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2021届南充十中高三英语期末试题及答案

2021届南充十中高三英语期末试题及答案第一部分阅读（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A、B、C、D四个选项中选出最佳选项AThis online course is designed to provide you with work-ready skills including responding to job advertisements，writing application letters and resumes（简历）and developing inter-view skills．What topics will it cover?● The recruitment（招聘）and selection process● The job application● Planning for the interview● Developing interview skillsWhat will you achieve?By the end of the course，you'll be able to...● Assess the recruitment and selection process from an employer's point of view● Interpret an advertisement，job description and selection criteria correctly● Model a well-written job application● Plan for a job interviewWho is the course for?While this course appeals to trainees and graduates，it also applies to job seekersin the broader community looking to increasing their confidence and success rate when applying for work．Who develops the course?Central Queensland University．It is Australia's leading regional university．Our courses are designed alongside industry andmany include hands-on learning experiences and project-based learning．Our commitment to making real-world knowledge and skills accessible to all has seen us being awarded global recognition．1. What will students learn if they take the online course?A. The way to write a resume．B. The way to put an advertisement．C. The skills of talking with others．D. The skills of improving reading．2. Who is the online course intended for?A. Trainers．B. Interviewers．C. Job seekers．D. College students．3. Which ofthe following best describes the online course?A Cheap． B. Practical． C. Long-standing． D. World-class．BBorn in 1954, Oprah Winfrey is best known for her multi-award-winning talk show as the most influential woman in the world. It's no surprise that her recognition can bring overnight sales fortune that defeats most, if not all, marketing campaigns. The star features about 20 products each year on her "Favorite Things" show. There's even a term for it: the Oprah Effect.Her television career began unexpectedly. When she was 16 years old, she had the idea of being a journalist to tell other people's stories in a way that made a difference in their lives and the world. She was on television by the time she was 19 years old. And in 1986 she started her own television show with a continuous determination to succeed at first.TIME magazine wrote, "People would have doubted Oprah Winfrey's swift rise to host of the most popular talk show on TV. In a field dominated by white males, she is a black female of big size. As interviewers go, she is no match for Phil Donahue. What she lacks in journalistic toughness, she makes up for in plainspoken curiosity, rich humor and, above all understanding. Guests with sad stories to tell tend to bring out a tear in Oprah's eye. They, in turn, often find themselves exposing things they would not imagine telling anyone, much less a national TV audience.""I was nervous about the competition and then I became my own competition raising the bar every year, pushing, pushing, pushing myself as hard as I knew. It doesn't matter how far you might rise. At some point you are likely to fall if you' re constantly doing what we do, raising the bar. If you' re constantly pushing yourself higher, higher the law of averages, you will at some point fall. And when you do, I want you to know this, remember this: there is no such thing as failure. Failure is just life trying to move us in another direction" as Oprah addressed graduates at Harvard on May 30.4. What does the Oprah Effect refer to in the first paragraph?A. the influence on talk show hostsB. the power of Oprah's opinions.C. the effect on a business.D. the audience of Oprah's talk show.5. What can be inferred about Oprah's television career?A. She must have been challenged a lotB. She gained fame as planned.C. It lives up to her parents' expectation.D. She once gave up on her choice.6. What message did Oprah give to Harvard graduates?A. Success comes after failure.B. Pushing physical limits makes no senseC. Aiming higher hurtsD. Failure is part of life.7. Which of the following best describes Oprah Winfrey?A. Friendly.B. HumorousC. Determined.D. PatientCIf you could travel back in time, which period of history would you visit? It’s a great question to ask your friends, and time travel is the subject of many science fiction films. Of course, sci-fi is familiar to most of us, butwhat is cli-fi? The simple answer is climate fiction which focuses on the subject of climate change.Many of the cli-fi examples we watch tend to be disaster films. It could be solar flares (太阳耀斑), ice ages devastating (摧毁) the planet, extreme flooding swamping the earth with water, or super-storms that threaten life as we know it. While films and novels of this style are often subject to the typical images of a hero or heroine battling to save the day, what sets it apart from most sci-fi films is that the plots will often draw on apparently reasonable outcomes in the near future.Climate change and the potential threats have long been established. Some believe that the issue of climate change has even led to more fans watching films to learn more about what's happening to the world – seeing it as a form of edutainment. A study conducted by the Yale programme on Climate Change Communication tested the effects that two climate fiction novels can have on its readers and found “significant positive effects” in terms of their attitudes and beliefs towards the climate crisis – for example, understanding global warming will harm them and future generations.Most climate films are not only extremely popular action films, but also cause our fear of what some see as the approaching end of the world. This sounds bad, but according to a study conducted on 310 adults in the US, watching such scary films can help us feel more prepared and less alone in situations such as the pandemic (疫情). So, it looks like cli-fi is hereto stay – and there seem to be some benefits. Whether it’s there to educate, entertain or prepare you for a climate crisis, it might have a role to play.8. Which of the following may be the subject of cli-fi?A. Time travel.B. Global warming.C. Weather forecast.D. Economic climate.9. What can we learn about cli-fi films from paragraph 2?A. They are often about extreme natural disasters.B. They want to show that man can conquer nature.C. They usually have similar plots with sci-fi films.D. They can show the true near future of the world.10. Why is the study conducted by the Yale programme mentioned in paragraph 3?A. To prove that climate change has potential threats.B. To show that people like climate fiction novels.C. To tell that cli-fi novels have positive effects on readers.D. To explain how the climate crisis affect the human being.11. What does the writer mainly want to tell us in the last paragraph?A. Cli-fi films are very popular as action films.B. A study was conducted on 310 adults in theUS.C. The pandemic make people scared and alone.D. Cli-fi films are useful and will be here to stay.DIt was very cold and I had been watching a homeless man make himself comfortable in a “shelter” on the river bank. His “shelter” was a tarpaulin (油布)tied to rocks to keep the wind from blowing it away. He had been living there for over a month. I never saw him with warm clothing or food. I knew what I wanted to do.When I told my parents what I wanted to do they werealarmed. They said I could be putting myself at risk, taking a box to a homeless person at night! But I knew, in my deep heart, that I would be safe.I got a box. My parents watched as I added warm gloves, a heavy blanket ... into the box until it was full! Then, I put a Christmas card on top. It said, “Even though we hardly know each other, I want to wish you a Merry Christmas!” I put ten one-dollar bills inside it as well.My father insisted he went there with me as it was 10 pm on Christmas Eve. I said he could drive me but he had to stay in the car. He agreed.I took the box and walked towards his “house”. I called, “Sir, I have a Christmas box for you!”“Go away!” he shouted.“Sir,” I repeated.“Go away!” he shouted.“Why?” I asked him.He walked over and I expected to see an angry face. Instead I saw two of the most beautiful, gentle, blue eyes I have ever seen.“Merry Christmas!” I said.“Why are you doing this?” he asked.“Because you matter to me,” I said. With that I gave him the box.Tears came to his eyes and he thanked me. I got back to the car and watched him carry the box like it was filled with gold. I didn’t want to embarrass (使困窘) him by watching him any more so Dad and I left.12. The underlined word “alarmed” can best be replaced by _____.A. pleasedB. worriedC. disappointedD. surprised13. Why did the author ask his father to stay in the car?A. Because he wanted to prove he was brave.B. Because he believed the homeless man was bad.C. Because he wanted to protect his father from being hurt.D. Because he didn’t want the homeless man to feel bad.14. When the homeless man saw the author first, he was _____.A. quite angryB. very excitedC. quite puzzledD. very curious15. The author’s purpose in writing the text is to tell readers that _____.A. it is easier said than doneB. poverty is the mother of healthC. where there is a will, there is a wayD. a willing helper doesnot wait until he is asked第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

2020-2021学年南充十中高三英语期末考试试卷及答案解析

2020-2021学年南充十中高三英语期末考试试卷及答案解析第一部分阅读（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A、B、C、D四个选项中选出最佳选项AReturns & Refund Guarantee（保证；保证书）The “Returns & Refund Guarantee” is a promise provided by sellers for every item they sell on DHgate. com. When you receive an item that was bought and paid for on our site, and you find it is not as described or isof low quality, you can contact the seller to resolve these problems. DHgate will offer additional assistance if the seller is not cooperative.Scope（范围）The following points should not be included in the “Returns & Refund Guarantee”：▲The seller didn't make any promise.▲The seller can provide evidence to prove the items are as described.▲You didn't contact the seller within the promised time.▲You have released the payment to the seller before asking DHgate for help.Sellers are able to set up the following promises：Returning items for any reasonBuyers can return items for a refund within a specific date which has been set up by sellers, such as 3 days, and 7 days from the day when the items are received. The items' receiving date is the date that is indicated on the shipping carrier's official website. Buyers should prepay any return shipping cost, which will be given back to the buyers after the seller receives the items as long as the items are returned in the same exact condition as when they were delivered.Returns or Refunds accepted if the product has quality issuesBuyers can return the items for a refund when they are not as described or possess quality issues by communicating directly with the seller. The seller is responsible for the return shipping cost.Buyers can get a refund and keep the items when the items are not as described or possess quality issues by negotiating directly with sellers.1.Who can get additional assistance from DHgate in the guarantee?A.The buyers in physical stores.B.The buyers on DHgate. com.C.The sellers on DHgate. com.D.Both the buyers and the sellers.2.Which situation is within the scope of the guarantee?A.The seller didn't make any promise.B.The buyer has paid the seller in advance.C.The buyer asked for help within the promised time.D.The seller proves that there is nothing wrong with the item.3.Which of the following is true according to the passage?A.Not all the sellers make promises.B.DHgate sometimes will pay the buyers.C.Sellers should prepay return shipping cost.D.The buyer can't keep the items after getting a refund.B“My P.E. teacher taught me maths.”It has been a common joke for years but when a P.E. teacher applied for the head-teacher job, many parents worried that “the joke could come true”. Some parents asked, “Does the P.E. teacher know maths and English?If not, how is he supposed to tutor the students?” But there were still parents who believed P.E. teachers had more time to discipline the students since they didn’t have many classes.This concern is actually a “subject bias”, that is, choosing a P.E. teacher as the head-teacher is not good for the students’ grades since he doesn’t know Chinese, maths, or English. It is acceptable for Chinese teachers, maths teachers and English teachers to be head-teachers because these subjects are important to entrance exams and scores. Such a concern reflects parents’ anxiety in the current educational environment, which tends to link the head-teacher’s responsible subject with the facts whether the school cares about the class and the children’s performances in the subject.Many people care about their kids’ academic performances only. They don’t care about their kids’ P.E. performance at all. Even if kids have P.E. classes, parents care little. P.E. teachers are in humble position and their classes are often occupied by other teachers. Of course, if students, P.E. performance is related to grades and entrance exams, parents won’t mind “a P.E. teacher being the head-teacher”.At the moment, P.E. is gradually included in entrance exams.In terms of high school entrance examination,Guangzhouwill launch a new high school entrance exam which includes P.E. performance and Health examination in 2021, raising the score to 70 points.In terms of the college entrance examination, universities having the right of independent enrollments addedP.E. tests to their entrance exams in 2019. This practice is seen as an important signal that the assessment of physical fitness and athletic ability, which are important aspects of a student’s overall quality, may be included in the college entrance examination in the future.We hope that it’s a trend for P.E. teachers, music teachers and art teachers to become head-teachers.4. By saying “My P.E. teacher taught me maths”, what does the author intend to show us?A. It is just a joke that seldom happened in reality.B. P.E. teachers hardly assist students in maths.C. P.E. teachers are good at teaching maths..D. Parents doubt the ability of P.E. teacher.5. We can infer from paragraph 2 that a P.E. teacher .A. is of little benefit for students’ academic performanceB. is humbler than Chinese, math or English teachersC. reflects whether the school cares about the classD. gets unfairly judged due to the current educational system6. Why doesGuangzhouraise proportion of P.E. performance in high school entrance examination?A. To raise students’ awareness of physical health.B. To call on parents to pay attention to P.E. teachers.C. To test the overall ability of high school students.D. To make P.E. teachers equal with other teachers.7. What opinion does the author hold towards P.E. teachers working as head-teachers?A. Neutral.B. Unexpected.C. Supportive.D. Critical.CAs I was walking home，a boy seemed to be singing a song in a very low voice，walking infront of me and carrying some of the same high school books I had with me.I caught up to him，and said “Hello”．I could tell he wasstartled，and dropped one of his books.I picked it up and as I handed it to him，he said “Thank you.” in a strange way，like witha strong accent.We soon began walking together and talking.It turns out he was in my science class，and I didn’t even know it!His name was Ahmad，and his family had just moved here this school year.He invited me into his house，andhis family treated me like a special guest，which made me feel very welcome.He said hospitality (好客) is very basic to his culture，and strangers were always treated very kindly.His mom brought out some great food，and offered me some tea.Ahmad’s father and two sisters wanted to hearall about me and my family，and my schooling.Ahmad’s whole family had to leave their lifelong home because war had broken out，and it wasn’t safe there anymore.They left with only what they could carry.His family was happy to feel safe，and they got used toAmerican culture quickly.They seemed pleased that Ahmad had brought a friend home to meet them.And as my friendship with Ahmad has continued，I now realize that the world is so much bigger than I thought！I also realize that your friends don’t have to be just like you.Differences make the world go round.8. What does the underlined word “startled” in Paragraph 1 mean?A. Excited.B. Moved.C. Surprised.D. Interested.9. Why was the writer treated like a special guest by Ahmad’s family?A. They liked strangers who came to their home for help.B. They wanted to know more information about the writer.C. Strangers were always treated very kindly in their culture.D. The writer was an American and knew much about their culture.10. Where does the writer probably come from?A. Canada.B. America.C. China.D. Australia.11. What can we learn from the passage?A. People from different countries can be good friends.B. Friends need different cultures and different accents.C. Your friends should have a lot of things the same with you.D. You can’t make friends with people from other countries.DThe United Nations Educational, Scientific and Cultural Organization (UNESCO) included on December 17, 2020 China's Tai Chi on the RepresentativeList of the Intangible（无形的）Cultural Heritage of Humanity. The decision was announced during the online meeting of the UNESCO Intergovernmental Committee for the Safeguarding of the Intangible Cultural Heritage held from December 14 to19 inKingston, capital ofJamaica.“Born in the mid-17th century in a small village named Chenjiagou located in Central China's Henan province,Tai Chi is not only a kind of traditional Wushu integrated with slow movements and deep breathing, but is also deeply rooted in many areas of Chinese culture, such as medicine and philosophy,”Zhu Xianghua says, who is the son of the famous Tai Chi master Zhu Tiancai.Although it has spread to more than 150 countries and regions, attracting more than 100 million people to practice, the idea that Tai Chi is for the elderly has stopped many young people practicing the ancient Wushu. They think of it as a slow exercise, which is specially made and better suited for their grandparents. Instead, many young people are turning to the Indian practice of yoga（瑜伽）to relieve stress, which was placed on the UNESCO's List in 2019.In order to promote Tai Chi, joint efforts have been made from individuals and the Chinese government in the last decades. Xi'an Jiaotong University requires students to learn Tai Chi. Wang Yunbing, a professor in the university's sports center, stressed that Tai Chi is not only good physical exercise-researchers from the American College of Rheumatology find that it can help manage several diseases but is also conned ted to ancient Chinese eivilization. Since 2014, the World Tai Chi Championships have been held every two years by the International Wushu Federation. It provides a platform for communication and learning between the Tai Chi masters and Tai Chi lovers around the globe. In January 2020, Tai Chi became an official event in the 2026 Dakar Youth Olympic Games.12. What does Zhu Xianghua say about Tai Chi in paragraph 2?A. It originated from fast Kung Fu action.B. It was born around the 1750s in a village.C. It is related to other cultural fields ofChina.D. It integrates Chinese medicine and western philosophy.13. Why do some young people choose to practice yoga instead of Tai Chi?A. They think it easier to practice yoga to keep fit.B. The elderly stop young people practicing Tai Chi.C. They consider Tai Chi is custom-built for old people.D. Yoga was included in the world culture earlier than Tai Chi.14. What is the main purpose of the last paragraph?A. To promote contemporary Chinese civilization.B. To show many efforts made to popularize Tai Chi.C. To stress the importance of Chinese Tai Chi masters.D. To advise people to practise Tai Chi to cure diseases.15.Which of the following is the best title for the passage?A. Tai Chi Steps on the UNESCO's List.B. Tai Chi is Competing against Yoga.C. Tai Chi Has Regained populate Globally.D. Opinions Greatly Differ on Tai Chi and Yoga.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

