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辽宁省大连市2019-2020学年高一上学期期中化学试卷一、单选题（本大题共30小题，共60.0分）1.当光束通过下列分散系时，不能产生丁达尔效应的是()A. 盐酸B. 稀豆浆C. Fe(OH)3胶体D. Al(OH)3胶体2.关于容量瓶的叙述：①是配制准确浓度溶液的仪器；②瓶上只标有容积；③不能用来加热；④使用之前要检查是否漏水；⑤只能用磨口玻璃塞；⑥不宜贮存溶液．这些叙述中正确的是()A. ①③④B. ①③④⑥C. ①②④D. ②③④⑥3.有关氧化还原反应本质的叙述中，正确的是()A. 化合价升高B. 失去电子或电子对偏离C. 电子的得失或电子对的偏向D. 化合价降低4.如图所示，若关闭阀门Ⅰ，打开阀门Ⅱ，让一种含氯气的气体经过甲瓶后，通入乙瓶，布条不褪色；若关闭阀门Ⅱ，打开阀门Ⅰ，再通入这种气体，布条褪色。
甲瓶中所盛的试剂可能是()①浓硫酸②饱和氯化钠溶液③亚硫酸钠溶液(有强还原性)④饱和碳酸氢钠溶液A. ①②③B. ②③④C. ①②④D. ①③④5.下列说法中，正确的是()A. 有机物都能燃烧生成二氧化碳和水，且受热不易分解B. 有机物大多数难溶于水而易溶于汽、四氯化碳等有机溶剂C. 有机物都是非电解质且熔点、沸点较低D. 有机化学反应都较复杂，且副反应多，反应速率慢6.下列物质中，属于非电解质的是()A. 金属铜B. 明矾C. 葡萄糖D. 醋酸7.用固体NaOH配制一定物质的量浓度的NaOH溶液，下列操作正确的是()A. 称量时，将固体NaOH直接放在天平左盘上B. 将称量好的固体NaOH放入容量瓶中，加蒸馏水溶解C. 定容时如果加水超过了刻度线，用胶头滴管直接吸出多余部分D. 将烧杯中溶解固体NaOH所得溶液，冷却到室温后转移至容量瓶中8.下列叙述中正确的是()A. 物质的量就是物质的数量B. 1mol CO的质量为28g·mol−1C. 阿伏加德罗常数等于6.02×1023D. 3.01×1023个SO2分子约是0.5mol9.1mol NaCl和1mol HCl含有相同的粒子数目A. ×B. √10.下列电离方程式书写正确的是()A. H2O⇌H++OH−B. H2S⇌2H++S2−C. NaHCO3⇌Na++H++CO32−D. Fe(OH)3=Fe3++3OH−11.下列各组内的离子，在溶液中不能大量共存的是()A. Mg2+K+NO3−Cl−B. K+Na+Mg2+SO42−C. H+SO42−Ba2+NO3−D. Ca2+H+NO3−Cl−12.将金属钠加入下列溶液中，溶液中既有气体又有白色沉淀生成的是()A. 稀硫酸B. 氯化铁溶液C. 硫酸镁溶液D. 碳酸钾溶液13.用N A表示阿伏加德罗常数的值，下列叙述正确的是()A. 常温下，0.5L1.0mol·L−1Na2SO4溶液中含有的氧原子数为2N AB. 标况下，11.2LH2O所含电子数为5N AC. 2.4g镁变为镁离子时失去的电子数为0.1N AD. 常温常压下，32g氧气和臭氧的混合物中所含氧原子总数为2N A14.配制一定物质的量浓度的KOH溶液时，导致浓度偏低的原因可能是()A. 容量瓶中原有少量的蒸馏水B. 移液时，不慎将液体流到瓶外C. 容量瓶盛过KOH溶液，使用前未洗涤D. 定容时俯视刻度线和液面15.下列物质所含的H原子数与0.5mol H2O所含H原子数相等的是()A. 0.6mol H2O2B. 标准状况下22.4L HClC. 98g H2SO4D. 3.01╳1023个NH316.如图所示是验证氯气性质的微型实验，a、b、d、e是浸有相关溶液的滤纸。
2021-2021学年辽宁省大连市高一〔上〕期中英语试卷一、阅读理解〔本大题共10 小题,共25.0分〕AIn America , when the eighth graders leave the middle school , they are often worried about moving to the high school ．It is a hard time for them, but it can be an exciting one as well．To make it easier, students need to get familiar with their school ．Even though they've done this already in the middle school , it's still important to find where their classrooms are．Most schools take students to the high school for a visit at the end of their eighth grade year. And , most schools also have a freshman 〔新生〕speech for parents and students before the first year begins ．Sometimes the main office will give away a map of the school．This can help students and parents to find different places in the school ．One way to know your high school more and make new friends is to join a club or play a sport．Schools often offer chances to join different clubs and sports ．Fall activities begin in August before the first day of school ．If you are not interested in sports, there are clubs for any interest, such as drama, dance, chess, photography, community service, etc．These clubs allow students from different grades ．By joining an activity , students can find new friendships, not to mention improving their chances in future college applications ．The school office will have a list of activities offered at the school and information on how to join them．What's more, to have a great start to a high school year, students can write down some of their worries , and ask for help from teachers and school workers ．1. According to the text , most students feel ______ when entering the high school ．A. excitedB. nervousC. lonelyD. disappointed2. Which of the following is TRUE about the school clubs ？ ______A. There are fewer students from higher grades in the school clubs ．B. The school clubs in high school only welcome sports fans ．C. Summer activities begin before school starts ．D. The school office can help new students join school clubs ．3. What is the purpose of this text ？______A. To tell the new students how to learn in high schoolB. To introduce new schoolsC. To give the teachers some adviceD. To give advice to new high school studentsBIf you're reading this , then you're probably studying English ．Maybe you speak a couple of other languages too．But what are the British like when it comes to learning languages ？According to a survey published by the European Commission , the British are officially the worst language learners in Europe-62 percent of them can't speak any other language apart from their own! While 38 percent of Britons speak at least one foreign language , only 18 percent speak two．However , the European Union data show that 56 percent speak at least one foreign language and 28 percent speak at least two．Moreover , 51 percent of EU citizens can have a conversation in English ．Learning a foreign language is not a popular choice at schools in Britain ；children startstudying a foreign language at the age of 11 and many give up completely at 14．So why don'tyoung people continue with languages at school ？Research suggests that students think that it is more difficult to get good grades in languages than in other subjects such as science orhistory ．