虹口中考补习班五角场新王牌精品小班虹口补习班

合集下载

上海初三中考辅导机构名单

上海初三中考辅导机构名单

上海初三中考辅导机构名单以下是一些在上海地区提供初三中考辅导的机构名单:
1. 东方教育,东方教育是一家知名的教育培训机构,提供全面的中考辅导课程,包括各科目的知识点讲解、习题训练和模拟考试等。

2. 新东方,新东方也是一家领先的教育培训机构,在上海有多家分校,提供中考辅导班,注重学生的基础知识巩固和考试技巧的培养。

3. 世纪优才,世纪优才是一家专注于中小学生教育的机构,提供全科的中考辅导课程,注重学生的学习方法和考试策略的培养。

4. 名师堂,名师堂是一家以名师授课为特色的教育机构,拥有一支优秀的教师团队,提供个性化的中考辅导服务,帮助学生提高成绩。

5. 清华附中,清华附中是一所知名的高中,在中考辅导方面也有一定的经验和资源,提供中考冲刺班和模拟考试等辅导课程。

6. 北大附中,北大附中是另一所享有盛誉的高中,在中考辅导方面也有一定的实力,提供全科的中考辅导课程和模拟考试等。

7. 知涯教育,知涯教育是一家专注于中小学教育的机构,提供全科的中考辅导课程,注重学生的学习方法和解题技巧的培养。

以上只是一些在上海地区提供初三中考辅导的机构名单,选择适合自己的辅导机构时,可以考虑教学质量、师资力量、学习环境和口碑等因素,同时也可以咨询其他家长和学生的意见,以做出更明智的决策。

虹口高中补习班五角场新王牌让你摆脱学习的苦恼

虹口高中补习班五角场新王牌让你摆脱学习的苦恼

Step 2. 错题回顾Homework1. —What _____ you _____ (be) when you grow up? —I'm going to be an actor.2. Father ____ (put) on his cap and went out.3. ( ) Would you like _______ some coffee?A. to haveB. havingC. haveD. has4. ( ) The Spring Festival is _________.A. on January 1stB. in January 1stC. on the first day of the first lunar monthD. in the first day of the first lunar month5. ( ) The new king didn't _____ Qu Y uan‟s advice, so he lost the battle.A. listened toB. listen toC. hearD. heard6. ( ) I know only _____ about the Dragon Boat Festival, not much.A. a littleB. littleC. a fewD. few7. ( ) It‟s not polite(礼貌) to leave _____ saying goodbye.A. toB. forC. withD. without8. ( ) Let me tell you something ____ the great man.A. ofB. aboutC. fromD. in9. ( ) Students do not wear winter uniforms ______ early December.A. atB. untilC. onD. after10. ( ) I want to see a film. How about ______?A. yourB. yoursC. youD. its11. ( ) These letters are for _______.A. you and IB. I and youC. you and meD. me and you12. ( ) Nowadays there are more and more _____________.A. woman driversB. women driversC. women‟s driverD. woman‟s drivers13. My daughter would like to eat some pudding. (对划线部分提问)_______ _______ your daughter like to eat?14. Let‟s go shopping tomorrow afternoon. (保持句意不变)_____ _____ going shopping tomorrow afternoon?15. People eat rice dumplings and have dragon boat races to remember Qu Yuan.(划线部分提问)_______ do people ______ to remember Qu Yuan?阅读能力提升基础篇A.Choose the best answer:4%Shopping Mania is near the square, opposite the post office. You can come by bus(no.15)or by train. Or you can park your car in our huge parking area(区域).You can find all kinds of things to buy. There are hundreds of shops. There are florit‟s (花店),music shops, clothes shops and even restaurants. Of course, there is the largest toy shop in the country.You don‟t have to be rich to buy th e things you want. At shopping Mania you can save money and buy more. You can buy your favourite CDs from €3 and great leather(皮质的) jackets from €10! Everything is affordable. Every Monday, designer jeans(品牌牛仔裤) are cheaper!Is shopping boring(无聊的)or diffi cult? Are you a mother with small children and shopping isn‟t easy? No problem! Why don‟t you bring them to our special playroom? They can play and you can have a great time shopping or having a coffee in one of our four cafes!64.( ) You can go to Shopping Mania_______.A. by bus, train or carB. by undergroundC. only by carD. by ship65. ( )There you can see_____ in the country.A. the largest parking areaB. largest toy shopC. the most special playroomD. the cheapest CDs66. ( )The underlined word …affordable‟ means_______.A. 便宜的B. 物美价廉的C. 买得起的D.昂贵的67. ( )If you‟re a mother with small children, shopping may be ____ for you.A. easyB. difficultC. interestingD. excitingB.Choose the words or expressions and complete the passage:4%Tiffany’s CookiesTiffany started baking cookies when she was in the fifth grade. When she __68___ a seventh-grader, her cookies were already locally famous. All of her friends begged(恳求)her to make her famous chocolate chip cookies __69___ every week. Then one day a local reporter wrote a story about her and her famous cookies. Later National Television News picked up the story. The story talked about the number of different recipes(食谱)Tiffany could make and how ___70___ her cookies were. When seeing the story, Coco Cookie Company called Tiffany to see if she would sell them her famous cookies recipe. Tiffany sold them her oatmeal raisin recipe for 20,000 dollars and hre pudding cookies for 50,000 dollar, but she said ‟__71___‟ to their idea of buying her chocolate chip recipe. She was going to keep this recipe and start her own company. In August 2002, she started Tiffany Boom Cookies Inc.68.( ) A. became B. met C. talked to69. ( )A. only B. almost C. about70. ( )A. cheap B. lovely C. tasty71. ( )A. yes B. no C. greatC.Read the passage and fill in the blanks with proper words:5%We buy vegetables in the supermarket, but students at Dalton Middle School in Georgia, USA, may no longer need a supermarket.Seventh grade s___72___ teacher Sarah Ott has a vegetable garden. Her spring students planted vegetable seeds(种子). Her fall students will now enjoy the vegetables.The students picked, watered, w__73_ the vegetables grow. The school garden is a good chance(机会) for them to know how to grow plants.Seventh-grader Habibah Bikhit said she loved to w__74__ in the school garden. “It‟s because we just get to pic and look at all the beautiful vegetables and the flowers,” she said.A c___75___ of language learners joined(加入) them too. Ott said it is a good way for them to learn English words because they can connect(联系) the words with r___76___ things.“You may be surprised how much the kids can learn from it,” Ott said.72. s_______ 73. w_______ 74. w________ 75. c_______ 76. r______D. Answer the questions:8%Lily has a penfriend in America. Her name is Alice. They write to each other every week. They tell each other about their lives. In her last letter Alice told Lily about her best friend. This is Lily‟s reply.Dear Alice,Thank you for your letter. I enjoyed reading it very much. Thank you for telling me about your best friend. In this letter I will tell you about mine. Her name is Teresa.Teresa has long, dark brown hair and green eyes. She is the same age as me, but a little taller. She is always happy and cheerful(兴高采烈的).We sit together in class and help each other with our school work. We always go home together after school and play computer games for an hour. Teresa thinks very quickly and usually wins.Teresa is learning to play the piano. I am learning to play the flute(长笛). We practice together every day We play simple duets(二重奏)for piano and flute. They are fun.Sometimes Teresa stays overnight at my flat, or I stay overnight at her house. We always have a lovely time. Do you ever(任何时候)stay overnight at your best friend‟s house?Write soonLove Lily 77. Who is Alice?_________________________________________78. Did Alice tell Lily about her best friend in her last letter?_________________________________________e one sentence to tell what the fourth paragraph (段落)is about?_________________________________________80.What does the underlined word ‟They‟ refer t o(指代)?_________________________________________81.List(列举)three of the things Lily and Teresa do to show they‟re friends. _________________________________________。

