重庆市江津中学、合川中学等七校2018-2019学年高一上学期入学摸底考试英语试卷

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重庆市江津中学、合川中学等七校2018-2019学年高一上学期入学摸底考试化学试题 含解析

重庆市江津中学、合川中学等七校2018-2019学年高一上学期入学摸底考试化学试题 含解析

重庆市江津中学、合川中学等七校2018-2019学年高一上学期入学摸底考试化学试题1.下列过程中不包含化学变化的是()A. 水力发电B. 金属锈蚀C. 饭菜变馊D. 呼吸消化【答案】A【解析】【分析】化学变化是指有新物质生成的变化,物理变化是指没有新物质生成的变化,化学变化与物理变化的本质区别是有无新物质生成,据此抓住化学变化和物理变化的区别结合事实进行分析判断即可。

【详解】A、水力发电的过程中没有新物质生成,属于物理变化;B、金属锈蚀的过程中有新物质生成,属于化学变化;C、饭菜变馊过程中有新物质生成,属于化学变化;D、呼吸消化的过程中有新物质生成,属于化学变化;正确选项A。

2.下列物质既是空气的成分,又属于氧化物的是()A. 氧化铝B. 氧气C. 稀有气体D. 二氧化碳【答案】D【解析】【详解】氧化物是由两种元素组成,且其中一种元素为氧元素的物质;空气的成分包括氮气、氧气、二氧化碳、水蒸气和稀有气体等。

A项,氧化铝由铝元素和氧元素组成,因此属于氧化物,但氧化铝不是空气的成分,故A项错误;B项,氧气是空气的成分,但氧气只由一种元素组成,不属于氧化物,故B项错误;C项,稀有气体是空气的成分,但稀有气体属于混合物,不属于氧化物,故C项错误;D项,二氧化碳由碳元素和氧元素组成,因此属于氧化物,且二氧化碳是空气的成分,故D项正确;正确答案为D。

3.分类法是学习化学的重要思想方法,下列物质中有一种与另外三种物质类别不同的是()A. 过氧化氢B. 二氧化硫C. 冰水D. 空气【答案】D【解析】【详解】A、过氧化氢是由一种物质组成的,属于纯净物,故不正确;B、二氧化硫是由一种物质组成的,属于纯净物,故不正确;C、冰水是由一种物质组成的,属于纯净物,故不正确;D、空气是由氧气、氮气等多种物质组成的,属于混合物,故正确;正确选项D。

4.化学学习小组做实验时记录了下列实验现象,其中不正确的是()A. 硫在氧气中燃烧产生明亮的蓝紫色的火焰B. 细铁丝在氧气中剧烈燃烧,火星四射,产生四氧化三铁C. 红磷在空气中燃烧,产生大量白烟D. 干冰升华,周围产生大量白雾【答案】B【解析】【分析】A、根据硫磺在氧气中燃烧的现象进行分析判断;B、根据细铁丝在氧气中燃烧的现象进行分析判断;C、根据红磷在空气中燃烧的现象进行分析判断;D、根据干冰升华的现象进行分析判断;【详解】A、硫磺在氧气中燃烧,发出明亮的蓝紫色火焰,故A选项说法正确;B、细铁丝在氧气中剧烈燃烧,火星四射,生成一种黑色固体,故B选项说法错误;C、红磷在空气中燃烧,产生大量的白烟,故C选项说法正确;D、干冰升华,吸收大量的热,周围产生大量白雾,故D选项说法正确;正确选项B。

英语_2018-2019学年重庆市江津中学、某校等七校联考高一(上)开学英语试卷(含答案)

英语_2018-2019学年重庆市江津中学、某校等七校联考高一(上)开学英语试卷(含答案)