The government is now looking for different ways to improve language learning ．One idea is to start much earlier and introduce foreign languages from the age of five ．Another plan is to give schoolchildren more choices and expand 〔增力口〕the range of languages taught to include Arabic , Mandarin and Urdu ．Mandarin is predicted to become the second most popular foreign language learned in UK schools．Gareth from Wales says, "I am learning Chinese and find it fun ．" Another student, Thomas from London , says, "Just saying that I learn Mandarin impresses people ．Even having a very basic level gives you an advantage ．" Brighton College headmaster Richard Cairns says, "One of my key tasks is to ensure that pupils are equipped for the realities of the 21st century ．One of those realities is that China has the fastest-growing economy in theworld ．"It may be a challenging task to change the Brits' attitude to learning languages but the government is determined to try ．4. What does the survey published by the European Commission indicate ？_____A. Britons aren't fond of speaking other languages ．B. Britons are the people who are excellent in languages ．C. More than half of EU citizens can only speak one language ．D. English is a second language to half of EU citizens ．5. Why don't British students pick up foreign languages ？______A. Because they don't want to make an effort ．B. Because they have too many subjects to learn．C. Because English is the most widely spoken language ．D. Because they feel other languages boring and useless．6. What does the passage mainly tell？______A. British students are poor in language learning ．B. British students are losing their advantages of learning languages ．C. There is no need for the British to learn other languages ．D. The British government is encouraging language learning ．CFamily fights are never pleasant ．Whether you are dealing with a loud sister or a stubborn mom or dad, the situation can be bad．At least that's what we have learned to expect ．What if it could be different ？What if family fights and conflicts could be turned into opportunities to become closer ？What if problems could be solved with everyone walking away feeling more deeply cared for and loved ？Family fighting is , on one level , about power ．Someone is telling someone else what to do. In a short moment, emotions 〔情绪〕can be brought out and the fight is on. You can go down that old road or you can try something different ．In any fight , you have a need to be listened to and understood．People raise their voices andshout at each other because they're not being listened to．It's totally unconscious ．You want your mom or dad to listen and understand ．But you always seem to forget the person you're fighting with has the same need to be listened to ．So if you can put aside your need for a few minutes, the situation will change quickly ．Give the other person some time to express his or her feelings , and you will earn your turn to be listened to ．And while you are listening , you have to listen for the right information . The best way to do this in emotional situations is to forget most of the words because many people can't express what they are feeling with words alone , especially when they are upset.But if the situation starts to get out of hand , it would be wise to just calm down and leave the problem until later because many fights happen at the wrong time . The situation will die down quickly , usually in less than 30 seconds. You can either move on to problem solving or reach an agreement to work on it at a better time .This way , everyone will feel respected and listened to , even when there is conflict . Emotions will be understood and respected , and it will bring your family closer together.7. From the first 3 paragraphs , we can conclude that .A. people had better avoid family fights .B. family members fight to control each otherC. family fights can be changed into something positiveD. when family members fight , it's worse as they know each other's weakness8. In the author's opinion , the key to dealing with family fights is toA. satisfy the need to be listened to firstB. make sure that you're the first to be listened toC. pay no attention to what others say in emotional situationsD. stop quarrelling when you feel you are giving orders9. When the situation gets out of control , it's best to .A. wait for a suitable moment to speakB. let the other person express their feelingsC. work on a written agreement firstD. move on to problem solving10. The main purpose of this article is toA. tell readers that family fights are not that badB. teach reader how to listen in family fightsC. remind readers to show respect in family fightsD. give advice on dealing with family fights二、阅读七选五(本大题共5小题,共10.0分)How can teenagers keep themselves from suffering from loneliness ? Here are some suggestions for speeding a recovery from loneliness .