虹口补习班五角场新王牌新高一衔接班暑假招生(初三升高一)

虹口补习班五角场新王牌新高一衔接班暑假招生(初三升高一)

第4讲 气体 内能【课堂练习】9、如图是氧气分子在不同温度(0℃和100℃)下的速率分布,N N是分子数所占的比例。

由图线信息可得到的正确结论是 ( ) A .同一温度下,速率大的氧气分子数所占的比例大B .温度升高使得每一个氧气分子的速率都增大C .温度越高,一定速率范围内的氧气分子所占的比例越小D .温度升高使得速率较小的氧气分子所占的比例变小10、大量偶然事件的整体表现所显示的规律性,叫做统计规律。

如图所示的容器中,上部规则地布有许多铁钉,下部用隔板分割成许多等宽的狭槽,大量的小球可通过其上方漏斗形入口落下,装之前有玻璃板覆盖,使小球最终落在槽内。

(1)将一个小球扔下,重复多次实验,其落入哪个狭槽是____________的。

(选填“必然”或“偶然”)(2)让大量小球从上方漏斗形入口落下,以阴影表示最终落在槽内左右小球的分布形状,应是 ( )11、关于气体分子的速率,下列说法正确的是 ( )A .气体温度升高时,每个气体分子的运动速率一定都增大B .气体温度降低时,每个气体分子的运动速率一定都减小C .气体温度升高时,气体分子运动的平均速率必定增大D .气体温度降低时,气体分子运动的平均速率可能增大12、某日中午的温度比清晨的温度高6℃,用热力学温度来表示这一温度变化, 中午的温度比清晨升高了 () A .6KB .279KC .267KD .12KA B C D13、下列关于气体压强的说法中,正确的是()A.气体对器壁的压强是由于大量分子对器壁频繁地碰撞产生的B.气体对器壁的压强是由于气体的重力产生的C.温度越高的气体对器壁产生的压强一定越大D.密度越大,气体对器壁产生的压强一定越小14、为了探究气体压强的产生及影响气体压强的因素,某同学用电子秤和小玻璃珠做模拟实验,如图所示.下列关于他的操作和相关结论正确的是()A.为了防止玻璃珠弹出秤盘而产生误差,可在秤盘上放一块海绵垫B.实验中尽可能保证每一粒玻璃珠与秤盘碰前的速度相同C.将尽可能多的玻璃珠源源不断地倒在秤盘上,秤的示数会相对稳定在某一个值,说明气体压强是由大量的气体分子与器壁碰撞产生的D.将相同数量的珠子从更高的位置倒在秤盘上,秤的示数变大,说明气体的压强与分子碰撞器壁的体积有关15、下列说法中,正确的是()A.温度升高,每个分子的速率一定增大B.温度升高,一个分子在不同时刻的速率的平均值一定增大C.温度升高,大量分子的速率平均值一定增大D.温度升高,某个分子运动的速率一定增大。

虹口初中补习班五角场新王牌精品小班

虹口初中补习班五角场新王牌精品小班

九年级:动点相似问题(教案)题型一:动点产生的相似由动点产生的相似三角形的解题方法(分类讨论)和策略(具体步骤):1.直接法——直接利用相似列比例式解决问题(当需要的边长可以表示出或者计算出时) 具体步骤:①找出动三角形和定三角形中一组对应相等的角(利用恒等证明或恒不等证明)。

②分类讨论,剩余两组角会有两种对应相等的情况,每一种对应相等的情况写出相似(两个三角形对应字母对齐,且注意定三角形的字母按照原题中的顺序书写),③利用相似,列出比例式,将需要的边用字母表示出或者计算出从而解决问题。

注意:有些时候剩余两组角对应方式是固定的,只有一种情况(通过恒不等证明某一对角恒不相等即可,该步骤不能省略)。

【例题精讲】例1.如图a ,在Rt △ABC 中,∠ACB=90°,CE 是斜边AB 上的中线,AB=10,tanA=34,点P 是CE 延长线上的一动点,过点P 作PQ ⊥CB ,交CB 延长线于点Q ,设EP=x ,BQ=y. ⑴求y 关于x 的函数关系式及定义域;(4分)⑵联结PB ,当PB 平分∠CPQ 时,求PE 的长;(4分)⑶过点B 作BF ⊥AB 交PQ 于F ,当△BEF 和△QBF 相似时,求x 的值.(6分)(2012徐汇一模25题)解:(1)在R t △ABC 中,︒=∠90ACB ,∵34tan ==AC BC A ,10=AB ∴8=BC ,6=AC ……………………………………………………(1分) ∵CE 是斜边AB 上的中线,∴521===AB BE CE ∴ABC PCB ∠=∠,∵︒=∠=∠90ACB PQC备用图2备用图1图aBB Q AC∴PQC ∆∽ABC ∆,∴54==AB BC PC CQ ,即5458=++x y ……(1分) ∴454-=x y ,定义域为x >5.…………………………………………(2分) (2)过点B 作PC BM ⊥,垂足为M .∵PB 平分CPQ ∠,PQ BQ ⊥,垂足为Q .∴y BQ BM ==…………………………………………………………(1分) ∵52485353=⨯==BC BM ……………………………………………(1分) ∴524454=-x …………………………………………………………(1分) ∴11=x ……………………………………………………………………(1分)(3)∵︒=∠=∠90ACB Q ,A QBF ∠=∠∴BQF ∆∽ABC ∆…………………………………………………………(1分) 当BEF ∆和QBF ∆相似时,可得BEF ∆和ABC ∆也相似.……………………………………………(1分) 分两种情况:︒1当A FEB ∠=∠时,在R t △FBE 中,︒=∠90FBE ,5=BE ,y BF 35=∴534)454(35⨯=-x ,解得10=x ;………………………………(2分) ︒2当ABC FEB ∠=∠时,在R t △FBE 中,︒=∠90FBE ,5=BE ,y BF 35= ∴543)454(35⨯=-x ,解得16125=x ;…………………………………(2分) 综合︒1、︒2,16125=x 或10。

