错题重做——期中复习(4)(学生版11.6)

初二提高期中复习题A.interesting anythingB.anything interestingC.something interestingD.interesting somethingThere isn't in today's newspaper.1 A.something differentB.different somethingC.something differenceD.difference somethingI want to do .2 A.had; something interestingB.has; everything interestingC.have; anything interestingD.was having; interesting somethingOn New Year's day, everyone a good time and especially impressed those kids a lots.3 A.Hardly B.Nearly C.Always D.Almost—How often do you exercise?— ever. Because Iam very busy with my work.4 A.long B.often C.soon D.much— How do you play basketball?— Every day. But I hardly ever play soccer.5 A.hardly; hard B.hardly; hardly C.hard; hardly D.hard; hard—What terrible weather!—It rained so that people could go out.6 A.much well, as well as B.better, as good asBob swims than I, but he doesn't swim my brother.7一、单选（30'）C.better, so well asD.better, so good asA.The better ；the harderB.The harder ；the betterC.The hard ；the betterD.The harder ；the goodRemember, everyone. you work at English, result you'll get.8 A.good; hard B.better; hard C.better; harder D.good; harder —Who's at English than Tara?—Tina is. She works much .9 A.early B.earlier C.earlist D.as early asLi Ling gets up than me.10 A.much faster than; lessB.more slowly than; lessC.as fast as; moreD.as slowly as; moreJack drives Amy, so it will take Jack time to go to the hotel.11 A.clean B.cleaner C.the cleaner D.the cleanestIf more people give up driving cars, the air will get much in a few years.12 A.dirty B.dirtier C.clean D.cleanerTo make rivers than before, everybody is supposed to protect them.13 A.become, to take B.become, take C.to become, take D.to become, to take A businessman from Zhejiang Province plans the first Chinese space tourist by paying$200,000 the 3.5-hour ride at the end of 20.14 A.watching; seeing B.to watch; seeing C.watching; to see D.to watch; to see —I can't stand this boring show anymore!—Me too! I expect a more interesting one tomorrow.15The idea seems , but we need .16A.well, to try it outB.good, to try out itC.well, try it outD.good, to try it out A.help B.helps C.helping D.to helpWang Mei is very kind. She is always ready others.17 A.well B.good C.better D.bestOf all the ball games, I like baseball . It's really my favorite.18 A.far B.farther C.farthest D.the most farWho jumped of all?19 A.much B.well C.better D.best—Which do you prefer, watching TV or playing cards?—Neither. I like computer games .20 1. A.exerciseB.adviceC.workD.peace 2. A.thinkB.worryC.talkD.know 3. A.goB.riseC.changeD.take 4. A.beginsB.closesC.standses 5. A.look aroundB.go backC.warm upD.get up 6. A.strange fortable C.important D.relaxingHow do you usually go to school? Do you ride a bike? If you do, you must be careful whenyou ride it. Here is some 1 for you.● You must 2 about the traffic lights. Green means "go"; red means "stop"; yellowmeans that the lights will 3 to red.● You must keep to the side when a car 4 on a small road. We must stop to 5 before we cross the road. It's very 6 because there are many cars on the road.● 7 you ride in a pedestrian(行人）area, remember that the way is for pedestrians.● You shouldn't take other people 8 your bike when you ride. And don't ride side by side with 9 friends.● There are lots of cars on the road, so it's 10 to ride behind or next to cars.21二、完形填空（30'）7. A.AfterB.IfC.AndD.But 8. A.aboutB.onC.atD.with 9. A.myB.hisC.theirD.your 10. A.dangerous B.easy C.successful D.slow1. A.writeB.listenC.practiceD.teach 2. A.disappearedB.spreadC.forgotD.left 3. A.doneB.happenedC.goneD.made 4. A.illnessB.fearlessnessC.kindnessD.unhappiness 5. A.byB.forC.withD.at 6. A.itB.itsC.it'sD.it is 7. A.memoryB.discoveryC.truthD.accident 8. A.remindingB.thinkingC.remindedD.thought 9. A.actionB.turnsC.risksD.pride 10. A.note B.dandelion C.sunflower D.dictionaryWhen I was in the third grade, I was picked to be the princess in the school play.For weeks my mother helped me 1 my sentences. But once during a performance,every word 2 from my head. My teacher asked me to change roles and be the narrator （解说员）. Though I didn't tell my mother what had 3 that day, she felt my 4 and asked if I wanted to take a walk in the yard.It was a lovely spring day. We could see dandelions （蒲公英）coming out through the grass, just like a painter had touched our woods and fields with bits of gold. I watched my mother carelessly bend down （弯腰） 5 some flowers. "I think I am going to dig up all the wild grass," she said. "But I like dandelions, all flowers are beautiful—even dandelions!" I said.My mother looked at me seriously. "Yes, every flower shines in 6 own way. And that is true of people, too,"she said. She had guessed my pain. I started to cry and told her the 7 . "You will be a beautiful narrator,"she said, 8 me of how much I loved to read stories aloud to her.Over the next few weeks, I learned to take 9 in the role. The big day finally came. A few minutes before the play, my teacher came over to me. "Your mother asked me to give this to you,"she said, handing me a 10 . After the play, I took the flower home, laughing that I was perhaps the only person who would keep such wild grass.22三、阅读理解（40'）Dear David.Hi, my name is Rebecca and I am your new pen pal. I'm ten years old, and I live in Barcelona, Spain. I'm in Grade Four in Saint Michael Elementary School.On weekdays, I get up at 6'clock. The school starts at 7:30 in the morning. I have my lunch at school cafeteria and I usually leave school at 3:30 in the afternoon. I amgood at math. I also like history and geography but my favorite subject isscience. I like playing basketball very much and I am good at it. I also likefootball and swimming.On Saturday I usually study at home. Sometimes I go outside with my parents and my sister. On Sundays, I often go to the movie theater with my friends. We like movies.Please write and tell me about you and your life. What's your family like? What do you like doing in your free time?I hope to hear from you soon.Best wishes,Rebecca23 A.Grade Two B.Grade Three C.Grade Four D.Grade FiveRebecca is in .（1）A.6:00 am B.6:30 am C.7:00 am D.7:30 amThe school starts at .（2）A.match B.science C.history D.geographyRebecca's favorite subject is .（3）A.friends B.parents C.sister D.classmatesRebecca goes to the movie theatre with her .（4）BI was the typical "I can't" child — whatever my mother told or asked me to do was immediately followed by my cry, "I can't." As a result, very few tasks or goals that I set out to achieve were ever completed.One evening, my mother called me into the family room. "I want you to read this article," Mother began. "It's about Mario Thomas. She tells how a simple poem that she was forced to learn by her father changed her life. She went from saying 'I can't' to 'I can'. According to this article, she was able to reorganize her life and her career by learning the principles （原则）in the poem.”I took the small magazine from Mother and looked down at the pages. There was Mario 一my idol. Beside her photo was the poem my mother had spoken of, a simple poem entitled, "I Can". "I want you to memorize that poem," Mother said firmly. "Mama," I belly-ached. "I can't24learn that poem. It's too long.""It's not too long and you can learn it. I want you to know it perfectly by this time tomorrow,"said my mother. Unwillingly, I went back to my bedroom with the magazine. With a heavy heart,I threw myself into the bed and began my task."Can't is a word that is the enemy to ambition", I began. I repeated the line. I repeated it again and again. "An enemy ambush to shatter your will..." I continued the process until I proudly recited the poem the following evening. It has now become my principle. Mario Thomas did not know me, but her story forever changed my life.Saying "I can" helped me to get through the worst moments of my life. Saying "I can" encouraged me to complete things I would have otherwise seen as out of my reach. A simple poem learned at seven is a poem that will support me to seventy-seven, maybe even longer.A.read an articleB.meet MarioC.write a poemD.take photosOne evening my mother asked me to_________ .