写适当的句子补全对话(共10分)A: Summer holiday is coming. ____?B: Yes, I’m going to my hometown.A:____?B: For about a month. ____?A: I want to travel to Hainan Island. It’s a beautiful place of interest.B:____But I have to visit my grandparents in my hometown.A: It doesn’t matter. If you stay in your hometown for fewer days, you’ll have enough tim e togo traveling.B:____Then I will go to my hometown as soon as the holiday begins.A: OK! I will wait for you until you come back.B: That’s a deal! Thank you.51. (2分)52. (2分)53. (2分)54. (2分)55. (2分)七、材料作文(共15分)56. 书面表达近20年来, 各方面调查表明青少年体质的下降令人担忧。
)人教版九年级Unit 5 单元能力提升试题(含答案)
人教版九年级Unit 5单元能力提升试卷一、语法选择。
(本大题有10小题，每小题1分，共10分)阅读下面短文，按照句子结构的语法性和上下文连贯的要求，从A、B、C和D项中选出最佳选项。
Man has invented four kinds of satellites.The first kind of satellite __1__ the geography of the earth.They are used to make maps.They also help countries to see where they __2__ find oil or gold.The second kind of satellite is used to guide __3__ and planes.A ship or a plane can send a message to the satellite，and the satellite can find out where the ship or __4__．The third kind studies the weather.These satellites watch clouds and strong winds __5__ across the earth.They warn countries to make preparations __6__ very bad weather is coming.The last kind is used for communication.Telephone calls __7__ countries can be sent by these satellites.Some can carry hundreds of calls at __8__ same time.The call __9__ to the satellite，then the satellite sends it to a station in the country and this country is being phoned.These satellites also carry pictures.They can receive and send about eight programs __10__ a time.( )1.A.study B．will study C．was studying D．studies( )2.A.must B．may C．need D．should( )3.A.ship B．ships C．train D．trains( )4.A.the plane is B．is the plane C．the plane was D．was the plane( )5.A.moved B．moving C．to move D．to moving( )6.A.although B．until C．after D．when( )7.A.during B．along C．between D．of( )8.A.the B．an C．a D．/( )9.A.was sent B．will send C．sends D．is sent( )10.A.for B．at C．with D．in二、完形填空。
人教版九年级英语上册作业课件Unit 2 单元同步阅读能力提升
On the New Year's Eve，I enjoyed a big meal with my friend's family.We watched a special show on TV.As I __4__ understand Chinese well，the time seemed to pass very slowly.When midnight came，everyone in the house shouted in __5__． Every morning in the following days I __6__ to the sounds of firecrackers (鞭炮) as early as 5 a．m.My friend told me that people were chasing off evil spirits.He took me to visit __7__ relatives during the day.We were usually invited to stay for dinner.We once happened to see a lion dance on the street.Every business owner was happy if the “lions” stopped by their shop，__8__ that usually means good luck will come.
( C)13.The sky lanterns first were used for ________ by Zhuge Kongming in ancient times. A．making wishes B．celebrating birthdays C．asking for help D．making friends
第九单元 浮力单元测试(B卷能力提升练)(原卷版)
班级姓名学号分数第九单元浮力（B卷·能力提升练）一．选择题（共9小题）1．中国桥梁建设水平居于世界领先地位，下列和桥有关的表述中不正确的是（）A．行人对桥的压力是由鞋的形变产生的B．浸在水中的桥墩受到水的浮力作用C．行驶在大桥上的汽车以桥为参照物是运动的D．行驶到桥上最高点的汽车，如果所有力消失，车将做匀速直线运动2．两个完全相同的圆柱形容器放在水平桌面上，分别装有甲、乙两种不同的液体。
将体积相同、密度不同的实心小球A、B分别放入容器中静止，A球沉底，B球漂浮，如图所示，h1＜h2，且两种液体对容器底的压强相等，则（）A．两个小球的重力：G A＜G BB．两个小球的浮力：F浮A＞F浮BC．两种液体的密度：ρ甲＜ρ乙D．两个容器对桌面的压强：p甲＝p乙3．2022年1月，海啸导致南太平洋岛国汤加淡水紧缺，为实施人道主义救援，中国海军五指山舰日夜兼程抵达汤加之后，停泊于码头旁并通过管道向陆地输送550t淡水，如图所示，输水过程中，五指山舰（）A．舰体略上浮，受到浮力不变B．舰体略上浮，受到浮力变小C．舰体略下沉，受到浮力不变D．舰体略下沉，受到浮力变大4．2021年12月9日，航天员王亚平在“天宫课堂”中展示了“浮力消失实验”。
在中国空间站微重力环境中，她用吸管把乒乓球轻轻压入水中，取出吸管后，观察到乒乓球悬停在水中，如图甲所示；在中国科技馆的同学们做了同样的实验，用吸管把完全相同的乒乓球压入水中，取出吸管后，乒乓球会迅速上浮直至漂浮在水面，如图乙所示。
请根据你所学的物理知识，判断下列说法中正确的是（）A．图甲中的乒乓球具有惯性，图乙中的乒乓球不具有惯性B．图甲中的乒乓球受到水对它向上与向下的压力差几乎为零C．图乙中的乒乓球在上浮过程中，受到水的浮力等于它受到的重力D．图乙中的乒乓球在水面漂浮时，往水中加盐，乒乓球会下沉5．如图所示，将一个空心铁球浸没入水中，放手后铁球恰好悬浮，若沿虚线方向将铁球切成大小不等的两块，则（）A．大块的将下沉，小块的将上浮B．大块的将上浮，小块的将下沉C．两块都将上浮D．两块都将下沉6．刘星取一只空牙膏皮，一次将它挤瘪，一次将它撑开，两次都拧紧盖后，先后放入桌面上同一杯水中，结果如图甲、乙所示。
人教版九年级上册数学 第二十一章 一元二次方程 单元提升练习(含答案)
一元二次方程单元提升练习一．选择题1．用“配方法”解一元二次方程x2﹣16x+24＝0，下列变形结果，正确的是（）A．（x﹣4）2＝8 B．（x﹣4）2＝40 C．（x﹣8）2＝8 D．（x﹣8）2＝40 2．若m是方程x2﹣x﹣1＝0的一个根，则m2﹣m+2020的值为（）A．2019 B．2020 C．2021 D．20223．已知x＝﹣2是方程x2+bx﹣2＝0的一个根，则b的值为（）A．1 B．﹣1 C．2 D．﹣24．若α、β是一元二次方程x2+2x﹣6＝0的两根，则的值是（）A．B．C．﹣3 D．35．若关于x的一元二次方程（a﹣6）x2﹣2x+3＝0有实数根，则整数a的最大值是（）A．4 B．5 C．6 D．76．某水果园2017年水果产量为50吨，2019年水果产量为70吨，求该果园水果产量的年平均增长率．设该果园水果产量的年平均增长率为x，则根据题意可列方程为（）A．50（1﹣x）2＝70 B．50（1+x）2＝70C．70（1﹣x）2＝50 D．70（1+x）2＝507．关于x的方程x2﹣3x+m＝0有两个不相等的实数根，则实数m的取值范围为（）A．m＞B．m＜﹣C．m＝D．m＜8．若关于x的方程x2+（m+1）x+m2＝0的两个实数根互为倒数，则m的值是（）A．﹣1 B．1或﹣1 C．1 D．29．我校图书馆三月份借出图书70本，计划四、五月份共借出图书220本，设四、五月份借出的图书每月平均增长率为x，则根据题意列出的方程是（）A．70（1+x）2＝220B．70（1+x）+70（1+x）2＝220C．70（1﹣x）2＝220D．70+70（1+x）+70（1+x）2＝22010．一块矩形菜地的面积是120m 2，如果它的长减少2m ，菜地就变成正方形，则原菜地的长是（ ）A ．10B ．12C ．13D ．14二．填空题11．已知x ＝1是方程x 2+bx ﹣2＝0的一个根，则方程的另一个根是 ．12．对于实数u ，v ，定义一种运算“*”为：u *v ＝uv +v ．若关于x 的方程有两个相等的实数根，则满足条件的实数a 的值是 ．13．一元二次方程x （x ﹣3）＝3﹣x 的根是 ．14．某种品牌的手机经过四、五月份连续两次降价，每部售价由1000元降到了810元．则平均每月降价的百分率为 ．15．一个正方体物体沿斜坡向下滑动，其截面如图所示．正方形DEFH 的边长为2米，坡角∠A ＝30°，∠B ＝90°，BC ＝6米．当正方形DEFH 运动到什么位置，即当AE ＝ 米时，有DC 2＝AE 2+BC 2．三．解答题16．解下列方程：（1）（2x ﹣1）2＝（3﹣x ）2（2）x 2﹣4x ﹣7＝017．