高考热身练习5 - 副本

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2020届全国高考考前大冲刺卷模拟卷（五）英语试题（含解析）

2020届全国高考考前大冲刺卷模拟卷（五）英语试题（含解析）2020届全国高考考前大冲刺卷模拟卷（五）英语试题注意事项：1.答题前，考生务必将自己的姓名、准考证号填写在答题卡上。

2.考试结束后，请将本试题卷和答题卡一并上交。

第Ⅰ卷第一部分听力本次训练无听力第二部分阅读理解（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，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

AYou can either travel or read, but either your body or soul must be on the way. The popular saying hasinspired many people to read or go sightseeing. Traveling just like reading, is a refreshing journey from the busy world. Books, brain food, can keep you company on your travel.On the Road, 1957, by Jack KerouacThe book is a globally popular spiritual guide book about youth. The main character in the book drives acrossthe US continent with several young people and finally reaches Mexico. After the exhausting and exciting trip, the characters in the book begin to realize the meaning of life. The book can be a good partner with you to explore the United States.Life is Elsewhere, 1975, by Milan KunderaJean-Jacques R ousseau once said, “Man is born free, and everywhere he is in chains.” The book te romantic but miserable life, about how he reads, dreams, and has a relationship. Experience the artist’sartist’spassionate life in the book during a trip to Central Europe. The book invites you to deeply reflect on your current life.The Stories of Sahara, 1967, by SanmaoThe book narrates the author’s simple but adventurous life in the Sahara Desert, which seems a desolate anddull place. The fancy natural scen ery and life there, along with the author’s romantic and intensive emotion, wil inspire you to explore the mysterious land. Reading the book is like participating in a dialogue with the author,who is sincere and humorous.Lotus, 2006 by AnnbabyThis nove l set in Ti bet, tells three people’s stories, each with their unique characteristics. It reveals modern people’s emotions and inner life, their confusion about love, and exploration of Buddhism. The book is a goodpartner to bring you to the sacred land Tibet.21. Which book is about the exploration of life value througha journey?A. On the Road.B. Life is Elsewhere.C. The Stories of Sahara.D. Lotus.22. Whose book could be the most suitable for your trip to Germany?A. Jack Kerouac’s.B. Sanmao’s.C. Annbaby’s.D. Milan Kundera’s.23. What can we learn from the text?A. Lotus is a religious book exploring Tibetan Buddhist culture.B. On the road advises a classic route for driving across the US.C. The stories of Sahara records its authors’ own life in the desert.BWhen I was a boy, our extended immigrant family would sometimes gather at my aunt’s tiny house summer. Relatives from all over the country would come in to visit. The adults would crowd together in the livingroom to talk and catch up on each other’s li ves. And the kids would be sent out into the front yard to play when dinner was slowly cooked for all of us.Those were the days before video games, smart phones, and motorized toys, so we often ended up playing anold game. I remember one of those moments especially. As I was the youngest and smallest of all the kids there, Igot caught first and couldn’t catch anyone else. My brothers and cousins were all too fast for me, and I grew more and more frustrated. I finally fell my face first into the dirt. I got up with tears forming in my eyes. Then I saw oneof my female cousins Susan standing there. She started to run but was going much slower than before. I easilycaught up and seized her. Then she turned to me, smiled, andsaid, I’m it! You’d better run! I ran off laughing with glee while she turned and started to chase others.Now I see how her act of kindness that day saved me from sadness and returned me to joy. It didnthat we hardly ever saw each other. I know we are family and she loves me.In her wonderful book Box of Butterflies, Roma Downey writes, “We are all one, we all belong to each other,Perhaps it is time that we all started to treat each other that way. Perhaps itand we are one big, beautiful family.”is time that we shared our love, our kindness, our laughter, and our joy with everyone without fear. Perhaps it istime to finally and forever bring this world together in one big family reunion.24. When the adults were chatting, the kids would __________.A. play video gamesB. sit in the front yardC. learn to cook dinnerD. play traditional games25. The author was able to catch Susan because ________.A. the others ran too fastB. the author was good at runningC. Susan gave her a chanceD. Susan wanted to chase others26. What can be inferred from the passage?A. The author is grateful for what Susan did to her.B. The author can’t meet Susan any more.C. The author urges others to love their family.D. The author believes the world will become a big family.27. What could be the best title of the passage?A. A memory of my childhood.B. Sharing of goodness unites us.C. Kindness brightens our life.D. A good deed is invaluable.CPlease take a few seconds and think of your personal biggest goal. Imagine telling someone you meet todaywhat yo u’re going to do. Imagine their congratulations and their high image of you. Doesn’t it fehould have kept your mouth shut, becauseout loud? Don’t you feel one step closer already? Well, bad news: you sthat good feeling will make you less likely to do it.Any time you have a goal, there is some work that needs to be done to achieve it. Ideally, you would not ben you tell someone your goal and he acknowledges(认可) it, satisfied until you’d actually done the work. But whepsychologists have found it’s called a “social reality”. The mind is kind of tricked into feeling that it’sthe actual hard work necessary.done. And then, because you’ve felt that satisfaction, you’re less motivated to doThis goes against the traditional wisdom that we should tell our friends our goals, right?In 1982, Peter Gollwitzer, a Professor of Psychology, wrote a whole book about this. And in 2009, he didsome new tests that were published. It goes like this: 163 people across four separate tests—everyone wrote downtheir personal goal. Then half of them announced their commitment(许诺) to this goal to the room, and half didn Then everyone was given 45 minutes of work that would directly lead them towards their goal, but they were told that they could stop at any time. Now those who kept their mouths shut worked the entire 45 minutes on average, and when asked afterwards, said they felt they had a long way to go to achieve their goal. But those who hadannounced it quit after only 33 minutes on average, and when asked afterwards, said that they felt much closer to achieving their goal.28. What do the words “social reality” in Paragraph 2 mean?A. Completion of the goal.B. Necessary hard work.C. People’s acknowledgement. D. A sense of satisfaction.29. What does Peter Gollwitzer try to tell us?A. Writing down the goal is very helpful.B. Achieving personal goal needs more time.C. Keeping the goal secret makes people work harder.D. Making the goal public makes people less satisfied.30. How did Peter Gollwitzer prove his idea about people’s goal?A. By giving figures.B. By giving examples.C. By making a survey.D. By making comparison tests.31. What will probably happen if you tell your friends your goal?A. You will be more confident.B. You will not gain satisfaction.C. You are less likely to realize it.D. You’ll be much more motivated.DCompared with solar and wind energy, which are booming, tidal(潮汐的) power is a loser in the clean-energy competition. But if you did want to build a tidal power station, there are few better sites than the mouth of theRiver Severn, in Britain. Its tidal range, the difference in depth between high and low tides, of around 15 metres isamong the largest in the world.Engineers and governments have been toying with the idea since at least 1925. But none of the suggestedprojects has materialised. Price is one objection. A study thought that tidal energy might cost between ￡216 and ￡368($306-521) per MWh of electricity by 2025, compared with ￡58-75 for seagoing wind turbines(轮机) and￡55-76 for solar panels. Environmentalists also worry that any plant would change the tides, making life harder for wildlife.An engineer called Rod Rainey thinks he has a way around both problems. He plans to replace the conventional turbines of previous plans with a much older technology. Specifically, he plans to span(横跨) theriver mouth with a line of water wheels. This is a design that dates back to the early days of the Industrial Revolution. Examples can be found fixed to the sides of old watermills(水磨).But there would be nothing old-fashioned about Mr Rainey’s wheels. Thirty metres high and sixty wide, they would be made from ordinary steel. Two hundred and fiftyof them, along with the supporting structures, would be floated into place and secured to the seabed, creating a line 15km long. Together, they could supply power at anaverage rate of 4GW. That is about as much as two biggish nuclear power stations would manage. Substitutingone of the wheels with a set of locks would provide a shipping channel about twice the width of Panama Canal, permitting upstream ports such as Avonmouth and Cardiff to continue operating.32. What is special about the mouth of the River Seven?A. The tidal range there is about 15 meters.B. It has the largest tidal range in the world.C. The tidal power station has been built there.D. Its power plant makes life harder for wildlife.s initial attitude towards tidal power?33. What was people’A. Opposed.B. Supportive.C. Controversial.D. Doubtful.34. What are the locks used for?A. Support.B. Transportation.C. Securing wheels.D. Producing electricity.35. What’s the best tittle for the text?A. Rainey invented turbines.B. Rainey’s tidal power station.C. Tidal power in the River Seven.D. An old idea might be made practical.第二节（共5小题；每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。