四川省南充市第十中学2020年高二化学期末试题含解析

四川省南充市第十中学2020年高二化学期末试题含解析一、单选题（本大题共15个小题，每小题4分。

在每小题给出的四个选项中，只有一项符合题目要求，共60分。

）1. 某学生用碱式滴定管量取0.1 mol·L－1的NaOH溶液，开始时仰视液面读数为1.00 mL，取出部分溶液后，俯视液面，读数为11.00 mL，该同学在操作中实际取出的液体体积为()A．大于10.00 mL B．小于10.00 mLC．等于10.00 mL D．等于11.00 mL参考答案：A滴定管的“0”刻度在上，量取NaOH溶液，开始时仰视液面使读数偏大，取出部分溶液后，俯视液面使读数偏小，滴定前后刻度差为10.00 mL，但实际取出的液体体积偏大。

2. 空间实验室“天宫一号”的供电系统中有再生氢氧燃料电池（RFC），RFC是一种将水电解技术与氢氧燃料电池技术相结合的可充电电池。

下图为RFC工作原理示意图，有关说法正确的是A.当有0.1mol电子转移时，a电极产生0.56L气体（标准状况下）B.b电极上发生的电极反应是：4H2O+4e－＝2H2↑+4OH－C.c电极上进行还原反应，B电池中的H+可以通过隔膜进入A池D.d电极上发生的电极反应是：O2+4H＋+4e－＝2H2O参考答案：C略3. 下列说法不正确的是（）A. 0.2 mol·L－1的NaHCO3溶液中：c（Na+）>c（HCO3－）>c（OH－）>c（H+）B. 将等体积pH=4的盐酸和醋酸稀释成pH=5的溶液，醋酸所需加入的水量多C. 向氨水中逐滴滴入盐酸至溶液的pH=7，则混合液中：c（NH4+） = c（Cl－）D. pH=13的NaOH溶液与pH=1的醋酸溶液等体积混合后所得溶液的pH>7参考答案：D略4. 参考答案：B5. 下列物质属于混合物的是A．氯水B．液氯C．氧气D．氯化氢参考答案：A6. 下列的原子或原子团不属于有机官能团的是A．NO3- B．——OH C．—OH D．——H参考答案：A略7. 有机物 CH3CH(OH)CHO 不能发生的反应是（）A.酯化B.加成C.消去 D.水解参考答案：D略8. 如图是四种常见有机物分子的比例模型示意图．下列说法正确的是（）A．甲是甲烷，甲烷的二氯取代产物只有一种结构B．乙是乙烯，乙烯可与溴水发生取代反应使溴水褪色C．丙是苯，苯结构比较稳定，不能发生氧化反应D．丁是乙酸，一定条件下乙酸能跟乙醇发生酯化反应参考答案：A【考点】有机物的结构和性质．【分析】由比例模型可知四种常见有机物分别为甲烷、乙烯、苯、乙醇，结合对应物质的性质解答该题．【解答】解：A．甲烷为正四面体结构，甲烷中所有氢原子位置相同，所以其二氯代物只有1种，故A正确；B．乙是乙烯，乙烯中含有碳碳双键，可与溴水发生加成反应而使溴水褪色，不能发生取代反应，故B错误；C．丙是苯，苯结构比较稳定，但可燃烧，也为氧化反应，故C错误；D．丁是乙醇，不是乙酸，故D错误；故选A．9. 下面的电子结构中,第一电离能最小的原子可能是A. ns2np3B. ns2np5C. ns2np4D. ns2np6参考答案：C10. 当光束通过下列分散系时，能观察到丁达尔效应的是（）A. 蒸馏水B. 稀H2SO4C. CuSO4溶液D. Fe(OH)3 胶体参考答案：D略11. 下列说法正确的是A．锅炉水垢中的硫酸钙可用碳酸钠溶液处理，使之转化为碳酸钙，再用酸除去B．铝盐在水中可产生胶体，可用于自来水的杀菌消毒C．太阳能热水器、沼气的利用、乙醇汽油都涉及生物质能的利用。

2020年四川省南充市第十中学高一英语上学期期末试卷含解析

2020年四川省南充市第十中学高一英语上学期期末试卷含解析一、选择题1. ---Did you enjoy staying with your good friend last week,Lily?---Yes, I______ with him for a long time.A. haven’t stayedB. didn’t stayC. wouldn’t stayD. hadn’t stayed参考答案：D略2. The doctors are delighted to find that the patient is beginning to ______from heart trouble.A. uncoverB. discoverC. recoverD. cover参考答案：C3. The murderer(凶手), who was _____ to death by the judge last week, was only 20 years old.A. madeB. causedC. killedD. sentenced参考答案：D4. ---What about the drawing?---I’ve never seen _____ one .A. the nicerB. a nicerC. a nicestD. the nicest参考答案：B5. He dived_______into the river to save the girl and I was ______ moved by his deed.A. deep, deepB. deep, deeplyC. deeply, deepD. deeply, deeply参考答案：B6. Rubbish _______ to produce electricity after this kind of new machine is invited.A. will be usedB. will make use ofC. will be used ofD. will be made use of参考答案：D7. All the students went to the fields to take care of the little trees, ________ great damage had been done by the heavy rain.A. at whichB. to whichC. on whichD. with which参考答案：B考查定语从句。

2021届南充十中高三英语期末试卷及答案

2021届南充十中高三英语期末试卷及答案第一部分阅读（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A、B、C、D四个选项中选出最佳选项AProvincetown, Cape Cod RestaurantsAfter a day on the sands or exploring our charming town, enjoy local eats, from fresh seafood and lobster to authentic Italian. You’ll find many wonderful Provincetown, Cape Cod restaurants and cafes just steps away. Fanizzi’s RestaurantRight next door to our hotel, this award-winning local eatery is one of the finest Cape Cod restaurants. The menu highlights seafood, Italian, steaks, burgers, and fresh salads. Enjoy the Friday Fish Fry, Early Bird Specials, and Sunday Brunch, available from 10:00 a.m. to 2:00 p.m. all year long.539 Commercial Street 508-487-1964Napi’s RestaurantNapi’s serves dinner all year round and lunch from April to October. A cozy place located just off Commercial Street and overflowing with local art, this Cape Cod, Massachusetts classic specializes in everything from freshly caught seafood to Portuguese and Brazilian dishes to vegetarian items.7 Freeman Street 800-571-6274Mews RestaurantEnjoy views of Provincetown Harbor at this waterfront restaurant just steps from Surfside Hotel & Suites. Intercontinental dishes are served in the beach-level dining room, while upstairs you’ll find a casual American bistro. Summer months bring on a brunch menu, and dinner is served year-round.429 Commercial Street 508-487-1500The Red InnA favorite among our guests, The Red Inn is located on Provincetown’s picturesque waterfront which provides diners with the most gorgeous harbor views and spectacular sunsets. The Red Inn provides historic old world charm with new world pleasure. Their menu features the finest local seafood.15 Commercial Street 508-487-73341.Which restaurant offers a special breakfast for early risers?A.Fanizzi’s Restaurant.B.Napi’s Restaurant.C.Mews Restaurant.D.The Red Inn.2.What is special about The Red Inn?A.It exhibits the good local art.B.It is the finest local restaurant.C.It offers the best local seafood.D.It serves brunch all year round.3.What does the text mainly talk about?A.Accommodation.B.Life styles.C.Sightseeing.D.Dining.BJapan's prime minister encouraged the decision to ban viewers, even family members, by issuing a state of emergency order in Tokyo earlier this month in response to rising COVID-19 case numbers.From the perspective of sports psychologists, an Olympics without fans is a real-life science experiment that is helping researchers and clinicians to comb through the true impact of a crowd of fans on its players—and on viewers at home. The strange circumstances under which the games are held may place unexpected pressure on some athletes. On Tuesday, superstar gymnast Simone Biles dropped out of the women's team event, telling teammates and reporters she wasn't in the right “headspace” to compete. “It's been really stressful this Olympic Games. There are a lot of different variables going into it,” Biles told the Washington Post.The 2020 Summer Olympics bears similarities and differences to other major sporting events without viewers. The English Premier League supplemented (增加) game broadcasts with crowd noise from the soccer video game FIFA 20, mixed with game audio in real time. A Taiwanese baseball team and German soccer team began populating stands with cardboard cutouts of fans, and the trend caught on internationally.Jamey Houle, the lead sports psychologist for Ohio State University Athletics and a former Al-American gymnast, says competitive athletes are trained in visualization— imagining performing a certain action or motion, such as doing a roundoff back handspring in gymnastics. Without moving a muscle, players using visualization can solidify neural (神经的) connections and activate their motor cortex (皮层). To visualize most effectively, Houle says, athletes working with sports psychologists will try to simulate as closely as possible the conditions of actual gameplay. Empty stadiums may thus have a measurable impact on players' performance. This phenomenon is grounded in a psychological concept called “social facilitation”, referring to a change in a person's performance that occurs when others are around compared to when a person is alone.4. What caused Biles to drop out of the women's team event?A. The poor physical condition.B. The absence of the audience.C. The fiercely competitive event.D. The influence of crowds of fans.5. What can be inferred from Paragraph 3?A. The Taiwanese baseball team is a success.B. The tendency mentioned is popular among some sporting events.C. The 2020 Summer Olympics is stricter in preventing the pandemic.D. The crowd noise plays a leading role in the English Premier League.6. How does Houle explain the impact of empty stadiums on players' performance?A. By doing a roundoff back handspring.B. By simulating the conditions of actual gameplay.C. By using the concept called social facilitation.D. By changing the viewers of a player.7. What message does the author mainly convey in the text?A. Athletes should be trained in visualization.B. Audience should be admitted to the Olympics.C. Social facilitation is helpful to sporting events.D. Viewers present may influence players' performance.CSaroo Brierley, a 4-year-old boy, livedin ruralIndia. One day, he played with his brother along the rail line and fell asleep. When he woke up, he found himself alone. So he got on the train in front of him to search for his brother.That train took him a thousand miles across the country to a totally strange city. He lived on the streets, and then in an orphanage (孤儿院), where he was adopted by an Australian family and taken to Tasmania.Brierley is a famous writer now, and in his new book,A Long Way Home, he wrote he couldn’t help but wonder about his hometown back inIndia. He remembered landmarks, but since he didn’t know his town’s name, finding a small neighborhood in a vast country seemed impossible.Then he found a digital mapping program. He spent years searching for his hometown in the program’s satellite pictures. In 2011, he came across something familiar. He studied it and realized he was looking at a town’s central business district from a bird’s-eye view. He thought, “On the right-hand side you should see the three-platform train station”—and there it was. “And on the left-hand side you should see a big fountain”—and there it was. Everything matched!Standing in front of the house where he grew up as a child, he saw a lady standing at the entrance. It took him a few seconds but he finally remembered what she used to look like.In an interview Brierley says, “My mother came forth and walked forward, and I walked forward, my eyes filled with tears and my brain blank. I just didn’t know what to say, because I never thought seeing my motherwould ever come true. And here I am, standing in front of her.”8. Why did Brierley get on the train when he was a little boy?A. To go back to his home.B. To look for his brother.C. To travel toTasmania.D. To follow a stranger.9. What made it difficult for Brierley to find his hometown?A. The vast area ofIndia.B. The fact that he was nobody then.C. His not remembering the town’s name.D. The distance betweenAustraliaand his hometown.10. How did Brierley find his hometown?A. By studying digital maps.B. By analyzing old pictures.C. By travelling all aroundIndia.D. By spreading his story via his book.11. What’s the best title of the passage?A. Love for MotherB. Union with BrotherC. Memory of HometownD. Long Way back HomeDByteDance（字节跳动）Group’s TikTok, an overseas version of Chinese short video sharing app Douyin, faces an existential crisis in the United States, as murmurs of a “crackdown”（强制取缔）from the White House forced the Chinese company toengage in talks on selling its US business to Microsoft.TikTok is the fastest-growing registered global mobile internet app, with more than 100 million users, and its rapid growth, especially in the US, is seen as a threat to Facebook. The US government has long viewed globally competitive Chinese high-tech companies including Huawei as a threat and done whatever it could to crack down on（打击）them in the name of “national security”.The US government has not introduced any specific policy against TikTok only threatened it through anumber of unclear statements.According to the latest media reports, Microsoft is prepared to press ahead withthe negotiations to take over TikTok’s US operations and complete the negotiations by Sept 15, following talks between Microsoft CEO Satya Nadella and US President Donald Trump.This means that TikTok will have to hand its fate over to some unpredictable power, and even have to sell its assets without the option of setting a price.The US government has failed to find a reasonable legal excuse to deal with TikTok. All private data of TikTok’s US users are stored in the US and are unlikely to be transferred. Considering the US government is trying to deal with TikTok in a political way, TikTok should consider incorporating（合并）the dispute into the US legal process to assert（坚持）its legal rights and interests.TiKTok’s core value lies in its unique algorithms,a product of artificial intelligence that represents the expertise of Chinese engineers and programmers with high-value intellectual property.The US government’s move, which has forced ByteDance to sell TikTok to a US company, is similar to a forced technology transfer and an example of the US’ openseizureof Chinese intellectual property.If ByteDance sells TikTok to a US company for “security reasons", that would set a dangerous precedent, motivating other countries where TikTok operates to follow the US administration's example and cause a chain reaction.ByteDance is a young Chinese private company that cannot deal with a political game played by the US. But as a Chinese company that has gone global, ByteDance has reasons to take up legal means to defend its legal rights. The Chinese government can also consider examining whether the technology transfer in the deal violates China’s law and harms the country’s national interests.12. What is the most valuable as for TikTok?A. Its global popularity.B. Its artificial intelligence.C. Its registered global mobile internet app.D. Its private data of TikTok’s worldwide users.13. Why does the American government force the Chinese company to hand over TikTok’s US operations to a US company?A. Out of so-called political reasons.B. Out of so-called debt reasons.C. Out of so-called technical reasons.D. Out of so-called security reasons.14. What does the underlined word “seizure”probably mean in Para. 8?A. An untrue spoken statement about someone.B. The use of legal authority to take sth from sb.C. The crime of stealing sth from a person or place.D. The act of trying to hurt somebody using physical violence.15. What can be the best title for the news report?A. TikTok must defend its rights legallyB. TikTok is seen as a threat to FacebookC. ByteDance has to sell TikTok to a US companyD. ByteDance agrees to transfer technology第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