已知关于x 的一元二次方程x 2+6x +（2m +1）＝0有实数根．（1）求m 的取值范围；（2）如果方程的两个实数根为x 1，x 2，且2x 1x 2﹣x 1﹣x 2≥8，求m 的取值范围．18．石马河某生鲜店中销售“荣昌土猪肉”，“城口山地鸡”，其中“荣昌土猪肉”标价每千克40元，“城口山地鸡”标价每千克60元（1）该生鲜店售出“荣昌土猪肉”，“域口山地鸡“两种肉品共600千克，若销售总额不低于30000元，则至少销售“城口山地鸡”多少千克？（2）2019年7月，该生鲜店按标价售出“荣昌土猪肉”300千克．“城口山地鸡”400千克．2019年8月，生鲜店根据市场情况，适当调整“荣昌土猪肉”，“城口山地鸡”的售价，“荣昌土猪肉”的售价比7月的标价增加了a%，销量与7月份保持不变，“城口山地鸡”的售价比7月的标价减少了a%，销量比7月份增加了a%，结果8月份“荣昌土猪肉”，“域口山地鸡”的销售总额比7月份增加了a%，求a的值．19．如图，有一块宽为16m的矩形荒地，某公园计划将其分为A、B、C三部分，分别种植不同的植物．若已知A、B地块为正方形，C地块的面积比B地块的面积少40m2，试求该矩形荒地的长．20．手卷是国画装裱中横幅的一种体式，以能握在手中顺序展开阅览得名，它主要由“引首”、“画心”、“拖尾”三部分组成（这三部分都是矩形形状），分隔这三部分的其余部分统称为“隔水”．下图中手卷长1000cm，宽40cm，引首和拖尾完全相同，其宽度都为100cm．若隔水的宽度为xcm，画心的面积为15200cm2，求x的值．参考答案一．选择题1．解：x2﹣16x+24＝0x2﹣16x+64＝﹣24+64（x﹣8）2＝40故选：D．2．解：∵m是方程x2﹣x﹣1＝0的一个根，∴m2﹣m﹣1＝0，∴m2﹣m＝1，∴m2﹣m+2020＝1+2020＝2021．故选：C．3．解：把x＝﹣2是方程x2+bx﹣2＝0得4﹣2b﹣2＝0，解得b＝1．故选：A．4．解：∵α、β是一元二次方程x2+2x﹣6＝0的两根，∴α+β＝﹣2，αβ＝﹣6，则＝＝＝，故选：B．5．解：根据题意得a﹣6≠0且△＝（﹣2）2﹣4•（a﹣6）•3≥0，解得a≤且a≠6，所以整数a的最大值为5．故选：B．6．解：2018年的产量为50（1+x），2019年的产量为50（1+x）（1+x）＝50（1+x）2，即所列的方程为50（1+x）2＝70．故选：B．7．解：∵方程有两个不相等的实数根，a＝1，b＝﹣3，c＝m，∴△＝b2﹣4ac＝（﹣3）2﹣4×1×m＞0，解得m＜．故选：D．8．解：由题意可知：△＝（m+1）2﹣4m2＝﹣3m2+2m+1，由题意可知：m2＝1，∴m＝±1，当m＝1时，△＝﹣3+2+1＝0，当m＝﹣1时，△＝﹣3﹣2+1＝﹣4＜0，不满足题意，故选：C．9．解：四月份共借出图书量为70×（1+x），五月份共借出图书量为70×（1+x）（1+x），那么70（1+x）+70（1+x）2＝220．故选：B．10．解：∵长减少2m，菜地就变成正方形，∴设原菜地的长为x米，则宽为（x﹣2）米，根据题意得：x（x﹣2）＝120，解得：x＝12或x＝﹣10（舍去），故选：B．二．填空题（共5小题）11．解：∵x＝1是方程x2+bx﹣2＝0的一个根，∴x1x2＝＝﹣2，∴1×x2＝﹣2，则方程的另一个根是：﹣2，故答案为﹣2．12．解：由x*（a*x）＝﹣，得（a+1）x2+（a+1）x+＝0，依题意有a+1≠0，△＝（a+1）2﹣（a+1）＝0，解得，a＝0，或a＝﹣1（舍去）．故答案为：a ＝0．13．解：x （x ﹣3）+x ﹣3＝0，（x ﹣3）（x +1）＝0，x ﹣3＝0或x +1＝0．所以x 1＝3，x 2＝﹣1．故答案为x 1＝3，x 2＝﹣1．14．解：设平均每月降价的百分率为x ，依题意得：1000（1﹣x ）2＝810，化简得：（1﹣x ）2＝0.81，解得x 1＝0.1，x 2＝1.9（舍）．所以平均每月降价的百分率为10%．故答案为10%．15．解：如图，连接CD ，设AE ＝x 米，∵坡角∠A ＝30°，∠B ＝90°，BC ＝6米，∴AC ＝12米，∴EC ＝（12﹣x ）米，∵正方形DEFH 的边长为2米，即DE ＝2米，∴DC 2＝DE 2+EC 2＝4+（12﹣x ）2，AE 2+BC 2＝x 2+36，∵DC 2＝AE 2+BC 2，∴4+（12﹣x ）2＝x 2+36，解得：x ＝米． 故答案为：．三．解答题（共5小题）16．解：（1）（2x﹣1）2＝（3﹣x）2（2x﹣1）2﹣（3﹣x）2＝0，[（2x﹣1）+（3﹣x）][（2x﹣1）﹣（3﹣x）]＝0，∴x+2＝0或3x﹣4＝0，∴x1＝﹣2，x2＝；（2）x2﹣4x﹣7＝0，x2﹣4x＝7，x2﹣4x+4＝7+4，即（x﹣2）2＝11，∴x﹣2＝，∴x1＝2+，x2＝2﹣．17．解：（1）∵方程有实数根，∴△＝36﹣4（2m+1）＝36﹣8m﹣4＝32﹣8m≥0，解得：m≤4．故m的取值范围是m≤4；（2）∵x1，x2是方程x2+6x+（2m+1）＝0的两个实数根，∴x1+x2＝﹣6，x1•x2＝2m+1，∵2x1x2﹣x1﹣x2≥8，∴2（2m+1）+6≥8，解得m≥0，由（1）可得m≤4，∴m的取值范围是0≤m≤4．18．解：（1）设销售“城口山地鸡”x千克，则销售“荣昌土猪肉”（600﹣x）千克，依题意，得：40（600﹣x）+60x≥30000，解得：x≥300．答：至少销售“城口山地鸡”300千克．（2）依题意，得：40（1+a%）×300+60（1﹣a%）×400（1+a%）＝（40×300+60×400）（1+a%），整理，得：2.4a2﹣60a＝0，解得：a1＝0，a2＝25．答：a 的值为25．19．解：设B 地块的边长为xm ，根据题意得：x 2﹣x （16﹣x ）＝40，解得：x 1＝10，x 2＝﹣2（不符题意，舍去），∴10+16＝26m ，答：矩形荒地的长为26m ．20．解：根据题意，得（1000﹣4x ﹣200）（40﹣2x ）＝15200． 解这个方程，得：x 1＝210（不合题意，舍去），x 2＝10． 所以x 的值为10．。
人教版英语九年级全一册Unit7(B卷-能力提升)【单元测试】一册分层训练AB卷(人教版)含答案
班级姓名学号分数Unit 1 How can we become good learners？单元测试（B卷·能力提升）（时间：60分钟，满分：100分）一、单项选择（本题共10小题，每小题1分，共10分。
）1．（2022·贵州黔西·中考真题）—Would you please come to help me with my English tonight?—________. I’ll be there at seven. See you!A．Never mind B．Have a good time C．Not exactly D．With pleasure2．（2022·湖北武汉·中考真题）During the Tang dynasty (唐朝), nearly everything produced in the world________ on the streets of Chang’an.A．is found B．has been found C．will be found D．could be found3．（2021·辽宁沈阳·中考真题）—To enjoy your holiday, you’d better find some ideas for a short trip in a travel guide.—________A．That’s a good idea B．You’re welcomeC．It doesn’t matter D．Don’t worry4．（2022·云南普洱·模拟预测）The air was polluted by the factories that burn coal with a lot of black smoke.A．quickly B．impolitely C．badly D．hardly5．（2022·吉林省第二实验学校模拟预测）According to the city rules, our green health codes (健康码) must_______ when we go to public places.A．show B．are shown C．were shown D．be shown6．（2022·内蒙古包头·模拟预测）—The live stream by Liu Genghong on the Internet is really excellent!—_______. I can’t think too highly of it.A．Not exactly B．Don’t mention itC．That’s not the case D．I can’t agree more7．（2022·湖北武汉·一模）During the Tang Dynasty, nearly everything produced in the world ________ on the streets of Chang’an.A．is found B．had been foundC．could be found D．would be found8．（2022·湖北武汉·一模）—Please show me your health code. Both WeChat and Alipay are OK.—________. Here it is.A．No problem B．Be carefulC．Go on D．It’s all right.9．（2022·吉林省第二实验学校模拟预测）Don’t put off today’s work till tomorrow. I mean, today’s work must ________ today.A．be doing B．be done C．do D．done10．（2022·甘肃庆阳·二模）—Can you help me think of an idea to fix up the new machine?—_________. Let me think.A．With pleasure B．No way C．Never mind D．That’s right二、完形填空（本题共10小题，每小题1分，共10分。
人教版英语九年级全一册Unit9(B卷-能力提升)【单元测试】一册分层训练AB卷(人教版)含答案
班级姓名学号分数Unit 9 I like music that I can dance to.单元测试（B卷·能力提升）（时间：60分钟，满分：100分）一、单项选择（本题共10小题，每小题1分，共10分。
