【精编】上海外国语大学附属外国语学校2019-2020学年八年级上学期期中考试英语试题(扫描版).doc
2019-2020学年上海外国语大学附属外国语学校初中部高三英语期中试题及参考答案
2019-2020学年上海外国语大学附属外国语学校初中部高三英语期中试题及参考答案第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项AIt looks like 2017 is shaping up to be a record-breaking year in movie History. Here is a list of some of the year’s biggest blockbusters so far.Kong: Skull IslandA reboot (重启) of King Kong would normally get laughed at in this day and age, but it looks like this modem version of the story will be worth watching. With US actress Brie Larson and UK actor Tom Hiddleston in the mix, this film is set to be this year’s biggest monster tale.Release Date:3/10/17Beauty and the BeastDirector Bill Condon is bringing back a part of our childhood in live action, complete with the songs we all remember and love. With British stars Emma Watson and Dan Stevens leading thecast, the classic Walt Disney story already sounds like it’ll be a delight for both children and adults.Release Date:3/17/17The Fate of the FuriousThere was doubt that we’d even get a Fast 8, especially after the fitting ending US actor Paul Walker’s character was given at the end of Furious 7. Fans thought they’d never see Dom and the rest of the crew back in action, but thankfully, US star Vin Diesel himself confirmed that The Fate of the Furious is fueling up for another go.Release Date:4/14/17Spider-Man: HomecomingSpider Man is heading home to Marvel Studios for the first time. The movie will show us Peter Parker’s high school days, and will continue the threads we saw formed during his initial appearance in Captain America: Civil War. We know that Michael Keaton is playing The Vulture in this story, and that both Happy Hogan and Tony Stark, played by US actors Jon Favreau and Robert Downey Jr., are along for the ride.Release Date:7/7/171.Which of the following movies can’t you see on May Day?A.Kong: Skull Island.B.Beauty and the Beast.C.The Fate of the Furious.D.Spider-Man: Homecoming.2.What can we know about Beauty and the Beast?A.It is fueling up for another go.B.It is produced by Marvel StudiosC.It’ll show us Peter Parker’s school days.D.It’ll be enjoyable for both children and adults.3.What does the underlined word “cast” probably mean?A.Characters.B.Actors.C.Directors.D.Teachers.BCalifornia's August Complex Fire tore through more than 1,600 square miles of forest last summer,burning nearly every tree in its path. It was the largest wildfire in the state's recorded history, breaking the record previously set in 2018. After the fire, land managers must determine where to most efficiently plant new trees.A predictive mapping model called the Postfire Spatial Conifer Restoration Planning Tool recently described in Ecological Applications could inform these decisions, saving time and expense. The tool can “show where young trees are needed most, where the forest isn't going to come back on its own, where we need to intervene（干预）if we want to maintain forests," says lead author Joseph Stewart, an ecologist at the University of California, Davis.To develop the model, Stewart and his colleagues classified data collected from more than 1,200 study plots in 19 areas that burned between 2004 and 2012. They combined these data with information on rainfall, geography, climate, forest composition and bum severity.Theyalso included how many seeds sample conifer trees （针叶树）produced in 216locations over 18 years, assessing whether the trees release different numbers of seeds after a fire.The tool's potential benefits are significant, says Kimberley Davis, a conservation scientist at theUniversityofMontana, who was not involved in the study. Those managers will still have to make hard decisions, such as which species to plant in areas that may experience warmer and drier conditions resulting from climate change, but the model provides some research-based guidance to help the forests recover.4. What challenge do land managers face after the wildfire?A. Lack of wood supplies.B. Where to plant new trees best.C. How to save the burned trees.D. Loss of trees and wild animals.5. What's the main idea of paragraph 2?A. The function of the tool.B. The disadvantages of the tool.C. The improvement of the tool.D. The development of the tool.6. What does the underlined word "They" refer to?A. The study plots.B. The data.C. Stewart and his colleagues.D. The seeds.7. What isDavis' attitude towards the tool?A. Skeptical.B. Ambiguous.C. Tolerant.D. Optimistic.CDragon boating is a team sport that has its root in ancient China. The boats are decorated with a dragon head and tail. In recent years cancer survivor groups have got involved in the sport to help make friends and help rebuild their lives.On a recent Saturday morning, a group of 20 women were on a boat in the Anacostia River in Washington DC. They moved their paddles(船桨)in rhythm to the call of a coach. The women belong to the dragon boat team GoPink! DC, which trains weekly. It also races against other breast cancer survivor teams in dragon boat festivals. As a result, GoPink! DC won medals in this Washington dragon boat festival.Lydia Collins joined five years ago after finding out she had breast cancer. “I was diagnosed with breast cancer.I was demoralized because of my illness - I lost all interest in life and wouldn't even get out of bed to eat. But now I love the team spirit. I just love everything about it. It is like a floating support group on the water.”The paddles are breast cancer survivors and their supporters. Annette Rothemel helped establish(建立)the group in 2006. She is a researcher with the National Institutes of Health as well as a breast cancer survivor. “It is sort of an easy entry sport because on the same boat people at different levels can be doing the same sport.” But Ms Rothemel saysdragon boating can be physically demanding, especially for someone who is sick and getting treatment for cancer.“It’s hard but I think you have to challenge yourself in life. This is something I look forward to. I get to be outhere with my sisters and supporters that understand what I’m going through and help motivate me. So it makes me stronger and it makes me feel better,” another cancer survivor Rhonda Hartzel said.Annette Rothemel says the cancer survivors feel a sense of sisterhood and share good times when they paddle together. She says both feelings are treasured by the team.8. What do the underline wordsdemoralizedIn para.3 probably mean?A. depressedB. anxiousC. astonishedD. awkward9. What can we know about Lydia Collims from the text?A. she helps establish Go Pink !DCB. she tries to find a cure for the cancerC. she benefits from the dragon boat raceD. she gives up hope because of her illness10. How can the dragon boat race help the cancer survivorsA. forget their tough experiencesB. recover physically and mentallyC. get rid of the pains of their cancerD. enjoy their rest life without sufferings11. What does the text tell us about Annette Rothemel?A. she is an expert in studying the cause of the cancerB. she helps the cancer survivors in financial difficultiesC. she believes there is a healthful result from the dragon boat raceD. she thinks it unwise for the patient to join in the dragon boat raceDThe race skywards began inAmerica. In the late1800s, industrialization had driven urban populations and land prices up, making tall buildings increasingly cost-effective, according to Carol Willis, director of theSkyscraperMuseuminNew York, “The very first tall buildings were office buildings that concentrated a work force, piled one on top of the other in order to make business very efficient, ”she says.Like all major changes in architecture, the trend wasunderpinnedby engineering. The development of steel framework, which could be used instead of load-bearing stones, made it easier and cheaper to build tall. The coming of the elevator, meanwhile, made living on higher floors far more convenient.Though similar in shape, today's skyscrapers (摩天大楼) look little like those built in the first half of the20thcentury. This is mostly thanks to architecture's next major technological shift：the curtain wall.Postwar developments in manufacturing meant that huge panes of glass could be produced quickly and uniformly, and glass windows soon became the front of choice for high-rises. As well as allowing for greater floor space and more natural light, glass exteriors (外部) help. buildings resist greater windloads.There are now 191 completed skyscrapers that are at least 300 meters tall. But that doesn't mean our cities will grow taller indefinitely. While each additional story adds sellable floor space, construction costs also rise. All buildings reach a point where adding an extra floor will cost more money than it brings.