(1) A smile and a friendly greeting for the student behind you in line at the cafeteria (餐厅) won't make you best friends . But it will make you both feel good . It also can make it easier to interact the next time , and the time after that.Find a safe place to make connections. If going to the dancing party makes you feel like you just don't belong , try joining a special-interest group . ⑵Just because you feel left out in one group doesn't mean you'll feel like an outsider in every other one . Look for a group that allows you to feel comfortable gradually .Find other ways of making connections . Lonely people hunger for friendship . Sometimes feeling accepted and liked comes more easily when you do something for others rather than waiting for them to make you feel better . _(3)_Help a child in rending . Take notes for a disabled classmate. You might be surprised at the connections you make .(4) Loneliness is an absence of quality friendship , not of a particular quantity of friends . That's why it's important to know how to select a friend .You get what you expect, so expect the best If you expect others to be friendly , you will behave in proper ways that encourage people to be friendlier to you . ⑸_But starting the first step of positive expectations can make all the difference .A . Choose the right people .B . Loneliness won't last long .C. So consider becoming a volunteer.D . Reach out to others but start small.E. It can be hard work to be positive toward others .F. Maybe it's the drama club or the marching band .G . This harmful attitude can continue into adulthood .11. A. AEB. BC. CD. D E F. F G. G12. A. A B. B C. C D. D EE F.F G. G13. A. A B. B C. C D. D EE F.F G. G14. A. A B. B C. C D. D EE F.F G. G15. A. A B. B C. C D. D EE F.F G. G三、完形填空〔本大题共20小题,共30.0分〕One day, when I was in high school , I saw a kid named Kyle from my class walking home from school with all his books . I thought to myself , "(16)would anyone bring home all his books for the weekend ? He must really be (17)."As I was walking , I saw several kids running toward him . They ran at him, (18)all his books out of his arms and he fell down in the dirt . His glasses went (19)and landed in the grass. My (20) went out to him . So, I ran over to him . (21) I handed him his glasses, he looked at me and said, "Hey, thanks!"I helped him pick up his books , and asked him where he lived . As it (22) , he lived near me. We talked all the way home . Over the next four years, Kyle and I became best friends. Kyle was the (23) student of our class , one of those guys that really found (24) during high school. Therefore he had the honor to prepare a (25) speech On the graduation day, I could see that he was (26) So, I patted (拍) him on the back and said, "Hey, big guy , you'llbe (27) !" He looked at me and smiled .He cleared his throat, and began. "Graduation is a time to (28)those who helped you make it through those (29) years. Your parents, your teachers-- • but mostly your friends . I am here to tell all of you that being a friend to someone is the best (30)_you can give him ."I just looked at my friend with (31Xas he told the story of the first day we met . He had planned to(32)himself over the weekend and was carrying his books home , "Thankfully , nothing happened. My friend (33) me from doing the unspeakable (不能说出来的). "Not until that moment did I realize that you should never underestimate (低估)the (34)of your actions . With one small act you can (35) a person's life . For better or for worse .16. A. Where B. How C. When D. Why17. A. wonderful B. clever C. stupid D. anxious18. A. knocking B. catching C. taking D. throwing19. A. lost B. sending C. flying D. broken20. A. head B. heart C. hands D. thought21. A. While B. As C. Because D. Once22. A. passed B. went on C. turned out D. came up23. A. hardest B. top C. favorite D. luckiest24. A. friendship B. pleasure C. themselves D. it25. A. graduation B. school C. class D. college26. A. nervous B. excited C. proud D. crazy27. A. famous B. honored C. praised D. great28. A. thank B. remember C. reward D. congratulate29. A. happy B. exciting C. old D. difficult30. A. chance B. gift C. help D. favor31. A. wonder B. disbelief C. anxiety D. pride32. A. test B. enjoy C. kill D. hurt33. A. protected B. freed C. warned D. saved34. A. power B. use C. price D. meaning35. 