2018-2019学年重庆市江津中学、某校等七校联考高一(上)开学英语试卷Ⅱ. 单项选择(每小题1分,共20分)从A、B、C、D四个选项中选出可以填入空白处的最佳答案,并将答题卷上对应题目的答案标号涂黑.1. On ______ Children's Day,Jack received a prize for being ______ honest boy.()A the; anB /; anC /; aD the; a2. About ______ of the surface of the earth is covered with water.()A three fourthB three fourthsC third fourthD third fours3. It's ________ to make others ________ for you so long.()A polite; to waitB impolite; waitC impolite; waitingD politely; waiting4. Either his parents ________ his brother ________ invited.()A or, wereB or, wasC nor, wereD and, were5. The big box ________ on and I ________ on it.()A is used to sitting; am used to sittingB is used to sit; am used to sitC is used to sitting; am used to sitD is used to sit; am used to sitting6. Your new shirt feels so soft. I want to buy ________, too.()A oneB itC thatD this7. Children ________ to play computer games too long. It may have a bad influence on their eyes.()A shouldn't allowB should allowC shouldn't be allowedD should be allowed8. The population in Japan ________ not very large. But it is reported that about twenty﹣five percent of the population ________ old people.()A is; isB are; areC is; areD are; is9. They look so sad. There must be ________ on TV.()A anything badB bad somethingC something badD everything bad10. By the time I got to school, the first play ________ for nearly half an hour.()A has begunB has been onC had begunD had been on11. ﹣ I'm sorry, Mrs. Black. I ________ my physics homework at home.﹣ Don't forget ________ it to school tomorrow.()A left; to bringB forgot; to takeC lost; to bringD left; to take12. I don't remember ______ the book yesterday.()A where I putB where did I putC where will I putD where I will put13. Though Eric is a boy, he writes _____ I do.()A careful asB more carefully thanC as careful asD carefully than14. ﹣I'm sorry. I took your raincoat by mistake yesterday.﹣Never mind.________, your raincoat is similar to mine.()A In allB First of allC After allD Above all15. The young kids are very ________ to see the ________ movie "Monkey King".()A excited; excitingB excited; excitedC exciting; excitedD exciting;exciting16. At present, lots of people would rather ________ in the country because there is________ pollution in the city.()A live; moreB to live; lessC live; lessD to live; more17. ________ a basketball fan, John is looking forward to ________ the coming World Cup.()A As; watchB For; watchC As; watchingD For; watching18. ______ riding shared bikes(共享单车)is an environmentally friendly way to travel,many of the bikes are thrown everywhere.()A AlthoughB AsC UnlessD Until19. ﹣Mike, Could you tell me if Mary ______ to my party tomorrow?﹣I think she will if she _______ time.()A come; will haveB comes; haveC will come; hasD will come; will have20. ﹣Last month Frank went to Smart China Expo in Chongqing.﹣_______. And _______.()A So did he; so did IB So he did; so I didC So did he; so I didD So he did;so did IⅢ.完形填空(共1小题,满分15分)21. A video show has become a hot topic on the Internet around China these days. The 35﹣second video shows that a man driver took a woman out of her red car, threw her to the ground and (1)_______her several times.Later, the man driver told the police that was because the woman driver changed lanes (变道)(2)_______ and scared his child in the car. That made this man driver very (3)_______. And his anger changed into this fight. The man was blamed (责备) a lot from Internet users, who regarded him as " Crazy or Mad".However, public attitude (态度) soon took a u﹣turn when the video from the dashboard camera (行车记录仪) on the man driver's car was put on the Internet on Tuesday. The (4)_______video shows the woman driver suddenly crossed lanes in front of Zhang's car twice and the two said angry words to each other (5)_______both cars came to a stop under an overhead bridge. And there the fight happened. The latest online poll (民调) shows that 78% Internet users believe that the woman driver should be blamed for (6)_______she had done. However, the woman driver (7)_______ to realize her own mistake and refused to say sorry at first. The discussion further grew when some people started a cyber hunt (人肉搜索) against the woman. Some of her personal (8)_______ was put on the Internet, including her ID number, address, phone number and so on.(9)_______the morning of May 11, the woman driver finally wrote a letter to say sorry to the public, and put it on the Internet, saying that she felt sorry for what she had done and what her family had (10)_______about this accident. Both of the two have paid for what they had done! So when we drive on the road, try to be calm enough to avoid such happenings again.(1)A beatingB to beatC beatsD beat(2)A slowlyB quietlyC suddenlyD politely(3)A excitedB surprisedC angryD pleased(4)A 3﹣minutesB 3 minute'sC 3﹣minuteD 3 minutes(5)A afterB beforeC whileD until(6)A howB whatC thatD which(7)A choseB decidedC agreedD failed(8)A newsB informationC matterD plan(9)A InB FromC OnD Till(10)A talkedB saidC toldD spokenⅣ. 阅读理解(共30分)阅读下列材料,从A、B、C、D四个选项中选出最佳答案,并将答题卷上对应题目的答案标号涂黑.22. My Favorite SweaterBy Bonnie Highsmith Taylor(1)Who is the writer of the poem?________A The grandma.B Miss Taylor.C A kitten.D Queen..(2)How old is the girl in this poem now?________A 3.B 4.C 5.D 6..(3)Whose name is Queen?________A The girl's.B Her grandma's.C Her mother's.D The cat's..(4)The underlined word "kittens" most probably means________.A a kind of foodB baby catsC a kind of drinkD a bed for a baby.23. Most animals on land are known to us, but many living things underwater are not. Now let's get to know some of them.Sea cucumberSea cucumber are strange animals living at the bottom of the sea. They wear brown or pale green coats with many sticks up. When summer comes, they stay deep to sleep because they are afraid of heat. And when it is autumn, they move to shallow (浅的)water and get their food.PikeThe pike is a kind of freshwater fish. They are good swimmers and like swimming near boats, waiting to be fed. They have sharp teeth to catch fishes. When they areyoung, they live in groups. However, when they grow up, they prefer to live alone.CuttlefishA cuttlefish can swim quite fast, so it is also called rocket (火箭) fish. It has eight arms and two feelers on its head, just around its mouth. It ejects ink (喷墨) when it is in danger. Its meat is delicious, and it is often the first choice for many people.OctopusAn octopus has long arms, with which to catch food and protect itself. When it is sleeping, one or two of its arms are still on duty, keeping moving. Once it feels something dangerous, it can wake up at once to take action.(1)Sea cucumbers stay deep to sleep in summer because they________.A are afraid of high temperatureB want to get strong and fatC are afraid of their enemyD want to live alone.(2)According to the passage,________ likes to swim near boats.A the sea cucumberB the pikeC the cuttlefishD the octopus.(3)What happens if a cuttlefish meets its enemy?________A It rushes at the enemy at once.B It cuts off one of its arms.C It bites with its sharp teeth.D It ejects ink to the enemy..(4)The________ of an octopus can help protect it when in danger.A colorB armsC soundD smells.24. When I was in primary school, I had an argument with a boy in my class. I thought that "I" was right and that "he" was wrong. But he thought "I" was wrong and "he " was right.The teacher asked him to stand on one side of her desk and me on the other. In the middle of her desk was a large and round ball. I could see it was black. She asked what color the ball was. "White, " he answered.I couldn't believe the boy's answer, because from my side it was ________ black!The teacher told me to stand in the boy's place and told him to stand in my place. We changed our places, and then the teacher asked me what color the ball was. I had to answer, "White."It was a ball with two different colors. From his side it was white. Only from my side was it black.My teacher taught me a very important lesson that day: You must stand in other people's shoes and look at the situation through their eyes in order to truly understand their view.(1)The writer was________ when the story happened.A a primary school studentB a middle school studentC a primary school teacherD A middle school teacher..(2)The Chinese meaning of the word "obviously" in this passage is probably "________".A 奇怪地 B 有点儿 C 明显地 D 不可能.(3)After they changed their places, the writer had to answer that the ball was white because________.A he didn't want to make the teacher angryB the boy had said it was whiteC he understood that the teacher was rightD the ball was white from this side.(4)The best title of this passage may be________.A A Boy and MeB Black and WhiteC A Clever TeacherD A Special Ball.25. Researchers have discovered the first Earth﹣sized planet.It was first marked by scientists' using NASA's Kepler telescope(望远镜), so it's called Kepler﹣186f.It lies about 500 light years from Earth and goes around its star.The planet is the right distance from its star for water: not too close or not too far.Water is one important condition that scientists guess is necessary for life.So it could have water and possible life.It's called a true Earth cousin."This planet is an Earth cousin, not an Earth twin, "said Barclay, who is among a team of scientists reporting on the discovery in the magazine Science this week."It's very exciting to find a planet similar to the Earth, "Barclay said."It's not easy work because things change as we get more measurements."Scientists don't know anything about the air of Kepler﹣186f, but it will be a task for future telescopes which can study for chemicals that have something to do with life."It's possible for life to live in this planet, but that doesn't mean there is life in it, "Barclay said.So far, scientists have found nearly 1, 800 planets in the universe."The past year has seen a lot of progress in the search for Earth﹣like planets.Kepler﹣186f is very important because it is the first planet that is the same temperature and is almost the same size as Earth, "scientist David Charbonneau wrote in an email.(1)Scientists have already found about________ planets now.A 500B 186C 1,800D 1,801.(2)Which of the following about Kepler﹣186f is NOT true according to the passage?________A It could have water and possible life,so perhaps we might live there.B It's almost as hot as and as large as Earth.C In the future,scientists will study the chemicals of it by telescope.D It's an Earth﹣like planet..(3)What is the best title of the passage?________A Space research.B Journey to space.C Is there water and possible life in Kepler ﹣186f?D Scientists discover the most Earth﹣like planet.Ⅴ. 口语应用(每小题5分,共5分)阅读下面对话,从方框内7个选项中选择5个恰当的句子完成此对话,并把答案写到答题卷上对应题目的横线上.26.Ted: Hi, Bob! Eating fried chicken?(1)_______Bob: Eggs and milk? I don't want to have them every day.(2)_______Ted: But don't have too much unhealthy food.(3)_______Bob: OK, I won't. By the way, I find some students throw away eggs and milk.Ted: That's too bad.(4)_______Bob: Yes. But what do you think we can do?Ted:(5)_______Bob: Let's have a try, then we may have different kinds of food every day.Ⅵ. 任务型阅读.(共8分)27. While many students raise their hands in class to ask or answer questions, some people outside school raise their hands to get others' attention. Recently, the project "Raise Your Hands for Luca" has made people realize they can also do something amazing by raising their hands to help a brave boy named Luca Williams.Luca comes from England. When he was three, he lost his legs because of a terrible illness. Luca's parents started the Raise Your Hands for Luca Project. They hoped to raise 1.5 million pounds to buy Luca prosthetic legs (假肢) and to pay for the care he needs.Since then, many people have joined up by writing " For Luca" on their hands and putting the picture of it onto the website. The project has also caught many big stars' eyes such as the world famous football star Maradona. Mickey Mouse also joined the project to help Luca. By now, the project has raised about 225,000 pounds for the little boy.(1)Have many famous people joined in the project?________(2)What happened to Luca when he was three?________(3)Who started the Raise Your Hands for Luca Project?________(4)Do you like helping others in trouble? Why or why not?________Ⅶ. 完成句子.(每空1分,共10分)根据所给提示,完成句子.每空一词,含缩略词.28. She has bought a new TV for her mother.(变为一般疑问句)________ she________ a new TV for her mother?29. We will turn off the lights for an hour ________.(对划线部分提问)________ you turn off the lights for an hour?30. Alice is too young to make her own decision.(变为同义句)Alice is not________ to make her own decision.31. 不要担心,他会准时到达这里.(完成译句)________. He will arrive here on time.32. 作为一名中国人,我为我的祖国感到自豪.(完成译句)As a Chinese, I am________ my country.Ⅷ. 短文填空(每空2分,共16分)根据下列短文,在短文后的空格处填上一个恰当的词,使短文完整、通顺,并把答案写到答题卷对应题目的横线上.33. Dear Lucy,I'm happy to receive your letter. I know you have some problems. I have some (1)________ that may help you. First, you should regard the problems (2)________challenges. You think it is very difficult to learn English well. I think you should learn English by (3)________ notes because it's very important. Then you can talk with friends in English as much as you can. It can improve your speaking skills. I'm sorry to hear that you often make mistakes in (4)________. I think you need to do more grammar exercises. You say you can't understand spoken English. Why not (5)________the teachers for help? I think you will make great progress with the help of the teachers. Asfor watching TV, I think your mother is right, you should spend more time on study (6)________ of watching TV. If you get good grades, I'm sure your mother will (7)________you to watch TV. You say you are getting heavier and heavier, what about eating more fruit and vegetables? Don't eat junk food. You should do more exercise (8)________you have time.I believe things will be better. Send you my best wishes.Yours,Lin LinⅨ. 书面表达(共16分)34. 为配合我市开展"创建文明城市(build a civilized city)"活动,学校举办以"How to behave well"为主题的英语征文比赛.现在请你根据以下提示内容,用英语写一篇参赛短文.1.衣着整洁;2.保持环境卫生;3.待人有礼,乐于助人;4.遵守交通规则.注意:1.词数100左右;2.可适当增加细节,以使行文连贯.How to behave well____________________2018-2019学年重庆市江津中学、某校等七校联考高一(上)开学英语试卷答案1. B2. B3. B4. B5. D6. A7. C8. C9. C10. C11. D12. A13. B14. C15. A16. A17. C18. A19. C20. D21. DCCCABDBCB22. BCDB23. ABDB24. ACDB25. CAD26. F,E,A,D,G27. Yes, they have.,He lost his legs because of a terrible illness.,Luca's parents (did).,Yes,Ido;Becausehelpingothersisagoodquality28. Has,bought29. onEarthDay,When will30. old enough31. Don'tworry32. proud of33. advice/suggestions,as,taking,grammar,ask,instead,allow,if34. How to Behave Well?In order to build a civilized city, we students should try our best to behave well in the activities.It's a good habit to keep our clothes clean and tidy.(衣着整洁) Our city should be kept clean every day. Don't throw litter or spit about.(保持环境卫生) It's good manners to say "Thank you" and "Please" and so on. We should never say dirty words. Be friendly to others and always ready to help the people in need. For example, when we are on a bus,we should give our seats to the old and the women with babies.【高分句型一】(待人有礼,乐于助人)We should also obey traffic rules. When the traffic lights are red, we should stop. And we'd better not talk or laugh loudly in public.(遵守交通规则)If everyone behaves well, our city will be more beautiful and more attractive.【高分句型二】(总结)。