）1．（2022·湖南邵阳·中考真题）—What kind of music do you like, Linda?—I like music ________ I can dance to.A．when B．that C．what2．（2022·辽宁营口·中考真题）He ________ does not reach the Great Wall is not a true man.A．whom B．/C．which D．who3．（2022·湖北恩施·中考真题）China is the first nation ________ sent Chang’e Ⅳto the far side of the moon. A．which B．that C．who4．（2022·黑龙江绥化·中考真题）I can’t forget the teachers and the university ________ I visited two years ago. They bring me many sweet memories.A．that B．which C．what5．（2022·贵州铜仁·中考真题）—Is the woman ______ walked past just now your teacher?—Yes, she teaches ______ English and we all love her very much.A．which; our B．who; us C．which; us D．that; our6．（2022·天津·中考真题）Most parents think it is a good ________ to take a school bus because it’s quite safe. A．risk B．choice C．game D．pity7．（2022·江苏扬州·中考真题）People in cold areas ________ warm colours to calm colours in their homes. A．protect B．prefer C．pronounce D．practise8．—What about dancing?—Oh, the music is too quick, I can’t dance ________ it.A．to B．with C．on D．in9．Some of my classmates ________ cartoons ________ documentaries.A．prefer; to B．would rather; than C．like; better D．like; less10．（2020·天津一中九年级单元测试）The arrow (箭) ________ her in the chest ten years ago.A．injure B．wounded C．hurts D．wound二、完形填空（本题共10小题，每小题1分，共10分。
第1章特殊平行四边形单元能力提升训练2021-2022学年九年级数学北师大版上册(word版 答案)
2021-2022学年北师大版九年级数学上册《第1章特殊平行四边形》单元能力提升训练（附答案）1．下列说法中，正确的是（）A．两邻边相等的四边形是菱形B．一条对角线平分一组内角的平行四边形是菱形C．对角线垂直且一组邻边相等的四边形是菱形D．对角线垂直的四边形是菱形2．在菱形ABCD中AB＝5，AC＝8，BC边上的高为（）A．1.2B．2.4C．3.6D．4.83．如图，菱形ABCD的边长为2，∠ABC＝45°，则点D的坐标为（）A．（2+）B．（2，2）C．（，2+）D．（4﹣，2）4．如图，矩形ABCD的两条对角线相交于点O，∠AOB＝60°，AC＝8，则AB的长是（）A．4B．5C．6D．85．如图，要使▱ABCD为矩形，则可以添加的条件是（）A．AC⊥BD B．AC＝BD C．∠AOB＝60°D．AB＝BC6．如图，在正方形ABCD中，BD与AC相交于点O．嘉嘉作DP∥OC，CP∥OD，在正方形ABCD外，DP，CP交于点P；淇淇作DP＝OC，CP＝OD，在正方形ABCD外，DP，CP交于点P，两人的作法中，能使四边形OCPD是正方形的是（）A．只有嘉嘉B．只有淇淇C．嘉嘉和淇淇D．以上均不正确7．如图，在矩形ABCD中，AD＝6．对角线AC与BD相交于点O，AE⊥BD，垂足为E，DE＝3BE，则AE的长为（）A．2B．3C．D．38．如图，在菱形ABCD中，对角线AC，BD交于点O，过点A作AE⊥BC，垂足为E，若AC＝，AE＝2，则菱形ABCD的面积为（）A．5B．10C．D．29．如图，已知点E在正方形ABCD的边AB上，以BE为边向正方形ABCD外部作正方形BEFG，连接DF，M、N分别是DC、DF的中点，连接MN．若AB＝17，BE＝7，则MN ＝（）A．25B．C．12D．10．如图，正方形ABCD中，点E，F分别在CD，BC上，且AF⊥BE，垂足为G，则下列结论：①BE＝AF；②∠AFB+∠BEC＝90°；③∠DAF＝∠ABE；④BF＝CE．其中正确的个数是（）A．1个B．2个C．3个D．4个11．如图，矩形ABCD中，对角线AC，BD相交于点O，AD＝2，∠COB＝60°，BF⊥AC，交AC于点M，交CD于点F，延长FO交AB于点E，则下列结论：①FO＝FC；②四边形EBFD是菱形；③△OBE≌△CBF；④MB＝3．其中结论正确的序号是（）A．②③④B．①②③C．①④D．①②③④12．如图，在Rt△ABC中，∠ACB＝90°，AC＝5，BC＝12，D是AB上一动点，过点D 作DE⊥AC于点E，DF⊥BC于点F，连接EF，则线段EF的最小值是．13．如图，四边形ABCD是边长为4的正方形，点E在边CD上，DE＝1；作EF∥BC，分别交AC、AB于点G、F，M、N分别是AG、BE的中点，则MN的长是．14．如图，在四边形ABCD中，BD为对角线，AD∥BC，BC＝AD，∠ABD＝90°，E为AD的中点，连接BE．（1）求证：四边形BCDE为菱形；（2）连接AC，若AC平分∠BAD，BC＝1，求菱形BCDE的面积．15．已知：如图．矩形ABCD中，O是AC与BD的交点，过O点的直线EF与AB、CD的延长线分别相交于点E、F．（1）求证：△BOE≌DOF；（2）当EF与AC满足什么关系时，以A、E、C、F为顶点的四边形是菱形？并给出证明．16．已知：平行四边形ABCD，对角线AC，BD相交于点O．E是AD的中点，连接OE并延长至F使得OE＝EF，连接FD，FC，FC交BD于点G．求证：（1）△FGD≌△CGO；（2）当AB与AC有怎样的数量关系时，四边形FOCD是菱形，并说明理由．17．如图，已知点E是▱ABCD中BC边的中点，连接AE并延长交DC的延长线于点F，连接AC，BF，AF＝BC．（1）求证：四边形ABFC为矩形；（2）若△AFD是等边三角形，且边长为6，求四边形ABFC的面积．18．如图，在▱ABCD中，对角线AC、BD相交于点O，AC⊥BD，过点A作AE⊥BC，交CB延长线于点E，过点C作CF⊥AD，交AD延长线于点F．（1）求证：四边形AECF是矩形；（2）连接OE，若AE＝4，AD＝5，求OE的长．19．如图，AC为矩形ABCD的对角线，BE⊥AC于点E，DF⊥AC于点F．（1）求证：△ABE≌△CDF．（2）求证：四边形BFDE是平行四边形．20．已知：如图，在菱形ABCD中，点E，O，F分别为AB，AC，AD的中点，连接CE，CF，OE，OF．（1）求证：△BCE≌△DCF；（2）当AB与BC满足什么关系时，四边形AEOF是正方形？请说明理由．21．已知：如图，在菱形ABCD中，F为边BC的中点，DF与对角线AC交于点M，过M 作ME⊥CD于点E，∠1＝∠2．（1）若CE＝1，求BC的长；（2）求证：AM＝DF+ME．参考答案1．解：A、∵两邻边相等的平行四边形是菱形，∴选项A不符合题意；B、∵一条对角线平分一组内角的平行四边形是菱形，∴选项B符合题意；C、∵对角线互相平分且一组邻边相等的四边形是菱形，∴选项C不符合题意；D、∵对角线垂直的平行四边形是菱形，∴选项D不符合题意；故选：B．2．解：设AC与BD交于点O，作出BC边的高h，∵四边形ABCD是菱形，∴AO⊥BO，且AC＝2AO，BD＝2BO．在Rt△AOB中利用勾股定理可得BO＝＝4．∴BD＝2BO＝8．∴菱形的面积为BD×AC＝×6×8＝24．设BC变上的高为h，则BC×h＝24，即5h＝24，h＝4.8．故选：D．3．解：过点D作DE⊥x轴，垂足为E．在Rt△CDE中，CD＝2，∴CE＝DE＝，∴OE＝OC+CE＝2+，∴点D坐标为（2+，）．故选：A．4．解：∵四边形ABCD是矩形，∴AO＝AC＝×8＝4，AC＝BD，OB＝BD，∴AO＝OB，∵∠AOB＝60°，∴△AOB是等边三角形，∴AB＝AO＝4，故选：A．5．解：因为有一个角是直角的平行四边形是矩形；对角线相等的平行四边形是矩形，故选：B．6．解：∵四边形ABCD是正方形，∴OD＝OC，OD⊥OC，∵DP∥OC，CP∥OD，∴四边形DOCP是平行四边形，∴DP＝OC，CP＝OD，∴DP＝OC＝CP＝OD，∴平行四边形DOCP是正方形，故嘉嘉正确；∵四边形ABCD是正方形，∴OD＝OC，OD⊥OC，∵DP＝OC，CP＝OD，∴DP＝OC＝CP＝OD，∴四边形DOCP是正方形，故淇淇正确；故选：C．7．解：∵DE＝3BE，∴BD＝4BE，∵四边形ABCD是矩形，∴BO＝DO＝BD＝2BE，∴BE＝EO，又∵AE⊥BO，∴AB＝AO，∴AB＝AO＝BO，∴△ABO是等边三角形，∴∠ABO＝60°，∴∠ADB＝30°，又∵AE⊥BD，∴AE＝AD＝3，故选：D．8．解：∵四边形ABCD是菱形，∴AC⊥BD，OA＝OC＝AC＝，∵AE⊥BC，∴△ABC的面积＝BC×AE＝AC×OB，∴，设BC＝x，则OB＝2x，在Rt△OBC中，由勾股定理得：（x）2﹣（2x）2＝（）2，解得：x＝，∴BC＝，∴菱形ABCD的面积＝BC×AE＝×2＝5；故选：A．9．解：连接CF，∵正方形ABCD和正方形BEFG中，AB＝17，BE＝7，∴GF＝GB＝7，BC＝17，∴GC＝GB+BC＝7+17＝24，∴CF＝＝25，∵M，N分别是DC，DF的中点，∴MN＝CF＝，故选：D．10．解：∵四边形ABCD是正方形，∴∠ABF＝∠C＝90°，AB＝BC，∵BF＝CE，∴△ABF≌△BCE（SAS），∴AF＝BE（①正确），∠BAF＝∠CBE，∠AFB＝∠BEC（②错误），∵∠BAF+∠DAF＝90°，∠ABE+∠EBC＝90°，∴∠DAF＝∠ABE（③正确），∵△ABF≌△BCE，∴BF＝CE（④正确），故选：C．11．解：∵四边形ABCD是矩形，∴AC＝BD，∴OA＝OC＝OD＝OB，∵∠COB＝60°，∴△OBC是等边三角形，∴OB＝BC＝OC，∠OBC＝60°，∵BF⊥AC，∴OM＝MC，∴FM是OC的垂直平分线，∴FO＝FC，故①正确；∵OB＝CB，FO＝FC，FB＝FB，∴△OBF≌△CBF（SSS），∴∠FOB＝∠FCB＝90°，∵∠OBC＝60°，∴∠ABO＝30°，∴∠OBM＝∠CBM＝30°，∴∠ABO＝∠OBF，∵AB∥CD，∴∠OCF＝∠OAE，∵OA＝OC，∠AOE＝∠FOC，∴△AOE≌△COF（ASA），∴OE＝OF，∵OB⊥EF，∴四边形EBFD是菱形，故②正确；∵△OBE≌△OBF≌△CBF，∴③正确；∵BC＝AD＝2，FM⊥OC，∠CBM＝30°，∴BM＝3，故④正确；故选：D．12．解：如图，连接CD．∵∠ACB＝90°，AC＝5，BC＝12，∴AB＝＝＝13，∵DE⊥AC，DF⊥BC，∠C＝90°，∴四边形CFDE是矩形，∴EF＝CD，由垂线段最短可得CD⊥AB时，线段EF的值最小，此时，S△ABC＝BC•AC＝AB•CD，即×12×5＝×13•CD，解得：CD＝，∴EF＝．故答案为：．13．解：连接FM，FC，∵四边形ABCD是正方形，EF∥BC，∴∠BAC＝45°，四边形BCEF为矩形，∴△AFG为等腰直角三角形，BE＝CF，∵M是AG的中点，∴AM＝MG，则FM⊥AG，即△FMC是直角三角形，∵N是FC的中点，∴MN＝FC，∵DE＝1，BC＝DC＝4，∴CE＝3，∴BE＝FC＝，∴MN＝FC＝2.5．故答案为2.5．14．（1）证明：∵E为AD的中点，∴DE＝AE＝AD，∵BC＝AD，∴DE＝BC，∵AD∥BC，∴四边形BCDE是平行四边形，又∵∠ABD＝90°，E为AD的中点，∴BE＝AD＝DE，∴平行四边形BCDE是菱形．