四、A. destroy语法填空〔本大题共B. understand1小题,共15.0分)C. saveD. Change36 . It's a touching Christmas story, but not in the (1) ( tradition ) way. It's about a seriously ill 5-year-old boy (2) died in Santa's arms in Knoxville , Tennessee, in the United States. Eric Schmitt-Matzen , 60, a part-time Santa, received a call (3) a nurse at a hospital severalweeks ago, saying a dying 5-year-old boy wanted to see SantaClaus. Schmitt-Matzen dressed and rushed to the hospital Walking into the boy's room , he asked people (4) ( leave) if they couldn't hold back their (5) ( tear) . He picked up the boy and held him in his arms ."They say I'm going to die , " the boy told him (6) ( sad) . "What can I tell them when I get to where I'm going ?"Schmitt-Matzen said . "When you get there , you tell them you're Santa's Number One elf (小精灵), and they will let you in ."The boy asked, "They will ? " Then he (7) ( sit) up and gave Schmitt-Matzen a big hug and asked one more question "Santa, can you help me? " Schmitt-Matzen wrapped his arms around the boy. Before Schmitt-Matzen could say anything , the boy died right there. Santa let the boy stay, hugging and (8) ( hold) onto him .Schmitt-Matzen was (9) sad that he wanted to cry .The story was printed , and people were (10) ( move) when they read it.五、书面表达(本大题共2小题,共40.0分)37 .假定你是李华,你的朋友Tom由于和父母之间有一些分歧, 给你写了封求助信.他的烦恼有：1 .他周末想看电视,可是父母除了学习,什么都不让他做.2 .父母不理解,觉得他每门功课都应该是班上最好的,还经常看他的日记.3 .请你根据以上情况给他回信并提出建议(至少两条).注意：1 .短文应包括所提供的所有内容,也可以适当发挥.2 .词数：100词左右.Dear Tom,Yours, Li Hua38.阅读下面短文,根据所给情节进行续写, 使之构成一个完整的故事.Last Saturday, David was taking a walk in the park near his home when he noticed _ a woman with a boy of about eight years old . When David passed them, he heard the woman yell , "How stupid you are! You're good at nothing "David stopped and looked at the little boy . The boy said nothing . He just stood there, looking upset.David was reminded of his English teacher Mrs Brown in middle school . After he e ntered middle school, David lacked self-confidence because he was often made fun of by others. He was often told that he was good at nothing , which David believed . B ut one day it all changed .One day, in an English writing class , Mrs Brown asked them to read a novel . Th ey were asked to write a new chapter of the novel after they finished reading the book . A few days later, David handed in his story . He didn't give it much thought . But th e next day to his surprise, the comment "well done" from Mrs Brown came into view t he moment he turned to the page where the story was written .When David read that, he almost burst into tears. He never expected to be praised one day. He suddenly gained some self-confidence .That day after he returned home , he wrote a short story and gave it to Mrs Brown th e next morning . And again he was praised .David became very interested in writing . He often wrote short stories and asked Mrs Brown to read them and correct them for him . Mrs Brown always correct them for hi m. Mrs Brown always corrected the mistakes he had made and gave him good advice t o improve them .One year later, David joined the school newspaper and became an e ditor of it . He was no longer that boy who lacked self-confidence . He gained his conf idence and was hopeful about his future .He succeeded in entering college and kept writing . Several years after graduating fro m college, he had his first book published . With some more books coming out , he became famous as a writer in his country . And he owed his success to Mrs Brown's en couragement.Without her encouragement, his life might be very different now 注意：1 .所续写短文的词数应为150左右；2 .至少使用5个短文中标有下划线的关键词语3 .续写局部分为两段,每段的开头语已为你写好；4 .续写完成后,请用下划线标出你所使用的关键词语.Paragraph 1：Inspired by his own life story , David decided to do something for that boy . Paragraph 2：The mother was ashamed when she heard that.1 .【答案】 【小题 1】 B【解析】1. B.细节理解题.由第一段中 "they are often worried about moving to the highschool" 可知在升入高中前大多数学生都感到紧张担忧．最后一段也有提示．应选 B ．2 ． D ． 理解判断题．细读第三段,由末 句 The school office will have a list of activities offeredat the school and information on how to join them ． 可知, 学校办公室将提供学校提供的活动清单以及有关如何参加这些活动的信息．故 D 项正确．应选 D ．3 ． D ． 主旨归纳题．根据整篇文章内容及其最后一段句子 What's more , to have a great start to a high school year , students can write down some of their worries , and ask for help fromteachers and school workers.更重要的是,在高中时有个良好的开端,学生可以写一些他们的忧虑,并向教师和学校工作人员寻求帮助．文章主要是给建议新高中学生．应选D ．短文讲了在美国,当第八年级的学生离开中学时,他们经常担忧搬到高中,这对他们来说是一段艰难的时期, 但同时也是一个令人兴奋的时刻． 高中结交新朋友是参加一个俱乐部或参加体育运动．学校经常提供时机参加各种俱乐部和体育活动．更重要的是,学生可以写一些他们的忧虑,并向教师和学校工作人员寻求帮助．此题主要考查学生的细节理解和推理判断水平． 做细节理解题时一定要找到文章中的原句,和题干进行比拟,再做出正确选择．在做推理判断题时不要以个人的主观想象代替文章的事实,要根据文章事实进行符合逻辑的推理判断．4 .【答案】【小题 1】 A 【小题 2】 A 【小题 3】 D【解析】1. A.细节理解题.根据第二段 According to a survey published by the EuropeanCommission , the British are officially the worst language learners in Europe-62 percent of themcan't speak any other language apart from their own! While 38 percent of Britons speak at leastone foreign language , only 18 percent speak two ． 