学校初中部体育暑假作业 - 副本

学校初中部体育暑假作业初中部同学经过这一学期的体育锻炼，体育成绩都有不同程度的提高。

但随着体育课的停上，假期的来临，如果同学们不坚持科学地锻炼，获得的成绩会很快消退，更谈不上提高了。

而一开学就是9月，所以假期有计划科学地锻炼身体就显得非常重要。

就此学校提供一份体育作业，希望大家在假期能坚持锻炼，争取体育成绩大有进步！一、目的增强体质，合理利用假期，为中考体育考试做准备，同时培养学生终身锻炼习惯。

二、总要求：1、安全、健康、易行，符合中考内容。

2、建议每天至少抽出30分钟专门用于体育锻炼，参照活动项目结合自身的情况，可适当调整。

3、开学后进行体育项目测试，测试内容：立定跳远、坐位体前屈、长跑（女生800米、男生1000米）引体向上（男）仰卧起坐（女）、跳绳4、注意运动安全。

三、流程1、热身3--5分钟，慢跑+徒手操（上体育课的准备活动）提示：练习地点一定要安全。

2、主要内容25分钟左右3、放松3--5分钟慢走、调整呼吸四、活动项目热身运动后完成1、柔韧练习：压肩运动4*8拍腹背4*8拍压腿（左、右、侧各4*8拍）体侧（前）屈（左、右、前各4*8拍）压脚30秒后踢腿左右各15次2、耐力练习：每天坚持1500---2000米的长跑练习或者匀速跑10分钟。

如果遇到下雪或者雾霾天，可用3--5分钟跳绳2次，或者10分钟跑楼梯来锻炼。

（在楼梯练习中，注意安全）3、下肢练习（每天任选一到两项）蛙跳10次为一组，练习5--8组；蹲跳起30---50次为一组，练习3--5组。

4、上肢练习俯卧撑20--30次为一组，练习3---4组5、腰腹力量练习仰卧起坐30--40次为一组，练习2---3组。

6、跳绳结合软件每天进行作业布置以及检查7、也可以选择球类项目：篮球、足球、羽毛球、乒乓球等8、放松1、拉大腿2、抖腿3、腹背五、具体要求：1、每天都有耐力和上下肢力量的练习以及一分钟仰卧起坐、一分钟跳绳，其他项目可自选。