（1）A.I was hungry B.I was relaxed C.I felt unhappy D.I ate too muchThe underlined part I belly-ached in Paragraph 3 probably means .（2）A.repeated the lines on TVB.read more stories about MarioC.proudly recited the poemD.had a long talk with my motherOn the following evening, I_________ .（3）A.B.C.D.What can we learn from the passage?Mario is very popular among teenagers.I become interested in poems all my life.Mario always encourages me to work hard.Saying "I can" has helped me get over difficulties.（4）AHave you ever read Alice's Adventures in Wonderland? It was written by Lewis Carroll. He was an English writer, poet, scientist, photographer, and priest. His real name was Charles Lutwidge Dodgson, and Lewis Carroll was his pen name. He was born in 1832 and died in 1898.He is most famous for writing two children's fantasy books about a young girl called Alice.They were titled Alice's Adventures in Wonderland(1865) and through the looking-Glass(1872).He also wrote two famous poems called "The Hunting of the Snark" and "The Jabberwocky". What is important about these poems is that he made up many new words to use in them. He was an expert at "word play" and used words in many different ways. Some of these ways were quite new. And this has influenced members of the literary elite who are well25educated about English. Many people still study his work and his life today.Although they seem to have been written for children, Lewis Carroll's books and poems have been enjoyed by people of all ages. If you have not read Alice's Adventures in Wonderland, which is also referred to by the short title Alice in Wonderland, you should read it soon. No matter how old you are, you will find it exciting and enjoyable.A.Charles Lutwidge Dodgson.B.Santa Claus.C.Diana Thimblebottom.D.Jane Fleeb.Who wrote Alice's Adventures in Wonderland?（1）A.One. B.Two. C.Three. D.Four.How many poems did Lewis Carroll write?（2）A.only childrenB.young peopleC.only adultsD.people of all agesFrom the passage, we know like reading Alice in Wonderland.（3）A.a woman writerB.a Japanese writerC.an American writerD.an imaginative writerAccording to the passage, we can infer Lewis Carroll was .（4）BIn British schools, kids have cooking classes. Maybe you think this is strange. School is for math and science, isn't it? A teenager from UK named Tom had the same idea. In the past, Tom didn't help out at home and his mom wasn't very happy with him."I love cooking now and I think I'm really good at （擅长）it. It isn't difficult and it's great fun!I learn how to cook. And it's great to be able to make something for my family to enjoy." Tom says. Today, things are different and she is very happy. Tom is like any other teenagers. He goes to school, does his homework, meets his friends and enjoys doing sports. But between 5:30 and 6: 30 from Monday to Friday, Tom does something different. He cooks dinner for all the family: mom, dad, younger brother Joe and older sister Emma."First I taught Tom how to cook easy meals like pizza or egg and chips. Yesterday he made vegetable soup. It was very good." Tom's mom says.The idea of cooking classes is for young people to learn life skills. When they leave home,they don't have to go to McDonald's every day. Math and science are important, of course, but they also need other skills to help them in today's world.26 A.dancing B.reading C.cooking D.swimmingIn British schools, kids have classes.（1）A.5:00 and 6:00 B.6:00 and 7:00 C.5:30 and 6:30 D.6:30 and 7:30Tom cooks dinner for his family between from Monday to Friday.（2）A.He loves it.B.It is difficult.C.It is no fun.D.He isn't good at it.What does Tom think of cooking now?（3）A.to help with houseworkB.to learn life skillsC.to do something differentD.to be good cooksThe idea for cooking classes is for young people .（4）DThese days there are a lot of possibilities to be always connected to family and friends.Now that I have just moved to France, this can be very convenient. I can ring my sister who lives in Los Angles on Viber, or I can Skype my parents or friends back in England for a chat.However, sometimes the convenience and dependability of technology can be intrusive .Even the most out-going people sometimes need some "down time" to calm down on their own and get relaxed. This is something that I consider necessary and healthy. After all, you have to live with yourself for the rest of your life, so you'd better know how to enjoy your own company. It can be a good thing to have time to yourself to collect your thoughts and free your feelings. Today I went for a walk by myself around the lake and just day-dreamed. It was so relaxing and enjoyable and helped me let go of my bad emotions.However, somehow it seems rude or perhaps makes people feel that you're upset to say to people: "I'm going to go and spend some time by myself." And often when we are spending time 'alone', we are actually connected with a piece of electrical equipment. We try to make something into a Facebook or a Tweet to attract our friends, or we scroll （滚屏） through Facebook nosing into other people's lives or seeing what friends are up to. We judge ourselves and other people by photos they put online, so we can tell how much fun they are having compared to us. This is an age when we can get so much surface information about other people's lives, but being wrapped （包裹）up in what other people are doing or always thinking about other people's recognition （认可） of us can be quite unhealthy. Perhaps these days we forget about the simple pleasure of spending time just for us.Having said all that, I also think that spending too much time by yourself can separate you from others. I suppose it is important to find a good balance between spending valuable time by yourself and with other people.27 A.Interruptive. B.Helpful. C.Unsatisfactory. D.Important.What does the underlined word "intrusive" probably mean?（1）A.It's the only way to get relaxed.B.It makes other people feel upset.C.It's necessary and healthy for people.D.It makes out-going people feel lonely.What does the writer think of being alone properly?（2）A.B.C.D.The writer agrees .it's important to know what other people think of usit's harmful to always compare ourselves with otherstechnology helps us to judge and improve ourselvestechnology helps us to know about other people clearly（3）A.B.C.D.What's the best title for the passage?Is technology really good for us?How can we keep in touch with others?What is the best way to enjoy ourselves?Do we spend enough time truly by ourselves?（4）。