根据欧盟委员会发布的一项调查,英国人是欧洲学习成绩最差的语言学习者, 其中 62%的人只能说自己的母语,而且不会 说其他任何语言！尽管 38%的英国人至少会说一种外语,但只有 18%的人会讲两种外 语．可知,欧盟委员会发布的调查说明英国人不喜欢说其他语言．应选A ． 2． A ． 细节理解题． 根据第四段 Research suggests that studentsthink that it is more difficultto get good grades in languages than in other subjects such as science or history ．研究说明,学生认为,要获得良好的语言成绩要比在科学或历史等其他学科上要难得多．可知,英国学生不选择外语是由于他们不想努力．应选 A ．3． D.主旨大意题.阅读全文,根据文章内容可知,本文主要讲述了英国政府正在鼓励语言学习．应选 D ．本文是一篇社会文化类阅读,主要讲述了英国政府正在鼓励语言学习．此题主要考查学生的细节理解和推理判断水平． 做细节理解题时一定要找到文章中的原句,和题干进行比拟,再做出正确选择．在做推理判断题时不要以个人的主观想象代替文章的事实,要根据文章事实进行符合逻辑的推理判断．7.【答案】答案和解析2】 D 3】 D【小题1】C 【小题2】A 【小题3】A 【小题4】D【解析】1-4 CAAD1. C.细节理解题.根据第二段What if it could be different ？What if family fights and conflicts could be turned into opport unities to become closer？What if problems could be solved with everyone walking away fe eling more deeply cared for and loved ？如果它能有所不同呢？如果家庭的争吵和冲突能转变成亲近的时机呢？如果问题能在每个人离开的时候都能感受到更多的关心和爱呢？知,家庭争吵可以变成积极的东西．应选C．2. A.细节理解题.根据第四段In any fight , you have a need to be listened to and understood, 在任何战斗中,你者B需要被倾听和理解．可知,作者认为,处理家庭矛盾的关键是首先要满足倾听的需要．应选A．3. A.细节理解题.根据倒数第二段But if the situation starts to get out of hand , it would be wise to just calm down and leave th e problem until later because many fights happen at the wrong time ．The situation will die d own quickly , usually in less than 30seconds．You can either move on to problem solving or reach an agreement to work on it at a better time 但如果情况开始失控, 你最好冷静下来,把问题留到以后解决,由于很多争吵都是在错误的时间发生的．这种情况会很快消失,通常不到30 秒．你要么继续解决问题, 要么在一个更好的时间达成一致解决它, 可知, 当情况失控时,最好等待适当的时机再说话．应选A．4. D.主旨大意题.阅读全文,根据文章内容可知,本文主要为我们提供了处理家庭矛盾的建议．应选 D ．本文是一篇人生感悟类阅读,属于说明文,主要为我们提供了处理家庭矛盾的建议．考查学生的细节理解和推理判断水平．做细节理解题时一定要找到文章中的原句, 和题干进行比拟, 再做出正确选择．在做推理判断题时不要以个人的主观想象代替文章的事实,要根据文章事实进行符合逻辑的推理判断．11.【答案】【小题1】D 【小题2】F 【小题3】C 【小题4】A 【小题5】E【解析】DFCAE1. ．D ．段落理解题．根据下文的句子 A smile and a friendly greeting for the student behind you in line at the cafeteria won't make you best friends ．可知给排在你身后的学生一个微笑和友好的问候不会让你们成为最好的朋友. D项：Reach out to others but start small.向别人伸出援助之手,但要从小事做起．符合文意,应选D．2. F.联系上文题.根据上文的句子"try joining a special-interest group ."〔参加一个兴趣小组〕,可知这里是：Maybe it's the drama club or the marching band ．也许是戏剧俱乐部或游行乐队．符合文意,应选F．3. C.归纳总结题.根据上文的句子"Sometimes feeling accepted and liked comes more easily when you do something for others rather than waiting for them to make you feel better ．"〔当你为别人做事的时候感觉被接受或被喜欢就更容易〕.可知这里是：So consider becoming a volunteer.考虑做一个志愿者．应选C．4. A.小标题选择.根据下文的句子"Loneliness is an absence of quality friendship , not of a particular quantity of friends ．"〔孤单是缺少有质量的友谊不是缺少大量的朋友〕．可知这里是：C hoose the right people．选择适当的人．应选 A ．5. E.联系下文题.根据下文的句子 "But starting the first step of positive expectations can make all the difference ． "〔但是,开 始积极期望的第一步可以使所有的不同〕．可知这里是： It can be hard work to be positive toward others ．积极对待他人可能很难．应选E ． 本文主要介绍了青少年特别容易遭受孤独感,文章给出了一些建议：1、向别人伸出援 助之手,但要从小事做起；2、找到一个建立接触的平安地方；3、寻找一个能让你逐渐 放松的小组；4、选择适当的人．做题前一定要略读全文,把握文章要表达的主题,注意前后句与句,段落与段落之间的关系．做题中,一定要认真分析,注意选项与上下文的关系,与前后单词的关系．对于一时没有太大的把握的题可以放到最后再来完成, 由于有时答案可以从下文内容表达出 来．答完后再通读一遍文章,看看所选选项能不能是语句通顺,语意连贯．【解析】 1-5 DCACB 6-10 BCBCA 11-15 ADADB 16-20 BCDAD 1. ． D ． 考查疑问代词及语境理解． A Why 为什么； How 如何； When 什么时候； Where 在哪里．周末是休息的时间,作者想为什么有人竟把所有的书都带回家．应选D ． 2. C ． 考查形容词及语境理解． stupid 愚蠢的； clever 聪明的； wonderful 棒的； anxious 焦急的．联系上文,把所有的书都带回家度周末,作者推测,这人一定很蠢．应选 C ．3. A.考查动词及语境理解.throwing 扔；catching 抓住；taking 带走； knocking 撞击.根据上文ran at him,可知小孩冲撞过来把他的书从手臂上撞掉了.应选 A. 4. C.考查动词及语境理解.lost 丧失；sending 寄；broken 打碎；flying 飞.根 据语境,他摔倒在地,眼镜被撞飞出去再摔在地上．应选 C ． 5. B.考查名词及语境理解.heart 心；head 头；hands 手；thought 想法.看到同 学摔倒,作者一心想去帮助．应选B ． 6. B.考查连词及语境理解.While 当……时候； As 由于；随着；Because 由于；Once 一旦.根据上下文,应填时间连词 as,表示"当……时候"；while 指时间段,不能和瞬 间动词hand 连用.应选 B.7. C.考查动词及语境理解.passed 通过；turned out 结果是； went on 继续；came up 提出．根据题意,结果发现他们住得很近．应选 C ． 8. B .考查形容词及语境理解.top 最高的；头等的； hardest 最难的；favorite 最爱 的； luckiest 最幸运的．从下文中Therefore he had the honor to prepare 可推断他是班上 的尖子生．应选 B ．9. C.考查名词及语境理解. friendship 友谊；pleasure 快乐；themsekes 他们自己；it它．根据语境, Kyle 在高中时就是找到了自我的一个人．应选 C ．10. A .考查名词及语境理解. class 班级；school 学校；graduation 毕业典礼； college大学．从下一段 Graduation is a time 可以看出是准备毕业演讲．应选 A ．11. . A .考查形容词及语境理解. nervous 紧张的；excited 冲动的；proud 骄傲的；crazy 疯狂的．从下文我拍拍他的后背,说些鼓励的话可推断他在演讲之前很紧张,应选A ． 12. D.考查形容词及语境理解. famous 知名的；great 伟大的；好的； praised 被称赞的； honored 荣耀的．从上下文可知是鼓励的话语"你很棒 ",应选 D ． 13. ． A ． 考查动词及语境理解． reward 奖励； remember 记住； thank 感谢； congratulate 恭喜． 从上下文可知, Kyle 在毕业演讲时感谢那些曾帮助他度过艰难时光的人． 应选 A ．14. D ． 考查形容词及语境理解． happy 快乐的； exciting 冲动的； old 老的； difficult 困难的．结合上文,帮助他应该是度过"艰难时光 ",应选 D ． 15. B.考查名词及语境理解. chance 时机；gift 礼物；help 帮助；favor 赞同.成16.【答案】【小题 1】 D【小题 6】 B【小题 11】 A【小题 16】 B2】 C 7】 C 12】 D 17】 3】 A 8】 B 13】 A 18】 4】 C 9】 C 14】 D 19】 A 5】 B 10】 A 15】 B为一个人的好朋友就是你给这个人的最好的礼物．应选B．16. ．B ．考查名词及语境理解．wonder 惊奇；anxiety 焦虑；disbelief 不信；pride骄傲．从下文得知Kyle 那天原本打算把书全带回去然后自杀, 所以我不相信这是事实．故选B．17. C.