2、注意运动安全和交通安全。

错题练习 - 副本

错题练习一、单选题（共20题；共40分）1.We'll _________ move to new apartments very soon!A. canB. couldC. be ableD. be able to2.In five years, Sally ______ a basketball player.A. wasB. isC. will beD. will3.How _______ milk and how _________ hamburgers do you need?A. much; muchB. much; manyC. many; manyD. many; much4.Please give me two ________.A. pieces of paperB. pieces of papersC. pieces paperD. piece papers5.There ________ a football game between Italy and Germany tomorrow morning.A. hadB. is going to beC. will haveD. has been6.There a football match on TV this evening.A. will haveB. is going to beC. hasD. is going to have7.My brother is going _________ to be a doctor.A. study medicineB. to study medicinesC. to study medicineD. studying medicine8.We are sure ________ the football match.A. winB. to winC. winningD. wins9.—How many birds can you see in the trees?—I can see __________ birds in them.A. hundreds ofB. five hundredsC. hundred ofD. five hundreds of10.I hope we'll study ________ home ________ computers in the future.A. in; withB. at; onC. at; withD. in; on11.— Would you like some milk?— Yes, just _______.A. a fewB. fewC. a littleD. little12.If it rains tomorrow, we ________ stay at home.A. is going toB. are going toC. willD. will be13.I don't like this pen. Please show me ________ one.A. otherB. the otherC. anotherD. the another14.— I think math is more useful than P. E.— I don't _________ you. They are both useful.A. get on withB. catch up withC. talk withD. agree with15.—How soon will he come back?—__________.A. After three daysB. In a weekC. On FridayD. Next month16.The farmer likes ______ vegetables in his garden, and they all ______ well.A. growing; grow upB. to grow; grow upC. growing; growD. to grow; grows17.Why did the child ________ crying last night?A. came onB. come onC. keep onD. kept on18.There is going ________ a science show this weekend.A. to beB. to haveC. to holdD. to see19.We should play a part in ________ the party.A. organizeB. organizingC. organizationD. organized20.This coat doesn't fit him well, as he has __________ a huge body and the coat is __________ small.A. so; suchB. so; soC. such; suchD. such; so二、填空题（共4题；共33分）用所给动词的适当的形式填空21. （1）—Is your home far from here? —Yes, it’s a little________ than yours. （2）—Do you know Zhao Wei?—Sure. She is the most popular ________ .（3）Last week’s talents show was a great ________（4）The movie ________ for three hours yesterday.（5）He lives in the ________ part of America.22.(1)You’d better ________(grow) some flowers behind the house.(2) Mike ________ (clean) the classroom now.(3) Isabelle always ________ (do) her homework in the evening.(4) I ________ (be) very busy yesterday.(5) Today ________ (be) Sunday.(6) Hi, Tara. Where ________ you ________ (go)?(7) The students________ (be) busy now. They ________ (have) an exam next week.(8)Pedro’s parents ________(not be) at home last night.(9) Loretta ________ (be) ill last week. She________ (be) much better now.(10)Let me ________ (carry) the box for you.three minutes.________ put in the ham cubes and lettuce and ________ them all up.24.①We are going to do more exercise________(keep) fit.②I am going to ________(be) a doctor when I grow up.③I’m going to practice________ (play) the guitar every day.④When did you learn ________(play) the violin?⑤—Shall we go to the movies tonight?—That________ (sound) interesting.三、语法填空（共20题；共21分）25.The old man keeps ________ (health) by eating well and exercising often.26.Mr. Green began to talk very ________ (serious) to his son.27.The Greens ________(visit) the museum next Monday.28.The result is very ________(surprise).29.We're making ________(prepare) for the physics exam.30.I want to know how ________(cook) meat.31.Could you cut the pear into two ________(half) ?32.How many ________(tomato) are there on the plate?33.Dale and Dave both like math and they dream of being________(science).34.Thanks for ________(tell) me the way to the post office.35.Put ________(they) on the sandwich, please.36.He's a ________（care) boy. He often leaves his school things at home.37.The newspaper comes out________(week). I buy it every week.38.________(one) peel some pears, then cut them up.39.There will be hundreds of________(factory) in the big city.40.The hotel was noisy. He ________(advise) us to change (换) it for another one.41.It's________(possible) for a little child to answer this difficult question.42.Don't throw (扔) dirty things into the river. They will________(pollute) the river.43.His name is James but he calls ________(he) Jim.44.We can do the work with________(little) money and ________(few) people than they can.四、选词填空（词汇运用）（共3题；共30分）（1）The dog ________ the box and I didn't find it.（2）She ________ her exam next week.（3）________, the boy told me about the thing.（4）Please cut the apple ________.（5）— Can you ________ it ________? — Certainly, I can.设计直升机world? Who knew more about the human body than most ________? There is an answer to all these questions——Leonardo da Vinci. You might ________what I said, but it is true.Leonardo was a great genius (天才). He didn't study at a(n)________. About 1,500 years ago, he lived in Italy. He had lots of ________. One of them was inventing (发明) things. One of his notebooks had drawings of a helicopter. Of course, he wasn't ________to build a helicopter with the things he had. But________said his idea worked.Leonardo wasn't just an inventor. He enjoyed painting. He was one of the greatest ________of his day. Whenhe was young, he was an excellent painter. As he ________he became more famous. Many of Leonardo's wonderful________are still with us today, for example, the smiling woman the Mona Lisa.We are going to have a party in our house this evening. It is my________birthday, and she has________my uncles and aunts and some of her________. Mother and I are________to cook most of the food for the party, and Father is getting the drinks ready. The living room looks very pretty. Balloons of all colors are hanging from the lights________we have taken the carpets away________we are going to dance there after dinner.In the dining room we have________out the best plates, glasses and tablecloths, and it looks________. We are going to have soup, fish, chicken, fruits and cheese. We are going to dance________midnight, and after that, we will have________food, because we will be hungry after all that dancing.Last year my mother________her birthday party in a restaurant,________it is more pleasant and________at home.When it is my birthday, I am going to invite my friends and have a party in the garden. I will hang colorful lights________the trees, and we will grill (烧烤)our food in the garden and dance________the grass.答案解析部分一、单选题1.【答案】D2.【答案】C3.【答案】B4.【答案】A5.【答案】B6.【答案】B7.【答案】C8.【答案】B9.【答案】A10.【答案】B11.【答案】C12.【答案】C13.【答案】C14.【答案】D15.【答案】B16.【答案】C17.【答案】C18.【答案】A19.【答案】B20.【答案】D二、填空题21.【答案】farther ；actor ；success ；lasted ；southern22.【答案】grow；is cleaning；does ；was；is；are；going ；are；are going to have ；were not；was；is ；carry23.【答案】learn；Let；First；pour；into；add；Next；for；Finally；mix24.【答案】to keep ；be；playing ；to play ；sounds三、语法填空25.【答案】healthy26.【答案】seriously27.【答案】will visit28.【答案】surprising29.【答案】preparations30.【答案】to cook31.【答案】halves32.【答案】tomatoes33.【答案】scientists34.【答案】telling35.【答案】them36.【答案】careless37.【答案】weekly38.【答案】First39.【答案】factories40.【答案】advised41.【答案】impossible42.【答案】pollute43.【答案】himself44.【答案】less；fewer四、选词填空（词汇运用）45.【答案】（1）ran away from（2）is worried about（3）In the end（4）in half（5）keep；to yourself46.【答案】painted；doctors；question；university；hobbies；able；scientists；artists；grew up；paintings47.【答案】mother's；invited；friends；asked；and；because；put；beautiful；until；more；had；but；cheaper；in；on答案解析部分一、书面表达1.【答案】Dear Tony,I'm very happy to receive your litter. Now let me tell you something about my life in ten years. I will be an artist when I grow up. I love the nature and I will draw all the beautiful things around us. I will live in Beijing in the future because the environment is better in this city. Also, my parents will live in an apartment with me. So we can enjoy all the great things together, I hope I will go somewhere else on vacation if I am free. I will show people what I see in the world with pictures.Yours,Li Hua 2.【答案】One possible versionOur lives will be different in 30 years. Scientific products will be used in daily life and they will bring us a lot of convenience. There will be a lot of robots to do the work, so people will have less work to do. And computers are much more important than they are now. We will use them to make important plans and other things. At thattime,we will use water and sunlight as the main energies. There won't be pollution any more., and then we can see the clear water, the blue sky all year round as many years ago.3.【答案】One possible version:Dear Liu MinI know your problem, i think you made two mistakes. First, you used your friend's pen without letting her know. Second, when you broke the pen, you didn't tell her about it.I think you should say sorry to her and tell her about the Whole thing. If you do, maybe she' l! be angry with you, but at least she' 11 know you' re kind and serious. Also. I think you should buy her a new pen. If you do, she'11 know that you're truly sorry.I hope my advice can help you.Yours,Linda。

【北师大版】五年级数学下册教案-【练习四】 - 副本

60dm3＝60L
答：这个油箱能装60升汽油。
师：(2)假如每升汽油可行驶10km，这箱油最多可以供Байду номын сангаас辆汽车行驶多少千米？
用乘法计算。
10×60＝600（千米）
答：这箱油最多可以供这辆汽车行驶600千米。
师：13.实践活动。找一些棱长为1cm的小正方体，做下面的活动。
师：(1)用4个这样的小正方体可以摆成一个大正方体吗？
公式：长方体的体积=长乘宽乘高
12×4×3
＝48×3
＝144（cm3）
答：这个长方体的体积是144立方厘米。
师：5.换算单位，先回想一下体积和容积单位之间的进率吧。
1m3＝1000dm3 1dm3＝1000cm3
1L＝1000mL
0.35m3＝（350）dm3 2.04dm3＝（2040）cm3
5300dm3＝（5.3）m3 2800cm3＝（2.8）dm3
四、课堂小结
四、课堂小结
师：通过这节课的学习活动，你有什么收获？
师：体积和容积
体积单位（一）
体积单位（二）
长方体的体积
体积单位的换算
好玩的测量
五、教学板书
练习四
六、教学反思
优点：这节课非常注重学生创新能力的培育，发挥生活中常见的现象给人的冲击作用，物体沉入水中水面会上升，让学生理解排水法的原理所在。空间观念在此时进一步深化，以另一种非常规的形态被学生所接受。
9×9×9
＝729（cm3）
第三个图形
长乘宽乘高
22×10×8
＝220×8
＝1760（cm3）
师：4.一个长方体的长是12cm,宽是长的1/3，高是长的1/4，这个长方体的体积是多少？