•部编版2022-2023学年六年级下册语文期中复习专题：04 词形一、单选题1．下列字词书写不正确的一项是（）A．哲理幅度坚难座无虚席B．喧哗冒险堂皇狂风暴雨C．英俊附庸薄弱养尊处优D．机敏附和精羡惊心动魄【答案】A【知识点】词形【解析】【分析】A.艰难：困难、艰巨；犹劳苦。

故“坚难”的“坚”错误；BCD正确。

故答案为：A【点评】本题考查了学生辨析错别字的能力，根据平时所学生字及平时的积累，结合具体语境，对每个词中的字进行分析完成即可。

2．下列词语字形无误的一项是（）A．赤裸裸一番锻练机敏名义B．惊羡幅度附合暄哗附庸C．挪移蒸融幸而基业优雅D．消受堂皇薄弱涔涔钮扣【答案】C【知识点】词形【解析】【分析】A.有误，“锻炼”：通过体育活动增强体质。

故“锻练”的“练”错误。

B.有误，“喧哗”：形容声音大而杂乱、嘈杂。

故“暄哗”的“暄”错误。

C.正确。

D.有误，“纽扣”：扣子，缠绕、圈结、弯曲、拴系的结子打了扣子的细绳子。

故“钮扣”钮错误。

故答案为：C【点评】此题是考查同音字、形近字的辨析，改正错别字。

认真分析词语中哪个字用错了，应该怎样改正。

成语的用字都是固定不变的，不能随便改动。

3．（）下列词语字形不正确的一组是（）A．鞭炮栗子寺院身无分文B．嘟嚷浓绸糊涂赞叹不已C．腊月彩绘元宵随心所欲D．粉碎融掉恐怖能歌善舞【答案】B【知识点】词形【解析】【分析】A、C、D项正确；B项有误。

“浓绸”有误，应改为“浓稠”，意思是：指液体的密度大、浓度高，粘稠。

故答案为：B【点评】此类题目考查小学阶段学生对每个单元生字词的掌握，尤其是对于一些形近字的区分和词语的理解掌握。

注意区分一些字的详细之处，仔细核对。

4．下面的词语书写有误的一项是（）A．热情自傲鞭炮眨眼B．通屑间断截然燃放C．小贩彼此贺年骆驼D．恰好一律彩绘分外【答案】B【知识点】词形【解析】【分析】阅读各项中词语，ACD三项中词语书写都是正确的；B项中“通屑”应写作“通宵”。