“Every city wants to have this landmark that gives that sense of distinct culture, ”but it also needs places for people to live and work in urban settings“without the city sprawling (无序扩张), ”explains Hong Kong architect Simon Chan.The next big challenge facing architects goes beyond height：At a time when buildings and their construction account for more than a third of the world's energy consumption and contribute about 40% of greenhouse gas emissions(排放), there are new costs to consider.Whether it's employing more energy-efficient materials, encouraging natural air or using buildings themselves to generate solar or wind energy, reducing carbon emissions is the new frontier for many skyscraper architects.12. What does the underlined word“underpinned” in paragraph 2 probably mean?A. Created.B. Prepared.C. Suggested.D. Supported.13. What made living on higher floors much more convenient?A. The development of steel framework.B. Load-bearing stones.C. The use of the elevator.D. The curtain wall.14. What can we know from paragraph 5?A. Our cities will grow taller definitely.B. All skyscrapers are at least 300 meters tall.C. Construction cost rises as the stories increase.D. The profit for builders will be greater as the building becomes higher.15. What's the next big challenge facing architects?A. How to build the greenest building.B. How to build the strongest building.C. How to build the tallest building in the world.D. How to build the most comfortable building.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
2019-2020学年上海外国语大学秀洲外国语学校八年级上期中英语试卷
2019-2020学年第一学期八年级期中考试英语试题卷In front of my daughter Lingling，was a bowl full of noodles．She didn't like noodles．I saw her（26）___ there quietly with tears in her eyes．"Lingling，why don't you （27）___some？"Lingling wiped（擦去）her tears as （28）___ as possible with the back of her hand．""OK，Dad．But if I eat it all，will you promise（承诺）me one thing？""OK，no （29）___．"（30）___ she began to eat．It took her about half an hour to finish the （31）___．Then she came up to me and told me she wanted to have her hair cut!"Lingling，why don't you （32）___something else？If we see no hair on your head，we will be （33）___．"I said．"But，Dad，you promised!"I had to keep my promise．Lingling had all her hair cut off．She looks （34）___beautiful than before．（35）___Monday morning，I took her to school．Just when we arrived，a boy got out of a car．Guess what？The boy had （36）___ hair，either．"Sir，your daughter is （37）___!"a man got out of the car and said，"That boy is my son，Tom．He has cancer（癌症）．He lost his hair （38）___he got ill．Lingling cut hers off，so Tom felt less （39）___．She is a special girl．"I stood for a while．My little girl （40）___me how selfless（无私）real love is!答案：16-20 DBDBA;21-25 CBDDA;26-30 BBDBA三．阅读理解A31.Who is invited to the dinner?A.The club’s presidentB.Members of the Chicago Yacht Club.B. A volunteer and his or her guest. D.Anyone who wants to join the club32.If you want to attend the dinner, you should decide before.A.April 4B. April20C.April27D.May1答案：31-32BBBWe know that penguins live in Antarctica. Who else live there? Scientists!Every year, scientists from all over the world go to Antarctica.But where do they live?They stay in research stations.That’s because it is very cold in Antarctica. About 98% of its land is covered in ice.On Feb20,1985,China opened its first Antarctic station-the Great Wall Station.Chinese scientists can live and do scientific studies at the station.After the Great Wall Station ,China built another three stations in Antarctica - Zhongshan in 1989,Kunlun in 2009 and Taishan in 2014.The country is now building its fifth research station.It will open in 2022.33.What do we know about research stations in Antarctica?A.They let scientists do their work.B.There are no animals living there.C.There are only Chinese stations in Antarctica.D.It is not cold near the stations.34.How many Chinese research stations are there in Antarctica now?A.ThreeB.FourC.FiveD.Six答案：33-34ABCThe train started moving. There were many people of all ages. Most of them were working men and women and young college boys and girls. Near the window sat an old man with his son, he looked about thirty years old.As the train moved, the son was happy because he was very excited at the scenery outside. He said in a high voice, "See, Dad, the green trees and the scenery are very beautiful!" It made the other people feel very strange. Everyone started talking in a low voice about the old man's son. A few minutes later it started raining. Raindrops fell on the travelers through the opened window. Seeing the rain, the old man's son said happily, "See, Dad, how beautiful the rain is!" Hearing these words, a young lady became angry with the man, as the raindrops were dropping on her new clothes. She shouted at the noisy son and his father. "Can't you see it is raining? You! Old man! If your son is not feeling well, get him to a mental hospital quickly and please don't disturb us!" The old man's face turned red and then he answered in a low voice, "We are on the way back from hospital. He couldn't see anything when he was born. Only last week he could see again. The rain and the nature are new to him. Please forgive him." All the other people became quiet.35.What did people think of the son at first?A、lovelyB、funnyC、strangeD、clever36.What is the Chinese meaning of the underlined word "forgive"?A忘记B原谅C 谴责D欣赏37.According to the passage, what does the writer want to tell us?A、We should be friendly to sick people.B、We should learn to enjoy the nature.C、We should respect the elder people.D、We should know the truth before complaining.答案：35-37CBDDDo you often make the V sign (3)when taking photos? You might want to do so less often from now on.Experts(专家) say that it is possible to use the V sign to copy(复制)someones fingerprints(指纹).Someone could take your photo_20omin(放大) on your fingers，and then use Al tcchnology(人工智能技术) to copy your prints.Does that mean you should not make the V sign in photos any more? Not really. The fingerprints in your photos must be clear enough to copy. If the photo is taken from 1.5 meters or less away, it is possible to copy your prints. But if the photo is taken from over 3 meters away, your prints wont be clear enough to copy. The photos we put online are usually not clear enough to copy But still, you should be careful.Did you know?Your fingerprints are unique. It means that no one else in the world has the same fingerprints as yours. Not even twins have the same fingerprints. The fingerprints on each of your fingers are also different.Your fingerprints stay the same from birth to death. This makes fingerprints one of the best ways todentify(识别)people38. According to Paragraph 2, why should we stop making the V sign in photos?A. Because it looks ugly.B. Because it is boring.C. Because it is not cool any more.D. Because someone might copy our fingerprints39. People can copy our fingerprints when we.A take photos from 4 meters awayB take unclear photos from 2 meters awayC take clear photos from 1 meter awayD. take photos without showing our fingers40. From fhe last paragraph oh, we can learn thatA. we should not make the V sign in photos anymoreB. we should be careful when putting V-Sign photos onlineC. it is impossible to copy one's fingerprintsD. we should not put our photos online at all答案：39-40DCB四、词汇运用(本题有15小题，每小题1分;共计15分)A.结合句意用方框内所给的单词的适当形式填空。
沪教版2019-2020学年八年级上学期英语期中四校联考试卷A卷
沪教版2019-2020学年八年级上学期英语期中四校联考试卷A卷一、听小对话，请从A、B、C三个选项中选择符合对话内容的图片。
(共5题；共10分)1. （2分）选出与其意思相符的图片。