重庆市江津中学、合川中学等七校2018-2019学年高一上学期期末考试化学试题

重庆市江津中学、合川中学等七校2018-2019学年高一上学期期末考试化学试题

2018—2019学年度第一学期期末七校联考高一化学试题可能用到的相对原子质量:H:1C:12N:14O: 16Na:23S:32 Cl:35.5Fe:56★祝考试顺利★注意事项:1、答题前,请先将自己的姓名、准考证号用0.5毫米黑色签字笔填写在试题卷和答题卡上的相应位置,并将准考证号条形码粘贴在答题卡上的指定位置。

用2B铅笔将答题卡上试卷类型A后的方框涂黑。

2、选择题的作答:每个小题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑。

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写在试题卷、草稿纸和答题卡上的非答题区域的答案一律无效。

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答案用0.5毫米黑色签字笔写在答题卡上对应的答题区域内,写在试题卷、草稿纸和答题卡上的非选修题答题区域的答案一律无效。

5、保持卡面清洁,不折叠,不破损,不得使用涂改液、胶带纸、修正带等。

6、考试结束后,请将本试题卷、答题卡、草稿纸一并依序排列上交。

第I卷(选择题共48分)一、选择题(共16小题,每小题只有一个正确选项,每小题3分,共48分)1.一些装有化学物质的车辆常贴有危险化学品的标志。

下列标志中,应贴在装有汽油的运输车辆上的是()A B C D2.合金是一类用途广泛的金属材料。

下列物质中,不属于合金的是()A.不锈钢B.青铜C.硬铝D.水银3.下列化学物质在实际生产、生活和科技等方面的叙述正确的是()A.二氧化硅是太阳能电池的主要材料B.SO2、漂白粉、活性炭、Na2O2都能使品红溶液褪色,其原理相同C.在食品袋中放入装有硅胶、铁粉的透气小袋,可防止食物受潮、氧化变质D.某雨水样品放置一段时间后,酸性增强,是因为溶解了CO24.下列离子方程式书写正确的是()A.钠与水反应:2Na+2H2O=2Na++2OH-+H2↑B.向FeCl3溶液中加入几滴KSCN溶液:3SCN- + Fe3+═Fe(SCN)3↓C.稀硫酸和氢氧化钡溶液反应:Ba2++SO42-=BaSO4↓D.碳酸钙与盐酸反应:CO32-+2H+=CO2↑+H2O5.设N A为阿伏加德罗常数,下列叙述中正确的是()A.标准状况下,22.4 L SO3含有的分子数为N AB.1mol氯气与足量铁粉充分反应,转移的电子数为3N AC.16 g O2和O3的混合气体中含氧原子数目为N AD.1mol •L-1 Na2CO3溶液中含有Na+数目为2N A6.“分类”是一种思想方法,在化学发展中起到了重要的作用。

重庆市江津中学、合川中学等七校1819学年度高一上学期入学摸底考试——英语(英语)

重庆市江津中学、合川中学等七校1819学年度高一上学期入学摸底考试——英语(英语)

重庆市江津中学、合川中学等七校2018—2019学年度上学期入学摸底考试高一英语试题本试卷分为第Ⅰ卷(客观题)和第Ⅱ卷(主观题)两部分。

满分150分,考试时间120分钟。

注意事项:1.答题前,务必将自己的姓名、准考证号等填写在答题卷规定的位置上。

2.答选择题时,必须使用2B铅笔将答题卷上对应题目的答案标号涂黑。

3.答非选择题时,必须使用0.5毫米黑色签字笔,将答案书写在答题卷规定的位置上。

4.考试结束后,将答题卷交回。

第I卷(共100分)I. 听力测试。

(共30分)第一节:情景反应。

(每小题1.5分,共9分)听一遍。

根据你所听到的句子,从A、B、C三个选项中选出最恰当的答语,并将答题卷上对应题目的答案标号涂黑。

( ) 1. A. Russia. B. It’s great. C. 66 Chinese players.( ) 2. A. It’s a beautiful city. B. It’s cloudy. C. It’s clean.( ) 3. A. Sorry, I won’t. B. Yes, I will. C. Here you are.( ) 4. A. Every two months. B. For one month. C. In a month.( ) 5. A. OK, no problem. B. I’m busy now. C. You can do it by yourself.( ) 6. A. Me,too. B. I agree. C. Well done.第二节:对话理解。

(每小题1.5分,共9分)听一遍。

根据你所听到的对话和问题,从A、B、C三个选项中选出正确答案,并将答题卷上对应题目的答案标号涂黑。

( ) 7. A. At 7:00. B. At 7:30. C. At 8:00.( ) 8. A. Use mobile phones B. Eat lunch. C. Play games.( ) 9. A. Stay Away From The World. B. Keep Away From The World.C. Stay Away From The Words.( ) 10. A. For 5 years. B. For 8 years. C. For 13 years.( ) 11. A. Interesting. B. Not very interesting. C. Exciting.( ) 12. A. Being alone. B. Taking tests. C. Speaking in front of others.第三节:短文理解。

重庆市江津中学、合川中学等七校2018-2019学年高一上学期期末考试数学试题(解析版)

重庆市江津中学、合川中学等七校2018-2019学年高一上学期期末考试数学试题(解析版)

2018—2019学年度第一学期期末七校联考高一数学试题一、选择题:共12小题,每小题5分,共60分.在每个小题给出的四个选项中,只有一项是符合题目要求的一项.1.已知集合,,则()A. B. C. D.【答案】B【解析】【分析】由集合的交集定义直接求解即可.【详解】集合,,所以.故选B.【点睛】本题主要考查了集合的交集运算,属于基础题.2.函数的定义域为()A. B.C. D.【答案】D【解析】试题分析:由函数的解析式可得,Lgx-1≠0, x>0,即0<x<10或10<x,故函数定义域为,故选D.考点:函数定义域.3.已知角的终边经过点,则()A. B. C. D.【答案】D【解析】由任意角的三角函数定义列式求解即可.【详解】由角的终边经过点,可得.故选D.【点睛】本题主要考查了任意角三角函数的定义,属于基础题.4.已知向量,,若,则实数的值为()A. 或B.C.D. 或3【答案】A【解析】【分析】先求的坐标,再由向量垂直数量积为0,利用坐标运算即可得解.【详解】由向量,,知.若,则,解得或-3.故选A.【点睛】本题主要考查了向量垂直的坐标表示,属于基础题.5. 下列函数中,既是奇函数又存在零点的函数是()A. B. C. D.【答案】A【解析】试题分析:因为是偶函数,故B错误;是非奇非偶函数,故C错误;是非奇非偶函数,故D错误;故选项为A.考点:(1)函数的奇偶性;(2)函数的零点.6.如图,,下列等式中成立的是()A. B.C. D.【分析】本题首先可结合向量减法的三角形法则对已知条件中的进行化简,化简为然后化简并代入即可得出答案。

