闵行区2008学年第二学期九年级质量调研考试
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上海闵行区2023-2024学年第二学期高三年级学业质量调研英语试卷(考试时间120分钟,试卷满分140分)I.Listening ComprehensionSection ADirections:In Section A,you will hear ten short conversations between two speakers.At the end of each conversation,a question will be asked about what was said.The conversations and the questions will be spoken only once.After you hear a conversation and the question about it,read the four possible answers on your paper,and decide which one is the best answer to the question you have heard.1.A.A fridge. B.An electric cooker. undry machines. D.Dishes.2.A.$450. B.$500. C.$550. D.$510.3.A.Flowers. B.A gardening tool. C.Cooking appliances. D.A cookbook.4.A.Disappointed. B.Proud. C.Confident. D.Encouraged.5.A.The man. B.The woman. C.Their boss. D.Sarah.6.A.At a concert venue. B.At a movie theater.C.At a hotel reception.D.At a restaurant.7.A.Keep playing video games. B.Get more sleep.C.Buy a comfortable bed.D.Establish a regular bedtime.8.A.She is confused about the software program as well.B.She understands the software program completely.C.She doesn’t care about the software program.D.She has lost the software password.9.A.He wants more recognition for his volunteer work.B.He prefers to keep his volunteer work private.C.He regrets volunteering at the animal shelter.D.He wants to discuss his volunteer work further.10.A.The students were interested in sharing.B.The students were eager to learn knowledge.C.The students were amazed at the learning material.D.The students were respectful towards the teacher.Section BDirections:In Section B,you will hear two short passages and one longer conversation,and you will be asked several questions on each of the passages and the conversation.The passages and the conversation will be read twice,but the questions will be spoken only once.When you hear a question,read the four possible answers on your paper and decide which one would be the best answer to the question you have heard.Questions11through13are based on the following talk.11.A.In her arm. B.In her lung. C.On her shoulder. D.In her back.12.A.Over five years. B.About three months.C.Less than two weeks.D.A few months.13.A.To find ways to help Mrs.Smith’s family.B.To hear an update on Mrs.Smith’s situation.C.To figure out what’s wrong with Mrs.Smith.D.To discuss the company’s helping policies.Questions14through16are based on the following talk.14.A.Improving artistic theory. B.Putting forward flow theory.C.Holding attractive activities.D.Studying business matters.15.A.To promote the painters’spirit. B.To discover the exception to the theory.C.To study the way to get the flow state.D.To discover the best flow quality.16.A.When they consider nothing seems to matter.B.When they began to learn new skills.C.When they work in different professions.D.When they are engaged in their pursuits.Questions17through20are based on the following conversation.17.A.It was stolen. B.It was involved in an accident.C.It ran out of gas.D.It was parked illegally and pulled away.18.A.It’s only for loading purposes. B.It’s reserved for motorcycles.C.It’s free for anyone to park there.D.It’s for library use only.19.A.The parking services office. B.The main entrance of the library.C.The vehicle storage facility.D.The campus gymnasium.20.A.$10 B.$50 C.$75 D.$85II.Grammar and VocabularySection ADirections:After reading the passage below,fill in the blanks to make the passage coherent and grammatically correct.For the blanks with a given word,fill in each blank with the proper form of the given word;for the other blanks,use one word that best fits each blank.By day,Robert Titterton is a lawyer.In his spare time,he goes on stage beside pianist Maria Raspopova—not as a musician but as her page-turner.“(21)________not being a trained musician,I’ve learned to read music to assist Maria in her performance.”Mr Titterton is chairman of the Omega Ensemble but(22)________(act)as the group’s official page-turner for the past four years.His job is to sit beside the pianist and turn the pages of the score.In this way,the musicians don’t have to break the flow of sound by doing it (23)________.He said he became just as nervous as those playing instruments on stage.Being a page-turner requires plenty of practice.Some pieces of music(24)________go for 40minutes and require up to50pages of turns,including back turns for repeat passages.(25)________matters is onstage communication.Each pianist has their own style of“nodding”(26)________(indicate)a page turn that they need to practise with their page-turner.But like all performances,there are moments(27)________things go wrong.“I was turning the page to get ready for the next page,but the draft wind from the turn caused the spare pages to fall off the stand,”Mr Titterton said,“Luckily,I was able to catch them and put them back.”(28)________most page-turners are piano students or up-and-coming concert pianists,Ms Raspopova has once asked her husband to help her out on stage.“Sometimes my husband is not an attentive page-turner.He’s interested in the music,(29)________(feel)every note,but I have to say:‘Turn,turn!’”she laughed.“But Robert is(30)________(qualified)page-turner I’ve had in my entire life.”Section BDirections:Complete the following passage by using the words in the box.Each word can only be used once.Note that there is one word more than you need.A.contrastB.instructedC.concentratingD.potentialE.touchingF.playedG.betterH.specializedI.spotJ.followK.tracingUnfamiliar Music May Help People Chat at PartiesIf you want your guests to be particularly sociable at an upcoming party,make sure you play music they probably haven’t heard before.To explore how background music affects the way we31conversations,researchers Jane Brown and Gavin Bidelman conducted a study analyzing the brain activity of31individualsaged21and33.During the experiment,participants listened to72minutes of an audiobook(有声读物),which the pair used as a replacement for32on someone talking,while background music was accompanied by the audiobook for most of the time.For half of the experiment,the participants were asked to focus on2-minute parts of an unfamiliar audiobook read by a man.The rest of the time,they were told to focus on four background songs,which were similarly33for2minutes at a time.This34in voices aimed to assess participants’ability to shift attention between two distinctly different voices.During the experiment,all the participants wore35caps to monitor the electrical activity taking place in their brains.This36of electrical activity was the key.It allowed Brown and Bidelman to discover how efficiently these individuals could focus on either the audiobook or the music when37to do so.The finding revealed that the participants could38turn their attention to the audiobook if the background music was unfamiliar to them.Following the task,the participants completed a music perception survey evaluating their musical skills,such as the capacity to39whether a pair of similar-sounding tunes are the same.Notably,those with lower musical scores demonstrated slower attentional shifts between songs and audiobooks,suggesting a(n)40link between musical ability and attention management skills.III.Reading ComprehensionSection ADirections:For each blank in the following passage there are four words or phrases marked A,B, C and D.Fill in each blank with the word or phrase that best fits the context.In Favour of Simple WritingDo you edit text messages carefully before sending them?If so,you may be the kind of person who takes pride in41even the simplest message.If you do not,you may see yourself as a go-getter,one who values excitement and speed over42:get it done decently now rather than perfectly later.People are constantly receiving messages,from the mailbox to the inbox to the text-message alert.What to read,what to skim(略读)and what to ignore are decisions that nearly everyone has to make dozens of times a day.A new book titled All Readers are Busy Nowadays makes the argument for being the careful kind of43,even in informal lines.The authors also present well-established44that have long been prized in guides to writing.Take“less is more”.Most books on writing well advocate the advice to45needless words.The authors,however,have46the idea.In an email to thousands of school-board members asking them to take a survey,cutting the count from127to49words almost47 the response rate.Keeping messages to a48idea—or as few as absolutely needed—helps ensure that they will be read,remembered and acted on.49the number of the available options has thesame effect,too.A link in an email,50,attracted50%more clicks when presented alone than when it was sent alongside a second additional link.Syntax(句法)and51matter,too.It is more52to adopt short and active sentences,with common words familiar to everyone.From Facebook posts to online-travel reviews,even brief,informal pieces of writing that follow these rules get