《名校冲刺卷》2

人教版小学分班考试检测卷（二）[时间:90分钟满分:100分]一、选择题（满分10分，每小题2分）1、六(1)班有学生46人，每人用数字1、2、3任意写一个没有重复数字的三位数，那么至少有( )人写的数一定相同。

A．8 B．7 C．6 D．162、一个圆柱体，侧面展开图是正方形，它的边长是37.68cm，它的底面半径是( )cm.A. 0.3B. 3C. 6D. 103、X、Y是两种相关联的量，同时X=Y（X、Y≠0），那么X和Y成( )。

A. 正比例B. 反比例C. 不成比例4、某种商品打七折出售，比原价便宜了75元，这件商品原价( )元。

A.525B.225C.250D.1505、一个长方体，相交于同一个顶点的三条棱长度的比是1：1：2，它们的和是80厘米。

这个长方体的体积是( )立方厘米。

A．400 B．3200 C．4000 D．16000二、填空题（满分30分，每小题3分）1、把一根圆柱形木料削成一个与其等底等高的圆锥，削去部分的体积是8.4 dm3，原来圆柱形木料的体积是( )dm³，圆锥的体积是( )dm³。

2、一张长12厘米、宽5厘米的长方形纸板，最多可以剪边长为2厘米的小正方形( )个。

3、王阿姨在街上租一间门市开了一家服装店。

去年每月租金为a元，今年每月租金比去年上涨了20%，今年每月租金是( )元。

当a=1000时，今年每月的租金是( )元。

4、有一个圆半径是60厘米，在它的一条直径上排满了10个大小不等、相邻两圆都相切的圆，我们不知道这十个圆的直径分别是多少，它们周长的和是( )厘米．5、如果3x=，那么X与Y成比例．x：y=（：）6、在中国，夏至是一年中白昼最长，黑夜最短的一天。

这天柯桥的白昼与黑夜时间比大约是7：5，那么夏至这天柯桥的白昼约有( )小时。

2018年的夏至是6月21日星期四，据此推算，2018年的9月10日教师节是星期 ( )。

7、密封的瓶中，如果放进一个细菌，60秒钟后充满了细菌，已知每个细菌每秒分裂成2个，两秒钟分裂成4个，如果开始放8个细菌．要使瓶中充满细菌最少需要( )秒。

秘密★启用前试题类型：A2023年省际名校联考二（冲刺卷）语文注意事项：1.答卷前，考生务必将自己的姓名、准考证号等填写在试卷和答题卡指定位置上。

2.回答选择题时，选出每小题答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑。

如需改动，用橡皮擦干净后，再选涂其他答案标号。

回答非选择题时，将答案用0.5mm 黑色笔迹签字笔写在答题卡上，写在本试卷上无效。

3.考试结束后，将本试卷和答题卡一并交回。

一、现代文阅读（35分）（一）现代文阅读I（本题共5小题，17分）阅读下面的文字，完成1~5题。

在由科幻小说《三体》改编的同名电视剧中，对撞机可以说是最重要的道具了——正是因为“三体人”利用它们的高科技产物“智子”影响了地球上对撞机的实验，使得物理实验结果变得无规律可循，才让一部分科学家的信念崩塌，走上了自绝之路。

那么，对撞机，究竟是个什么机？它对人类有哪些作用呢？对撞机是测量高能粒子实验的仪器，目的是要发现"新物理-新粒子"，包括场能效粒子-超对称粒子-超额维度量子等。

作为粒子物理学最重要的研究设施，对撞机能够直接决定粒子物理学大多数研究方向的发展水平。

那么，作为真实存在的科研设备，对撞机对人类有哪些作用呢？作为粒子物理学最重要研究设施的对撞机，能够直接决定粒子物理学大多数研究方向的发展水平。

而粒子物理学的研究，则会直接面对物质最基本的组成成分，以及物质间的最基本的相互作用这样的研究对象。

对物质的最基本的成分和相互作用的探索不仅可以满足人类的好奇心，也会为未来几十年甚至上百年后的应用储备知识。

在一个科学技术健康发展的社会，基础科学的研究水平应该是超越当前时代的。

也只有如此，能够影响人类生活的技术才能在有科学理论指导的情况下发展。

也正是因为这样，《三体》小说和电视剧才会有"三体人"利用干扰对撞机实验来"锁死"人类科技的情节。

然而，对撞机不仅仅能够对粒子物理学研究起到至关重要的作用。

2024年省际名校联考二(冲刺卷)英语参考答案与详解A卷选择题答案第一部分听力1-5 BABCA 6-10 CAABC 11-15 BBACA 16-20 CCBBG第二部分阅读21-23 DBB 24-27 DBCB 28-31 CAAD 32-35 DAAC 36-40 EAGBC 第三部分语言运用完形填空41-45 ABDCB 46-50 BCDCA 51-55 AACBDB卷选择题答案第一部分听力1-5 BCBAC6-10 CBBAC11-15 BBACA16-20 CCABA第二部分阅读21-23 DBB24-27DBCB28-31 CAAD32-35 DAAC36-40 EAGBC第三部分语言运用完形填空41-45 BDACB 46-50 ACDCB51-55 DCBAAA、B卷非选择题参考答案语篇填空56.to think57.growing58.ruins59.was made60.to61.eventually62.those63.significant64.the65.whoever第四部分写作第一节略。

第二节One possible version(仅供参考)Overhead,the sun continued to burn in the cloudless sky.Gradually,David felt tired and thirsty.His head felt as if itwere on fire as the sun was burning through his cap,which was consuming his energy,Hte was beginning to feel weak.Ashe pushed on,the heated metal of his wheels burned into his hands.With each passing minute,he was breathing harder.Every single push also made his arms and shoulders ache badly.Despite this,he never thought of stopping.He was deiermined to overcome every single challenge.Removing his cap and throwing it away,he gathered up all hisstrength and pushed hard forward.Just at that time,the crowd shouted again,“Go,David,go!”Then,he felt as if he wereflying at an unstoppable speed.Ten minutes later,the tape was finally coming into view.Delighted and grateful,he wentpast the ribbon.The entire stadium was filled with victorious screams because David's persistence paid off.2024年省际名校联考二(冲刺卷)英语参考答案详解第一部分听力略第二部分阅读第一节A篇【语篇解读】本篇是应用文，主题语境为人与社会。