考查动词及语境理解. test测试；enjoy喜欢；kill杀死；hurt伤害.Kyle那天原本打算把书全带回去然后自杀,应选C．18. D.考查动词及语境理解. protected保护；freed解放；warned警告；saved拯救．我挽救了他的性命．应选D．19. A.考查名词及语境理解. price价格；use用途；power力量；meaning意义.通过上文表达的事情,我得到启示：不要低估了你的一个小小行为的力量．应选A．20. D.考查动词及语境理解. destroy破坏；change改变；save拯救；understand明白．句意,一个小小的手势可以改变一个人的一生．应选 D ．这是一篇记叙文．本文讲述我在放学回家路上,偶然看到Kyle 被撞倒而帮他捡起书和眼镜,从而成为好朋友,毕业典礼Kyle 演讲的时候我才知道就是我当时的一个小小的举动,挽救了Kyle 的性命而且鼓励着他成为出色的人．从而得出启示：不要低估了你的一个小的举动的力量,有时可以改变一个人的一生．近几年高测试题中的完形填空有新的变化, 试题所涉及的知识面不断拓宽, 综合难度不断提升．做完型填空首先要通读全文,了解大意．一篇完形填空的文章有许多空格,所以,必须先通读一至两遍,才能大概了解文章的内容．千万不要看一句,做一句．其次要逐句分析,前后一致．选择答案时,要考虑整个句子的内容,包括搭配、时态、语法等．答案全填完后,再通读一遍文章,检查是否通顺流畅了,用词得当,意思正确．36.【答案】【小题1】traditional【小题2】who/ that【小题3】from【小题4】to leave【小题5】tears【小题6】sadly【小题7】sat【小题8】holding【小题9】so【小题10】moved【解析】 ( 1 ) traditional ．考查派生词．修饰名词way, 表示"传统的", 用形容词traditional ．( 2) who/ that．考查定语从句．修饰先行词 a seriously ill 5-year-old boy , 做定语从句diedin Santa's arms in Knoxville , Tennessee, in the United States的主语,用关系词who/that.(3) from .考查介词.表示"来自",修饰名词a nurse,用介词from .(4) to leave.考查动词不定式.根据ask sb to do sth,可知用动词不定式to leave.(5) tears.考查名词.表示眼泪,和people照应,用名词复数tears.(6) sadly.考查副词.修饰动词told him ,用副词sadly.(7) sal:.考查时态.根据上下文可知谓语动词用过去式sat.(8) 8) holding ．考查非谓语动词,做伴随状语,和现在分词hugging 并列,用现在分词holding ．(9) so.考查固定句式.修饰形容词sad,和结果状语从句that he wanted to cry照应,用so.(10) moved.考查派生词.做people were的表语,表示"感动的",用形容词moved.这是一个感人的圣诞故事, 但不是传统的故事, 而是一个5岁的男孩死于美国田纳西州诺克斯维尔的圣诞老人怀里.语法填空是通过语篇在语境中考查语法知识的运用水平, 在解题前应快速浏览短文掌握大意,在读懂短文的根底上,结合短文提供的特定的语言环境去逐句分析.要解决好语法填空,离不开坚实的语法知识, 有了坚实的语法知识才能对语言进行正确的分析和判断,从而答对题目37 .【答案】Dear Tom,I know you felt unhappy recently , for you disagreed with your parents about what you should do or what your shouldn't do .You do well in Maths and Chinese , while you find English and physics difficult to learn .【高分句型一］You are under great pressure from studies. However, your parents don't understand you and insist that you should be the best at every subject in your class.〔他周末想看电视,可是父母除了学习,什么都不让他做〕What's more , they often read your diaries. Besides, you feels like watching TV at weekends , but your parents allow you to do nothing but study . Worst of all , you're so annoyed that you show no interest in your study at all.〔父母不理解,觉得他每门功课都应该是班上最好的,还经常看他的日记."I think , first of all , you should communicate with your parents , telling them your trouble .【高分句型二】And you should cheer up as soon as possible working hard to quality himself for a job in the future . Additionally , you'd better turn to your teachers for advice and make a plan on how to improve your English and physics . 〔建议〕Yours , Li Hua【解析】高分句型一：You do well in Maths and Chinese , while you find English and physics difficult to learn .译文：你的数学和语文学得很好,而英语和物理却很难学.分析：while表示比照.高分句型二：I think , first of all, you should communicate with your parents , tellingthem your trouble .译文：我认为,首先,你应该和你的父母沟通,告诉他们你的麻烦.分析：现在分词作伴随状语.这是一篇提纲类作文,我们需要用正确的英语把给出的要点表达出来.动笔前,一定要认真分析要点,理解要点要表达的含义,不能遗漏要点,跑题偏题.本作文中给出的要点比拟具体,故需要准确表达.写作时注意准确运用时态,上下文意思连贯,符合逻辑关系,尽量使用自己熟悉的单词句式, 同时也要注意使用高级词汇和高级句型使文章显得更有档次.特别注意在选择句式时要赋予变化.平时除了增强词汇积累,写作联系以外,还可以适当记忆一些类似的范文,这样在测试中可以起到事半功倍的效果.38 .【答案】Paragraph 1：Inspired by his own life story , David decided to do something for that boy . He went to the woman , who immediately recognized him because she had read his books and seen his pi ctures.【高分句型一】David started to chat with her . He told her that what she said to her boy was not appr opriate . Then he told her about the encouragement he once got from Mrs Brown . In the en d, he said, "I couldn't have become a writer if I had believed I was good at nothing "〔作者决定帮助谁？2,如何以自己的故事说服小男孩的妈妈？〕Paragraph 2：The mother was ashamed when she heard that. She realized that she shouldn't have called h er son stupid, which would make his lose confidence in himself . So she said, "Thank you for your advice. I'll never say such things to him again . Instead , I'll find out what he's good at and encourage him. " The woman then left with the boy . Looking at the back of the boy , David felt。
2019-2020学年第一学期高一期中考试高一物理试卷（时间：90分钟 总分：100分）注意事项：1． 答第Ⅰ卷前，考生务必将自己的姓名、姓名代码、考号、考试科目用2B 铅笔涂写在答题卡上。
2． 每小题选出答案后，用铅笔把答题卡上对应题目的答案标号涂黑。
如需改动，用橡皮擦干净后，再选涂其他答案。
不能答在试题卷上。
第Ⅰ卷一、 选择题(本题共12小题，每小题4分，共48分。
