【学生版】洛阳市龙城双语初级中学(小八中)2017-2018学年第二学期第二次月考八年级物理试卷无答案
2018-2019学年河南省洛阳市龙城双语实验初级中学高二英语下学期期末试卷含解析
2018-2019学年河南省洛阳市龙城双语实验初级中学高二英语下学期期末试卷含解析一、选择题10. If there is anyone out there still doubts that America is a place where all things are possible，tonight is your answer.A. whereB. whoC. whichD. whom参考答案：B略2. If better use is _______ your spare time, you will have a more bright future.A. made ofB. spentC. used forD. taken参考答案：A23. I couldn’t help appauding for Liu Xiang’s excellent performance ______he got the first prize on the stage in the 16th Asian Games.A. for another timeB. suddenlyC. the momentD. once参考答案：C略4. ----Our teacher wants us to be _______ when we talk with foreigners.----Yes, we should believe in ourselves.A. comfortableB. confidentC. unusualD. cheerful参考答案：B略5.A. Having seenB. SeeingC. To seeD. Seen参考答案：D6. It was after having her first child at a time ______ my mother was working as a lawyer_______she decided to run for governor of the state.A. that; thatB. which; thatC. that; whoD. when; that参考答案：D【详解】考查强调句式和定语从句。
河南省洛阳八中2013-2014学年高二下学期期中模拟英语试题
河南省洛阳八中2013-2014学年高二下学期期中模拟英语试题第一部分：听力（略）第二部分：阅读理解(共两节，满分40分)第一节：（满分30分）AThere are popular programmes about the work of the police on TV. People like them because they are interesting and useful.In London there is a TV programme called “Police Five”. It takes five minutes a week. A TV reporter talks about crimes(犯罪) in London. He asks people for help, because the police station needs their help.The TV reporter shows picture of lost painting, lost cars and other lost things during the week. Sometimes he shows the picture of the car that the thieves(贼) drove away. When people see the picture of such things on TV, they may remember something so that they may tell the police where or when they saw them. With their help the police may catch more thieves.Sometimes the police find a car or something expensive that has ever been lost, the TV reporter shows them on TV. Then the owners may see them and they can get them back.56.“Police Five” is _______.A. name of a TV reporter.B. time of a TV programmeC. the name of a TV programmeD. a police station.57. “Police Five” is shown _________.A. every weekB. once a weekC. five minutes a dayD. five times a week58. This programme is about ___________.A. a TV reporterB. paintingC. carsD. crimes59. The police _______by this programme.A. let people understand themB. ask for people’s helpC. let people know what was lostD. let people feel interestingBIn recent years advances in medical technology have made it possible for people to live longer than in the past. New medicines and machines are being developed every day to extend life. However, some people, including some doctors, are not in favor of (不赞成) these life extending measures, and they argue that people should have the right to die when they want. They say that the quality (质量) of life is as important as life itself and that people should not be forced to go on living when conditions of life have become unbearable. They saw that people should be allowed to die with dignity (尊严) and to decide when they want to die. Others argue that life under any conditions is better than death and the duty of doctors is always to extend life as long as possible. And so the battle goes on and on without a definite (明确) answer.61. The best title for this passage is ___________.A. The Right to LiveB. The Right to DieC. The Doctor’s DutyD. Life Is Better Than Death62. In recent years, people can live longer than in the past. It’s because o f ___________.A. the development of medical technologyB. big hospitalsC. good doctorsD. good living conditions63. According to some people, whether a dying patient has the right to die or not is up to (该由) _____.A. the doctorsB. the surroundingsC. his or her familyD. the patient himself or herself64. In the writer’s opinion ______________.A. death is better than lifeB. life is better than deathC. neither death nor life is goodD. None of the above65. Which of the following statements is true according to the passage?A. Most of the medical workers join in the argument.B.The argument has ended in favor of the patient.C.The argument hasn’t ended yet.D. The quality of life is not as important as life itself.CCao Min couldn’t believe she was experiencing exactly what she had seen years ago in the film “Titanic”.Cao and her two children from Anhui Province were traveling on board the “Liaoludu 7” on February 22. They were among the first people on the ship who were rescued by lifeboats. Cao’s one-year-old son was the youngest passenger on board.The “Liaoludu 7” was traveling in the Bohai Straits from Lvshun in Liaoning Province to the port city of Longkou in Shandong Province. It suddenly lost its power at 230 pm and tilted(倾斜) on its side. With 81 people on board, the ferry began to sink.