2022-2023学年浙教版数学八上期中复习专题4 三角形全等的性质与判定一、单选（每题2分，共24分）1．（2019八上·嵊州月考）下列图形是全等图形的是（）A．B．C．D．2．（2021八上·温州期中）如图，△ABC≅△DEC，点B，C，D在同一条直线上，CE=2，CD=4，则BD的长是（）A．4.5B．5C．5.5D．63．（2021八上·诸暨期中）已知图中的两个三角形全等，则∠α等于（）A．50°B．60°C．70°D．80°4．（2019八上·鄞州期中）某实验室有一块三角形玻璃，被摔成如图所示的四块，胡老师想去店里买一块形状、大小与原来一样的玻璃，胡老师要带的玻璃编号是()A．1B．2C．3D．45．（2021八上·温州期中）如图，∠ABC∠∠DEF，BC＝12，EC＝7，则CF的长为（）A．5B．6C．7D．86．（2021八上·义乌期中）如图，已知∠OAB∠∠OCD，若OA＝4，∠AOB＝35°，∠OCA＝62°，则下列结论不一定正确的是（）A．∠BDO＝62°B．∠BOC＝21°C．CD∠OA D．OC＝47．（2021八上·温州期中）下列命题是假命题的是()A．等底等高的两个三角形面积相等B．两个全等三角形的面积相等C．面积相等的两个三角形全等D．等腰三角形底边上的高线和中线互相重合8．（2021八上·温州期中）如图，BP平分∠ABC，D为BP上一点，点E，F分别在BA，BC上，且满足DE=DF．若∠BED=140°，则∠BFD的度数是（）A．40°B．50°C．60°D．70°9．（2021八上·鄞州期末）如图，在OA，OB上分别截取OD，OE使OD＝OE，再分别以点D、E为圆心，大于12DE长为半径作弧，两弧在∠AOB内交于点C，射线OC就是∠AOB的角平分线.理由是连结CD，CE，证∠COD∠∠COE得∠COD＝∠COE.证∠COD∠∠COE的条件是（）A．SAS B．AAS C．ASA D．SSS10．（2022八上·柯桥期末）如图，已知AB=AD，AC=AE，若要判定∠ABC∠∠ADE，则下列添加的条件中正确的是（）A．∠1=∠DAC B．∠B=∠D C．∠1=∠2D．∠C=∠E 11．（2021八上·台州期中）如图，已知∠1=∠2，添加一个条件，使得△ABC∠ △ADC，下列条件添加错误的是（）A．∠B=∠D B．BC=DC C．AB=AD D．∠3=∠4 12．（2021八上·诸暨期中）下列条件中，不能判定两个三角形全等的是（）A．有一个锐角相等和一组边相等的直角三角形B．底边和底边上高线对应相等的等腰三角形C．顶角和底边相等的等腰三角形D．一条直角边和一条斜边对应相等的直角三角形二、解答题（共12题，共84分）13．（2019八上·余姚期中）如图甲，正方形被划分成16个全等的三角形，将其中若干个三角形涂黑，且满足下列条件：∠涂黑部分的面积是原正方形面积的一半；∠涂黑部分成轴对称图形．如图乙是一种涂法，请在图1～3中分别设计另外三种涂法．（在所设计的图案中，若涂黑部分全等，则认为是同一种涂法，如图乙与图丙）14．（2020八上·吴兴期中）图①和图②是两张形状、大小完全相同的方格纸，方格纸中的每个小正方形的长均为1．请分别画出符合要求的图形，所画图形的各顶点必须与方格纸中的小正方形的顶点重合．（1）请在图①中出一个面积为3的等腰三角形；（2）请在图②中画出一个与∠ABC全等的三角形ABD．15．（2021八上·温州期中）已知：如图，在∠ABC、∠ADE中，∠BAC＝∠DAE＝50°，AB＝AC，AD ＝AE，连结BD、CE，BD所在直线交CE、AC分别于点F、G.（1）求证：∠BAD∠∠CAE；（2）求∠BFC的度数.16．（2021八上·余杭月考）如图∠ADF∠∠BCE，∠B＝40°，∠F＝22°，BC＝2cm，CD＝1cm.求：（1）∠1的度数；（2）AC的长.17．（2021八上·拱墅期中）已知：点O到∠ABC的两边AB、AC所在直线的距离OE、OF相等，且OB＝OC．（1）如图，若点O在边BC上，求证：AB＝AC；（2）如图，若点O在∠ABC的内部，则（1）中的结论还成立吗？若成立，请证明；若不成立，说明理由；（3）若点O在∠ABC的外部，则（1）的结论还成立吗？请画图表示．18．（2021八上·鹿城期中）问题情境：如图1，在直角三角形ABC中，∠BAC＝90°，AD∠BC于点D，可知：∠BAD＝∠C（不需要证明）；（1）特例探究：如图2，∠MAN＝90°，射线AE在这个角的内部，点B、C在∠MAN的边AM、AN上，且AB＝AC，CF∠AE于点F，BD∠AE于点D.证明：∠ABD∠∠CAF；（2）归纳证明：如图3，点B，C在∠MAN的边AM、AN上，点E，F在∠MAN内部的射线AD 上，∠1、∠2分别是∠ABE、∠CAF的外角.已知AB＝AC，∠1＝∠2＝∠BAC.求证：∠ABE∠∠CAF；（3）拓展应用：如图4，在∠ABC中，AB＝AC，AB＞BC.点D在边BC上，CD＝2BD，点E、F 在线段AD上，∠1＝∠2＝∠BAC.若∠ABC的面积为3，则∠ACF与∠BDE的面积之和为. 19．（2021八上·瑞安期中）已知：如图，点D在∠ABC的外部，点C在DE边上，BC与AD交于点O.∠1＝∠2＝∠3，AB＝AD.求证：∠ACE是等腰三角形.证明：∵∠1＝∠3（），∴∠1+∠CAD＝∠3+∠CAD，即∠BAC＝∠_▲_.∵∠1＝∠2，∠▲_＝∠COD，∴180°﹣∠1﹣∠AOB＝180°﹣∠2﹣∠COD，即∠B＝∠D.又∵AB＝AD，∴∠ABC∠∠ADE（），∴AC＝AE（），∴∠ACE是等腰三角形（）.20．（2021八上·绍兴期中）已知：如图1，线段AD＝5，点B从点A出发沿射线AD方向运动，以AB为底作等腰∠ABC，使得AC＝BC＝35AB．（1）如图2，当AB＝10时，求证：CD∠AB；（2）当∠BCD是以BC为腰的等腰三角形时，求BC的长；（3）当AB＞5时，在线段BC上是否存在点E，使得∠BDE与∠ACD全等，若存在，求出BC的长；若不存在，请说明理由；（4）作点A关于直线CD的对称点A′，连结CA′当CA′∠AB时，求CA′＝（请直接写出答案）．21．（2021八上·绍兴期中）【问题情境】在等边∠ABC的两边AB，AC上分别有两点M，N，点D为∠ABC外一点，且∠MDN＝60°，∠BDC ＝120°，BD＝DC．【特例探究】如图1，当DM＝DN时，（1）∠MDB＝度；（2）MN与BM，NC之间的数量关系为；（3）【归纳证明】如图2，当DM≠DN时，猜想MN与BM，NC之间的数量关系，并加以证明．（4）【拓展应用】∠AMN的周长与∠ABC的周长的比为．22．（2021八上·萧山期中）已知：如图1，在等边三角形ABC的BC，AC边上各取一点P，Q，使BP=CQ，AP，BQ相交于点O．（1）求证：∠ABP∠∠BCQ；（2）求∠BOP的度数；（3）如图2，沿AB将∠ABC折叠得到∠ABD连结OD交AB于点H，求∠BOD的度数；（4）请你直接写出DO、AO、BO之间的数量关系.23．（2021八上·金东期中）如图1，已知直线l垂直线段AB于点B，点P是直线l上异于点B的一个动点，线段AP绕点P顺时针旋转90°得到线段CP，线段BP绕点P逆时针旋转90°得到线段DP，连结AC，BD，CD，CD与直线l交于点E，AB=4.（1）如图2，过点C作直线l的垂线，垂足为F.①求证：△ABP≌△PFC.②求PE的长.