（2）解：如图，∵AD∥BC，AC平分∠BAD，∴∠DAC＝∠BCA，∠BAC＝∠DAC，∴∠BCA＝∠BAC，∴AB＝BC＝1，∵BC＝AD，∴AD＝2，∵∠ABD＝90°，∴BD＝＝＝，由（1）得：四边形BCDE为菱形，∵E为AD的中点，∴△BDE的面积＝△ABE的面积，∴菱形BCDE的面积＝2△BDE的面积＝△ABD的面积＝AB×BD＝×1×＝．15．证明：（1）∵四边形ABCD是矩形，∴OB＝OD，∵AE∥CF，∴∠E＝∠F，∠OBE＝∠ODF，在△BOE与△DOF中，，∴△BOE≌△DOF（AAS）；（2）当EF⊥AC时，四边形AECF是菱形．证明：∵△BOE≌△DOF，∴OE＝OF，∵四边形ABCD是矩形，∴OA＝OC，∴四边形AECF是平行四边形，∵EF⊥AC，∴四边形AECF是菱形．16．（1）证明：在△ACD中，点O，E分别为边AC，AD中点，∴OE为△ACD的中位线，∴OE∥CD，，又∵，∴OF∥CD，OF＝CD，∴四边形OCDF为平行四边形，∴FD∥OC，FD＝OC，∴∠GFD＝∠GCO，∠GDF＝∠GOC，∴△FGD≌△HGO（ASA）；（2）解：当时，四边形FOCD是菱形，理由如下：∵四边形ABCD是平行四边形，∴AB＝CD，OC＝AC，∵AB＝AC，∴AB＝CD＝OC，由（1）得：四边形OCDF为平行四边形，∴平行四边形FOCD是菱形，17．（1）证明：∵四边形ABCD是平行四边形，∴AB＝CD，AB∥CD，∴∠BAE＝∠CFE，∵点E是▱ABCD中BC边的中点，∴BE＝CE，∵∠AEB＝∠FEC，∴△ABE≌△FCE（AAS），∴AB＝FC，∵AB∥FC，∴四边形ABFC是平行四边形，又∵AF＝BC，∴平行四边形ABFC为矩形；（2）解：由（1）得：四边形ABFC为矩形，∴∠ACF＝90°，∵△AFD是等边三角形，∴AF＝DF＝6，CF＝DF＝3，∴AC＝＝＝3，∴四边形ABFC的面积＝AC×CF＝3×3＝9．18．证明：（1）∵四边形ABCD是菱形，∴AD∥BC，∵CF∥AE，∴四边形AECF是平行四边形，∵AE⊥BC，∴四边形AECF是矩形；（2）连接OE，在菱形ABCD中，AD＝AB＝BC＝5，AO＝CO，∴∠OEC＝∠OCE，由（1）知，四边形AECF为矩形；∴∠AEC＝90°，∵AE＝4，∴BE＝＝3，∴CE＝3+5＝8，在Rt△AEC中，AE＝4，CE＝8，∴AC＝，∵AO＝CO，∴OE＝AC＝2．19．证明：（1）∵四边形ABCD是矩形，∴AB＝CD，AB∥CD，∴∠BAE＝∠DCF，又∵BE⊥AC，DF⊥AC，∴∠AEB＝∠CFD＝90°，在△ABE和△CDF中，，∴△ABE≌△CDF（AAS）；（2）由（1）得：△ABE≌△CDF，∴BE＝DF，又∵BE⊥AC，DF⊥AC，∴BE∥DF，∴四边形BFDE是平行四边形．20．（1）证明：∵四边形ABCD是菱形，∴∠B＝∠D，AB＝BC＝DC＝AD，∵点E，O，F分别为AB，AC，AD的中点，∴AE＝BE＝DF＝AF，OF＝DC，OE＝BC，OE∥BC，在△BCE和△DCF中，，∴△BCE≌△DCF（SAS）；（2）解：当AB⊥BC时，四边形AEOF是正方形，理由如下：由（1）得：AE＝OE＝OF＝AF，∴四边形AEOF是菱形，∵AB⊥BC，OE∥BC，∴OE⊥AB，∴∠AEO＝90°，∴四边形AEOF是正方形．21．（1）解：∵四边形ABCD是菱形，∴AB∥CD，∴∠1＝∠ACD，∵∠1＝∠2，∴∠ACD＝∠2，∴MC＝MD，∵ME⊥CD，∴CD＝2CE，∵CE＝1，∴CD＝2，∴BC＝CD＝2；（2）证明：如图，∵F为边BC的中点，∴BF＝CF＝BC，∴CF＝CE，在菱形ABCD中，AC平分∠BCD，∴∠ACB＝∠ACD，在△CEM和△CFM中，∵，∴△CEM≌△CFM（SAS），∴ME＝MF，延长AB交DF的延长线于点G，∵AB∥CD，∴∠G＝∠2，∵∠1＝∠2，∴∠1＝∠G，∴AM＝MG，在△CDF和△BGF中，∵，∴△CDF≌△BGF（AAS），∴GF＝DF，由图形可知，GM＝GF+MF，∴AM＝DF+ME．。
学英语报第31期能力提升第七单元至第九单元英语广东卷
学英语报第31期能力提升第七单元至第九单元英语广东卷1、Many people prefer the bowls made of steel to the _____ made of plastic. [单选题] *A. itB. ones(正确答案)C. oneD. them2、You should _______ your card. [单选题] *A. drawB. depositC. investD. insert(正确答案)3、My father and I often go ______ on weekends so I can ______ very well. （）[单选题] *A. swim; swimmingB. swims; swimC. swimming; swimmingD. swimming; swim(正确答案)4、11．________ big furniture shop it is! [单选题] *A．HowB．WhatC．What a (正确答案)D．What an5、51．People usually ________ the prices before they buy something. [单选题] * A．receiveB．payC．spendD．compare(正确答案)6、I will _______ at the school gate. [单选题] *A. pick you up(正确答案)B. pick up youC. pick you outD. pick out you7、These oranges look nice, but _______ very sour. [单选题] *A. feelB. taste(正确答案)C. soundD. look8、There may be something wrong with her _______. She can’t see things clearly. [单选题] *A. eyes(正确答案)B. earsC. mouthD. nose9、—______ do you pay for it? —Over the Internet. （）[单选题] *A. WhatB. How muchC. How(正确答案)D. When10、The children are playing wildly and making a lot of?_______. [单选题] *A. cryB. voicesC. noises(正确答案)D. music11、I’m not sure whether we’ll go on ______ foot or by _____ bike? [单选题] *A. the; theB. /; theC. /; /(正确答案)D. the; /12、Will you please say it again? I _______ you. [单选题] *A. didn’t hear(正确答案)B. don’t heardC. didn’t heardD. don’t hear13、How _______ it rained yesterday! We had to cancel(取消) our football match. [单选题] *A. heavily(正确答案)B. lightC. lightlyD. heavy14、His remarks _____me that I had made the right decision. [单选题] *A.ensuredB.insuredC.assured(正确答案)D.assumed15、Two（）in our school were sent to a remote village to teach for a month. [单选题] *A. women teachers(正确答案)B. woman teachersC. women teacherD. woman teacher16、I like dancing, ______ I can join the Dancing Club.（）[单选题] *A. becauseB. so(正确答案)C. andD. but17、The house is well decorated _____ the disarrangement of a few photos. [单选题] *A. exceptB. besidesC. except for(正确答案)D. in addition to18、96．Let's cross the street from school. There is a park ______ the school. [单选题] *A．far fromB．next toC．atD．opposite(正确答案)19、33．Will Mary's mother ______ this afternoon? [单选题] *A．goes to see a filmB．go to the filmC．see a film(正确答案)D．goes to the film20、6．Hi, boys and girls. How are you ________ your posters for the coming English Festival at school? [单选题] *A．getting onB．getting offC．getting with (正确答案)D．getting21、He always ______ the teacher carefully in class. [单选题] *A. listensB. listens to(正确答案)C. hearsD. hears of22、The rain is very heavy _______ we have to stay at home. [单选题] *A. butB. becauseC. so(正确答案)D. and23、85．You’d better? ? ? ? ? a taxi, or you’ll be late. [单选题] * A．take(正确答案)B．takingC．tookD．to take24、The work will be finished _______ this month. [单选题] *A. at the endB. in the endC. by the endD. at the end of(正确答案)25、Both Mary and Linda don't care for fish. [单选题] *A. 喜欢(正确答案)B. 关心C. 照料D. 在乎26、Don’t ______. He is OK. [单选题] *A. worriedB. worry(正确答案)C. worried aboutD. worry about27、Mrs. Green has given us some _______ on how to study English well. [单选题] *A. practiceB. newsC. messagesD. suggestions(正确答案)28、The street was named _____ George Washington who led the American war for independence. [单选题] *A. fromB. withC. asD. after(正确答案)29、( ) You had your birthday party the other day,_________ [单选题] *A. hadn't you?B. had you?C. did you?D. didn't you?(正确答案)30、--_______ does Ben go to school?--By bus. [单选题] *A. How(正确答案)B. WhatC. WhereD. Why。