【详解】因为,所以,所以,即,故选B。

【点睛】本题考查的知识点是平面向量的基本定理,考查向量减法的三角形法则,考查数形结合思想与化归思想,是简单题。

7.根据表格中的数据可以判定方程的一个根所在的区间为()1A. B. C. D.【答案】C【解析】【分析】令,由表中数据结合零点存在性定理即可得解.【详解】令,由表格数据可得.由零点存在性定理可知,在区间内必有零点.故选C.【点睛】本题主要考查了零点存在性定理,属于基础题.8.将函数图象向左平移个单位,所得函数图象的一个对称中心是()A. B. C. D.【分析】先由函数平移得解析式,再令令,结合选项即可得解.【详解】将函数图象向左平移个单位,可得.令,解得.当时,有对称中心.故选D.【点睛】本题主要考查了函数的图像平移及正弦型三角函数的对称中心的求解,考查了学生的运算能力,属于基础题.9.设定义在R上的函数满足,且,当时,,则()A. B. C. D.【答案】C【解析】【分析】结合函数的周期性和奇偶性可得,代入解析式即可得解.【详解】由,可得.,所以.由,可得.故选C.【点睛】本题主要考查了函数的周期性和奇偶性,着重考查了学生的转化和运算能力,属于中档题.10.已知函数.若,,,则的大小关系为()A. B. C. D.【答案】C【解析】【分析】【详解】根据题意,f(x)=x2﹣2|x|+2019=f(﹣x),则函数f(x)为偶函数,则a=f(﹣log25)=f(log25),当x≥0,f(x)=x2﹣2x+2019=(x﹣1)2+2018,在(0,1)上为减函数,在(1,+∞)上为增函数;又由1<20.8<2<log25,则.则有b<a<c;故选:C.【点睛】本题考查函数的奇偶性与单调性的判断以及性质的应用,属于基础题.11.若函数在区间上单调递增,则实数的取值范围是()A. B. C. D.【答案】C【解析】【分析】根据复合函数单调性之间的关系进行求解即可.【详解】设g(x)=x2﹣ax+1,则要使f(x)=ln(x2﹣ax+1)在区间(2,+∞)上单调递增,由复合函数单调性可得:满足,即,得a,即实数a的取值范围是,故选:C.【点睛】本题主要考查复合函数单调性的应用,结合二次函数的单调性是解决本题的关键,注意真数大于0的条件的应用,属于易错题型..12.已知,方程有三个实根,若,则实数()A. B. C. D.【答案】B【解析】判断f(x)与2 的大小,化简方程求出x1、x2、x3的值,根据得x3﹣x2=2(x2﹣x1)得出a的值.【详解】由1﹣x2≥0得x2≤1,则﹣1≤x≤1,,当x<0时,由f(x)=2,即﹣2x=2.得x2=1﹣x2,即2x2=1,x2,则x,①当﹣1≤x时,有f(x)≥2,原方程可化为f(x)+2f(x)﹣22ax﹣4=0,即﹣4x﹣2ax﹣4=0,得x,由﹣1解得:0≤a≤22.②当x≤1时,f(x)<2,原方程可化为42ax﹣4=0,化简得(a2+4)x2+4ax=0,解得x=0,或x,又0≤a≤22,∴0.∴x1,x2,x3=0.由x3﹣x2=2(x2﹣x1),得2(),解得a(舍)或a.因此,所求实数a.故选:B.【点睛】本题主要考查函数与方程的应用,根据分段函数的表达式结合绝对值的应用,确定三个根x1、x2、x3的值是解决本题的关键.综合性较强,难度较大.二.填空题:本大题共4小题,每小题5分.13.若是幂函数且在单调递增,则实数_______.【答案】2【解析】【分析】由幂函数可得,解得或2,检验函数单调性求解即可.当时,,在不单调递增,舍去;当时,,在单调递增成立.故答案为:.【点睛】本题主要考查了幂函数的定义及单调性,属于基础题.14.已知,则__________.【答案】【解析】.故答案为:.15.学校某研究性学习小组在对学生上课注意力集中情况的调查研究中,发现其在40分钟的一节课中,注意力指数与听课时间(单位:分钟)之间的关系满足如图所示的图象,当时,图象是二次函数图象的一部分,其中顶点,过点;当时,图象是线段BC,其中.根据专家研究,当注意力指数大于62时,学习效果最佳.要使得学生学习效果最佳,则教师安排核心内容的时间段为____________.(写成区间形式)【答案】【解析】【分析】利用待定系数法求出分段函数的解析式,再由y值大于62求解即可得解.【详解】当x∈(0,12]时,设f(x)=a(x﹣10)2+80,过点(12,78)代入得,a则f(x)(x﹣10)2+80,当x∈[12,40]时,设y=kx+b,过点B(12,78)、C(40,50)由题意得,或得4<x≤12或12<x<28,所以4<x<28,则老师就在x∈(4,28)时段内安排核心内容,能使得学生学习效果最佳,故答案为:(4,28).【点睛】本题主要考查了待定系数求函数解析式及分段函数及不等式,属于基础题.16.设为向量的夹角,且,,则的取值范围是_____.【答案】【解析】【分析】将平方可得cosθ,利用对勾函数性质可得最小值,从而得解. 【详解】两个不共线的向量,的夹角为θ,且,可得:,可得cosθ.那么cosθ的取值范围:.故答案为:.【点睛】本题考查向量的数量积的应用,向量模的最值的求法,考查计算能力,属于中档题.三、解答题:解答应写出文字说明,证明过程或演算步骤.17.已知全集,若集合,.(1)若,求;(2)若, 求实数的取值范围.【答案】(1)(2)【解析】(1)利用集合的交集及补集的定义直接求解即可;(2)由可得,利用集合的包含关系求解即可.【详解】(1)当时,,所以,因为,所以;(2)由得,,所以【点睛】本题主要考查了集合的运算及包含关系求参,属于基础题.18.已知,,,为坐标原点.(1)若,求的值;(2)若,且,求 .【答案】(1)(2)【解析】【分析】(1)由向量平行的坐标运算列式直接求解即可;(2)先求得的坐标,利用坐标表示向量的模长,列方程求得,从而得,利用向量坐标表示数量积即可得解.【详解】(1)依题,,因为,所以,所以.(2)因为,所以,所以,因为,所以,所以,所以【点睛】本题主要考查了向量的坐标运算,包括共线、模长、数量积,属于基础题.19.已知.(1)求的值;(2)若且,求的值.【答案】(1)(2)【解析】【分析】(1)利用诱导公式化简求解,代入直接求解即可;(2)由条件可得,再平方得,结合角的范围可得,进而得和的值,从而得解. 【详解】(1)因为,所以(2)因为,所以,所以,两边平方,得,所以,,即,因为,所以,所以所以,结合,解得,……故【点睛】本题主要考查了同脚的三角函数的基本关系,对于sin+cos,sin cos,sin-cos这三个式子,利用(sin±cos)2=1±2sin cos,可以知一求二.属于中档题.20.已知函数(且)在上的最大值与最小值之差为.(Ⅰ)求实数的值;(Ⅱ)若,当时,解不等式.【解析】试题分析:(Ⅰ)结合指数函数的单调性由最值求参数即可;(Ⅱ)由(Ⅰ)知,为奇函数且在上是增函数,所以等价于,进而得,求解即可.试题解析:(Ⅰ)当时,,,则,解得当时,,,则,解得综上得:或(Ⅱ)当时,由(Ⅰ)知,为奇函数且在上是增函数∴或所以,不等式的解集为.点睛:本题主要考查了函数的图象与性质等知识点的综合应用,对于解函数不等式:首先根据函数的性质把不等式转化为的形式,然后根据函数的单调性去掉“”,转化为具体的不等式(组),此时要注意与的取值应在外层函数的定义域内,试题有一定的难度,属于中档试题.21.如图是函数的部分图像,是它与轴的两个不同交点,是之间的最高点且横坐标为,点是线段的中点.(1)求函数的解析式及上的单调增区间;(2)若时,函数的最小值为,求实数的值.【答案】(1)(2)【解析】【分析】(1)由点是线段的中点,可得和的坐标,从而得最值和周期,可得和,再代入顶点坐标可得,再利用整体换元可求单调区间;(2)令得到,讨论二次函数的对称轴与区间的位置关系求最值即可.【详解】(1)因为为中点,,所以,,则,,又因为,则所以,由又因为,则所以令又因为则单调递增区间为.(2)因为所以令,则对称轴为①当时,即时,;②当时,即时,(舍)③当时,即时,(舍)综上可得:.【点睛】本题主要考查了利用三角函数的图象求解三角函数的解析式及二次函数轴动区间定的最值问题,考查了学生的分类讨论思想及计算能力,属于中档题.22.已知().(1)当时,求关于的不等式的解集;(2)若f(x)是偶函数,求k的值;(3)在(2)条件下,设,若函数与的图象有公共点,求实数b的取值范围.【答案】(1)(2)1(3)【解析】【分析】(1)根据条件列指数不等式,直接求解即可;(2)利用偶函数定义列直接求解即可;(3)根据题意列方程,令,得到方程,构造,结合二次函数性质讨论方程的根即可.【详解】(1)因为所以原不等式的解集为(2)因为的定义域为且为偶函数,所以即所以. 经检验满足题意.(3)有(2)可得因为函数与的图象有公共点所以方程有根即有根令且()方程可化为(*)令恒过定点①当时,即时,(*)在上有根(舍);②当时,即时,(*)在上有根因为,则(*)方程在上必有一根故成立;③当时,(*)在上有根则有④当时,(*)在上有根则有综上可得:的取值范围为【点睛】本题重点考查了函数方程的求解及二次函数根的分布,用到了换元和分类讨论的思想,考查了学生的计算能力,属于难题.。

重庆市江津中学、合川中学等七校2018-2019学年高一上学期期末考试数学试题(解析版)

重庆市江津中学、合川中学等七校2018-2019学年高一上学期期末考试数学试题(解析版)