A .B .C .2. （2分）Who is Tara?A .B .C .3. （2分）听句子，选出与其意思相符的图片A .B .C .4. （2分）When did they go to Beijing?A .B .C .5. （2分）选出与其意思相符的图片（）A .B .C .二、听长对话，从A、B、C三个选项中选出最佳的选项。
(共2题；共16分)6. （10分）听一段对话，回答小题。
（1）How did Jenny go to the old people's home last Sunday?（2）How did the old people feel that day?7. （6分）听下面一段对话，回答问题。
（1）Why does the woman not book（预定）the hotel?A . She's staying with her friends.B . She was busy with her work.C . She can't find a hotel.（2）What is the man going to do in the vacation?A . Take piano lessons.B . Go to the beach.C . Give piano lessons.（3）What do you know about the man?A . He's thinking about where to go.B . He will go with the woman.C . He thinks Diana is very lucky.三、听一段独白，请从A、B、C 三个选项中选择正确的选项，完成信 (共1题；共2分)8. （2分）What's Kate's telephone number?A .B .C .四、单项填空 (共10题；共20分)9. （2分）—Lily is _______ English girl.—And she is _______ friendly girl.A . a; anB . a; aC . an; aD . an; an10. （2分）Children often _______ special clothes _______ masks on HalloweenA . wear; withB . put on; withC . wear; forD . dress; for11. （2分）— Can you tell me why you learn English so well?— It's easy. ______ you work, ______ grades you can get.A . The more careful; the betterB . The more carefully; the bestC . The more carefully; the better12. （2分）Mr. Fang ______ always _______.A . is; smokingB . are; smokingC . /; smokesD . doesn't' smoke13. （2分）It was bad weather that we all had to stay at home.A . tooB . suchC . so14. （2分）My shoes are too small. I want to buy a new________.A . oneB . onesC . pairD . shoe15. （2分）——_______ your friend have a tennis racket?——No, but he has a great ping-pong bat collection.A . IsB . DoesC . HasD . Do16. （2分）— ______the computer?—On the table.A . Where'sB . What'sC . Is itD . It's17. （2分）Many people do not realize the importance of health______ they have fallen ill.A . untilB . whileC . whenD . after18. （2分）一 Please help me look up the word in the dictionary.一 _______.A . You're rightB . I think soC . No problem五、完型填空 (共1题；共10分)19. （10分）通读全文，根据短文内容的理解，选择最佳答案填空。
上海市外国语大学附属双语中学2020-2021学年八年级上册期中仿真密卷
2020-2021学年上外双语中学初二上学期期中仿真密卷一、选择题（每题2分，共12分）1.下列各组二次根式中，是同类二次根式的是（）（A 212B 333C ab 2a bD 1a -1a + 2.甲乙两个同学解方程20x px q ++=，甲看错了一次项，得根2和7；乙看错了常数项，得根1和10-，则原方程为（）（A ）29140x x -+=（B ）29140x x +-=（C ）29140x x --=（D ）29140x x ++=3.下列多项式能在实数范围内因式分解的是（）（A ）29x +（B ）227x x ++（C ）2236x x --（D ）2421x x -+ 4.下列关于x 的方程一定是一元二次方程的是（）（A ）2221x x x +=-（B ）22270m x x -+=（C ）2110x x +-=（D ）20ax bx c ++=5.化简：1(23)32a b b a-- （A ）1-（B ）1（C 32b a -（D ）32b a --6.命题：①邻补角互补；②对顶角相等；③两点之间线段最短；④同旁内角互补；⑤直线都相等；⑥任何数都有倒数；⑦如果a 2=b 2，那么a =b ；⑧三组角对应相等的两个三角形全等；⑨如果∠A −∠B =90∘，那么∠A 与∠B 互余．其中真命题有（ ）（A ）3个（B ）4个（C ）5个（D ）6个二、填空题：（每题2分，共24分）7.已知1x <-且0y >23(1)x y +=__________. 8.在实数范围内分解因式：221x x -++=__________.9.若21x y x x =-+，则y 的取值范围__________. 10. 若方程230x x a -+=的两根均大于1，则a 的取值范围是__________________.11.写出25x -____________．12.在实数范围内因式分解：2223x xy y --=____________．13．现代互联网技术的广泛应用，催生了快递行业的高速发展，某快递公司今年3月份和5月份完成投送的快递件数分别是20万件和24.2万件，假设该公司每月投送快递件数的增长率相等，那么该公司每月的增长率是____________．14．关于x 的方程2(21)20kx k x k +-+-=有实数根，那么k 的取值范围是____________．15. 如图，在工地一边的靠墙处，用120米长的铁栅栏围一个所占地面积为1000平方米的长方形临时仓库，并在其中一边上留宽为3米的大门，设无门的那边长为x 米，根据题意，可建立关于x 的方程是__________．16.某药厂由原售价连续两次降价，每次下降的百分率都相等，每瓶零售价由150元降为96元，那么下降百分率为__________．17.若实数满足16a a a a+=，____________． 18.设12x x 、是关于x 的方程20x px q ++=的两个实数根，121+1x x +，是关于x 的方程20x qx p ++=的两实数根，则p q +=______________．三、简答题：（每题6分，共24分）19111126(27)238208(3)36x x ≤21.用适当的方法解方程：22(2)5x x x -=+22.用配方法解方程：23510x x +-=四、解答题：（每题8分，共40分）23. 如图，某农场有一道长为16米的墙，计划用32米长的围栏靠墙围成一个一面用墙，三面用围栏，面积为120平方米的矩形草坪ABCD ,求该矩形草坪BC 边的长。
上海市外国语大学附属双语学校2020-2021学年八年级上学期期中数学试题
3．若方程 的两个解是 ，那么 在实数范围内分解因式是（）
A． B．
C． D．
4．下列说法中，正确的是（）
A． 与 互为有理化因式
B．方程 的解是
C．方程 的解为
D．若方程 有两个实数根，则这两实数根互为倒数
5．命题①邻补角互补；②三角形的一个外角等于它的两个内角和；③两点之间线段最短；④如果两个角的补角相等，那么这两个角的余角也相等；⑤两边及其中一边上的高对应相等的三角形全等；⑥在三角形中，如果一边上的中线等于这一边上的一半，那么这条边所对的角是直角；其中真命题的个数有（）
∴ =0有实数根且k≠0，
∴
∴
解得： 且
故答案为： 且 ．
【点睛】
此题考查的是利用两根法因式分解，掌握因式分解与一元二次方程根的关系是解题关键．
12．
【分析】
根据 ，从而得出 ，然后分母有理化并化简可得 ，然后根据绝对值的性质即可得出结论．
【详解】
解：∵
∴
∴
∴
∴
∴
∴
∴
故答案为： ．
【点睛】
此题考查的是二次根式的比较大小、分母有理化和绝对值的性质，掌握分母有理化和绝对值的性质是解题关键．
Hale Waihona Puke 【详解】解：∵∴∴
∴
∴
解得：
故答案为： ．
【点睛】
此题考查的是二次根式的化简、绝对值的性质和分式有意义的条件，掌握完全平方公式、二次根式的性质、绝对值的性质和分式有意义的条件是解题关键．
9．
【分析】
先移项，然后对方程左边因式分解，然后利用因式分解法解答即可．
【详解】
解：
∴ 或
解得：
2019-2020学年上海外国语大学附属外国语学校初中部高三英语期中考试试卷及答案解析
2019-2020学年上海外国语大学附属外国语学校初中部高三英语期中考试试卷及答案解析第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项AKate Humble: Books that changed my lifeKate Humble is a writer and broadcaster specializing in science, wildlife and rural affairs. Together with her husband site runs Humble by Nature, a rural skills education centre on working farm near Monmouth intheWyeValley.Winnie the Poohby A A MilneMy father used to read this to me when I was very young — he used different voices for all the animals. The characterization (角色设定) was so clever; we all know someone just like each inhabitant of the HundredAcre Wood: gloomy Eeyore; thick but loyal Pooh; enthusiastic Tigger.A A Milne was masterful in exploring the way they got along together, opening my eyes to how society really works.Last Chance to Seeby Douglas Adams and Mark CarwardineThis book tells of the authors, adventures as they set out to find the rarest of animals, those on the edge of extinction.Their travels are rather exciting and they share a wonderful humour, which really appealed to me. Yet underpinning (支撑) everything is the realization that we can't just sit back and allow species to disappear. PicturePalaceby Paul TherouxI've always loved Theroux's travel writing, but this novel took my breath away. The words aren't long or complicated but, fromthat first paragraph, his writing grabs you by the nose hairs and drags you along. I had an art teacher who told me, “You're only an artist when you've found your own style, not when you're copying someone else, and Theroux represents this.”1. Why did the author mention the characterization ofWinnie the Pooh?A. To indicate the book has realistic values.B. To show how adorable the characters are.C. To persuade people to learn from the characters.D. To prove the writer is good at creating characters.2. What didLast Chance to Seestrike into Kate's heart?A. Curiosity.B. Responsibility.C. Exploration.D. Devotion.3. Which writer does Kate Humble like for his original writing?A. A A Milne.B. Douglas Adams.C. Mark Carwardine.D. Paul Theroux.BYou’re in a crowd of people who are all asking for the same thing. How do you make your voice heard above the rest? Be different. Don’t shout. Lisa, 25, was waiting to board a plane flying fromLondontoAustriafor Christmaswhen the flight was cancelled.“There were about a hundred of us unable to leave,” she says. “Everyone else was shouting at the airport staff. Instead of joining in, I walked up to the man behind the ticket desk very quietly and said, ‘This must be so awful for you! I don’t know how you deal with these situations—it’s not even your fault. I could never handle it as well as you are.’ Without my even asking, he found me a seat on another airline with an upgrade to first class. He was happy to do a favor forsomeone who was appreciative instead of unfriendliness.”Flattery (恭维) is an essential element of the sweet-talk strategy. “It’s human psychology that stroking a person’s ego (自我) with a few well-directed praises makes them want to prove you right,” says apsychologist. “Tell someone they’re pretty and they’ll instantly fix their hair; praise their sense of humor and they’ll tell a joke.”You need help and there’s ly no reason that the person will want to lend a hand. Allison, 26. a lawyer, realized she’d made a huge mistake on a batch of documents. “The only way I could fix the problem was to get the help of a colleague who I knew didn’t like me,” she said.Allison then went to the woman’s office and explained her problem. “As I was saying to the boss the other day you’re the only person who would know how to handle a situation like this, what would you suggest I do?” “Feeling pumped up (鼓励), she set about helping me and we finished the job on time, and she was happy to help.” Allison said.4. Whatwould have happened at the airport according to paragraph 1?A. The departure hall was filled with noise.B. Someone screamed just lo be different.C. The passengers waited on board patiently.D. The airport stuff were rude to the passengers.5. Why did the man put Lisa on another airline?A. He admired Lisa’s beauty.B. He appreciated her attitude.C. He was ready to help others.D. He was blamed for the cancellation.6. What is the third paragraph mainly about?A. The potential benefits of ego.B. The strategy to start small talk.C. The great importance of flattery.D. The value of humor in daily life.7. What can we learn about Allison’s colleague?A. She was a popular lawyer.B. She was always ready to help others.C. She always got praise from Allison.D. She did a great favor for Allison eventually.CScientists often compare coral reefs(珊瑚礁) to underwater rainforests, yet unlike the leafy plant base of a forest, corals are animals. The soft creatures are naturally half-transparent and get their brilliant color1 from algae(藻类) living inside them. When corals experience stress from hot temperatures or pollution, theyhaltthe interdependent relationship with algae, typically pushing them out and turning white. Corals are still alive when they are white, but they're at risk and many eventually die, turning dark brown.Scientists around the world are looking for means to protect and maybe increase corals. One common option is to create more protected areas — essentially national parks in the ocean. Beyond nature preserves, some conservationists are looking to more hands-on methods. One research center in the Florida Keys is exploring a form of natural selection to keep corals remaining. The reef system in the Keys has been hit hard by climate change and pollution, which is especially tough, because corals there help support fisheries worth $ 100 million every year.To keep the wild ecosystem alive, Erinn Muller, the center's director, and her team are harvesting samples of the corals that survived the environmental stress naturally, keeping them to make them reproduce, and then reattaching them to the reef. They have 46,000 corals on plastic frames under the sea. So far, the center hasregrown over 70,000 corals from five different species on damaged reefs.In The Bahamas, Ross Cunning, a research biologist at Chicago's Shedd Aquarium, focuses on corals with genes that could make them natural candidates for restoration projects. He published a study of two Bahamian reefs, one that survived an extreme 2015 heat wave, and one that didn't. "We think their ability to deal with these higher temperatures is built into their genes," says Cunning. There's evidence of corals evolving more quickly to resist rapidly warming climate. The big question scientists need investigate, adds Gunning, is how much more heat corals can adapt to.8. What does the underlined word "halt" in the first paragraph mean?A. End.B. Develop.C. Strengthen.D. Weaken.9. What do Muller and her team do to save corals?A. Restore the damaged reefs.B. Grow corals by hand underwater.C. Create more protected areas.D. Move corals to unpolluted areas.10. What do Gunning's words suggest?A. Many corals have been genetically improved.B. Cooling down the waters is key to rescuing corals.C. Reasons for corals surviving heat waves are shocking.D. The highest temperature corals can survive is unclear.11. Which can be a suitable title for the text?A. Relationship between corals and algaeB. Efforts made to save coralsC. Impact of climate warming on coralsD. Survival crisis faced by coral reefsDA Singaporean company will feed airport food waste to mealworms before turning them into fish feed, aiming to cut the country's use of imported feed and offer a continuous alternative.Blue Aqua Internationalwill partner with Dnata, an air and travel services provider, to change organic waste at Singapore's Changi Airport into insect protein for aquacultural use, according to a statement Tuesday.The project looks to replace traditional fish and soybean meal as the main sources of protein for aquafeed. The insects will eat the food waste and change it into part of the body containing about 60 per cent protein. The dried baby worms will then be made into feed.These mealworms can be a continuous solution to several problems. Using a small land and giving out less carbon, they turn food waste into feed and offer an alternative source of protein. Ynsect SAS, a small Frenchbusiness that keeps mealworms to feed fish and pets, attracted money from investors includingIron Manmovie actor Robert Downey Jr. in a round of fund-raising last year.The deal will give Singapore's farmers access to domestically produced animal feed, which is traditionally bought from abroad. The Southeast Asian nation imports more than 90 percent of its food and has set a goal to produce a third of its food locally by 2030. It also aims to achieve a general recycling rate of 70 per cent by then. Presently, less than 20 per cent of Singapore's food waste is recycled.As part of the partnership, Dubai-based Dnata will add Blue Aqua to its list of suppliers to buy locally farmed seafood for its catering service.12. What is the function of mealworms?A. To cut the use of imported fish feed.B. To eat food waste and make fish feed.C. To domestically produce animal feed.D. To replace traditional fish and soybean meal.13. What does Paragraph 4 mainly talk about?A. The producers of the feed.B. The purpose of the projectC. The advantages of the project.D. The composition of the feed.14. What can we infer about Singapore from Paragraph 5?A. It is a rich country.B. It is short of self-produced food.C. Its recycling rate is very high now.D. Its farmers don't support the deal.15. What is the text mainly about?A. A new way to produce fish feed.B.An introduction to a company.C. A plan to reduce food waste.D. A deal to protect farmers.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
上海大学附属学校 2020年八年级上学期 期中考试英语试卷含答案
2020学年第一学期八年级英语期中测试卷Part 1 Listening （第一部分听力）（共25分）I. 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. _________II. 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): (7分)( ) 7. A. She is watching TV. B. She is doing his homework.C. She is cleaning his room.D. She is listening to the radio.( ) 8. A. It is boring. B. It is interesting. C. It is useful. D. It is helpful.( ) 9. A. In a taxi. B. At home. C. In the office. D. On a bus.( ) 10. A. She worked hard at home. B. She learned computer.C. She went on a trip.D. She had a test.( ) 11. A. Learning English. B. Buying a birthday present.C. Having a birthday party.D. Looking for the English dictionary.( ) 12. A. 50 dollars. B. 25 dollars. C. 40 dollars. D. 20 dollars.( ) 13. A. The woman should buy new shoes.B. The woman should buy a third pair.C. The woman should borrow the shoes from others.D. The woman shouldn’t buy two pairs of shoes.III. 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)（4分）( ) 14. Hong Kong has about fourteen public beaches.( ) 15. People can get to all the beaches by bus.( ) 16. You will swim safely if you remember these instructions.