【步步高】高考语文-大二轮专题复习-热身训练半个月-第5天课件

(3)盘盘焉，_____囷__囷__焉_____，蜂房水涡，
矗不知乎几千万落。
(杜牧《阿房宫赋》)
(4)老夫聊发少年狂，左牵黄，____右__擎__苍______，
锦帽貂裘，__千__骑__卷__平__冈____。
(苏轼《江城子·密州出猎》)
三、现代文阅读阅读下面的文字，完成 4～6 题。
回望钱学森卞毓方
钱学森也有着十分粗狂而任性的另一面。他当年的学生们回忆，他上课总要迟到几分钟，正当大家猜测他今天是否会缺席时，他快速冲进教室，二话不说，抓起粉笔就在黑板上写开了，直到用细小而工整的字迹填满所有的黑板为止。又有一次，一个学生举手说：“第二面黑板上的第三个方程式，我看不懂。”钱学森不予理睬。另一个学生忍不住发问：“怎么，你不回答他的问题吗？”钱学森硬邦邦地说：“他只是在叙述一个事实，不是提出问题。”又有一次，一个学生问钱学森：“你刚才提供的方法是否万无一失？”钱学森冷冷地瞪了他一眼，说：“只有笨蛋才需要万无一失的方法。”期末考试，钱学森出的题目极难，全班差不多都吃了零蛋。学生有意见，对此钱学森回答：“我又不是教幼儿园！这是研究所！”
2．下列各项中，加点的成语使用正确的一项是( ) A．春秋末年，越王勾践以“卧薪尝胆”和“十年磨一剑”的“胆剑”精神，经过十年的积蓄力量，发愤图强，垂．拱．而．治．，终于成就了霸业。 B．几年前，学界几乎没有人不对他的学说大加挞伐，可现在当他被尊奉为大师之后，移．樽．就．教．的人简直要踏破他家的门槛。
格。如是我闻：在美国期间，钱学森仅仅为了解决一道薄壳变形的难题，研究的手稿就积累了厚厚一大摞，在工作进展到五百多页时，他的自我感觉是，不满意！直到八百多页时，才长舒一口气。他把手稿装进牛皮纸信封，在外面标明“最后定稿”，继而觉得不妥，又在旁边添上一句，“在科学上没有最后！”

复合函数的零点问题 - 副本

3、解方程f (t)=0，求出t的值 t不一定能求出具体的值
4、解方程g(x) t，求出x的值或者个数
常常采用数形结合
5、小结，得到复合函数的零点或零点个数
课堂练习：
1、设定义域为R的函数
f
(
x)

|
x
1 1
x |

1 ,
若关于x的方程
1x 1
f 2 (x) bf (x) c 0有3个不同的解x1, x2 , x3,则x12 +x22 +x32 = 5
答案
2、已知函数y 关于x的方程[
f
(
fx)(]x2)是a定 f (x义) 域b为0R有的5偶个函不数同，实当数x根，0a时，bf的 x取值（范15612围）xx为 2 01x54x,122，
常数形结合
再代入
f
(x)

2 t可得
f
(x)
， f
(x)
1
2
结合图象可知各有两个解
y1 2
y 2
（1）方程 f g x 0 有且只有 6 个根（2）方程 g f x 0 有且只有 3 个根例2：（已3知）方y 程 ff (xf)x和y0有g且(x只)有在5x个根[2,（24]）的方图程象g 如g 下x，完0 有成且下只列有问4 题个根：
A. 1
B. 2
C. 3
D. 4
答案解析
题型二、复合函数零点中含参数的有关问题
例有38：个已不知等函的数实f 数x根，e则xx21a,x的2x取0值 1, x范围0，是关3于 ax的143方程答f 案2
x
3f x
数形结合

北师大版六年级上册数学周长相等时谁的面积最大精品练习题 (5) - 副本

【周长相等时谁的面积最大】
例1一根绳子长31.4米，用它围成正方形面积大，还是围成的圆面积大？计算一下，比比看。

【圆环面积】
例2、一个圆形花坛，直径是10米，在它的外墙铺一条1米宽的小路，这条小路的面积是多少平方米？
【组合图形面积】
例3、下面的图形是一个边长为10厘米的正方形，计算阴影部分的面积是多少平方厘米？
1、大圆直径比小圆直径长6厘米，小圆与大圆半径的比是1：4，大圆面积比小圆面积大（）平方厘米。

2、公园里自动旋转喷灌装置半径是10米，它的最大喷灌面积是（）平方米。

3、一根铁丝可以围成一个长40厘米，宽22.8厘米的长方形，如果用这根铁丝围成一个圆，面积是（）平方厘米
4、把一个圆剪拼成一个和它面积相等的长方形，周长增加了6厘米，原来这个圆的面积是（）平方厘米。

5、在一个半径为6厘米的圆内画一个最大的正方形，这个正方形的面积是（）平方厘米。

6、一根铁丝长62.8厘米，用它围成两个相等的圆，则两个圆的面积之和是（）平方厘米。

7、如果一个圆的直径与正方形边长相等，那么圆的面积（）正方形的面积。

A、大于
B、等于
C、小于
8、计算下图阴影部分面积。

(单位：厘米)
2 2
2
9、一个圆形花坛，周长是37.68米，绕着它的周围在外沿修一条宽为1米的小路，这条小路的面积是多少平方米？。

高考语文《语言文字运用》真题练习含答案的副本

高考语文《语言文字运用》真题练习含答案一、[2023·全国乙卷]阅读下面的文字，完成1～3题。

郭老头、耿老头，俩老头。

这两个老头，从前面看，像五十岁；从后面看，像三十岁。

他们今年都已经做过七十整寿了。

身体真好！郭老头能．吃饭。

斤半烙饼卷成一卷，攥在手里，蘸一点汁，几口就下去了。

他这辈子没有牙疼过。

耿老头能喝酒。

他拿了茶碗上供销社去打酒，一手接酒，一手交钱。

售货员找了钱给他，他亮着个空碗：“酒呢？”售货员有点恍惚：记得是打给他了呀？——售货员低头数钱的功夫，二两酒已经进了他的肚了。

俩老头非常“要好”——这地方的方言，“要好”是爱干净爱整齐的意思。

不论什么时候，上唇的胡子平斩乌黑，下巴的胡子刮得溜光。

浑身的衣服，袖子是袖子，领子是领子，一个纽扣也不短。

俩老头还都爱穿撒鞋，斜十字实纳帮，皮梁、薄底，是托人在北京步云斋买的。

这种鞋过去是专门卖给抬轿的轿夫穿的，后来拉包月车的车夫也爱穿，抱脚，精神！俩老头焦不离孟，孟不离焦。

年下办年货，一起去；四月十八奶奶庙庙会，一起去；开会，一起到场；送人情出份子，一起进门。

生产队有事找他们，队长总是说：“去！找找俩老头！”“俩老头”不是“两个老头”的意思，是说他们特别亲密的关系。

类似“哥俩”“姐俩”。

按说应该叫他们“老头俩”，不过没有这么说话的，所以人们只能叫他们“俩老头”。

1．下列句子中的“能”与文中加点的“能”，意义和用法相同的一项是()A．她尽量高高地踮起脚尖，希望车厢里的人能看见她的脸。

B．我们班同学就数他能说，讲起话来口若悬河、滔滔不绝。

C．新颁布的控烟条例规定，绝大多数公共场所都不能吸烟。

D．以前这条小河上没有桥，人们只能涉水而过，非常不便。

答案：B解析：分析词语的意义和用法。

A、C、D三项中的“能”意为“能够”。

B项中的“能”意为“会，善于”，与文中的“能”意义与用法相同。

2．下列句子中画横线部分与文中画横线部分的语句，用法和作用相同的一项是() A．稗子的叶很像稻叶，但稻子是稻子，稗子是稗子，要分清楚。

三年级下册数学课本练习题 - 副本

2、甲地距离乙地大约400千米。

乘火车大约需要2小时，乘长途汽车大约需5小时。

火车平均每小时比汽车快多少千米？3、一根丝带长90厘米。

①对折一次剪开，每段长多少厘米？②再将每段丝带剪成同样长的3小段，每小段长多少厘米？5、玩具：小熊9元小球6元文具：文具盒8元钢笔5元①李老师从上面的玩具和文具中各选择了一种购买。