杨浦虹口补习班五角场恒高一对一春季词汇复习经典版

杨浦虹口补习班五角场恒高一对一春季词汇复习经典版

高一上词汇复习精简版(Unit 1-2)Unit 1 (新世纪)1. introduction n. 介绍2. professional n. 专业人员4. gain v. 获得5. impact n. 影响;作用8. patient n. 病人11. traditionally adv. 传统上14. style n. 风格;款式15. trend n. 趋势;时尚18. tiring adj. 令人疲劳的19. demanding adj. 要求高的;费力的20. rewarding adj. 值得做的,有意义的21. meaningful adj. 有意义的22. challenging adj. 具有挑战性的24. graduate n. 毕业生;毕业26. career n. 事业,职业27. disagree v. 不同意29. management n. 管理31. grateful adj. 感激的32. compose v. 创作;写作短语1. all walks of life 各行各业2. try one’s best 尽最大努力3. be involved in 参与;忙于4. all through one’s life 一生5. check in 签到6. even though 虽然,尽管7. take an interest in 对..产生兴趣8. make a decision 做决定Unit1 (牛津)2. glance v. 匆匆一看3. sigh v. 叹息4. senior adj. 级别高的7. communicate v. 交流11. impression n. 印象13. assistance n. 帮助14. without hesitation 毫不犹豫15. remark v. 说;评论16. remind v. 提醒18. signal v.表示19. hostility n. 敌意21. confusion n. 困惑22. maintain v. 保持23. consider v. 认为24. lack of 缺少25. last v. 持续26. avoid v. 避免27. respect n. 尊敬28. authority n. 权力30. concentration n. 专心31. subtle adj. 微妙的32. stare v. 盯着;凝视33. rude adj.粗鲁的高一下词汇预览版Unit 1(新世纪)1.determine v. 影响;决定2.rail n. 铁路3.efficient adj. (指人)有能力的;能胜任的4.journey n. (尤指)长途旅行,旅程5.seaport n. 海港;海港市镇6.inland adj. 内地的,内陆的7.waterway n. 水路,航道8.historical adj. 历史的;与历史有关的9.site n. 场所;遗址10.limited adj. 有限的,不多的11.regional adj. 地区的,区域的12.safety n. 安全;平安13.decade n. 十年14.destination n. 目的地15.highway n. 公路,大路16.state n. 国家;政府v. 说明;陈述17.inexpensive adj. 不贵的;廉价的18.depart v. 离开,出发19.cycle v. 骑自行车(或三轮车、摩托车)20.steep adj. 陡峭的;险峻的21.native n. 本地人,本国人adj.出生地的;本国的,本地的22.generally speaking 一般而言23.depend on 依靠;依赖24.on schedule 按时25.agency n. 代理处26.option n. 选择27.sort v. 将...分类;整理28.sort out 解决;从一批中挑出29.province n. 省30.exhibit n. 展览品,陈列品31.shopping mall (有屋顶的)大型购物商场32.one-way ticket 单程票33.round trip 往返旅行34.tour guide 导游35.brochure n. 手册;小册子36.duration n. 期间;持续时间37.approx. adv. (approximately)大约,大概38.spectacular adj. 壮观的;富丽堂皇的39.outing n. 短途旅行;远足40.marine adj. 海的;海产的41.habitat n. 栖息地;产地42.darling adj. & n. 惹人爱的,心爱的43.permanent adj. 永久的44.shark n. 鲨鱼45.aquarium n. 水族馆46.mysterious adj. 神秘的;难解释的47.surround v. 围绕48.entertaining adj. 使人愉快的;有趣的49.jewelry n. 珠宝;首饰50.feature n. 特点;特征v. 以...为主要内容;特写51.workshop n. 车间52.arrange v. 安排53.coach n. 长途汽车54.within arm’s reach 伸手可及的语法填空专题2016年上海崇明区高考英语二模(A)Happiness Is an AttitudeThe 92-year-old confident and proud lady, who is fully dressed each morning by eight o’clock, with her hair fashionably combed and makeup perfectly applied, (25)________ ________ she’s legally blind, moved to a nursing home today.Her husband of 70 years recently passed away, (26)__________ (make) the move necessary.After many hours of waiting patiently in the hall of the nursing home, she (27)_________ (smile) sweetly when told her room was ready. As she got into the elevator (28)__________ her wheelchair, I provided a description of her tiny room.“I love it,” she started with the enthusiasm of (29)__________eight-year-old child having just been presented with a new dog.“Mrs. Jones, you haven’t seen the room…just wait.”“That has (30)_________ to do with it,” she replied. “Happiness is something you decide on ahead of time.(31)_________ I like my room or no t doesn’t depend on how the furniture is arranged…it’s how I arrange my mind. I already decided to love it. It’s a decision I make every morning when I wake up. I have a choice; I can spend the day in bed recounting the difficulty I have with the parts of my body (32)________ no longer work or get out of bed and be thankful for the ones working. Each day is a gift, and (33)______ _____ _____ my eyes open, I’ll focus on the new day and all the happy memories I’ve stored away…just for this time in my life.”(B)Sculptor Builds Dubai’s Soaring Burj Khalifa Skyscraper out of Toothpicks to Bag World RecordA sculptor has scaled new heights by building the world’s tallest toothpick (牙签) model.Stanley Hayes Munro, 45, from Syracuse, New York, is a toothpick engineer, who (34)________ (hook) by toothpick models since he built his first sculpture in school when creating a structure that (35)_________ support the weight of an egg.Now, he has won the world record for the tallest toothpick structure with a sculpture of the Burj Kahlifa, Dubai. For Stanley though, he has always been more concerned with the integrity(完整性) of his work. Stanley said: “I’ve never cared for counting toothpicks, wasting to othpicks, or the number of toothpicks (36)________ (use) in any construction. But an engineering problem you’ve got to create a strong structure is a problem worth (37)__________(solve).” “I made my first toothpick structure in an art class when I was in Grade 5,” he continued. “The assignment was to build something 25 centimeters tall and to have it (38)_________ (hold) the weight of an egg. Mine held my desk and from that point I became interested in it.”“Everybody likes to ask whether my sculptures will collapse when I build them, but they are much (39)__________ (strong) than people think,” he said. “It was not really the height but the shape of the outer walls (40)____________was the biggest challenge with Burj Khalifa. There wasn’t a flat surface anyw here and I had to individually construct each level,” he said.2016年上海奉贤区高考二模`(A)Your next Disney obsession has arrived! Zootopia(疯狂动物城)hit theaters on March 4, and it’s fun at the movies for the entire family. If you’re in the mood to smile, Zootopia is the movie for you. The new Disney movie 25___________ (release) on March 4, starring Jason Bateman, Ginnifer Goodwin, Idris Elba and more. Critics are obsessed 26_________ Zootopia——Check out 27___________ the critics are saying about Zootopia now!---Zootopia is the best Disney animated film that I have seen in a long time. This is a movie that works for everyone. 28__________ doesn't matter whether you're 4 years old or 40 years old.---I love the characters. They do such a great job of building up Judy Hopps(兔子朱迪)from the moment she comes on screen and I think I will remember her as one of my favorite Disney characters.---Zootopia is smart, funny, and is mature in its storytelling and in its message. It’s very nice to see a movie dir ected at kids that has respect and treats kids as people who 29__________ understand complex themes, not mindless creatures that need simple cliched(刻板的)messages.---I predict that Zootopia will be one of the 30__________ (well-known) animated films of the following years. The film does what every animated film should do; it tells a solid story with a lot of emotional depth, and a message that can hopefully teach kids important lessons. The film is also funny, smart, beautifully animated, 31_________ (fill) with great characters, and features great voice work. If you have kids, and they 32________ (not see) this film yet, it’s safe to say they’d enjoy it, b ut they may possibly take an important life lesson away from seeing it too.