（2）在点P的运动过程中，点P，E，B三点中，是否存在其中一点恰是另外两点为端点的线段的中点，若存在，求出相应CD的长.若不存在，说明相应理由.24．（2021八上·温州期中）问题情境：如图①，在直角三角形ABC中，∠BAC＝90°，AD∠BC于点D，可知：∠BAD＝∠C（不需要证明）；（1）特例探究：如图②，∠MAN＝90°，射线AE在这个角的内部，点B、C在∠MAN的边AM、AN上，且AB＝AC，CF∠AE于点F，BD∠AE于点D.证明：∠ABD∠∠CAF；（2）归纳证明：如图③，点B，C在∠MAN的边AM、AN上，点E，F在∠MAN内部的射线AD上，∠1、∠2分别是∠ABE、∠CAF的外角.已知AB＝AC，∠1＝∠2＝∠BAC.求证：∠ABE∠∠CAF；（3）拓展应用：如图④，在∠ABC中，AB＝AC，A B＞BC.点D在边BC上，CD＝2BD，点E、F在线段AD上，∠1＝∠2＝∠BAC.若∠ABC的面积为3，则∠ACF与∠BDE的面积之和为.答案解析部分1．【答案】C【知识点】全等图形【解析】【解答】解：A、两个圆不一样大，不是全等图形，不符合题意；B、两个三角形最大角分别是直角和钝角，不符合题意；C、两个图形放置的方位不一致，但图形的大小一样，形状相同，是全等图形，符合题意；D、两个正方形的大小不一样，不是全等图形；故答案为：C .【分析】只有形状相同，大小相等的两个图形才全等, 据此分别分析和判断.2．【答案】D【知识点】三角形全等及其性质【解析】【解答】解：∵△ABC≅△DEC，∴BC=EC=2，AC=CD=4，∴BD=BC+CD=2+4=6.故答案为：D.【分析】由全等三角形的性质可得BC=EC=2，AC=CD=4，然后根据BD=BC+CD进行计算. 3．【答案】C【知识点】三角形内角和定理；三角形全等及其性质【解析】【解答】解：∵两个三角形全等，∴∠α＝180°﹣50°﹣60°＝70°.故答案为：C.【分析】根据全等三角形的对应角相等以及内角和定理进行求解.4．【答案】B【知识点】全等三角形的应用【解析】【解答】解：第一块，仅保留了原三角形的部分边，故该块不行；第二块，不但保留了原三角形的两个角还保留了其中一个边，所以符合ASA判定，所以应该拿这块去；第三块，仅保留了原三角形的一部分边，所以该块不行；第四块，仅保留了原三角形的一个角和部分边，不符合任何判定方法；故答案为：B.【分析】显然第②块中保留了原三角形的三个完整条件，根据ASA可以证出所买的三角形与原三角形全等.5．【答案】A【知识点】三角形全等及其性质【解析】【解答】解：∵∠ABC∠∠DEF，∴BC＝EF，又BC＝12，∴EF＝12，∴EC＝7，∴CF＝EF﹣EC＝12﹣7＝5.故答案为：A.【分析】由全等三角形的性质可得BC＝EF=12，然后根据CF=EF-EC进行计算.6．【答案】C【知识点】三角形内角和定理；三角形全等及其性质；等腰三角形的性质【解析】【解答】解：∵∠OAB∠∠OCD，∴OA=OC=4，OB=OD，故D不符合题意；∴∠AOB=∠DOC=35°，∵OA=OC，∴∠ACO=∠OAC=62°，∴∠AOC=180°-∠ACO-∠OAC=180°-62°-62°=56°，∴∠BOC=∠AOC-∠AOB=56°-35°=21°，故B不符合题意；∴∠BOD=∠DOC+∠BOC=35°+21°=56°；∵OB=OD∴∠BDO=∠OBD=（180°-56°）÷2=62°，故A不符合题意；∠DCO≠∠COA，∴CD不平行于OA，故C符合题意；故答案为：C.【分析】利用全等三角形的性质可求出OC的长及∠DOC的度数，可对D作出判断；同时可证得OA=OC，OB=OD，利用等腰三角形的性质可得到∠ACO=∠OAC=62°，利用三角形的内角和定理求出∠AOC的度数，即可得到∠BOD的度数，可对B作出判断；再求出∠BDO的度数，可对A作出判断；利用已知不能证明∠DCO≠∠COA，可对C作出判断.7．【答案】C【知识点】三角形的面积；三角形全等及其性质；三角形全等的判定；等腰三角形的性质；真命题与假命题【解析】【解答】解：A、根据三角形面积公式可知，等底等高的两个三角形面积相等，正确；B、∵两个全等三角形等大，∴两个全等三角形的面积相等，正确；C、面积相等的两个三角形不一定全等，如同底等高的直角三角形和等边三角形面积相等，但不全等，错误；D、等腰三角形三线合一，即底边上的高、中线和顶角平分线重合，正确；综上，C是假命题.故答案为：C.【分析】等底同高的两个三角形面积显然相等；等大的两个三角形面积显然相等；根据同底等高两三角形面积相等举一个反例，即可判断C；根据等腰三角形的性质判断D.8．【答案】A【知识点】直角三角形全等的判定（HL）；角平分线的性质【解析】【解答】解：过点D作DM∠BC于点M，DG∠AB于点G，∴∠EGD=∠FMD=90°，∵BP平分∠ABC，∴DG=DM，在Rt∠EGD和∠FMD中，{DE=DFDG=DM∴Rt∠EGD∠∠FMD（HL）∴∠DEG=∠BFD∵∠BED+∠DEG=140°，∴∠DEG=180°-140°=40°，∴∠BFD=40°.故答案为：A.【分析】过点D作DM∠BC于点M，DG∠AB于点G，利用垂直的定义可证得∠EGD=∠FMD=90°，利用角平分线的性质可知DG=DM；利用HL证明Rt∠EGD∠∠FMD，利用全等三角形的性质可得到∠DEG=∠BFD；然后利用补角的性质可求出∠BFD的度数.9．【答案】D【知识点】三角形全等的判定（SSS）【解析】【解答】解：在∠COE和∠COD中，{OC=OC OE=OD CE=CD，∴∠COE∠∠COD（SSS）.故答案为：D.【分析】由作图步骤可知：CE=CD，根据已知条件可知OE=OD，然后结合全等三角形的判定定理进行解答.10．【答案】C【知识点】三角形全等的判定（SAS）【解析】【解答】解：∵AB=AD，AC=AE，则可通过∠1=∠2，得到∠BAC=∠DAE，利用SAS证明∠ABC∠∠ADE.故答案为：C.【分析】根据角的和差关系可得∠BAC=∠DAE，然后根据全等三角形的判定定理进行解答. 11．【答案】B【知识点】三角形全等的判定【解析】【解答】解：A、在∠ABC和∠ADC中，{∠1=∠2∠B=∠DAC=AC，∴∠ABC∠∠ADC（AAS），正确，不符合题意；B、ASS两三角形不一定全等，错误符合题意；C 、在∠ABC 和∠ADC 中，{AB =AD∠1=∠2AC =AC ，∴∠ABC∠∠ADC （SAS ），正确，不符合题意；D 、在∠ABC 和∠ADC 中，{∠3=∠4AC =AC ∠1=∠2，∴∠ABC∠∠ADC （ASA ），正确，不符合题意.故答案为：B.【分析】三角形全等的判定定理有：边角边、角角边、角边角和边边边定理，逐项分析即可判断.12．【答案】A【知识点】三角形全等的判定【解析】【解答】解：当等腰三角形的底边与底边上的高对应相等时，由勾股定理可得腰长相等，则根据SSS 可判断：底边和底边上高线对应相等的等腰三角形全等，故B 不满足题意；当顶角相等时，根据等腰三角形的性质和内角和定理可得底角相等，根据ASA 或AAS 可判断C 中两个三角形全等，故C 不满足题意；利用HL 可知： 一条直角边和一条斜边对应相等的两个直角三角形全等，故D 不满足题意. 故答案为：A.【分析】根据全等三角形的判定定理进行判断.13．【答案】解：（答案不唯一）【知识点】全等图形；轴对称图形【解析】【分析】（1）抓住已知条件：涂黑部分的面积是原正方形面积的一半，只需涂黑8个三角形即可。