more likes and shares.If everyone is a busy reader,everyone is a busy writer,too.That may make it tempting to sent as many messages as53as possible and hope for the best.But from essays to text messages organizing dinner plans,devoting time to the needs of readers has provable54.If you are so busy that you write an undisciplined message which readers scan,ignore and delete, then you might as well have not55it at all.41.A.conveying B.understanding C.crafting D.sending42.A.care B.quantity C.simplicity D.technology43.A.reader B.poster C.learner D.writer44.A.structures B.principles C.aims D.alternatives45.A.remove B.ignore C.reconsider D.interpret46.A.conveyed B.translated C.tested D.shaped47.A.lowered B.affected C.doubled D.maintained48.A.basic B.positive C.definite D.single49.A.Recording B.Reducing C.Counting D.Estimating50.A.in comparison B.after all C.for instance D.in particular51.A.word-choice B.pattern-design C.target-setting D.platform-selection52.A.difficult B.suitable C.challenging mon53.A.carefully B.often C.politely D.quickly54.A.outcomes B.points C.figures D.benefits55.A.received B.written C.read D.answered Section BDirections:Read the following three passages.Each passage is followed by several questions or unfinished statements.For each of them there are four choices marked A,B,C and D.Choose the one that fits best according to the information given in the passage you have read.(A)Growing up in Ukraine,Vadim didn’t know what it was like to live in a safe,stable home. His parents were alcoholics who would often beat him.They’d even stuff him into a wine container,breaking his little body and leaving only a small opening at the top so he could breathe and see—but only just a little.By the time Vadim turned9,he was living in an orphanage(孤儿院).Unfortunately,as is the case with far too many little ones,his life only got worse there.Not only was he hurt,but he was placed in a room on the third floor,making it impossible to get downstairs in a wheelchair.This left Vadim crawling up and down the stairs,an activity that was both physically and mentally exhausting.He’d often be late for meals.If the food wasn’t already gone by the time he arrived,other kids would steal from him.Then,a chain effec t began when some special folks visited the orphanage.They told him a story about a spiritual figure who advocated love and forgiveness.This conv ersation helped the 14-year-old find his faith and,in turn,he had more hope than he ever had before.Today,Vadim is on longer the boy subject to fate.He is a father to his own kids,and his life couldn’t be more different or better.Over the years,he’s discovered a gift for expressing himself through art.This inspired Tim Tebow Foundation,an organization fighting for the most vulnerable(脆弱的)people around the world,to ask if he’d like to create a piece that representedwhat it looked and felt like for him to havegone from“darkness to light.”The result?A truly remarkable paintingthat features Vadim,in his wheelchair,leavingbehind his old home,including the winecontainer his parents stuffed him into.His newdirection includes a beautiful forest full of fallleaves and bright light,showing the hope he issaid to have found in the inspiring story.56.According to the passage,Vadim’s parents treated him________.A.abusivelyB.forgivinglyC.thoughtfullyD.strictly57.Why did Vadim crawl up and down the stairs when living in the orphanage?A.Because his little roommates often did damage to his wheelchair.B.Because other children would take his meal without permission.C.Because he couldn’t use the wheelchair to go downstairs from a high floor.D.Because getting downstairs was demanding for him physically and mentally.58.The phrase“a chain effec t”in paragraph4refers to_________.A.an effective treatment for Vadim’s disabilityB.a series of positive changes occurring in Vadim’s lifeC.a sense of hope from the story of a spiritual figureD.a helping hand from Tim Tebow Foundation59.What is the message that Vadim wants to convey in his remarkable painting?A.He admires the beauty and harmony of nature.B.He leads a miserable life with his own kids.C.He excels in delicate painting techniques.D.He says farewell to the past and harvests happiness.(B)The Role of Crowdfunding in Business GrowthCrowdfunding is a fundraising method that makes use of the power of the Internet and social networks.It involves raising small amounts of money from a large number of individuals or investors,typically through online platforms.These platforms connect entrepreneurs(创业者) with potential backers who contribute funds to support a specific project,business,or idea.Types of Crowdfunding●Reward-Based Crowdfunding—Backers get a reward,such as a product sample or easy access,in exchange for their contribution.This model is popular for startups and creative projects.●Equity(股权)Crowdfunding—Investors receive shares or equity in the business in exchange for their funding.This model is ideal for small businesses looking to raise substantial capital and is subject to specific regulations.●Debt Crowdfunding—Entrepreneurs borrow money from backers and agree to repay it with interest over time.This model is similar to a loan and is suitable for businesses with a clear repayment plan.Tips for a Successful Crowdfunding Campaign●Set clear goals:Define your funding goal,the purpose of the funds,and how you’ll use the money.●Persuasive story:Make an appealing and genuine story about your business.Explain why it matters and how backers’contributions will make a difference.●Engage your network:Mobilize your existing network of friends,family,and professional contacts to support your campaign.Their initial contributions can build momentum (动力).●Transparency:Be transparent and honest about your project’s progress and any challenges you encounter.Backers appreciate honesty.●Fulfill promise s:Once your campaign is successful,fulfill your promises to backers timely and communicate regularly.60.According to the passage,which of the following is accurate about crowdfunding?A.Reward-Based Crowdfunding is the most popular type of crowdfunding.B.Backers can get the same kinds of rewards in the three types of crowdfunding.C.Crowdfunding is a fundraising technique that relies on offline platforms.D.Debt Crowdfunding is fit for businesses with a specific repayment schedule.61.The4th tip“Transparency”probably means“________”.A.carefulnessB.perseveranceC.franknessD.optimism62.The owners of Exploding Kittens,a card game corporation established six years ago,plan toraise a large sum of capital to start a promotion campaign.They are highly recommended to ________.A.prefer Reward-Based Crowdfunding to Equity CrowdfundingB.draft an attractive story about the campaign based on real informationC.realize their promises to backers on time even if the campaign is a failurepare the initial support provided by different existing contacts(C)Hundreds of people die at sea every year due to ship and airplane accidents.Emergency teams have little time to rescue those in the water because the probability of finding a person alive falls dramatically after six hours.Beyond tides and challenging weather conditions,unsteady coastal currents often make search and rescue operations extremely difficult.New insight into coastal flows gained by an international research team led by George Haller, Professor of Nonlinear Dynamics at ETH Zurich,promises to enhance the search and rescue techniques currently in ing tools from dynamical systems theory and ocean data,the team has developed an algorithm(算法)to predict where objects and people floating in water will go.“Our work has a clear potential to save lives,”says Mattia Serra,the first author of a study recently published in Nature Communications.In today’s rescue operations at sea,complicated models of ocean dynamics and weather forecasting are used to predict the path of floating objects.For fast-changing coastal waters, however,such predictions are often inaccurate due to uncertain boundaries and missing data.As a result,a search may be launched in the wrong location,causing a loss of precious time.Haller’s research team obtained mathematical results predicting that objects floating on the ocean’s surface should gather along a few special curves(曲线)which they call TRansient Attracting Profiles(TRAPs).These curves can’t be seen with our eyes but can be tracked frominstant ocean surface current data using recent mathematical methods developed by the ETH team. This enables quick and precise planning of search paths that are less sensitive to uncertainties in the time and place of the accident.In cooperation with a team from MIT,the ETH team tested their new,TRAP-based search algorithm in two separate ocean experiments near Martha’s Vineyard,which is on the northeastern coast of the United States.Working from the same real-time data available to the Coast Guard,the team successfully identified TRAPs in the region in real-time.They found that buoys and manikins(浮标和人体模型)thrown in the water indeed quickly gathered along these emerging curves.