1-8题只有一个正确选项，9-12题有两个或两个以上选项正确，漏选得2分，错选不得分） 1．下列说法中正确的是( )A. 只要两物体之间有弹力，两物体就一定接触B. 物体加速度越大，速度增加的就越快C. 弹簧上弹力的大小与弹簧的长度成正比D. 平均速度的大小叫平均速率2．小球从距地面5m 高处落下，被地面反向弹回后，在距地面2m 高处被接住，则小球从高处落下到被接住这一过程中通过的路程和位移大小分别为（ ） A ．7m,7m B ．5m,2m C ．5m,3m D ．7m,3m3．如图甲乙丙丁是以时间为横轴的匀变速直线运动图象，下列说法正确的是( )A．甲是a ——t 图象B ．乙是x ——t 图象C ．丙是a ——t 图象D ．丁是v ——t 图象4．如图所示，光滑斜面上的四段距离相等，质点从O 点由静止开始下滑，做匀加速直线运动，先后通过a 、b 、c 、d…，下列说法正确的是( )A ．质点由O 到达各点的时间之比a t ：b t ：c t ：d t ＝1：2：3：4B ．质点通过各点的速率之比a v ：b v ：c v ：d v ＝1：2：3：4C ．在斜面上od 间运动的平均速度v ＝ b vD ．在斜面上od 间运动的平均速度v ＝a v5．甲、乙两车在平直公路上行驶，其v -t 图象如图所示，对图象解读正确的是（ ）A ．4s 末，甲、乙两车相遇B ．在0~8s 内，甲车的加速度先变小后变大C ．甲车在0~4 s 内的位移大于乙车在4-8s 内的位移D ．在4~8 s 内，甲车的平均速度大于30m/s6．汽车以20m/s 的速度在平直公路上行驶，急刹车时的加速度大小为52/s m ，则自驾驶员急踩刹车开始，2s 内与5s 内汽车的位移之比为（ ） A. 5∶4 B. 4∶5 C.3∶4 D.4∶37．如图所示,光滑半球形容器固定在水平面上,O 为球心,一质量为m 的小滑块,在水平力F 的作用下静止P 点｡设滑块所受支持力为N F ，OP 与水平方向的夹角为θ｡下列关系正确的是( )A ．tan mgF θ=B.tan F mg θ= C ．tan N mgF θ= D.tan N F mg θ=8．如图所示，斜面体P 放在水平面上，物体Q 放在斜面上．Q 受一水平作用力F ，Q 和P 都静止．这时P 对Q 的静摩擦力和水平面对P 的静摩擦力分别为f 1、f 2．现使力F 变大，系统仍静止，则 （ ）A ． f 1、f 2都变大B ． f 1变大，f 2不一定变大C ． f 2变大，f 1不一定变大D ． f 1、f 2都不一定变大多选题9．如图所示，一木板B 放在粗糙的水平地面上，木板A 放在B 的上面，A 的右端通过轻质弹簧秤固定在直立的墙壁上，用F 向右拉动B ，使它以速度v 运动，这时弹簧秤示数为T ，下面的说法中正确的是（ ）A ．木块A 给木板B 的滑动摩擦力的大小等于T B ．木块A 给木板B 的滑动摩擦力的大小等于FC ．若木板以2v 的速度运动，木块A 受到的摩擦力的大小等于TD ．若2F 的力作用在木板上，木块A 受到的摩擦力的大小等于2T 10．以下受力分析正确的是：（ ）A ．物块A 沿着粗糙墙面向上运动时受到的摩擦力方向向下B ．光滑的小球B 受到的外力作用有三个C ．静止的物块C 受到的外力作用有四个D ．静止的物块D 给斜面的作用力有两个11．如图中a 、b 、c 为三个物块，M 、N 为两个轻质弹簧，R 为跨过光滑定滑轮的轻绳，它们连接如图所示并处于平衡状态（ ）A ． 有可能N 处于拉伸状态而M 处于压缩状态B ． 有可能N 处于压缩状态而M 处于拉伸状态C ． 有可能N 处于不伸不缩状态而M 处于拉伸状态D ． 有可能N 处于拉伸状态而M 处于不伸不缩状态12．如图所示，一小球放置在木板与竖直墙面之间，设墙面对球的压力大小为1N ，球对木板的压力大小为2N ，以木板与墙连接点所形成的水平直线为轴，将木板从图示位置开始缓慢地转到水平位置．不计摩擦，在此过程中（ ）A ．1N 先增大后减小B ．1N 始终减小C ．2N 始终减小D ．2N 先减小后增大第Ⅱ卷二．实验题(共2小题，共12分。
辽宁省大连市2019-2020学年高一上学期期中考试地理试题（含答案解析）高考真题高考模拟高中联考期中试卷期末考试月考试卷学业水平同步练习辽宁省大连市2019-2020学年高一上学期期中考试地理试题（含答案解析）1 2017年10月4日中秋夜20点左右,一道火光划过云南香格里拉县城西北40千米处的德钦县上空,后经证实,这是一枚自太空坠落的“火流星”。
据此完成下列各题。
1. 自太空坠落的“火流星”一般多属于A. 巨行星B. 星云C. 恒星D. 小行星2. 在下列天体中,“火流星”现象不可能发生的是A. 金星B. 月球C. 火星D. 土星【答案解析】 1. D 2. B1.“火流星”是小行星进入地球大气层后，与地球大气摩擦燃烧形成的，故D正确；巨行星和星云体积大，恒星位置相对稳定，ABC错误。
故选D。
2.“火流星”是小行星进入地球大气层后，与地球大气摩擦燃烧形成的，月球上没有大气不可能发生“火流星”现象，故B正确，ACD错误。
故选B。
2 2016年6月19日，美国国家科学院预言：在2020年的某一天，美国南部的一些城市，在五彩斑斓的极光光幕过后，电网会突然变得闪烁不定，灯光在瞬时明亮后将会停电，一分半钟之后，这个大停电现象将会遍及美国整个东部地区，甚至整个欧洲以及中国、日本等区域也会同样经历这样的灾难，而这场灾难仅仅源于太阳打了一个强烈的“喷嚏”。
据此回答下列各题。
3. 材料中所述强烈的“喷嚏”极有可能是( )A. 太阳耀斑爆发B. 太阳爆炸C. 太阳辐射增强D. 太阳辐射减弱4. 该“喷嚏”还可能产生的明显影响不包括( )A. 短波通信中断B. 信鸽丢失C. 指南针失灵D. 地球各地出现极光【答案解析】 3. A 4. D3.在2014年的某一天，美国南部的一些城市，在五彩斑斓的极光光幕过后，电网会突然变得闪烁不定，灯光在瞬时明亮后将会停电，结合太阳活动对地球的影响相关知识进行分析，太阳活动使极地附近产生极光现象；太阳活动使无线电短波产生中断，导致电网会突然变得闪烁不定。
大连市部分重点高中2019-2020学年度上学期高一期中考试数学试卷考试时间： 试卷满分：150分 命题人：第Ⅰ卷一、选择题：（本大题共12小题，每小题5分，共60分. 在每小题给出的四个选项中，只有一项是符合题目要求的.）1．已知命题p “2,0x N x ∃∈≤”，则p ⌝为（ ） A ．2,0x N x ∃∉≤． B ．2,0x N x ∃∈> C ．2,0x N x ∀∉> D. 2,0x N x ∀∈>2. 设集合{}0232=+−=x x x A ，{}01=−=ax x B ，若B B A =⋂，则实数a 组成的集合的子集个数是（ ）A. 2B. 3C. 4D. 8 3.下列各组函数是同一函数的是（ ） ①f (x )=√−2x 3与 g (x )=x √−2x ②f (x )=x 与g (x )=√x 2③f(x)=x 0与 g (x )=1x 0④f （x ）=x 2﹣2x ﹣1与g （t ）=t 2﹣2t ﹣1．A ． ①②B ． ①③C ． ③④D ． ①④ 4. 已知f (x )={ x −5 (x ≥6)f (x +2) (x <6)则f （3）为（ ）A ． 2B ． 3C ． 4D ． 5 5. 已知f (12x −1)=2x +3，且f (m )=6，则m 等于（ ）A ．−14B.14C.32D.−326.“函数f (x )=x 2−4ax +1在区间[4,+∞)上为增函数”的一个必要不充分条件是（ ）A. a ≤1B. a ≤2C.a ≤3D.a ≥2 7．已知集合A ={x|y =1√−x 2−x+2}，B ={y|y =√1−3x } 则（ ）A. A B ⊆B. B A ⊆C. A=B D ．A B ＝φ8. 已知f (x )={x +1, x ∈[−1,0)x 2+1, x ∈[0,1]，则如下图中函数的图象错误的是( )9. 当x <32时，函数y =x +82x−3 （ ）A.有最小值112B.有最大值−52C.有最大值52D. 有最小值−11210.已知函数f (x )={(1−5a )x −3a ， x <0 a x −2 , x ≥0(a >0且a ≠1)满足121212()(),,0f x f x x x R x x −∀∈<−，则实数a 的取值范围是（ ）[来源:Z#xx#k.A. (15,13] B.(0,13] C. (15,1) D. (13,1) 11.已知函数()12−=x xx f ，函数()x g 满足对任意实数x ，都有()()201742019−−=−x g x g 成立，且()x f y =与()x g y =的图像有8个交点，分别记为()()()882211,,,,y x y x y x ⋅⋅⋅，则()()821821y y y x x x ⋅⋅⋅++⋅⋅⋅+=( ) A.32 B.24 C.16 D.812.设f (x )=3x ,f (x )=g (x )−h(x),且g(x)为偶函数，h(x)为奇函数，若存在实数m ，使得当x ∈[−1,1]时，不等式mg(x)+h(x)≥0恒成立，则m 的最小值为（ ） A.45B.15C.54D.−45第II 卷二、填空题：（本大题共4小题，每小题5分，共20分） 13．函数y =(14)x 2+2x−3的单调递增区间是________________14.(√23×√3)6+(√2√2)43−4(1649)−12−√24×80.25−(−2018)0=________15.用[x ]表示不超过x 的最大整数，如[1.8]=1，[−1.8]=−2，下面关于函数f (x )=x −[x ]说法正确的序号是___________ ①x ∈[0,1)时，f (x )=x ； ②函数y =f(x)的值域是[0,1）；③函数y =f(x)与函数y =14x 的图像有4个交点； ④方程4f (x )−|x |=0的根的个数为7个.16.已知函数f (x )=2x −2−x +x 3+3x ,若正数a,b 满足 f (2a −1)+f (b −1)=0,则2a 2a+1+b 2+1b的最小值为_____________三、解答题：（本大题共6小题，满分70分，写出必要文字说明和演算步骤） 17．（本题满分10分） 已知集合A ＝{x|61x +≥1，x ∈R}，B ＝{x|x 2－2x －m<0}． (1)当m ＝3时，求A∩(∁R B)；(2)若A∩B＝{x|－1<x<4}，求实数m 的值．18．（本题满分12分）经市场调查，某种商品在过去50天的销售量（单位：件）和价格（单位：元件⁄）均为销售时间 t (单位：天)的函数，且销售量近似地满足f (t )=−2t +200 (1≤t ≤50,t∈N),前30天价格为g(t)=12t+30 (1≤t≤30, t∈N), 后20天价格为g(t)=45 (31≤t≤50,t∈N).⑴求该种商品的日销售额S与时间t的函数关系；⑵求日销售额S的最大值．19．（本题满分12分）已知定义域为[a−292,b]的函数f(x)=a+14x+1是奇函数．（1）求a和b的值；（2）判断()f x的单调性并证明你的结论；（3）若2(2)(212)0f t t f t−++<，求实数t的范围.20．（本题满分12分）解关于x的不等式 ax2−(a−2)x−2>0 (a∈R)21. （本题满分12分）已知函数f(x)=a∙4x−a∙2x+1+1−b(a>0)在区间[1,2]上有最大值9和最小值1.⑴求a,b的值；⑵若不等式f(x)−k∙4x≥0在x∈[−1,1]时有解，求实数k的取值范围。
辽宁省大连市瓦房店市2019-2020学年第一学期期中考试高一化学考试时间：90分钟分值：100 分注意事项：请将第I卷(选择题)答案用2B铅笔填涂到答题卡上，第II卷(非选择题)用0.5mm黑色碳素笔(作图除外)，作答在答题卡上，不得超出边框。