初中地理期中复习易错题整理(word版含
答案)
初中地理期中复易错题整理
1. 地球的自转和公转
- 地球自转一周需要多长时间？答：24小时
- 地球自转的方向是？答：从西向东
- 地球公转一周需要多长时间？答：365天左右
2. 地球的四季变化
- 造成地球四季交替的主要原因是什么？答：地球公转轨道不规则
- 北半球春分的时间是什么时候？答：3月20或21日
- 我国盛行的气候类型是什么？答：季风气候
3. 气候带和植被
- 我国南方气候带的植被以什么为主？答：以森林为主
- 气候带的划分主要是以什么为标准？答：以温度为标准
- 我国北方气候带的植被以什么为主？答：以草为主
4. 地球的内部结构
- 地壳是地球重量的几百分之一？答：40
- 地球的核心包括哪些部分？答：外核和内核
- 地球最大的火山是什么？答：夏威夷群岛的毛伊岛
5. 河流与湖泊
- 江西省最大的湖泊是哪个？答：鄱阳湖
- 黄河上游最高的瀑布是什么？答：金沙瀑布
- 长江中下游的长度约为多少公里？答：6300公里左右
6. 人口与城市
- 我国最大的沿海经济特区是哪个？答：深圳市
- 京津冀城市群的范围包括哪些城市？答：北京、天津、石家庄等
- 中国现有的直辖市有哪些？答：北京、上海、天津、重庆
以上为初中地理期中复习易错题整理及答案。