“Of several competing approaches tested in this project,this was the only algorithm that consistently found the right location”,says Haller.“Our results are rapidly obtained,easy to interpret,and cheap to perform,”points out Serra. Haller stresses:“Our hope is that this method will become a standard part of the tool kit of coast guards everywhere.”63.In a search and rescue operation,________.A.the survival rate drops to almost zero after six hoursB.the use of dynamics leads to the wrong locationC.weather conditions are a determining factorD.changing currents present a challenge64.The main significance of the new algorithm is________.A.accurately predicting weather conditions during rescue operationsB.dependence on satellite technology to locate distressed individuals at seaC.cost-effective,efficient tracking of objects and individuals in coastal watersD.predicting the exact time and location of ocean accidents65.Paragraph5mainly talks about________.A.the collection of dataB.the testing of the algorithmC.the identification of the TRAPsD.the cooperation of two research teams66.Which of the following is the best title for the passage?A.How Mathematics Can Save Lives at SeaB.How Coastal Waters Affect Saving LivesC.Why Algorithms Are Popular in Rescue OperationsD.Why Success Rates of Rescue Operations Have FallenSection CDirections:Read the following passage.Fill in each blank with a proper sentence given in the box.Each sentence can be used only once.Note that there are two more sentences than you need.A.Such media doesn’t just entertain.B.You can easily pick out the differences among your siblings.C.As we journey through adulthood,it’s crucial to reflect on its impact.D.Media exposure during childhood impacts each child in distinct ways.E.Additionally,media have proven to have long-term effects on individuals.F.However,our mental and physical states may not be adequately equipped to handle it.Childhood Media Shaping FuturesMuch of the media we consume during our formative years shapes us into the people we are today.Reflect on a particular piece of media from our childhood—perhaps it’s the TV show we eagerly awaited every weekend during visits to our grandmother’s house.67It shapes our dreams and fears and even drives us to future careers.68Older children may have had a lot more restrictions,like TV shows,movies, and social media access.And because of these,they were able to be a child for longer compared to their siblings(兄弟姐妹).Children who have older siblings tend to show more mature tendencies and can appear to“grow up quicker”than other children their age.While they might have been restricted from social media accounts until a certain age,once given access,they tend to be more prepared.The media exposure of our generation has undoubtedly led to an increased maturation at younger ages.699Simply looking back at previous generations and the rate of consumption and processing of information that we experience every day,the effects of such are only beginning.As soon-to-be or current adults,we are already facing issues such as depression,anxiety,and delays in certain learning and social skills,just to name a few.Are we“more mature?”or are we overexposed and at risk for exceptional mental,physical,and emotional consequences?In conclusion,childhood media consumption significantly influences our lives.70Striking a balance between media exposure and mental well-being is essential for our growth in today’s media-rich world.IV.Summary WritingDirections:Read the following passage.Summarize the main idea and the main point(s)of the passage in no more e your own words as far as possible.Have You Got Success Amnesia?Have you heard yourself say“it was nothing really”when someone congratulates you on a job well done?Or have you drawn a blank when you are asked to make a list of what you have achieved?If so,you have suffered success amnesia.Failing to acknowledge your hard work is often a sign of success amnesia.It signals that there might be a gap between how others view your achievements and how you see them.People who have success amnesia often have a strong track record at work or get it sorted for family members.They are people who others would describe as successful and yet they find it difficult to acknowledge and own their results.They don’t hold their achievements in their memory bank.This particular type of memory loss robs them of the satisfaction and pleasure that can follow in achieving a goal.And,perhaps more importantly,it robs them of confidence. Confidence does not guarantee success,but it does increase the chance of success.Why not try some practical methods?Ask for feedback about the impact you’ve had and then listen carefully.Watch out for anything that you begin to tell yourself“It wasn’t that big a deal.”Try to absorb what you hear. You can also look back over the past6or12months,capture every success you can think of, whether large or small,and write them down clearly.Purposefully acknowledging and admitting your achievements can help to bring them into more realistic focus.Besides,be mindful that you have a tendency to forget or minimize your achievements.A sticky note on your laptop screen might help:my strengths and achievements are bigger than they appear to me.V.TranslationDirections:Translate the following sentences into English,using the words given in the brackets.72.这种新产品防水耐高温,卖得很好。
2022学年第二学期九年级学业质量调研综合测试试卷物理部分一、选择题(本大题共6题,每题2分,共12分。
每题只有一个正确选项)1.下列粒子中,带负电的是()A .电子B .中子C .质子D .原子2.小闵在观看卡塔尔世界杯足球赛时,听到某解说员说道:“哪有什么无心插柳,都是努力后的水到渠成。
”小闵辨别出是贺炜解说员说的,主要是依据声音的()A .响度B .音调C .音色D .频率3.下列现象中,能说明分子做无规则运动的是()A .花香四溢B .浓烟滚滚C .柳絮纷飞D .尘土飞扬4.用下列轻质简单机械缓慢提起同一物体,不计摩擦、机械自重及绳的重,用力最小的是()A .B .C .D .5.物体通过凸透镜在光屏上成放大的像,像距为30厘米、像高为2厘米。
移动该物体使物距变为40厘米,关于此时所成像高度的判断正确的是()A .一定大于2厘米B .可能小于2厘米C .一定等于2厘米D .一定小于2厘米6.实心均匀正方体甲、乙叠放后放在水平地面上,如图(a )所示,已知甲、乙边长关系为0.5l l =甲乙。
将它们上下翻转后仍放在水平地面上,如图(b )所示。
若翻转前后,上方正方体对下方正方体的压强均为p ,则下列关于甲、乙密度ρ甲、ρ乙的大小关系和乙对地面压强p 乙大小的判断,正确的是()A .2ρρ=甲乙,2p p =乙B .2ρρ=甲乙,0.5p p =乙C .8ρρ=甲乙,2p p=乙D .8ρρ=甲乙,0.5p p=乙二、填空题(本大题共7题,共23分)7.上海地区家庭电路中,空调正常工作的电压为___________伏,工作时消耗的电能可用___________测量,它的计量单位是___________。
8.小王用力将下落的排球垫起,排球向上飞出,这主要表明力可以改变物体的___________,排球上升过程中,其重力势能___________,惯性___________。
9.在10秒内通过某导体横截面的电荷量为3库,导体两端的电压为9伏,则通过该导体的电流为___________安,这段时间内电流所做的功为___________焦。
2023学年第二学期初三年级学业质量调研道德与法治试卷(考试时间40分钟,满分30分,全开卷)考生注意:请将答案写在答题纸上一、综合理解题(本题共12分)发展新质生产力小聪同学最近迷上了“新质生产力”,我们跟着他一起学习吧。
1.请补充小聪漏写的内容:。
(2分)3.小聪立志从事与材料中划线部分相关的研究,需做哪些准备?请提两条具体建议。
(4分)二、时政探究题(本题共10分)留言板架起社情民意“直通车”人民网“领导留言板”是为中央部委和地方各级党委政府主要负责同志搭建的网上群众工作平台,群众可直接留言发表意见建议。
为了解相关情况,晓兴查阅到以下资料:补充:2023年回复总量为67.8万件,接近留言总量的85.1%。
4.图2-1反映什么现象?从中可以悟出什么道理?(4分)5.晓兴还了解到,2006年以来,超350万件留言通过“领导留言板”得到各地区各部门各单位的回复办理;120万件“人民建议”被转化为实实在在的政策惠及民生……群众好评量和满意度不断提升。
结合材料,综合运用所学分析群众好评量和满意度不断提升的原因。
(6分)三、案例分析题(本题共8分)共建绿色“一带一路”共建“一带一路”倡议提出10年多来,在各方共同努力下,“绿色丝绸之路”建设成果丰硕。
我国大力推进自身生态文明建设的同时,带动沿线国家提升生态环境治理能力,为应对气候变化作出了巨大贡献。
我国先后发布《关于推进绿色“一带一路”建设的指导意见》等文件;为多个国家培训30 00多人次的环境管理人员和专家学者;扎实推进绿色基建、能源、交通、金融等领域合作;在沿线国家传播菌草技术,使之成为“治沙草”“致富草”……帮助“一带一路”共建国家走向一条“绿富同兴”的“幸福路”。
6.结合案例,运用所学阐述我国是如何共建“绿富同兴”的“一带一路”的。
公众号:奥孚升学奥孚升学公众号:奥孚升学众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚公众号:奥孚升学公众号:公众号:奥孚升学奥孚升学公众号:奥孚升学众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚公众号:奥孚升学公众号:公众号:奥孚升学奥孚升学公众号:奥孚升学众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚公众号:奥孚升学公众号:公众号:奥孚升学奥孚升学公众号:奥孚升学众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚公众号:奥孚升学公众号:公众号:奥孚升学奥孚升学公众号:奥孚升学众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚公众号:奥孚升学公众号:公众号:奥孚升学奥孚升学公众号:奥孚升学众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚升学公众号:奥孚公众号:奥孚升学公众号:奥孚升学2024闵行区初三二模数学卷参考答案感谢Eric同学分享!1-6BCCDDA7.28.39.2<x<310.16向量a+12向量b11.x=-112.m>113.5x+2y=192x+5y=16(方程组前面要加大括号)14.90°15.216.2/317.三分之根号二18.25/719.3+√220.化简:a-1/a+1求值:3+2√221.⑴证明两组对边互相平行⑵证明△CDE≌△DGB22.⑴y1=2x-6y2=-x+33⑵18-20时自西向东8-9时自东向西23⑴AB=BC=CD=DE=EF=FA∠A=∠B=∠C=∠D=∠E=∠F⑵AB=√(10-2√5)(二重根)24.(1)⑵D(3/2,0)Q(-5/2,-2)⑶-5/4<t<0t<-525.⑴①∠ABO=45°②证明略⑵。