重庆市江津中学、合川中学等七校2018-2019学年高一上学期期末考试数学试题(解析版)一、选择题(本大题共12小题,共60.0分)1. 已知集合A ={x ∈N|−1≤x <3},B ={0,2,3,7},则A ∩B =( )A. {0,1,2}B. {0,2}C. {2}D. {1,2,3}【答案】B【解析】解:∵A ={x ∈N|−1≤x <3}={0,1,2}, ∴A ∩B ={0,1,2}∩{0,2,3,7}={0,2}. 故选:B .化简集合A ,然后直接利用交集运算得答案. 本题考查了交集及其运算,是基础题.2. 函数f(x)=1lgx−1的定义域为( )A. (0,+∞)B. (0,1)∪(1,+∞)C. (1,+∞)D. (0,10)∪(10,+∞)【答案】D【解析】解:要使函数有意义,则{lgx −1≠0x>0, 即{lgx ≠1x>0,∴{x ≠10x>0,即x >0且x ≠10. 故函数的定义域为(0,10)∪(10,+∞), 故选:D .根据对数函数的性质即可求函数的定义域.本题主要考查函数定义域的求法,利用分式函数和对数函数成立的条件是解决本题的关键.3. 已知角θ的终边经过点M(−√3,−1),则cosθ=( )A. 12B. −12C. √32D. −√32【答案】D【解析】解:角θ的终边经过点M(−√3,−1),则cosθ=√3√3+1=−√32, 故选:D .由题意利用任意角的三角函数的定义,求得cosθ的值. 本题主要考查任意角的三角函数的定义,属于基础题.4. 已知向量a ⃗ =(−2,1),b ⃗ =(3,m),若(2a ⃗ +b ⃗ )⊥b ⃗ ,则实数m 的值为( )A. 1或−3B. −3C. −1D. 1或3【答案】A【解析】解:2a ⃗ +b ⃗ =(−1,2+m);∵(2a ⃗ +b ⃗ )⊥b ⃗ ; ∴(2a ⃗ +b ⃗ )⋅b ⃗ =−3+(2+m)m =0; 解得m =1,或−3. 故选:A .可求出2a ⃗ +b ⃗ =(−1,2+m),根据(2a ⃗ +b ⃗ )⊥b ⃗ 即可得出(2a ⃗ +b ⃗ )⋅b ⃗ =0,进行数量积的坐标运算即可求出实数m 的值.考查向量垂直的充要条件,向量坐标的加法、数乘和数量积的运算.5. 下列函数中,既是偶函数又存在零点的是( )A. y =cosxB. y =sinxC. y =lnxD. y =x 2+1【答案】A【解析】解:对于A ,定义域为R ,并且cos(−x)=cosx ,是偶函数并且有无数个零点; 对于B ,sin(−x)=−sinx ,是奇函数,由无数个零点;对于C ,定义域为(0,+∞),所以是非奇非偶的函数,有一个零点; 对于D ,定义域为R ,为偶函数,没有零点; 故选:A .利用函数奇偶性的判断方法以及零点的判断方法对选项分别分析选择.本题考查了函数的奇偶性和零点的判断.①求函数的定义域;②如果定义域关于原点不对称,函数是非奇非偶的函数;如果关于原点对称,再判断f(−x)与f(x)的关系;相等是偶函数,相反是奇函数;函数的零点与函数图象与x 轴的交点以及与对应方程的解的个数是一致的.6. 如图,AB ⃗⃗⃗⃗⃗ =2CA ⃗⃗⃗⃗⃗ ,OA ⃗⃗⃗⃗⃗ =a ⃗ ,OB ⃗⃗⃗⃗⃗⃗ =b ⃗ ,OC ⃗⃗⃗⃗⃗=c ⃗ ,下列等式中成立的是( ) A. c ⃗ =32b ⃗ −12a ⃗ B. c ⃗ =32a ⃗ −12b ⃗ C.c ⃗ =2a ⃗ −b ⃗D. c ⃗ =2b ⃗ −a ⃗【答案】B【解析】解:∵AB ⃗⃗⃗⃗⃗ =2CA ⃗⃗⃗⃗⃗ ,OA ⃗⃗⃗⃗⃗ =a ⃗ ,OB ⃗⃗⃗⃗⃗⃗ =b ⃗ ,OC ⃗⃗⃗⃗⃗ =c ⃗ , 故OB⃗⃗⃗⃗⃗⃗ −OA ⃗⃗⃗⃗⃗ =2(OA ⃗⃗⃗⃗⃗ −OC ⃗⃗⃗⃗⃗ ), ∴OC ⃗⃗⃗⃗⃗ =32OA ⃗⃗⃗⃗⃗ −12OB ⃗⃗⃗⃗⃗⃗ ,即c ⃗ =32a ⃗ −12b ⃗ , 故选:B .由已知中AB ⃗⃗⃗⃗⃗ =2CA ⃗⃗⃗⃗⃗ ,结合向量减法的三角形法则,可得答案. 本题考查的知识点是平面向量的基本定理,难度中档.7. 根据表格中的数据可以判定方程lnx −x +2=0的一个根所在的区间为()A. (1,2)B. (2,3)C. (3,4)D. (4,5)【答案】C【解析】解:设f(x)=lnx −x +2=lnx −(x −2), 由表格数据得f(3)=ln3−(3−2)=1.099−1=0.099>0, f(4)=ln4−2=1.386−2<0, 则f(3)f(4)<0,即在区间(3,4)之间函数f(x)存在一个零点,即方程lnx −x +2=0的一个根所在的区间为(3,4), 故选:C .根据根的存在性定理进行判断即可.本题主要考查函数零点的判断,结合根的存在性定理是解决本题的关键.8. 将函数y =3sin(2x −π6)−1图象向左平移π4个单位,所得函数图象的一个对称中心是( )A. (π3,0)B. (−π6,0)C. (π12,−1)D. (π3,−1)【答案】D【解析】解:将函数y =3sin(2x −π6)−1的图象向左平移π4个单位长度, 可得y =3sin(2x +π2−π6)−1=3sin(2x +π3)−1的图象. 再令2x +π3=kπ,求得x =kπ2−π6,k ∈Z ,让k =1,得到所得图象的一个对称中心为(π3,−1),故选:D .利用函数y =Asin(ωx +φ)的图象变换规律,求得平移后的函数解析式,再利用正弦函数的图象的对称性得出结论.本题主要考查函数y =Asin(ωx +φ)的图象变换规律,正弦函数的图象的对称性,属于基础题.9. 设定义在R 上的函数f(x)满足f(x)+f(−x)=0,且f(x)=f(x −4),当x ∈[0,2)时,f(x)=3x −1,则f(3+log 32)=( )A. 12B. 13 C. −12 D. −13【答案】C【解析】解:∵定义在R 上的函数f(x)满足f(x)+f(−x)=0,且f(x)=f(x −4), ∴f(x)是R 上以逸待劳为周期的奇函数, ∵当x ∈[0,2)时,f(x)=3x −1, ∴当x ∈(−2,0]时,f(x)=−13x +1, ∴f(3+log 32)=f(log 32−1)=−13log 32−1+1=−123+1=−12.故选:C .推导出f(x)是R 上以逸待劳为周期的奇函数,从而当x ∈(−2,0]时,f(x)=−13x +1,进而f(3+log 32)=f(log 32−1)=−13log 32−1+1,由此能求出结果.本题考查函数值的求法,考查函数性质等基础知识,考查运算求解能力,是基础题.10. 已知函数f(x)=x 2−2|x|+2019.若a =f(−log 25),b =f(20.8),c =f(52),则a ,b ,c 的大小关系为( )A. a <b <cB. c <b <aC. b <a <cD. b <c <a【答案】C【解析】解:根据题意,f(x)=x 2−2|x|+2019={x 2+2x +2019,x <0x 2−2x+2019,x≥0, 则函数f(x)为偶函数, 则a =f(−log 25)=f(log 25),当x ≥0,f(x)=x 2−2x +2019=(x −1)2+2018,在(0,1)上为减函数,在(1,+∞)上为增函数; 又由1<20.8<2<log 25<52, 则有b <a <c ; 故选:C .根据题意,将f(x)的解析式写成分段函数的形式,分析可得f(x)为偶函数,同时可得在(0,1)上为减函数,在(1,+∞)上为增函数;据此分析可得答案.本题考查函数的奇偶性与单调性的判断以及性质的应用,注意分析函数f(x)的奇偶性与单调性.11. 若函数f(x)=ln(x 2−ax +1)在区间(2,+∞)上单调递增,则实数a 的取值范围是( )A. (−∞,4]B. (−∞,52)C. (−∞,52]D. (52,4]【答案】C【解析】解:设g(x)=x 2−ax +1,则要使f(x)=ln(x 2−ax +1)在区间(2,+∞)上单调递增,则满足{−−a 2=a2≤2g(2)=5−2a ≥0,即{a ≤4a ≤52,得a ≤52,即实数a 的取值范围是(−∞,52], 故选:C .根据复合函数单调性之间的关系进行求解即可.本题主要考查复合函数单调性的应用,结合二次函数的单调性是解决本题的关键.12. 已知f(x)={x 2−1,x ≥0−2x,x<0,方程f(x)+2√1−x 2+|f(x)−2√1−x 2|−2ax −4=0有三个实根x 1<x 2<x 3,若x 3−x 2=2(x 2−x 1),则实数a =( ) A. a =√17+32 B. a =√17−32C. a =−1D. a =1【答案】B【解析】解:由1−x 2≥0得x 2≤1, 则−1≤x ≤1,当x <0时,由f(x)=2√1−x 2, 即−2x =2√1−x 2.得1−x 2=x 2,即2x 2=1,x 2=12,则x =−√22,①当−1≤x ≤−√22时,有f(x)≥2√1−x 2,原方程可化为f(x)+2√1−x 2+f(x)−2√1−x 2−2ax −4=0,即−4x −2ax −4=0,得x =−2a+2,由−1≤−2a+2≤−√22解得:0≤a ≤2√2−2.②当−√22<x ≤1时,f(x)<2√1−x 2,原方程可化为4√1−x 2−2ax −4=0,化简得(a 2+4)x 2+4ax =0, 解得x =0,或x =−4aa 2+4,又0≤a ≤2√2−2,∴−√22<−4aa 2+4<0.∴x 1=−2a+2,x 2=−4aa 2+4,x 3=0. 由x 3−x 2=2(x 2−x 1),得4aa 2+4=2(4aa 2+4+2a+2), 解得a =−−3−√172(舍)或a =−3+√172.因此,所求实数a =−3+√172.故选:B .判断f(x)与2√1−x 2的大小,化简方程求出x 1、x 2、x 3的值,根据得x 3−x 2=2(x 2−x 1)得出a 的值. 本题主要考查函数与方程的应用,根据分段函数的表达式结合绝对值的应用,确定三个根x 1、x 2、x 3的值是解决本题的关键.综合性较强,难度较大.二、填空题(本大题共4小题,共20.0分)13. 若f(x)=(m −1)2x m 是幂函数且在(0,+∞)单调递增,则实数m =______. 【答案】2【解析】解:∵f(x)=(m −1)2x m 是幂函数且在(0,+∞)单调递增, ∴{m >0(m−1)2=1,解得实数m =2. 故答案为:2.利用幂函数的定义和性质直接求解.本题考查实数值的求法,考查幂函数性质等基础知识,考查运算求解能力,是基础题.14. 已知tanα=4,则sinα−2cosα3cosα+2sinα=______. 【答案】211【解析】解:原式=tanα−23+2tanα=4−23+2×4=211, 故答案为:211.根据同角的三角函数的关系即可求出.本题考查了同角的三角函数的关系,属于基础题.15. 学校某研究性学习小组在对学生上课注意力集中情况的调查研究中,发现其在40分钟的一节课中,注意力指数y 与听课时间x(单位:分钟)之间的关系满足如图所示的图象,当x ∈(0,12]时,图象是二次函数图象的一部分,其中顶点A(10,80),过点B(12,78);当x ∈[12,40]时,图象是线段BC ,其中C(40,50).根据专家研究,当注意力指数大于62时,学习效果最佳.要使得学生学习效果最佳,则教师安排核心内容的时间段为______.(写成区间形式) 【答案】(4,28)【解析】解:当x ∈(0,12]时, 设f(x)=a(x −10)2+80, 过点(12,78)代入得,a =−12 则f(x)=12(x −10)2+80, 当x ∈[12,40]时,设y =kx +b ,过点B(12,78)、C(40,50) 得 {b =90k=−1,即y =−x +90,(2)由题意得,{0<x ≤12−12(x +10)2+50>62或{−x +90>6212<x≤40得4<x ≤12或12<x <28, 所以4<x <28,则老师就在x ∈(4,28)时段内安排核心内容,能使得学生学习效果最佳, 故答案为:(4,28).