(B)Leonardo DiCaprio(莱昂纳多·迪卡普里奥)was born in Hollywood. His parents met while 33_________ (attend) college and then moved to Los Angeles. He was named Leonardo because his pregnant mother was looking at a Leonardo da Vinci painting in a museum 34__________ DiCaprio first kicked.He dropped out of high school following his third year, eventually 35_________ (earn) his general equivalency diploma (GED).DiCaprio made his big screen breakthrough in 1992, 36_________ he was chosen by Robert De Niro out of 400 young actors to play the lead role in This Boy's Life.In 1997, DiCaprio starred in James Cameron's Titanic (1997) as twenty-year-old Jack Dawson(泰坦尼克号男主人公). The film became the highest-grossing film to date, and his face appeared on the covers of at least fourteen magazines.DiCaprio was also a dedicated environmentalist. In November 2010, DiCaprio donated $1 million to the Wildlife Conservation Society at Russia's tiger summit. DiCaprio's persistence in reaching the event after encountering two plane delays caused Prime Minister Vladimir Putin 37_________ (describe) him as a "real man".At the 2016 Oscar ceremony, DiCaprio’s 38_________ (win) the award for Best Actor impressed all the audience present. He expressed his appreciation and worry for the environment when he said: Climate change is real, and it is happening right now. It is the most urgent threat 39___________ (face) our entire species, and we need to work collectively together and stop procrastinating(拖延). We need to support leaders around the world who do not speak for the big polluters, but who speak for all of humanity, for the indigenous people of the world, for the billions and billions of underprivileged people out there who would be most affected by this, for our children’s children, and for those people out there 40_________ voices have been drowned out by the politics of greed.(A)“Time,” says the proverb, “is money”. This means that every moment well-spent may put some money into our pockets.If our time (25) __________ (employ) usefully, it will either turn out some useful and important piece of work which will fetch its price in the market, or it will add to our experience and increase our capacities so as to enable us to earn money when the proper opportunity comes. Let those, (26) ___________ think nothing of wasting time, remember this.Our life is nothing more than our time. To kill time is therefore a form of suicide. We are shocked (27) _________ we think of death, and we spare no pains, no trouble, and no expense to preserve life.But we often care nothing about the loss of an hour or of a day, (28) _________ (forget) that our life is the sum total of the days and of the hours we live. Our life is a brief period measuring some seventy or eighty years in all. So a day or an hour (29) __________ (waste) is therefore so much life lost.But nearly one third of this has to be spent in sleep; some years have to be spent over our meals; some in watching over the sick-beds of our (30) __________ (near) relatives; some in making journeys on land and voyages by sea.Now if all these years were to be decreased from the term over which our life extends, we shall find about twenty or thirty years at our disposal (处置) for active work. (31) __________ remembers this can never willingly waste a single moment of his life.The precious hours of childhood and youth, if properly used, (32) _________ (supply) us with incalculable advantages. If we allow these morning hours of life to slip away, we shall never be able to make up for the loss.(B)Home on the WayPeople need homes: children assume their parents’ place as home; boarders call school“home”on weekdays; married couples work together (33) __________ (build) new homes; and travelers...have no place to call“home”, at least for a few nights.So how (34) _________ people who have to travel for extended periods of time? Don’t they have the right to have a home? Of course they do.Some regular travelers take their own belongings: like bed sheets, toothbrushes and family photos to make them feel like home (35) ______ ______ ______ they are; some stay for long periods in the same hotel and as a result become very familiar with service and attendants; others (36) __________ simply put some flowers by the hotel window to make things more homely. Furthermore, driving a camping car during one’s travels and sleeping in the vehicle at night is just like (37) __________ is generally thought of as “home” -- only mobile!And how about maintaining relationships while in transit? Some keep contact with their friends via internet; some send letters and postcards, or even photos; (38) __________ may just call and say hi, just to let their friends know that they’re still alive and well. People find ways to keep in touch. (39) __________ (make) friends on the way helps travelers feel more or less at home. Backpackers in youth hostels may become very good friends, even closer than siblings.Nowadays, fewer people are working in their local towns, so how do they develop a sense of belonging? Whenever we step out of our local boundaries, there is always another “home” waiting to be found. Wherever we are, with just a little bit of effort and imagination, we can make (40) _________ place where we stay “home”.(A)GarlicGarlic, a common seasoning found in many different types of food, has a long medical and mythical history. References to garlic (25)___________(find) in Chinese texts that are dated as far back as 3000 BC. The physician Hippocrates used garlic in ancient Greece (26)_________(treat) infections and physical disorders. In many parts of ancient world, garlic was thought to avoid unfriendly spirits, treat wounds (27)_______ ________ _______ protect against disease.Roman soldiers believed that garlic brought them courage and energy. They took it with them when they went into battle. Egyptians fed garlic to their servants when they built pyramids. They thought that it gave the workers strength. They also believed that garlic had magical and medicinal powers. In the Middle Ages, people thought that garlic prevented the plague(瘟疫).People have praised the virtues of garlic for centuries. Garlic’s popularity began to decline in the early years of the twentieth century, but its reputation (28)_________(restore) in recent years. It is now a valuable cash crop in the state of California. Nearly a half-billion pounds of garlic are produced there each year. The city of Gilroy, California, considers (29)_________ the garlic capital of the world. Each year, the city hosts the Gilroy Garlic Festival in honor of the crop.Some doctors are studying garlic’s effects as a defense (30)_________ some forms of cancer. Others are exploring its possibilities for treating arthritis. Garlic has also received praise for its ability to lower high levels of cholesterol(胆固醇).(31)_________ some of the medicinal benefits of garlic have yet to be proven, it is certain(32)_________ many people enjoy the flavour that it adds to food.(B)The illegal sale and use of drugsDespite the respect of most Americans for law and the determination of the legal system to protect the rights of individuals, the United States, like all other countries, does experience crime. Especially in large cities, the crime rate (33)_______ be high.A high percentage of crime in the United States is directly related to the illegal sale and use of drugs. Drugs are smuggled into the country by (34)________(organize) groups despite intense efforts by the government to stop the illegal drug trade. Drug abuse in the U.S. has come to be regarded as one of (35)________(challenging) social problems facing the nation. The drug issue always excites strong emotions of American (36)_________ drug abuse is regarded as a major threat to American society, particularly to its younger members. Drug abuse is a social problem as it has (37)_________ wide range of social costs. For example, drug is closely related with crime, automobile accidents. Those (38)__________ become addicted to drug use sometimes rob or break into houses or stores to steal money to pay for the drugs. It has serious effects on individuals physically and mentally, (39)_________ the economic losses caused by drug abuse are great.Drug use has caused great concern in the United States. The federal government has worked hard to stop the (40)___________(grow) of drug plants in other countries. It has also set up special agencies, sometimes working with agencies from other nations, to catch the smugglers outside and inside the United States. Teachers and many citizens work together to teach children about the dangers of drug use. Many government agencies in the states and private citizen groups work to help drug addicts give up their drug use and turn to useful lives.