2020-2021学年南充十中高三英语上学期期末试题及答案

2020-2021学年南充十中高三英语上学期期末试题及答案第一部分阅读（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A、B、C、D四个选项中选出最佳选项AFind Your Chicago Architecture TourChicago is known around the world for its architecture. Whether you tour downtown or a neighborhood, our guides will tell you the stories behind the buildings.Must-see ChicagoMust-see Chicago is a fast-paced, 90-minute tour to Chicago featuring(以…为特色) some of its most famous buildings, including the Wrigley Building, Tribune Tower and more! Get a brief overview of more than a dozen buildings—as well as Chicago landmarks like Millennium Park, the Loop and the Chicago River.Duration: 1.5 hoursPrice: $ 26 public, free for CAC membersArchitecture HighlightsDiscover the exciting diversity(多样性) of Chicago architecture, which traces the city’s development from its founding through present day. We cover about 30 miles of Chicago design, passing through the Loop and the Gold Coast, as well as Hyde Park and other areas of the South Side. We’ll see two university campuses and several parks.Duration: 3.5 hoursPrice: $ 55 public, free for CAC membersHistoric Treasures of Chicago’s Golden AgeLearn about the great architectural landmarks of Michigan Avenue and State Street, with views inside beautiful buildings from the 1890s〜1930s. The most memorable parts include the amazing interiors(内部) of the Palmer House Hotel and the Chicago Cultural Center.Duration: 2 hoursPrice: $ 26 public, free for CAC membersElevated Architecture: Downtown “L” TrainExplore Chicago’s amazing architecture from the unique view of elevated trains and station platforms. Learn the history behind the famous “L” system and hear how it has shaped the development of buildings within theLoop. The city’s first elevated train started making trips in 1892. Now considered one of Chicago’s most wonderful features, the “L” offers impressive views of downtown.Duration: 2 hoursPrice: $ 26 public, free for CAC members1.Which tour can you choose if you want to see Millennium Park?A.Must-see Chicago.B.Historic Treasures of Chicago’s Golden AgeC.Architecture Highlights.D.Elevated Architecture：Downtown “L” Train.2.When visiting Architecture Highlights, a couple should pay ______.A.$55B.$ 110C.$ 165D.$ 2203.What can you see on the third tour?A.The Chicago River.B.The Gold Coast.C.The elevated trains.D.The Palmer House Hotel.BIn someareas ofCalifornia, it’s so dry that farmers aren’t willing to plant crops this season. Growers, north ofSan Francisco, have begun pulling out of local farmers markets.CountyLineHarvest, which farms more than 30 acres inPetaluma, hasn’t had enough water to grow all the peppers, lettuces and other produce for a long time, according to a video on its Instagram page. Nearby farms arc saying the same, emphasizing (强调) the effect of theextendeddry periods.Californiagrows a third of theUnited States' vegetables and two-thirds of the nation's fruits and nuts. If dry weather prevents farmers from growing plants, that could lead to pushing up the price of food that's already starting to affect theU.S.economy.“Due to severe drought, for the first time in 21 years, we will not be able to grow this summer inPetaluma,"CountyLinesaid in its post.Drew Lerner, president of World Weather Inc. inKansas, saidCalifornia“missed the rainy season" and won't see much moisture (水分) over the next several months.A La Nina weather pattern in the Pacific pushed winter storms north and away from the state, leaving it with less moisture than usual. AsCaliforniagets most of its water from winter storms, little relief is expected before October.That has left growers such as Shao Shan Fann in a bind. The business can’t offer the selection of Asian vegetables and Bay Area staples it usually grows at its Bolinas location, according to its website.Nearby, Green Valley Community Farm has access to only about 5% of the water it usually relies on, owner David Plescia said. He’s looking for new land with enough water to use, and also has a permit in the works to grow cannabis to make up for the lost income. If it doesn’t make it, he’ll leave the fields empty.“It’s part of our generation’s cross to bear, figuring out how to run small — or medium-scale farm businesses in this kind of atmosphere of highly variable rainfall,” Andrew said.4. What does the underlined word “extended” in the second paragraph mean?A. Hot.B. Short.C. Long.D. Wonderful.5. Which is the result if the dry weather stops famers from planting crops?A. Theincreaseinthe priceof food.B. The growth of economy inU.S.C.Lessmoisture than usual.D. The low price of Asian vegetables.6. From what Andrew said, we can infer (推断) all of the following statements EXCEPT that________.A. The climate is not very goodB. It is part of the burden for people of his generationC. It is hard for him to run his farm businesses insuch bad climateD. He is sure that the serious drought will come to an end soon7. What does the passage mainly talk about?A. How do the famers run businesses inCalifornia.B. How does the owner look for new land with enough waterC. California farmers facing drought choose not to plant crops.D. The farm economy of theUnited Stateshas changed a lot.CIn Japan many workers for large corporations have a guarantee of lifetime employment. They will not be laid off during recessions or when the tasks they perform are taken over by robots. To some observers, this is capitalism at its best, because workers are treated as people not things. Others see it as necessarily inefficient and believe it cannot continue if Japan is to remain competitive with foreign corporations more concerned about profits and less concerned about people.Defenders of the system argue that those who call it inefficient do not understand how it really works. In the first place not every Japanese worker has the guarantee of a lifetime job. The lifetime employment systemincludes only “regular employees.” Many employees do not fall into this category, including all women. All businesses have many part time and temporary employees. These workers are hired and laid off during the course of the business cycle just as employees in the United States are. These “irregular workers” make up about 10 percent of the nonagricultural work force. Additionally, Japanese firms maintain some flexibility through the extensive use of subcontractors. This practice is much more common in Japan than in the United States.The use of both subcontractors and temporary workers has increased markedly in Japan since the 1974-1975 recession. All this leads some people to argue that the Japanese system really is not all that different from the American system. During recessions Japanese corporations lay off temporary workers and give less business to subcontractors. In the United States, corporations lay off those workers with the least working experience. The difference then is probably less than the term “lifetime employment” suggests, but there still is a difference. And this difference cannot be understood without looking at the values of Japanese society. The relationship between employer and employee cannot be explained in purely contractual terms. Firms hold on to the employees and that employees stay with one firm. There are also practical reasons for not jumping from job to job. Most retirement benefits come from the employer. Changing jobs means losing these benefits. Also, teamwork is an essential part of Japanese production. Moving to a new firm means adapting to a different team and at least temporarily, lower productivity and lower pay.8. According to the passage, a woman in Japan _________.A. cannot get a lifetime jobB. is impossible to get a part time jobC. will be employed for lifeD. is among the regular workers9. Which of the following is NOT the reason why Japanese workers stay with one firm?A. They don’t want to lose their retirement benefits.B. They are not adaptable people.C. Any change of jobs will make them less paid.D. They get used to the teamwork.10. It can be inferred from the passage that _________.A. those who want to change jobs frequently in Japan should think twiceB. those who are first laid off by American corporations are temporary workersC. the use of subcontractors makes Japanese firms less flexibleD. the Japanese system is totally different from the American system11. What does the passage mainly discuss?A. The extremely hard situation during recessions.B. The extensive use of subcontractors in Japan.C. The characteristics of corporations in the United States.D. The features of lifetime employment in Japan.DI cried the first time I saw the Notre Dame（巴黎圣母院）years ago. I'd waited my entire life to see this great French architecture, and experienced it in its full glory on a bright sunny day. Last night, I again cried for the centuries-old church while watching it burn.I hadn't expected to spend my evening that way. My friend and I were having dinner at a cafe a block or so away from the Notre Dame, choosing to skip going inside with the intention to go back the next day.However, we heard that it caught fire, so we left the cafe and ran towards the church, following heavy smoke from it, and soon we joined a nearly silent crowd. Some were praying, some were crying, but most were staring in disbelief at the disaster happening before us. The fire continued to get worse. About 400 firefighters were working to control the fire. We could see their flashlights shining as they inspected the front from a balcony.The Notre Dame is part of the heartbeat ofParis, I reflected on the experiences I've had there, from attending a bread market out front to admiring the beautiful windows and architecture inside. It is a spot that helps makeParismagical. And here we were, watching it burn down. It was too much to handle, but it was impossible to look away.About 9：30 pm, the gathered crowd spontaneously（自发地）began to sing Hymns（圣歌）to the church. We sang along with the group, feeling at once less like tourists and more like members of them. I hadn't imagined all that before.For hundreds of years, the Notre Dame hasseen the most joyous and the most terrible moments in the lives of both France and her people. And when everyone was able to become one emotional force, it showed that even in her darkest hour, the Notre Dame was still there to bring us all together.12. Why did the author cry for the Notre Dame for the first time?A. She was touched by its greatness.B. She was sorrowful to watch it burn.C. She was regretful for missing its glory.D. She was excited about French cultures.13. What was the author doing when the Notre Dame caught fire?A. Heading for a faraway cafe.B. Visiting a church with a friend.C. Eating nearby with a friend.D. Wandering along the street alone.14. What can we know about the fire scene?A. People expressed their sadness in different ways.B. People were nervously rushing in different directions.C. Hundreds of volunteers joined in putting out the fire.D. Firefighters kept people away with shining flashlights.15. What impressed the author most?A. The church allowed visitors to gaingreat experiences.B. Many foreign tourists became members of the church.C. The church survived disasters for hundreds of years.D. People were brought together to sing to the church.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

2020年南充十中高三英语下学期期末试卷及参考答案

2020年南充十中高三英语下学期期末试卷及参考答案第一部分阅读（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A、B、C、D四个选项中选出最佳选项ARome can be pricey for travelers, which is why many choose to stay in a hostel (旅社). The hostels in Rome offer a bed in a dorm room for around $25 anight, and for that, you’ll often get to stay in a central location (位置) with security and comfort.Yellow HostelIf I had to make just one recommendation for where to stay in Rome, it would be Yellow Hostel. It’s one of the best-rated hostels in the city, and for good reason. It’s affordable, and it’s got a fun atmosphere without being too noisy. As an added bonus, it’s close to the main train station.Hostel Alessandro PalaceIf you love social hostels, this is the best hostel for you in Rome. Hostel Alessandro Palace is fun. Staff members hold plenty of bar events for guests like free shots, bar crawls and karaoke. There’s also an area on the rooftop for hanging out with other travelers during the summer.Youth Station HostelIf you’re looking for cleanliness and a modern hostel, look no further than Youth Station. It offers beautiful furnishings and beds. There are plenty of other benefits, too; it doesn’t charge city tax; it has both air conditioning and a heater for the rooms; it also has free Wi-Fi in every room.Hotel and Hostel Des ArtistesHotel and Hostel Des Artistes is located just a 10-minute walk from the central city station and it’s close to all of the city’s main attractions. The staff is friendly and helpful, providing you with a map of the city when you arrive, and offering advice if you require some. However, you need to pay 2 euros a day for Wi-Fi.1.What is probably the major concern of travelers who choose to stay in a hostel?fort.B.Security.C.Price.D.Location.2.Which hotel best suits people who enjoy an active social life?A.Yellow Hostel.B.Hostel Alessandro Palace.C.Youth Station Hostel.D.Hotel and Hostel Des Artistes.3.What is the disadvantage of Hotel and Hostel Des Artistes?A.It gets noisy at night.B.Its staff is too talkative.C.It charges for Wi-Fi.D.It’s inconveniently located.BChancellor of the Exchequer George Osborne said yesterday he would use the autumn spending review to increase Britain’s￡12bn-a-year aid budget towards humanitarian(人道主义的) causes in the wake of the European refugee(难民) crisis.Britainpromised to spend 0.7 percent of state general product on aid, meaning the budget could rise sharply by the end of the decade as the economy grows.Mr Osborne also said more of the aid budget could be given to help local government with housing costs for incomers, without breaking international guidelines.“We will use the foreign aid budget to help with the costs of these refugees. People ask about the pressure on public services; we’ll have extra money to help with that.”The government was unable to give a figure for how much aid money could be handed to local authorities: it would depend on how many refugees are accepted.David Cameron, Prime Minister, will set out his position on aid for refugees today. It is reported thatBritainwill accept at least 10,000 extra people from camps on theSyriaborder. He will use a statement in the House of Commons to flesh out plans — announced inMadridon Friday — to take more people.A report inThe Sunday Timesthat the UK would take 15,000 Syrians, not far from the 18,000 figure demanded by the EU, was described by “Downing Street” as a “guess”.TheUKwill offer to resettle Syrians directly from refugee camps inJordan,LebanonandTurkey— but not those who have already reached the EU.4. What is the main idea of the passage?A. Britain tried to help refugees.B. People doubtBritain’s kindness.C. Britain tried to explain its behavior.D. Refugees like to live inBritain.5. What can we infer from the first two paragraphs?A. Britain’s economy grows rapidly.B. Britain will use little of its money to help refugees.C. Most countries are not willing to help refugees.D.Britainwill use more money to help refugees.6. Which of the following statements is TRUE?A. Britain will use foreign money to help refugees.B. Britain helps refugees following international guidelines.C. Britain will use foreign money to develop themselves.D. People ask to use public service money to help refugees.7. What can we know from the passage?A. Britain can hold 10,000 refugees at most.B. The number of refugees to be received is uncertain.C. House of Commons declare a general plan.D.Britaincan hold 15,000 refugees at most.CIt was five years ago that something unforgettable happened. My wife and I celebrated our 40thwedding anniversary that year. It was a lovely event hosted by our sons for us. My wonderful friends from the past surprised us with gifts and congratulations. Our gift to each other was a driving trip out west. We drove fromOntariointoAlberta, then southward intoGlacierNational ParkinMontana, and continued toYellowstoneNational Park.It was a cold spring day, and theBeartooth Highwayhad opened for the season just days before. Alongside the road, there was still a great amount of snow there. The scenery was so impressive that we made lots of stops to record memories with my camera. At the highest point of the highway, I stopped at a lookout to catch the amazing views, with my wife in the centre of my camera lens.There were not many cars on the road. Sometimes, cars with energetic young tourists passed by. And then we heard a motorcycle in the distance. The driver of the motorcycle, who wore dirty clothes, parked behind our cars. As he approached us, his only words were, “Give me your camera and get over there with your wife.” I must admit I felt nervous that we might be robbed where we just created some beautiful memories. Surprisingly, he just took a picture of us, handed back my camera and rode off before we could express our gratitude. The photo he took is one of the most valuable and prized of our trip.I learned my lesson somewhere I least expected it. We should never judge a man by his appearance. If the motorcycle driver reads this story and remembers the situation, we would like to say “Thank you” to him.8. According to the passage, what do we know about the trip?A. It was taken by train to the west.B. It was a suggestion from their friends.C. It was in the late autumn five years ago.D. It was a gift for their wedding anniversary.9. Why was the author nervous when the motorcycle driver offered to take a picture?A. He could have lost the camera.B. His wife might not be satisfied with the view there.C. The motorcycle driver would borrow the camera.D. The motorcycle driver might not be good at the taking pictures.10. Which of the following best describes the driver of the motorcycle?A. Kind and straightforward.B. Rich and generous.C. Creative and capable.D. Careful and admirable.11. Which of the following can be concluded from the passage?A. No pains, no gains.B. Seeing is believing.C. Don’t judge a book by its cover.D. The longest journey begins with the first step.DI don’t want to talk about being a woman scientistagain. There was a time in my life when people asked constantly for stories about what it’s like to work in a field dominated (controlled) by men. I was never very good at telling those stories because truthfully I never found them interesting. What I do find interesting is the origin of the universe, the shape of space, time and the nature of black holes.At 19, when I began studying astrophysics (天体物理学), it did not bother me in the least to be the only woman in the classroom. But while earning my Ph.D. at MIT and then as a post-doctor doing space research, the issue started to bother me. My every achievement — jobs, research papers, awards — was viewed through the lens (镜片) of gender (性别) politics. So were my failures. Sometimes, when I was pushed into an argument on left brain versus (相对于) right brain, or nature versus nurture (培育), I would instantly fight fiercely on my behalf and all womankind.Then one day a few years ago, out of my mouth came a sentence that would eventually become my reply toany and all provocations (挑衅): I don’t talk about that anymore. It took me 10 years to get back the confidence I had at 19 and to realize that I didn’t want to deal with gender issues. Why should curing sexism be yet another terrible burden on every female scientist? After all, I don’t study sociology or political theory.Today I research and teach at Barnard, a women’s college in New York City. Recently, someone asked me how many of the 45 students in my class were women. You cannot imagine my satisfaction at being able to answer, 45.I know some of my students worry how they will manage their scientific research and a desire for children. And I don’t dismiss those concerns. Still, I don’t tell them “war” stories. Instead, I have given them this: the visual of their physics professor heavily pregnant doing physics experiments. And in turn they have given me the image of 45 women driven by a love of science. And that’s a sight worth talking about.12. Why doesn’t the author want to talk about being a woman scientist again?A. She is fed up with the issue of gender discrimination (歧视).B. She feels unhappy working in male-dominated fields.C. She is not good at telling stories of the kind.D. She finds space research more important.13. From Paragraph 2, we can infer that people would attribute (把……归因于) the author’s failures to ________.A. the burden she bears in a male-dominated societyB. her involvement in gender politicsC. her over-confidence as a female astrophysicistD. the very fact that she is a woman14. What did the author constantly fight against while doing her Ph.D. and post-doctoral research?A. Lack of confidence in succeeding in space science.B. Unfair accusations from both inside and outside her circle.C. People’s fixed attitude toward female scientists.D. Widespread misconceptions about nature and nurtured.15. What does the image the author presents to her students suggest?A. Women students needn’t have the concerns of her generation.B. Women can balance a career in science and having a family.C. Women have more barriers on their way to academic success.D. Women now have fewer problems pursuing a science career.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