可能用到的相对原子质量：H 1 C 12 N 14 O 16 Na 23 A1 27 S 32 C1 35. 5第I卷选择题(共50分)一、单选题(每道题2分)1.朱自清先生在《荷塘月色》中写道：“薄薄的青雾浮起在荷塘里…月光是隔了树照过来的，高处丛生的灌木，落下参差的斑驳的黑影…”月光穿过薄雾形成的美景仙境，其本质原因是( )A.夜里的月色本身就很美B.颗粒直径约为1nm~ 100nm的小水滴分散在空气中C.光线是一种胶体D.雾是一种胶体，能产生丁达尔现象2.有关电解质的说法正确的是( )A.固体NaCl不导电，所以NaCl不是电解质B. SO3水溶液的导电性很好，所以SO3是电解质C.液态的铜导电性很好，所以铜是电解质D. Na2O 液态时能导电，所以Na2O是电解质3.对下列物质分类全部正确的是( )①纯碱②食盐水③石灰水④NaOH ⑤液态氧⑥KClO3A.碱——①④B.纯净物——③④⑤C.盐——①⑥D.混合物——②⑤4.下列叙述中，正确的是( )A.复分解反应一定都属于非氧化还原反应B.在氧化还原反应中，非金属单质一定是氧化剂C.某元素从化合态变为游离态时，该元素定被还原D.金属阳离子被还原一定得到金属单质5.当不慎有大量的氯气扩散到周围空间时，可以用浸某溶液的毛巾捂住鼻子以防中毒，合适的溶质是( )A. NaOHB. NaClC. NaHCO3D.氨水6.下列说法不正确的是( )A.用加热法可除去Na2CO3中的NaHCO3B.. Na2CO3的热稳定性大于NaHCO3C.可用石灰水区分Na2CO3与NaHCO3溶液D. Na2CO3和NaHCO3的水溶液均显碱性7.在下列条件的水溶液中可以大量共存的离子组是( )A.使酚酞变红的溶液中：Na+、Mg2+、Cl-、NO3-B.无色透明的溶液中：K+、SO42-、Na+、MnO4-C.无色透明的溶液中：SO42-、Cl-、Al3+、NH4+D.含大量H+的溶液中：CO32-、SO42-、K+、Cl-8.下列关于氯气的实验装置能达到实验目的的是( )①可用于氯气的收集②可用于除去氯气中少量的氯化氢气体③可证明氯气具有漂白性④可用于实验室中氯气的尾气吸收A.①②B.①③C.②③D.①④9.下列离子方程式正确的是( )A.硫酸溶液中滴加足量氢氧化钡溶液：H++SO42-+Ba2++OH- =H2O+BaSO4↓B.金属钠与水反应：Na+H2O=Na++OH-+H2↑C.碳酸钙与醋酸溶液反应：CaCO3+2H+=Ca2++H2O+CO2↑D.澄清石灰水中加入碳酸钠溶液：Ca2++CO32-=CaCO3↓10.氧化还原反应中，水的作用可以是氧化剂、还原剂、既是氧化剂又是还原剂、既非氧化剂又非还原剂等。
2019-2020学年辽宁省大连市高一期中数学试题及答案一、单选题1．已知a b >，且0ab ≠，则下列不等式正确的是（） A ．22ab> B ．22ab> C ．||||a b >D ．11a b <【答案】B【解析】通过反例可排除,,A C D ；根据2x y =的单调性可知B 正确. 【详解】当1a =-，2b =-时，22a b <，a b <，则,A C 错误； 当1a =，1b =-时，11a b>，则D 错误； 由2x y =单调递增可知，当a b >时，22a b >，则B 正确 本题正确选项：B 【点睛】本题考查不等关系的判断，解决此类问题常采用排除法，属于基础题. 2．已知集合{}221,M yy x x x R==--∈，{}24P x x =-≤≤，则集合M 与集合P 的关系是（ ） A ．PMB ．P M ∈C ．M PD ．M P【答案】D【解析】首先，化简集合M ，就是求解函数221y x x =--，x ∈R 的值域，然后，利用集合之间的基本关系进行判断即可． 【详解】解：由集合M 得2221(1)2y x x x =--=--，x ∈R2y ∴-， {|2}M y y ∴=-，{}24P x x =-≤≤，MP ∴，故选：D ． 【点睛】本题重点考查集合之间的基本关系，属于基础题，注意落实集合M 的元素取值情形．3．在下列给出的四个命题中，为真命题的是()A ．a R ∀∈，b Q ∃∈，220a b +=B ．n Z ∀∈，m Z ∃∈，nm m =C ．n Z ∀∈，m Z ∃∈，2n m >D ．a R ∀∈，b Q ∃∈，221a b +=【答案】B【解析】结合量词的命题的定义，举反例进行判断即可 【详解】A ，若2a =，则220a b +=不成立，故A 错误，B ，当0m =时，nm m =恒成立，故B 正确，C ，当1n =-时，2n m >不成立，故C 错误，D ，若2a =，则220a b +=不成立，故D 错误，故选B 【点睛】本题主要考查了命题的真假判断，根据特称命题和全称命题的定义和性质举出反例来进行判断，属于基础题。
辽宁省大连市2019-2020学年高一上学期期中考试试题数学第Ⅰ卷一、 选择题(本题共12小题，每小题5分，共60分.其中1-10小题为单选题，只有一个选项符合题意；11，12题为多选题，只有两个选项是对的，选对一个得3分，两个都对得5分，多选和选错都不得分)1.已知集合{}28120A x x x =-+≤,{}5B x x =≥，则A B =（ ） A.(),5-∞ B.[)2,5 C.[]2,5 D. []5,62.已知命题:p n N ∀∈，2n n >p ⌝是（ ） A.n ∀∈N ，2n n ≤B.n ∀∈N ，2n n <C.n N ∃∈，2n n ≤D.n N ∃∈，2n n >3.函数()y f x =的定义域关于原点对称是函数()y f x =具有奇偶性的（ ）A ．必要不充分条件B ．充分不必要条件C ．充要条件D ．既不充分也不必要条件4.若110a b<<，则下列结论不正确的是（ ） A. 22a b < B.2ab b < C.0a b +< D.a b a b +>+5.已知一元二次方程2230x mx ++=配方后为()222x n +=，那么一元二次方程2230x nx --=配方后为( )A ．()2528x +=B ．()2519x +=或()2519x -=C ．()2519x +=D ．()2528x +=或()2528x -=6.函数()35-+=x x x f 的实数解落在区间是（ ） A.[]0,1 B.[]1,2 C.[]2,3 D.[]4,37.下列四个函数中，在(],0-∞上为减函数的是（ ）A. ()22f x x x =-B. ()2f x x =-C. ()1f x x =+D. ()1f x x= 8.已知)12fx x x =+()f x =( ) A.()211x x -≥ B.21x - C.()211x x +≥ D.21x + 9.如果偶函数()f x 在[)0,+∞上是增函数且最小值是2，那么()f x 在(],0-∞上是（ ）A.减函数且最小值是2B.减函数且最大值是2C.增函数且最小值是2D.增函数且最大值是210.已知函数()21x f x x=+，则不等式()()10f x f x -+>的解集是（ ） A. {2}x x > B. {1}x x < C. 1{}2x x > D. {0}x x >11.（多选）关于函数()223f x x x =-++ ）A. 定义域、值域分别是[]1,3-,[)0,+∞B.单调增区间是(],1-∞C.定义域、值域分别是[]1,3-,[]0,2D. 单调增区间是[]1,1-12.（多选）下列判断不正确的是（ ）A.函数()1f x x=在定义域内是减函数. B.()g x 奇函数，则一定有()00g =.C.已知0x >，0y >，且111x y+=，若23x y m m +>+恒成立，则实数m 的取值范围是()4,1-. D.已知25(1)()(1)x ax x f x a x x⎧---≤⎪=⎨>⎪⎩在(),-∞+∞上是增函数，则a 的取值范围是[]3,2--.第Ⅱ卷二、填空题（本题共4小题，每小题5分，共20分.其中第16题两空，第一空2分，第二空3分）13.方程组202x y x y -=⎧⎨+=⎩的解集是________ . 14.已知0x <，则94x x+的最大值是 .15.已知函数()221f x x ax =++有两个零点，在区间()1,1-上是单调的，且在该区间中有且只有一个零点，实数a 的取值范围是 . 16.设实数,a b 是方程220140x x +-=的两个根，则22a b ab ++= ， 22a a b ++= .三、解答题：（本大题共6小题，共70分，解答题应写出文字说明、证明过程或演算步骤.）17.（本小题10分）已知全集为R ,函数()11f x x =-的定义域为集合A ,集合13{|}22B x x =-≥. （1）求A B ；（2）若{|1}C x m x m =-<<, ()C R CB C =,求实数 m 的取值范围. 18.（本小题12分）已知{}2320P x x x =-+≤，{}11S x m x m =-≤≤+.(1)是否存在实数m ，使x P ∈是x S ∈的充要条件？若存在，求出m 的取值范围.(2)是否存在实数m ，使x P ∈是x S ∈的必要不充分条件？若存在，求出m 的取值范围.19.（本小题12分）已知函数()f x 是定义在R 上的偶函数，当0x ≤时，2()2f x x x =+现已画出函数()f x 在y 轴左侧的图象，如图所示．(1)画出函数()f x 在y 轴右侧的图象，并写出函数()f x 在R 上的单调区间；(2)求函数()f x 在R 上的解析式．20.（本小题12分）选用恰当的证明方法，证明下列不等式.（167225（2）设,,a b c 都是正数，求证：bc ac ab a b c a b c++≥++.21.（本小题12分）某纪念章从2018年10月1日起开始上市，通过市场调查，得到该纪念章每1枚的市场价（单位：y 元）与上市时间（单位：x 天）的数据如下： 上市时间x 天4 10 36 市场价y 元 90 51 90 （1）根据上表数据，从下列函数中选取一个恰当的函数描述该纪念章的市场价y 与上市时间x 的变化关系并说明理由：①y ax b =+；②2y ax bx c =++；③a y b x=+． （2）利用你选取的函数，求该纪念章市场价最低时的上市天数及最低的价格．22.（本小题12分）已知函数2()(,,)1mx n f x m n R x R x +=∈∈+为奇函数，且1(1)2f =. （1）判断()f x 在1（，）+∞的单调性，并用定义证明； （2）求函数()f x 在区间1,(0)2k k k ⎡⎤+≥⎢⎥⎣⎦上的最大值()g k .答案第Ⅰ卷（选择题，共60分）一、选择题(本题共12小题，每小题5分，共60分.其中1-10小题为单选题，只有一个选项符合题意；11，12题为多选题，只有两个选项是对的，选对一个得3分，两个都对得5分，多选和选错都不得分) 1-5.DCADD 6-10.BAAAC 11-12. CD 、AB第Ⅱ卷（非选择题，共90分）二、填空题（本题共4小题，每小题5分，共20分.其中第16题两空，第一空2分，第二空3分）13、{(1,1)，(－2，－2)} 14、-3 15、()(),11,-∞-+∞ 16、2015，2013三、解答题：（本大题共6小题，共70分，解答题应写出文字说明、证明过程或演算步骤.） 17. 解：（1）{}1A x x =>，{}1,x 2B x x =≤≥，[)2,AB =+∞----3分 （2）①1,m 2C =∅≤------5分②1,22C m ≠∅<<------8分 综上2m <-----10分18. 解：P ＝{x |x 2－3x ＋2≤0}＝{x |1≤x ≤2}.---------------1分(1)要使x ∈P 是x ∈S 的充要条件，则P ＝S ，即⎩⎪⎨⎪⎧ 1－m ＝1，1＋m ＝2，此方程组无解，则不存在实数m ，使x ∈P是x ∈S 的充要条件。