The Value of Perseverance in OvercomingChallengesIn the journey of life, challenges and obstacles are inevitable, especially for junior high school students preparing for their second mock examination in Minhang District, Shanghai, in 2024. This critical phase marks a pivotal moment in their academic careers, and the significance of perseverance in overcoming these challenges cannot be overstated.Perseverance is the key to success in overcoming challenges. It is the resilience and determination that push us to keep going when faced with difficulties. For junior high school students, the second mock examination serves as a gauge of their progress and preparation for the upcoming senior high school entrance examination. The pressure to excel and the fear of failure can be overwhelming, but it is perseverance that helps them stay focused and motivated.In my personal experience, I have witnessed the transformation of my classmates who displayed perseverance in the face of challenges. One such classmate, let's callher Li Hua, was initially struggling with her studies. She faced difficulties in understanding complex concepts and was often overwhelmed by the amount of content to cover. However, instead of giving up, Li Hua persevered and dedicated herself to improving her academic performance. She sought help from teachers, classmates, and online resources, and put in extra hours of study. Gradually, her efforts began to pay off, and her grades improved significantly.The importance of perseverance extends beyond academic success. It builds character and instills a sense of accomplishment. The process of overcoming challenges teaches us valuable lessons about resilience, problem-solving, and the power of positive thinking. These skills are essential for success in all aspects of life, not just academically.Moreover, perseverance fosters a growth mindset. It encourages us to view challenges as opportunities for growth and learning rather than obstacles to overcome. This mindset helps us to embrace challenges with a positive attitude and to learn from our mistakes.As we approach the second mock examination in 2024, it is crucial for junior high school students to cultivate perseverance. They should remember that success does not come easily and requires dedication, hard work, and a refusal to quit. By persevering in the face of challenges, they can overcome their fears and doubts and achieve their academic goals.In conclusion, perseverance is a valuable trait that junior high school students should cultivate to overcome challenges and achieve success. It builds character, fosters a growth mindset, and instills a sense of accomplishment. As we prepare for the second mock examination in 2024, let us remember that perseverance is the key to overcoming obstacles and reaching our goals.**坚持克服挑战的价值**在人生的旅途中,挑战和障碍是不可避免的,尤其是对于2024年准备上海市闵行区初三第二次模拟考试的学生来说。
上海市中考物理二模试卷学校:__________ 姓名:__________ 班级:__________ 考号:__________注意事项:1.答题前填写好自己的姓名、班级、考号等信息2.请将答案正确填写在答题卡上一、单选题1.常州市城市生活垃圾焚烧发电厂将于2008年9月28日并网发电.该工程总投资5亿元,每天可焚烧垃圾7.5×105kg,发电1. 6 ×105kW·h,利用垃圾焚烧所产生的炉渣可制砖6万块.对于该工程的意义,下列说法错误的是()A.解决城市生活垃圾的处理难题,变废为宝B.高温消灭垃圾中的细菌、病毒,有利环保C.减少需要填埋的垃圾质量和体积,节约土地D.居民投放垃圾不用分类,轻松便捷2.关于热机的效率,下列说法中正确的是:()A.热机的效率可以等于1;B.燃料完全燃烧放出的热量不可能全部用来做功;C.减少热损失对提高热机效率无影响;D.设法利用废气的能量也不能提高热机效率.3.如图所示,是甲、乙两组拔河比赛的场景,不计绳重,下列说法错误的是 ....... ()A.比赛时,选体重大的运动员,能增大对地面的压力B.比赛时,运动员身体后倾、两腿弯曲,可以降低重心C.比赛时.拉力较大的一组最终获胜D.比赛时,受到地面摩擦力较大的一组最终获胜4.以下事例中,属于增大摩擦的是................................................................................... ()A.鞋底印有粗糙的花纹B.车轴中装有滚珠轴承C.机器转动部分加润滑油D.在行李箱上安装滚轮5.物理小组的同学想利用闪电和雷声的时间间隔计算闪电发生位置到他们的距离,以下是因位同学提出的不同方案,其中计算结果误差最小的应该是......................................... ()A.记录刚刚看到闪电至刚刚听到雷声的时间,再乘以声速B.记录刚刚看到闪电至雷声刚刚结束的时间贵再乘以声速C.由两位同学分别按选项A、B两种方法测量时间,求平均值后,再乘以声速D.由一位同学按照选项A的方法,多测几次对应不同闪电与雷声的时间间隔,求平均值后,再乘以声速6.在水平路面上,小车在520N的水平拉力作用下向东行驶,此时它受到的阻力为480N.那么小车所受的合力大小与方向是()A.1000N,向东B.1000N,向西C.40N,向东D.40N,向西7.科学家用仪器观察星系发出的光,可以看到它的光谱,如图给出了太阳的光谱.上世纪20年代,天文学家哈勃发现星系的光谱向长波方向偏移,称之为谱线“红移”.这一现象说明宇宙在膨胀,即别的星系与我们:()A.逐渐靠近; B.逐渐远离; C.距离不变; D.无法判断.8.以下哪种物理现象的发现和利用,实现了电能大规模生产,使人们从蒸汽时代进入电的时代 ........................................................................................................................................ ()A.电流通过导体发热B.电流的磁效应C.电磁感应现象D.通电线圈在磁场中会转动9.两根地热丝R1>R2,用来加热定量的水,下列接法中使水温升得最快的是()A.R1与R2并联 B.R1与R2串联C. R1单独接入电路 D. R2单独接入电路.10.小明观察了市场上的测重仪后,设计了如图四个电路(R是定值电阻,R1是滑动变阻器).可以测量人体重的电路是..................................................................................... ()11.图中标出了制成铅笔的几种材料,通常条件下属于导体的是 ............................. ()A.木材、橡皮B.石墨、金属C.木材、金属D.石墨、橡皮12.下列自然现象中,属于凝华的是()A.深秋的早晨,大雾弥漫B.冬天的早晨,霜打枝头C.春天,河里的冰雪消融D.夏天早晨,花草上附着露水二、填空题13.以下四幅图描绘的是杠杆在生活中的应用属于省力杠杆的是,属于费力杠杆的是(填相应的字母)14.(3分)列车上出售的食品常常放在如图所示的小推车上,若货物均匀摆在车内,当前轮遇到障碍物A时,售货员向下按扶把,这时手推车可以视为杠杆,支点是 (写出支点位置的字母);当后轮遇到障碍物A时,售货员向上提扶把,这时支点是。
2024-2025学年上海市闵行区九年级上学期期中英语试题1. Which of the following underlined parts is different in pronunciation?A.en e my B.r e spect C.op i nion D.cit i zen 2. Try to do one thing at ________ time, and do it well.A.a B.an C.the D./3. Ben’s new laptop weighs much lighter than ________. And it also costs less.A.mine B.me C.my D.myself 4. John is in charge of training new staff in his company ________ the time being.A.at B.by C.with D.for5. Although they have already got a gold medal, they try to win ________ one.A.other B.another C.the other D.others6. Your idea of having a picnic in the countryside this weekend sounds ________.A.beautifully B.softly C.lovely D.possibly 7. Belinda us ed to get up late, ________ she isn’t late for class any longer now.A.but B.so C.or D.and8. By the end of last year, they ________ over ten thousand homeless people.A.helps B.has helped C.will help D.had helped 9. To our surprise, the robot ________ communicate with us in our local language.A.can B.must C.should D.may10. Like all Greeks, she ________ the legend of Odysseus since childhood.A.knows B.knew C.has known D.will know 11. You’ll possibly make mistakes in the exam ________ you check the paper very carefully.A.unless B.if C.until D.after12. When he knocked at the door, I ________ my favourite comics.A.read B.was reading C.had read D.would read 13. —________ will the injured boy come back to school?—In two months.A.How soon B.How long C.How fast D.How often 14. Once he made a decision, nothing would make him ________ his mind.A.to change B.change C.changing D.changed15. Zhenqinwen, the Queen Wen, gained several________ followers soon after she won the tennis gold in the 2024 Summer Olympics in Paris.A.million B.millions of C.millions D.million of 16. Pictures and sounds in the film enable us________ the novel better.A.understand B.understanding C.understood D.to understand 17. ________ horrible weather it was in Shanghai this summer!A.How B.What a C.What an D.What18. He showed great interest and spent much time________ traditional Chinese culture.A.learn B.to learn C.learning D.learned19. — Ellen, I could type the letter for you if you want.— ________.A.OK. I’ll take your advice. B.You are welcome.C.Thank you, but I can manage D.That sounds interesting.20. —Sorry, Jimmy. I’ve broken your vase.—________A.I’m afraid you can’t.B.Have another try. C.How could youdo that?D.Of course not.Complete the following passage with the words or phrases in the box. Each can only be used once (将下列单词或词组填入空格。
闵行区2013-2014学年度第二学期九年级质量调研考试(二模)英语试卷(满分150分,完卷时间100分钟)考生注意:本卷有7大题,共94小题。
试题均采用连续编号,所有答案务必按照规定在答题卡上完成,做在试卷上不给分。
Part 1 Listening (第一部分听力)I. Listening comprehension (听力理解) (共30 分)A. Listen and choose the right picture. (根据你听到的内容,选出相应的图片) (6 分)1._____2.______3._______4.______5.______6.__________B. Listen to the dialogue and choose the best answer to the question you hear.(根据你听到的对话和问题,选出最恰当的答案):(8分)7. A) Canada. B) Australia. C) England. D) China.8. A) By bike. B) By underground. C) By bus. D) By car.9. A) The yellow one. B) The blue one. C) The brown one. D) The red one.10. A) Because she had a long walk. B) Because she was ill.C) Because she slept too late. D) Because she worked a lot.11. A) Two days. B) Three days. C) Five days. D) Ten days.12. A) In a supermarket. B) At school. C) In a restaurant. D) At home.13. A) Playing the guitar. B) Going joggi ng.C) Their hobbies. D) Their work.14. A) Move to a new flat right now. B) Go and join the people in the office.C) Find more people to help with the move. D) Move to a new place at free time.C.Listen to the passage and tell whether the following statements are true or false. (判断下列句子是否符合你听到的短文内容,符合的用“T”表示,不符合的用“F”表示): (6分)15. Richard and his friends went on a picnic in a village this summer.16. They drew pictures, cooked food and climbed a hill in the morning.17. The girl picked flowers and the boys looked for some fruits in the forest.18. Richard succeeded in catching the beautiful bird he saw in the forest at last.19. When Richard was trying to find his way back, he saw a farmer growing vegetables.20. From the passage we know the farmer was unhappy to hear Richard’s words.D. Listen to the passage and fill in the blanks. (听短文填空,完成下列内容。