专题11.6 用一元一次不等式解决问题（专项练习）一、单选题1．（2020·浙江省杭州市萧山区高桥初级中学八年级期中）如果代数式32x-的值不小于3-，那么x 的取值范围是（ ） A ．0x ≥B ．0x >C ．12x ≤D ．12x <-2．（2021·浙江湖州市·八年级期末）某超市开展促销活动，一次购买的商品超过88元时，就可享受打折优惠．小明同学准备为班级购买奖品．需买6本笔记本和若干支钢笔．已知笔记本每本4元．钢笔每支7元，如果小明想享受打折优惠，那么至少买钢笔（ ） A ．12支B ．11支C ．10支D ．9支3．（2020·浙江杭州市·八年级期末）根据数量关系“y 与6的和不小于1”列不等式，正确的是（ ） A ．61y +>B ．61y +≥C ．61y +<D ．61y +≤4．（2020·山东日照市·九年级二模）为了奉献爱心，贡献自己的一份力量，本次新冠状病毒疫情期间，九年级4班18名团员计划在家加工2250个口罩，奉献给社区志愿者，并规定每人每天加工a 个口罩（a 为整数），干了几天以后，其中4人因特殊情况没能继续，若剩下的同学每人每天多加工3个口罩，则提前完成了这次任务，由此可知a 的值最多是（ ） A ．8B ．9C ．10D ．115．（2020·河北九年级其他模拟）x 的3倍与它的14的差不少于5，列出的关系式为（ ） A ．1354x x -≥ B ．1354x x -≤C ．1354x x ->D ．1354x x -<6．（2019·山西七年级期末）太原市出租车的收费标准是：白天起步价8元（即行驶距离不超过3km 都需付8元车费），超过3km 以后，每增加1km ，加收1.6元（不足1km 按1km 计），某人从甲地到乙地经过的路程是xkm ，出租车费为16元，那么x 的最大值是（ ） A ．11B ．8C ．7D ．57．（2020·瑞安市安阳实验中学八年级月考）商店为了对某种商品进行促销，将定价为5元的商品，以下列方式优惠销售：若购买不超过8件，则按原价付款；若一次性购买8件以上，则超出的部分打八折，小明带了70元钱，最多可以购买该商品（ ）A ．14件B ．15件C ．16件D ．17件8．（2021·全国七年级）在一次绿色环保知识竞赛中，共有20道题，对于每一道题，答对得10分，答错或不答扣5分，则至少答对多少题，得分才不低于80分？设答对x 题，可列不等式为( ) A ．105(20)80x x -- B ．105(20x x +- )80 C ．105(20)80x x -->D ．105(20x x +- )80>9．（2021·湖南益阳市·八年级期末）李老师网购了一本《好玩的数学》，让大家猜书的价格．甲说：“不少于10元”，乙说：“少于12元”．老师说：“大家说的都没有错”．则这本书的价格x （元）所在的范围为（ ） A ．10≤x ＜12B ．10≤x ≤12C ．10＜x ＜12D ．10＜x ≤1210．（2021·浙江湖州市·八年级期末）假期，小云带150元去图书馆，下表记录了他当天的所有支出，其中小零食支出的金额不小心被涂黑了，如果平均每包小零食的售价为5元，那么小云可能剩下的金额是（ ）A ．1元B ．2元C ．3元D ．4元11．（2021·广东佛山市·八年级期末）某电信公司推出两种手机收费方案．方案A ：月租费30元，本地通话话费0.15元/分；方案B ：不收月租费，本地通话话费为0.3元/分．设婷婷的爸爸一个月通话时间为x 分钟，婷婷的爸爸一个月通话时间为多少时，选择方案A 比方案B 优惠？（ ） A ．100分钟B ．150分钟C ．200分钟D ．250分钟12．（2021·全国八年级）运行程序如图所示，规定：从“输入一个值x ”到“结果是否26>”为一次程序操作，如果程序操作进行了1次后就停止，则x 最小整数值取多少（ ）A．7B．8C．9D．10 13．（2020·贵州黔西南布依族苗族自治州·八年级期末）等腰三角形的周长为20cm且三边均为整数，底边可能的取值有（）个．A．1B．2C．3D．4 14．（2021·黑龙江齐齐哈尔市·九年级期末）某校组织10名党员教师和38名优秀学生团干部去某地参观学习．学校准备租用汽车，学校可选择的车辆（除司机外）分别可以乘坐4人或6人，为了安全每辆车上至少有1名教师，且没有空座，那么可以选择的方案有（）A．2种B．3种C．4种D．5种15．（2021·广东潮州市·七年级期末）某次足球赛中，32支足球队将分为8个小组进行单循环比赛，小组比赛规则如下：胜一场得3分，平一场得1分，负一场得0分，若小组赛中某队的积分为5分，则该队必是（）．A．两胜一负B．一胜两平C．五平一负D．一胜一平一负二、填空题16．（2021·浙江杭州市·八年级期末）“比x小1的数大于x的2倍”用不等式表示为_________．17．（2020·山西七年级期末）某超市在一次促销活动中规定:消费者消费满300元或超过300元就可领取礼品.某人准备买15瓶啤酒和若干袋火腿肠，已知啤酒每瓶5元，火腿肠每袋15元，他至少买_______袋火腿肠才能领取礼品．18．（2020·全国课时练习）当x______________时，114x--的值是非负数．19．（2020·广西百色市·七年级期中）华润超市在2019年中从某商城购进一批智能扫地机器人，进价为800元，出售时标价为1200元，后来由于疫情影响，该商品积压，超市准备打折销售，但要保证利润率不低于5%，则至多可打____折20．（2020·浙江杭州市·八年级期末）一次生活常识知识竞赛一共有30道题，答对一题得4分，不答得0分，答错扣2分．小聪有2道题没答，竞赛成绩超过80分，则小聪至多答错了________道题．21．（2020·广东江门市·七年级期末）某商店对一商品进行促销活动，将定价为10元的商品，按以下方式优惠销售：若购买不超过5件按原价付款；若一次性购买5件以上，超过部分打8折，现有98元钱，最多可以购买该商品_______件．22．（2020·全国七年级课时练习）某商贩卖出两双皮鞋，相比进价，一双盈利30%，另一双亏本10%，两双共卖出200元．商贩在这次销售中要有盈利，则亏本的那双皮鞋的进价必须低于_________元23．（2020·湖北武汉市·七年级期末）某工厂计划m 天生产2160元个零件，若安排15名工人每人每天加工a 个零件（a 为整数）恰好完成．实际开工x 天后，其中3人外出培训，剩下的工人每人每天多加工2个零件，不能按期完成这次任务，则a 与m 的数量关系是_____________，a 的值至少为__________24．（2020·全国单元测试）当13x <<时，化简213x x -+-=________．25．（2020·四川巴中市·七年级期末）某同学设计了一个程序：对输入的正整数x ，首先进行奇偶识别，然后进行对应的计算，如下图所示．如果按1，2，3…的顺序依次逐个输入正整数x ，则首次输出大于100的y 的值是__________．26．（2020·江苏徐州市·七年级期末）疫情过后，地摊经济火爆，张阿姨以每件80元的价格购进50件衬衫，在地摊上以每件100元的价格出售，她至少销售__________件衬衫，所得销售额才能超过进货总价．27．（2020·河南洛阳市·七年级期末）现用甲、乙两种运输车将46吨救灾物资运往灾区，甲种车每辆载重5吨，乙种车每辆载重4吨，安排车辆不超过10辆，则甲种运输车至少需要安排 ________辆.28．（2020·洛阳市实验中学九年级月考）为改善教学条件，学校准备对现有多媒体设备进行升级改造，已知购买3个键盘和1个鼠标需要190元；购买2个键盘和3个鼠标需要220元．经过与经销商洽谈，键盘打八折，鼠标打八五折，若学校计划购买键盘和鼠标共50件，且总费用不超过1820元，则最多可购买键盘_____个．29．（2020·浙江省开化县第三初级中学八年级期中）“x 的4倍与1的差不大于3”用不等式表示为 ________________ ．30．（2020·沙坪坝区·重庆八中八年级月考）今年立冬，某超市发起限时抢购饺子活动，规定立冬前一天（11月6日）价格打九折，立冬当天（11月7日）价格打八折，其余时间不打折，11月5日王老师在该超市选购甲、乙、丙三种饺子，他发现，2千克甲，4.2千克乙的总价和1千克甲，2千克乙，3千克丙在立冬当天（11月7日）的总价相等，都等于3千克甲，2.7千克乙，1.8千克丙在立冬前一天（11月6日）总价的2027，且4千克甲立冬前一天（11月6日）的总价不低于65元，也不超过100元.如果三种饺子每千克的价格均为正整数，则王老师11月5日买2千克甲，1千克乙，1千克丙共付款______元.三、解答题31．（2021·四川绵阳市·八年级期末）受“疫情”的影响，绵阳某水果批发市场某月只购进了两批相同品种的水果，第一批用了2000元，第二批用了5500元，第二批购进水果的重量是第一批的2.5倍．且进价比第一批每千克多1元．（1）求两批水果共购进了多少千克？（2）在这两批水果总重量正常损耗10%，其余全部售完的情况下，如果这两批水果的售价相同，且总利润率不低于26%，那么售价至少定为每千克多少元？（利润率=利润成本×100%）32．（2020·沙坪坝区·重庆八中八年级月考）受疫情影响，口罩价格不断走高.3月20日当天口罩的价格是年初的1.5倍；3月20日当天，王老师购买4盒口罩比年初多花了48元.（1）那么3月20日当天口罩的价格为每盒多少元？（2）3月20日，按照（1）中的口罩价格，某售卖点共卖出1000盒口罩.3月21日，政府决定投入储备口罩并规定其销售价在3月20日的基础上下调0.7%a出售.该售卖点按规定价出售一批储备口罩和非储备口罩，该售卖点的非储备口罩仍按3月20日的价格出售，3月21日当天的两种口罩总销量比3月20日增加了20%，且储备口罩的销量占总销量的56，两种口罩销售的总金额比3月20日至少提高了1%10a，求a的最大值.33．（2021·全国八年级）某班为了开展乒乓球比赛活动，准备购买一些乒乓球和乒乓球拍，通过去商店了解情况，甲乙两家商店出售同样品牌的乒乓球和乒乓球拍，乒乓球拍每副定价48元，乒乓球每盒定价12元，经商谈，甲乙两家商店给出了如下优惠措施：甲店每买一副乒乓球拍赠送一盒乒乓球，乙店全部按定价的9折优惠．现该班急需乒乓球拍5副，乒乓球x盒（不少于5盒）．（1）请用含x的代数式表示：去甲店购买所需的费用；去乙店购买所需的费用．（结果要求化简）（2）当需要购买40盒乒乓球时，通过计算，说明此时去哪家商店购买较为合算；（3）试探究，当购买乒乓球的盒数x取什么值时，去哪家商店购买更划算？34．（2021·高台县城关初级中学）某社区要进行十九届五中全会会议精神宣讲，需要印刷宣传材料。