买玩具共花了 114元，买文具共花了 125元。

李老师买了哪种玩具、哪种文具？各买了多少？②如果李老师用这些钱只买文具盒，可以买多少个？6、小红读一本故事书，翻开书后，发现左右两页的页码和是185。

请你算一算小红翻开的是哪两页。

7、一对藤椅共404元，4把餐椅共424元。

每把藤椅比每把餐椅贵多少钱？8、一台小型碾米机5小时碾米320千克。

照这样计算，8小时碾米多少千克？10、3位老师带50名学生参观植物园，票价成人10元/人，学生5元/人，团体（10人及以上）6元/人，怎样买最票划算？12一箱雪糕有 30根，杨叔叔4 天卖了 8 箱雪糕。

（1）杨叔叔平均每天卖多少根雪糕？（2）每根雪糕卖3元，杨叔叔4天卖了多少元钱？13、用7颗纽扣可以缝制一朵纽扣花。

刘阿姨要缝制68朵这样的纽扣花。

估计一下买300颗一包的纽知够不够。

买500颗一包的呢？14、用90厘米长的丝绳可以编一个中国结。

王阿姨有一捆10米长的丝绳，要编8个这样的中国结，够吗？15、一个漏水的水龙头 1 分钟滴水 50 克。

①1 小时滴水多少千克？②1天（24小时）滴水多少千克？16、一个数乘10，得到的数比原来的数大 72。

原来的数是多少？17、张叔叔买了 12 筒羽毛球，每筒12个，每筒42元。

①一共买了多少个羽毛球？②一共花了多少钱？18、一本书有300 页。

（1）如果每天读40页，一个星期（7天）能读完吗？（2）如果每天读22页，两个星期能读完吗？19、每套明信片12张，售价 16元。

今天卖出56套明信片，一共卖了多少钱？.20、李老师带600 元去商店买足球，发现足球的单价高于45元。

高考语文《语言文字运用》真题练习含答案3的副本

高考语文《语言文字运用》真题练习含答案3一、阅读下面的文字，完成1～2题。

人不怕挤。

尽管摩肩接踵，大家也挤不到一处。

像壳里的仁，各自各。

像太阳光里飞舞的轻尘，各自各。

凭你多热闹的地方，窗对着窗，各自人家，彼此不相干。

只要挂上一个窗帘，只要拉过那薄薄一层，便把别人家隔离千万里以外了。

隔离，不是断绝。

窗帘并不堵没窗户，只在彼此间增加些距离——欺哄人、招引人的距离。

窗帘不盖没窗户，只隐约遮掩——多么引诱挑逗的遮掩！所以，赤裸裸的窗口不引人注意，①，惹人窥探猜测，生出无限兴趣。

赤裸裸的真实总需要些掩饰。

白昼的阳光，无情地照彻了人间万物，不能留下些幽暗让人迷惑，让人梦想，让人希望。

②，天空就不会那么单调枯燥。

隐约模糊中，才容许你做梦和想象。

距离增添了神秘。

看不见边际，变为没边没际的遥远与辽阔。

云雾中的山水，暗夜的星辰，希望中的未来，高超的理想，仰慕的名人，心许的“相知”，——隔着窗帘，迷离惝恍，可以产生无限美妙的想象。

如果你嫌恶窗帘的间隔，冒冒失失进门，闯到窗帘后面去看个究竟，赤裸裸的真实只怕并不经看。

人家挂着窗帘呢，别去窥望。

毋宁自己也挂上一个，华丽的也好，朴素的也好。

③，或懒得挂，不妨就敞着个赤裸裸的窗口。

不过，你总得尊重别人家的窗帘。

1．请在文中横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密，每处不超过10个字。

答：答案：①而一扇挂着窗帘的窗户②而有了云霞的掩饰③如果你不屑挂解析：第①处，根据前文中的“赤裸裸的窗口不引人注意”和后文中的“惹人窥探猜测，生出无限兴趣”的相对关系，可以推测出此处应填写“而一扇挂着窗帘的窗户”之类的内容。

第②处，前文说“赤裸裸的真实总需要些掩饰”，并举了“白昼的阳光”的例子，与②处形成对应。

后文中说“天空就不会那么单调枯燥”，补写时应思考怎样才能让天空不单调枯燥，可推测出此处应填写“而有了云霞的掩饰”之类的内容。

③处，根据上下文可推测。

2．用一句话概括各段的段意，每句不超过10个字。

OBCA练习题5

OBCA练习题51. 系统管理员可以根据业务需要创建不同的租户租户具有哪些特性? *A、可以创建自己的用户(正确答案)B、可以创建数据库、表等所有对象(正确答案)C、有独立的information_ schema等系统数据库(正确答案)D、有自己独立的系统变量(正确答案)2. 租户扩容的方法有哪几种? *A、诵过增加系统可用性（如:三副本扩容至五副本）B、通过增大资源池Unit Num(正确答案)C、涌过向集群中增加新的OBServer3. OB支持多种级别的高可用和容灾可以进行如下哪些高可用和容灾部署形式? *A、两地三中心(正确答案)B、同城两机房C、同城三机房(正确答案)D、三地五中心(正确答案)4. 关于OceanBase 的负载均以下说法正确的是? *A、负载均衡i的调度单元是数据库（database）B、负载均衡的调度单元是分区（Partition）(正确答案)C、系统根据一定的策略通过动态调整UNIT的位置和UNIT内副本的位置使得1个Zone(正确答案)D、OceanBase自动完成负载均衡,无法关闭E、负载均衡的调度单元是资源单元（Unit）F、负载均衡的调度单元是租户5. OceanBase租户支持的事务隔离级别包括以下哪些？ *A、读已提交（read-committed）(正确答案)B、可重复读（repeatable-read）(正确答案)C、串行（Serializable）(正确答案)D、不可重复读（non repeatable-read）6. OceanBase数据库支持动态调整租户容量，可以调整单节点的服务能力，也可以调节服务器节点个数。