南充初中期末考试题及答案

南充初中期末考试题及答案一、选择题（每题2分，共20分）1. 下列哪项不是哺乳动物的特征？A. 胎生B. 哺乳C. 有羽毛D. 有毛发答案：C2. 地球的赤道周长大约是多少？A. 4万公里B. 8万公里C. 12万公里D. 16万公里答案：B3. 以下哪种乐器属于弦乐器？A. 钢琴B. 长笛C. 小提琴D. 鼓答案：C4. 光合作用主要发生在植物的哪个部位？A. 根C. 叶D. 花答案：C5. 以下哪个国家是亚洲国家？A. 巴西B. 澳大利亚C. 中国D. 加拿大答案：C6. 以下哪个选项是正确的数学表达式？A. 2 + 3 = 5B. 3 × 4 = 12C. 6 ÷ 2 = 3D. 8 - 5 = 2答案：C7. 以下哪种运动属于奥运会项目？A. 篮球B. 橄榄球C. 棒球D. 乒乓球答案：A8. 以下哪种元素是人体必需的微量元素？B. 铜C. 钙D. 钠答案：B9. 以下哪个城市是四川省的省会？A. 成都B. 重庆C. 贵阳D. 昆明答案：A10. 以下哪个朝代是中国历史上最后一个封建王朝？A. 唐朝B. 宋朝C. 明朝D. 清朝答案：D二、填空题（每题2分，共20分）1. 地球的自转周期是______小时。

答案：242. 人体的正常体温大约是______摄氏度。

答案：373. 我国的国花是______。

答案：牡丹4. 世界上最大的海洋是______。

答案：太平洋5. 化学元素周期表中，最轻的元素是______。

答案：氢6. 我国的国旗是______。

答案：五星红旗7. 世界上最高的山峰是______。

答案：珠穆朗玛峰8. 世界上最长的河流是______。

答案：尼罗河9. 我国最大的淡水湖是______。

答案：鄱阳湖10. 我国最大的沙漠是______。

答案：塔克拉玛干沙漠三、简答题（每题5分，共30分）1. 请简述光合作用的过程。

答案：光合作用是植物、藻类和某些细菌利用光能将二氧化碳和水转化为有机物，并释放氧气的过程。

四川省南充市2022届数学七年级上学期期末学业水平测试试题模拟卷四

四川省南充市2022届数学七年级上学期期末学业水平测试试题模拟卷四一、选择题1．如图，已知线段AB 的长度为a ，CD 的长度为b ，则图中所有线段的长度和为( )A.3a+bB.3a-bC.a+3bD.2a+2b 2．如图，甲从A 点出发向北偏东70°走到点B ，乙从点A 出发向南偏西15°方向走到点C ，则∠BAC 的度数是（）A.125°B.160°C.85°D.105° 3．如图，直线相交于，平分，给出下列结论：①当时，；②为的平分线；③与相等的角有三个；④。

其中正确的结论有（）A.个B.个C.个D.个4．某书店把一本新书按标价的八折出售，仍获利20%，若该书进价为20元，则标价（）A ．24元B ．26元C ．28元D ．30元5．在如图所示的2019年1月的月历表中，任意框出表中竖列上的三个相邻的数，这三个数的和不可能是( )A.27B.51C.65D.726．化简：a ﹣（a ﹣3b ）=_____．7．下列说法正确的是（）A.不是单项式B.的系数是C.的次数是D.多项式的次数是 8．若关于x 的方程230m mx m --+=是一元一次方程，则这个方程的解是（）A.0x =B.3x =C.3x =-D.2x =9．下列说法正确的是（）A.25xy -的系数是2-B.3ab 的次数是3次C.221x x +-的常数项为1D.2x y +是多项式 10．下列说法正确的是（）A.负数没有倒数B.正数的倒数比自身小C.任何有理数都有倒数D.1-的倒数是1- 11．﹣3的倒数为（）A ．﹣3B ．﹣13C ．3D ．1312．-2017的相反数为（） A.2017B.－2017C.12017D.12017-二、填空题13．如图，B 处在A 处南偏西50°方向，C 处在A 处的南偏东20°方向，C 处在B 处的北偏东80°方向，则∠ACB=_____．14．已知 A 、B 、C 三点在同一条直线上，M 、N 分别为线段 AB 、BC 的中点，且 AB=60，BC=40，则 MN 的长为 ______15．某微信平台上一件商品标价为200元，按标价的八折销售，仍可获利20元，则这件商品的进价为_____．16．对于任意有理数a ．b ，定义关于“⊗”的一种运算如下：a ⊗b ＝2a ﹣b ，例如：5⊗2＝2×5﹣2＝8，（﹣3）⊗4＝2×（﹣3）﹣4＝﹣10．若（x ﹣3）⊗x ＝2012，则x 的值为_____．17．在某多媒体电子杂志的某一期上刊登了“正方形雪花图案的形成”的演示案例：作一个正方形，设每边长为4a ，将每边四等分，作一凸一凹的两个边长为a 的小正方形，得到图形如图（2）所示，称为第一次变化，再对图（2）的每个边做相同的变化，得到图形如图（3），称为第二次变化．如此连续作几次，便可得到一个绚丽多彩的雪花图案．如不断发展下去到第n 次变化时，图形的面积是否会变化，________（填写“会”或者“不会”），图形的周长为__________．18．已知()215234m x y m y --+是四次三项式,则m =________. 19．a 的相反数是，则a 的倒数是___________。

四川省南充市2023-2024学年高一上学期期末考试数学(含答案)