上海市闵行区中考二模数 学 试 卷(考试时间100分钟,满分150分)考生注意:1.本试卷含三个大题,共25题.2.答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答 题一律无效.3.除第一、二大题外,其余各题如无特别说明,都必须在答题纸的相应位置上写出证 明或计算的主要步骤.一、选择题:(本大题共6题,每题4分,满分24分)【下列各题的四个选项中,有且只有一个选项是正确的,请选择正确选项的代号并填涂在答题纸的相应位置上】 1.如果单项式13a xy +-与212b x y 是同类项,那么a 、b 的值分别为(A )1a =,3b =; (B )1a =,2b =; (C )2a =,3b =;(D )2a =,2b =.2.如果点P (a ,b )在第四象限,那么点Q (-a ,b -4)所在的象限是 (A )第一象限; (B )第二象限; (C )第三象限; (D )第四象限.3.3月14日,“玉兔号”月球车成功在距地球约384400公里远的月球上自主唤醒,将384400保留2个有效数字表示为学校_____________________ 班级__________ 准考证号_________ 姓名______________ …………………………密○………………………………………封○………………………………………○线…………………………(A)380000;(B)3.8×105;(C)38×104;(D)3.844×105.4.某商场一天中售出李宁运动鞋11双,其中各种尺码的鞋的销售量如下表所示,鞋的尺码(单位:c m)23.5 24 24.5 25 26销售量(单位:双) 1 2 2 5 1 那么这11(A)25,24.5;(B)24.5,25;(C)26,25;(D)25,25.5.下列四个命题中真命题是(A)对角线互相垂直平分的四边形是正方形;(B)对角线垂直且相等的四边形是菱形;(C)对角线相等且互相平分的四边形是矩形;(D)四边都相等的四边形是正方形.6.如图,在平地上种植树木时,要求株距(相邻两树间的水平距离)为4m.如果在坡比为4i=的山坡上种树,也要求株距为4m,1:(第6题图)3那么相邻两树间的坡面距离为(A)5m;(B)6m;(C)7m;(D)8m.二、填空题:(本大题共12题,每题4分,满分48分)【请将结果直接填入答题纸的相应位置上】78=▲.8.在实数范围内分解因式:241x x-+=▲.9.关于x的方程2+-=有实数根,那么实数m的取值范围是▲.x x m23010.已知函数0(1)()3x f x x -=-,那么(1)f -= ▲ .11.如果反比例函数的图象过点(-1,2),那么它在每个象限内y 随x 的增大而 ▲ .12.把函数22y x =的图象向右平移3个单位,再向下平移2个单位,得到的二次函数解析式是▲ .13.一个骰子六个面上的数字分别为1、2、3、4、5、6,投掷一次,向上的一面是合数的概率是 ▲ . 14.已知:233m a b =-,1124n b a =+,则4m n -= ▲ . 15.如图,直线AB ∥CD ∥EF ,那么∠α+∠β-∠γ= ▲ 度. 16.如图,已知DE ∥BC ,且EF ︰BF =3︰4,那么AE ︰AC = ▲ .17.如图,在Rt △ABC 中,∠C = 90°,AC=8,BC=6,两等圆⊙A 、⊙B 外切,那么图中两个扇形(即阴影部分)的面积之和为 ▲ .(保留π)C BA(第17题图))(第16题图)(第15题图)18.如图,已知△ACB 与△DEF 是两个全等的直角三角形,量得它们的斜边长为10cm ,较小锐角为30°,将这两个三角形摆成如图所示的形状,使点B 、C 、F 、D 在同一条直线上,且点C 与点F 重合,将△ACB 绕点C 顺时针方向旋转,使得点E 在AB 边上,AC 交DE 于点G ,那么线段FG 的长为 ▲ cm (保留根号).三、解答题:(本大题共7题,满分78分) 19.(本题满分10分)计算:12322cos 45|81|-----+.20.(本题满分10分)解方程组:113,231 1.2x x y x x y⎧+=⎪-⎪⎨⎪-=⎪-⎩21.(本题共2小题,每小题5分,满分10分)已知:如图,在以O 为圆心的两个同心圆中, 小圆的半径长为4,大圆的弦AB 与小圆交于C 、 D 两点,且AC=CD ,∠COD = 60°.AEC (F )B(第18题图))EABC(第21题图)DO求:(1)求大圆半径的长;(2)如果大圆的弦AE长为∠AEO 的余切. 并直接判断弦AE 与小圆的位置关系.22.(本题共2小题,第(1)小题6分,第(2)小题4分,满分10分)某校九年级二班为开展“迎五一劳动最光荣”的主题班会活动,派小明和小丽两位同学去学校附近的超市购买钢笔作为奖品.已知该超市的宝克牌钢笔每支8元,英雄牌钢笔每支4.8元,他们要购买这两种笔共40支.小明和小丽根据主题班会活动的设奖情况,决定所购买的宝克牌钢笔的数量要少于英雄牌钢笔的数量的12,但又不少于英雄牌钢笔的数量的14,如果他们买了宝克牌钢笔x 支,买这两种笔共花了y 元.(1)请写出y (元)关于x (支)的函数关系式,并求出自变量x 的取值范围;(2)请帮助他们计算一下,这两种笔各购买多少支时,所花的钱最少,此时花了多少元?23.(本题共2小题,每小题6分,满分12分)已知:如图,四边形ABCD 是平行四边形,分别以AB 、AD 为腰作等腰三角形△ABF 和等腰三角形△ADE ,且顶角∠BAF=∠DAE ,联结BD 、EF 相交于点G ,BD 与AF 相交于点H .ABDCEF(第23题图)GH(1)求证:BD=EF;(2)当线段FG、GH和GB满足怎样的数量关系时,四边形ABCD是菱形,并加以证明.24.(本题共2题,每小题6,满分12分)已知:如图,把两个全等的Rt△AOB和Rt△COD分别置于平面直角坐标系中,使直角边OB、OD在x轴上.已知点A(1,2),过A、C两点的直线分别交x轴、y轴于点E、F.抛物线2=++y ax bx c 经过O、A、C三点.(1)求该抛物线的表达式,并写出该抛物线的对称轴和顶点坐标;(2)点P为线段OC上一个动点,过点P作y轴的平行线交抛物线于点M,交x轴于点N,问是否存在这(第24题图)样的点P,使得四边形ABPM为等腰梯形?若存在,求出此时点P的坐标;若不存在,请说明理由.25.(本题共3小题,第(1)小题4分,第(2)小题6分,第(3)小题4分,满分14分)已知:如图①,△ABC 中,AI 、BI 分别平分∠BAC 、∠ABC .CE 是△ABC 的外角∠ACD 的平分线,交BI 延长线于E ,联结CI .(1)设∠BAC=2α.如果用α表示∠BIC 和∠E ,那么∠BIC= ,∠E= ;(2)如果AB=1,且△ABC 与△ICE 相似时,求线段AC 的长;(3)如图②,延长AI 交EC 延长线于F ,如果∠α=30°,sin ∠F=35,设BC=m ,试用m 的代数式表示BE .(第25题图②)FABCDEI(第25题图①)ABCDEI闵行区2013学年第二学期九年级质量调研考试数学试卷参考答案及评分标准一、选择题:(本大题共6题,每题4分,满分24分) 1.A ; 2.C ; 3.B ; 4.D ; 5.C ; 6.A . 二、填空题:(本大题共12题,每题4分,满分48分)7. 8.(22x x ---; 9.m ≥98-; 10.14-; 11.增大;12.22(3)2y x =--; 13.13; 14.823a b -; 15.180; 16.3︰4; 17.254π;18三、解答题:(本大题共7题,满分78分)19.解:原式1114=-+…………………………………(2分+2分+2分+2分)14=-.…………………………………………………………………(2分)20.解:设1u x =,12v x y =-,则原方程组可化为331u v u v +=⎧⎨-=⎩.……………………(2分)解这个方程组,得12uv=⎧⎨=⎩.………………………………………………(2分)于是,得11122xx y⎧=⎪⎪⎨⎪=⎪-⎩即1122xx y=⎧⎪⎨-=⎪⎩.……………………………………(2分)解方程组得132xy=⎧⎪⎨=⎪⎩.………………………………………………………(2分)经检验132xy=⎧⎪⎨=⎪⎩是原方程组的解.……………………………………………(1分)所以,原方程组的解是132xy=⎧⎪⎨=⎪⎩……………………………………………(1分)21.解:(1)过O作OF⊥CD,垂足为F,联结OA.∵ OC = OD = 4,∠COD = 60°,∴ OC = OD = CD = 4.又∵ AC=CD,∴ AC = CD= 4.………………………………………(1分)∵ OF⊥CD,且OF过圆心,CD= 4 ,∴ CF = FD = 2.∴ AF = 6.…………………………………………(1分)在Rt△COF中,222CO OF CF=+,∴OF = 1分)在Rt△AOF中,222AO OF AF=+,∴AO = .………………(1分)即:大圆半径的长为1分)(2)过O作OG⊥AE,垂足为G.∵ OG⊥AE,且OG过圆心,AE =∴AG = EG= 1分)在Rt△EOG中,222EO EG OG=+,∵OE = ∴ OG = 4.……………………………………………(1分)在Rt△EOG中,cot4EGAEOOG∠===.∴cot AEO∠=2分)答:弦AE与小圆相切.………………………………………………(1分)22.解:(1)根据题意,得8 4.8(40) 3.2192y x x x=⋅+-=+.…………………(3分)根据题意,得定义域为1(40)21(40)4x xx x⎧<-⎪⎪⎨⎪≥-⎪⎩.………………………………(1分)解得,定义域为8≤x <403的整数.…………………………(1分+1分)(2)由于一次函数 3.2192y x=+的k>0.所以y随x的增大而增大.因此,当x=8时花的钱最少.…………………………………………(2分)4032x-=, 3.28192217.6y=⨯+=.………………………………(1分)答:当购买英雄牌钢笔32支,宝克牌钢笔8支时,所花的钱最少,此时花了217.6元.………………………………………………(1分)23.(1)证明:∵∠BAF=∠DAE,∴∠BAF+∠FAD=∠DAE +∠FAD,即∠BAD=∠FAE.………(1分)在△BAD和△FAE中∵ AB=AF ,∠BAD=∠FAE ,AD=AE ,……………………………(3分)∴△BAD ≌ △FAE (SAS ).……………………………………(1分)∴ BD = EF .…………………………………………………………(1分)(2)当线段满足2FG GH GB =⋅时,四边形ABCD 是菱形.…………………(1分)证明:∵2FG GH GB =⋅,∴FG GH BG FG=. 又∵∠BGF=∠FGB , ∴△GHF ∽ △GFB .∴ ∠EFA=∠FBD .………………………(1分)∵△BAD ≌ △FAE , ∴ ∠EFA=∠ABD .∴ ∠FBD =∠ABD .…………………………………………………(1分)∵ 四边形ABCD 是平行四边形,∴ AD // BC .∴ ∠ADB=∠FBD .∴ ∠ADB=∠ABD .…………………………………………………(1分)∴ AB=AD .……………………………………………………………(1分) 又∵ 四边形ABCD 是平行四边形,∴ 四边形ABCD 是菱形.…………………………………………(1分)24.解:(1)∵ 抛物线2y ax bx c =++经过点O 、A 、C ,可得c = 0,…………(1分)∴2421a b a b +=⎧⎨+=⎩,解得32a =-,72b =;………………………………(2分) ∴ 抛物线解析式为23722y x x =-+.…………………………………(1分) 对称轴是直线76x =…………………………………………………(1分) 顶点坐标为(76,4924)……………………………………………(1分) (2)设点P 的横坐标为t ,∵PN ∥CD ,∴ △OPN ∽ △OCD ,可得PN=2t ,∴P (t ,2t ).……(1分) ∵点M 在抛物线上,∴M (t ,23722t t -+).…………(1分) 如解答图,过M 点作MG ⊥AB 于G ,过P 点作PH ⊥AB 于H ,AG = y A -y M = 2-(23722t t -+)=237222t t -++,BH = PN =2t .…(1分) 当AG=BH 时,四边形ABPM 为等腰梯形, ∴2372222t t t -++=,……………………………………………………(1分) 化简得3t 2-8t + 4=0,解得t 1=2(不合题意,舍去),t 2=23,………(1分) ∴点P 的坐标为(23,13). ∴存在点P (23,13),使得四边形ABPM 为等腰梯形.……………(1分)25.解:(1)∠BIC = 90°+α,…………………………………………………(2分)∠E = α.…………………………………………………………(2分)(2)由题意易证得△ICE 是直角三角形,且∠E = α.当△ABC ∽△ICE 时,可得△ABC 是直角三角形,有下列三种情况:①当∠ABC = 90° 时,∵∠BAC = 2α,∠E = α;∴ 只能∠E = ∠BCA ,可得∠BAC =2∠BCA .∴ ∠BAC = 60°,∠BCA = 30°.∴ AC =2 AB .∵ AB = 1 ,∴ AC = 2.…………………(2分)②当∠BCA = 90° 时,∵∠BAC = 2α,∠E = α;∴ 只能∠E = ∠ABC ,可得∠BAC =2∠ABC .∴ ∠BAC = 60°,∠ABC = 30°.∴ AB =2 AC .∵ AB = 1 ,∴ AC = 12.………………(2分) ③当∠BAC = 90° 时,∵∠BAC = 2α,∠E = α;∴∠E = ∠BAI = ∠CAI =45°.∴△ABC 是等腰直角三角形.即 AC = AB .∵ AB = 1 ,∴ AC = 1.…………………(2分)∴综上所述,当△ABC ∽△ICE 时,线段AC 的长为1或2或12. (3)∵∠E = ∠CAI ,由三角形内角和可得 ∠AIE = ∠ACE .∴ ∠AIB = ∠ACF .又∵∠BAI = ∠CAI , ∴ ∠ABI = ∠F .又∵BI 平分∠ABC , ∴ ∠ABI = ∠F =∠EBC .又∵∠E 是公共角, ∴ △EBC ∽△EFI .…………………………(2分)在Rt △ICF 中,sin ∠F=35,设IC = 3k ,那么CF = 4k ,IF = 5k . 在Rt △ICE 中,∠E =30°,设IC = 3k ,那么CE = ,IE = 6k .∵△EBC ∽△EFI .∴BC IF BE FE ==又∵BC=m , ∴ BE =.………………………………(2分)。
2024年上海闵行区初三年级第二学期学业质量调研语文试卷(考试时间100分钟,满分150分)考生注意:1.本试卷含四个大题,共22题。
答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答题一律无效。
一、古诗文(35分)(一)默写与运用(13分)1.念天地之悠悠,__________________!(陈子昂《登幽州台歌》)2.__________________,留取丹心照汗青。
(文天祥《过零丁洋》)3.锦帽貂裘,__________________。
(苏轼《江城子·密州出猎》)4.面对难题,我们有时会在反复尝试中自我怀疑,但再坚持一会儿,或许就能如《游山西村》中所言,迎来“__________________,__________________”的那一刻。
(二)阅读下面文言文,完成第5—9题(22分)【甲】初,权谓吕蒙曰:“卿今.当涂掌事,不可不学!”蒙辞以军中多务。
权曰:“孤岂欲卿治经为博士邪!但当涉猎,见往事耳。
卿言多务,孰若孤?孤常读书,自以为大有所益。
”蒙乃始就学。
及鲁肃过寻阳,与蒙论议,大惊曰:“卿今者才略,非复吴下阿蒙!”蒙曰:“士别三日,即更刮目相待,大兄何见事之晚乎!”肃遂拜蒙母,结友而别。
【乙】鲁哀公问于孔子曰:“当今.之时,君子谁贤?”对曰:“卫灵公。
臣观于朝廷。
灵公之弟曰公子渠牟,其知足以治千乘之国,其信足以守之,而灵公爱之;又有士曰王林,国有贤人必进而任之,无不达也;不能达,退而与分其禄,而灵公尊之;又有士曰庆足,国有大事,则进而治之,无不济也,而灵公说之;史①去卫,灵公邸舍②三月,琴瑟不御③,待史之入也而后入。
臣是以知其贤也。
”【注释】①史:史䲡,卫国大夫,以正直闻名于世。
②邸舍:客栈。
③御:用,古代君王所用称“御用”。
你和同学们正在开展“古代国家治理之道”主题探究活动,请结合上述材料,完成下面任务。
【第一步:阅读理解】5.论朝代,以下第一个“今”指_______时期,第二个“今”指_______时期。
闵行区2011学年第二学期九年级质量调研考试数 学 试 卷(考试时间100分钟,满分150分)考生注意:1.本试卷含三个大题,共25题.2.答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答 题一律无效.3.除第一、二大题外,其余各题如无特别说明,都必须在答题纸的相应位置上写出证 明或计算的主要步骤.一、选择题:(本大题共6题,每题4分,满分24分)【下列各题的四个选项中,有且只有一个选项是正确的,请选择正确选项的代号并填涂在答题纸的相应位置上】 1.下列计算正确的是 (A )236a a a ⋅=; (B )22()2a a a +=; (C )1242a a a ÷=; (D )236()a a =. 2.已知:a 、b 、c 为任意实数,且a > b ,那么下列结论一定正确的是(A )a c b c ->-; (B )a c b c -⋅<-⋅; (C )a c b c ⋅>⋅;(D )11a b<. 3.点P (-1,3)关于原点中心对称的点的坐标是(A )(-1,-3); (B )(1,-3); (C )(1,3); (D )(3,-1). 4.如果一组数据1a ,2a ,…,n a 的方差20s =,那么下列结论一定正确的是 (A )这组数据的平均数0x =; (B )12n a a a === ; (C )120n a a a ==== ; (D )12n a a a <<< .5.在四边形ABCD 中,对角线AC ⊥BD ,那么依次连结四边形ABCD 各边中点所得的四边形一定是(A )菱形; (B )矩形; (C )正方形;(D )平行四边形.6.一个正多边形绕它的中心旋转36°后,就与原正多边形第一次重合,那么这个正多边形(A )是轴对称图形,但不是中心对称图形; (B )是中心对称图形,但不是轴对称图形; (C )既是轴对称图形,又是中心对称图形; (D )既不是轴对称图形,也不是中心对称图形.学校_____________________ 班级__________ 准考证号_________ 姓名______________ …………………………密○………………………………………封○………………………………………○线…………………………二、填空题:(本大题共12题,每题4分,满分48分) 【请将结果直接填入答题纸的相应位置上】 7= ▲ .8.在实数范围内分解因式:324x x -= ▲ . 9.不等式13(1)x x ->+的解集是 ▲ .10.已知x = 1是一元二次方程230a x b x ++=的一个实数根,那么a +b = ▲ . 11.已知函数()f x =,那么(9)f = ▲ . 12.已知一次函数y k x b =+的图像经过点A (1,-5),且与直线32y x =-+平行,那么该一次函数的解析式为 ▲ .13.二次函数223y x x =-+的图像在对称轴的左侧是 ▲ .(填“上升”或“下降”) 14.从1、2、3、4、5、6、7、8这八个数中,任意抽取一个数, 那么抽得的数是素数的概率是 ▲ .15.如图,在△ABC 中,AB AC -=▲ .16.已知:在△ABC 中,点D 、E 分别在边AB 、BC 上,DE // AC ,12AD DB =,DE = 4,那么边AC 的长为 ▲ .17.已知⊙O 1与⊙O 2相交于A 、B 两点,如果⊙O 1、⊙O 2的半径分别为10厘米和17厘米,公共弦AB 的长为16厘米,那么这两圆的圆心距O 1O 2的长为 ▲ 厘米.18.如图,把一个面积为1的正方形等分成两个面积为12的矩形,接着把其中一个面积为12的矩形等分成两个面积为14的矩形,再把其中一个面积为14的矩形等分成两个面积为18的矩形,如此进行下去,试利用图形所揭示的规律计算: 111111111248163264128256++++++++= ▲ .三、解答题:(本大题共7题,满分78分) 19.(本题满分10分)先化简,再求值:11)1112(+÷+--a a a,其中1a =. 20.(本题满分10分)解方程组:2225,70.x y x y x +=⎧⎨-++=⎩B(第15题图)(第18题图)21.(本题共2小题,每小题5分,满分10分)已知:如图,在Rt △ABC 中,∠ACB = 90°,AD 平分∠BAC ,DE ⊥AB ,垂足为点E ,AE = 16,4sin 5B ∠=. 求:(1)BC 的长;(2)求∠ADE 的正切值.22.(本题共3小题,第(1)、(2)每小题3分,第(3)小题4分,满分10分)某研究性学习小组,为了了解本校九年级学生一天中做家庭作业所用的大致时间(时间以整数记.单位:分钟),对该年级学生做了抽样调查,并把调查得到的所有数据(时间)进行整理,分成五个时间段,绘制成统计图(如图所示),请结合统计图中提供的信息,回答下列问题: (1)这个研究性学习小组所抽取样本的容量是多少?(2)在被调查的学生中,一天做家庭作业所用的大致时间超过150分钟(不包括150分钟)的人数占被调查学生总人数的百分之几? (3)如果该校九年级学生共有200名,那么估计该校九年级学生一天做家庭作业所用时间不超过120分钟的学生约有多少人?23.(本题共2小题,每小题6分,满分12分) 已知:如图,在梯形ABCD 中,AD // BC ,点E 、F 在边BC 上,DE // AB ,A F // CD ,且四边形AEFD 是平行四边形.(1)试判断线段AD 与BC 的长度之间有怎样的数量关系?并证明你的结论;(2)现有三个论断:①AD = AB ;②∠B +∠C = 90°;③∠B = 2∠C .请从上述三个论断中选择一个论断作为条件,证明四边形AEFD 是菱形.AB C E(第21题图)D ABDCEF(第23题图)(第22题图)24.(本题共3小题,每小题4分,满分12分)已知:如图,抛物线2y x b x c =-++与x 轴的负半轴相交于点A ,与y 轴相交于点B (0,3),且∠OAB 的余切值为13.(1)求该抛物线的表达式,并写出顶点D 的坐标; (2)设该抛物线的对称轴为直线l ,点B 关于直线l 的对称点为C ,BC 与直线l 相交于点E .点P 在直线l 上,如果点D 是△PBC 的重心,求点P 的坐标; (3)在(2)的条件下,将(1)所求得的抛物线沿y 轴向上或向下平移后顶点为点P ,写出平移后抛物线的表达式.点M 在平移后的抛物线上,且△MPD的面积等于△BPD 的面积的2倍,求点M 的坐标.25.(本题共3小题,第(1)小题4分,第(2)、(3)小题每小题5分,满分14分)已知:如图,AB ⊥BC ,AD // BC , AB = 3,AD = 2.点P 在线段AB 上,联结PD ,过点D 作PD 的垂线,与BC 相交于点C .设线段AP 的长为x . (1)当AP = AD 时,求线段PC 的长;(2)设△PDC 的面积为y ,求y 关于x 的函数解析式,并写出函数的定义域; (3)当△APD ∽△DPC 时,求线段BC 的长.………………………………………………………………………………………………………………………………………………………密 封 线 内 不 准 答 题ABC DP (第25题图)ABCD(备用图)(第24题图)。