听力专题之长对话(17二模:普陀;松江)Questions 17 through 20 are based on the following conversation.17. A. His view on Canadian universities.B. His understanding of higher education.C. His suggestions for improvements in higher education.D. His complaint about inequality in American universities.18. A. It is well designed.B. It is rather inflexible.C. It varies among universities.D. It has undergone great changes.19. A. The United States and Canada can learn from each other.B. Public universities are often superior to private universities.C. Everyone should be given equal access to higher education.D. Private schools work more efficiently than public institutions.20. A. University systems vary from country to country.B. Efficiency is essential to university management.C. It is hard to say which is better, a public university or a private one.D. Many private universities in the US are actually large organizations.松江Questions 17 through 20 are based on the following conversation.17. A. Beautiful scenery in the countryside. B. Cross-country skiing.C. Dangers of winter sports.D. Pain and pleasure in sports.18. A. He can’t find good examples to illustrate his point.B. He can’t find a peaceful place to do the assignment.C. He can’t decide whether to include the effort part of skiing.D. He doesn’t know how to describe the beautiful country scenery.19. A. New ideas come up as you write.B. Much time is spent on collecting data.C. It’s hard to find a proper topic.D. The writer’s point of view often changes.20. A. How to revise a paper in an academic manner.B. How to polish your arguments in a paper.C. How to tell the main ideas in a paper effectively.D. How to decide on relevant content for a paper.Questions 17 to 20 are based on the following conversation.W: Hello,I’m here with Tom. Now Tom, you went to university in Canada?M:Yeah, that's right.W:OK, and you have very strong views about universities in Canada. Could you please explain?M:Well, we don't have private universities in Canada. They're all public. All the universities are owned by n the government, so there is the Ministry of Education in charge of creating the curriculum for the universities and so there is not much room f or flexibility. Since it’s a government operated institution, things don’t move very efficiently.W:Oh, it's really beyond my expectation.M:Yes, however, there are certain advantages of public universities, such as the fees being free. You don’t have to pay for your education. But the system isn't efficient, and it does not work that well.W:Yeah, I can see your point. But in the United States we have many private universities, and I think there are a lot of rules also. Maybe people don't act that much differently, because it's the same thing working for a private university. They get paid for their job. I don't know if they're that much more motivated to help people. Also, we have a problem in the United States that usually only wealthy kids go to the best schools, and it's kind of a problem actually.M:I agree with you. I think it's a problem because you’re not giving equal access to education to everybody. It's not easy, but having only public universities also might not be the best solution. Perhaps we can learn from Japan where they have a system of private and public universities. Now,in Japan, public universities are considered to be the best.W:Right. It's the exact opposite in the United States.M: So, as you see,it’s very hard to say which one is better.W:Right, a good point. .Questions17. What does the woman want Tom to talk about?18. What does the man say about the curriculum in Canadian universities?19. On what point do the speakers agree?20. What conclusion does the man draw at the end of the conversation?Questions 17through 20 are based on the following conversation.M: Hello, Professor Jones.W: Hello, Tony. So what shall we work on today?M: Well, the problem is that this writing assignment isn’t coming out right. What I thought I was writing on was to talk about what a particular sport means to me—one I take part in.W: What sport did you choose?M: I decided to write about cross-country skiing.W: What are you going to say about skiing?M: That’s the problem. I thought I would write about how peaceful it is to be out in the country.W: So why is that a problem?M: As I start describing how quiet it is to be out in the woods, I keep mentioning how much effort it takes to keep going. Cross-country skiing isn’t as easy as some people think. It takes a lot of energy. But that’s not part of my paper, so I guess I should leave it out. But now I don’t know how to explain that feeling of peacefulness without explaining how hard you have to work for it. It all fits together. It’s not like just sitting down somewhere and watching the clouds rolling by. That’s different.W: Then you’ll have to include that in your point. The peacefulness of cross-country skiing is the kind you earn by effort. Why leave that out? Part of your point you knew beforehand, but part you discovered as you wrote. That’s common, right?M: Yeah, I guess so...(Listen again, please)Questions17. What is the topic of the man’s writing assignment?18. What problem does the man have while working on his paper?19. What does the woman say is common in writing papers?20. What is the conversation mainly about?秋季新王牌小班课赵N1 12月9日:高一(学生版)四大模块(词汇;语法专练;听力;写作)11 / 11写作题目:你是张华,你要竞选班长(class president),请写一篇竞选演讲词演讲词中应包括:1. 你为何认为自己可以胜任班长工作?2. 如果当选你将会为本班同学做什么?实战练习To begin with, one of my 1._____ is leadership, which plays a vital role 2._____ managing the whole class. Having had a 3._____ in leading a class, I am sure to lead the class to 4._____. Moreover, a sense of responsibility makes me 5._____ from other candidates. I’ll accomplish most class tasks 6._____with my responsibility. Last but not least, the ability to 7.______ will 8._______ class affairs. Along with such ability, I will be able to 9.______.2. 翻译填空:将括号内的中文翻译成英语,使得句子通顺(1)A._______(我坚信) that I will have the courage to B.______(处理大量工作) and turn our class into a wonderful, friendly and warm unit that is C._______(不亚于任何班级)A. I firmly hold the belief;B. deal with a great amount of work;C. second to none(2)If I am A.____(很幸运地赢得你们的支持) and get the post, I will do my best to B._____(尽好我的义务) and C._______(承担起作为领导者的角色) in our class.A. fortunate/lucky enough to win your support;B. fulfill my obligations;C. assume my role as a leader (3)I will make sure about A.______(自修时间的纪律和安静),providing the class with B.______(一个更好的学习气氛).A. the discipline and quietness of the self-study periods;B. a better studying atmosphere(4)Firstly, I will A.______(用尽任何方法) to build up the bridge between teachers and students in order toB._______(激发学习氛围).A. try every/all means;B. inspire the studying atmosphere3. 英译汉:用恰当的中文表达下列句子的意思(1)I’m sure that under my leadership, you will see a class running in a vigorous and harmonious way.(2)Since I hold several essential qualities equal to this position, I am quite confident that voting for me will be your wise choice.(3)In a word, I will do my best to fulfill the requirements of the position. Please trust me and lend me a hand so that I can serve everybody heart and soul.。