南充市2023—2024学年度上期普通高中年级学业质量监测数学试题（答案在最后）注意事项：1.答卷前，考生务必将自己的姓名、准考证号填写在答题卡上.2.回答选择题时，选出每小题答案后，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，再选涂其他答案标号.回答非选择题时，将答案写在答题卡上.写在本试卷上无效.3.考试结束后，将答题卡交回.第Ⅰ卷一、单选题：本题共8小题，每小题5分，共40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.已知全集U =R ，{}26A x x =<<，{}04B x x =<≤，则()U B A ⋂=ð（）A.{}02x x <≤ B.{}02x x << C.{}0,2 D.∅2.命题“01x ∃>，20010x ax ++≤”的否定是（）A .1x ∀>，210x ax ++≤ B.1x ∀>，210x ax ++>C.1x ∀≤，210x ax ++≤ D.1x ∀≤，210x ax ++>3.函数()sin f x x x =⋅的部分图象可能是（）A. B.C. D.4.函数()2log 4f x x x =+-的零点所在的一个区间为（）A.()0,1 B.()1,2 C.()2,3 D.()3,45.已知()1,3P 为角α终边上一点，则()()()()2sin πcos πsin 2π2cos αααα-++=++-（）A.17-B.1C.2D.36.已知33log 2a =，2log 5b =，3πcos 4c =，则（）A.a b c<< B.b c a << C.c a b<< D.b a c<<7.已知()33ln43xf x ax b x+=+--，若()26f =，则()2f -=（）A.14- B.14C.6- D.108.我国某科研机构新研制了一种治疗支原体肺炎的注射性新药，并已进入二期临床试验阶段.已知这种新药在注射停止后的血药含量()c t （单位：mg /L ）随着时间t （单位：h ）的变化用指数模型()0ektc t c -=描述，假定该药物的消除速率常数0.1k =（单位：1h -），刚注射这种新药后的初始血药含量03000mg /L c =，且这种新药在病人体内的血药含量不低于1000mg /L 时才会对支原体肺炎起疗效，现给某支原体肺炎患者注射了这种新药，则该新药对病人有疗效的时长大约为（）（参考数据：ln 20.693≈，ln 3 1.099≈）A.5.32hB.6.23hC.6.93hD.10.99h二、多选题：本题共4小题，每小题5分，共20分.在每小题给出四个选项中，有多项符合题目要求，全部选对的得5分，部分选对的得2分，有选错的得0分.9.如果0a b >>，那么下列不等式正确的是（）A.11a b< B.22ac bc < C.11a b b a+>+ D.22a ab b <<10.下列说法正确的有（）A.21x y x+=的最小值为2；B.已知1x >，则41y x x =+-的最小值为5；C.若正数x 、y 满足213x y+=，则2x y +的最小值为3；D.设x 、y 为实数，若223x y xy ++=，则x y +的取值范围为[]22-,.11.已如定义在R 上的函数()f x 满足()()0f x f x +-=，()()40f x f x ++=且对任意的1x ，[]22,0x ∈-，当12x x ≠时，都有()()()12120x x f x f x -⋅-<⎡⎤⎣⎦，则以下判断正确的是（）A.函数()f x 是偶函数B.函数()f x 的最小正周期是4C.函数()f x 在[]2,6上单调递增D.直线1x =是函数()1f x +图象的对称轴12.已知函数()2log ,04ππ2sin ,41666x x f x x x ⎧<<⎪=⎨⎛⎫-≤≤ ⎪⎪⎝⎭⎩，若方程()f x m =有四个不等的实根1x ，2x ，3x ，4x 且1234x x x x <<<，则下列结论正确的是（）A.02m <<B.121=x x C.()[)123422,x x x x ∞+++∈+ D.31x x 取值范围为()1,7三、填空题：本题共4小题，每小题5分，共20分.13.设()20243,0log ,0x x f x x x ⎧≤=⎨>⎩，则()()1f f =______.14.如果1sin 3α=-，α为第三象限角，则3πsin 2α⎛⎫-=⎪⎝⎭______.15.若()()11121a a ---<+，则实数a 的取值范围为______.16.我们知道，函数()f x 的图象关于坐标原点成中心对称的充要条件是函数()f x 为奇函数，由此可以推广得到：函数()f x 的图象关于点(),P a b 成中心对称的充要条件是函数()y f x a b =+-为奇函数，利用题目中的推广结论，若函数()2xn f x m =+的图象关于点10,2P ⎛⎫- ⎪⎝⎭成中心对称，则m n -=______.第Ⅱ卷四、解答题：共70分，解答应写出文字说明、证明过程或演算步骤.17.设集合{A x y ==，{}521B x m x m =-≤≤+.（1）若1m =时，求A B ⋃；（2）若x A ∈是x B ∈的充分不必要条件，求实数m 的取值范围.18.（1）求值：1ln 222314lg 25lg 2e log 9log 22+++-⨯（2）已知()tan π2α+=.求222sin sin cos cos αααα-⋅+的值.19.已知函数()πsin 23f x x ⎛⎫=-⎪⎝⎭.（1）求函数()f x 的周期以及单调递增区间；（2）求()f x 在区间π0,2⎡⎤⎢⎥⎣⎦上的最大值和最小值及相应的x 值.20.已知函数()21f x x mx =-+.（1）若关于x 的不等式()10f x n +-≤的解集为[]1,2-，求实数m ，n 的值；（2）求关于x 的不等式()()10f x x m m -+->∈R 的解集.21.已知()22xxf x a -=⋅-是定义域为R 的奇函数.（1）求实数a 的值；（2）判断函数()f x 在R 上的单调性，并利用函数单调性的定义证明；（3）若不等式()()92350xxf f t -++⋅-<在[]1,1x ∈-上恒成立，求实数t 的取值范围.22.已知函数()2log 1f x x =+，()22xg x =-.（1）求函数()()()()2123F x f x mf x m =--+∈⎡⎤⎣⎦R 在区间[]2,4上的最小值；（2）若函数()()()h x g f x =，且()()y h g x =的图象与()()243y g x n g x n =-⋅+⎡⎤⎣⎦的图象有3个不同的交点，求实数n 的取值范围.南充市2023—2024学年度上期普通高中年级学业质量监测数学试题注意事项：1.答卷前，考生务必将自己的姓名、准考证号填写在答题卡上.2.回答选择题时，选出每小题答案后，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，再选涂其他答案标号.回答非选择题时，将答案写在答题卡上.写在本试卷上无效.3.考试结束后，将答题卡交回.第Ⅰ卷一、单选题：本题共8小题，每小题5分，共40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.已知全集U =R ，{}26A x x =<<，{}04B x x =<≤，则()U B A ⋂=ð（）A.{}02x x <≤ B.{}02x x << C.{}0,2 D.∅【答案】A 【解析】【分析】应用集合的交补运算求集合.【详解】由题设{|2U A x x =≤ð或6}x ≥，故(){|02}U A B x x ⋂=<≤ð.故选：A2.命题“01x ∃>，20010x ax ++≤”的否定是（）A.1x ∀>，210x ax ++≤B.1x ∀>，210x ax ++>C.1x ∀≤，210x ax ++≤D.1x ∀≤，210x ax ++>【答案】B 【解析】【分析】由特称命题的否定是将存在改为任意并否定原结论，即可得答案.【详解】由特称命题的否定为全称命题知：原命题的否定为1x ∀>，210x ax ++>.故选：B3.函数()sin f x x x =⋅的部分图象可能是（）A. B.C. D.【答案】D 【解析】【分析】定义判断函数的奇偶性并结合π4f ⎛⎫⎪⎝⎭的符号，应用排除法即可得答案.【详解】由()sin()sin ()f x x x x x f x -=-⋅-==且定义域为R ，即函数为偶函数，排除A 、C ；由πππsin 0444f ⎛⎫=⋅>⎪⎝⎭，排除B.故选：D4.函数()2log 4f x x x =+-的零点所在的一个区间为（）A.()0,1 B.()1,2 C.()2,3 D.()3,4【答案】C 【解析】【分析】根据解析式判断单调性，结合零点存在定理确定区间.【详解】由解析式知()2log 4f x x x =+-在(0,)+∞上单调递增，又()130f =-<，()210f =-<，()23log 310f =->，所以零点所在的一个区间为()2,3.故选：C5.已知()1,3P 为角α终边上一点，则()()()()2sin πcos πsin 2π2cos αααα-++=++-（）A.17-B.1C.2D.3【答案】B 【解析】【分析】应用诱导公式及由弦化切化简目标式为2tan 1tan 2αα-+，结合三角函数的定义求得tan 3α=，即可求值.【详解】由()()()()2sin πcos π2sin cos 2tan 1sin 2π2cos sin 2cos tan 2αααααααααα-++--==++-++，又tan 3α=，所以2tan 12311tan 232αα-⨯-==++.故选：B6.已知33log 2a =，2log 5b =，3πcos 4c =，则（）A.a b c <<B.b c a <<C.c a b<< D.b a c<<【答案】C 【解析】【分析】利用对数函数的单调性及中间量0和2即可求解.【详解】因为333log 2log 8a ==，函数3log y x =在()0,∞+上单调递增，所以330log 8log 92<<=，即02a <<.又因为函数2log y x =在()0,∞+上单调递增，所以22log 5log 42>=，即2b >.又因为3πcos 042c ==-<，所以c a b <<.故选：C.7.已知()33ln43xf x ax b x+=+--，若()26f =，则()2f -=（）A.14- B.14C.6- D.10【答案】A 【解析】【分析】构造(x)(x)4g f =+并判断其奇偶性，利用奇偶性求()2f -即可.【详解】令33()()4ln3xg x f x ax b x+=+=+-，且定义域为()3,3-，3333()ln ln ()33x xg x ax b ax b g x x x-+-=-+=--=-+-，即()g x 为奇函数，所以()()()()80g x g x f x f x -+=-++=，即()(2)28(2)14f f f -+=-⇒-=-.故选：A8.我国某科研机构新研制了一种治疗支原体肺炎的注射性新药，并已进入二期临床试验阶段.已知这种新药在注射停止后的血药含量()c t （单位：mg /L ）随着时间t （单位：h ）的变化用指数模型()0ektc t c -=描述，假定该药物的消除速率常数0.1k =（单位：1h -），刚注射这种新药后的初始血药含量03000mg /L c =，且这种新药在病人体内的血药含量不低于1000mg /L 时才会对支原体肺炎起疗效，现给某支原体肺炎患者注射了这种新药，则该新药对病人有疗效的时长大约为（）（参考数据：ln 20.693≈，ln 3 1.099≈）A.5.32hB.6.23hC.6.93hD.10.99h【答案】D 【解析】【分析】由题设有103000e1000t-≥，利用指数函数单调性及指对数关系求解，即可得答案.【详解】由题意()103000e 1000t c t -=≥，则1ln 10ln 310.99103t t -≥⇒≤≈小时.故选：D二、多选题：本题共4小题，每小题5分，共20分.在每小题给出四个选项中，有多项符合题目要求，全部选对的得5分，部分选对的得2分，有选错的得0分.9.如果0a b >>，那么下列不等式正确的是（）A.11a b< B.22ac bc < C.11a b b a+>+ D.22a ab b <<【答案】AC 【解析】【分析】根据不等式性质判断A 、C 、D ；特殊值0c =判断B.【详解】由0a b >>，则22a ab b >>，110b a >>，故11a b b a+>+，A 、C 对，D 错；当0c =时22ac bc =，故B 错.故选：AC10.下列说法正确的有（）A.21x y x+=的最小值为2；B.已知1x >，则41y x x =+-的最小值为5；C.若正数x 、y 满足213x y+=，则2x y +的最小值为3；D.设x 、y 为实数，若223x y xy ++=，则x y +的取值范围为[]22-,.【答案】BCD 【解析】【分析】由0x <对应函数符号即可判断A ；应用基本不等式及其“1”的代换、一元二次不等式解法判断B 、C 、D ，注意取最值条件.【详解】A ：当0x <时，210x y x+=<，若存在最小值，不可能为2，错；B ：由10x ->，411151y x x =-++≥=-，当且仅当3x =时取等号，所以41y x x =+-的最小值为5，对；C ：由题设12112212(2)((5)(53333y x x y x y x y x y +=++=++≥+=，当且仅当1x y ==时取等号，所以2x y +的最小值为3，对；D ：22222()()3()4x y x y xy x y xy x y +=+-=++-+≥，可得2()4x y +≤，当且仅当1x y ==±时取等号，则22x y -≤+≤，故x y +的取值范围为[]22-,，对.故选：BCD11.已如定义在R 上的函数()f x 满足()()0f x f x +-=，()()40f x f x ++=且对任意的1x ，[]22,0x ∈-，当12x x ≠时，都有()()()12120x x f x f x -⋅-<⎡⎤⎣⎦，则以下判断正确的是（）A.函数()f x 是偶函数B.函数()f x 的最小正周期是4C.函数()f x 在[]2,6上单调递增D.直线1x =是函数()1f x +图象的对称轴【答案】CD 【解析】【分析】由题设()()f x f x -=-且()(4)f x f x =-+、()f x 在[]2,0-上递减，再进一步判断函数的奇偶性、周期性、区间单调性和对称性.【详解】由()()0()()f x f x f x f x +-=⇒-=-，函数为奇函数，A 错；由()()40()(4)(8)f x f x f x f x f x ++=⇒=-+=+，函数的周期为8，B 错；对任意的1x ，[]22,0x ∈-，当12x x ≠时，都有()()()12120x x f x f x ⎡⎤-⋅-<⎣⎦，所以()f x 在[]2,0-上递减，结合奇函数知：函数在[0,2]上递减，即函数[2,2]-上函数递减，由上可知()()(4)f x f x f x =--=-+，即()(4)f x f x -=+，故()f x 关于2x =对称，所以()f x 在[]26,上单调递增，且直线1x =是函数()1f x +图象的对称轴，C 、D 对.故选：CD12.已知函数()2log ,04ππ2sin ,41666x x f x x x ⎧<<⎪=⎨⎛⎫-≤≤ ⎪⎪⎝⎭⎩，若方程()f x m =有四个不等的实根1x ，2x ，3x ，4x 且1234x x x x <<<，则下列结论正确的是（）A.02m <<B.121=x x C.()[)123422,x x x x ∞+++∈+ D.31x x 取值范围为()1,7【答案】ABD 【解析】【分析】根据解析式画出函数大致图象，数形结合可得02m <<，且1234114713164x x x x <<<<<<<<<，结合对数函数、正弦型函数性质可得121=x x 、3420x x +=，综合运用基本不等式、区间单调性判断各项正误.【详解】由函数解析式可得函数大致图象如下，由上图，要使方程()f x m =有四个不等的实根1x ，2x ，3x ，4x 且1234x x x x <<<，则02m <<，且1234114713164x x x x <<<<<<<<<，3421020x x +=⨯=，由2122|log ||log |x x =，则212221212log log log ()01x x x x x x -=⇒=⇒=，A 、B 对；所以1234111202022x x x x x x +++=++≥+，又1114x <<，即等号取不到，所以()1234(22,)x x x x ∞+++∈+，C 错；由图知：()f x 在区间(1,14)、(4,7)上单调性相同，且1311,474x x <<<<，所以13,x x 随m 变化同增减，故31x x 取值范围为()1,7，D 对.故选：ABD【点睛】关键点点睛：根据解析式得到图象并确定02m <<，且1234114713164x x x x <<<<<<<<<为关键.三、填空题：本题共4小题，每小题5分，共20分.13.设()20243,0log ,0x x f x x x ⎧≤=⎨>⎩，则()()1f f =______.【答案】1【解析】【分析】根据分段函数的解析式，从内到外运算求解即可．【详解】由题意，()20241log 10f ==，则()()1f f =0(0)31f ==．故答案为：1．14.如果1sin 3α=-，α为第三象限角，则3πsin 2α⎛⎫-= ⎪⎝⎭______.【答案】3【解析】【分析】由平方关系及角所在象限得cos 3α=-，应用诱导公式即可求函数值.【详解】由1sin 3α=-，α为第三象限角，则cos 3α=-，33πsin cos 2αα⎛⎫-=-= ⎪⎝⎭.故答案为：315.若()()11121a a ---<+，则实数a 的取值范围为______.【答案】()1,2,12⎛⎫-∞-⋃-⎪⎝⎭【解析】【分析】利用函数1y x -=的单调性，分三类讨论即可求解.【详解】考虑函数1y x -=.因为函数1y x -=的单调递减区间为()0,∞+和(),0∞-.所以不等式()()11121a a ---<+等价于10210121a a a a -<⎧⎪+<⎨⎪->+⎩或者10210a a -<⎧⎨+>⎩或者10210121a a a a ->⎧⎪+>⎨⎪->+⎩，解得：2a <-或112a -<<.所以实数a 的取值范围为：()1,2,12∞⎛⎫--⋃-⎪⎝⎭.故答案为：()1,2,12∞⎛⎫--⋃- ⎪⎝⎭16.我们知道，函数()f x 的图象关于坐标原点成中心对称的充要条件是函数()f x 为奇函数，由此可以推广得到：函数()f x 的图象关于点(),P a b 成中心对称的充要条件是函数()y f x a b =+-为奇函数，利用题目中的推广结论，若函数()2x n f x m =+的图象关于点10,2P ⎛⎫- ⎪⎝⎭成中心对称，则m n -=______.【答案】2±【解析】【分析】由题设定义有()11[()]22f x f x -+=-+，进而得到22()2(21)20x x n m m mn n m ++++⋅++=恒成立，求参数值，即可得答案.【详解】由题意()12y f x =+为奇函数，所以()11[()]22f x f x -+=-+，则112222x x n n m m -=+++--，所以202(2221)(12)(2)122(12)(2)10x x x x x x x x x n n n m m m m m m m ⋅+⋅+++=⋅+++⋅++++⇒=⋅，所以22()2(21)20x x n m m mn n m ++++⋅++=恒成立，故2012101m n m m mn n +==-⎧⎧⇒⎨⎨++==⎩⎩或11m n =⎧⎨=-⎩，所以2m n -=±.故答案为：2±【点睛】关键点点睛：根据定义得到22()2(21)20x x n m m mn n m ++++⋅++=恒成立为关键.第Ⅱ卷四、解答题：共70分，解答应写出文字说明、证明过程或演算步骤.17.设集合{A x y ==，{}521B x m x m =-≤≤+.（1）若1m =时，求A B ⋃；（2）若x A ∈是x B ∈的充分不必要条件，求实数m 的取值范围.【答案】（1）{}45A B x x ⋃=-≤≤（2）[]2,3【解析】【分析】（1）先将集合A 化简，利用并集运算得解；（2）根据题意可得AB ，列式运算可求解.【小问1详解】由y =+，所以2050x x +≥⎧⎨-≥⎩，解得25x ≤≤，{}25A x x ∴=-≤≤，当1m =时，{}43B x x =-≤≤，{}45A B x x ∴⋃=-≤≤.【小问2详解】由题x A ∈是x B ∈的充分不必要条件，即A B ，则25521521m m m m -≥-⎧⎪≤+⎨⎪-≤+⎩（等号不同时取），解得23m ≤≤，所以实数m 的取值范围为[]2,3.18.（1）求值：1ln 222314lg 25lg 2e log 9log 22+++-⨯（2）已知()tan π2α+=.求222sin sin cos cos αααα-⋅+的值.【答案】（1）3；（2）75.【解析】【分析】（1）应用指对数运算性质及指对数关系化简求值；（2）由题设tan 2α=，再应用“1”的代换及齐次运算求值即可.【详解】（1）原式232lg 5lg 222log 3log 2523=+++-⨯=-=；（2）由()tan πtan 2αα+==，22222222222sin sin cos cos 2tan tan 1222172sin sin cos cos sin cos tan 1215ααααααααααααα-⋅+-+⨯-+-⋅+====+++.19.已知函数()πsin 23f x x ⎛⎫=- ⎪⎝⎭.（1）求函数()f x 的周期以及单调递增区间；（2）求()f x 在区间π0,2⎡⎤⎢⎥⎣⎦上的最大值和最小值及相应的x 值.【答案】19.π5ππ,π1212k k ⎡⎤-++⎢⎥⎣⎦，Z k ∈20.最大值为1，相应的5π12x =；最小值为2-，相应的0x =.【解析】【分析】（1）利用正弦型函数的周期公式即可求解函数的周期；利用整体代入法和正弦函数的性质即可求出函数的单调增区间.（2）利用整体代入法和正弦函数的性质即可求解.【小问1详解】由()πsin 23f x x ⎛⎫=-⎪⎝⎭可得：函数()f x 的周期为2ππ2T ==.令πππ2π22π,Z 232k x k k -+≤-≤+∈，解得：π5πππ,Z 1212k x k k -+≤≤+∈，∴()f x 的单调递增区间为π5ππ,π1212k k ⎡⎤-++⎢⎥⎣⎦，Z k ∈．【小问2详解】令π23t x =-，因为π0,2⎡⎤∈⎢⎣⎦x ，所以π2π,33t ⎡⎤∈-⎢⎥⎣⎦.所以当ππ232x -=，即5π12x =时，()f x 在区间π0,2⎡⎤⎢⎥⎣⎦上可取得最大值，最大值为1；当233x -=-ππ，即0x =时，()f x 在区间π0,2⎡⎤⎢⎥⎣⎦上可取得最小值，最小值为.故()f x 在区间π0,2⎡⎤⎢⎥⎣⎦上最大值为1，相应的5π12x =；最小值为2，相应的0x =.20.已知函数()21f x x mx =-+.（1）若关于x 的不等式()10f x n +-≤的解集为[]1,2-，求实数m ，n 的值；（2）求关于x 的不等式()()10f x x m m -+->∈R 的解集.【答案】（1）1,2m n ==-；（2）答案见解析.【解析】【分析】（1）由不等式解集可得1,2-是20x mx n -+=的两个根，利用根与系数关系求参数值；（2）由题意有()(1)0x m x -->，讨论1m <、1m =、1m >求不等式解集.【小问1详解】由题设20x mx n -+≤的解集为[]1,2-，即1,2-是20x mx n -+=的两个根，所以121,122m n =-+==-⨯=-.【小问2详解】由题意()21(1)()(1)0f x x m x m x m x m x -+-=-++=-->，当1m <时，解得x m <或1x >，故解集为(,)(1,)m -∞+∞ ；当1m =时，解得1x ≠，故解集为{|1}x x ∈≠R ；当1m >时，解得1x <或x >m ，故解集为(,1)(,)-∞+∞ m ；21.已知()22x xf x a -=⋅-是定义域为R 的奇函数.（1）求实数a 的值；（2）判断函数()f x 在R 上的单调性，并利用函数单调性的定义证明；（3）若不等式()()92350x x f f t -++⋅-<在[]1,1x ∈-上恒成立，求实数t 的取值范围.【答案】21.1a =22.单调递增，答案见解析23.(,∞-【解析】【分析】（1）利用奇函数的性质即可得出a 的值；（2）先判断单调性，再根据函数单调性的定义判断即可；（3）结合（2）的结论和奇函数的性质，不等式可转化为3t m m<+，利用基本不等式求出最值即可．【小问1详解】()f x 是R 上的奇函数，()()f x f x ∴-=-，对任意x ∈R ，即()2222x x x x a a --⋅-=-⋅-，即()()1220x x a --+=，对任意x ∈R 恒成立，10a ∴-=，即1a =.【小问2详解】()f x 为R 上的增函数，证明如下：任取1x ，2R x ∈，且12x x <，()()()1122122222x x x x f x f x ---=---()121212222222x x x x x x -=-+⋅()1212122122x x x x ⎛⎫=-+ ⎪⋅⎝⎭，12x x < ，1212122,1022x x x x ∴<+>⋅，()()120f x f x ∴-<，即()()12f x f x <，所以函数()f x 为R 上的增函数.【小问3详解】不等式()()92350x x f f t -++⋅-<在R 上恒成立，()()()929235x x x f f f t ∴--+=->⋅-，又()f x 为R 上的增函数，9235x x t ∴->⋅-在R 上恒成立，即()23330x x t -⨯+>，令3x m =，0m >，上式等价于230m tm -+>对0m >恒成立，即3t m m <+，令()3g m m m =+，只需()min t g m <即可，又()3g m m m =+≥()min g m ∴=，t ∴<.所以实数t的取值范围为(,∞-.22.已知函数()2log 1f x x =+，()22x g x =-.（1）求函数()()()()2123F x f x mf x m =--+∈⎡⎤⎣⎦R 在区间[]2,4上的最小值；（2）若函数()()()h x g f x =，且()()y h g x =的图象与()()243y g x n g x n =-⋅+⎡⎤⎣⎦的图象有3个不同的交点，求实数n 的取值范围.【答案】（1）答案见解析（2）25n ³【解析】【分析】（1）根据已知条件求出()[]()()222log 2log 13F x x m x m =-++∈R ，令2log x t =换元后()F x 变为2223y t mt m =--+，利用二次函数的性质确定最小值；（2）求出()2log 12222x h x x +=-=-，进而确定()()()22h g x g x =-，令()g x a =换元后有()()y h g x =化为22y a =-，()()243y g x n g x n ⎡⎤=-⋅+⎣⎦化为243y a na n =-+，问题转化为()242320a n a n -+++=有两个根，且一个根在()0,2内，一个根在[)2,+∞内，设()()24232a a n a n ϕ=-+++，通过限制二次函数根所在区间得出不等式，求解不等式即可解出实数n 的取值范围.【小问1详解】()()()()2123F x f x mf x m ⎡⎤=--+∈⎣⎦R ，所以()()()()222log 2log 13F x x m x m =-++∈R ，令2log x t =，因为[]2,4x ∈，则[]1,2t ∈，所以()F x 变为2223y t mt m =--+，函数的对称轴为t m =，当1m £时，函数在[]1,2上单调递增，1t =时，函数有最小值44m -；当12m <<时，函数在[]1,m 上单调递增减，函数在(],2m 上单调递增，t m =时，函数有最小值223m m --+；当2m ≥时，函数在[]1,2上单调递减，2t =时，函数有最小值67m -+.【小问2详解】()()()h x g f x =即()()2log 122220x h x x x +=-=->，所以()22y g x =-，令()g x a =，所以()()y h g x =化为：()220y a a =->，()()243y g x n g x n ⎡⎤=-⋅+⎣⎦化为243y a na n =-+；令22243a a na n -=-+，整理有：()242320a n a n -+++=；因为()22xa g x ==-，作出简图如下注意到0a >，可得：当02a <<时，22x a =-有两个根；当2a ≥时，22x a =-有一个根；因为()()y h g x =的图象与()()243y g x n g x n ⎡⎤=-⋅+⎣⎦的图象有3个不同的交点，所以()242320a n a n -+++=有两个根，且一个根在()0,2内，一个根在[)2,+∞内，设()()24232a a n a n ϕ=-+++，则有：()x ϕ为关于a 的二次函数，图象开口向上，对称轴为21a n =+，根据题意有：()()0020ϕϕ⎧>⎪⎨<⎪⎩，即320520n n +>⎧⎨-+<⎩解得25n >，或()()00200212n ϕϕ⎧>⎪=⎨⎪<+<⎩，即3205201122n n n ⎧⎪+>⎪-+=⎨⎪⎪-<<⎩解得25n =综上所述：25n ³.【点睛】方法点睛：①换元法的应用，注意取值范围；②数形结合的应用.。