当x ∈(0,12]时,设f(x)=a(x −10)2+80,把点(12,78)代入能求出解析式;当x ∈[12,40]时,设y =kx +b ,把点B(12,78)、C(40,50)代入能求出解析式,结合题设条件,列出不等式组,能求出老师就在什么时段内安排核心内容,能使得学生学习效果最佳本题考查解析式的求法,考查不等式组的解法,解题时要认真审题,注意待定系数法的合理运用.16. 设θ为向量a ⃗ ,b ⃗ 的夹角,且|a ⃗ +b ⃗ |=2|a ⃗ −b ⃗ |,|a ⃗ |=3,则cosθ的取值范围是______. 【答案】[35,1]【解析】解:∵θ为向量a ⃗ ,b ⃗ 的夹角,且|a ⃗ +b ⃗ |=2|a ⃗ −b ⃗ |,∴a ⃗ 2+b ⃗ 2+2a ⃗ ⋅b ⃗ =4(a ⃗ 2+b ⃗ 2−2a ⃗ ⋅b ⃗ ), 即3⋅a ⃗ 2+3b ⃗ 2−10a ⃗ ⋅b⃗ =0. ∵|a ⃗ |=3,∴27+3|b ⃗ |2−10×3×|b ⃗ |×cosθ=0,即cosθ=9+|b ⃗ |210|b ⃗|=910|b⃗ |+|b⃗ |10≥2√910|b⃗ |⋅|b⃗ |10=35,则cosθ的取值范围为[35,1], 故答案为:[35,1].由题意利用两个向量的数量积的定义可得3⋅a ⃗ 2+3b ⃗ 2−10a ⃗ ⋅b ⃗ =0.再根据|a⃗ |=3以及基本不等式,求得cosθ的最小值.再根据余弦函数的值域,求得cosθ的取值范围.本题主要考查两个向量的数量积的定义,基本不等式的应用,余弦函数的值域,属于中档题.三、解答题(本大题共6小题,共70.0分)17. 已知全集U =R ,若集合A ={x|−2<x <4},B ={x|x −m <0}.(1)若m =3,求A ∩(∁U B);(2)若A ∩B =A ,求实数m 的取值范围. 【答案】解:(1)当m =3时,B ={x|x <3}, 所以∁U B ={x|x ≥3}, 又集合A ={x|−2<x <4}, 故A ∩(∁U B)={x|3≤x <4}. (2)A ∩B =A ,得,A ⊆B , 故实数m 的取值范围是m ≥4.【解析】(1)由集合B 求出∁U B ,再求出集合A 与集合B 的补集的交集即可; (2)由集合A 是集合B 的子集,求出m 的取值范围.本题考查集合的交并补运算,以及由集合间的关系求参数的问题,属于基础题.18. 已知A(4,0),B(0,4),C(cosα,sinα),O 为坐标原点.(1)若OC ⃗⃗⃗⃗⃗ //AB ⃗⃗⃗⃗⃗ ,求tanα的值;(2)若|OA ⃗⃗⃗⃗⃗ +OC ⃗⃗⃗⃗⃗ |=√21,且α∈(0,π),求OB ⃗⃗⃗⃗⃗⃗ ⋅OC ⃗⃗⃗⃗⃗ . 【答案】解:(1)OC ⃗⃗⃗⃗⃗ =(cosα,sinα),AB ⃗⃗⃗⃗⃗ =(−4,4); ∵OC⃗⃗⃗⃗⃗ //AB ⃗⃗⃗⃗⃗ ; ∴4cosα+4sinα=0; ∴tanα=−1;(2)OA ⃗⃗⃗⃗⃗ +OC ⃗⃗⃗⃗⃗ =(4+cosα,sinα); ∴|OA ⃗⃗⃗⃗⃗ +OC ⃗⃗⃗⃗⃗ |=√(4+cosα)2+sin 2α=√17+8cosα=√21; ∴cosα=12; ∵α∈(0,π); ∴α=π3; ∴C(12,√32); ∴OB⃗⃗⃗⃗⃗⃗ =(0,4),OC ⃗⃗⃗⃗⃗ =(12,√32); ∴OB ⃗⃗⃗⃗⃗⃗ ⋅OC ⃗⃗⃗⃗⃗ =2√3.【解析】(1)可得出OC ⃗⃗⃗⃗⃗ =(cosα,sinα),AB ⃗⃗⃗⃗⃗ =(−4,4),根据OC ⃗⃗⃗⃗⃗ //AB ⃗⃗⃗⃗⃗ 即可得出4cosα+4sinα=0,从而求出tanα的值;(2)根据|OA ⃗⃗⃗⃗⃗ +OC ⃗⃗⃗⃗⃗ |=√21即可求出cosα=12,由α∈(0,π)即可求出α=π3,从而得出OB ⃗⃗⃗⃗⃗⃗ ,OC ⃗⃗⃗⃗⃗ 的坐标,进行数量积的坐标运算即可求出OB ⃗⃗⃗⃗⃗⃗ ⋅OC ⃗⃗⃗⃗⃗ 的值.考查根据点的坐标求向量坐标的方法,平行向量的坐标关系,根据向量坐标求向量长度的方法,以及向量数量积的坐标运算.19.已知f(α)=cos(π+α)cosαtan(π−α)tan(−α)cos(2π+α).(1)求f(π3)的值;(2)若α∈(0,π)且f(α)+f(π2−α)=−15,求sin2α−cosα的值.【答案】解:(1)已知f(α)=cos(π+α)cosαtan(π−α)tan(−α)cos(2π+α)=−cosα⋅cosα⋅(−tanα)−tanα⋅cosα=−cosα,故f(π3)=−cosπ3=−12.(2)∵α∈(0,π)且f(α)+f(π2−α)=−15,∴−cosα−cos(π2−α)=−15,即sinα+cosα=15①,平方可得2sinαcosα=−2425,∴α∈(π2,π),∴(sinα−cosα)2=1−2sinαcosα=4925,∴sinα−cosα=75②.由①②求得sinα=45,cosα=−35,∴sin2α−cosα=1625+35=3125.【解析】(1)利用诱导公式,化简f(α)的解析式,可得f(π3)的值.(2)由题意利用同角三角函数的基本关系求得sinα+cosα和sinα−cosα的值,可得sinα和cosα的值,从而求得sin2α−cosα的值.本题主要考查诱导公式,同角三角函数的基本关系,属于基础题.20.已知函数f(x)=a x(a>0且a≠1)在[−1,1]上的最大值与最小值之差为32.(Ⅰ)求实数a的值;(Ⅱ)若g(x)=f(x)−f(−x),当a>1时,解不等式g(x2+2x)+g(x−4)>0.【答案】解:(Ⅰ)当a>1时,f(x)max=a,f(x)min=1a ,则a−1a=32,解得a=2;当0<a<1时,f(x)max=1a ,f(x)min=a,则1a−a=32,解得a=12,综上得a=2或12;(Ⅱ)当a>1时,由(Ⅰ)知a=2,g(x)=2x−2−x为奇函数且在R上是增函数,∴g(x2+2x)+g(x−4)>0⇔g(x2+2x)>−g(x−4)=g(4−x)⇔x2+2x>4−x⇔x>1或x<−4,所以不等式g(x2+2x)+g(x−4)>0的解集为(−∞,−4)∪(1,+∞).【解析】(Ⅰ)讨论a>1,0<a<1,运用指数函数的单调性,解方程可得a的值;(Ⅱ)当a>1时,由(Ⅰ)知a=2,g(x)=2x−2−x为奇函数且在R上是增函数,化简所求函数式,解二次不等式即可得到解集.本题考查指数函数的单调性和运用,考查分类讨论思想方法和转化思想,以及不等式的解法,考查运算能力,属于中档题.21.如图是函数f(x)=Asin(ωx+φ)(A>0,ω>0,0<φ<π2)的部分图象,M、N是它与x轴的两个不同交点,D是M、N之间的最高点且横坐标为π4,点F(0,1)是线段DM的中点.(1)求函数f(x)的解析式及[π,2π]上的单调增区间;(2)若x∈[−π12,5π12]时,函数ℎ(x)=f2(x)−af(x)+1的最小值为12,求实数a的值.【答案】解:(1)取MN的中点为H,则DH⊥MN,因为F为DM的中点,且F在y轴上,则OF//DH且OF=12DH,则OM=OH,所以D(π4,2),M(−π4,0),则A=2,T=2πω=4[π4−(−π4)]=2π,所以ω=1所以f(x)=2sin(x+φ),由f(π4)=2,解得:φ=2kπ+π4,k∈z,由0<φ<π2,所以φ=π4,即f(x)=2sin(x+π4),令−π2+2kπ≤x+π4≤π2+2kπ,解得:−3π4+2kπ≤x≤π4+2kπ,又x∈[π,2π],所以函数f(x)在[π,2π]上的单调增区间为:[5π4,2π];(2)因为−π12≤x≤5π12,所以π6≤x+π4≤2π3,所以12≤sin(x+π4)≤1,所以1≤f(x)≤2,令t=f(x),则t∈[1,2],则g(t)=t2−at+1=(t−a2)2+1−a24,①当a2≤1,即a≤2时,g(t)min=g(1)=12,解得:a=32,②当1<a2<2,即2<a<4时,g(t)min=g(a2)=1−a24=12,解得:a=±√2(舍),③当a2≥2即a≥4时,g(t)min=g(2)=12,解得a=94(舍),综合①②③得:实数a的值为32.【解析】(1)结合三角函数的图象得:D(π4,2),M(−π4,0),则A=2,T=2πω=4[π4−(−π4)]=2π,所以ω=1所以f(x)=2sin(x+φ),由f(π4)=2,解得:φ=2kπ+π4,k∈z,由0<φ<π2,所以φ=π4,(2)由三角函数的值域得:12≤sin(x+π4)≤1,所以1≤f(x)≤2,由含参二次函数的值域问题,分情况讨论①当a2≤1,即a≤2时,g(t)min=g(1)=12,解得:a=32,②当1<a2<2,即2<a<4时,g(t)min=g(a2)=1−a24=12,解得:a=±√2(舍),③当a2≥2即a≥4时,g(t)min=g(2)=12,解得a=94(舍),综合可得解.本题考查了三角函数的图象及周期,三角函数的值域及含参二次函数的值域问题,属中档题.22.已知f(x)=log3(9x+1)−kx(k∈R).(1)当k=0时,求关于x的不等式f(x2)>1的解集;(2)若f(x)是偶函数,求k的值;(3)在(2)条件下,设g(x)=log3(b⋅3x−43b),若函数f(x)与g(x)的图象有公共点,求实数b的取值范围.第12页,共13页【答案】解:(1)当k =0时,f(x 2)=log 3(3x +1)>1得3x +1>3,即3x >2,得x >log 32, 所以原不等式的解集为{x|x >log 32}.(2)因为f(x)的定义域为R 且f(x)为偶函数,所以f(−1)=f(1)即log 3(9−1+1)+k =log 3(9+1)−k ,2k =log 310−log 3109=log 39=2, 所以k =1.(3)有(2)可得,f(x)=log 3(9x +1)−x ,因为函数f(x)与g(x)的图象有公共点,所以方程f(x)=g(x)有根,即log 3(9x +1)−x =log 3(b ⋅3x −43b)得log 39x +13x =log 3(b ⋅3x −43b)有根, 令t =3x >0,且b(t −43)>0,(b ≠0),方程可化为(b −1)t 2−43bt −1=0(∗)令ℎ(t)=(b −1)t 2−43bt −1恒过定点(0,−1),(43,−259),①当b −1=0时,即b =1时,(∗)在(43,+∞)上有根,则ℎ(t)=−43t −1=0,得t =−34∉(43,+∞),(舍);②当b −1>0时,即b >1时,(∗)在(43,+∞)上有根因为H(43)=−259<0,则(∗)方程在(43,+∞)上必有一根 故b >1成立; ……(10分)③当0<b <1时,(∗)在(43,+∞)上有根则有{0<b <12b 3(b−1)>43△≥0,⇒{0<b <1b >2(4b −3)(b +3)≥0,则b 无解……(11分) ④当b <0时,(∗)在(0,43)上有根则有{ b <0ℎ(0)=−1<0ℎ(43)<00<2b 3(b−1)<43△≥0,即{ b <0b∈Rb ∈R b <0且b <2(4b −3)(b +3)≥0,得到b ≤−3 综上可得:b 的取值范围为(−∞,−3]∪(1,+∞).【解析】(1)利用对数不等式的解法进行求解即可.(2)利用偶函数的定义利用f(−1)=f(1)解方程即可.(3)利用换元法,结合函数与方程之间的关系,转化为f(x)=g(x)有解进行讨论求解即可.本题主要考查函数与方程的应用,以及对数函数的性质,函数奇偶性的应用,利用换元法以及转化法是解决本题的关键,综合性较强,难度较大.。