2023学年九年级数学上册重要考点题精讲精练(人教版) 一元二次方程单元测试(提升)(解析版)
一元二次方程单元测试（提升）(答案版)一、单选题1．已知一元二次方程x2﹣6x+c＝0有一个根为2 则另一根及c的值分别为（）A．2 8B．3 4C．4 3D．4 8【答案】D【解析】【解答】解：设方程的另一个根为t根据题意得t+2＝6 2t＝c解得t＝4 c＝8.故答案为：D.【分析】设方程的另一个根为t 利用根与系数的关系可得t+2＝6 2t＝c 据此解答即可.2．下列方程中是一元二次方程的是（）A．ax2+bx+c＝0B．4x2+3 √x-1＝0C．x2+4＝0D．3x2+x+ 1x＝0【答案】C【解析】【解答】A、当a≠0时ax2+bx+c＝0是一元二次方程故此选项不符合题意；B、4x2+3 √x-1＝0不是一元二次方程故此选项不合题意；C、x2+4＝0是一元二次方程故此选项符合题意；D、3x2+x+ 1x＝0含有分式不是一元二次方程故此选项不合题意；故答案为：C．【分析】只含有一个未知数（一元）并且未知数项的最高次数是2（二次）的整式方程叫做一元二次方程根据一元二次方程的定义对每个选项一一判断即可。
3．方程（x-1）2=16的解是（）A．x1=5 x2=-3B．x1=-5 x2=4C．x1=17 x2=-15D．x1=5 x2=-5【答案】A【解析】【解答】解：（x-1）2=16 ∴x-1=±4 ∴x1=5 x2=-3．故答案为：A．【分析】由题意两边直接开平方即可求解。
4．下列结论：①若x2=16则x=4；②方程x(2x−1)=(2x−1)的解为x=1；③若分式x 2−3x+2 x−1的值为0 则x=1或x=2．正确的有（）A．0个B．1个C．2个D．3个【答案】A【解析】【解答】解：①若x2＝16 则x＝±4 不符合题意；②移项得：x（2x﹣1）﹣（2x﹣1）＝0（2x﹣1）（x﹣1）＝0解得：x1＝12x2＝1 不符合题意；③根据题意得：（x﹣1）（x﹣2）＝0 且x﹣1≠0解得：x＝2 不符合题意；故答案为：A【分析】根据平方根、因式分解法及分式的值为0的解法逐项判断即可。
Unit 2 Saving the Earth(能力提升)-2020-2021学年九年级英语上册单元测试定心卷(仁爱版)(原卷版)
Unit 2 检测题1．---What are you going to do next weekend?---I _____ yet. Do you have any good ideas?A．haven't decided B．won't decideC．have decided D．didn't decide2．Trees can stop the sand towards the rich farmland in the south.A．to move B．move C．from moving D．moves3．We should use sides of paper.A．all B．each C．neither D．both4．—He’s never stolen anything before, he?—. It’s his third time to be taken to the police station.A．hasn’t; Yes B．hasn’t; No C．has; Yes D．has; No5.If we travel a short distance, we should walk _____ taking a bus. Then we’ll be greener people.A.instead ofB.ratherC.whileD.but6.She bought a skate board online _____ she saved a lot of time.A.so thatB.as soon asC.such thatD.no matter7.You ought to return the book to the school library _____. Other students will borrow it.A.at timesB.in timeC.on timeD.at the same time8.He said that he _____ to Canada a few years ago.A.had been toB.have been toC.wentD.go9. I will never forget the day ________ we spent in the old town with small houses.A. whoB. whomC. thatD. what10. We are supposed to ________ a solution to stop people from looking down at their mobile phones while driving cars.A. come up withB. come formC. come outD. come true二、完形填空Jack is a little schoolboy. He lives in a small town in England. His father works in a factory in London. One day his mother 11 him to post a letter to his father.Jack walked down the street. He didn’t see a letter box on the street. But he really 12 a basket with a sign on it.The sign said, “PUT LITTER IN THIS BASKET”. “I can read,” thought Jack, but he couldn’t13 the word “letter” right.Jack dropped the letter in the basket. Then he ran 14 to tell his mother about the basket.“Oh, no, child!” said his mother, “You put the letter in a basket. That litter basket is15 old paper and other useless things.”“Oh,”said Jack,“does the16 on the basket mean that?”“Yes, it does,”said his mother,“The word is‘litter’not‘letter’. Now get the letter and post it.”When Jack got there, a man was putting the old 17 in a truck.“Stop!”shouted Jack, and he began to tell the man about the letter.The man helped him to look for the letter. After a while they 18 it.Then Jack put the 19 in the letter box. He said,“20 don’t they tell us all the words when we first go to school? Then things like that can’t happen.”11．A．said B．told C．spoke D．talked12．A．saw B．took C．brought D．watched13．A．read B．look C．spell D．give14．A．away B．out C．in D．from,15．A．to B．on C．with D．for16．A．letter B．word C．sentence D．sound17．A．litter B．basket C．box D．paper18．A．heard B．finished C．worked D．got19．A．paper B．basket C．sing D．letter20．A．How B．What C．Why D．When三、阅读理解AWhat do people do with their old, out of date but still useful computers? Most people don’t know what to do with them. Many old computers are put away in homes. Many more are simply thrown away as the rubbish.Finally, some companies are thinking of ways to bring down the number of old computers. Sony has agreed to help recycle old Sony products(产品). Dell, Hewlett Packard and other companies now also take back some old computers.In some countries, laws have been passed, too. Computer companies have to pay for collecting and recyclingtheir used products. And 70% of computer waste must be recycled. The idea behind the laws is that computer companies themselves should pay for the cost. That will encourage them to make computers that are easier and cheaper to repair and upgrade(升级).Yet while many people are throwing away good computers, others cannot afford them at all. Hundreds of organizations are working to solve this problem. They collect and repair old computers. Some also teach others how to repair computers. The computers then go to schools, charities(慈善团体) and people who need them. Giving a used computer to one of these organizations can turn one person’s rubbish into someone else’s useful things and cut down waste, too.21．What do many people do with old computers?A．