( ) 17. You can’t swim when you feel hungry and tired.IV. Listen to the passage and fill in the blanks. (根据你听到的内容，完成下列句子，每空格限填一词):（8分）18. Sometimes people give _________ gifts in Japan, but they are not _________.19. Many people have _________ things and don’t want too many gifts _________.20. In Canada, many people will _________ _________ a park bench or a tree to help remember aperson.21. In the USA, some people ask their families and friends to give money to charity _________________ buy them gifts.Part 2 Vocabulary and Grammar(第二部分词汇和语法)（共35分）II. Choose the best answer (选择最恰当的答案) (共13分)22.Which of the underlined parts in each sentence has a different sound from the other three?A) He dealt with the problem in a highly professional way.B) Only later did she realize her mistake.C) I have read this book twice.D) A young woman admitted three theft charges and was put into prison for two years.23. Yesterday is ________ unusual day, but today is ________ usual day.A) a, a B) an, an C) an, a D) a, an24. Friends tend to be highly similar_________ one another.A) on B) in C) to D) for25. Mother came into my study with a cup of milk in one of her hands, and an apple in ________.A) the others B) other C) the other D) another26. is one of ________ shopping websites in China.A) large B) larger C) largest D) the largest27. Two ________ were talking with students in the office when the fire happened.A) woman teachers B) woman teacherC) women teacher D) women teachers28. For the safety, everyone ________ obey the traffic rules when he is driving or walking.A) need B) must C) may D) could29. The bag of rice weighs _______. The old lady can’t take it upstairs.A) five kilograms and half B) five and half kilogramsC) five and a half kilogram D) five kilograms and a half30. When Ding Junhui finally won the game, his fans looked ________.A) happily B) well C) exciting D) excited31. Have you been to Australia ?Yes, I ________ there with my family last year.A) go B)went C) have been D)will go32. We saw Lucy ________ a walk with her parents in the park last night.A) to have B) had C) having D) has33. Wendy is good at all the lessons. I often ask her ____ me with my lessons.A)help B) helps C) to help D) helping34. The young man________ his bag and showed us that he didn’t steal anything from us.A) went down B) went off C) held on D) held outIII. Complete the following passage with the words or phrases in the box. Each word or phrase can only be used once（将下列单词或词组填入空格。
2022-2023学年上海外国语大学附属中学八年级上学期期中考试数学试卷含详解
2022学年第一学期初二年级数学期中考试试卷一、填空题（共16空，每空2分，共32分）1.方程()220x -=的解为__________________.2.有意义，则x 的取值范围是______．3.方程102x x +=+的解是______．4.________．5.在实数范围内因式分解：223105x y xy ++=______．6.若两最简根式a +是同类二次根式，则a b +的值的平方根是______．7.关于x的一元二次方程2(12)10k x ---=有两个不相等的实数根，则常数k 的取值范围是_______．8.把______．9.211340x x -+-的最大值为______．10.已知的整数部分为a ，小数部分为b ，则2a b b ++=________.11.22+=______．12.已知)531=-，则=______．13.)58x +≤≤=______．14.将进货单价为40元的商品按50元出售时，就能卖出500个，已知这种商品每个涨价1元，其销售量就减少10个，为了赚得8000元的利润，商品售价应为________元．15.已知关于x 的方程()()22232220m x m m x m m ---+++=的根是正整数，则整数m 的值为______．16.关于x 的方程21x k-+=有4个不同的实数根，则k 的取值范围是______．二、选择题（共4题，每题3分，共12分）17.已知a<0，则二次根式化简后的结果为（）．A.B. C.- D.-18.下列关于x 的方程中，一定是一元二次方程的有（）个．①21111x x x x +=+++；②3x x =+；③()()2222x x x x +-=-；④20ax bx c ++=A.0B.1C.2D.319.下列命题正确的是（）A.= B.与是同类二次根式C.2x =是分式方程3532x x x+=-的增根 D.一元二次方程可能没有实根，可能有一个实根，可能有两个实根20.某中学“启明文学社”的全体同学租一辆面包车去某景点游览，面包车的租价为180元，出发时又增加了两名其他社团的同学，结果每个同学比原来少摊了3元车费．若设“启明文学社”有x 人，则所列方程为（）A.18018032x x -=- B.18018032x x -=+C .18018032x x -=+ D.18018032x x -=-三、计算与解方程（共6题，每题5分，共30分）21.计算：⎛÷ ⎝．22.配方法：22510x x +-=．23.解方程：()()2243434x x -=-．24.解方程：2223332123x x x x ---=--．25.解关于x 的方程：()()220a b c x ax a b c -++++-=．26.解关于x 的方程：2460ax x +-=．四、解答题（共4题，每题6分，共24分）27.已知4,1,a b ab +=-=则的值是_____.28.关于x 的方程2211k x kx x x x x +-=--只有一个实数根，求：k 的值．29.某厂一月份的产值是50万元，第一季度总产值是182万元，求：平均月增长率．30.已知关于x 的方程25100x px ++=和22250x x p --=有公共根，求：p 的值．五、探索题（共2分）31.尝试用解方程的方法求无限循环分式：33131311++++．2022学年第一学期初二年级数学期中考试试卷一、填空题（共16空，每空2分，共32分）1.方程()220x -=的解为__________________.x 1=x 2=2【分析】设x-2=y ，即y 2=0，则y=0，然后求出x 即可．【详解】解：设x-2=y ，即y 2=0∴y 1=y 2=0∴x-2=0，即x 1=x 2=2．故答案为x 1=x 2=2．【点睛】本题考查了解二元一次方程，掌握运用整体法和直接开平方法解一元二次方程是解答本题的关键．2.有意义，则x 的取值范围是______．4x ≥【分析】根据二次根式和分式有意义的条件，列式求解即可．【详解】解：由题意可得：40x -≥，20x +≥且20x +≠解得4x ≥，2x >-∴4x ≥故答案为：4x ≥【点睛】此题考查了二次根式和分式有意义的条件，解题的关键是熟练掌握二次根式和分式有意义的条件，二次根式有意义的条件是被开方数为非负数，分式有意义的条件为分母不能为0．3.方程102x x +=+的解是______．1x =-【分析】先去分母，然后解一元二次方程即可．【详解】解：102x x +=+去分母得：()210x x ++=，去括号得：2210x x ++=，即()210x +=，∴10x +=，解得：1x =-，当1x =-时，20x +≠，∴1x =-是原分式方程的解，故答案为：1x =-．【点睛】题目主要考查解分式方程的一般步骤，熟练掌握解分式方程的方法是解题关键，注意最后进行检验．4.________．【分析】根据有理化因式的定义:两个根式相乘的积不含根号,即可解答【详解】由平方差公式,22(a x b y =-因而分子,分母同时乘以,能把分母中的根号消去,所以+的有理化因式是故答案为【点睛】此题考查分母有理化，掌握运算法则是解题关键5.在实数范围内因式分解：223105x y xy ++=______．55333xy xy ⎛⎫⎛⎫-+ ⎪⎪ ⎪⎪⎝⎭⎝⎭【分析】令t xy =，则式子可化为23105t t ++，令231050t t ++=，求解即可．【详解】解：令t xy =，则式子可化为23105t t ++，令231050t t ++=，3a =，10b =，5c =41010435510263b t a -±-±-===即153t -+=，253t -=∴225105101055103105333333x y xy xy xy xy xy ⎛⎫⎛⎫⎛⎫⎛⎫-+---+++=--=-+ ⎪⎪ ⎪⎪ ⎪⎪ ⎪⎪⎝⎭⎝⎭⎝⎭⎝⎭故答案为：105510333xy xy ⎛⎫⎛⎫+-+ ⎪⎪ ⎪⎪⎝⎭⎝⎭【点睛】此题考查了因式分解，涉及了一元二次方程的求解，解题的关键是正确求得一元二次方程的两个根．6.若两最简根式a +是同类二次根式，则ab +的值的平方根是______．±【分析】根据同类二次根式的定义，列出方程，求解即可，【详解】解：由题意可得：722573a b a b a b +=⎧⎨+-=+⎩，解得91a b =⎧⎨=-⎩8a b +=8的平方根为±故答案为：±【点睛】本题考查了同类二次根式的定义，熟练掌握同类二次根式的定义是解题的关键．7.关于x 的一元二次方程2(12)10k x ---=有两个不相等的实数根，则常数k 的取值范围是_______．12k -≤<且12k ≠【分析】一元二次方程有两个不相等的实数根，则△=b 2-4ac ＞0，结合一元二次方程的定义，求出k 的取值范围．【详解】由题意得：1−2k ≠0即k ≠12，k +1≥0，即k ≥−1，△=b 2−4ac 2−4×(1−2k )×(−1)=8−4k >0，∴k <2，故答案为：12k -≤<且12k ≠．【点睛】此题考查根的判别式，二次根式有意义的条件，解题关键在于掌握判别式．8.把______．【分析】根据二次根式的性质可得110a ->，则a<0，据此即可求解．【详解】解：∵∴110a ->，则a<0，∴==．【点睛】本题考查了二次根式的性质化简，掌握二次根式的性质是解题的关键．9.211340x x -+-的最大值为______．22【分析】将式子配方成完全平方式即可得出答案．【详解】解：211340x x -+-21(12)103x =-++21(1236)10123x x =-++++21(6)223x =-++，∵2(6)0x +≥，∴21(6)03x -+≤，∴当6x =-时，原式取得最大值22，故答案为：22．【点睛】本题考查了配方法的应用，熟练掌握配方法是解本题的关键．10.已知的整数部分为a ，小数部分为b ，则2a b b++=________.5a ，小数部分为b ，求出a ，b 的值后代入即可得出答案．3=-12<<，∴3的整数部分为：1a =，小数部分为：312b ==-，∴2125a b b ++=+-.【点睛】本题考查了二次根式的化简求值，难度适中，关键是根据已知条件先求出a ，b 的值再求解．11.22+=______．622【分析】2222++=，，2-=+即可得出答案．2222+++=，∴原式的倒数===226222=+622=，∴原式2(62)6242++====；故答案为：622+．【点睛】本题考查了分母有理化，熟练掌握分数的性质以及平方差公式是解本题的关键．12.已知)531=-，则=______．2-##2-+m =，则原式为(5)(1)3m m +-=，求解取值即可．m =，则原式为(5)(1)3m m +-=，整理得：248m m +=，配方得：2(2)12m +=，∴12m =，22m =-，0≥0≥，0≥，2=-，故答案为：2-．【点睛】本题考查了换元法解一元二次方程，配方法解一元二次方程，算术平方根等知识，熟练掌握解一元二次方程即可．13.)58x +≤≤=______．2+【分析】根据完全平方公式，得出13+，根据x 的取值范围得出3≥≤，化简绝对值即可求解．==13=+；∵58x ≤≤，3≥≤，13+13=-+2=，2+．【点睛】本题考查了二次根式的化简，掌握二次根式的性质是解题的关键．14.将进货单价为40元的商品按50元出售时，就能卖出500个，已知这种商品每个涨价1元，其销售量就减少10个，为了赚得8000元的利润，商品售价应为________元．60或80【分析】设商品售价应为x 元，由题意可得()()4050010508000x x ---=⎡⎤⎣⎦，进而求解即可．【详解】解：设商品售价应为x 元，由题意可得：()()4050010508000x x ---=⎡⎤⎣⎦，解得：1260,80x x ==，∴当商品售价为60元或80元时，赚得8000元的利润；故答案为60或80．【点睛】本题主要考查一元二次方程的应用，熟练掌握一元二次方程的应用是解题的关键．15.已知关于x 的方程()()22232220m x m m x m m ---+++=的根是正整数，则整数m 的值为______．3或5-或4或5或7或11【分析】分原方程为一元一次方程和一元二次方程进行讨论即可．【详解】解：当30m -=时，即3m =时，原方程为81860x -++=，解得：3x =，符合题意；当3m ≠时，()()22232220m x m m x m m ---+++=，因式分解得：[](3)(22)()0m x m x m --+-=，∴(3)(22)0m x m --+=或0x m -=，当0x m -=时，x m =，原方程无解；当(3)(22)0m x m --+=时，222(3)882333m m x m m m +-+===+---，∴5m =-时，1x =，4m =时，10x =，5m =时，6x =，7m =时，4x =，11m =时，3x =，综上所述：m 的值为3或5-或4或5或7或11时，原方程的根为正整数，故答案为：3或5-或4或5或7或11．【点睛】本题考查了根据方程的解的情况确定系数的范围，读懂题意，分原方程为一元一次方程和一元二次方程两种情况进行讨论是解本题的关键．16.关于x 的方程21x k -+=有4个不同的实数根，则k 的取值范围是______．2<<2k -【分析】根据题意，列出两个一元二次方程，然后根据∆的值与一元二次方程根的关系列式求解即可．【详解】依题意，关于x 的方程21x k -+=与21x k -+=-,各有2个不等实数根，即210x k -+-=，210x k -++=∴()2412410b ac k ∆=-=-->且()2412410b ac k ∆=-=-+>解得2k >-且2k <即2<<2k -故答案为：2<<2k -【点睛】本题考查了一元二次方程20ax bx c ++=(0a a b c ≠，，，为常数)的根的判别式24b ac ∆=-，理解根的判别式对应的根的三种情况是解题的关键．当0∆>时，方程有两个不相等的实数根；当Δ0=时，方程有两个相等的实数根；当Δ0<时，方程没有实数根．二、选择题（共4题，每题3分，共12分）17.已知a<0，则二次根式化简后的结果为（）．A. B. C.- D.-D【分析】由题意可得0b <，再根据二次根式的性质化简即可．【详解】解：由题意可得：0b <=∵a<0∴a a=-==-故选：D【点睛】此题考查了二次根式的化简，解题的关键是熟练掌握二次根式的性质．18.下列关于x 的方程中，一定是一元二次方程的有（）个．①21111x x x x +=+++；②3x x =+；③()()2222x x x x +-=-；④20ax bx c ++=A.0 B.1C.2D.3A【分析】根据一元二次方程的定义逐项分析判断即可，一元二次方程定义，只含有一个未知数，并且未知数项的最高次数是2的整式方程叫做一元二次方程．【详解】解：①21111x x x x +=+++，是分式方程，不是一元二次方程；②3x x =+，是一次方程，不是一元二次方程；③()()2222x x x x +-=-，整理后不含2x 项，不是一元二次方程；④20ax bx c ++=，当0a =时，不是一元二次方程，故选：A ．【点睛】本题考查了一元二次方程的定义，掌握一元二次方程的定义是解题的关键．19.下列命题正确的是（）A.= B.与是同类二次根式C.2x =是分式方程3532x x x+=-的增根 D.一元二次方程可能没有实根，可能有一个实根，可能有两个实根B【分析】根据二次根式、分式增根以及一元二次方程的知识，对选项逐个判断即可．【详解】解：A ，当a<0，0b <=，选项错误，不符合题意；B 213=6===，被开方数相同，是同类二次根式选项正确，符合题意；C 、将3532x x x+=-转化为整式方程为3(53)(2)x x x =+-化简可得：251060x x --=2x =不是方程251060x x --=的根，∴2x =也不是3532x x x+=-的增根，选项错误，不符合题意；D 、一元二次方程可能没有实根，可能有两个相等的实根，可能有两个不相等的实根，说法错误，不符合题意；故选：B【点睛】本题考查了二次根式运算、同类二次根式、分式增根以及一元二次方程的知识，解题的关键是熟练掌握相关基础知识．20.某中学“启明文学社”的全体同学租一辆面包车去某景点游览，面包车的租价为180元，出发时又增加了两名其他社团的同学，结果每个同学比原来少摊了3元车费．若设“启明文学社”有x 人，则所列方程为（）A.18018032x x -=- B.18018032x x -=+C.18018032x x-=+ D.18018032x x-=-B【分析】利用总的租价除以人数求得每个同学的车费，再根据增加人数前后每人的均摊车费差列方程即可；【详解】解：由题意得：18018032x x -=+，故选：B ．【点睛】本题考查了分式方程的实际应用，找准题中等量关系列方程是解题关键．三、计算与解方程（共6题，每题5分，共30分）21.计算：⎛÷ ⎝．-【分析】根据二次根式的乘除运算法则进行计算即可．【详解】解：⎛÷ ⎝33(24=÷-34(23=⨯-=-，00x y >>，，∴原式=-【点睛】本题考查了二次根式的乘除混合运算，掌握二次根式的乘除运算法则是关键，最后二次根式要化成最简二次根式．22.配方法：22510x x +-=．15334x -+=,25334x --=.【分析】先确定一元二次方程各项系数，再运用求根公式即可求解.