2021高考名校导航冲刺金卷·英语（二）参考答案、提示及评分细则听力原文：（Text1）M:After getting my hair cut,I’m going to go to the library.W:Please stop to get some food on your way home,if you have time.(1)（Text2）M:Linda,if I make more money at work,I can buy it.W:I don’t think it is a good idea to buy a new car.(2)We don’t have an apartment of our own.M:Oh,I know what is on your mind...（Text3）M:Where’s Professor Porter this evening?W:He’s sleeping in his room.M:Really?What’s wrong with him?W:He has the flu.But he took some pills,and he’s feeling better now.(3)（Text4）M:Lucy,you look nice in that blouse today.It goes so well with your skirt.(4)W:Thank you.I happened to see it yesterday in a clothing shop,and there was only one left in my size.And what’s cool is that it only cost me18pounds.（Text5）（总结题）M:Let’s have chicken soup for dinner,dear.W:No,I want vegetable soup instead.The vegetable soup is light—perfect for a warm summer night like this.（Text6）W:Hello,Mr.Green.This is Erin speaking.M:Hi,Erin.W:I would like to see if I can meet with you today.(6)M:I am afraid I have an important meeting to attend today.W:Well,what time would be convenient for you,then?(6)M:How about Thursday morning?W:Thursday morning?I have a dentist appointment then.Is the afternoon OK?M:Well,how long would you like to meet for?W:About half an hour.M:OK,but the earlier the better.I have to prepare for my daughter’s parent-teacher meeting at5:30p.m.on Friday.(7)（Text7）W:Let’s go to bed.(8)M:I’ve got to finish these reports before I go to work in the morning.(8)You go ahead,and I’ll be there as soon as I can. W:You’ve said that every night this week,Phillip!M:Cindy,please.I told you about this project a couple of weeks ago.You knew how busy things were going to get this week.(9)W:Yeah,but I didn’t think you’d be up until three in the morning all week!M:It won’t be like this next week,I promise.But my boss is depending on me.He has a very important presentation tomorrow morning.W:I understand.(10)（Text8）W:Hello,may I speak to Mr.Scott?M:Speaking.W:This is Alice,the exchange student from Seattle.M:Oh,hi,Alice.How can I help you?W:I am flying to Chicago tomorrow.Would you please tell my host parents,Mr.and Mrs.Black,about my arrival?(11)(13)M:Sure,of course.I’d be happy to.I’m sure they can’t wait to see you.(13)W:Thank you,Mr.Scott.M:My pleasure,Alice.Which flight are you taking?W:I’m taking Flight UA732at5:00tomorrow morning.M:So,when are you arriving at the Chicago airport?W:At11:00a.m.M:OK.Alice,UA732,11:00a.m.tomorrow.W:Right.M:Alice,can you tell me how they can recognize you?(12)W:Sure.I have long hair and wear glasses.I’ll be wearing a T-shirt and shorts.(12)M:OK.I will tell them.W:Thank you so much,Mr.Scott.M:You are welcome.（Text9）M:Hello.I haven’t seen you for a while.What’s up?W:Oh,hey.I’m OK,but I do have a small problem,though.M:Tell me about it.I might be able to help.W:Well,I’m moving into a new apartment tomorrow,and I need a truck to move my furniture and everything else.But I have no idea where I can get a truck.(14)M:Well,don’t worry.A friend of mine just bought a new truck.It’s a big one,and I’m sure it will be good enough to carry all your belongings.I can call him if you want.(15)W:Wow.That sounds great!But his truck is new.What if I get it dirty or scratch it?I’d feel really bad about that.M:Yeah,I totally understand.You might try to rent a truck then.Maybe you should give a call tonight and arrange a time for tomorrow.You can rent a moving truck for as many days as you need it.W:I have thought about that before,but that’s expensive.(16)I need to save some money for my textbooks next term.（Text10）In Australia,different people have different ways to enjoy themselves.They also have their own ideas about how to pass the time.(17)Most children work hard in school because they have to take lots of exams.After school,they don’t want to stay at home reading books anymore.Instead,they put aside their school bags and go out to play games.(18) Many old people get up early in the morning.Then they go to parks to read newspapers.It helps them know what is happening around the world.After breakfast,they go to the horse races,dog races,and sometimes car races.In the evening, they stay at home and watch TV,sometimes with their grandchildren.(19)Some older people also enjoy fishing and gardening.Young people prefer to go out during the holidays.On the weekends,they go to the mountains to have picnics or to the forest to hunt and camp.They usually leave on Friday and spend one or two days outside.Then on Sunday evening, they make their way back home on the highway.Nobody seems to be in a hurry,although a busy week is waiting for them again.(20)参考答案1-5BABCB6-10CBBCA11-15CBCAB16-20ABCCB21.B细节理解题。

备战2024年高考地理阶段性模拟仿真冲刺卷（江苏专用）高考模拟卷（二）（本卷共25小题，满分100分，考试用时75分钟）第I卷（选择题）一、单项选择题：本题共22小题，每小题2分，共44分。

在每小题给出的四个选项中，只有一项是符合题目要求的。

西风漂流绕过南美大陆南端后部分向北形成北上寒流"与巴西暖流交汇后东流"两支洋流交汇处（BMC）纬度位置的年内%年际变化是很多因素共同作用的结果!下图示意1993~2016年BMC所在纬度的年际变化!完成下面1-2小题。

1．与1993~2016年BMC移动总趋势成因相关的是（）①西风减弱①西风增强①极地东风减弱①信风增强A．①①B．①①C．①①D．①①2．推测一年中BMC纬度位置偏北时（）①地中海沿岸森林火险等级高①北印度洋洋流呈逆时针方向运动①长江入海口处盐度较低①地球公转至近日点附近A．①①B．①①C．①①D．①①某中学生于某地观测太阳，发现当地冬至与夏至正午太阳高度之差为42°（①H=H冬至-H夏至，且H 夏至≠0），冬至日该中学生在海边面朝太阳拍照（下图），查询得知太阳位于西偏南20°方位。

完成下面3-4小题。

3．随后太阳即将位于（）A．①处B．①处C．①处D．①处4．五天后继续观测，发现（）A．地方时18时前日落B．正午太阳高度角增大C．日出方位向南移动D．昼长增加，夜长减小下图是我国南方某山地地形剖面线和森林乔木层顶部的高度线，在一次森林大火后，当地原始植被损失殆尽。

据此完成下面5-7小题。

5．坡脚乔木植被高度和植株大小明显优于坡顶的主要影响因素是（）A．光照B．降水C．土壤D．热量6．冬春季节，森林大火过后，制约新生植被发育的主要因素是土壤（）A．温度B．肥力C．质地D．水分7．森林大火后，下列针对当地生态环境修复的处理方式恰当的是（）①封山育林①平整土地造林①飞播造林①种植柑橘A．①①B．①①C．①①D．①①热带辐合带，两半球信风气流形成的辐合地带的总称。