They repair them. B．They sell them.C．They send them to others. D．They stop using them.22．How many computer companies are mentioned in the second paragraph？A．One. B．Two. C．Three. D．Four.23．According to the laws in some countries, computer companies must .A．recycle most of their productsB．collect all their used productsC．repair and upgrade old computersD．make more cheaper computers24．What do the organizations do to solve the problem of old computers?A．Help the computer companies to collect them.B．Repair and send them to those who need them.C．Help people to learn to use them.D．Turn rubbish into useful things.25．What is the main idea of this passage?A．Repairing old computers.B．Encouraging to make cheap computers.C．Recycling old computers.D．Helping those who need computers.BIt’s important to learn things about protecting environment. Here’s a 4Rs rule for us.·ReduceIf you want to reduce waste, you should use things wisely (明智的). A large number of trees are being cut down to make paper. If everyone uses paper carelessly and then throws it away, soon we would not have any trees left. Some other things are also being wasted, and people don’t know what to do with waste in big cities, so it’s necessary to reduce waste.·ReuseYou should always think of reusing the usable (可用的) things before throwing them away. Give your clothes or things you don’t use to the poor. In a family, you may pass such clothes on to your younger brothers or sisters.·RecycleBottles, cans and paper can easily be recycled. By doing so we save lots of time and money, for example, cola cans are sent to a factory, where they’re smashed flat（压平）and smelted (熔化), and the metal things are made into new cola cans.·RepairIf one of the legs of your t able is broken, you can repair it. If you want to change for better ones, it’s better for you to sell the old ones or give them to other people who can use them after doing some repair.26.The “Reduce” rule mainly requires us_____.A.to use things wiselyB.to cut down many treesC.to use paper carelesslyD.to use more and more things27.What’s the right order of recycling cola cans?a.smash them flatb.collect the used cansc.smelt themd.send them to a factoryA. a-b-c-dB.d-c-b-aC.b-d-a-cD.b-d-c-a28.The “Reuse” rule mainly requires us_____.A.to throw away the old clothesB.to collect waste paper and soft drink cansC.to use both sides of paperD.to give the old but usable things to the poor29.Which sentence is about the “Repair” rule?A.When you leave a room, turn off the lights.B.Take a cloth bag when you go shopping.C.Don’t use plastic bags.D.If your chair is broken, you can repair it.30.Which is the best title for this passage?A.A 4Rs ruleB.Protect the environmentC.Save energyD.Good habitsCFrom my father I have learned a lot. And I’m very thankful to him. I remember when I was a child my father always got up very early, quietly putting on his clothes and going off to work. To arrive in time to open his tiny store at 8:30, he needed to leave our apartment at 6:30. After all, he had to take a bus and then the subway. The last journey was a long walk through a neighborhood much of which was full of the smell of rubbish. I learned: it is very important to work. No excuse.When I was 12, I would, on some Saturdays, go to my father’s store to help out. After helping set up the outside clothing display, for the rest of the day, I’d watch to make sure no one stole anything. When I noticed someone looking unusual or strange, I w ould look the person in the eye, smile and say, “May I help you?” Usually that worked, but sometimes, someone would run off with something. The first time, I ran after the thief but my father shouted, “Martin, stop! There is no need to do that.” It’s true that safety is more important than money.After 10 years of hard work, he saved up enough money to buy his first car, a cheap one—he wouldn't buy one until he could afford to pay for it without borrowing money. I learned: buy onlywhat you can afford. Buying necessary food and clothing won't make us go in debt(债务).Theunnecessary things won't give us happiness, which comes from achievement only.31. What shop did the author’s father own?A. A bookshop.B. A coffee shop.C. A clothing shop.D. A food shop.32. Which of the following is NOT true according to the passage?A. The author ran after thieves many times.B. The author thanked his father a lot.C. The author’s father worked very hard.D. The author’s father made some money.33. All the following are talked about in the passage EXCEPT .A. the importance of workingB. the good ways to keep healthyC. that safety comes before moneyD. that it’s bad to spend more than you make34. According to the author, what usually makes people go in debt?A. To rent a house for the family.B. To send their children to school.C. To enjoy something unnecessary.D. To buy enough food for the family.35. What is the passage mainly about?A. How to live a happy life.B. What makes a person successful.C. The help the author got from his father.D. What the author learned from his father.DWang Fengqin, a 61-year-old woman in Beijing, volunteers to sort(分类)rubbish in her living area in Beijing’s Chaoyang District.At 6:30 every morning ,while half of Beijing is still in sleeping dreams in bed or enjoying a delicious breakfast, 36．. She gets up, gives her face a quick wash, takes a simple breakfast and rushes to the four rubbish dustbins beside the gate of her living area. There she checks the waste left by her neighbors to make sure it is sorted correctly.