杨浦虹口初中高中补习班新王牌教会您学习初一语文05讲补充讲义-学生版

杨浦虹口初中高中补习班新王牌教会您学习初一语文05讲补充讲义-学生版

最后一次蹲守朱卫国①公墓,秋叶纷纷,老梁身穿保洁工作服,挨着一辆垃圾车,一边观察着不多的扫墓人,一边清理小径的落叶。

时间过去一年了,他又在这里等她。

②今天,是她儿子十周岁的生日,儿子长眠在此,那么孤单,她一定会来。

③老梁赌她一定会来,一年前,就在此地,他和她近在咫尺,尽管她巧装打扮、谨慎小心,他还是认出了她,他应该一跃而上,结束多日的蹲守,但他却让一个女逃犯从眼前平静地离开了。

④这是老梁单独执行的任务,尽管没有受到处分,但蹲守必须继续。

尤其是他再过几天就要正式退休了,他不想留下遗憾。

⑤一年了.她凌乱不堪的眼神让老梁无法平静,一个三十四岁的女人,却如一片枯黄干涩的落叶,凄惶憔悴,看得出痛失爱子的折磨已经深肌入骨。

老梁看見她眼中浑浊的泪水,像一根雨线倾注而下,身子剧烈抖动着,她跪在儿子的墓前,轻轻抚摸着孩子的相片,完全忘却了身边可能存在的危险。

此刻,她凝视着儿子定格的面容。

很久很久,渐渐地,她脸上露出了轻微的笑意,或许,她想到了:人间与天堂的距离不过是一块墓碑.⑥老梁没有冲上去,设计好的种种抓捕细节已经忘得无影无踪,他甚至不忍心靠近去打扰她,不知怎的,心底有一种力量拉着他继续隐藏.他看着她哭完后摆出了祭品,有巧先力,玩具,然后,她平静地离开了墓园。

⑦在很长一段时间里,老梁并不后悔放走了她。

⑧—阵秋风把老梁从思绪中拉回,.他紧了紧上衣,瑟瑟寒意让墓园更显寂寥,远远的暮霭中开始闪现零星的灯火。

⑨他再一次在脑海中回溯起她的经历,原本她有一个可爱的儿子,尽管被丈大抛弃了,母子俩还可以相依为命的,她发誓要好好带大儿子,她的确做到了,成了一位不折不扣的女强人,赚了很多钱,如果儿子没有突发那场疾病,一切都是美好的,医生那一句“我们已轻尽力了”带走了她所有的希望。

⑩绝望的她执拗地认为医生治死了她的儿子,她要报复,她私买了一些炸药,特意藏在郊外租来的屋子里,哪知骤起的高溫让炸药自爆,炸伤了从这里经过的路人,看到有关爆炸的新闻后,她开始逃匿,过着地下人的生活,无法见到阳光。

虹口初中最好的中考补习班五角场新王牌1306

金山区2015学年第一学期期末考试 高三物理试卷2016.1考生注意:1.本卷满分150分,考试时间为120分钟;2.答卷前,考生务必在答题纸上用黑色的钢笔或水笔填涂学校、班级、姓名、座位号。