2023-2024学年江苏省苏州市名校中考冲刺卷英语试题含答案注意事项：1．答卷前，考生务必将自己的姓名、准考证号、考场号和座位号填写在试题卷和答题卡上。

用2B铅笔将试卷类型（B）填涂在答题卡相应位置上。

将条形码粘贴在答题卡右上角"条形码粘贴处"。

2．作答选择题时，选出每小题答案后，用2B铅笔把答题卡上对应题目选项的答案信息点涂黑；如需改动，用橡皮擦干净后，再选涂其他答案。

答案不能答在试题卷上。

3．非选择题必须用黑色字迹的钢笔或签字笔作答，答案必须写在答题卡各题目指定区域内相应位置上；如需改动，先划掉原来的答案，然后再写上新答案；不准使用铅笔和涂改液。

不按以上要求作答无效。

4．考生必须保证答题卡的整洁。

考试结束后，请将本试卷和答题卡一并交回。

Ⅰ. 单项选择1、Dennis was in a hurry to leave, so he picked up the wrong hat _________.A．in time B．in person C．by mistake D．by hand2、—How do you like the fish I cooked for you?—I haven’t had it yet. However, it ________ good.A．smells B．tastesC．sounds D．feels3、—Do you know Shanghai is one of _______ in the world?—Yes, it’s bigger than _______ city in China.A．the biggest city; any B．the biggest cities; anyC．the biggest cities; any other D．the biggest cities; the other4、一Bob,are you free at the moment? I have to ask you some questions.一.A．It's a pleasure B．You've got it C．Help yourself D．Y es, go ahead5、--- do you wash your hair?--- Every day. So it gets too dry.A．How often B．How long C．How far D．How soon6、—Could I borrow your camera tomorrow?—I don’t think you need it, because visitors to take photos in the museum.A．don’t allow B．aren’t allowed C．weren’t allowed7、—What? We can take buses with just a mobile?—Yes. Buses in Yangzhou began to _____ Alipay app.A．share B．save C．search D．support8、–Why do you like climbing mountains?--Because they are there and climbing is _____thing I have ever done.A．the more exciting B．the most excitingC．the more excited D．the most excited9、—Why don’t you join the English club to improve your spoken English?—_____A．Sounds like a good idea. B．It’s my pleasure.C．That’s all right.10、一Already five people in the taxi, but the driver managed to take me as well.一Terrible, and it be an uncomfortable journey.A．can B．should C．must D．needⅡ. 完形填空11、A few years ago, I saw a movie called Living Out Loud which carried a great message. This movie was about a woman who lived her life for everyone 1 herself. She was hiding and holding her life back for others. She did not have her own voice. She lived in fear of(害怕) 2 her life could be like. It silenced her. This movie made me 3 myself: Am I silent in my life? If you know me, you would 4 “No”. But there are so many of us that are silent in our lives.I want to tell you that life is special. This is your life and I want you to take your gift and live it. Decide today that you are going to live out loud.Living out loud means having the 5 to be who you are. It means admitting yourmistakes without 6 the past. So set all the shame, all the worry and all the fear free. Y ou can’t live out loud if you are hiding behind what was. Living out loud means devoting(奉献) yourself to what is right now: that is you!Living out loud means 7 your shortcoming(缺点) and celebrating your strength. In order to live out loud, you must 8 yourself. Most 9 , in order to liveout loud, you must love yourself.You may have been living our life in silence. If not, take one step forward. 10 who you are and what you are. Be yourself and love yourself. It’s time for all of us to start living out loud1．A．except B．besides C．including2．A．how B．which C．what3．A．asking B．to ask C．ask4．A．say B．tell C．speak5．A．courage B．success C．honesty6．A．admitting B．telling C．regretting7．A．accepting B．understanding C．receiving8．A．belief B．believe in C．belief in9．A．important B．importantly C．importance10．A．Be proud of B．Be fond of C．Be made ofⅢ. 语法填空12、阅读短文，在空白处填入一个．．适当的词，或填入括号中所给单词的正确形式（不多于3个单词）。