“Sorting rubbish will improve the environment for all of us and it only takes a minute,” Wang said. “ 37．.”As Wang spoke, an old man came by and threw a plastic bag full of rubbish into the dustbinmarked “recyclable”.“Hey, please, there are some orange peels（皮）and fish bones in your bag, 38．,” Wang told him.Teaching the old man was in a hurry, Wang let him go, opened the bag herself, picked out the kitchen waste and threw it in the right dustbin.Wang has been doing this every day from 7:30 a. m. to 9 a. m. and from 6 p. m. to 8 p. m. since March 10. 39．.Most people had no idea about sorting rubbish at first, but now 90 percent can put rubbish in the correct dustbin, Wang says. However, 40．.A．I want to help my neighbors develop good habitsB．she plans to keep doing this job until all her neighbors sort correctlyC．so they are supposed to be put into the dustbin marked ‘kitchen waste’D．She says people usually go downstairs and throw out rubbish at this timeE.Wang rushes through her busiest hours in the day.四、任务型阅读Here is a page from a magazine named Future. Read the following information about things that may happen in ten years.ACars will run on solar power or electricity and will be much cleaner. They will be much safer. For example, if you are too close to another car or if you are driving dangerously, your car will slow down by itself.BBecause there won’t be any spare land, new cities will have to be built in t he sea. Some cities on water will have two levels. People will live on the upper level; the lower level will be used for traffic, shops and factories.CBiotechnology(生物工艺学) will make food better and healthier. Plants that are not affected by insects or illnesses will be developed. The taste of fruits and vegetables will be better and food will be kept longer.DNew technology will be used to make TVs that are only 5cm thick. They will have pictures that are as clear as photos. Electrical appliances(设备) will be quieter and will be controlled by computers; they will also use 50% less power.EMany new ways to cure illnesses will be successful by using products of genetic engineering. Cures will be found for the flu and the common cold. However, some new illnesses will appear.根据短文内容完成句子。
人教版九年级上册数学 第二十一章 一元二次方程 单元提升测试卷
人教版九年级上册数学第二十一章 一元二次方程 单元提升测试卷一.单选题（本大题共12小题，每小题3分，共36分)1．一元二次方程2250x -=的解为（ ）A ．125x x ==B ．15=x ，25x =-C ．125x x ==-D ．1225x x == 2．若函数y ＝ax 2﹣x+1（a 为常数）的图象与x 轴只有一个交点，那么a 满足( )A ．a ＝14B ．a≤14C ．a ＝0或a ＝﹣14D ．a ＝0或a ＝143．已知m 为方程2320220x x +-=的根，那么32220252022m m m +-+的值为（ ）A ．2022-B ．0C ．2022D ．40444．如图，有一面积为2600m 的长方形鸡场，鸡场的一边靠墙（墙长35m ），另三边用竹篱笆围成，其中一边开有1m 的门，竹篱笆的总长为69m ．设鸡场垂直于墙的一边为m x ，则列方程正确的是（ ）A ．(6912)600x x +-=B ．(6912)600x x --=C ．(692)600x x -=D ．(3512)600x x +-=5．设a ，b 是方程220220x x +-=的两个实数根，则22a a b ++的值为（ ）A ．2020B ．2021C ．2022D ．20236．关于x 的方程2320x kx --=实数根的情况，下列判断正确的是（ ）A ．有两个相等实数根B ．有两个不相等实数根C ．没有实数根D ．有一个实数根A ．某小区新增了一家快递店，第一天揽件200件，第三天揽件242件，设该快递店揽件日平均增长率为x ，根据题意，下面所列方程正确的是（ ）8．()22001242x += B ．()22001242x -= C ．()20012242x += D ．()20012242x -= 7．若关于x 的一元二次方程()21220m x x -+-=没有实数根，则实数m 的取值范围是（ ）A ．12m <B ．12m >C ．12m >且1m ≠D ．1m ≠9．若关于x 的一元二次方程2220ax bx +-=的一个根是2022x =，则一元二次方程()22212a x bxb +++=必有一根为（ ）．A ．2020B ．2021C ．2022D ．2023 10．已知226A x x n =++，222423B x x n =+++，下列结论正确的个数为( )①若226A x x n =++是完全平方式，则3n =±；②B－A 的最小值是2；③若n 是0A B +=的一个根，则2216549n n +=； ④若()()202220192A A --=，则()()22202220194A A -+-=A ．1个B ．2个C ．3个D ．4个11．距考试还有20天的时间，为鼓舞干劲，老师要求班上每一名同学要给同组的其他同学写一份拼搏进取的留言，琪琪所在的小组共写了30份留言，该小组共有（ ）A ．7人B ．6人C ．5人D ．4人12.若关于x 的一元二次方程222410x mx m m -+--=有两个实数根1x ，2x ，且()()121222217x x x x ++-=，则m =（） A ．2或6 B ．2或8 C ．2 D ．6二.填空题（本大题共8小题，每小题3分，共24分)13．某公司5月份的营业额为25万，7月份的营业额为36万，已知6、7月的增长率相同，则增长率为_____．14．关于x 的一元二次方程2x 2+4mx+m=0有两个不同的实数根x 1，x 2，且2212316x x +=，则m=__________． 15．如果关于x 的一元二次方程260x x m -+=有实数根，那么m 的取值范围是__ _．16．若一元二次方程20x bx c ++=（b ，c 为常数）的两根12,x x 满足1231,13x x -<<-<<，则符合条件的一个方程为___ _．17．若m ，n 是一元二次方程2310x x +-=的两个实数根，则3231m m nm +-的值为___________．18．若关于x 的方程||1(1)450k k x x +--+=是一元二次方程，则k =________．19．已知一元二次方程ax 2+bx+c=0（a≠0），下列结论：①若方程两根为-1和2，则2a+c=0；②若b ＞a+c ，则方程有两个不相等的实数根；③若b=2a+3c ，则方程有两个不相等的实数根；④若m 是方程的一个根，则一定有b 2-4ac=（2am+b ）2成立．其中结论正确的序号是__________．20．目前以5G 等为代表的战略性新兴产业蓬勃发展，某市2021年底有5G 用户20万户，计划到2023年底该市5G 用户数累计达到33.8万户，设该市5G 用户数年平均增长率为x ，则x 的值是______．三.解答题（本大题共5小题，每小题8分，共40分)21．解下列方程．(1) 2x 2－3x －1＝0 (2) x 2＋2x ＝022．已知关于x 的一元二次方程22230x x m --=．(1)求证：方程总有两个不相等的实数根；(2)若方程的两个实数根分别为α，β，且25αβ+=，求m 的值．23．冬奥会特许商店将进货价为每个30元的冰墩墩饰品以40元的价格售出，平均每月能售出600个，调查表明：这种冰墩墩饰品的售价每上涨1元，其销售量就减少10个，同时规定售价在40-60元范围内．(1)当售价上涨x元时，销售量为______个；(2)为了实现销售这种饰品平均每月10000元的销售利润，每个饰品应定为多少元？这时售出冰墩墩饰品多少个？24．已知关于x的一元二次方程x2﹣（m+3）x+3m＝0．(1)求证：无论m取任何实数，方程总有实数根；(2)若等腰三角形的其中一边为4，另两边是这个方程的两根，求m的值．25．建设美丽城市，改造老旧小区．某市2019年投入资金2000万元，2021年投入资金2880万元，现假定每年投入资金的增长率相同．(1)求该市改造老旧小区投入资金的年平均增长率；(2)2021年老旧小区改造的平均费用为每个80万元．2022年为提高老旧小区品质，每个小区改造费用增加15%．如果投入资金年增长率保持不变，求该市在2022年最多可以改造多少个老旧小区？。