【详解】解：∵22510x x +-=，∴a=2,b =5,c =-1则△=b 2-4ac =22-4×2×(-1)=33>0,∴该方程的根为5334x -±=,即15334x -+=,25334x -=.【点睛】熟练掌握一元二次方程的求根公式：42b x a-=是解题的关键，但是在用求根公式之前一定要先判定判别式.23.解方程：()()2243434x x -=-．11110x =，252x =【分析】先移项，然后利用因式分解法求解即可．【详解】解：()()2243434x x -=-()()22043434x x --=-[][]432(34)432(34)0x x x x -+----=即(1011)(25)0x x --+=则11110x =，252x =．【点睛】此题考查了因式分解法求解一元二次方程，涉及了平方差公式，解题的关键是掌握因式分解法求解一元二次方程．24.解方程：2223332123x x x x ---=--．10x =，223x =，31x =-，41x =【分析】设2231x y x -=-，则原方程为32y y -=，求解得出3y =或1y =-，分别代入求解即可．【详解】解：设2231x y x -=-，则原方程为32y y -=，整理得：2230y y --=，解得：3y =或1y =-，当3y =时，即22331x x -=-，整理得：2320x x -=，解得：10x =，223x =；当1y =-时，22311x x -=--，整理得：2240x x +-=，解得：31x =-，41x =，经检验：10x =，223x =，31x =-，41x =-是原方程的解，综上所述，原方程的解为10x =，223x =，31x =-，41x =．【点睛】本题考查了解分式方程，换元法解一元二次方程，将2231x x --设为y ，将原方程整理为含y 的分式方程是解本题的关键．25.解关于x 的方程：()()220a b c x ax a b c -++++-=．①当0a b c -+=，且0a ≠时，=1x -；②当0a b c -+=，且0a =时，原方程的解是一切实数；③当0a b c -+≠，且0a ≠时，11x =-，2a b cx a b c--+=-+；④当0a b c -+≠，且0a =时，11x =，21x =-【分析】根据二次项系数等于0，一次项系数为0，以及都为0和都不为0，四种情况讨论进行计算即可求解．【详解】①当0a b c -+=，且0a ≠时，a b c =-，原方程为220ax a +=，解得=1x -；②当0a b c -+=，且0a =时，原方程左边=0=右边，原方程的解是一切实数；③当0a b c -+≠，且0a ≠时，()()()()()2222224444a a b c a b c a a b c b c ⎡⎤∆=--++-=---=-⎣⎦，∴()()222a b c x a b c -±-=-+，解得11x =-，2a b cx a b c--+=-+，④当0a b c -+≠，0a =时，原方程为()()20b c x b c -++-=，∴21c bx c b-==-，解得11x =，21x =-．【点睛】本题考查了解一元一次方程，解一元二次方程，根据题意分类讨是解题的关键．26.解关于x 的方程：2460ax x +-=．0a =时，32x =；23a ≥-且0a ≠时，246ax a-±=；当23x <-时，原方程无解【分析】分0a =和0a ≠两种情况进行讨论，当0a ≠时根据根的判别式再分23a ≥-和23x <-两种情况进行讨论即可．【详解】解：当0a =时，原方程为460x -=，解得：32x =；当0a ≠时，241624b ac a ∆=-=+，若16240a +≥，即23a ≥-时，则416242462x a a-±-±==，若16240a +<，即23a <-，则原方程无解；综上：0a =时，32x =；23a ≥-且0a ≠时，246ax a-=；当23x <-时，原方程无解．【点睛】本题考查了解一元一次方程，公式法解一元二次方程，一元二次方程根的判别式，灵活运用所学知识点运用分类讨论的思想解题是关键．四、解答题（共4题，每题6分，共24分）27.已知4,1,a b ab +=-=则+的值是_____.-14【分析】根据已知的等式可知a,b 为负数，再根据分式的运算得到+=()a ba b b a b a+=--=-+，再根据完全平方公式的变形即可求解.【详解】∵4,1,a b ab +=-=∴a,b 为负数，∴+=(a ba b b a b a=--=-+=222()2()a b a b a b ab b a ab ab ++--+=-=-=2(4)211--⨯-=-14故填：-14.【点睛】此题主要考查实数的运算，解题的关键是熟知分式的运算及乘方公式的运用.28.关于x 的方程2211k x kx x x x x+-=--只有一个实数根，求：k 的值．k 的值为0或12【分析】先将分式方程转化为整式方程，把分式方程的讨论转化为整式方程的解的讨论，求解即可．【详解】解：将2211k x kx x x x x+-=--转化为整式方程可得：2(23)10kx k x +--=；当0k =时，方程为210x -=，解得12x =经检验，12x =是原方程的解；当0k ≠时，方程为一元二次方程，判别式222(23)454(1)0k k k k ∆=-+=+->所以一元二次方程有两个不相等的实数根，由题意可得，一元二次方程必有一个根为分式方程的增根，由分式方程可得，方程的增根只可能为0或1，当0x =时，方程2(23)10kx k x +--=不成立，舍去；当1x =时，方程为(23)10k k +--=，解得12k =，将12k =代入2(23)10kx k x +--=可得220x x +-=解得1x =或2x =-经检验，2x =-是原分式方程的解，综上：k 的值为0或12．【点睛】本题考查了解分式方程，注意：分式方程转化为整式方程不一定是等价转化，有可能产生增根，分式方程只有一个解，可能是转化后所得的整式方程只有一个解，也可能是转化后的整式方程有两个解，而其中一个是原方程的增根，故分式方程的解的讨论，要运用判别式增根等知识全面分析．29.某厂一月份的产值是50万元，第一季度总产值是182万元，求：平均月增长率．平均月增长率为20%【分析】设平均月增长率为x ，根据题意列出一元二次方程，解方程即可求解．【详解】解：设平均月增长率为x ，根据题意，得()()250501501182x x ++++=解得120.220%, 3.2x x ===-（舍去）答：平均月增长率为20%．【点睛】本题考查了一元二次方程的应用，根据题意列出一元二次方程是解题的关键．30.已知关于x 的方程25100x px ++=和22250x x p --=有公共根，求：p 的值．p 的值为75【分析】两式相减，然后进行因式分解，分情况讨论求解即可．【详解】解：根据题意，两方程相减，可得5225100px x p +++=化简可得：(52)(5)0p x ++=则520p +=或50x +=当520p +=时，25p =-，代入25100x px ++=可得22100-+=x x 判别式2(2)40360∆=--=-<，方程无解，与题意不符，舍去；当50x +=时，5x =-代入25100x px ++=可得75p =将75p =代入25100x px ++=可得：27100x x ++=解得15x =-，22x =-将75p =代入22250x x p --=可得：22350x x --=解得15x =-，27x =两个方程公共根，5x =，符合题意；故p 的值为75．【点睛】此题考查了一元二次方程的求解，涉及了因式分解法，解题的关键是理解题意，通过作差得到(52)(5)0p x ++=．五、探索题（共2分）31.尝试用解方程的方法求无限循环分式：33131311++++ ．311332131311-+=++++【分析】设33131311x =++++，根据循环分式的特点得出31x x=+，0x >，解这个方程即可求解．【详解】解：设33131311x =++++∴31x x=+即()13x x +=解得1132x -±=∵0x >∴1132x -+=即311332131311-=++++【点睛】本题考查了解一元二次方程，根据题意列出一元二次方程是解题的关键．。
上海外国语大学附属外国语学校2019 2020八年级上学期期中考试英语试题听力部分略x
2018-2019学年上外附中初二第一学期期中考试Ⅱ. Choice10%16. Which of the following DOESN'T belong to the same category as the others?A. Snow White and the Seven DwarfsB. The Red ShoesD. The Crafty FoxC. The Little Red Riding Hood17. --- There's no chocolate milk left in the fridge. You _________ it all.--- Oh, I didn't. It _________ somewhere else. Let me find it.A. must have drunk; may beB. must drink; must beD. may have drunk; can beC. can drink; might be18. It took them about one month to _________ how to start the equipment.A. search forB. figure outC. check outD. look for19. Joseph is the student who always asks the teachers _________ questions before they go. Which of the following CAN'T be used in the sentence? []A. a few B. some C. an amount of D. a couple of20. --- Do you think robots will take the place of human beings in the far future? --- _________ Which is NOT the correct response?A. I hope not.B. I think not.D. I'm afraid not.C. It's possible, but I really doubt it.21. Regular exercise can help people _________ pressure and fatigue (疲劳).A. let go offB. catch hold ofC. let go ofD. bewareof22. Which of the following is CORRECT?[#xx#k]A. Lily was annoyed with herself for being careless again.B. Mum always told a bedtime story and sang me to asleep when I was small.C. Jane put up her best smile and raised to greet her customer.D. Fanny is not a guest. She is supposed not to be here.23. He doubt _________ he had seen was true.A. if thatB.that whatC. how thatD. whether what24. It's too late to invite Tim. _________, you know how he hates parties.A. BesidesB. It's even worseC. By the wayD. In other words25. The two officers were extremely lucky to _________ serious injury.A. gallopB. chaseC. escapeD. miss1.2 for a return stamp to get the special￥26. Stamp collectors only need to pay_________.A. postageB. postmarkC. sealD. cover27. The chef had _________ the apples and _________ cream on the strawberries before the dessert was done.A. peeled; spreadedB. peeled off; spreadD. peeled off; spreadedC. peeled; spread28. Which of the following activities is probably NOT a recreation?A. making potteryB. going on an outingD. doing household choresC. watching the stage drama29. Which of the following sentences is correct?A. He seems not to care about money.B. It seems like that she is a bright girl.C. Cell phones do not seem to cause cancer.D. Why did they seem to happy after they had a fight?30. Make sure you don't _________ the cover of the old magazine, otherwise all the pages will _________.A. cut off; be removedB. remove; come apartD. remove; curl upC. tear off; be cut out31. Some people _________ their jobs and become very successful. _________, findinga satisfactory job is like finding true love.A. fall in love with; ThusB. are keen on; As a resultC. in love with; In other wordsD. are fond of; That 's why32. Which of the following sentences is NOT correct?A. Do you find it hard to mould a good character?B. She found out living int the city quite exciting.C. We found it a bad idea to tell him the news right away.D. I find my Apple watch is much smarter than a normal watch.33. That businessman can _________ art as a hobby, for he is rich enough to _________ paintings and other artworks.A. take up; have a big collection ofB. choose; have big collection ofD. take; collect a large amount ofC. set up; collect a lot of34. I _________ you this book today, but I _________.B. meant to give; had forgottenA. had meant to give; forgotC. meant giving; forgotD. meant giving; had forgotten35. He finally realized that his _________ with aliens _________ a bit too far.A. interest; might have goneB. support; may goD. fascination; must goC. obsession; may have goneⅢ. Cloze5%steam, blowing off as a way of Busy people often 36 hobbies and weekend adventurescould 37 personal interests Your hobbies and and having fun. But there are other benefitsre facing a(n) 38 situation.'your leadership and you will be calmer when you Have you let your favorite personal interest fall by 39 ? The findings of a studyfun.have a little time by psychologists will encourage you to take away from work and done The research 40 that hobbies help professionals think of creative 41 tobetter the more you engage in creative activities, the work-related problems. In general, took participants hobby at work. The researcher noted that no matter what study you'll dopart in, these people were more 42 to go out of their way to help co-workers.For example, playing football 43 us to deal with challenges in other aspects ofsay, to think under pressure. You