第4讲期中考试复习试题相对原子质量：H-1 C-12 N-14 O-16 Na-23 S-32 Cl- 35.5K-39 Mn- 55 Cu-64 Ba-137一、选择题1．近年来，我国的一些沿海或沿海城市多次出现大雾天气，致使高速公路关闭，航班停飞。

雾属于下列分散系中的A．溶液B．悬浊液C．乳浊液D．胶体2．在下列名词中，前者不包含．．．后者的是A．混合物溶液B．电解质化合物C．氧化还原反应置换反应D．化学反应离子反应3．下列装置或操作能达到实验目的的是A．取4 g NaOH加入96 mL水中B．配制100mL0.10mol/L盐酸配制4 % NaOH溶液C．读取液体体积D．干燥Cl24．下列各组离子一定能大量共存的是A．在无色溶液中：NH4+、MnO4-、SO42-、CO32-B．在含大量Ca2+的溶液中：Na+、Cl-、OH-、HCO3-C．在强碱溶液中：Na+、K+、Cl-、SO32-D．在pH =1的溶液中：K+、Mg2+、Cl-、CH3COO-5．与50 mL 0.1 mol·L－1Na2CO3溶液中c(Na＋)相同的溶液是A．10 mL 0.5 mol·L－1的Na2CO3溶液B．100 mL 0.1 mol·L－1的NaCl溶液C．25 mL 0.2 mol·L－1的Na2SO4溶液D．50 mL 0.2 mol·L－1的NaCl溶液6．下列变化中，需加入适当的氧化剂才能完成的是A．Fe → FeCl2 B．CuO → Cu C．SO3→ H2SO4D．HNO3→ NO 7．反应3Cl2 + 6KOH 5KCl + KClO3 + 3H2O中，氧化剂与还原剂的质量之比是A．1︰1 B．1︰5 C．5︰1 D．3︰28．下列关于分散系的说法中，不正确．．．的是A．分散系的稳定性比较：溶液>胶体>浊液B．分散质粒子的大小比较：溶液>胶体>浊液C．利用丁达尔效应可以区分溶液与胶体D．Fe(OH)3胶体的分散质能透过滤纸9．某实验室合成了一种可溶的金属氯化物(RCl x)，为了测定该金属氯化物的成分，研究人员做了以下实验：取物质的量浓度为0.05 mol·L-1的金属氯化物(RCl x) 溶液20 mL，使之恰好与20 mL 0.15 mol·L-1的AgNO3溶液完全反应。

【2024年春季期】五年级下册语文期中复习试卷：第四单元综合训练一、基础运用1．读拼音，写词语。

xiāo sǎméng lóng jì jìng wú yōu wú lǜbǐng xīzāo yāng mǐn jiéyì sī bù gǒu2．下列句子中的加点词语使用不恰当的一项是（）A．妈妈缝衣服时不小心一针见血．．．．，手指受伤了。

B．听了妈妈讲的这个感人的故事，我不由自主．．．．地流下了眼泪。

C．犯了错误的小明站在妈妈面前，脸涨得通红，低着头一声不吭．．．．。

D．他刚才还在不停地讲昨天的见闻，这会儿却一言不发，一副若有所思．．．．的样子。

3．将下列句中的画线部分换成合适的词语。

（1）这篇文章评论当今社会问题，真是直截了当，切中要害。

（2）病人一声不吭，他双手紧紧抓住身下的白床单，手背青筋暴起，汗珠像下雨似的往下掉，形容出汗很多。

（3）中华汉字，生动形象。

传播文明，功绩等达到了顶点，无人可以相比。

（4）当你写下“人”这个字的时候，不禁很自然地产生敬意。

（5）毛主席用食指按着紧锁的眉头，抑制不住自己的感情地喃喃着。

4．（2024六上·巩义期末）书香少年①自去自来堂上燕相对柴门月色新②已诉征求贫到骨健如黄犊走复来③忆年十五心尚孩蓬门今始为君开④花径不曾缘客扫正思戎马泪盈巾⑤白沙翠竹江村暮相亲相近水中鸥5．品析句子。

（1）他红着眼睛，像一头发怒的豹子，样子十分可怕。

这句话是对军长的描写。

此时的军长，所以像一头发怒的豹子。

（2）秘书将电报记录稿交主席签字的一瞬间，主席下意识地踌躇了一会儿，那神情分明在说，难道岸英真的回不来了？父子真的不能相见了？主席黯然的目光转向窗外，右手指指写字台，示意秘书将电报记录稿放在上面。

这句话是对主席的描写，体现了主席。

6．按要求完成练习。

（1）照样子，写词语。

一动不动（ABCB式）：、、风尘仆仆（ABCC式）：、、（2）青山处处埋忠骨，何须马革裹尸还。

期中考试错误修正
数学
1、量比较短的物体长度或者要求量得比较精确时，可以用（）作单位。

2、笔算两位数加两位数时，（）数位对齐，从（）位加起，（）位相加满十，就向（）进1。

3、2只兔子重5千克，（）只兔子重20千克（）。

A 4
B 6
C 8
语文
1、选择正确的读音
巷（xàng xiàng）口
2、请写出反义词
陌生（）
3、缩句
陈嘉庚是我国杰出的爱国华侨领袖和著名的大实业家。

4、连词成句
爬着草丛中正在一只蹒跚青蛙地
5、快乐阅读
我爱香港
香港是我国通向世界的南大门，那里有迷人的沙滩、著名的公园和繁华的街市。

浪平沙细、阳光和煦的浅水湾，是旅游、度假的好地方。

每逢节假日，人们结伴来到这里，漫步在金色的沙滩上，沐浴着轻柔的海风，倾听着海涛拍岸的声响，真是舒服极了。

香港的海洋公园举世闻名。

那里的海洋剧场，经常聚集着许多观赏海豚精彩表演的游客。

在碧波荡漾的人工湖上，几只海豚正在尽情地嬉戏，它们忽而腾空跃起，忽而悠然落下。

铜锣湾是全港三大闹市口之一。

摩天大厦鳞次栉比，商店里的各种商品琳琅满目，宽阔的街道上人流如潮。

一到夜晚，整个香港就成了灯的海洋。

港湾里闪光的灯光，像五颜六色的焰火溅落人间。

马路上一串串明亮的车灯，如同闪光长河奔腾不息。

香港，真是一颗无比璀璨的“东方之珠”。

（1）短文主要介绍了香港（）、（）、（）三处地方。

（2）用“_______________”画出第5自然段的中心句。