闵行区2013学年第二学期九年级质量调研考试理 化 试 卷(满分150分,考试时间100分钟)化学部分考生注意:1.答题前,考生务必在答题卷上用黑色字迹的签字笔或钢笔填写自己的学校、班级、姓名及学号。
2.答案必须写在答题卷的相应位置上,写在试卷上一律不给分。
3.请注意题号顺序,所写内容不得超出黑色边框,超出部分视为无效。
4.选择题用2B 铅笔填涂,修改时用橡皮擦干净后,重新填涂所选项。
每题的解答都不能超出矩形答题框,选择题的正确填涂为:▅。
5.填空题和简答题必须用黑色字迹的签字笔或钢笔书写,作图题还可使用2B 铅笔。
相对原子质量:H-1 C-12 N-14 O-16 Na-23 Al-27 Ca-40 Cu-64 Zn-65 六、单项选择题(共20分) 27.下列属于化学变化的是A .蔗糖溶解B .滴水成冰C .花香四溢D .铁器生锈 28.下列属于纯净物的是A .液态氧B .加碘盐C .酸牛奶D .不锈钢 29.地壳里含量最多的金属元素是A .氧B .硅C .铝D .铁30.金属钒(V)被誉为“合金的维生素”,可由V 2O 5冶炼得到。
V 2O 5中氧元素的化合价为-2,则钒元素的化合价为 A .+2 B .-2 C .+5 D .-5 31.下列物质的性质中,属于物理性质的是A .物质挥发性B .溶液酸碱性C .物质可燃性D .金属活动性 3233.单晶硅是制作电子集成电路的基础材料。
工业上通过以下反应将自然界的二氧化硅(SiO 2)转化为硅:2C +SiO 2−−→−高温Si + 2CO ↑ ,下列分析正确的是 A .二氧化硅发生了氧化反应B .碳发生了还原反应C .一氧化碳作还原剂D .二氧化硅作氧化剂34学校_____________________ 班级__________ 姓名_________ 准考证号______________………………………密○………………………………………封○………………………………………○线…………………………甲乙丙氢原子碳原子氧原子根据上表可知,在正常情况下A.人体的尿液一定呈酸性 B.人体的血液一定呈碱性C.人体的胃液能使紫色石蕊试液变蓝色 D.pH试纸可精确测得以上体液的pH 35.下列实验操作或现象的描述正确的是A.将50.0mL酒精与50.0mL蒸馏水混合,所得溶液体积小于100.0mLB.打开浓盐酸的瓶盖,在瓶口会看到白烟C.“粗盐提纯”实验中,过滤时将悬浊液直接倒入漏斗D.硫在空气中燃烧发出明亮蓝紫色火焰,生成刺激性气味气体36.下列实验基本操作中,正确的是37.根据物质的组成,小明将部分物质分为甲、乙两类(如表所示).下列对分类结果判断正确的是A.甲为化合物,乙为单质B.甲为单质,乙为化合物C.甲为氧化物,乙为金属D.甲为金属r乙为氯化物38.下列化学方程式能正确表示所述内容的是A.铁丝在氧气中燃烧:4Fe+3O2 2Fe2O3B.实验室制备O2:H2O22MnO−−−→H2↑+O2↑C.盐酸除铁锈:Fe2O3+6HCl 2FeCl3+3H2OD.用氢氧化钠人也吸收二氧化硫:2NaOH+SO2 Na2SO4+H2O39.A.收集H2B.O2验满C.配制20%的Ca(OH)2溶液D.除去CO中的CO2 40.甲和乙反应可制备燃料丙,其微观示意图如下。
2024年上海市闵行区九年级中考二模物理试卷学校:___________姓名:___________班级:___________考号:___________一、单选题1.下列粒子中,带正电的是( )A .电子B .质子C .中子D .原子 2.下列单色光中,属于三原色光的是( )A .黄光B .绿光C .橙光D .紫光 3.四冲程内燃机工作时,将内能转化成机械能的冲程是( )A .吸气冲程B .压缩冲程C .做功冲程D .排气冲程4.大小相等的两个力1F 与2F 作用于物体上,能使物体处于平衡状态的是( ) A . B . C . D .5.将蜡烛、凸透镜、光屏放置于光具座上,光屏上呈现一个清晰的像,如图所示。
改变蜡烛的位置,移动光屏,直到光屏上再次呈现清晰的像,此时的物距u 、像距v 可能是( )A .16u =厘米 32v =厘米B .14u =厘米 28v =厘米C .32u =厘米 16v =厘米D .13u =厘米 43v =厘米 6.甲、乙两车分别从P 、Q 两点同时出发,沿直线PQ 运动,其s t -图像分别如图所示。
运动一段时间后甲、乙两车相距4米,又经过1秒后两车相距3米。
关于P 、Q 两点间的距离s 及两车运动方向的判断,正确的是( )A.s一定大于4米,两车相向运动B.s可能小于4米,两车相向运动C.s一定大于4米,两车同向运动D.s可能小于4米,两车同向运动二、填空题7.我国家庭电路的电压为伏,家用电器工作时消耗的电能用表来测量;远距离输电时,为了减少电能损耗,通常采用输电(选填“低压”或“高压”)。
8.2023年10月26日,长征二号F遥十七运载火箭在酒泉卫星发射中心成功发射。
火箭发射时发出巨大的轰鸣声,主要是指声音的大。
火箭向下喷出高温高压气体的同时火箭向上加速运动,这说明物体间力的作用是的。
以发射塔为参照物,火箭是的。
9.如图所示,运动员在滑行的冰壶前不断刷冰,使冰面的内能增加,这是通过的方式改变内能。
2023 学年第二学期初三年级学业质量调研英语试卷(满分140分,考试时间90分钟)考生注意:本卷有7大题,共84小题。
试题均采用连续编号,所有答案务必按照规定在答题纸上完成,做在试卷上不给分。
Part 1 Listening(第一部分听力)I. Listening Comprehension(听力理解)(本大题共20题,共25分)A. Listen and choose the right picture (根据你听到的内容,选出相应的图片)(5分)A B CD E F1. ________2. ________3. ________4. ________5. ________B. Listen to the dialogues and choose the best answer to the question you hear (根据你听到的对话和问题,选出最恰当的答案)(5分)6. A. Skating. B. Cycling. C. Swimming. D. Boating.7. A. In a museum. B. In a cinema. C. In a library. D. In a restaurant.8. A. By car. B. By plane. C. By train. D. By ship.9. A. The weather in Australia. B. The study trip in Australia.C. The activities in Australia.D. The friends in Australia.10. A. The 1,500-metre race isn't a good sport for Alex.B. Alex is afraid of running the 1,500-metre race.C. Practice helps Alex to achieve much progress.D. Alex never dreams to be a professional runner.C. Listen to the passage and tell whether the following statements are true or false (判断下列句子是否符合你听到的短文内容,符合的用“T ”表示,不符合的用“F ”表示)(5分)11. Steve & Kate's Camp has offered summer camps since 1989.12. Kids and parents must choose adventures through activities together.13. Every single one of the summer camps is open from 8 a. m. to 6 p. m.14. Three meals, including snacks, are provided in the camp every day.15. Steve & Kate's Camp is inviting parents to send kids to their summer camp.D. Listen to the passage and complete the following sentences (听短文,用听到的单词完成下列句子。
2022学年第二学期九年级学业质量调研语文试卷(练习时间100分钟,满分150分)1.本卷共23题。
2.答题时,学生务必按答题要求在答题纸规定的位置上作答,在本卷上答题一律无效。
一、文言文(35分)(一)默写(13分)1.枯藤老树昏鸦,,古道西风瘦马。
(《天净沙·秋思》)2. ,弓如霹雳弦惊。
(《破阵子·为陈同甫赋壮词以寄之》)3.莲之爱,?(《爱莲说》)4.如果你在登山途中赞叹大自然的景色秀丽宜人、山势高耸入云,可用《望岳》中的诗句:“,。
”(二)阅读下面的诗文,完成第5-10题(22分)【甲】观沧海东临碣石,以观沧海。
水何澹澹,山岛竦峙。
树木丛生,百草丰茂。
秋风萧瑟,洪波涌起。
日月之行,若出其中:星汉灿烂,若出其里。
幸甚至哉,歌以咏志。
【乙】曹刿论战(节选)《左传》十年春,齐师伐我。
公将战,曹刿请见。
其乡人曰:“肉食者谋之,又何间焉?”别曰:“肉食者鄙,未能远谋。
”乃入见。
问:“何以战?”公曰:“衣食所安,弗敢专也,必以分人。
”对曰:“小惠未遍,民弗从也。
”公曰:“牺牲玉帛,弗敢加也,必以信。
”对曰:“小信未孚,神弗福也。
”公曰:“小大之狱,虽不能察,必以情。
”对曰:“忠之属也。
可以一战。
战则请从。
”【丙】□□□□魏文侯既卒,起①事其子武侯。
武侯浮西河而下,中流,顾而谓吴起曰:“美哉乎山河之固,此魏国之宝也!”起对曰:“在德不在险。
昔三苗氏②左洞庭③,右彭蠡,德义不修,禹灭之。
夏桀④之居,左河济,右泰华,伊阙在其南,羊肠在其北,修政不仁,汤放之。
殷纣⑤之国,左孟门,右太行,常山在其北,大河经其南,修政不德,武王杀之。
由此观之,在德不在险。
若君不修德,舟中之人尽为敌国也。
”武侯曰:“善。
”《史记•孙子吴起列传》[注]①吴起:战国初期军事家、政治家、改革家,兵家代表人物之一。
②三苗氏:苗人部落最早的统领。
③洞庭:即洞庭湖。
后文“彭蟲”“河济”“泰华”“伊阙”“羊肠”“孟门”“太行”“常山”“大河”皆为山河名。
上海市闵行区2008学年第二学期高三年级质量调研考试数学试卷(文理科)考生注意:1.答卷前,考生务必在答题纸上将学校、班级、考号、姓名等填写清楚. 2.本试卷共有21道题,满分150分,考试时间120分钟.一. 填空题(本大题满分60分)本大题共有12题,考生应在答题纸上相应编号的空格内 直接填写结果,每个空格填对得5分,否则一律得零分. 1.方程2log (34)1x -=的解=x .2.(理)若直线l 经过点(1,2)P ,且法向量为(3,4)n =-,则直线l 的方程是 (结果用直线的一般式表示).(文)计算221lim 3(1)n n n n →∞+=- .3.(理)若函数31(1),()4(1).2x x f x x x x ⎧+≥⎪=⎨-<⎪-⎩则1(2)f-= .(文)若4()2x f x x -=-,则1(2)f-= .4.(理)若()sin 3cos f x a x x =+是偶函数,则实数a = .(文)若直线l 经过点(1,2)P ,且法向量为(3,4)n =-,则直线l 的方程是 (结果用直线的一般式表示).5.(理)在极坐标系中,两点的极坐标分别为(2,)3A π、(1,)3B π-,O 为极点,则O A B ∆面积为 .(文)若5,(0,0)2 6.x y x y x y +≤⎧≥≥⎨+≤⎩,则函数68k x y =+的最大值为 .6.(理)无穷数列1s i n 22n n π⎧⎫⎨⎬⎩⎭的各项和为 .(文)若()sin 3cos f x a x x =+是偶函数,则实数a = .7.根据右面的框图,该程序运行后输出的结果为 .8.(理)已知地球半径为6378公里,位于赤道上两点A 、B 分别在东经23 和143 上,则A 、B 两点的球面距离为 公里(π取3.14,结果精确到1公里).(文)已知一个圆柱的侧面展开图是边长为4的正方形,则该圆柱的体积为 . 9.(理)一个袋子里装有外形和质地一样的5个白球、3个绿球和2个红球,将它们充分混合后,摸得一个白球计1分,摸得一个绿球计2分,摸得一个红球计4分,记随机摸出一个球的得分为ξ,则随机变量ξ的数学期望E ξ= .(文)在航天员进行的一项太空试验中,先后要实施6道程序,则满足程序A 只能出现在最后一步,且程序B 和程序C 必须相邻实施的概率为 .10.(理)若关于x 的方程2310x a -+=在(],1-∞上有解,则实数a 的取值范围是 .(文)若关于x 的方程2310x a -+=在[1,)-+∞上有解,则实数a 的取值范围是 . 11.(理)对于任意0,2x π⎛⎤∈ ⎥⎝⎦,不等式242sin cos 2sin p x x x +≥恒成立,则实数p 的范围为 . (文)对于任意0,2x π⎛⎤∈ ⎥⎝⎦,不等式24sin cos 0p x x +≥恒成立,则实数p 的最小值为 .12.(理)通过研究函数42()21021f x x x x =-+-在实数范围内的零点个数,进一步研究可得2()21021(3,)ng x x x x n n =+--≥∈N 在实数范围内的零点个数为 . (文)通过研究方程4221021x x x =-++在实数范围内的解的个数,进一步研究可得函数212()21021(3,)n g x xx x n n -=+--≥∈N 在实数范围内的零点个数为 .二. 选择题(本大题满分16分)本大题共有4题,每题只有一个正确答案,选对得4分,答案代号必须填在答题纸上.注意试题题号与答题纸上相应编号一一对应,不能错位. 13.(理)“21<-x ”是“103x <-”的 [答]( )(A) 充分非必要条件. (B) 必要非充分条件. (C) 充要条件. (D) 既非充分也非必要条件.(文)“21<-x ”是“3<x ”的 [答]( )(A) 充分非必要条件. (B) 必要非充分条件. (C) 充要条件. (D) 既非充分也非必要条件.14.(理)若z ∈C ,且221z i +-=,则22z i --的取值范围是 [答]( )(A) []2,3. (B) []3,5. (C) []4,5. (D) []4,6.(文)若z ∈C ,且1z =,则2z i -的最大值是 [答]( )(A) 2. (B) 3. (C) 4. (D) 5. 15.函数xx x f 52)(+=图像上的动点P 到直线x y 2=的距离为1d ,点P 到y 轴的距离为2d ,则=21d d [答]( )(A) 5. (B)55. (C)5. (D) 不确定的正数.16.(理)已知椭圆cos sin x a y b θθ=⎧⎨=⎩(θ为参数)上的点P 到它的两个焦点1F 、2F的距离之比12:2:PF PF =12(0)2P F F παα∠=<<,则α的最大值为[答]( )(A)6π. (B)4π. (C)3π.(D) arccos3.(文)椭圆22221x y ab+=上的点P 到它的两个焦点1F 、2F的距离之比12:2:PF PF =且12(0)2P F F παα∠=<<,则α的最大值为 [答]( )(A) 6π. (B)4π. (C)3π.(D) arccos3.三. 解答题(本大题满分74分)本大题共有5题,解答下列各题必须在答题纸上与题号对应的区域内写出必要的步骤. 17.(本题满分12分)(理)已知22cos 10()210311xf x m x -=+的最大值为2,求实数m 的值.D 1 . A 1C 1EABCD B 1(文)已知sin 10()cos 1011x f x m x=-的最大值为2,求实数m 的值.18.(本题满分14分)本题共有2个小题,第1小题满分6分,第2小题满分8分. (理)在长方体1111ABC D A B C D -中,2A B =,1AD =,11A A =,点E 在棱A B 上移动.(1)探求A E 等于何值时,直线1D E 与平面11AA D D 成45 角; (2)点E 移动为棱A B 中点时,求点E 到平面11A D C 的距离.(文)如图几何体是由一个棱长为2的正方体1111ABC D A B C D -与一个侧棱长为2的正四棱锥1111P A B C D -组合而成. (1)求该几何体的主视图的面积;(2)若点E 是棱B C 的中点,求异面直线A E 与1PA 所成角的大小(结果用反三角函数表示).A 1B 1C 1D 1E C BAPD.19.(本题满分14分)本题共有2个小题,第1小题满分6分,第2小题满分8分.课本中介绍了诺贝尔奖,其发放方式为:每年一次,把奖金总金额平均分成6份,奖励在6项(物理、化学、文学、经济学、生理学和医学、和平)为人类作出了最有益贡献的人.每年发放奖金的总金额是基金在该年度所获利息的一半,另一半利息用于增加基金总额,以便保证奖金数逐年递增.资料显示:1998年诺贝尔奖发奖后基金总额已达19516万美元,假设基金平均年利率为 6.24%r =.(1)请计算:1999年诺贝尔奖发奖后基金总额为多少万美元?当年每项奖金发放多少万美元(结果精确到1万美元)?(2)设()f x 表示为第x (*x ∈N )年诺贝尔奖发奖后的基金总额(1998年记为(1)f ),试求函数()f x 的表达式.并据此判断新民网一则新闻 “2008年度诺贝尔奖各项奖金高达168万美元”是否与计算结果相符,并说明理由.20.(本题满分17分)本题共有3个小题,第1小题满分4分,第2小题满分6分、第3小题满分7分.(理)斜率为1的直线过抛物线22(0)y px p =>的焦点,且与抛物线交于两点A 、B . (1)若2p =,求A B 的值;(2)将直线A B 按向量(,0)a p =-平移得直线m ,N 是m 上的动点,求NA NB ⋅ 的最小值.(3)设(,0)C p ,D 为抛物线22(0)y px p =>上一动点,是否存在直线l ,使得l 被以C D 为直径的圆截得的弦长恒为定值?若存在,求出l 的方程;若不存在,说明理由. (文)斜率为1的直线过抛物线24y x =的焦点,且与抛物线交于两点A 、B . (1)求A B 的值;(2)将直线A B 按向量(2,0)a =-平移得直线m ,N 是m 上的动点,求NA NB ⋅ 的最小值.(3)设(2,0)C ,D 为抛物线24y x =上一动点,证明:存在一条定直线l :x a =,使得l被以C D 为直径的圆截得的弦长为定值,并求出直线l 的方程.21.(本题满分17分)(理)本题共有3个小题,第1小题满分4分,第2小题满分5分,第3小题满分8分.第3小题根据不同思维层次表现予以不同评分.对于数列{}n a(1)当{}n a 满足1n n a a d +-=(常数)且1n na q a +=(常数), 证明:{}n a 为非零常数列.(2)当{}n a 满足221n naa d +'-=(常数)且212n na q a+'=(常数),判断{}n a 是否为非零常数列,并说明理由.(3)对(1)、(2)等式中的指数进行推广,写出推广后的一个正确结论,并说明理由. (文)本题共有3个小题,第1、2小题满分各5分,第3小题满分7分.第3小题根据不同思维层次表现予以不同评分.对于数列{}n a(1)当{}n a 满足1n n a a d +-=(常数)且1n na q a +=(常数), 证明:{}n a 为非零常数列.(2)当{}n a 满足221n naa d +'-=(常数)且212n na q a+'=(常数),判断{}n a 是否为非零常数列,并说明理由.