3.第一、第二和第三大题的作答必须用2B 铅笔涂在答题纸上相应区域内与试卷题号对应的位置。

第四、第五和第六大题的作答必须用黑色的钢笔或水笔写在答题纸上与试卷题号对应的位置。

4.第30、31、32、33题要求写出必要的文字说明、方程式和重要的演算步骤。

只写出最后答案,而未写出主要演算过程的,不能得分。

有关物理量的数值计算问题,答案中必须明确写出数值和单位。

一、单项选择题(共16分,每小题2分。

每小题只有一个正确选项。

)1.如图,小球重为G ,上端用竖直轻绳挂于O 点,下端与水平面接触,则绳上的拉力不可能为() (A )0 (B )0.5G (C )G (D )1.5G2.下列属于理想化物理模型的是() (A )电阻 (B )元电荷 (C )力的合成 (D )自由落体运动3.电场中A 、B 两点间的电势差为U ,将电荷量为q 的点电荷从B 点移到A 点,在此过程中,电场力对该电荷做的功为() (A )qU(B )﹣qU(C )U q (D )q U4.如图,一定量的理想气体从状态a 沿直线变化到状态b ,在此过程中,其体积() (A )逐渐增大 (B )逐渐减小(C )始终不变 (D )先增大后减小5.如图,在“用多用表测电阻”的实验中,选用“×10”倍率的欧姆挡测量一电阻时,指针指在刻度20和30间的中央位置,该被测电阻的阻值R 所在区间为()(A )20Ω<R <25Ω (B )25Ω≤R <30Ω (C )200Ω<R <250Ω (D )250Ω≤R <300Ω 6.关于功和能,下列说法中正确的是() (A )功是能量的量度 (B )功是过程量,能是状态量 (C )功是矢量,能是标量 (D )功和能都是矢量7.如图,报警器由两个基本门电路与蜂鸣器组成,该报警器只有当输入电压过低时蜂鸣器才会发出警报。

虹口中考补习班五角场新王牌新高一衔接应该怎么学好(初三升高一)

电路【课堂练习】1、将一只阻值为几千欧的电阻R 1和一只阻值为千分之几欧的电阻R 2串联起来,则总电阻( )A .很接近R 1而略大于R 1B .很接近R 1而略小于R 1C .很接近R 2而略大于R 2D .很接近R 2而略小于R 22、将一只阻值为几千欧的电阻R 1和一只阻值为千分之几欧的电阻R 2并联起来,则总电阻( )A .很接近R 1而略大于R 1B .很接近R 1而略小于R 1C .很接近R 2而略大于R 2D .很接近R 2而略小于R 23、节日挂在树上或商店门口的小彩灯通电后发出丽的色彩,众多小彩灯是先和电阻 R 并联后再串联接到220 v 电源上的,其简化的电路如图所示。

下面对此电路正确的认识是( )A .当某小彩灯灯丝断时由于R 的导电作用仍保持整个电路通路,其他灯仍能发光B .R 的作用是分流,使小彩灯的电流不至太大C .R 的作用是分压,使得小彩灯不被烧坏D .为了节能,R 的阻值要小于小彩灯的灯丝电阻4、如图所示,R 1=8Ω、R 2=3Ω、R 3=6Ω通以电流,各个电阻电压之比U 1:U 2:U 3=___________,各电阻电流强度之比I 1:I 2:I 3=__________。

5、在比较精密的电子设备中,其电源跟负载之间的保护不是用普通的保险丝,而是广泛用保险电阻.当电流超过正常值时,这种保险电阻能够迅速熔断,它的阻值从0.1Ω到10Ω不等,关于它们的熔断时间跟阻值的关系,你认为正确的是( )A .阻值越大,熔断时间越长.B .阻值越小,熔断时间越短.C .阻值越大,熔断时间越短.D .阻值大小与熔断时间无关.6、通过电阻R 的电流强度为I 时,在时间t 内产生的热量为Q ,若电阻为2R ,电流强度为I/2时,则在时间t 内产生的热量为( )A .4QB .2QC . Q/2D . Q/47、下列求解电热的公式中,对所有电路均适用的是( )A .Q =UItB .Q =I 2Rt C .Q =R U 2t D .W =Pt 220v v L 1 L 2 L 3 RR R8、如图所示电路中,各灯额定电压和额定功率分别是:A 灯“10V ,10W",C 灯"60V ,60W”,D 灯"40V ,40W",B 灯"30V ,30W".在a 、b 两端加上电压后,四个灯都能发光.比较各灯消耗功率的大小,正确的是A .PB >P D >P A >PC B .P B >P A >PD >P CC .P B >PD >P C >P A D .P A >P C >P D >P B9、两只额定电压均为110V 的灯泡A 和B ,额定功率分别为100W 和40W ,为了使它们接到220V 电源上能正常发光,同时电路消耗的电功率最小,如图2-24所示电路中最合理的是图 ( )10、三盏灯泡L1(110V 、100W )、L2(110V 、60W )和L3(110V 、25W ),电源所能提供的电压为220V ,在图示的四个电路中,能通过调节变阻器R 使电路中各灯泡均能够正常发光且最省电的一种电路是( )(A )L(B ) (C ) (D )。

[上海虹口区初三补习数学多少钱?哪里的家教老师补课比较好] 虹口区高中补习

[上海虹口区初三补习数学多少钱?哪里的家教老师补课比较好] 虹口区高中补习一对一辅导网权威发布上海虹口区初三补习数学多少钱?哪里的家教老师补课比较好,更多上海虹口区初三补习数学多少钱?哪里的家教老师补课比较好相关信息请访问一对一辅导网。

上海初三补习数学多少钱?哪里的家教老师补课比较好?如何才能学好课程呢?根据我多年的教学体会,做好详细的总结,欢迎拨打免费咨询电话,专业老师为您讲解!上海口碑比较好的辅导机构咨询电话(即日起拨打400免费热线电话有免费试听课,400询电话使用方法:先拨前10位总机号,听到提示音后再拨后几位分机号即可咨询详情或预约对孩子学业进行免费测评):上海精锐教育-免费咨询电话:400-0066-911转分机12326【虹口区】虹口足球场中心、四川北路中心上海京翰教育-免费咨询电话:400-0066-911转分机77657【虹口区】虹口足球场校区上海学大教育-免费咨询电话:400-0066-911转分机10793【虹口区】虹口足球场校区、和平公园校区上海智康教育-免费咨询电话:400-0066-911转分机12253【虹口区】四川北路校区【招生范围】只招收小学、初中、高中各年级【热门课程】小初高各年级各学科同步辅导、数学,英语,物理,化学,作文,语文,历史,地理,生物。

小升初、衔接班、奥数班、冲刺、艺考辅导。

【上课时间】周六日、寒、平时晚上等时间灵活协商安排!以上的是各个学校的免费咨询电话,课程费用因年级不同、科目不同收费不同,家长如需给孩子提高学习成绩可直接拨打上面400免费电话咨询。