前者对应... [判断题] *对(正确答案)错7. 分区是OceanBase数据架构的基本单元，是传统数据库的分区表在分布式系统上的实现 [判断题] *对(正确答案)错8. 以下关于变量描述不正确的是？ [单选题] *A、用来控制租户全局（global）级别或者会话（session）级别的属性B、大部分动态生效,少部分需要重建连接C、可以通过show variables;查看变量D、修改全局变量之后不需要重新建立会话,在当前会话即可生效(正确答案)9. “major_freeze_duty_ime”设置为“02:00”意味着什么? [单选题] *A、每日凌晨2点,系统自动发起一次内存冻结操作B、每日凌晨2点,系统自动发起一次备份恢复操作C、每日凌晨2点,系统自动发起一次合并操作(正确答案)D、每日凌晨2点系统自动发起一次转储操作10. 下列有关变量设置描述正确的是？ [单选题] *A、设置 Session级别的变量对当前 Session有效，对其他 Session无效(正确答案)B、设置Global级别和Session级别的变量效果是一样的C、设置Global级别的变量对当前Session有效D、设置Session级别的变量，对所有的Session都有效11. 应用通过OBProxy连接到OceanBase集群，比直连主副本所在的OBServer性能更好？ [判断题] *对错(正确答案)12. 关于OceanBase的负载均衡，以下说法正确的是 *A、系统根据一定的策略，通过动态调整UNIT的位置和UNIT内副本的位置，使得一个Zone内所有Server的资源使用率达到均衡的过程(正确答案)B、OceanBase自动完成负载均衡，无法关闭C、负载均衡的调度单元是租户D、负载均衡的调度单元是数据库（database）(正确答案)E、负载均衡的调度单元是资源单元（Unit）F、负载均衡的调度单元是分区（Partition）13. 假如OBServer进程异常终止，会通过server_permanentoffline time参数值来判断后续的处理策略，以下描述正确的有哪些？ *A、当进程异常终止持续时间<server_permanent_offline_time,此时已缺失部分副本，虽然依然满足多数派，可以保证RPO=0,但存在一定的风险(正确答案)B、当进程异常终止持续时间>server_permanent_ofline_time,会将机器做"临时下线"处理，从其它zone的主副本中，将缺失的数据复制到本zone内剩余的机器上（需要有足够的资源），以维持副本个数(正确答案)C、当进程异常终止持续时间>server_permanent_offline_time,异常终止的observer进程恢复后会自动加入集群，如果已经做过"临时下线"处理，需要从本zone内其它机器上（或者其它zone内）将unit迁移过来D、当进程异常终止持续时间< server_permanent_offline_time,OceanBase暂时不做补副本的处理，以避免频繁的数据迁移14. 普通租户只能设置自己租户的参数，系统租户可以查看和设置所有租户的参数（包括系统租户和普通租户）。

【学科精品】2020届人教版高考一轮复习必修5精选作业：模块仿真高考练(五).doc

模块仿真高考练(五)一、模块语基练(满分30分)Ⅰ.单句语法填空(共10小题；每小题1分，满分10分)1．It is clearly stated that these regulations apply to everyone in the community, without exception.2．He never turned away anyone who asked for his assistance(assist)．3．These men made themselves famous for their courage and bravery (brave)．4．Putting things in place will bring much convenience to our life.5．Inspired_(inspire) by the speech, the little girl made up her mind to work even harder.6．I am deeply impressed by the great changes that have_taken(take) place in the school over the past three years.7．No one could exactly_(exact) tell what was going to happen.8．I really doubt whether we can finish the work in such a short time.9．There's no denying that the attack did a severe injury (injure) to his reputation.10．When he got up from the ground, he found his knee bleeding (bleed)．Ⅱ.选词填空(共10小题；每小题1分，满分10分)When I opened the door, I found my father sitting in his chair, completely absorbed_in smoking.2．I drew_a_conclusion from my own experiences that effort will pay off.3．It is much to_her_credit that Mary continued to work in spite of all the difficulties.4．The professor has suddenly fallen ill. Who can take_the_place_of him to give the lecture?5．Many countries are faced with the problem about how to speed_up economic development.6．I approve_of your earning some money, but please don't neglect your studies.7．Only when we match our words with actions can we make_a_difference in whatever we hope to accomplish.8．I like to have everything in_place.9．You may depend_on it that Tom will give you a hand when you're in trouble.10．Peter will take_up the management of the finance department.Ⅲ.翻译句子(共5小题；每小题2分，满分10分)1．在这样的情形下，理解我们所学习的东西是至关重要的。

第一章练习题-副本

第一章流体及其物理性质一、选择题1、按流体力学连续介质的概念，流体质点是指A 流体的分子；B 流体内的固体颗粒；C无大小的几何点；D 几何尺寸同流动空间相比是极小量，又含有大量分子的微元体。

2、从力学的角度分析，一般流体和固体的区别在于流体A 能承受拉力，平衡时不能承受切应力；B 不能承受拉力，平衡时能承受切应力；C 不能承受拉力，平衡时不能承受切应力；D 能承受拉力，平衡时也能承受切应力。

3、与牛顿内摩擦定律直接有关系的因素是A 切应力与压强；B 切应力与剪切变形速度C 切应力与剪切变形；D 切应力与流速。

4、水的黏性随温度的升高而A 增大；B 减小；C 不变；D 不能确定。

5、气体的黏性随温度的升高而A 增大；B 减小；C 不变；D 不能确定。

6.流体的运动粘度的国际单位是A m2/s；B N/m2；C kg/m；D N.m/s7、以下关于流体黏性的说法不正确的是A 黏性是流体的固有属性；B 黏性是在运动状态下流体具有抵抗剪切变形速率能力的量度；C 流体的黏性具有传递运动和阻滞运动的双重作用；D 流体的黏性随温度的升高而增大。

8、已知液体中的流速分布u-y如图1-1所示，其切应力分布为9、以下关于液体质点和液体微团A 液体微团比液体质点大；B 液体微团比液体质点大；C 液体质点没有大小，没有质量；D 液体质点又称为液体微团。

10、液体的粘性主要来自于液体-----------。

A 分子的热运动；B 分子间内聚力；C 易变形性；D 抗拒变形的能力 11.15o 时空气和水的运动粘度为6214.5510/air m s ν-=⨯，621.14110/water m s ν-=⨯，这说明A 、空气比水的粘性大；B 、空气比水的粘性小；C 空气与水的粘性接近；D 、不能直接比较。

12、以下哪几种流体为牛顿流体？A 空气；B 清水；C 血浆；D 汽油；E 泥浆。

13、下列流体中哪种属牛顿流体？ A 汽油；B 纸浆；C 血液；D 沥青。

高中一轮复习英语译林版必修五Unit1高考拆组训练

必修五 Unit 1 高考拆组训练板块练(一) 阅读理解组块训练——练速度(限时：35分钟)Ⅰ.阅读理解A(2018·辽宁铁岭模拟)Modern life can be stressful. It’s full of pressure and hardships, worries and annoyances. But after years of being dosed up by doctors and seeking solutions on the selfhelp shelves, can most mon plaints be cured through your next holiday?The festival doctor will see you now.A．You will empty your mind with meditation sessions.B．You will be thrilled and your depression will be removed.C．You will burst into tears by watching edy films.D．You will have discussions on the meaning of life.解析：选C 细节理解题。

根据“Apart from 250 edy acts, there will be walkabout theatre, circus acts and lots of new edy films to make you laugh to tears”可知，在Just for Laughs中有很多喜剧，让你笑到流泪，可以治愈悲伤的情绪，故选C。

2．Where can you spend a few days if you are thinking too much about work?A．At the Wanderlust Festival.B．At HowTheLightGetsIn.C．At Just for Laughs.D．At Ireland’s matchmaking festival.解析：选B 细节理解题。