2023届山西省际名校联考二（冲刺卷）英语试卷学校：___________姓名：___________班级：___________考号：___________ 一、阅读理解Nowadays, over 6,000 national parks exist in the world. Of all, these are the ones that have been around for hundreds of years and should be on everyone’s bucket list.Guilin and Lijiang River National Park, ChinaIt is surrounded by striking natural beauty and can be explored by land. But the river national park, as the name suggests, is best explored through leisurely boat rides and cruises that take visitors through many canals and ancient towns that come along the way of the river. Calanques National Park, FranceWhile most go to France for the twinkling Eiffel Tower, few tour plans involve a stop at the Calanques National Park, which is made up of both land and sea, with over 140 protected species of animals and plants that reside inside. Because of its topography, the park is unique in that it can be explored through a mix of activities both for those who like waterbodies and those who’d rather stay on land.Yorkshire Dales, United KingdomContrary to the popular association of national parks with the wilderness it is filled with winding valleys, hills and villages where over 24,000 people live and work. Yorkshire Dales is also home to several food shops, and the park hosts cheese festivals and farmers markets regularly, so it’s best to go hungry.Kakadu National Park AustraliaIt is a delight for those who like a bit of history mixed with the biodiversity of national parks. While it houses thousands of species of wildlife, there’s more to the national park than that.1、What is recommended for a trip to Guilin and Lijiang River National Park?A.Observing local customs.B.Exploring it through boats.C.Witnessing geological process.D.Going with an empty stomach.2、What can tourists do in Calanques National Park?A.Visit an archeological reserve.B.Enjoy the local farmers markets.C.See the world-famous Eiffel Tower.D.Observe protected animals and plants3、What do the four national parks have in common?A.They have a long history.B.There are residents inside.C.They feature cheese festivals.D.There are many ancient towns.Amy, a day old, was abandoned at a police station in Seoul. Her birth parents couldn’t afford to give Amy the appropriate healthcare then. She spent her first three months in an orphanage before she was adopted. “I always thought, why should I be more thankful to my adoptive parents than the next person?” she says.In 2011, Amy reconnected with her birth mother in South Korea, her adoptive mum by her side. “My Korean mother took my American mother’s hands in hers and said with tears, ‘Thank you.’ After that, my whole world changed,” Amy says. At the time, she was working in the e-commerce sector and struggling with anxiety, depression and an eating disorder. Reconnecting with her birth family, however made her feel like the luckiest person in the world and she wanted to actively share her good fortune. That year, she quit her job and co-founded the Global Gratitude Alliance, which partners with grassroots organizations to create community-led solutions or social and economic change.Since then, a reflexive sense of thankfulness has become Amy’s frame of reference for work, relationships and daily life in general. She tried to rethink her world view, appreciate the little things and make connections with others. For Amy, the attitude shift helped her overcome health issues—she didn’t need the drugs any more after she returned from Korea. Those positive effects inspired Amy to share the experience with others. Through a partnership with a home for orphaned children in Nepal, the Global Gratitude Alliance provided teachers with workshops that concluded with a ceremony of giving thanks. The participants used those techniques to help their students and community after the destructive earthquake of 2015. Children from the school recently visited a local seniors’ home to build relationships with the residents there. “Gratitude creates a cycle of giving and receiving,” Amy says.4、What can we know from the passage?A.Amy was raised by an American couple.B.Amy received proper treatment as an infant.C.Amy was more thankful to her birth mother.D.Amy was orphaned three months after her birth.5、What played a key role in Amy’s change?A.Her job quittingB.The reunion with her birth mother.C.The struggle against her disease.D.The connections with volunteers.6、What can we know about members of the Global Gratitude Alliance?A.They hosted ceremonies in workshops.B.They sought partners for orphaned children.C.They built relations with adoptive parents.D.They contributed to post-disaster service.7、What is the text mainly about?A.Good fortune inspires people a lot.B.Reflection helps build frame of life.C.Family reunion gets positive effects.D.Gratitude needs to be widely spread.Don’t feel too bad if you’re the type to still be in bed past 11 am on a Saturday. Yes, those up-at-6 am types might look self-satisfied with their Instagram stories of sunrise yoga and morning museum trips, but it turns out that getting some extra rest at the weekend could be good for your mental well-being.Having a lie-in could halve your risk of getting depression, suggests research from Yonsei University. But researchers waned -this benefits only apply if you sleep for an extra two hours. Any more than that and you actually increase your risk.Researchers at the South Korean university came to this conclusion after tracking 5,500 people who said they oft en missed out on a full night’s sleep during the working week. They found that those who caught up on sleeping by having a lie-in of an extra two hours at the weekend were 48% less likely to develop depression. Those who had a one-hour lie-in reduced their risk of low mood by a third. But for people who slept for longer than two hours extra on Saturday and Sunday, depression rates were 16% higher.These findings are backed up by a 2018 study from Sweden, which suggested that if y could bring up your average duration of sleep by staying in bed later at the weekends, you could be in better health. What’s even better than a lie-in at the weekend, though, is not needing one. If you can increase the duration and quality of your sleep during the week thus uppi ng your overall average and reducing the need to sleep extra hours at the weekend, that’s likely to promise even more positive effects for your mental and physical well-beingIt’s still recommended that you get between seven and nine hours of sleep a n ight so make that your aim rather than pretending a lie-in erases all the damage from late nights every other day.8、What do the first 2 paragraphs mainly tell us?A.The type of staying late in bed is commonly encouraged.B.Yoga and museums trips are fashionable morning relaxation.C.An extra 2 hours’ rest could be beneficial to your mental health.D.Sleeping late for over 2 hours could cut the risk of depression in half9、What can replace the underlined words “caught up on” in bold?A.Ran after.B.Reached for.C.Made up for.D.Was lacking in.10、Why does the author use three figures in paragraph 3?A.To introduce a topic.B.To support a conclusion.C.To explain a phenomenon.D.To provide some examples.11、What is viewed as healthy style according to the Sweden study?A.Sleeping for more than nine hours per night.B.Increasing average sleeping duration per night.C.Staying late and sleep extra hours at the weekends.D.Sufficient sleep duration and quality during the weekdays.Every machine and power station, even renewable energy like wind and solar, creates waste heat that is simply lost in the atmosphere. Thankfully, scientists and engineers are devoted to collecting heat and transforming it into useful electricity. Now researchers at Penn State University have created a flexible thermoelectrie (热电的) generator that wraps around hot water or exhaust(排气) pipes, turning heat into electricity.Flexible devices are more efficient because they attach to pipes in factories or on vehicles without having to be glued on like rigid devices. Then the thermoelectric materials turn temperature differences between the surface fixed to the pipe and the cooler outer surface into electric current -called the Seebeck effectThermophotovoltaic(热光伏的)devices are another promising way to use this waste heat. University of Michigan engineers have created a precisely machined thermophotovoltaic cell that could be used to generate electricity from extra renewable power. The cells would use heat and turn it into electricity on demand, in a form that is much cheaper than batteries, say its creators.One of the factors crucial to any device’s thermoelectric efficiency is its material. If higher electrical energy can be created with smaller temperature differences, then the materials are said to have a high ZT value. Using a special material scientists have doubled the previous best. The random distribution of atoms in their material slows down the way heat passes through it, making the thermoelectric effect last longer, able to power sensors and small computer processors. Low temperature generation includes computers and cars, makingpyroelectrics(热电体) particularly useful for squeezing more energy out of electronic systems. Another relative advantage is inexpensive materials. More abundant elements like tin is cheap and abundant, with high ZTvalues when combined in the right way. Their use could lead to greener car engines.And when it comes to personal electronics, thermoelectries could eventually beat traditional charging hardware. Chinese researchers have built a wristband that gathers body heat to power a LED and may be able to power smartwatches or other mobile devices in the future.12、What is the thermoelectric generator used for?A.Reducing the air pollution.B.Introducing an ecological energy.C.Controlling the exhaust emission.D.Converting waste heat into electrical energy13、Why does the author mention the Seebeck effect in paragraph 2?A.To illustrate a point.B.To clarify a concept.C.To show a connection.D.To make a comparison.14、What factor determines any device’s thermoelectric efficiency?A.Its high ZT value.B.Its renewable power.C.Its temperature.D.Its electronic systems.15、Which potential application of thermoelectric technology is mentioned?A.To reduce waste heat.B.To make LED.C.To charge smartwatches.D.To start vehicles二、七选五16、Developing an optimistic outlook can be good for both your physical and mental health. Here are some ways to make thinking positive thoughts easy.●Spend time with positive peopleIf you surround yourself with constant complainers, their negativity is likely to rub off on you. Spend time with positive friends and family members to increase the likelihood that their positive thinking habits will become yours too. ①_____●Recognize and replace negative thoughtsYou won’t be successful at positive thinking, if you’re still stuck in frequent negative thoughts. ②_____ If you find yourself thinking something such as, “I always mess everything up”, replace it with something more realistic such as, “Sometimes I makemistakes but I learn from them.”●Consider the consequences of negativitySpend some time thinking about the consequences of negative thinking. ③_____ For example, a person who thinks, “I probably won’t get this job interview,” may put less effort into the interview. As a result, he may decrease his chances of getting the job.●Create a daily gratitude listIf you start keeping a daily gratitude list, you’ll start noticing exactly how much you have to be thankful for. ④_____ And you focus on the positive in your life instead of thinking about all the bad things that have happened in the day.●Look for silver liningWhen something bad happens, look for the silver lining. ⑤_____ While it may be difficult to find good in a tough situation, it is always there if you look hard enough. Focusing on the positive helps you to stay hopeful and optimistic even when things are tough.A.Often, it can become a self-fulfilling predictionB.This will help you look for the good in other people.C.Learn how to surround yourself with positive people.D.Your past mistakes are not there for you to hold on to.E.This means looking for the positive side of a negative event.F.Learn to recognize and replace thoughts that are overly negative.G.Generate ideas on limiting the time you spend with negative people.He has been 12 many years now. But I think of him often. I wonder if he 13 my unwillingness to be seen with him during our 14 . If he did, I am sorry I never told him how sorry I was and how I 15 it.17、fort B.attraction C.convenience D.balance18、A.struggle B.enjoy C.excite D.cry19、A.except B.despite C.for D.in20、A.forgot B.missed C.spent D.valued21、A.as if B.as long as C.even if D.in case22、A.pull B.follow C.watch D.hold23、ziness B.faultC.inconvenienceD.irresponsibility24、A.waste B.joke C.pity D.failure25、A.anger B.envy plaint D.joy26、A.road B.belief C.lesson D.standard27、A.exactly B.slightly C.finally D.greatly28、A.gone B.lost C.disappeared D.restricted29、A.imagined B.touched C.predicted D.sensed30、munication B.chatting C.walks D.lives31、A.expected B.regretted C.hated D.appreciated四、短文填空32、 Queensland is an Australian state ①_____(cover) the continent’s northeast, with a coastline stretching nearly 7,000km. Its offshore Great Barrier Reef,the world’s largest coral reef system, hosts thousands of marine ②_____ (species).Queensland is also home ③_____ some of the most magical islands and the largest expanse of coral in the world. It may well be the closest you ever get to paradise. You can ④_____ (free) while away the hours on a deserted beach full of palm trees, go for a sail around the coral reef, on throw ⑤_____ (your) into the various water sports. Spread like jewels in the Pacific Ocean, these Australian islands stretch from Lady Elliott in the south to Lizard in the north, ⑥_____ all are a delight to visit.Hayman Island ⑦_____ (position) within the heart of Australia’s Great Barrier Reef ⑧_____ (be) probably one of the most luxurious resorts in the world with dreamy beaches,unique wildlife and mouth-watering cuisine. For something a little more particular, tryBedarra, privately owned and with only sixteen villas(别墅). For a touch of history, go to Lizard Island, ⑨_____ Captain Cook landed in 1770. This is also where divers go. To get away from it all, go to Heron Island, a port of peace and quiet. Fraser Island has the ⑩_____ (large) sandy beach in the world, Hook has a wonderful National Park... the list is endless五、书面表达33、假如你是李华，你校外教Caroline发朋友圈求退烧药物你得知后寄去药品并附留言条。

人教部编版六年级语文下册名校期末冲刺培优卷02——词语、成语及应用（时间：40分钟满分：100分）班级：姓名：考号： .一、选择题。

1．下列词语中没有错别字的一项是( )A．选聘深霄至死不懈锲而不舍B．调羹绞肉锋芒毕露妇儒皆知C．谣言昼夜慷慨淋漓目不窥园D．小楷吩咐一反即往深恶痛绝2.下列加点字词的解释有误的一项是（）A.卓．有成效（高超）见微．知著（细小）B.万象更．新（变更）侃侃．．而谈（从容不迫）C.开山鼻祖．．（创始人）随．心所欲（顺从）D.锲而不舍．（居住）语．重心长（言辞）3.下列句子中加点的词语使用不恰当的一项是（）A.翘首西望，海面托着的是披着银发的苍山。