(3)对(1)、(2)等式中的指数进行推广,写出推广后的一个正确结论(不用说明理由).闵行区2008学年第二学期高三年级质量调研考试数学试卷参考答案和评分标准一、填空题:(每题5分)1. 2;2. 理:3450x y -+=、文:23; 3. 理:0、文:0;4.理:0、文:3450x y -+=;5.2;文:40; 6.理:25、文:0;7. 16; 8.理:13351、文:16π; 9.理:1.9、文:115;10.理:1,13⎛⎤⎥⎝⎦、文:1,3⎡⎫+∞⎪⎢⎣⎭; 11.理:[)2,+∞、文:0; 12.理:当n 为大于3的偶数时,2个零点;当n 为大于或等于3的奇数时,3个零点、文:3个零点. 二、选择题:(每题4分)13. A ; 14. B ; 15. C ; 16. C 三、解答题: 17.(本题满分12分) (理) 解:按行列式展开可得:2()2cos 2f x x x m =++ (3分)2cos 21x x m =+++ (6分)2sin(2)16x m π=+++,(9分)从而可得:212m ++=1m ⇒=-.(12分)(文) 解:按行列式展开可得()sin cos f x x m x =- (3分))x φ=+ (6分)由题意得:2= (9分) m =(12分)18.(本题满分14分)(理)解:(1)法一:长方体1111ABC D A B C D -中,因为点E 在棱AB 上移动,所以E A ⊥平面11AA D D ,从而1ED A ∠为直线1D E 与平面11AA D D 所成的平面角,(3分)1Rt ED A ∆中,145ED A ∠=1AE AD ⇒==(6分)法二:以D 为坐标原点,射线DA 、DC 、DD 1依次为x 、y 、z 轴,建立空间直角坐标系,则点1(0,0,1)D ,平面11AA D D 的法向量为(0,2,0)D C =,设(1,,0)E y ,得1(1,,1)D E y =-,(3分)由11sin 4D E D C D E D Cπ⋅=,得y =AE =(6分)(2)以D 为坐标原点,射线DA 、DC 、DD 1依次为x 、y 、z 轴,建立空间直角坐标系,则点(1,1,0)E ,1(1,0,1)A , 1(0,2,1)C ,从而1(1,0,1)D A = ,1(0,2,1)DC = ,(1,1,0)D E =(3分)设平面11D A C 的法向量为(,,)n x y z = ,由110n D A n D C ⎧⋅=⎪⎨⋅=⎪⎩ 020x z y z +=⎧⇒⎨+=⎩ 令1(1,,1)2n =-- , (5分)所以点E 到平面11A D C 的距离为n D Ed n⋅=1=. (8分) (文)解:(1)画出其主视图(如下图), 可知其面积S 为三角形与正方形面积之和. 在正四棱锥1111P A B C D -中,棱锥的高h =(2分)12442S =⋅=. (6分)(2)取11B C 中点1E ,联结11A E ,11A E AE 则11PA E ∠为异面直线A E 与1PA 所成角. (2分) 在11P A E ∆中,1112A E PA ==,又在正四棱锥1111P A B C D -中,斜高为1PE =, (4分)由余弦定理可得11cos PA E ∠==(6分)所以11arccosPA E ∠=,异面直线A E 与1PA所成的角为arccos(8分)19.(本题满分14分) 解:(1)由题意知:1999年诺贝尔奖发奖后基金总额为119516(1 6.24%)19516 6.24%2⨯+-⨯⨯20124.899220125=≈万美元; (3分)每项奖金发放额为11(19516 6.24%)101.483210162⨯⨯⨯=≈万美元; (6分)(2)由题意知:(1)19516f =,1(2)(1)(1 6.24%)(1) 6.24%2f f f =⋅+-⋅⋅(1)(1 3.12%)f =⋅+,1(3)(2)(1 6.24%)(2) 6.24%2f f f =⋅+-⋅⋅(2)(1 3.12%)f =⋅+2(1)(1 3.12%)f =⋅+所以, 1()19516(1 3.12%)x f x -=⋅+(*x ∈N ). (5分)2007年诺贝尔奖发奖后基金总额为9(10)19516(1 3.12%)f =⋅+2008年度诺贝尔奖各项奖金额为11(10) 6.24%13462f ⨯⨯⨯≈万美元,与168万美元相比少了34万美元,计算结果与新闻不符. (8分)1千万瑞典克朗怎么换成美元成了,137,154,168万美元?20.(本题满分17分)(理)解:(1)设1122(,),(,)A x y B x y ,2p =时,直线A B :1,y x =-代入24y x =中可得:2610x x -+= (2分) 则126x x +=,由定义可得:128AB x x p =++=. (4分) (2)直线A B :2p y x =-,代入22(0)y px p =>中,可得:221304x px p -+=则123x x p +=,2124px x =,设00(,)2p N x x +,则10102020(,),(,)22p p N A x x y x N B x x y x =---=---即22120120120120()()()()22p p N A N B x x x x x x y y x y y x ⋅=-+++-++++ (2分)由22121212123,,,24px x p x x y y p y y p +===-+= (4分)则222200037242()22N A N B x px p x p p ⋅=--=--当0x p =时,NA NB ⋅ 的最小值为272p -. (6分)(3)假设满足条件的直线l 存在,其方程为x a =,设C D 的中点为O ',l 与以C D 为直径的圆相交于点P 、Q ,设PQ 的中点为H ,则O H PQ '⊥,O '点的坐标为1122x p y +⎛⎫⎪⎝⎭,.12O P C D '===∵,111222x p O H a a x p +'=-=--, (2分)222PHO P O H''=-∴2221111()(2)44x p a x p =+---1()2p a x a p a ⎛⎫=-+- ⎪⎝⎭, 22(2)PQPH =∴14()2p a x a p a ⎡⎤⎛⎫=-+- ⎪⎢⎥⎝⎭⎣⎦. (5分)令02p a -=,得2p a =,此时PQ p =为定值,故满足条件的直线l 存在,其方程为2p x =,即抛物线的通径所在的直线. (7分)(文)(1)设1122(,),(,)A x y B x y ,直线A B :1,y x =-代入24y x =中可得:2610x x -+= (2分) 则126x x +=,由定义可得:128AB x x p =++=. (4分) (2)由(1)可设00(,1)N x x +,则10102020(,1),(,1)NA x x y x NB x x y x =---=---即22120120120120()(1)()(1)NA NB x x x x x x y y x y y x ⋅=-+++-++++(2分)由126x x +=,121x x =,12124,4y y y y =-+= (4分) 则220002862(2)14NA NB x x x ⋅=--=--当02x =时,NA NB ⋅的最小值为14-. (6分)(3)设C D 的中点为O ',l 与以C D 为直径的圆相交于点P 、Q ,设PQ 的中点为H ,则O H PQ '⊥,O '点的坐标为11222x y +⎛⎫⎪⎝⎭,.12O P C D '===∵,11212222x O H a a x +'=-=--, (2分) 222PH O P O H''=-∴221111(4)(22)44x a x =+---()2112a x a a =--+,22(2)PQPH =∴()21412a x a a ⎡⎤=--+⎣⎦. (5分) 令10a -=,得1a =,此时2PQ =为定值,故满足条件的直线l 存在,其方程为1x =,即抛物线的通径所在的直线. (7分) 21.(本题满分17分)(理)解:(1)(法一)11n n n n a a da qa ++-=⎧⎪⎨=⎪⎩(1)n n n qa a d q a d ⇒-=⇒-= 当1q =时,0n a ≠ ,所以0d =; 当1q ≠时,1n d a q ⇒=-是一常数,矛盾,所以{}n a 为非零常数列; (4分)(法二)设1(1)n a a n d =+-,则有:111(11)(1)n na a n d q a a n d+++-==+-,即11()a nd a q qd qdn +=-+所以11d qd a qa qd=⎧⎨=-⎩,解得01d q =⎧⎨=⎩.由此可知数列{}n a 为非零常数列; (4分)(2)记2n n a b =,由(1)证明的结论知: {}2n a 为非零常数列. (2分) 显然,{}2n a 为非零常数列时,{}n a 不一定为非零常数列,如:非常数数列()nn a p =-(p 为大于0的正常数)和常数列(n a p p =为非零常数)均满足题意要求. (5分) (3)根据不同思维层次表现予以不同评分.1仅推广到3次方或4次方的结论或者是特殊次方的结论 (结论1分,解答1分)2{}na 满足1m m n naad +'-=(常数)且1mn m na q a+'=(常数),则当m 为奇数时,{}n a 必为非零常数列;当m 为偶数时,{}n a 不一定为非零常数列.事实上,记m n n a b =,由(1)证明的结论知:{}n b 为非零常数列,即{}m n a 为非零常数列.所以当m 为奇数时,{}n a 为非零常数列;当m 为偶数时,{}n a 不一定为非零常数列. (结论2分,解答2分)或者:设1(1)m m n a a n d =+-,即mn a A B n =+,则1(1)mmn mna A n B q a A n B +++⎛⎫'== ⎪+⎝⎭,即1mB A Bn ⎛⎫+ ⎪+⎝⎭对一切n *∈N 均为常数,则必有0B =,即有m n a A =,当m为奇数时,n a =m为偶数时,0)n a A =>或者(0)n a A =<.3{}na 满足1mm n naad +'-=(常数)且1ln l na q a +'=(常数),且m l 、为整数,当m l 、均为奇数时,{}n a 必为非零常数列;否则{}n a 不一定为常数列.事实上,条件1ln l na q a +'=(正常数)可以转化为1()mm n l mna q a +'=(常数),整个问题转化为2 ,结论显然成立. (结论3分,解答3分)或者:设1(1)m m n a a n d =+-,即mn a A Bn =+,当m为奇数时,有n a =,则1(1)l l mn l naA nB q aA nB +++⎛⎫'== ⎪+⎝⎭,即1lmB A Bn ⎛⎫+ ⎪+⎝⎭对一切n *∈N 均为常数,则必有0B =,即有mn a A =,则n a =m 为偶数时,如反例:(1)nn a =-n *∈N ,它既满足m 次方后是等差数列,又是l (不管l 为奇数还是偶数)次方后成等比数列,但它不为常数列. 4{}na 满足1m m n naad +'-=(常数)且1ln l na q a+'=(常数),m l 、为有理数,'0q >, 则{}n a 必为非零常数列;否则{}n a 不一定为常数列.证明过程同3(结论4分,解答3分)5{}na 满足1m m n naad +'-=(常数)且1ln lna q a +'=(常数),且m l 、为实数,'0q >,{}na 是不等于1的正数数列,则{}na 必为非零且不等于1的常数列;否则{}na 不一定为常数列.事实上,当'0q >,m l 、为实数时,条件1ln l na q a+'=同样可以转化为1()mm n l m na q a+'=,记mnn a b =,由第(1)题的结论知:{}n b 必为不等于1的正常数数列,也即{}m n a 为不等于1的正常数数列,n a ={}n a 也是不等于1的正常数数列.(结论5分,解答3分)(文)解:(1)(法一)11n n n n a a d a qa ++-=⎧⎪⎨=⎪⎩(1)n n n qa a d q a d ⇒-=⇒-= (2分)当1q =时,0n a ≠ ,所以0d =; 当1q ≠时,1n d a q ⇒=-是一常数,矛盾,所以{}n a 为非零常数列; (5分)(法二)设1(1)n a a n d =+-,则有:111(11)(1)n na a n d q a a n d+++-==+-,即11()a nd a q qd qdn +=-+ (2分) 所以11d qd a qa qd =⎧⎨=-⎩,解得01d q =⎧⎨=⎩.由此可知数列{}n a 为非零常数列; (5分)(2)记2n n a b =,由(1)证明的结论知: {}2n a 为非零常数列. (2分) 显然,{}2n a 为非零常数列时,{}n a 不一定为非零常数列,如:非常数数列()nn a p =-(p 为大于0的正常数)和常数列(n a p p =为非零常数)均满足题意要求. (5分) (3)根据不同思维层次表现予以不同评分.1仅推广到3次方或4次方的结论或者是特殊次方的结论 (结论1分)2{}na 满足1m m n naad +'-=(常数)且1mn m na q a+'=(常数),则当m 为奇数时,{}n a 必为非零常数列;当m 为偶数时,{}n a 不一定为非零常数列.事实上,记m n n a b =,由(1)证明的结论知:{}n b 为非零常数列,即{}m n a 为非零常数列.所以当m 为奇数时,{}n a 为非零常数列;当m 为偶数时,{}n a 不一定为非零常数列. (结论3分)或者:设1(1)m m naan d =+-,即m naA B n =+,则1(1)mmn mna A n B q a A n B +++⎛⎫'== ⎪+⎝⎭,即1mBA Bn ⎛⎫+ ⎪+⎝⎭对一切n *∈N 均为常数,则必有0B =,即有m n a A =,当m为奇数时,n a =m为偶数时,0)n a A =>或者(0)n a A =<.3{}na 满足1mm n naad +'-=(常数)且1ln l n a q a+'=(常数),且m l 、为整数,当m l 、均为奇数时,{}n a 必为非零常数列;否则{}n a 不一定为常数列.事实上,条件1ln ln a q a+'=(正常数)可以转化为1()mm n l mna q a+'=(常数),整个问题转化为2 ,结论显然成立. (结论5分)或者:设1(1)m m n a a n d =+-,即mn a A Bn =+,当m为奇数时,有n a =,则1(1)l l mn l naA nB q aA nB +++⎛⎫'== ⎪+⎝⎭,即1lmB A Bn ⎛⎫+ ⎪+⎝⎭对一切n *∈N 均为常数,则必有0B =,即有mn a A =,则n a =m 为偶数时,如反例:(1)nn a =-n *∈N ,它既满足m 次方后是等差数列,又是l (不管l 为奇数还是偶数)次方后成等比数列,但它不为常数列. 4{}na 满足1m m n naad +'-=(常数)且1ln l na q a+'=(常数),m l 、为有理数,'0q >, 则{}n a 必为非零常数列;否则{}n a 不一定为常数列.证明过程同3(结论6分)5{}n a 满足1m m n naad +'-=(常数)且1ln l na q a+'=(常数),且m l 、为实数,'0q >,{}na 是不等于1的正数数列,则{}na 必为非零且不等于1的常数列;否则{}na 不一定为常数列.事实上,当'0q >,m l 、为实数时,条件1ln l na q a+'=同样可以转化为1()mm n l m na q a+'=,记mnn a b =,由第(1)题的结论知:{}n b 必为不等于1的正常数数列,也即{}m n a 为不等于1的正常数数列,n a ={}n a 也是不等于1的正常数数列.(结论7分)。
闵行区2012学年第二学期九年级质量调研考试数 学 试 卷(考试时间100分钟,满分150分)考生注意:1.本试卷含三个大题,共25题.2.答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答 题一律无效.3.除第一、二大题外,其余各题如无特别说明,都必须在答题纸的相应位置上写出证 明或计算的主要步骤.一、选择题:(本大题共6题,每题4分,满分24分) 【下列各题的四个选项中,有且只有一个选项是正确的,请选择正确选项的代号并填涂在答题纸的相应位置上】1.下列实数中,是无理数的是( )(A )3.14;(B )237; (C 1; (D .2.下列运算一定正确的是( )(A ) (B )1=;(C )2(a =; (D 2=-.3.不等式组21,10x x ->⎧⎨-<⎩的解集是( )(A )12x >-; (B )12x <-; (C )1x <; (D )112x -<<.4.用配方法解方程0142=+-x x 时,配方后所得的方程是( ) (A )2(2)3x -=; (B )2(2)3x +=; (C )2(2)1x -=;(D )2(2)1x -=-.5.在△ABC 与△A ′B ′C ′中,已知AB = A ′B ′,∠A =∠A ′,要使△ABC ≌△A ′B ′C ′,还需要增加一个条件,这个条件不正确的是( ) (A )AC = A ′C ′;(B )BC = B ′C ′;(C )∠B =∠B ′; (D )∠C =∠C ′. 6.下列命题中正确的是( ) (A )矩形的两条对角线相等; (B )菱形的两条对角线相等;(C )等腰梯形的两条对角线互相垂直; (D )平行四边形的两条对角线互相垂直.二、填空题:(本大题共12题,每题4分,满分48分) 【请将结果直接填入答题纸的相应位置上】7.计算:124= .8.因式分解:2x y x y -= .9x 的实数根是 .10.如果关于x 的一元二次方程220x x m -+=有两个实数根,那么m 的取值范围是 .11.一次函数2(1)5y x =-+的图像在y 轴上的截距为 . 12.已知反比例k y x=(0k ≠)的图像经过点(2,-1),那么当0x >时,y 随x 的增大而_________ (填“增大”或“减小).13.已知抛物线22y a x b x =++经过点(3,2),那么该抛物线的对称轴是直线 _______ . 14.布袋中装有3个红球和3个白球,它们除颜色外其他都相同,如果从布袋里随机摸出一个球,那么所摸到的球恰好为红球的概率是 . 15.如图,在平行四边形ABCD 中,AC 、BD 相交于点O ,如果AB a=,AD b= ,那么OC =.16.已知:⊙O 1、⊙O 2的半径长分别为2、5,如果⊙O 1与⊙O 2相交,那么这两圆的圆心距d的取值范围是 .17.如图,在正方形ABCD 中,E 为边BC 的中点,EF ⊥AE ,与边CD 相交于点F ,如果△CEF 的面积等于1,那么△ABE 的面积等于 . 18.如图,在Rt △ABC 中,∠C = 90°,∠A = 50°,点D 、E 分别在边AB 、BC 上,将△BDE沿直线DE 翻折,点B 与点F 重合,如果∠ADF = 45°,那么∠CEF = 度.三、解答题:(本大题共7题,满分78分) 19.(本题满分10分)先化简,再求值:21232()222x x x x x++÷+-+,其中2x =+20.(本题满分10分)解方程组:2223,44 1.x y x x y y +=⎧⎨-+=⎩(第15题图) A CBDE F (第18题图)A B C D EF (第17题图)21.(本题共2小题,满分10分,其中第(1)小题4分,第(2)小题6分)如图,在△ABC 中,AB = AC ,点D 在边AB 上,以点A 为圆心,线段AD 的长为半径的⊙A 与边AC 相交于点E ,AF ⊥DE ,垂足为点F ,AF 的延长线与边BC 相交于点G ,联结GE .已知DE = 10,12cos 13BAG ∠=,12AD D B=.求:(1)⊙A 的半径AD 的长;(2)∠EGC 的余切值.22.(本题共2小题,每小题5分,满分10分)为了有效地利用电力资源,电力部门推行分时用电.即在居民家中安装分时电表,每天6∶00至22∶00用电每千瓦时0.61元,每天22∶00至次日6∶00用电每千瓦时0.30元.原来不实行分时用电时,居民用电每千瓦时0.61元.某户居民为了解家庭的用电及电费情况,于去年9月随意记录了该月6天的用电情况,见下表(单位:千瓦时).(1计该用户去年9月总用电量约为多少千瓦时.(2)如果该用户今年3月份的分时电费为127.8元,而按照不实行分时用电的计费方法,其电费为146.4元,试问该用户今年3月份6∶00至22∶00与22∶00至次日6∶00两个时段的用电量各为多少千瓦时?(注:以上统计是从每个月的第一天6∶00至下一个月的第一天6∶00止)(第21题图)A FDEBCG23.