四川省南充市第十中学2022年高二化学期末试题含解析

四川省南充市第十中学2022年高二化学期末试题含解析一、单选题（本大题共15个小题，每小题4分。

在每小题给出的四个选项中，只有一项符合题目要求，共60分。

）1. 下列各式中，属于正确的电离方程式的是A．HCO3－+H2O H2CO3+OH－B．HCO3－＋OH－= H2O + CO32－C．NH3+ H+ = NH4+ D．NH3·H2O NH4+ + OH－参考答案：D略2. LiFePO4电池具有稳定性高、安全、对环境友好等优点，可用于电动汽车。

电池反应为：FePO4+Li LiFePO4，电池的正极材料是LiFePO4，负极材料是石墨，含Li＋导电固体为电解质。

下列有关LiFePO4电池说法正确的是（）A．可加入硫酸以提高电解质的导电性B．放电时电池内部Li＋向负极移动C．充电过程中，电池正极材料的质量减少D．放电时电池正极反应为：FePO4+Li++e-=LiFePO4参考答案：CD略3. 25℃、101 kPa下，2g氢气燃烧生成液态水，放出285.8kJ热量，表示该反应的热化学方程式正确的是A．2H2(g)+O2(g) == 2H2O(1) △H＝―285.8kJ／molB．2H2(g)+ O2(g) == 2H2O(1) △H＝ +571.6 kJ／molC．2H2(g)+O2(g) == 2H2O(g) △H＝―571.6 kJ／molD．H2(g)+O2(g) == H2O(1) △H＝―285.8kJ／mol参考答案：D略4. 某有机物的结构简式如下，这种有机物不可能具有的性质是( )A．能使酸性KMnO4溶液褪色B．能发生酯化反应C．能跟NaOH溶液反应D．能发生水解反应参考答案：D略5. 用式量为43的烷基取代甲苯苯环上的一个氢原子，所得芳香烃产物的数目为（）A． 3种 B．4种 C． 5种 D．6种参考答案：D略6. 烃分子中若含有双键、叁键或环，则分子就不饱和，具有一定的“不饱和度”，其数值可表示为：不饱和度(Ω)＝双键数+叁键数×2+环数，例如的Ω=2，则有机物的不饱和度为A．5 B．6 C．7 D．8参考答案：B略7. 已知在25℃，101kPa下，lgC8H18（辛烷）燃烧生成二氧化碳和液态水时放出48.40kJ热量。

2020届南充十中高三英语下学期期末考试试卷及答案解析

2020届南充十中高三英语下学期期末考试试卷及答案解析第一部分阅读（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A、B、C、D四个选项中选出最佳选项A阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

The opening ceremony for the 2020 Tokyo Olympic Games was held at the Olympic Stadium in Tokyo on July 23, 2021 after a year of waiting due to the pandemic. Let's take a look at the highlights which make this opening ceremony unique.No spectatorsThere are no spectators during the opening ceremony in an effort to prevent the spread of the coronavirus infections. About 950 people, including officials and journalists, will watch in the main stadium, organizers said. Fewer athletes are expected to attend the ceremony because many are not allowed to stay for the entire Games due to COVID-19 restrictions.Male and female flag-bearersThe International Olympic Committee has actively encouraged all delegations toselect two flag-bearers at the opening ceremony, including one woman, as women's participation in the Tokyo Games reaches 48.8 percent, making it the most gender-balanced Olympics in the history of the event.Oath (宣誓) session updatedOne of the most symbolic parts of the opening ceremony—the Olympic oath—has been significantly adapted in order to “highlight the importance of solidarity, inclusion, non-discrimination and equality”. The number of oath-takers is also extended from three to six—two athletes, two coaches and two judges.Simplified ceremonyIn the 30-second video showing the rehearsal of the opening ceremony released to the public, the performances are integrated with dances, scenery and other display elements used in Japanese traditional festival activities.In order to prevent and control the COVID-19 pandemic and manage the cost, the Tokyo 2020 Organizing Committee said that the performances of the ceremony will be greatly simplified, with more light and shadow technology used instead of real decorations at the scene.1.Why isn't there any spectator during the opening ceremony?A.To limit the number of people present.B.To highlight the spirit of the Olympic Games.C.To control the spread of an infectious disease.D.To make room for the athletes all over the world.2.Why is each delegation encouraged to select one woman as a flag-bearer in Tokyo Olympics?A.Women will be in a leading position in sports.B.Women athletes make up a larger percentage than ever.C.Women will play a more important part in society.D.More and more women will take part in the Olympic Games.3.Which of the following statements is True according to the passage?A.Oath-takers are made up of six athletes.B.Tokyo uses more real decorations to cut the cost.C.About 950 people watch the entire games in the Tokyo Games.D.The opening ceremony presents the traditional culture of Japan.BAustralia’s Great Barrier Reef has lost 50% of its corals (珊瑚) within 30 years, with climate change a key driver of reef disturbance, a new study has found.Researchers from the ARC Centre of Excellence for Coral Reef Studies, inQueensland, northeasternAustralia, studied coral communities and theirsize along the length of theGreat Barrier Reefbetween 1995 and 2017, finding all coral populations disappear gradually, they said.Reefs are important to the health of ocean ecosystems — without them, ecosystems break down and ocean life dies.Coral population decreases happened in both shallow and deep water coral species, experts found, but branching and table-shaped corals — which provide habitats for fish — were worst affected by mass bleaching (漂白) events in 2016.Warm ocean temperatures are the main reason of coral bleaching. Bleaching doesn’t kill coral immediately, but if temperatures remain high, eventually the coral will die, destroying a natural habitat for many species of ocean life.“We used to think the Great Barrier Reef is protected by its huge size — but in fact our results show that even the world’s largest and ly well-protected reef system is increasingly destroyed and in decline,” Terry Hughes, anoutstanding professor at the ARC Centre of Excellence for Coral Reef Studies, said.“There is no time to lose — we must sharply decrease greenhouse gas emissions as soon as possible,” the reporter warned in the paper, published in the Proceedings of the Royal Society journal.4. What has mainly influenced the coral populations of theGreat Barrier Reef?A. Destroyed habitats.B. Climate change.C. Lack of seafood.D. Bleaching events.5. What can we learn from the passage?A. Many species has been dying out slowly.B. The size of reefs contributes to their protection.C. Ocean ecosystems don’t develop without reefs.D. Bleaching continually disturbs table-shaped corals.6. What attitude does the reporter hold to the present situation of theGreat Barrier Reef?A. Worried.B. Angry.C. Hopeful.D. Surprised.7. What is probably the best title for the passage?A. Climate change damages theGreat Barrier ReefB. The Species of ocean Life Are In DangerC. Greenhouse Gas Emissions Get WorseD. Sea Ecosystems Are In DeclineCAs I was walking home，a boy seemed to be singing a song in a very low voice，walking infront of me and carrying some of the same high school books I had with me.I caught up to him，and said “Hello”．I could tell he wasstartled，and dropped one of his books.I picked it up and as I handed it to him，he said “Thank you.” in a strange way，like witha strong accent.We soon began walking together and talking.It turns out he was in my science class，and I didn’t even know it!His name was Ahmad，and his family had just moved here this school year.He invited me into his house，and his family treated me like a special guest，which made me feel very welcome.He said hospitality (好客) is very basic to his culture，and strangers were always treated very kindly.His mom brought out some great food，and offered me some tea.Ahmad’s father and two sisters wanted to hearall about me and my family，and my schooling.Ahmad’s whole family had to leave their lifelong home because war had broken out，and it wasn’t safe thereanymore.They left with only what they could carry.His family was happy to feel safe，and they got used toAmerican culture quickly.They seemed pleased that Ahmad had brought a friend home to meet them.And as my friendship with Ahmad has continued，I now realize that the world is so much bigger than I thought！I also realize that your friends don’t have to be just like you.Differences make the world go round.8. What does the underlined word “startled” in Paragraph 1 mean?A. Excited.B. Moved.C. Surprised.D. Interested.9. Why was the writer treated like a special guest by Ahmad’s family?A. They liked strangers who came to their home for help.B. They wanted to know more information about the writer.C. Strangers were always treated very kindly in their culture.D. The writer was an American and knew much about their culture.10. Where does the writer probably come from?A. Canada.B. America.C. China.D. Australia.11. What can we learn from the passage?A. People from different countries can be good friends.B. Friends need different cultures and different accents.C. Your friends should have a lot of things the same with you.D. You can’t make friends with people from other countries.DFor centuries , tea has been used for far more than quenching thirst. Around the world people drink it to relax, reinvigorate and relieve, and it's something we need now more than ever.Even in the United States, a long coffee-dominated country, tea drinking is growing in popularity, with the country consuming 0.4 kilograms (14 ounces) of tea leaves per person a year compared with 0. 36 kilograms(12. 7 ounces) in 2007 according to the United Nations, as people switch away from soda，milk and fruit drinks.Scientists are beginning to look into just how tea might affect mood and cognition. Specifically, they're investigating whether its relaxing and refreshing effects are a direct biological outcome of the compounds in tea or whetherthey come from the context in which the drink is consumed—preparing your tea, choosing your favorite cup and sitting down for a brief break from the world. Or both.Drinking green tea has been found to improve brain function in healthy people, said Stefan Borgward, chair and director of the department of psychiatry and psychotherapy at the University of Lubeck, Germany.In a 2014 study, he gave one or two cups of green tea to 12 healthy volunteers and imaged their brains to analyze changes in connectivity inside certain brain regions.“We noticed an increased connectivity in regions of the brain associated with working memory,” he said via email.And a 2017 review of more than 100 studies he coauthored found that green tea can impact the brain in three ways: It can influence psychopathological state such as reducing anxiety; cognition by benefiting memory and attention; and brain function, specifically memory.That review concluded that "it would be desirable" for more Westerners to consume at least 100 milliliters(3.3 fluid ounces) of green tea each day “to protect neurocognitive function.”However, Borgward, cautioned that the effects aren't large, and the evidence is mainly provided by small-scale studies.12. How does the author introduce the tendency of drinking in the U.S.?A. By showing examples.B. By explaining reasons.C. By making a comparison.D. By checking existing facts.13. What is paragraph 3 mainly about?A. Scientists are looking into why tea makes people relaxed and refreshed.B. The context in which the drink is consumed is very important.C. People's relaxation is the direct biological outcome of the ingredients in tea.D. Preparing tea, choosing a cup and sitting down for a brief rest is amazing.14. What can we conclude from Stefan's research?A. Tea is a cure for a neurocognitive disease.B. Green tea is particularly beneficial to our memory.C. Drinking tea every day can prevent us from getting ill.D. Westerners drink less than 100 milliliters of green tea.15. What is the researcher'sattitude towards the finding?A. SupportiveB. Doubtful.C. Unclear.D. Objective.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

2020-2021学年南充十中高三语文上学期期末试卷及参考答案

2020-2021学年南充十中高三语文上学期期末试卷及参考答案一、现代文阅读（36分）(一)现代文阅读I(9分)阅读下面的文字,完成下面各小题。

沼泽地(日)芥川龙之介一个雨天的午后，我在某画展的一个房间里发现了一幅小油画。

说“发现”未免有些夸大，然而，惟独这幅画就像被遗忘了似的挂在光线最幽暗的角落里，框子也简陋不堪，所以这么说也未尝不可。

记得标题是《沼泽地》，画家不是什么知名的人。

画面上也只画着浊水、湿土以及地上丛生的草木。

恐怕对一般的参观者来说，是名副其实的不屑一顾吧。

而且奇怪的是，这位画家尽管画的是郁郁葱葱的草木，却丝毫也没有使用绿色。

芦苇、白杨和无花果树，到处涂着混浊的黄色，就像潮湿的墙上一般晦暗的黄色。

莫非这位画家真的把草木看成这种颜色吗？也许是出于其他偏好，故意加以夸张吧？——我站在这幅画前面，一边对它玩味，一边不由得心里冒出这样的疑问。

我越看越感到这幅画里蕴蓄着一股可怕的力量。

尤其是前景中的泥土，画得那么精细，甚至使人联想到踏上去时脚底下的感觉。

这是一片滑溜溜的淤泥，踩上去噗哧一声，会没脚脖子。

我在这幅小油画上找到了试图敏锐地捕捉大自然的那个凄惨的艺术家的形象。

正如从所有优秀的艺术品感受到的一样，那片黄色的沼泽地上的草木也使我产生了恍惚的悲壮的激情。

说实在的，挂在同一会场上的大大小小、各种风格的绘画当中，没有一幅给人的印象强烈得足以和这幅相抗衡。

“很欣赏它呢。

”有人边说边拍了一下我的肩膀。

我觉得恰似心里的什么东西给甩掉了，就猛地回过头来。

“怎么样，这幅画？”对方一边悠然自得地说着，一边朝着《沼泽地》这幅画努了努他那刚刮过的下巴。

他是一家报纸的美术记者，向来以消息灵通人士自居，身材魁梧，穿着时新的淡褐色西装。

这个记者以前曾经给过我一两次不愉快的印象，所以我勉强回答了他一句：“是杰作。

”“杰作——吗？这可有意思啦。

”记者捧腹大笑。

大概是被他这声音惊动了吧，左边看画的两三个人不约而同地朝这边望了望。

南充十中新人教版数学九年级上册期末测试题

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小李通过多次摸球试验后发现其中摸到红色、黑色球的频率稳定在15%和45%，则口袋中白色球的个数很可能是（）A ．6B ．16C ．18D ．248.将抛物线y=5x 2向左平移2个单位，再向下平移3个单位，得到的抛物线是 ( ) A ． y=5(x+2)2+3 B. y=5(x+2)2-3 C.y=5(x-2)2+3 D. y=5(x-2)2-39．已知二次函数y =2x 2+8x +7的图象上有有点A 1(2)y -，，B 21(5)3y -，，C 31(1)5y -，，则 y 1、y 2、y 3的大小关系为( ) A ． y 1 > y 2> y 3 B ． y 2> y 1> y 3 C ． y 2> y 3> y 1 D ． y 3> y 2> y 110．已知⊙O 的半径为1，点P 到圆心O 的距离为d ，若关于x 的方程x 2－2x ＋d =0有实根，则点P ( )．A ．在⊙O 的内部B ．在⊙O 的外部C ．在⊙O 上D ．在⊙O 上或⊙O 的内部11、如图，为二次函数2y ax bx c =++的图象，给出下列说法： ①0ab <；②方程20ax bx c ++=的根为1213x x =-=，；③0a b c ++>；④当1x >时，xy o x y oxy o x yo 11-1-1AB CD y 随x 值的增大而增大⑤当0y >时， 13x -<<．其中，正确的说法有（ )个 A. 2 B. 3 C. 4 D. 512、如果函数y=kx+b 的图象经过第一、二、三象限，那么函数y=kx 2+bx-1的图象大致是（）二．填空题（每题3分，共18分）13．与点P(2，－4)关于中心对称的点的坐标为___________ 14. 已知二次函数y=-x 2+4x+5的最大值为_____________15.如图，AC 是⊙O 的直径，∠1=46°，∠2=28°，则∠BCD =______．C '16、如图，Rt A BC ''△是由Rt ABC △绕B 点顺时针旋转而得，且点A B C '，，在同一条直线上，在Rt ABC △中，若90C =∠，2BC =，4AB =，则斜边AB 旋转到A B '所扫过的扇形面积为，点A 在旋转过程中走过的路线长是 17．如图，在Rt △ABC 中，∠C=90°，CA=CB=2.分别以A 、B 、C 为圆心，以21AC 为半径画弧，三条弧与边AB 所围成的阴影部分的面积是。