综合练习15-副本

江苏省石庄高级中学2014-2015学年度第一学期高二年级综合（14）理数学试题备课组长：包科人：一、填空题（本大题共14小题，每小题5分，共70分）1. 如果复数2()(1)m i mi ++是实数，则实数m =__________________.2. 写出命题:“若x =3，则x 2-2x -3=0”的否命题: ．3. 椭圆221132x y m m +=--的焦距为6，则m = ． 4.抛物线y 2＝x 上一点P 到焦点的距离是2，则P 点坐标为5.由直线y ＝x ＋1上的一点向圆(x －3)2＋y 2＝1引切线，则切线长的最小值为________． 6．给出下列命题:(1)若一个平面经过另一个平面的垂线,那么这两个平面相互垂直;(2)若一个平面内的两条直线与另一个平面都平行,那么这两个平面相互平行; (3)若两条平行直线中的一条垂直于直线m ,那么另一条直线也与直线m 垂直;(4)若两个平面垂直,那么一个平面内与它们的交线不垂直的直线与另一个平面也不垂直. 其中,所有真命题的序号为 .7.若实数x ,y 满足014422=---+y x y x ，则使x-y+m ＞0恒成立的实数m 的取值范围是 . 8．在平面几何里,我们知道，正三角形的外接圆和内切圆的面积之比是1:4．拓展到空间，研究正四面体（四个面均为全等的正三角形的四面体）的外接球和内切球的体积关系,能够得出的准确结论是:正四面体的外接球和内切球的体积之比是．9.若命题“0322>--ax ax 不成立”是真命题，则实数a 的取值范围是________．10.在平面直角坐标系xoy 中，圆C 的方程为015822=+-+x y x ，若直线2-=kx y 上至少存有一点，使得以该点为圆心，1为半径的圆与圆C 有公共点，则k 的取值范围是．11.已知圆4)3(22=+-y x 和过原点的直线kx y =的交点为P 、Q ，则|OP |·|OQ |的值为_______________．12.已知抛物线y 2＝8x 的焦点为F ，抛物线的准线与x 轴的交点为K ，点A 在抛物线上且AK ＝2AF ，则△AFK 的面积为________．13.椭圆C ：22221(0)x y a b a b+=>>与x 轴正半轴交于点A ，O 为坐标原点，若椭圆上存有一点M ，使MA MO ⊥，则椭圆C 的离心率e 的取值范围为．14.在平面直角坐标系xoy 中，给定两点()2,1-M 和()4,1N ，点P 在x 轴上移动，当MPN ∠取最大值时，点P 的横坐标为．二．解答题15.求实数m 的取值组成的集合M ，使当M m ∈时，“q p 或”为真，“q p 且”为假．其中:p 方程012=+-mx x 有两个不相等的负根；:q 方程01)2(442=+-+x m x 无实数根．16.如图，在三棱锥D ABC -中，已知BCD 是正三角形，AB ⊥平面BCD ，E 为BC 的中点，F 在棱AC 上，且3AF FC =．（1）求证AC ⊥平面DEF ；（3）若M 为BD 的中点，问AC 上是否存有一点N ，使MN ∥平面DEF ？若存有，说明点N 的位置；若不存有，试说明理由．17.已知方程054222=+--+m y mx y x 表示的曲线是圆C .（1）求m 的取值范围；（2）当2-=m 时，求圆C 截直线012:=+-y x l 所得的弦长；（3）若C 与直线012=+-y x 相交于N M ,两点，且以MN 为直径的圆过坐标原点O ，求m 的值.18.已知抛物线)0(22>=p px y 的焦点为F ，A 是抛物线上横坐标为4、且位于x 轴上方的点，A 到抛物线准线的距离等于5.过A 作AB 垂直于y 轴，垂足为B ，OB 的中点为M.（1）求抛物线方程；（2）过M 作FA MN ⊥，垂足为N ，求点N 的坐标；（3）以M 为圆心，MB 为半径作圆M ，当)0,(m K 是x 轴上一动点时，讨论直线AK 与圆M 的位置关系.19.设椭圆22221(0)x y a b a b +=>>的左焦点为F ，上顶点为A ，过A 且与AF 垂直的光线经椭圆的右准线c a x 2=反射，反射光线与直线AF 平行.（1）求椭圆的离心率；（2）设入射光线与c a x 2=的交点为B ，过A 、B 、F 三点的圆恰好与直线033=+-y x 相切，求椭圆的方程.20.已知两圆9)1(:221=+-y x C ，1)1(:222=++y x C ，动圆在圆1C 内部与圆1C 相内切，与圆2C 相外切.(1)求动圆圆心C 的轨迹方程；（2）已知)0,2(-A ，过A 作斜率为21,k k 的两条直线交曲线C 于E D ,两点，且221=⋅k k ，求证：直线DE 过定点，并求出该定点坐标.高二数学（文科）基础小练（11）ABOFxy制作人：刘小明审核人：胡志斌考查范围：立体几何，圆锥曲线备课组长：包科人：姓名班级1.若2(1i)1+i a b +=-（a b ∈R ,，i 是虚数单位），则i a b += ．2.已知C z ∈,12=-i z ，则1-z 的最大值是3.已知“x－a<1”是 “x 2－6x<0”的必要不充分条件，则实数a 的取值范围________4.已知圆C 关于y 轴对称，经过点A (1,0)，且被x 轴分成两段，弧长之比为1∶2，则圆C 的方程为_______．5.如图所示，已知三棱柱ABC －A 1B 1C 1的所有棱长均为1，且AA 1⊥底面ABC ，则三棱锥B 1－ABC 1的体积为________．6.圆064422=++-+y x y x 上到直线05=--y x 的距离等于22的点有个．7.设命题p ：|log2x +12 |≤12，命题q : x 2-(2a +1)x +a (a +1)≤0，若┐p 是┐q 的必要不充分条件，则实数a 的取值范围是．8.若双曲线()222210,0x y a b a b-=>>的渐近线与抛物线21y x =+相切，则该双曲线的离心率为．9.命题p ：对任意实数x 都有210ax ax ++>恒成立；命题q ：关于x 的方程20x x a -+=有实数根。

副本-第三章本量利分析练习题(答案)(最新整理)

第三章练习题一、单选1、（A）是本—量—利分析最基本的假设，是本—量—利分析的出发点。

A、相关范围假设B、模型线性假设C、产销平衡假设D、品种结构不变假设2、在各种盈亏临界图中，（B）更符合变动成本法的思路。

A、传统式Ｂ、贡献毛益式Ｃ利量式Ｄ、单位式３、在单位盈亏临界图中，产品销售单价线与（A）的交点即为盈亏临界点。

Ａ单位成本线Ｂ单位固定成本线Ｃ单位变动成本线Ｄ利润线４、已知Ａ企业为生产和销售单一产品企业，A 企业计划年度销售量为１０００件，销售单价为５０元，单位变动成本20 元，固定成本总额20000 元，则销售量、单价、单位变动成本、固定成本各因素的敏感程度由高到低排列是（A）Ａ、单价>销售量>单位变动成本>固定成本Ｂ、单价>单位变动成本>销售量>固定成本Ｃ、单价>单位变动成本>固定成本>销售量Ｄ、单价>销售量>固定成本>单位变动成本５、在利量式盈亏临界图中，若横轴代表销售额，则利润线的斜率代表（C）Ａ、单位边际贡献B、变动成本率C、边际贡献率D、单位变动成本6、某企业只生产一种产品，单位变动成本为36 元，固定成本总额4000 元，产品单位售价56 元，要使安全边际率达到50％，该企业的销售量应达到（A）件。