(本题共2小题,每小题6分,满分12分) 已知:如图,在梯形ABCD 中,AD // BC ,AB = CD ,BC = 2AD .DE ⊥BC ,垂足为点F ,且F 是DE 的中点,联结AE ,交边BC 于点G . (1)求证:四边形ABGD 是平行四边形; (2)如果AD AB =,求证:四边形DGEC 是正方形.24.(本题满分12分,其中第(1)小题4分,第(2)小题3分,第(3)小题5分)已知:在平面直角坐标系中,一次函数3y x =+的图像与y 轴相交于点A ,二次函数2y x b x c =-++的图像经过点A 、B (1,0),D 为顶点. (1)求这个二次函数的解析式,并写出顶点D 的坐标; (2)将上述二次函数的图像沿y 轴向上或向下平移,使点D 的对应点C 在一次函数3y x =+的图像上,求平移后所得图像的表达式;(3)设点P 在一次函数3y x =+的图像上,且2A B PA B CSS∆∆=,求点P 的坐标.(第24题图)AB C DEF G (第23题图)25.(本题共3小题,满分14分,其中第(1)小题4分,第(2)、(3)小题每小题5分)如图,在平行四边形ABCD中,8A B=,tan2B=,CE⊥AB,垂足为点E(点E在边AB上),F为边AD的中点,联结EF,CD.(1)如图1,当点E是边AB的中点时,求线段EF的长;(2)如图2,设BC x=,△CEF的面积等于y,求y与x的函数解析式,并写出函数定义域;(3)当16B C=时,∠EFD与∠AEF的度数满足数量关系:EFD k AEF∠=∠,其中k≥0,求k的值.AB C DEF(图1)AB CDEF(图2)(第25题图)AB C DEF闵行区2012学年第二学期九年级质量调研考试数学试卷参考答案及评分标准一、选择题:(本大题共6题,每题4分,满分24分) 1.C ;2.D ;3.B ;4.A ;5.B ;6.A .二、填空题:(本大题共12题,每题4分,满分48分)7.2;8.(1)x y x -;9.2x =;10.1m ≤;11.3;12.增大;13.32x =;14.12;15.1122a b +;16.37d <<;17.4;18.35.三、解答题:(本大题共7题,满分78分) 19.解:原式32(2)(2)(2)32x x x x x x ++=⨯+-+……………………………………………(4分)2x x =-.…………………………………………………………………(2分)当2x =+时,原式3===4分)20.解:由 22441x x y y -+=,得 21x y -=,21x y -=-. ………………(2分)原方程组化为23,21x y x y +=⎧⎨-=⎩; 23,21.x y x y +=⎧⎨-=-⎩……………………………………(4分) 解这两个方程组,得原方程组的解是112,12x y =⎧⎪⎨=⎪⎩; 221,1.x y =⎧⎨=⎩…………………………………………………(4分)21.解:(1)在⊙A 中,∵ AF ⊥DE ,DE = 10,∴ 1110522DF EF DE ===⨯=. …………………………………(1分)在Rt △ADF 中,由 12cos 13AF DAF AD∠==,得 12AF k =,13AD k =.…………………………………………(1分) 利用勾股定理,得 222A F D F A D +=.∴ 222(12)5(13)k k +=.解得 1k =.……………………………(1分) ∴ AD = 13. …………………………………………………………(1分) (2)由(1),可知 1212A F k ==.………………………………………(1分) ∵12AD D B=, ∴13AD AB=.………………………………………(1分)在⊙A 中,AD = AE . 又∵ AB = AC , ∴ AD AE ABAC=.∴ DE // BC .…………………(1分)∴13AF AD AGAB==,EG C FEG ∠=∠.∴ AG = 36. ∴ 24FG AG AF =-=.…………………………(1分)在Rt △EFG 中,5cot 24EF FEG FG∠==.……………………………(1分)即得 5c o t 24EG C ∠=.………………………………………………(1分)22.解:(1)6∶00至22∶00用电量:4.5 4.4 4.6 4.6 4.3 4.6301356+++++⨯=.……………………………(2分)22∶00至次日6∶00用电量:1.4 1.6 1.3 1.5 1.7 1.530456+++++⨯=.………………………………(2分)所以 135 +45 = 180(千瓦时).……………………………………(1分)所以,估计该户居民去年9月总用电量为180千瓦时. (2)根据题意,得该户居民5月份总用电量为146.42400.61=(千瓦时).(1分)设该用户6月份6∶00至22∶00的用电量为x 千瓦时,则22∶00至次日6∶00的用电量为(240 –x )千瓦时. 根据题意,得 0.610.30(240)1x x +-=.……………………(2分) 解得 180x =.…………………………………………………………(1分)所以 24060x -=. …………………………………………………(1分) 答:该用户6月份6∶00至22∶00与22∶00至次日6∶00两个时段的用电量分别为180、60千瓦时.23.证明:(1)∵ DE ⊥BC ,且F 是DE 的中点,∴ DC = EC .即得 ∠DCF =∠ECF .……………………………………………(1分) 又∵ AD // BC ,AB = CD ,∴ ∠B =∠DCF ,AB = EC .∴ ∠B =∠ECF .∴ AB // EC .…………………………………(1分) 又∵ AB = EC ,∴ 四边形ABEC 是平行四边形.……………(1分)∴ 12B GC G B C ==.………………………………………………(1分)∵ BC = 2AD ,∴ AD = BG .………………………………………(1分) 又∵ AD // BG ,∴ 四边形ABGD 是平行四边形.……………(1分) (2)∵ 四边形ABGD 是平行四边形,∴ AB // DG ,AB = DG .…………………………………………(1分) 又∵ AB // EC ,AB = EC ,∴ DG // EC ,DG = EC .∴ 四边形DGEC 是平行四边形.…………………………………(1分) 又∵ DC = EC ,∴ 四边形DGEC 是菱形.……………………(1分) ∴ DG = DC .由 A D A B =,即得 CG C G ==.………………(1分)∴ 222D G D C C G+=.∴ 90G D C ∠=︒. ∴ 四边形DGEC 是正方形. ……………………………………(2分)24.解:(1)由 0x =,得 3y =.∴ 点A 的坐标为A (0,3).………………………………………(1分)∵ 二次函数2y x b x c =-++的图像经过点A (0,3)、B (1,0), ∴ 3,10.c b c =⎧⎨-++=⎩……………………………………………………(1分)解得 2,3.b c =-⎧⎨=⎩∴ 所求二次函数的解析式为223y x x =--+.……………………(1分)顶点D 的坐标为D (-1,4).…………………………………………(1分) (2)设平移后的图像解析式为2(1)y x k =-++.根据题意,可知点C (-1,k )在一次函数3y x =+的图像上, ∴ 13k -+=.…………………………………………………………(1分) 解得 2k =.……………………………………………………………(1分) ∴ 所求图像的表达式为2(1)2y x =-++或221y x x =--+.……(1分) (3)设直线1x =-与x 轴交于点E .由(2)得 C (-1,2).又由 A (0,3),得AC == 根据题意,设点P 的坐标为P (m ,m +3). ∵ △ABP 与△ABC 同高,于是,当 2ABP ABC S S ∆∆=时,得2A P A C ==.……………(1分) 此时,有两种不同的情况:(ⅰ)当点P 在线段CA 的延长线上时,得CP CA AP =+=,且0m >.过点P 作PQ 1垂直于x 轴,垂足为点Q 1.易得1E O A P C AO Q =.∴=2m =.即得 35m +=.∴ P 1(2,5).………………………………………………………(2分)(ⅱ)当点P 在线段AC 的延长线上时,得C P A P A =-0m <.过点P 作PQ 2垂直于x 轴,垂足为点Q 2.易得2EQ O E ACPC=.∴=.解得 2m =-.即得 31m +=.∴ P 2(-2,1).………………………………………………………(2分)综上所述,点P 的坐标为(2,5)或(-2,1).另解:(3)由(2)得 C (-1,2).又由 A (0,3),得AC == 根据题意,设点P 的坐标为P (m ,m +3).∵ △ABP 与△ABC 同高,于是,当 2ABP ABC S S ∆∆=时,得2A P A C ==.……………(1分)∴ 28AP =.即得 (33)8m m ++-=.………………………………………(1分) 解得 12m =,22m =-.………………………………………………(1分) ∴ m +3 = 5或1.……………………………………………………(1分) ∴ 点P 的坐标为(2,5)或(-2,1).……………………………(1分)25.解:(1)分别延长BA 、CF 相交于点P .在平行四边形ABCD 中,AD // BC ,AD = BC .……………………(1分) 又∵ F 为边AD 的中点,∴12PA AF PF PBBCPC===.即得 P A = AB = 8.……………………(1分)∵ 点E 是边AB 的中点,AB = 8,∴ 142AE BE AB ===.即得 12PE PA AE =+=.∵ CE ⊥AB ,∴ tan 428EC BE B =⋅=⨯=.∴ 23P C =1分) 在Rt △PEC 中,90PEC ∠=︒,12PF PC =,∴ 12E F P C ==.………………………………………………(1分) (2)在Rt △PEC 中,tan 2EC B BE ==,∴ 12B E E C=. 由 BC = x ,利用勾股定理 222BE EC BC +=,得 5B E x=.即得 25EC BE ==.………………………(1分)∴ 85A E AB B E x =-=.∴ 165PE PA AE =+=-.…(1分) 于是,由 12P F P C=,得 111222E F CP ECy S S P EE C∆∆===⨯⋅.∴ 1(16)455y x x =.………………………………………(1分)∴ 21105y xx =-,0x <≤.………………………………(2分)(3)在平行四边形ABCD 中,AB // CD ,CD = AB = 8,AD = BC = 16.∵ F 为边AD 的中点,∴ 182A F D F A D ===.………………(1分)∴ FD = CD .∴ D F C D C F ∠=∠.………………………………(1分)∵ AB // CD ,∴ ∠DCF =∠P .∴ ∠DFC =∠P . ……………………………………………………(1分)在Rt △PEC 中,90PEC ∠=︒,12PF PC=,∴ EF = PF .∴ ∠AEF =∠P =∠DFC .又∵ ∠EFC =∠P +∠PEF = 2∠PEF . ……………………………(1分) ∴ ∠EFD =∠EFC +∠DFC = 2∠AEF +∠AEF = 3∠AEF .即得 k = 3.……………………………………………………………(1分)。
闵行区2008学年第二学期九年级质量调研考试物 化 试 卷(满分150分,考试时间100分钟)化学部分可能用到的相对原子质量:H-1 C-12 O-16 Mg-24 Cl-35.5 Fe-56一、 单项选择题(共20分) 1.下列变化属于物理变化的是2.生活中常见的下列物质,属于纯净物的是A .蒸馏水B .洗洁精C .酱油D .加碘食盐 3.下列物质的化学式,书写正确的是A .氯化铁(FeCl 2)B .氢硫酸(H 2SO 4)C .氧化钠(NaO )D .硫化钠(Na 2S ) 4.科学家研发出一种以甲醇、氢氧化钾(KOH )为原料,用于手机的高效燃料电池。
氢氧化钾(KOH )属于A .酸B .碱C .盐D .氧化物 5.2008年5月12日14时28分,四川坟川发生里氏8级地震,饮用水受到严重污染。
小静同学设计了以下净水流程:水样~沉降~过滤~吸附~消毒~饮用水,可用作上述“消毒”的试剂是A .液氯B .活性炭C .高锰酸钾D .烧碱 6.下列关于溶液的说法中,正确的是A .不饱和溶液一定是稀溶液B .溶液一定是无色透明的C .溶液一定是均一稳定的D .溶液中的溶剂只能为水 7.寻找知识的特殊点,是掌握知识的重要方法。
下列“特殊点”的叙述正确的是 A .空气中含量最多的物质是氧气 B .最轻的气体是氦气 C .地壳中含量最多的元素是铝元素 D .最简单的有机物是甲烷 8.市场有一种新型饭盒“即热饭盒”,加热盒饭时发生的化学反应有:Mg+2H 2O→Mg(OH)2+H 2↑。
该反应中氧化剂是A .MgB .H 2OC .Mg(OH)2D .H 2学校_____________________ 班级__________ 姓名_________ 准考证号______________…………………………密○………………………………………封○………………………………………○线…………………………9.下列说法正确的是A.分子是构成物质的微粒,因此物质都是由分子构成的B.某雨水的pH小于5.6,因此雨水中溶解的是SO2C.C60和石墨的组成元素相同、原子排列方式不同,因此它们的性质存在差异D.金属化合物在灼烧时,火焰呈特殊颜色,化学上称作焰色反应10.2月9日,正值我国传统节日元宵节,由于违规燃放烟花,引起央视新址配楼发生大火,损失惨重。
经公安消防官兵用高压水枪最终扑灭了大火。
水能灭火主要是A.水隔绝了空气B.水覆盖在可燃物表面,隔离了可燃物C.水蒸发吸热,使可燃物降温到着火点以下D.水蒸发吸热,降低了可燃物的着火点11.学习化学时可用右图表示某些从属关系,下列选项正确的是A B C DX 乳浊液石油游离态复分解反应Y 悬浊液化石燃料化合态中和反应12.在一定条件下,木炭、一氧化碳、氢气都能与氧化铜发生反应,下列叙述错误的是A.反应都属于氧化还原反应B.反应类型都是置换反应C.反应后都能生成红色固体D.反应中氧化铜都作氧化剂13.40℃时,甲物质与乙物质的溶解度相等。
将40℃时两种物质的饱和溶液各a克分别降温到20℃,都析出晶体(不含结晶水),则析出晶体的质量A.甲较多B.乙较多C.两者相等D.无法确定14.根据实验操作规范判断,有关实验操作正确的是A.把鼻子凑到容器口去闻气体气味B.要节约药品,多取的药品放回原试剂瓶C.块状而又无腐蚀性的药品允许用手直接取用D.使用托盘天平称量物质时,砝码要用镊子夹取15.无土栽培所用的某种营养液中,含硝酸钾的质量分数为7%,某蔬菜生产基地欲配制该营养液200 kg,需要硝酸钾的质量是A.7 kg B.14 kg C.70 kg D.140 kg16.对下列实验事实的解释正确的是实验事实解释A 长期盛放氢氧化钠溶液的试剂瓶口,出现白色粉末氢氧化钠发生了潮解B 水银温度计受热是水银柱上升汞原子体积变大C 某化肥加熟石灰研磨,没有嗅到氨味无氨气放出,一定不是氮肥D 硫在空气里燃烧,发出微弱的淡蓝色火焰;在氧气里燃烧,发出明亮蓝紫色火焰硫和氧气反应,氧气的相对含量不同,反应的剧烈程度不同17.现有碳酸钾、碳酸钙、硫酸铜三种白色的固体粉末,用最经济、简便,现象明显的方法鉴别,应选用下列试剂中的 A .蒸馏水B .紫色石蕊试液C .稀盐酸D .烧碱溶液18.如图为A 物质的溶解度曲线,M 、N 两点分别表示A 物质的两种溶液。
下列做法不能实现M 、N 间的相互转化的是(A 从溶液中析出时不带结晶水) A .从M→N :先将M 降温再将其升温 B .从M→N :先将M 升温再将其蒸发掉部分水 C .从N→M :先向N 中加入适量固体A 再降温 D .从N→M :先将N 降温再加入适量固体A19.为验证Zn 、Cu 、Ag 三种金属的活动性是依次减弱的,某化学兴趣小组设计了下图所示的四个实验。
其中不必进行的是20.下列四个图像,分别对应四种操作过程,其中正确的是A .向盐酸中不断加水B .一定质量的镁在密闭的容器内燃烧C .等质量的铁和镁同时分别放入两份溶质质量分数相同的足量稀盐酸中D .某温度下,向一定质量的饱和氯化钠溶液中加入氯化钠固体二、填空题(共20分)21.从H 、O 、C 、N 、K 五种元素中选择适当的元素按要求填空。
(1)用适当的数字和符号填空:①2个氮分子 ;②3个氢氧根 ;③硝酸铵中显-3价的氮元素 。
(2)写出符合下列要求的物质的化学式:①具有优良导电性的非金属单质是 ;②能用于人工降雨的物质是 ; ③草木灰的主要成分是 。
22.形象的微观示意图有助于我们认识化学物质和理解化学反应。
(1)若用表示氢原子,用表示氧原子,则表示 (填化学符号);稀HCl 稀HCl 稀HCl AgNO 3溶液A B C D CuZnAgCu生成 气体 质量 0Fe Mg A B C DpH 7ABCDEFab(2)ClO 2是新一代饮用水的消毒剂,我国最近成功研制出制取ClO 2的新方法,其反应的微观过程如图所示。
①请写出该反应的化学方程式 。
②上述四种物质中,属于氧化物的是(填化学式,下同) ;氯元素的化合价为+3价的物质是 。
③在ClO 2中含氧元素的质量分数为 。
(精确到0.1)23.我国“神州六号”载人航天飞船探访太空圆满完成任务,创造了我国航天史的新辉煌。
其中航天飞行器座舱的空气更新过程如下图所示。
请分析回答:座舱装置(Ⅰ)装置(Ⅱ)装置(Ⅲ)空气空气、CO 2、H 2OCO 2H 2H 2OO 2H 2O(1)在上图空气更新的过程中,C 、H 、O 三种元素中的 元素没有参与循环利用。
(2)装置(Ⅱ)中的CO 2和H 2在催化剂条件下发生了反应,其反应的化学方程式为 ,装置(Ⅲ)中发生反应的基本类型为 反应。
(3)从装置(I )、(Ⅱ)、(Ⅲ)中可知道O 2来自 和 (填化学式)两种物质。
24.葡萄糖(C 6H 12O 6)是生物体内新陈代谢不可缺少的营养物质,它发生氧化反应放出的热量是人类生命活动所需能量的重要来源。
(1)1 mol 葡萄糖中含有 个氧原子。
(2)呼吸作用吸入的氧气与体内的葡萄糖反应生成二氧化碳和水,反应的化学方程式为 。
96g 氧气能够消耗掉 mol 葡萄糖。
(写出计算过程)三、简答题(共20分)25.今天是实验室的开放日,实验室提供了以下装置,现邀请你与某兴趣小组的同学一起来参加实验探究活动。
(1)指出编号仪器的名称:a ,b 。
稀盐酸氢氧化钠溶液(滴有酚酞)碳酸钠溶液石灰水CO 2氢氧化钠溶液甲 乙 丙(2)若用氯酸钾和二氧化锰来制取一瓶氧气,则应选用的装置是 (填字母),有关的化学方程式 ,上述装置选择的依据是 (填字母)。
A .属于固固型加热的反应 B .属于固液型不加热的反应 C .制取的气体密度比空气大 D .制取的气体难溶于水(3)李同学设计了下(图1)装置制取和收集CO 2,A 装置的名称_____ ____,反应的化学方程式是 , A 装置是否正在产生CO 2____ ____(填“是”或“否”)。
双氧水与MnO 2粉末混合制氧气不能使用该装置的主要原因是___ 。
(4)若要得到干燥的CO 2,(图1)还需要一个干燥装置,干燥剂为浓硫酸[如(图2)所示]。
请你用箭头在(图2)中标明气体进出方向........。
26.化学课上,同学们利用下列实验探究碱的化学性质:(1)甲实验中加入指示剂酚酞的目的是 ; (2)乙实验中反应的化学方程式为 ; (3)丙实验观察到的现象是 ;(4)实验结束后,同学们将废液倒入同一只废液缸中,发现废液浑浊并显红色,小刚脱口而出“废液中含有氢氧化钠”,小刚的说法正确吗?说明理由 。
于是同学们对废液的成分展开讨论和探究:【猜想与假设】通过分析上述实验,同学们猜想:废液中除酚酞外还一定含有 ,可能含有 中的一种或几种。
【查阅资料】CaCl 2+Na 2CO 3→CaCO 3↓+2NaCl【实验验证】同学们取一定量的废液过滤后,向滤液中逐滴加入 稀盐酸,根据反应现象绘制了如图所示的示意图。
【结论解释】分析图象数据得出可能存在的物质中,含有 ;没有 ,理由是 。
A B图1图2稀盐酸石灰石 滴加盐酸的质量生成 气 体 的 体 积以下无正文仅供个人用于学习、研究;不得用于商业用途。
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