2021年南充十中高三英语期末考试试题及参考答案

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Then Rishab learned about how deadly pancreatic cancer is, and that its low survival rate is due to how difficult it is to treat. "I'm also into programming, so I was learning about AI technology. I decided to try to solve a real-world problem using it."His winnings have been put in further research and in his nonprofit Samyak Science Society, which helps poor children enter the STEM (science, technology, engineering and math) education. Rishab is also raising awareness about pancreatic cancer. These efforts make him quite different from teenagers of his age. Considering becoming a biomedical engineer or a doctor一or both, he has also put some money aside to further his own learning. Almost certainly the doors of higher education will open wide to him before he even knocks.That's an outstanding outlook for one so young. Rashib is committed to helping very sick people in need. He is also providing teenagers of his age with a much-needed model of what kinds of things youth can achieve.1. What can we learn about the 3M Young Scientist Challenge in 2018?A. It was intended to solve medical problems.B. It was a nationwide AI competition for teenagers.C. It offered the finalists an opportunity to work with scientists.D. It allowed the finalists to learn AI technology in the 3M center.2. How did Rishab win the 3M Young Scientist Challenge?A.He showed excellent programming ability.B. He figured out the survival rate of pancreatic cancer.C. He introduced poor children to STEM education.D. He applied AI technology to treating pancreatic cancer.3. Which of the following best describes Rishab?A. Talented and caring.B. Independent and humorous.C. Responsible and patient.D. Polite and inspiring.BStarting at university or college can be a big challenge, especially if you’re living away from home for the first time. You arefaced with big questions such as, “Who’s going to do my washing?” “Who’s going to tidy my room?” And, most importantly, “How am I going to eat?” Yes, living on your own means cooking for yourself, and when you’re living a student lifestyle, this could be a recipe for disaster.Students, in the UK at least, often rely on generally available food such as baked beans or cheese on toast. And for the more adventurous, there’s “spag bol” — spaghetti bolognaise(肉酱意粉), that is, cooked spaghetti served with a ground beef and tomato sauce — a budget-friendly solution. If you make a huge pan of it, it can probably last you a whole week! Other low-cost options include jar sauces and oven pizzas.Recently, a British supermarket suggested that rose harissa paste, organic cider vinegar and Swiss bouillon powder were the important food materials needed for the “student cupboard”. But are these items considered essential and affordable for someone on a budget?As a matter of fact, living on a budget is certainly one barrier to eating a well-balanced diet. What’s more, some young people don’t know much about cooking, and for many young students, there are more fun things to go and do than just stay inside and cook. That’s where takeaways and microwave meals come in.What should a health-conscious student really have in his or her food cupboard? Jack Monroe, a food writer and campaigner, has words to say: baked beans, lemon juice, canned tomatoes and tomato ketchup, described as “salt, sugar, vinegar and tomato all in one handy squeezy bottle”. And should that not appeal, you can always wait till your next visit to your mum and dad for a square meal!4. What does the author indicate by “this could be a recipe for disaster”?A. Cooking is difficult for a student.B. Students must cook if they live alone.C. It is important to live independently.D. Learning to cook will cause disasters.5. What is the feature of “spag bol”?A. It is delicious.B. It is healthy.C. It saves money.D. It needs littleskill.6. What is paragraph 4 mainly about?A. How well-balanced diets can be realized.B. How students can eat healthily with limited money.C. Why living on a budget is common among students.D Why students choose takeaways and microwave meals.7. Why does the author write the last paragraph?A. To advocate visiting parents.B. To offer some tips.C. To promote health consciousness.D. To introduce a writer.CDisease-carrying mosquitoes can spread diseases without affecting themselves. Nearly 700 million people get a mosquito-borne illness each year, which results in over one million deaths. Humans experience continuous pressures from disease-carrying mosquitoes in many parts of the world, so we have to find ways to fight against those insects because they keep getting scarier.Even though DEET remains the most commonly used, and most powerful, mosquito repellent ever developed, scientists are actively pursuing effective products based entirely on plant oils. While DEET is an effective contact repellent, many people dislike the oily feel and smell on their skin, and sometimes some people are sensitive to it. Consumers are always interested in alternatives to DEET and other synthetic repellents, so there are numerous natural repellents on the market.In his lab atIowaStateUniversity, Dr. Joel Coats and his team have successfully tested these repellents against three species of dangerous mosquitoes. The first group of the new repellents act through the air. These chemicals have a vapor action that provides protection, and they are called “spatial” repellents, since they act through space. These are potentially most useful in backyards, parks, and houses. The other group are the classic ones that stop insects from standing on a treated surface, such as human skin, clothing or tents; collaborators at the USDA-ARS and BioGents have conducted testing with humans to confirm the effectiveness and identify the very best ones.The new repellents were designed and made from the natural materials in plant essential oils. They maintain many of the advantages of the natural repellents: They are fully biodegradable, with no ecological concerns or environmental wastes, and generally considered safe like the thousands of types of plant essential oils used in the flavor and perfume industries. However, thorough testing will be conducted to determine if they are truly non-poisonous because there is still no enough evidence.8. What does the author mainly want to show in paragraph 1?A. The way mosquitoes spread disease.B. The high death rate of mosquito-borne illness.C. The difficulty of fighting disease-carrying mosquitoes.D. The urgency of finding tools to fight against mosquitoes.9. What is a disadvantage of DEET?A. It won’t be effective for long.B. It can’t be applied universally.C. It causes discomfort to the users.D. It greatly harms people’s health.10. What can we learn about the second group of the new repellents?A. They can kill mosquitoes indirectly.B. They are mainly used in the open air.C. They are more effective on human skin.D. They can prevent mosquitoes from contacting users.11. What’s the author’s attitude to the new repellents?A. Subjective.B. Objective.C. Doubtful.D. Disapproving.DAddiction to smartphones will result in poor sleep, according to a new study.The study, published Tuesday in Frontiers in Psychiatry, looked at smartphone use among 1,043 students between the ages of 18 and 30at King's College London. Researchers asked the students to complete two questionnaires on their sleep quality and smartphone use, in person and online.Using a 10-question scale that was developed to judge smartphone addiction in children, nearly 40% of the university students qualified as "addicted" to smartphones, the study found. “Our findings are in agreement with other reported studies in young adult populations globally, which are in the range of 30-45%,” lead author Sei Yon Sohn and her co-authors wrote in the study. "Later time of use was also significantly connected with smartphone addiction, with use after 1 a.m. increasing a 3- times risk," the authors wrote.Students who reported high use of smartphones also reported poor sleep quality, the study found. That foils in line with previous studies that have found overuse of smartphones at night to be associated with trouble falling asleep, reduced sleep duration (睡眠持续时间)and daytime tiredness. That's likely because use of smartphones close to bedtime has been shown to delay the body's normal sleep - and - wake clock.In fact, the No. 1 rule is "no computers, cell phones, and ipads in bed and at least one hour beforebed Dr. Vsevolod Polotsky, who directs sleep basic research, said in a recent interview. That's because "any LED light source from electronics (电子设备)may further hold back melatonin (褪黑激素)levels," Polotsky said. Melatonin is often referred to as a "sleep hormone," because we sleep better during the night when levels reach the top.“This is a cross-sectional study, and it cannot lead to any firm conclusions about smartphone use as the cause of reduced sleep quality, said Bob Patton, a lecturer in clinical psychology at the University of Surrey, via email.12. How did Sei Yon Sohn's team begin their study?A. By publishing researching papers.B. By responding to others’ concern.C. By collecting firsthand data.D. By turning to related experts.13. What did the study find about sleep quality and smartphone use?A. 30-45% of the university students are addicted to smartphones.B. High use of smartphones is related to poor sleep quality.C. Overuse of smartphones leads to shorter sleep duration.D. Use after 1 a.m. will result in smartphone addiction.14. What is Polotsky's opinion on electronics ?A. We should stop using them an hour before going to sleep.B. LED light source from them will delay normal sleep- and- wake clock.C. Reduced sleep quality has nothingto do with them.D. No electronics should be used in bed at any time.15. What can be a suitable title for the text?A. Say No to SmartphonesB. Sleep Quality Can Be ImprovedC. LED Light Source Causes Great HarmD. Smartphone Addiction Ruins Sleep第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

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2020届南充十中高三英语期末考试试卷及参考答案

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They will be at your level, studying what you need and what interests you.Packages10 Classes Package $ 229.90Interested in taking 10, 55 - minute conversation English classes?Schedule a first free class with LOI English and talk to the teacher about it. After that, you can arrange to take our 10 - class conversation English course.20 Classes Package $ 439,80Interested in taking 20, 55 - minute conversation English classes?Schedule a first free class with LOI English and talk to the teacher about it. After that, you can arrange to take our 20 - class conversation English course.1. What do the classes mainly focus on?A. Daily conversations.B. Work - related topics.C. Grammar rules.D. Area - based accents.2. Which is NOT offered to the students?A. Native English - speaking teachers.B. Personalized courses.C. Choice of class time and teacher.D. Offline learning materials.3. What should a student do first if he decides on either of the packages?A. Arrange a free class with LOI English.B. Bargain with LOI English for lower fees.C. Choose an experienced LOI English teacher.D. Make a promise to sit through each class.BIf our kids don’t fall, they don’t learn to get up. I still remember the day in high school that my mom forgot to pick me up from school. I’m the oldest of four children, and no doubt she’d had a long day with the other kids and it’d slipped her mind. After waiting at school for an hour, I walked the three miles home, and when I got to my house, I shut our front door with anger, stormed into the kitchen and screamed in my mom’s face that she’d forgotten me.Later that night, my dad told me I no longer had a ride to school the next day. I figured my mom would still take me, but when the morning came, she refused. It was midterm, and as a straight-A student ready to start college applications, being late wasn’t an option (选择). In my mind, missing these tests would have been the end of my academic career. I begged my mom. I told her she was ruining my future and everything I’d worked for. But sheheld her ground, and that day, I walked to school. And I missed my tests.My mom didn’t rescue me from failure. She let me suffer from it. She let me figure it out. She let me learn. Now, as a mom myself, I’ve realized that I want my kids to experience failure because failure is how we grow, learn and think outside of ourselves. It’s how we self-educate to learn what’s right and respectable, and what’s not. It’s how we become responsible and enthusiastic. Falling down makes us better because we learn how to get up.4. What is one of the reasons that the author got angry that day?A. She was tired.B. She failed in a test.C. She was late for school.D. She had to walk home by herself.5. How does the author feel about her childhood experience?A. Terrible.B. Meaningful.C. Embarrassing.D. Colorful.6. The underlined phrase “held her ground” in Paragraph 2 probably means “________”.A. gave in to meB. said yes to meC. stayed in the placeD. kept to her idea7. What is the best title for the text?A. My Way of GrowingB. The Value of FailureC. My Love for MotherD. Failure in My LifeCIs renting clothes greener than buying them? Sustainable (可持续的) fashion expert Elizabeth Cline isn’t sure. Clothing renting is a hot new industry and businessmen are trying to attract shoppers who care about the environment. Last summer alone,Urban Outfitters, Macy’s, Bloomingdale’s American EagleandBanana Republicall announced renting services – a sure sign of changing times.But is renting fashion actually more environmentally-friendly than buying it? And if so, how much more? Journalist and author Elizabeth Cline researched this question in a feature article for Elle, and she concluded that it’s not as sustainable as it seems.Take shipping for example, which has to go two ways if an item is rented – receiving and returning. Cline writes that consumer transportation has the second largest carbon footprint of our collective fashion habit after manufacturing.Then there’s the burden of washing, which has to happen for every item when it’s returned, regardless of whether or not it was worn. For most renting services, this usually means dry-cleaning, which is a polluting process. All the renting services that Cline looked into have replaced perchloroethylene, a carcinogenic (致癌的) air pollutants that’s still used by 70 percent of US dry cleaners, with hydrocarbon (碳氢化合物) alternatives, although these aren’t great either. They can produce harmful waste and air pollution if not handled correctly.Lastly, Cline fears that renting services will increase our appetite for fast fashion, simply because it’s so easily accessible. There’s something called “share-washing” that makes people have more wasteful behaviors because a product or service is shared and thus is considered more eco-friendly. Uber is one example of this: advertised as a way to share rides and reduce car ownership, and yet it has been proven to discourage walking, bicycling and public transportation use.Renting clothes is still preferable to buying them cheap and throwing them into the bin after wearing them a few times, but we shouldn’t let the availability of these services make us self-satisfied. There’s an even better step – and that’s wearing what we already have.8. What do we know about Elizabeth Cline from the passage?A. She is trying to attract shoppers.B. She is an expert and journalist.C. She has created “share-washing”.D. She never rents clothes.9. Why does renting services increase people’s appetite for fast fashion?A. Because it is handled correctly.B. Because it is transported easily.C. Because it is fairly eco-friendly.D. Because it is easily accessible.10. What can we infer from the passage?A. Clothing renting became popular ten years ago.B. Consumer transportation has the largest carbon footprint.C. Renting clothes deserves further consideration.D. Uber is a good example of sharing rides.11. Which section of a newspaper does the text probably come from?A. Environment.B. Technology.C. Travel.D. Medicine.DA man in Indonesia is walking backwards for 435 miles. He's making the trip to encourage the government and others to value and protect Indonesia's rainforests.Medi Bastoni is 43 years old. He is an Indonesian. Indonesia is a large country in the world formed by a group of islands. There are over 16, 000 islands there，and most of them are covered with rainforests. But on Java, where Mr. Bastoni lives, far more forests have been cleared.Mr. Bastoni believes it's important to protect forests from being cut down, and to restore (恢复) them when they have been destroyed. Near his home, Mount Wilis is now being restored, but Mr. Bastoni wants to make the protection continue. That's how he came up with the idea of the 435-mile walk.And walking backwards? Mr. Bastoni wants Indonesians to look back at their past. Walking backwards is a good way to get attention. Right now, Mr. Bastoni's backward walk is pretty big news in Indonesia.Mr. Bastoni is wearing a frame(框架)that supports a large mirror in front of him, above his head. This allows Mr. Bastoni to look behind him while walking backwards. Besides, Mr. Bastoni is carrying a backpack with some clothes and a little food. He is planning on buying more meals from restaurants along the way. He has been sleeping at police stations, security posts, and even strangers homes during the trip. His plan is to cover about 19 miles a day. In early August he was in Sragen -- about 100 miles from his home. It's not clear whether Mr. Bastoni is still on track to arrive in Jakarta by August 17.12. What do we know about rainforests in Indonesia?A. Indonesia has the largest area of rainforests in the world.B. The loss of rainforests is getting serious on Java.C. The islands there are all covered by rainforests.D Local people pay great attention to rainforests.13. Why did Mr Bastoni want to take the 435-mile walk?A With the purpose of fighting climate change.B. With the aim of becoming a healthy person.C. With the hope of rebuilding rainforests.D. With deep love for traditional sports.14. What's the function of the large mirror?A. To make sure of Mr. Bastoni's safety.B. To show Mr. Bastoni's position correctly.C. To allow Mr. Bastoni to look forwards easily.D. To help Mr. Bastoni enjoy views on the road.15. What can be the best title for the text?A. The difficulty of protecting rainforests in Indonesia.B. The importance of rainforests to Indonesia.C. A trip to recall history and attract attention.D. A walking backwards trip to save rainforests.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