苍山如屏，洱海如镜，真是巧夺天工．．．．。

B.专家指出，日常体验式活动更能潜移默化．．．．地影响学生，帮助学生树立珍爱生命的意识，锻炼学生克服困难的意志。

C.在科学领域有所建树的人都善于从司空见惯．．．．的现象中发现问题。

D.高县长说：“全县就你一人被评为了全国劳模，无论怎样说也是凤毛麟角．．．．。

4.依次填入下面横线处的词语，最恰当的一项是（）品茶，亦可谓品历史，品文化，一盏佳茗在手，盏中是清淡的龙井，鼻端______________的茶香似有若无，思绪慢慢随着茶汤中的涟漪向悠远的中华文明____________开来。

细细地品，那浸泡在盏中的不是茶，而是滚滚红尘中偶尔_____________的一颗散淡的心。

A.缭绕荡漾歇息B.环绕荡漾栖息C.环绕飘扬歇息D.缭绕飘扬栖息5．下列加点词语使用不恰当的一项是( )A．学习任何一门才艺都要有坚定的意志，倘若见异思迁．．．．，到头来必定一事无成。

B．校庆当天，各届校友纷纷回到母校，一时间校园内外人声鼎沸．．．．，热闹非凡。

C．随着对事件的深入追踪，我们发现，真相和我们此前的猜测大相径．．．庭。

D．熟悉的歌声从窗外飘来，我忍不住手打节拍，随声附和．．．．，轻轻地哼唱起来。

6.下列词语中，加点字的读音完全相同的一项是（）A.一模．一样怪模．怪样模．棱两可B.困难重．重重．见天日重．重封锁C.无济．于事人才济．济同舟共济．D.应．接不暇得心应．手应．有尽有7.下列句子中，画线的成语使用不正确的一项是（）A.鲁滨逊被抛弃在一座可怕的荒岛上，没有重见天日的希望。