A、400B、222C、143D、5007、下列各式中，其计算结果不等于变动成本率的是（B）A 、1－边际贡献率B、1－达到盈亏临界点的作业率C、单位变动成本/单价×100％D、变动成本/销售收入×100％8、下列措施中只能提高安全边际而不能降低盈亏临界点的是（B）A、提高单价B、增加销售量C、降低单位变动成本D、压缩固定成本开支9 某单位某产品的单价为40 元，单位变动成本为30 元，固定成本为20000 元，目标净利润为26800 元，所得税税率为33％，则实现目标净利润的销售量为（A）。

A、6000 件B、5000 件C、4680 件D、5500 件10、下列因素单独变动时，不会导致盈亏临界点随之变动的是（A）A、销售量B、单位变动成本C、固定成本D、单价11、下列各项指标中，其数值越小，说明企业经营的安全程度越大的是（D）A、安全边际率B、经营杠杆率C、边际贡献率D、达到盈亏临界点作业率12、某企业只经营一种销量不稳、单位边际贡献大于零、盈亏临界点销售量为1600 件的产品。

高考英语总复习Book6Unit5Thepowerofnature练习(含解析)新人教版

Book 6 Unit 5 The power of nature(主题语境:人与自然——自然生态)第一步默写达标分层单词▶写作词汇1. guarantee vt.保证;担保2. panic vi. & vt.惊慌n.惊慌;恐慌3. tremble vi.摇晃;颤抖;摇动4. shoot vt.射中;射伤5. wave n.波浪;波涛vi.波动;起伏;挥手6. diagram n.图解;图表;示意图7. potential adj.可能的;潜在的n.潜在性;可能性;潜能8. precious adj.贵重的;珍贵的▶阅读词汇1.sweat n. 汗vi.出汗2.questionnaire n. 问卷;调查表3.document n. 文件;证件4.typhoon n. 台风5.candidate n. 候选人;候补者6.fountain n. 喷泉;源泉v.泉水般地喷出或涌出7.alongside adv. 在旁边;沿着边prep.在……旁边;沿着……的边8.hurricane n.飓风;风暴9.database n.数据库;资料库▶拓展词汇1. actual adj.实在的;实际的→actually adv.实际上2. suit vt.适合;使适宜n.套装;一套外衣→suitable adj.合适的;适当的3. anxious adj.忧虑的;不安的→anxiety n.担心;焦虑;渴望4. appreciation n.欣赏;感激;感谢→appreciate vt.欣赏;感激5. appoint vt.任命;委派→appointment n.约会,约定;任命,委任6. equipment n.设备;装备→equip vt.装备7. bathe vi.洗澡;游泳→bath n.洗澡8. threat n.恐吓;威胁→threaten v.威胁;恐吓9. erupt vi. (指火山)爆发;突然发生→eruption n.火山爆发;(战争等)爆发10. evaluate vt.评估;评价;估计→evaluation n.评估11. comfort vt.安慰→comfortable adj.合适的;舒适的→uncomfortableadj.(反义词)不舒服的;不舒适的12. absolute adj.绝对的;完全的→absolutely adv.绝对地;完全地13. conscious adj.有知觉的,有意识的→unconscious adj.(反义词)失去知觉的;未察觉的→consciously adv.有意识地14. diverse adj.多种多样的;不同的→diversity n.多种多样;多样性15. fog n.雾→foggy adj.有雾的;记忆模糊的高频短语1. compared with/to 与……相比2. glance through 匆匆看一遍3. protect...from... 保护……免受……伤害4. make one's way 前往5. be about to do sth. 即将做某事;马上就要做某事6. vary from...to... 由……到……不等7. be appointed as 被委派为8. burn to the ground 全部焚毁9. give birth to 生下;产生经典句型1. It is said that (据说)this boy, who had a great gift for languages and persuasion, is the father of the Manchu people.(It's said that...)was about to go back to sleep (刚要回去继续睡觉) when suddenly my bedroom became as bright as day.(be about to do...when...)3. Having collected and evaluated the information (收集和评估过这些信息之后), I help other scientists to predict where lava from the volcano will flow next and how fast.(having done)4.Yet, however weak we are (无论我们多么脆弱), we are not completely powerless.(however)5.The other two climbed down into the crater to collect some lava for later study, but this being my first experience (是我的第一次经历), I stayed at the top and watched them.(独立主格)第二步语境运用语境词汇运用▶单词拼写(注意所填单词的适当形式变化)1. Actually (实际上), I started to learn kung fu when I was seven years old, butI have long been out of practice. (2020课标全国Ⅱ)2.She was displeased with absolutely (绝对地) everything, nothing was right andI was rather surprised that she became a “regular”.(2020课标全国Ⅲ)3.It's natural that culture as well as traditions varies (变化) from country to country.4.The windows tremble (颤抖) when the trucks drive past our house.5.We had an anxious (焦急的)couple of weeks waiting for the results of the experiment.6.This kind of accommodation offers an independent lifestyle and is more suitable (适合的) for the students who come from the countryside.7.Schools should be lively places where individuals are encouraged to develop their greatest potential (潜力).8.It is widely acknowledged that students should be evaluated (评价) in terms of overall qualities.▶短语填空(注意所填短语的适当形式变化)After 1. giving birth (生下) to a lovely baby, Doctor Alice 2. was appointed as (被委派为) head of some volcanologists. Their job was not only to watch a volcano erupting in the distance, but also to 3. make their way (前往) to the edge of volcanoes and collect some information. While watching, they must learn 4. to protect themselves from (保护自己免受) being hurt by lava. 5. Compared with (与……相比) the fire, the temperature of lava may vary from one hundred degrees to over one thousand degrees. It is so powerful that it can 6. burn everything to the ground (焚毁所有的东西). So if you 7. are about to (即将) watch a volcanic eruption one day, you must make full preparations for it. If necessary, you must leave as quickly as possible after 8. glancing through (匆匆看) the volcanic eruption.▶单句填空(注意所填单词的适当形式变化)1.We had better help children to develop an appreciation of literature and form the habit of appreciating others helping them.(appreciate)2.I felt uncomfortable in my stomach because I ate too much. But after walking,I felt comfortable . (comfort)3.He was anxious to leave and he could not hide his anxiety .(anxious)4.Tom was badly hurt and still unconscious after the accident, but his wife was conscious and was smiling at us consciously . (conscious)5.Our classroom is equipped with a lot of advanced teaching equipment , which is helpful for teaching.(equip)6.He was appointed as manager of the company. But to everyone's surprise, he didn't accept the appointment . (appoint)7.Choose a pair of shoes that suits you best and we'll cycle to a suitable place for a picnic.(suit)经典句型仿写1.(2020课标全国Ⅰ书面表达)我正要放弃,这时老师鼓励我继续努力。