2018-2019学年重庆市江津中学、合川中学等七校高一上学期入学摸底考试语文试题word版含解析

2018-2019学年重庆市江津中学、合川中学等七校高一上学期入学摸底考试语文试题word版含解析

2018-2019学年重庆市江津中学、合川中学等七校高一上学期入学摸底考试语 文注意事项:1.答题前,先将自己的姓名、准考证号填写在试题卷和答题卡上,并将准考证号条形码粘贴在答题卡上的指定位置。

2.选择题的作答:每小题选出答案后,用2B 铅笔把答题卡上对应题目的答案标号涂黑,写在试题卷、草稿纸和答题卡上的非答题区域均无效。

3.非选择题的作答:用签字笔直接答在答题卡上对应的答题区域内。

写在试题卷、草稿纸和答题卡上的非答题区域均无效。

4.考试结束后,请将本试题卷和答题卡一并上交。

第I 卷(选择题)一、选择题1.下列各句中加点的成语,使用正确的一项是( )A . 犯了错误就要接受批评,讳疾忌医....或者破罐子破摔都是不可取的。

B . 在2018年博鳌亚洲论坛年会上,嘉宾们就如何平衡政府与市场的关系达成了共识,那就是用好政府、市场“两只手”,让政府和市场各行其是....,相得益彰。

C . 2007年“嫦娥”奔月,2008年“神七”升空,2009年中俄开展火星联合探测,2012年“夸父计划”……中国太空探测计划正以前所未有的速度往前推进,真是大快人心....。