吉林省长春市名校调研重点名校2024年中考冲刺卷数学试题考生须知：1．全卷分选择题和非选择题两部分，全部在答题纸上作答。

选择题必须用2B铅笔填涂；非选择题的答案必须用黑色字迹的钢笔或答字笔写在“答题纸”相应位置上。

2．请用黑色字迹的钢笔或答字笔在“答题纸”上先填写姓名和准考证号。

3．保持卡面清洁，不要折叠，不要弄破、弄皱，在草稿纸、试题卷上答题无效。

一、选择题（本大题共12个小题，每小题4分，共48分．在每小题给出的四个选项中，只有一项是符合题目要求的．）1．如图，在三角形ABC中，∠ACB=90°，∠B=50°，将此三角形绕点C沿顺时针方向旋转后得到三角形A′B′C，若点B′恰好落在线段AB上，AC、A′B′交于点O，则∠COA′的度数是（）A．50°B．60°C．70°D．80°2．在直角坐标系中，已知点P（3，4），现将点P作如下变换：①将点P先向左平移4个单位，再向下平移3个单位得到点P1；②作点P关于y轴的对称点P2；③将点P绕原点O按逆时针方向旋转90°得到点P3，则P1，P2，P3的坐标分别是（）A．P1（0，0），P2（3，﹣4），P3（﹣4，3）B．P1（﹣1，1），P2（﹣3，4），P3（4，3）C．P1（﹣1，1），P2（﹣3，﹣4），P3（﹣3，4）D．P1（﹣1，1），P2（﹣3，4），P3（﹣4，3）3．多项式ax2﹣4ax﹣12a因式分解正确的是（）A．a（x﹣6）（x+2）B．a（x﹣3）（x+4）C．a（x2﹣4x﹣12）D．a（x+6）（x﹣2）4．函数22ayx--=（a为常数）的图像上有三点17()2y-，，21()2y-，，33()2y，，则函数值123,,y y y的大小关系是（）A．y3＜y1＜y2B．y3＜y2＜y1C．y1＜y2＜y3D．y2＜y3＜y15．如图，点A为∠α边上任意一点，作AC⊥BC于点C，CD⊥AB于点D，下列用线段比表示cosα的值，错误的是（）A ．CDACB ．BCABC ．BDBCD ．ADAC6．若函数2m y x+=的图象在其象限内y 的值随x 值的增大而增大，则m 的取值范围是（ ） A ．m ＞﹣2 B ．m ＜﹣2 C ．m ＞2D ．m ＜27．一个布袋内只装有1个黑球和2个白球,这些球除颜色不同外其余都相同,随机摸出一个球后放回搅匀,再随机摸出一个球,则两次摸出的球都是黑球的概率是( ) A ．49B ．13C ．16D ．198．2018年，我国将加大精准扶贫力度，今年再减少农村贫困人口1000万以上，完成异地扶贫搬迁280万人．其中数据280万用科学计数法表示为( ) A ．2.8×105B ．2.8×106C ．28×105D ．0.28×1079．1．桌面上放置的几何体中，主视图与左视图可能不同的是( ) A ．圆柱 B ．正方体 C ．球 D ．直立圆锥 10．计算33x x x-+的结果是（ ） A ．6x x+ B ．6x x- C ．12D ．111．如图，数轴上的,,A B C 三点所表示的数分别为a b c 、、，其中AB BC =，如果||||||a c b >>那么该数轴的原点O 的位置应该在（ ）A ．点A 的左边B ．点A 与点B 之间C ．点B 与点C 之间D ．点C 的右边12．下列计算正确的是( ) A ．a 2•a 3＝a 6B ．(a 2)3＝a 6C ．a 2+a 2＝a 3D ．a 6÷a 2＝a 3 二、填空题：（本大题共6个小题，每小题4分，共24分．） 13．如图，已知，第一象限内的点A 在反比例函数y ＝2x的图象上，第四象限内的点B 在反比例函数y ＝k x 的图象上．且OA ⊥OB ，∠OAB ＝60°，则k 的值为_________．14．同时掷两粒骰子，都是六点向上的概率是_____．15．如图，点A，B在反比例函数y＝1x(x＞0)的图象上，点C，D在反比例函数y＝kx(k＞0)的图象上，AC∥BD∥y轴，已知点A，B的横坐标分别为1，2，△OAC与△ABD的面积之和为32，则k的值为_____．16．有一枚质地均匀的骰子，六个面分别表有1到6的点数，任意将它抛掷两次，并将两次朝上面的点数相加，则其和小于6的概率是______．17．a、b、c是实数，点A（a+1、b）、B（a+2，c）在二次函数y=x2﹣2ax+3的图象上，则b、c的大小关系是b____c （用“＞”或“＜”号填空）18．将两块全等的含30°角的三角尺如图1摆放在一起，设较短直角边为1，如图2，将Rt△BCD沿射线BD方向平移，在平移的过程中，当点B的移动距离为时，四边ABC1D1为矩形；当点B的移动距离为时，四边形ABC1D1为菱形．三、解答题：（本大题共9个小题，共78分，解答应写出文字说明、证明过程或演算步骤．19．（6分）地下停车场的设计大大缓解了住宅小区停车难的问题，如图是龙泉某小区的地下停车库坡道入口的设计示意图，其中，AB⊥BD，∠BAD＝18°，C在BD上，BC＝0.5m．根据规定，地下停车库坡道入口上方要张贴限高标志，以便告知驾驶员所驾车辆能否安全驶入．小刚认为CD的长就是所限制的高度，而小亮认为应该以CE的长作为限制的高度．小刚和小亮谁说得对？请你判断并计算出正确的限制高度．（结果精确到0.1m，参考数据：sin18°≈0.31，cos18°≈0.95，tan18°≈0.325）20．（6分）为了落实国务院的指示精神，某地方政府出台了一系列“三农”优惠政策，使农民收入大幅度增加．某农户生产经销一种农产品，已知这种产品的成本价为每千克20元，市场调查发现，该产品每天的销售量y（千克）与销售价x（元/千克）有如下关系：y=﹣2x+1．设这种产品每天的销售利润为w元．求w与x之间的函数关系式．该产品销售价定为每千克多少元时，每天的销售利润最大？最大利润是多少元？如果物价部门规定这种产品的销售价不高于每千克28元，该农户想要每天获得150元的销售利润，销售价应定为每千克多少元？21．（6分）解不等式：3x﹣1＞2（x﹣1），并把它的解集在数轴上表示出来．22．（8分）为进一步深化基教育课程改革，构建符合素质教育要求的学校课程体系，某学校自主开发了A书法、B阅读，C足球，D器乐四门校本选修课程供学生选择，每门课程被选到的机会均等．学生小红计划选修两门课程，请写出所有可能的选法；若学生小明和小刚各计划送修一门课程，则他们两人恰好选修同一门课程的概率为多少？23．（8分）如图，AB为⊙O的直径，点D、E位于AB两侧的半圆上，射线DC切⊙O于点D，已知点E是半圆弧AB上的动点，点F是射线DC上的动点，连接DE、AE，DE与AB交于点P，再连接FP、FB，且∠AED＝45°．（1）求证：CD∥AB；（2）填空：①当∠DAE＝时，四边形ADFP是菱形；②当∠DAE＝时，四边形BFDP是正方形．24．（10分）甲、乙两人分别站在相距6米的A、B两点练习打羽毛球，已知羽毛球飞行的路线为抛物线的一部分，甲在离地面1米的C处发出一球，乙在离地面1.5米的D处成功击球，球飞行过程中的最高点H与甲的水平距离AE 为4米，现以A为原点，直线AB为x轴，建立平面直角坐标系（如图所示）．求羽毛球飞行的路线所在的抛物线的表达式及飞行的最高高度．25．（10分）班级的课外活动，学生们都很积极.梁老师在某班对同学们进行了一次关于“我喜爱的体育项目”的调査，下面是他通过收集数据后，绘制的两幅不完整的统计图.请根据图中的信息，解答下列问题：(1)调查了________名学生； (2)补全条形统计图；(3)在扇形统计图中，“乒乓球”部分所对应的圆心角度数为________；(4)学校将举办运动会，该班将推选5位同学参加乒乓球比赛，有3位男同学(,,)A B C 和2位女同学(,)D E ，现准备从中选取两名同学组成双打组合，用树状图或列表法求恰好选出一男一女组成混合双打组合的概率.26．（12分）一艘观光游船从港口A 以北偏东60°的方向出港观光，航行80海里至C 处时发生了侧翻沉船事故，立即发出了求救信号，一艘在港口正东方向的海警船接到求救信号，测得事故船在它的北偏东37°方向，马上以40海里每小时的速度前往救援，求海警船到大事故船C 处所需的大约时间．（温馨提示：sin53°≈0.8，cos53°≈0.6）27．（12分）先化简：21111xx x ⎛⎫-÷ ⎪+-⎝⎭，再请你选择一个合适的数作为x 的值代入求值．参考答案一、选择题（本大题共12个小题，每小题4分，共48分．在每小题给出的四个选项中，只有一项是符合题目要求的．）1、B【解题分析】试题分析：∵在三角形ABC中，∠ACB=90°，∠B=50°，∴∠A=180°﹣∠ACB﹣∠B=40°．由旋转的性质可知：BC=B′C，∴∠B=∠BB′C=50°．又∵∠BB′C=∠A+∠ACB′=40°+∠ACB′，∴∠ACB′=10°，∴∠COA′=∠AOB′=∠OB′C+∠ACB′=∠B+∠ACB′=60°．故选B．考点：旋转的性质．2、D【解题分析】把点P的横坐标减4，纵坐标减3可得P1的坐标；让点P的纵坐标不变，横坐标为原料坐标的相反数可得P2的坐标；让点P的纵坐标的相反数为P3的横坐标，横坐标为P3的纵坐标即可．【题目详解】∵点P（3，4），将点P先向左平移4个单位，再向下平移3个单位得到点P1，∴P1的坐标为（﹣1，1）．∵点P关于y轴的对称点是P2，∴P2（﹣3，4）．∵将点P绕原点O按逆时针方向旋转90°得到点P3，∴P3（﹣4，3）．故选D．【题目点拨】本题考查了坐标与图形的变化；用到的知识点为：左右平移只改变点的横坐标，左减右加，上下平移只改变点的纵坐标，上加下减；两点关于y轴对称，纵坐标不变，横坐标互为相反数；（a，b）绕原点O按逆时针方向旋转90°得到的点的坐标为（﹣b，a）．3、A【解题分析】试题分析：首先提取公因式a，进而利用十字相乘法分解因式得出即可．解：ax2﹣4ax﹣12a=a（x2﹣4x﹣12）=a（x﹣6）（x+2）．故答案为a（x﹣6）（x+2）．点评：此题主要考查了提取公因式法以及十字相乘法分解因式，正确利用十字相乘法分解因式是解题关键．4、A【解题分析】试题解析：∵函数y＝2-2ax-（a为常数）中，-a1-1＜0，∴函数图象的两个分支分别在二、四象限，在每一象限内y随x的增大而增大，∵32＞0，∴y3＜0；∵-72＜-12，∴0＜y1＜y1，∴y3＜y1＜y1．故选A．5、D【解题分析】根据锐角三角函数的定义，余弦是邻边比斜边，可得答案．【题目详解】cosα=BD BC CD BC AB AC==.故选D.【题目点拨】熟悉掌握锐角三角函数的定义是关键.6、B【解题分析】根据反比例函数的性质，可得m+1＜0，从而得出m的取值范围．【题目详解】∵函数2myx+=的图象在其象限内y的值随x值的增大而增大，∴m+1＜0，解得m＜-1．故选B．7、D【解题分析】试题分析：列表如下由表格可知，随机摸出一个球后放回搅匀，再随机摸出一个球所以的结果有9种，两次摸出的球都是黑球的结果有1种，所以两次摸出的球都是黑球的概率是19．故答案选D ． 考点：用列表法求概率． 8、B 【解题分析】分析：科学记数法的表示形式为10n a ⨯的形式，其中110a ≤<，n 为整数．确定n 的值时，要看把原数变成a 时，小数点移动了多少位，n 的绝对值与小数点移动的位数相同．当原数绝对值>1时，n 是正数；当原数的绝对值<1时，n 是负数．详解：280万这个数用科学记数法可以表示为62.810，⨯ 故选B.点睛：考查科学记数法，掌握绝对值大于1的数的表示方法是解题的关键. 9、B【解题分析】试题分析：根据从正面看得到的视图是主视图，从左边看得到的图形是左视图，从上面看得到的图形是俯视图，正方体主视图与左视图可能不同，故选B ． 考点：简单几何体的三视图． 10、D 【解题分析】根据同分母分式的加法法则计算可得结论． 【题目详解】33x x x -+=33x x -+=xx=1． 故选D ． 【题目点拨】本题考查了分式的加减法，解题的关键是掌握同分母分式的加减运算法则． 