Unit 3 English Around the World(能力提升)-2020-2021学年九年级英语上册单元测试(仁爱版)(解析版)
Unit 3 检测题一、单选题1．all the people，he is the most helpful. He thinks that to help others is just like to help himself.A．Of B．With C．As D．In1.A【解析】句意：在所有的人中，他是最有帮助的。
他认为帮助别人就像帮助自己一样。
考查介词。
A. Of属于；B. With用，伴随；C. As作为，因为；D. In在……里面；of是表示整体与部分的关系，of all是最高级的标志，故选A。
2．China has become a/an country, and more and more foreigners start to learn Chinese.A．bigger B．smaller C．powerful D．eastern2．C【解析】句意：中国已成为一个强大的国家，越来越多的外国人开始学习汉语。
考查形容词词义辨析。
A. bigger更大；B. smaller更小；C. powerful强大的；D. eastern东方的；根据句意是因为越来越多的外国人开始学习汉语，所以中国已经成为一个强大的国家，并无比较之意，故选C。
3．The sick girl _______ to the hospital at once.A．must send B．must is sent C．must be sent D．be sent3．C【解析】句意：必须马上把那个生病的女孩送到医院去。
考查情态动词被动语态。
情态动词被动语态的句型是情态动词+be+been的结构，根据句意是生病的女孩必须被送到医院，所以是must be sent to the hospital，故选C。
4．His methods are regarded as the of working by his leaders and workmates.A．base B．based C．basic D．basing4．A【解析】句意：他的方法被领导和同事视为工作的基础。
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单元能力提升九
Ⅰ.完形填空
My family live in a small town.We usually have a __1__ before the New Year for our friends and neighbors.We often ask them to bring __2__ for someone in need instead of(代替) gifts for us.For example, they can bring food for a __3__ family or clothes for charities(慈善机构). It is always fun and everyone has a good time.
Last year, I was ill(病的) on the day of my party and went to the __4__. As a result, I didn't have the party. Everyone was disappointed(失望的), __5__ I decided to have it two weeks later.
We asked for children's hats for a charity. We __6__ asked for reading glasses for the city library, so those who needed glasses or forgot __7__ could work on computers or read books in the library.
We __8__ about 100 people to the party. It was snowy that day but everyone came to the party. We got 83 hats and 47 pairs of glasses! We were __9__ that people could be so generous(慷慨的) in helping others.
If you __10__ to have a party, think about doing the same thing.Others will benefit(使受益) much more than we would with lots of gifts.
( )1.A.opening B. test C. party D. calendar
( )2.A.something B. everything C. anything D. nothing
( )3.A.bored B. rich C. lucky D. poor
( )4.A.library B. hospital C. restaurant D. bookstore
( )5.A.but B. or C. and D. so
( )6.A.also B. already C. ever D. just
( )7.A.hers B. his C. ours D. theirs
( )8.A.invited B. replied C. remembered D. agreed
( )9.A.afraid B. surprised C. sad D. creative
( )10.A.catch B. send C. prepare D. delete
Ⅱ.任务型阅读
It's nice to be invited to birthday parties, but sometimes you have to say no.How do you politely refuse an invitation?
◆Send it in.
If you get a written or email invitation to a party, refusing politely is easy. All you have to do is to give a polite answer.
◆Ask for time to think.
Refusing a facetoface invitation can be difficult. The polite way is to ask for time to check your calendar. Then, you have time to find a polite answer. Just make sure that if you've been invited in person, you'd better refuse it in person. It's polite.
◆Be thankful.
Even if you have to refuse the invitation, thank him or her for the invitation all the same.Stay positive. If your only reason is a conflicting(相互冲突的) event, tell the host that you will come if the dates are different.
◆Be honest(诚实的).
This may be the most important thing in politely refusing an invitation.You wouldn't want people to lie(说谎) to you, so it's correct etiquette(礼节) to give an honest reason.Just say it in a polite way.
根据短文内容，回答问题。
1. What is the main idea of the passage?
________________________________________________________________________
2. How many pieces of advice does the writer give?
________________________________________________________________________
3. How can we refuse a facetoface invitation?
________________________________________________________________________
4. What should we tell the host if an invitation is conflicting with another event?
________________________________________________________________________ 5. What is the most important to refuse an invitation?
________________________________________________________________________
详解详析
Ⅰ.1.C 句意：我们通常会为朋友和邻居举办一个派对。
故选C。
2. A 句意：我们经常叫他们给有需要的人带一些东西而不是给我们带礼物。
故选A。
3. D 句意：他们可以给贫穷的家庭带来食物或者给慈善机构带来衣服。
故选D。
4. B 句意：去年，我在派对的那天生病了，去了医院。
故选B。
5. D 句意：每个人都很失望，所以我决定两周后举办派对。
故选D。
6. A
7. D 句意：那些需要眼镜的人或者忘了带他们的眼镜的人可以在图书馆的电脑上工作或者阅读。
8. A 句意：我们邀请了大约100人参加我们的派对。
故选A。
9. B 句意：对于人们可以那么慷慨地帮助别人，我们感到很惊喜。
故选B。
10. C
Ⅱ.1.How to politely refuse an invitation.
2. Four.
3. We can ask for time to check the calendar.
4. We will come if the dates are different.
5. To be honest.。