won't remain 44 and our life. It also teaches us toThe football players always keep going . Therefore, even “Hey, let's stop the game.”ll also tell yourself to keep going. Also, if your company is in financial stress, you's accomplishment. In football a player and his fellow teammates s about theteam'it'Teamwork way. is the same the sacrifice for each other for the 45 good of team. Businessis what drives success in business.D. have C. join 36. A. engage in B. take part inD. help C. form37. A. increase B. enhanceC. stressful 38. A. easyD. pressureB. complexC. the end 39. A. the wayside B. the halfD. the difficultyD. advices B. confirms 40. A. showed C. declaresD. solutions C. causes B. ideas41. A. waysD. likelyB. possible 42. A. happyC. often43. A. encourages B. arranges C. prepares D. permitD. relaxed 44. A. focusing B. happyC. focusedD. general45. A. related B. relativeC. commonⅣ. Reading comprehension15%(A)According to popular folklore, many animals are smarter than they appear. Dogs bark before earthquakes; cattle predict rainfall by sitting on the ground. But cattle may haveanother hidden talent in telling which way is north.Small animals such as mole rats living underground are known for the use of magnetism to navigate. Dr. Begall and her colleagues wanted to know whether larger mammals also havethe ability to perceive magnetic fields. They investigated this possibility by studying images of thousands of cattle captured on Google Earth, a website that stitches together satellite photographs to produce an image of the Earth's surface.Grazing animals are known to orient themselves in a way that minimizes wind chill from the north and maximizes the warmth of the sun when they are cold. The researchers thereforehad to study a lot of cows grazing in lots of different places at different times of day,in order to average out these factors and see whether cattle could act like compass needles.The researchers concluded that cattle do generally orient themselves in a north-south direction. This north-south preference has also been noted in flies, termites and honeybees.But unfortunately, even the high resolution of Google Earth is not powerful enough to tellwhich end of the cow is its head, and which its tail. The researchers were therefore unableto answer their research questions of whether cattle prefer to look north or south, and whether that differs in the northern and southern hemispheres.46. What is the article mainly about?A. The usefulness of Google Earth.B. Whether cattle are superior to other animals.C. Animals' sensitivity to natural disasters.D. Whether cattle behave like compass needles.47. Which of the following factors might affect Dr. Begall's research result?A. Rainfall.B. Earthquakes.C. Location.D. Cost.48. What is the major finding of Dr. Begall's study?A. Cattle point north-south.B. Magnetism can't be studied scientifically.C. Animals prefer to look south.D. Google Earth is a reliable research tool49. Why couldn't the researchers get the answer to their research questions?A. Many cattle in their study were sitting on the ground.B. The cattle constantly change directions to avoid wind chill.C. There is magnetic difference between the two hemispheres.D. They couldn't tell a cow's head from its tail in the satellite pictures.(B)Astronauts often work 16 hours a day on the space shuttle in order to complete all the projects set out for the mission. From space, astronauts study the geography, pollution, and weather patterns on Earth. They take many photographs to record their observations. Also, astronauts conduct experiments on the shuttle to learn how space conditions, such as microgravity, affect humans, animals, plants, and insects. Besides working, regular exercise is essential to keep the astronauts healthy in microgravity.Astronauts sometimes go outside the shuttle to work. They are protected by a space suit from the radiation of the sun. Meanwhile, the space suit provides necessary oxygen supply and keeps the astronauts from feeling the extreme heat or cold outside the shuttle. When the mission is over, the crew members get ready to return to Earth. The shuttle does not use its engines for a landing. It glides through the atmosphere. When the shuttle touches the land, a drag parachute opens to steady the aircraft, get the speed right, andhelp the brakes on the landing-gear wheels to bring it to a complete stop.50. The passage is mainly about _________.A. how astronauts fly the space shuttleB. how a space mission is completedD. how far astronauts travel in spaceC. how a space shuttle is constructed51. According to the passage, which of the following is NOT true?A. The astronauts need a space suit to work outside the shuttle.B. The astronauts keep themselves warm in a apace suit.C. The astronauts need a space suit to survive in space.D. The astronauts can hardly breathe in a space suit.52. A parachute need to be opened because it can _________.A. slow down the shuttleB. stop the shuttle from falling []C. make the shuttle get closer to EarthD. help the shuttle glide through the atmosphere(C)Jet lag, caused by traveling between time zones, is becoming a common problem for frequent travelers for 49 percent it is only a nuisance and for 45 percent it is a real problem. It is caused by disruption(混乱) to the internal biological clock, and may lead to digestive problems, tiredness, and sleep disruption.Generally speaking, our biological clock is slightly disturbed if we just move into the next time zone, but jet lag becomes a problem once we have passed through three or fourtime zones. The body takes about one day to get over each hour of time difference. But theseriousness of jet lag problems also depends on our direction of travel. If we go north or south, we won't notice any difference, because there is usually no time zone change. However if we travel west we will be in advance of ourselves as far as our internal clock is concerned, and problems may arise. A west-to-east journey, on the other hand, makes uslate compared to the local time. It often demands even greater effort in adjustment since we are not quick enough to catch up with the new time schedule. Therefore, a trip from NewYork to Los Angeles often causes fewer problems than a Los Angeles-New York trip.53. A traveler who suffers from jet lag has problems in _________A. adjusting his biological clockB. knowing the direction of a jetC. knowing the distance of his flightD. getting used to the weather of a new place54. If one travels across three time zones, he needs about _________ hours to get over his jet lag problemA. 24B. 36C. 48D. 7255. A person may suffer the most serious case of jet lag when he takes a _________ journey.A. east-to-westB. west-to-eastC. north-to-southD. south-to-north(D)There seems never to have been a civilization without toys, but when and how they developed is unknown. They probably came about just to give children something to do. Inthe ancient world, as is today, most boys played with some kinds of toys and most girls with another. In societies where social roles are rigidly determined, boys pattern their This mothers. of after the tasks their girls fathers of the play after activities their andis true because boys and girls are being prepared, even in play, to step into the roles and responsibilities of the adult world.What is remarkable about the history of toys have remained are same. The changes have been mostly in terms of craftsmanship, mechanics, and technology. It is the universality of toys with regard to their development in all parts of the world and their persistence to the Arctic peoples, generally the same kinds of toys appeared. Variations depended onlocal customs and ways of life because toys imitate their surroundings. Nearly every civilization had dolls, little weapons, toy soldiers, tiny animals and vehicles. Because toys can be generally regarded as a kind of art form, they have not been subject to technological leaps that characterize inventions for adult use. The progress from thewheel to the oxcart to the automobile is a direct line of ascent (进步). The progress