11、C 【解题分析】根据绝对值是数轴上表示数的点到原点的距离，分别判断出点A 、B 、C 到原点的距离的大小，从而得到原点的位置，即可得解． 【题目详解】 ∵|a|＞|c|＞|b|，∴点A 到原点的距离最大，点C 其次，点B 最小， 又∵AB=BC ，∴原点O 的位置是在点B 、C 之间且靠近点B 的地方． 故选：C ． 【题目点拨】此题考查了实数与数轴，理解绝对值的定义是解题的关键． 12、B 【解题分析】试题解析：A.235,a a a ⋅=故错误. B.正确.C.不是同类项，不能合并，故错误.D.624.a a a ÷= 故选B.点睛：同底数幂相乘，底数不变,指数相加. 同底数幂相除，底数不变,指数相减.二、填空题：（本大题共6个小题，每小题4分，共24分．） 13、-6 【解题分析】如图，作AC ⊥x 轴，BD ⊥x 轴， ∵OA ⊥OB ，∴∠AOB=90°，∵∠OAC+∠AOC=90°，∠AOC+∠BOD=90°，∴∠OAC=∠BOD，∴△ACO∽△ODB，∴OA OC AC OB BD OD==，∵∠OAB=60°，∴33 OAOB=，设A（x，2x ），∴BD=3OC=3x，OD=3AC=23x，∴B（3x，-23x），把点B代入y=kx得，-23x=3kx，解得k=-6，故答案为-6.14、1 36．【解题分析】同时掷两粒骰子，一共有6×6=36种等可能情况，都是六点向上只有一种情况，按概率公式计算即可. 【题目详解】解：都是六点向上的概率是1 36.【题目点拨】本题考查了概率公式的应用.15、1【解题分析】过A 作x 轴垂线，过B 作x 轴垂线，求出A （1，1），B （2，12），C （1，k ），D （2，2k ），将面积进行转换S △OAC ＝S △COM ﹣S △AOM ，S △ABD ＝S 梯形AMND ﹣S 梯形AAMNB 进而求解．【题目详解】解：过A 作x 轴垂线，过B 作x 轴垂线，点A ，B 在反比例函数y ＝1x （x ＞0）的图象上，点A ，B 的横坐标分别为1，2， ∴A （1，1），B （2，12）， ∵AC ∥BD ∥y 轴，∴C （1，k ），D （2，2k ）， ∵△OAC 与△ABD 的面积之和为32， 111112222OAC COM AOM k S S S k ∴=-=⨯-⨯⨯=-， S △ABD ＝S 梯形AMND ﹣S 梯形AAMNB 1k 11k 1111122224-⎛⎫⎛⎫=+⨯-⨯+⨯= ⎪ ⎪⎝⎭⎝⎭， 1132242k k -∴-+=， ∴k ＝1，故答案为1．【题目点拨】本题考查反比例函数的性质，k 的几何意义．能够将三角形面积进行合理的转换是解题的关键．16、518【解题分析】列举出所有情况，看两个骰子向上的一面的点数和小于6的情况占总情况的多少即可．【题目详解】解：列表得：∴两个骰子向上的一面的点数和小于6的有10种，则其和小于6的概率是105 3618=，故答案为：5 18．【题目点拨】本题考查了列表法与树状图法，列表法可以不重复不遗漏的列出所有可能的结果，适合于两步完成的事件.树状图法适用于两步或两步以上完成的事件.解题时还要注意是放回实验还是不放回实验.用到的知识点为：概率=所求情况数与总情况数之比．17、＜【解题分析】试题分析：将二次函数y＝x2－2ax＋3转换成y＝(x-a)2-a2＋3,则它的对称轴是x=a,抛物线开口向上，所以在对称轴右边y随着x的增大而增大，点A点B均在对称轴右边且a+1<a+2,所以b<c.18、33,3．【解题分析】试题分析：当点B的移动距离为33时，∠C1BB1=60°，则∠ABC1=90°，根据有一直角的平行四边形是矩形，可判定四边形ABC1D1为矩形；当点B的移动距离为3时，D、B1两点重合，根据对角线互相垂直平分的四边形是菱形，可判定四边形ABC1D1为菱形．试题解析：如图：当四边形ABC1D是矩形时，∠B1BC1=90°﹣30°=60°，∵B1C1=1，∴BB 1=1113tan 6033B C ==︒， 当点B 的移动距离为33时，四边形ABC 1D 1为矩形； 当四边形ABC 1D 是菱形时，∠ABD 1=∠C 1BD 1=30°，∵B 1C 1=1，∴BB 1=1113tan 3033B C ==︒， 当点B 的移动距离为3时，四边形ABC 1D 1为菱形．考点：1．菱形的判定；2．矩形的判定；3．平移的性质．三、解答题：（本大题共9个小题，共78分，解答应写出文字说明、证明过程或演算步骤．19、小亮说的对，CE 为2.6m ．【解题分析】先根据CE ⊥AE ,判断出CE 为高,再根据解直角三角形的知识解答．【题目详解】解：在△ABD 中,∠ABD ＝90°,∠BAD ＝18°,BA ＝10m, ∵tan ∠BAD ＝，∴BD ＝10×tan18°,∴CD ＝BD ﹣BC ＝10×tan18°﹣0.5≈2.7（m ）,在△ABD 中,∠CDE ＝90°﹣∠BAD ＝72°, ∵CE ⊥ED ,∴sin ∠CDE ＝,∴CE ＝sin ∠CDE ×CD ＝sin72°×2.7≈2.6（m ）, ∵2.6m ＜2.7m,且CE ⊥AE ,∴小亮说的对．答：小亮说的对,CE 为2.6m ．【题目点拨】本题主要考查了解直角三角形的应用,主要是正弦、正切概念及运算,解决本题的关键把实际问题转化为数学问题. 20、 (1)2w 2x 120x 1600=-+-;(2) 该产品销售价定为每千克30元时，每天销售利润最大，最大销售利润2元;(3)该农户想要每天获得150元的销售利润，销售价应定为每千克25元．【解题分析】（1）根据销售额=销售量×销售价单x ，列出函数关系式．（2）用配方法将（2）的函数关系式变形，利用二次函数的性质求最大值．（3）把y=150代入（2）的函数关系式中，解一元二次方程求x ，根据x 的取值范围求x 的值．【题目详解】解：（1）由题意得：()()()2w x 20y x 202x 802x 120x 1600=-⋅=--+=-+-， ∴w 与x 的函数关系式为：2w 2x 120x 1600=-+-．（2）()22w 2x 120x 16002x 30200=-+-=--+，∵﹣2＜0，∴当x=30时，w 有最大值．w 最大值为2．答：该产品销售价定为每千克30元时，每天销售利润最大，最大销售利润2元．（3）当w=150时，可得方程﹣2（x ﹣30）2+2=150，解得x 1=25，x 2=3．∵3＞28，∴x 2=3不符合题意，应舍去．答：该农户想要每天获得150元的销售利润，销售价应定为每千克25元．21、1x -＞【解题分析】试题分析：按照解一元一次不等式的步骤解不等式即可.试题解析：3122x x --＞, 3221x x ＞--+,1x -＞.解集在数轴上表示如下点睛：解一元一次不等式一般步骤：去分母，去括号，移项，合并同类项，把系数化为1.22、（1）答案见解析；（2）14【解题分析】分析：（1）直接列举出所有可能的结果即可.（2）画树状图展示所有16种等可能的结果数，再找出他们两人恰好选修同一门课程的结果数，然后根据概率公式求解．详解：（1）学生小红计划选修两门课程，她所有可能的选法有：A书法、B阅读；A书法、C足球；A书法、D器乐；B阅读，C足球；B阅读，D器乐；C足球，D器乐.共有6种等可能的结果数；（2）画树状图为：共有16种等可能的结果数，其中他们两人恰好选修同一门课程的结果数为4，所以他们两人恰好选修同一门课程的概率41. 164 ==点睛：本题考查了列表法与树状图法：利用列表法或树状图法展示所有等可能的结果n，再从中选出符合事件A或B 的结果数目m，然后利用概率公式计算事件A或事件B的概率．23、（1）详见解析；（2）①67.5°；②90°．【解题分析】（1）要证明CD∥AB，只要证明∠ODF＝∠AOD即可，根据题目中的条件可以证明∠ODF＝∠AOD，从而可以解答本题；（2）①根据四边形ADFP是菱形和菱形的性质，可以求得∠DAE的度数；②根据四边形BFDP是正方形，可以求得∠DAE的度数．【题目详解】（1）证明：连接OD，如图所示，∵射线DC切⊙O于点D，∴OD⊥CD，即∠ODF＝90°，∵∠AED＝45°，∴∠AOD＝2∠AED＝90°，∴∠ODF＝∠AOD，∴CD∥AB；（2）①连接AF与DP交于点G，如图所示，∵四边形ADFP是菱形，∠AED＝45°，OA＝OD，∴AF⊥DP，∠AOD＝90°，∠DAG＝∠PAG，∴∠AGE＝90°，∠DAO＝45°，∴∠EAG＝45°，∠DAG＝∠PEG＝22.5°，∴∠EAD＝∠DAG+∠EAG＝22.5°+45°＝67.5°，故答案为：67.5°；②∵四边形BFDP是正方形，∴BF＝FD＝DP＝PB，∠DPB＝∠PBF＝∠BFD＝∠FDP＝90°，∴此时点P与点O重合，∴此时DE是直径，∴∠EAD＝90°，故答案为：90°．【题目点拨】本题考查菱形的判定与性质、切线的性质、正方形的判定，解答本题的关键是明确题意，找出所求问题需要的条件，利用菱形的性质和正方形的性质解答．24、53米.【解题分析】先求抛物线对称轴，再根据待定系数法求抛物线解析式，再求函数最大值. 【题目详解】由题意得：C（0，1），D（6，1.5），抛物线的对称轴为直线x=4，设抛物线的表达式为：y=ax2+bx+1（a≠0），则据题意得：421.53661baa b⎧-=⎪⎨⎪=++⎩，解得：12413ab⎧=-⎪⎪⎨⎪=⎪⎩，∴羽毛球飞行的路线所在的抛物线的表达式为：y=﹣124x2+13x+1，∵y=﹣124（x﹣4）2+53，∴飞行的最高高度为：53米．【题目点拨】本题考核知识点：二次函数的应用. 解题关键点：熟记二次函数的基本性质.25、50 见解析（3）115.2° (4)3 5【解题分析】试题分析：（1）用最喜欢篮球的人数除以它所占的百分比可得总共的学生数;（2）用学生的总人数乘以各部分所占的百分比,可得最喜欢足球的人数和其他的人数,即可把条形统计图补充完整; （3）根据圆心角的度数=360 º×它所占的百分比计算;（4）列出树状图可知，共有20种等可能的结果，两名同学恰为一男一女的有12种情况，从而可求出答案.解：（1）由题意可知该班的总人数=15÷30%=50（名）故答案为50；（2）足球项目所占的人数=50×18%=9（名），所以其它项目所占人数=50﹣15﹣9﹣16=10（名）补全条形统计图如图所示：（3）“乒乓球”部分所对应的圆心角度数=360°×=115.2°，故答案为115.2°；（4）画树状图如图．由图可知，共有20种等可能的结果，两名同学恰为一男一女的有12种情况，所以P（恰好选出一男一女）==．点睛：本题考查的是条形统计图和扇形统计图的综合运用，概率的计算.读懂统计图,从不同的统计图中得到必要的信息及掌握概率的计算方法是解决问题的关键.26、54小时【解题分析】过点C作CD⊥AB交AB延长线于D．先解Rt△ACD得出CD=AC=40海里，再解Rt△CBD中，得出BC=≈50，然后根据时间=路程÷速度即可求出海警船到大事故船C处所需的时间．【题目详解】解：如图，过点C作CD⊥AB交AB延长线于D．在Rt△ACD中，∵∠ADC=90°，∠CAD=30°，AC=80海里，∴CD=AC=40海里．在Rt△CBD中，∵∠CDB=90°，∠CBD=90°﹣37°=53°，∴BC=≈=50（海里），∴海警船到大事故船C处所需的时间大约为：50÷40=（小时）．考点：解直角三角形的应用-方向角问题27、x﹣1，1．【解题分析】先通分计算括号里的，再计算括号外的，最后根据分式性质，找一个恰当的数2（此数不唯一）代入化简后的式子计算即可．【题目详解】解：原式＝(1)(1)1xxxxx++⨯－＝x﹣1，根据分式的意义可知，x≠0，且x≠±1，当x＝2时，原式＝2﹣1＝1．【题目点拨】本题主要考查分式的化简求值，化简过程中要注意运算顺序，化简结果是最简形式，难点在于当未知数的值没有明确给出时，所选取的未知数的值必须使原式的各分式都有意义，且除数不能为零．。