免费预约试听电话:400-0066-911转分机12326温馨提示:400免费咨询电话使用方法--先拨打前十位,听到语音提示“请输入分机号码”后按“转分机”后的几位分机号即可。

您可以咨询就近校区、价格、1师资等情况!浏览十个广告,不如一个400免费咨询电话了解快!********************************************上海初三补习数学多少钱?哪里的家教老师补课比较好?-后想谈谈数学这一科目的应试技巧。

虹口初中补习班五角场新王牌初中英语阅读秋季提高训练(4)

虹⼝初中补习班五⾓场新王牌初中英语阅读秋季提⾼训练(4)Test 4AComplete the following passage with the words or phrases in the box. Each word canonly be used once(将下列单词或词组填⼊空格。

每空格限填⼀词,每词只能填⼀次)A young man had a small business. He worked very hard, and he made a lot of money. One day, he had 1 with a businessman. He wanted the man to become his business partner. When they finished the dinner, there were two dumplings 2 .The young man told the waitress, "Please pack them in a doggy bag a nd I’d like to take them home." Soon the businessman decided to work 3 the young man. He said, "The young man is great. He has lots of money but he won't 4 it."Van is Jim's new friend at school. Van 5 a country far away. He doesn't talk like the other children in school. But he can do numbers and 6 . The teacher asked Jim to show V an around and help him.Van sat with Jim and his friends at lunch. Jim showed Van how to play kickbal1. Jim 7 something and said the word. Van tried to say the word.Van is learning many new words. He wants to learn how to read. Van is happy that Jim helps him and is his friend. Jim likes Van too because V an tries so 8BChoose the best answer(根据短⽂内容,选择最恰当的答案)Harry keeps a diary. He writes in it every day. Here is his diary for a week in May.Monday 15th. It rained all day so we did not have PE class. We stayed in our classrooms and read our library books. Tuesday 16th. I missed the bus and was late for school. It wasn't my fault(过错). The bus was early.Wednesday 17th. I had an English exam today. 1 got 96%. It's my highest grade ever. I made only one mistake. I used the wrong tense( 时态) in a sentence.Thursday 18th. I went swimming with Ben. We had lessons with a swimming instructor(教练). He taught us how to dive. Friday 19th. I was sick all day. I caught a cold at the swimming pool. I stayed in bed and slept all day. I felt better in the evening. I'm glad it was Friday and not Saturday or Sunday.Saturday 20th.I was much better today, but Mom made me stay at home. I watched television all day. It was boring. Sunday 21st. I didn't do anything interesting today.1. Why didn't Harry's class have PE class on Monday?A. Because they had to read their library books.B. Because they missed the bus.C. Because it rained all dayD. Because they had an English Exam. ·2. What happened on Tuesday?A. Harry was sick all day.B. Harry missed the bus and was late for school.C. Harry got to school early.D. Harry 's bus late and he was late for school.3. What was Harry's only mistake in the English exam?A. He spelled one word incorrectly.B. He used the wrong tense in a sentence.C. He used the wrong sentence.D. He used the wrong word in a sentence.4.What did Harry learn to do on Thursday?A. He learned to swim.B. He learned to dive.C. He learned to teach.D. He learned to sleep.5. On which day did Harry miss school?A. Tuesday.B. Wednesday.C. Monday.D. Friday.6. Why did Harry stay at home on Saturday?A. Because his mom made him.B. Because he wanted to watch television.C. Because he still felt sick.D. Because he wanted to sleep all day.CChoose the words or expressions and complete the passage(选择最恰当的单词或词语完成短⽂)Cindy found three baby birds on the grass in the yard. Near the babies, there was a bird's nest(巢) on the ground. She also noticed two birds 1 up and down in a tall tree nearby. "Youmust be the mommy and daddy," Cindy said. 'T1l get your babies back to you." So she called her aunt for 2After lunch, Aunt arrived and knew what had happened. "I'm sure the 3 blew the nest out of the tree." she said. "We'd better make a new nest." She found an empty plastic basket, washed and dried it. Then Cindy put the bird's nest in it and put the baby birds inside the nest. After these, they went outside with the nest and a ladder. Aunt 4 up the ladder and tied the new nest to the tree. "Let's watch the nest from the window in the house." Aunt said. They waited and waited and 5 the mommy and daddy birds jumped to the place where the nest hung. One of the birds put food into the babies' mouths. Cindy 6 when she watched the babies eat their lunch.1. A. falling B. breaking C. beating D. jumping2. A. answer B. question C. help D. idea3. A. rain B. wind C. cloud D. river4, A. flew B. ran C. climbed D. walked5. A. luckily B. finally C. suddenly D. happily6. A. smiled B. pointed C. called D. shoutedDRead the passage and粗1 in the blanks with suitable words(在短⽂的空格内填⼊适当的词,使其内容通顺。

  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

九年级:锐角三角比综合(学案)
学习目标:
1.掌握锐角三角比的意义;
2.掌握特殊角的三角比值;
3. 掌握锐角三角比的应用;
题型一:解直角三角形
【例题30】【2017年闵行一模13】
已知在Rt △ABC 中,90C ︒∠=,6BC =,2sin 3A =
,那么AB =
【例题31】【2017年普陀一模17】
如果等腰三角形的腰与底边的比是5:6,那么底角的余弦值等于;
【例题32】【2017年静安一模14】
在ABC ∆中,如果10==AC AB ,5
4cos =
B ,那么AB
C ∆的重心到底边的距离为________.
【例题33】【2017年嘉定一模10】
如图2,在平面直角坐标系y x O 内有一点Q ,5=OQ ,
射线OQ 与x 轴正半轴的夹角为α,如果4sin 5α=

那么点Q 的坐标为.
【例题34】【2017年杨浦一模21】
已知:如图,梯形ABCD 中,AD ∥BC ,ABD C ∠=∠,4AD =,9BC =,锐角
DBC ∠的正弦值为23
; (1)求对角线BD 的长;
(2)求梯形ABCD 的面积;
【例题35】【2017年青浦一模21】
已知:如图5,在平面直角坐标系xoy 中,反比例函数x
y 8=的图像与正比例函数)0(≠=k kx y 的图像相交于横坐标为2的点A ,平移直线OA ,使它经过点B (3,0),与y 轴交于点C 。

(1)求平移后直线的表达式;
(2)求OBC ∠的余切值.。

相关文档
最新文档