D . 双方代表经过几轮艰难谈判,一拍即合....,签署了合作协议。

2.下列句子组成语段顺序排列正确的一项是( )①“好书不厌百回读,熟读深思子自知”,这两句诗值得每个读书人悬为座右铭。

②与其读十部无关轻重的书,不如以读十部书的时间和精力去读一部真正值得读的书。

③少读如果彻底,必能养成深思熟虑的习惯,涵泳优游,以至于变化气质。

④读书并不在多,最重要的是选得精,读得彻底。

⑤读书原为自己受用,多读不能算是荣誉,少读也不能算是羞耻。

A . ①②⑤③④ B . ①②③⑤④ C . ④②①⑤③ D . ④②①③⑤3.作家沈从文曾经说过“美丽总让人忧愁”。

下列句子的意思与沈从文的感叹没有关联的一项是( )A . 世间好物不坚牢,琉璃易碎彩云散。

重庆市江津中学等七校2018-2019学年高一上学期入学摸底考试英语---精校Word版含答案

重庆市江津中学等七校2018-2019学年高一上学期入学摸底考试英语---精校Word版含答案

2018—2019学年度七校高2021级入学摸底考试英语试题本试卷分为第Ⅰ卷(客观题)和第Ⅱ卷(主观题)两部分。

满分150分,考试时间120分钟。

注意事项:1.答题前,务必将自己的姓名、准考证号等填写在答题卷规定的位置上。

2.答选择题时,必须使用2B铅笔将答题卷上对应题目的答案标号涂黑。

3.答非选择题时,必须使用0.5毫米黑色签字笔,将答案书写在答题卷规定的位置上。

4.考试结束后,将答题卷交回。

第I卷(共100分)I. 听力测试。

(共30分)第一节:情景反应。

(每小题1.5分,共9分)听一遍。

根据你所听到的句子,从A、B、C三个选项中选出最恰当的答语,并将答题卷上对应题目的答案标号涂黑。

Ⅱ. 单项选择(每小题1分,共20分)从A、B、C、D四个选项中选出可以填入空白处的最佳答案, 并将答题卷上对应题目的答案标号涂黑。

( ) 21. On ______ Children's Day,Jack received a prize for being ______ honest boy.A. the; anB. /; anC. /; aD. the; a ( ) 22. About ______ of the surface of the earth is covered with water.A. three fourthB. three fourthsC. third fourthD. third fours( ) 23. It’s to make others for you so long.A. polite; to waitB. impolite; waitC. impolite; waitingD. politely; waiting( ) 24. Either his parents his brother invited.A. or, wereB. or, wasC. nor, wereD. and, were ( ) 25. The big box on and I on it.A. is used to sitting; am used to sittingB. is used to sit; am used to sitC. is used to sitting; am used to sitD. is used to sit; am used to sitting( ) 26. Your new shirt feels so soft. I want to buy , too.A. oneB. itC. thatD. this( ) 27. Children to play computer games too long. It may have a bad influence ontheir eyes.A. shouldn’t allowB. should allowC. shouldn’t be allowedD. should be allowed( ) 28. The population in Japan not very large. But it is reported that about twenty-five percent of the population old people.A. is; isB. are; areC. is; areD. are; is( ) 29. They look so sad. There must be on TV.A. anything badB. bad somethingC. something badD. everything bad( ) 30. By the time I got to school, the first play for nearly half an hour.A. has begunB. has been onC. had begunD. had been on( ) 31. –I’m sorry, Mrs. Black. I my physics homework at home.–Don’t forget it to school tomorrow.A. left; to bringB. forgot; to takeC. lost; to bringD. left; to take( ) 32. I don’t remember ______ the book yesterday.A. where I putB. where did I putC. where will I putD. where I will put( ) 33. Though Eric is a boy, he writes _____ I do.A. careful asB. more carefully thanC. as careful asD.carefully than( ) 34. –I’m sorry. I took your raincoat by mistake yesterday.–Never mind. , your raincost is similar to mine.A. In allB. First of allC. After allD. Above all( ) 35. The young kids are very to see the movie “Monkey King”.A. excited; excitingB. excited; excitedC. exciting; excitedD. exciting; exciting( ) 36. At present, lots of people would rather in the country because there ispollution in the city.A. live; moreB. to live; lessC. live; lessD. to live; more( ) 37. a basketball fan, John is looking forward to the coming World Cup.A. As; watchB. For; watchC. As; watchingD. For; watching( ) 38. ______ riding shared bikes(共享单车)is an environmentally friendly way to travel,many of the bikes are thrown everywhere.A. AlthoughB. AsC. UnlessD. Until ( ) 39. —Mike, Could you tell me if Mary ______ to my party tomorrow?—I think she will if she _______ time.A. come; will haveB. comes; haveC. will come; hasD. will come; will have( ) 40. —Last month Frank went to Smart China Expo in Chongqing.—_______. And _______.A. So did he; so did IB. So he did; so I didC. So did he; so I didD. So he did; so did IⅢ. 完形填空(每小题1.5分,共15分)根据短文内容,从A、B、C、D四个选项中选出一个能正确填入相应空格的最佳答案, 并将答题卷上对应题目的答案标号涂黑。

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2018—2019学年度七校高2021级入学摸底考试英语试题命题学校:江津中学本试卷分为第Ⅰ卷(客观题)和第Ⅱ卷(主观题)两部分。

满分150分,考试时间120分钟。

注意事项:1.答题前,务必将自己的姓名、准考证号等填写在答题卷规定的位置上。

2.答选择题时,必须使用2B铅笔将答题卷上对应题目的答案标号涂黑。

3.答非选择题时,必须使用0.5毫米黑色签字笔,将答案书写在答题卷规定的位置上。

4.考试结束后,将答题卷交回。

第I卷(共100分)I. 听力测试。

(共30分)第一节:情景反应。

(每小题1.5分,共9分)听一遍。

根据你所听到的句子,从A、B、C三个选项中选出最恰当的答语,并将答题卷上对应题目的答案标号涂黑。

( ) 1. A. Russia. B. It’s great. C. 66 Chinese players.( ) 2. A. It’s a beautiful city. B. It’s cloudy. C. It’s clean.( ) 3. A. Sorry, I won’t. B. Yes, I will. C. Here you are. ( ) 4. A. Every two months. B. For one month. C. In a month. ( ) 5. A. OK, no problem. B. I’m busy now. C. You can do it by yourself.( ) 6. A. Me,too. B. I agree. C. Well done.第二节:对话理解。

(每小题1.5分,共9分)听一遍。

根据你所听到的对话和问题,从A、B、C三个选项中选出正确答案,并将答题卷上对应题目的答案标号涂黑。

( ) 7. A. At 7:00. B. At 7:30. C. At 8:00.( ) 8. A. Use mobile phones B. Eat lunch. C. Play games. ( ) 9. A. Stay Away From The World. B. Keep Away From The World.C. Stay Away From The Words.( ) 10. A. For 5 years. B. For 8 years. C. For 13 years. ( ) 11. A. Interesting. B. Not very interesting. C.Exciting.( ) 12. A. Being alone. B. Taking tests. C. Speaking in front of others.第三节:短文理解。

(每小题1.5分,共12分)听两遍。

根据你所听到的短文内容,从A、B、C三个选项中选出正确答案,并将答题卷上对应题目的答案标号涂黑。

A( ) 13. People kept dogs mainly for in the past.A. making moneyB.making them safeC. helping them work ( ) 14. A dog is a for a child.A. smart teacherB. helpful brotherC. playing partner ( ) 15. Young people treat a dog as .A. a friendB. a teacherC. a child( ) 16. Old people keep dogs because .A. dogs can play with themB. dogs are their friendsC. they treat dogs as their childrenB( ) 17. Jack was years old.A. 19B.9C.13( ) 18. Jack often went to school late because he often at nightA. studied lessonsB. read novelsC. watched sports games( ) 19. Jack's mother tried to make him .A. work harderB. read comicsC. go to bed earlier ( ) 20. Jack got a hundred in .A. mathB. EnglishC. math and EnglishⅡ. 单项选择(每小题1分,共20分)从A、B、C、D四个选项中选出可以填入空白处的最佳答案, 并将答题卷上对应题目的答案标号涂黑。

( ) 21. On ______ Children's Day,Jack received a prize for being ______ honest boy.A. the; anB. /; anC. /; aD. the;a( ) 22. About ______ of the surface of the earth is covered with water.A. three fourthB. three fourthsC. third fourthD. third fours( ) 23. It’s to make others for you so long.A. polite; to waitB. impolite; waitC. impolite; waitingD. politely; waiting( ) 24. Either his parents his brother invited.A. or, wereB. or, wasC. nor, wereD. and, were ( ) 25. The big box on and I on it.A. is used to sitting; am used to sittingB. is used to sit; am used to sitC. is used to sitting; am used to sitD. is used to sit; am used to sitting( ) 26. Your new shirt feels so soft. I want to buy , too.A. oneB. itC. thatD. this( ) 27. Children to play computer games too long. It may have a bad influence ontheir eyes.A. shouldn’t allowB. should allowC. shouldn’t be a llowedD. should be allowed( ) 28. The population in Japan not very large. But it is reported that about twenty-five percent of the population old people.A. is; isB. are; areC. is; areD. are; is( ) 29. They look so sad. There must be on TV.A. anything badB. bad somethingC. something badD. everything bad( ) 30. By the time I got to school, the first play for nearly half an hour.A. has begunB. has been onC. had begunD. had been on( ) 31. – I’m sorry, Mrs. Black. I my physics homework at home.–Don’t forget it to school tomorrow.A. left; to bringB. forgot; to takeC. lost; to bringD. left; to take( ) 32. I don’t remember ______ the book yesterday.A. where I putB. where did I putC. where will I putD. where I will put( ) 33. Though Eric is a boy, he writes _____ I do.A. careful asB. more carefully thanC. as careful asD. carefully than( ) 34. –I’m sorry. I took your raincoat by mistake yesterday.–Never mind. , your raincost is similar to mine.A. In allB. First of allC. After allD. Above all( ) 35. The young kids are very to see the movie “Monkey King”.A. excited; excitingB. excited; excitedC. exciting; excitedD. exciting; exciting( ) 36. At present, lots of people would rather in the country because there ispollution in the city.A. live; moreB. to live; lessC. live; lessD. to live; more( ) 37. a basketball fan, John is looking forward to the coming World Cup.A. As; watchB. For; watchC. As; watchingD. For; watching( ) 38. ______ riding shared bikes(共享单车)is an environmentally friendly way to travel,many of the bikes are thrown everywhere.A. AlthoughB. AsC. UnlessD. Until ( ) 39. —Mike, Could you tell me if Mary ______ to my party tomorrow?—I think she will if she _______ time.A. come; will haveB. comes; haveC. will come; hasD. will come; will have( ) 40. —Last month Frank went to Smart China Expo in Chongqing.—_______. And _______.A. So did he; so did IB. So he did; so I didC. So did he; so I didD. So he did; so did IⅢ. 完形填空(每小题1.5分,共15分)根据短文内容,从A、B、C、D四个选项中选出一个能正确填入相应空格的最佳答案, 并将答题卷上对应题目的答案标号涂黑。

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