2024届山西省左玉县市级名校初中语文毕业考试模拟冲刺卷考生须知：1．全卷分选择题和非选择题两部分，全部在答题纸上作答。

选择题必须用2B铅笔填涂；非选择题的答案必须用黑色字迹的钢笔或答字笔写在“答题纸”相应位置上。

2．请用黑色字迹的钢笔或答字笔在“答题纸”上先填写姓名和准考证号。

3．保持卡面清洁，不要折叠，不要弄破、弄皱，在草稿纸、试题卷上答题无效。

一、积累1．下列句子没有语病．．．．的一项是（）A．我市文明办开展与策划的“经典诵读”活动，有利于更多的人了解、研究国学经典。

B．有数据显示，随着生态持续优化，空气质量不断改进，十堰的蓝天成了常态。

C．当参加“国际青少年网球巡回赛”的体育明星来到我市，受到了球迷的热烈欢迎。

D．为积极响应我市“外修生态，内修人文”方略，市五创办、市环保局联合举行了以“践行文明之约，共享生态之美”为主题的大型公益活动。

2．下列各句中，标点符号使用不正确．．．的一项是A．我的球衣被人剥了下来，又有人替我穿上了另一件——上面印着1000的号码。

B．花朵的红色是热情的色彩，它强烈，奔放，令人精神振奋。

C．“他们是电器公司设的门市部”。

鲁智胜说，“我爸认识他们的头儿。

”D．“那里面有个江姐……”她本来不紧张，但看他这样不自在，声音也有点不自然了。

3．下列加点成语使用不正确的一项是（）A．粉丝们对这场演出如痴如醉，歌手的表演堪称天衣无缝．．．．。

B．企业家们将要开发新项目，附近的村民对此望眼欲穿．．．．。

C．小明被评为“市级三好学生”，这个称号当之无愧．．．．。

D．小明在市里取得了作文大赛一等奖，他重蹈覆辙．．．．，又在省里面得了大奖。

4．下列句子中加点成语使用不恰当．．．的一项是（）A．在教育系统新春茶话会上，市局领导与教师代表们谈笑风生．．．．，其乐融融。

B．城乡医疗制度改革需要循序渐进．．．．地推进，操之过急只会适得其反。

C．市博物馆用一组栩栩如生．．．．的蜡像生动地展示了柳州多民族聚居的风貌。