2019-2020学年南充十中高三英语期末考试试卷及参考答案

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I knew 1 would not be able to hold it for long.Even so, this was a fight I had to win: I was all that stood between the bear and my family, who would stand little chance of running faster than a brown bear.The bear hit at the camera, cutting it off the tripod. I raised my left arm to protect my face; the beast held tightly on the tripod and pressed it into my side. My arm could not move, and I sensed that my bones were going to break.Drawing back my free hand, I struck the bear as hard as I could for five to six times. The bear opened its mouth and I grasped its fur, trying to push it away. I was actually wrestling with the bear at this point. Then, as suddenly as it had begun, the fight ended. The bear moved back towards-the forest,before returning for another attack the first time I felt panic.Obviously satisfied that we caused no further threat, the bear moved off, destroying a fence as it went. My arm was injured, but the outcome for us could hardly have been better. I'm proud that my family remained clear-headed when panic could have led to a very different outcome.1. How did the writer feel when faced with the brown bear?A. Fearful but confident.B. Nervous but brave.C. Upset but determined.D. Awful but hopeful.2. The bear finally went away after itA. got injuredB. felt safeC. found some foodD. took away the camera3. What does the author want to tell us?A. We should keep calm when troubles comeB. We should rise to the challenge when faced with difficulties.C. We should not risk ourselves in some dangerous areas.D. We should learn to take advantage of anything at hand when in trouble.BA growing body of research is revealing associations between birth defects (缺陷) and a father's age, alcohol use and environmental factors, say researchers atGeorgetown University Medical Center. They say these defects result from epigenetic changes that can potentially affect multiple generations.The study, published in theAmerican Journal of Stem Cells, suggest both parents contribute to the health status of their offspring — a common sense conclusion which science is only now beginning to demonstrate, says the study's senior investigator, Joanna Kitlinska, PhD, an associate professor in biochemistry, and molecular and cellular biology.“We know the nutritional, hormonal and psychological environment provided by the mother permanently influences organ structure, cellular response and gene expression in her offspring,” she says.“But our study shows the same thing to be true with fathers — his lifestyle, and how old he is, can be reflected in molecules that control gene function,” she says. “In this way, a father can affect not only his immediate offspring, but future generations as well.”For example, a newborn can be diagnosed with fetal (胎儿的) alcohol spectrum disorder (FASD), even though the mother has never consumed alcohol, Kitlinska says. “Up to 75 percent of children with FASD have biological fathers who are alcoholics, suggesting that preconceptual paternal alcohol consumption negatively impacts their offspring.”Advanced age of a father is correlated with elevated rates of certain diseases, and birth defects in his children.A limited diet during a father’s preadolescence has been linked to reduced risk of cardiovascular death in his children and grandchildren. Paternal obesity is linked to enlarged fat cells, changes in metabolic regulation, diabetes, obesity and development of brain cancer. Psychosocial stress on the father is linked to defective behavioral traits in his offspring. And paternal alcohol use leads to decreased newborn birth weight, marked reduction in overall brain size and impaired cognitive function.“This new field of inherited paternal epigenetics needs to be organized into clinically applicable recommendations and lifestyle alternations,” Kitlinska says. “And to really understand the epigenetic influences of a child, we need to study the interplay between maternal and paternal effects, as opposed to considering each in isolation.”4. What’s the message the writer conveys in the passage?A. Both parents contribute to the health status of their offspring.B. Father’s age and lifestyle are tied to birth defects.C. Father plays a more critical role in birth defects.D. Birth defects can potentially affect multiple generations.5. What can we infer from the example in Paragraph 5?A. FASD can only be diagnosed in a newborn whose father is addicted to alcohol.B. A newborn will not contract FASD if his mother has never consumed alcohol.C. A father’s lifestyle can negatively impact his offspring.D. Most children have biological fathers who are alcoholics.6. Which of the following situations is less likely to lead to children’s birth defects?A. Having a father with a limited diet.B. Having a father who is an alcoholic.C. Having an overweight father.D. Having a father with psychosocial stress.7. What will the research probably continue to focus on in the part that follows?A. The maternal epigenetic influences of a child.B. The ways to avoid negative paternal influence on children.C. The clinical application of the research findings.D. The interaction between maternal and paternal effects.CFor decades, an organization, called Ulum Dalska, based in a small Swedish town called Alvdalen, hasbeen working hard to help save a language called EIfdalian. Elfdalian sounds nothing like the country's national language, Swedish, which press secretary Bjorm Rehnstrom said affected the language about 100 years ago. At that point, Elfdalian declined. Ulla Schitt, also a Ulum Dalska member, experienced the change while growing up in Alvdalen.“My parents spoke Efdalian with each other, and with my grandma and my aunts and uncles and everyone around,”Schit said. “But when they turned to me, they spoke Swedish.” Schitt said her parents spoke Swedish with her because that's what was spoken in schools.But people are getting creative in the fight to change that trend. Musicians are creating new songs with Elfdalian. Several children's books were also translated into EIfdalian, including Le Petit Prince by Antoine de Saint-Exupery. Additionally, Bjorm Rehnstrom helps run a popular Facebook group that offers courses in the Elfdalian language, where he offers lessons to the group's 1,800 global members from America, Australia, South America, Indonesia, Haiti and Cape Verde.The local government supports the teaching and preservation of Elfdalian. Bjom Rehnstrom said they eagerly paid for a sign that reads: “Welcome to Alvdalen” in Elfdalian. But the national government of Sweden is a different story. They currently consider Eidalian a dialect of Swedish, not its own language.Schitt said every time a language dies it is a sad moment. To her, losing Elfdalian would be an especially tragic (悲剧的) loss. “It's a part of our identity. It's part of our culture,” she said. “And if part of your identity and culture dies, a part of yourself dies.” Getting Elfdalian recognized as a language by the Swedish government, she added, is key to making sure that death doesn't come.8. Why was Ulum Dalska founded?A. To teach Swedish.B. To save Elfdalian.C. To improve Alvdalen.D. To help schools.9. Why Schitt's parents spoke Swedish with her?A. They could only speak Swedish fluently.B. Schitt longed to speak Swedish at home.C. Swedish was the language of schools.D. It was required by her school teachers,10. What can we infer from paragraph 4?A. Many people are trying to help to save Elfdalian.B. Songs in Elfdalian are becoming more popular.C. Le Petit Prince was translated into various languages.D. Courses in Eldalian are provided to the world freely.11. What does Schitt think of preserving Elfdalian?A. Satisfactory.B. Vital.C. Dangerous.D. Meaningless.DOne billion people in the world are short of water. How can this problem be solved. Some suggestions have been to desalinate ocean water or to build enormous water pipelines from areas where water is abundant. (Suggestions such as these prove extremely expensive when they are actually used.) One possibility that scientistsare considering is pulling icebergs from either the North Pole or the South Pole to parts of the world with a water shortage. Although many questions must be answered before such a project could be tried, moving icebergs seems a reasonable possibility in the future.Engineers, mathematicians, and glaciologists from a dozen countries have been considering the iceberg as a future source of water. Saudi Arabia is particularly interested in this project because it has a great water shortage. Scientists estimate that it would take 128 days to transport a large iceberg (about 1/2 square mile) to Saudi Arabia. Yet the iceberg would be completely melted by the 104th day. Therefore, insulation would be essential, but how to insulate the iceberg remains an unsolved problem.The problems in transporting an iceberg are numerous. The first problem is choosing the iceberg to pull. The icebergs that form in the North Pole are quite difficult to handle because of their shape. Only a small portion extends above the water — most of the iceberg is below the surface, which would make it difficult to pull. South Pole icebergs, on the other hand, are flat and float like table tops. Thus they would be much easier to move.How can a 200-million-ton iceberg be moved. No ship is strong enough to pull such enormous weight through the water. Perhaps several ships could be used. Attaching ropes to an iceberg this size is also an enormous problem. Engineers think that large nails or long metal rods could be driven into the ice. What would happen if the iceberg splits into several pieces during the pulling. Even if an iceberg with very few cracks were chosen, how could it be pulled through stormy waters. Furthermore, once the iceberg reached its destination, very few ports would be deep enough to store it.All of these problems must be solved before icebergs can become a reasonable source of water. Yet scientists estimate that it will be possible to transport them in the near future. Each year, enough icebergs form to supply the whole world with fresh water for a full year. In addition, icebergs are free and nonpolluting. As a solution to the world’s water problems, icebergs may be a workable possibility.12. What is a problem in transporting iceberg?A. The size of the iceberg.B. The colour of the iceberg.C. The salt in the iceberg.D. The movement of air and water.13. What is the author’ attitude towards transporting iceberg?A. Pessimistic.B. Objective.C. Optimistic.D. Unconcerned.14. What does the last paragraph mainly tell us?A. It is hard to use iceberg.B. Iceberg are a good choice.C. There are problems with iceberg.D. Man finds no other ways to solve water shortage.15. What can be a suitable title for the text?A. Shortage of water.B. Icebergs for water.C. Scientists and icebergs.D. Iceberg—scientists headache.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

四川省南充市第十中学2020-2021学年高二数学理上学期期末试卷含解析

四川省南充市第十中学2020-2021学年高二数学理上学期期末试卷含解析一、选择题：本大题共10小题，每小题5分，共50分。

在每小题给出的四个选项中，只有是一个符合题目要求的1. 函数的定义域为，对定义域中任意的，都有，且当时，，那么当时，的递增区间是（）Ａ．Ｂ．Ｃ．Ｄ．参考答案：C略2. 双曲线-=1的两条渐近线互相垂直，那么它的离心率为( )A．B．C．2 D．参考答案：A3. △ABC的内角A，B，C所对的边分别为a，b，c，根据下列条件解三角形，其中有两个解的是（）A. b=6，A=30°，C=60°B. b=3，c=2，B=60°C. a=7，b=5，A=60°D. a=3，b=4，A=45°参考答案：D4. 设函数，若f(－4)＝f(0)，f(－2)＝－2，则关于x的方程f(x)＝x的解的个数为A．1B．2C．3D．4参考答案：C略5. 交通管理部门为了解机动车驾驶员（简称驾驶员）对某新法规的知晓情况，对甲、乙、丙、丁四个社区做分层抽样调查。

假设四个社区驾驶员的总人数为，其中甲社区有驾驶员96人。

若在甲、乙、丙、丁四个社区抽取驾驶员的人数分别为12,21,25,43，则这四个社区驾驶员的总人数为（）A、101B、808C、1212D、2012参考答案：B6. 设等差数列的前n项和为，若,则（）A 63B 45 C36 D 27参考答案：B7. 下列命题正确的是（1）命题“，”的否定是“，”；（2）l为直线，，为两个不同的平面，若，，则；（3）给定命题p，q，若“为真命题”，则是假命题；（4）“”是“”的充分不必要条件．A. （1）（4）B. （2）（3）C. （3）（4）D. （1）（3）参考答案：D【分析】逐个命题进行判定，对于（1）结合全称命题的否定方法可以判定；对于（2）要考虑全面直线与平面的位置关系；对于（3）根据复合命题的真假进行判断；对于（4）利用可以判定.【详解】对于（1）“，”的否定就是“，”，正确；对于（2）直线可能在平面内，所以不能得出，故不正确；对于（3）若“为真命题”则均为真命题，故是假命题，正确；对于（4）因为时可得，反之不能得出，故“”是“”的必要不充分条件,故不正确.故选D.【点睛】本题主要考查简易逻辑，涉及知识点较多，要逐一判定，最后得出结论.题目属于知识拼盘.8. 若在区间(0,5]内随机取一个数m，则抛物线的焦点F到其准线的距离小于的概率为（）A. B. C. D.参考答案：B9. 已知双曲线，以右顶点为圆心，实半轴长为半径的圆被双曲线的一条渐近线分为弧长为1：2的两部分，则双曲线的离心率为（）A. B. C. D.参考答案：B10. 设是定义在上的奇函数，且，则（）A．－1 B．－2 C．1 D．2参考答案：B二、填空题:本大题共7小题,每小题4分,共28分11. 已知圆，圆与圆关于直线对称，则圆的方程是__________．参考答案：解：圆心与关于对称，∴，圆为．12. 当a > b > 0时，使不等式–> k (–)恒成立的常数k的最大值是。

四川省南充市第十中学高一化学下学期期末试题含解析

四川省南充市第十中学高一化学下学期期末试题含解析一、单选题（本大题共15个小题，每小题4分。

在每小题给出的四个选项中，只有一项符合题目要求，共60分。

）1. 反应4A(s)+3B(g)==2C(g)+D(g)，经2min后B的浓度减少0.6mol·L-1，下列说法正确的是A. 用A表示的反应速率是0.4mol·L-1·min-1B. 在2min末的反应速率，用B表示是0.3 mol·L-1·min-1C. 分别用B、C、D表示反应的速率，其比值是3:2:1D. 在这2min内B和C两物质浓度是逐渐减小的参考答案：C分析：经2min，B的浓度减少0.6mol/L，v(B)==0.3 mol·L-1·min-1，结合反应速率之比等于化学计量数之比来解答。

详解：A．A物质为纯固体，不能用来表示反应速率，故A错误；B．经2min，B的浓度减少0.6mol/L，v(B)==0.3 mol·L-1·min-1，反应速率为平均速率，不是2min末的反应速率，故B错误；C．反应速率之比等于化学计量数之比，则分别用B、C、D表示的反应速率其比值是3：2：1，故C正确；D．B为反应物，C为生成物，则在这2min内用B和c表示的反应速率的值分别为逐渐减小、逐渐增大，故D错误；故选C。

点睛：本题考查化学反应速率的计算及与化学计量数的关系，明确计算公式及反应速率为平均速率即可解答，注意选项A为易错点，纯液体或固体的物质的量浓度不变，化学反应速率不能用纯液体或固体来表示。

2. X.Y都是短周期元素，X原子最外层只有一个电子，Y元素的最高正价与最低负价的代数和为6，X 和Y两元素形成的化合物为R，则下列关于R的叙述正确的是( )A. R 一定是共价化合物B. R一定是离子化合物C. R可能是共价化合物，也可能是离子化合物D. R可能是液态物质，也可能是固态物质参考答案：CD试题分析：X、Y都是短周期元素，X原子最外层只有一个电子，所以X是第ⅠA族元素，可能是H 或Li或Na元素；Y元素的最高正价与最低负价的代数和为6，该元素属于第ⅦA元素，F元素没有正价，所以Y是氯元素；A、X和Y两元素形成的化合物可能是①HCl共价化合物，或②LiCl离子化合物，或③NaCl离子化合物，A错误；B、根据以上分析可知B错误；C、R可能是共价化合物，如氯化氢；也可能是离子化合物，如LiCl和NaCl，C正确；D、R可能是气态物质，例如氯化氢；也可能是固态物质，例如如LiCl和NaCl，D正确，答案选CD。

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