froma rattle (拨浪鼓) used by a baby in 3000 BC to one used by an infant today, however, isnot characterized by inventiveness. Each rattle is the product of the artistic tastes ofthe times and subject to the limitations of available materials.Answer the questions in COMPLETE sentences.1. A civilization can't develop without toys, can it?2. Why are the toys most boys play with different from those that girls play with?3. What is remarkable about the history of toys?4. Why do children indifferent places play various toys?5. Can you give some specific examples of the toys played by children in nearly every country according to the passage? (at least two examples)Paper TwoⅠ.Word transformation 10%1. He has never felt _________ for his hometown because he left his hometown when he was only 1 year old.2. David Copperfield is one of the most famous _________ in the world. He can make a tall building disappear in front of the audience.3. The employee tried his best to _________ his boss at the meeting but his boss didn't pay any attention to him.4. She likes Greek myths while I like Chinese ones. It is just a matter of personal _________. []5. When I was in may most difficult time, he helped me a lot. He is a very _________partner.6. Mathilde's life changed _________ after she lost her friend's diamond necklace.7. When the two girls are talking about their favorite stars, they usually have a/an _________ argument with each other.8. This room is very cool. It must be _________.9. For parents, nothing is more important than their children's _________.10. In fact, the police officer doesn't believe the woman's story. It is not _________ at all.Ⅱ. Fill in the blanks with the given verbs in their proper forms 10%1. --- What 1 Ralph 1 in his room now ? (do)--- I'm not sure. But I 2 (hear) him 3 (chat) with someone online when I4 (pass) his room5 minutes ago.2. By the time John 5 (be) 5 years old, he 6 (live) in Germany with his parentsfor 3 years.3. --- Where is Martin? I can't find him anywhere.--- Don't worry. I'll ask him 7 (contact) you the moment I 8 (see) him.4. Dexter 9 (not talk) to his deskmate since they 10 (quarrel) over an eraseryesterday morning.Ⅲ. Fill in the blanks with the first letter given 8%If we were asked exactly what we were doing a year ago, we should probably have to say that we could not remember. But if we had kept a book and had written it down, we should be able to give an answer to the question.It is the s 1 in history that many things have been f 2 because we do not haveany account of them. Sometimes men did keep a record of the most important things in theircountry, but often it was destroyed by fire or in a war. Sometimes there was never any writtenrecords at all because the people of that time and place did not know how to write. For example, we know a great d 3 about the people who lived in China 4000 years ago, becausethey could write and leave written records for those who lived after them. But we knowa4 nothing about the people who lived even 200 years ago in central Africa because theyhad not learned to write. Sometimes, of course, even if the people cannot write, they mayknow something of the p 5 . They have heard about it from older people, and often songsand dances and stories have been made about the most important happenings, and these havebeen sung and acted and told for many g 6 for most people are proud to tell what theirfathers did in the past. We may call this ‘remembered history'. Some of it has now been written down. It is not so exact or so v 7 to us as written history is, because wordsare much more e 8 changed when used again and again in speech than when copied in writing.But where there are no written records, such spoken stories are often very helpful. Ⅳ. Sentence transformation 5%1. Michael was so diligent that he kept working although he was seriously ill. Michael was so diligent that he kept working ______ ______ ______ ______.2. It's possible for us to shop at home with the development of the Internet.The development of the Internet ______ ______ ______ ______ ______ ______ shop at home.3. He can't make us believe that he is able to finish the project alone.He can't ______ ______ ______ ______ ______ to finish the project alone.4. Can they catch the express train to Nanjing? I doubt it. (两句并一句)5. I think that it's great fun to go on an outing with friends.I think ______ great fun ______ ______ on an outing with friends.Ⅴ. Translation 7%1. 全班同意我们下周五举办派对的安排。
上海大学附属学校 2020年八年级上学期 期中考试英语试卷含答案
2020学年第一学期八年级英语期中测试卷Part 1 Listening （第一部分听力）（共25分）I. 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. _________II. 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): (7分)( ) 7. A. She is watching TV. B. She is doing his homework.C. She is cleaning his room.D. She is listening to the radio.( ) 8. A. It is boring. B. It is interesting. C. It is useful. D. It is helpful.( ) 9. A. In a taxi. B. At home. C. In the office. D. On a bus.( ) 10. A. She worked hard at home. B. She learned computer.C. She went on a trip.D. She had a test.( ) 11. A. Learning English. B. Buying a birthday present.C. Having a birthday party.D. Looking for the English dictionary.( ) 12. A. 50 dollars. B. 25 dollars. C. 40 dollars. D. 20 dollars.( ) 13. A. The woman should buy new shoes.B. The woman should buy a third pair.C. The woman should borrow the shoes from others.D. The woman shouldn’t buy two pairs of shoes.III. 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)（4分）( ) 14. Hong Kong has about fourteen public beaches.( ) 15. People can get to all the beaches by bus.( ) 16. You will swim safely if you remember these instructions.( ) 17. You can’t swim when you feel hungry and tired.IV. Listen to the passage and fill in the blanks. (根据你听到的内容，完成下列句子，每空格限填一词):（8分）18. Sometimes people give _________ gifts in Japan, but they are not _________.19. Many people have _________ things and don’t want too many gifts _________.20. In Canada, many people will _________ _________ a park bench or a tree to help remember aperson.21. In the USA, some people ask their families and friends to give money to charity _________________ buy them gifts.Part 2 Vocabulary and Grammar(第二部分词汇和语法)（共35分）II. Choose the best answer (选择最恰当的答案) (共13分)22.Which of the underlined parts in each sentence has a different sound from the other three?A) He dealt with the problem in a highly professional way.B) Only later did she realize her mistake.C) I have read this book twice.D) A young woman admitted three theft charges and was put into prison for two years.23. Yesterday is ________ unusual day, but today is ________ usual day.A) a, a B) an, an C) an, a D) a, an24. Friends tend to be highly similar_________ one another.A) on B) in C) to D) for25. Mother came into my study with a cup of milk in one of her hands, and an apple in ________.A) the others B) other C) the other D) another26. is one of ________ shopping websites in China.A) large B) larger C) largest D) the largest27. Two ________ were talking with students in the office when the fire happened.A) woman teachers B) woman teacherC) women teacher D) women teachers28. For the safety, everyone ________ obey the traffic rules when he is driving or walking.A) need B) must C) may D) could29. The bag of rice weighs _______. The old lady can’t take it upstairs.A) five kilograms and half B) five and half kilogramsC) five and a half kilogram D) five kilograms and a half30. When Ding Junhui finally won the game, his fans looked ________.A) happily B) well C) exciting D) excited31. Have you been to Australia ?Yes, I ________ there with my family last year.A) go B)went C) have been D)will go32. We saw Lucy ________ a walk with her parents in the park last night.A) to have B) had C) having D) has33. Wendy is good at all the lessons. I often ask her ____ me with my lessons.A)help B) helps C) to help D) helping34. The young man________ his bag and showed us that he didn’t steal anything from us.A) went down B) went off C) held on D) held outIII. Complete the following passage with the words or phrases in the box. Each word or phrase can only be used once（将下列单词或词组填入空格。