“I was so scared that my legs couldn’t move forward. They kept shaking even when I was asked to jump on to a lifeboat,” Cao recalled.Upon receiving the mayday appeal (紧急呼救), China Marine Search and Rescue Centre immediately informed the State Council. The center sent eight lifeboats to the fishing boats.After more than four hours of fighting strong winds and freezing ocean water, the passengers were recovered. All but four survived. These four died after spending too long time in the freezing waters, according to a spokesperson for the Beijing-based center.66. According to the passage, which of the following is TRUE?A. The film “Titanic” had been on show again in Shanghai.B. Cao Min and her children experienced the terrible accident.C. “Liaoludu 7” with all passengers on board were saved.D. The ferry began to sink on the way to the port of Liaoning.67. From the passage we can infer that .A. China Marine Search and Rescue Centre quickly carried out the rescue taskB. the center sent eight lifeboats and asked for help from the United NationsC. the passengers were fighting strong winds and freezing ocean water for one hourD. the ferry sank into the sea immediately it tilted on its side at 230 pm68. According to the passage, ________ passengers on board were still alive.A. fourB. seventy-sevenC. eightD. eighty-oneDApollo For lovers of the arts, Apollo is a truly necessary magazine. Covering the ages and the great civilizations of the world, Apollo brings you well-illustrated yet academic articles by internationally famous scholars, as well as information on exhibitions and sales. Experience five monthly issues for as little as £5 each.The Guardian Weekly gives you a global view with articles from four of the world’s most respected newspapers. Read the news from different views and draw your own conclusions on the stories shaping (影响) our world. Try it for 3 months for just £15.55. Plus get a free copy of The Guardian Year 2004.New Internationalist Full of excellent writing and photography, the NI covers one key subject each month, from Terrorism to Poverty to Climate Change. Reporters from around the globe provide you with a comprehensive world view. PLUS masses of fresh reports and stories to keep you up-to-date on world affairs. 3 months free and free World Map.The Week is the only weekly summary giving you the best of the British and foreign newspapers in just 35 pages. Designed to be read in just 1 hour, it provides you with everything you need and want to know. Try The Week now with 13 issues for just £13.75. If you decide it’s not for you, just tell us within the firs t 6 weeks and you can get your money back.69. Which of the following magazines will probably provide you with articles aboutmusic and paintings?A. ApolloB. The WeekC. New InternationalistD. The Guardian Weekly70 It is possible that most of the readers of the four magazines are ________ .A. menB. womenC. childrenD. grown-ups71 Which of the following would you most probably read if you want to getinformation from the world’s most popular newspapers?A. Apollo & The WeekB. Apollo & New InternationalistC. The Guardian Weekly & The WeekD. The Guardian Weekly & New Internationalist第二节（满分10分）For over one hundred and fifty years, Americans of all social classes have worn blue jeans． 1 Whether they are worn for work or for fashion today．Strauss' invention continues to be popular not only among Americans but also among people around the world．Levi Strauss was born in Germany in 1829． 2 He grew up in Kentucky before moving to New York in 1847．Before becoming an American citizen and moving to the West in 1853, Strauss worked in his brother's dry goods business．This gave him a chance to produce his famous invention．After the gold rush of 1949, Strauss decided to move to the West to seek his fortunes．Strauss did not want to be a person who searched an area for minerals．Instead, he knew he could make a good living by selling supplies to the miners．At first, he planned to sell sewing supplies and cloth． 3 When he heard miners complaining that their clothes were easily broken or they usually tore their pockets during mining, he decided to use a special fabric to make pants for the miners．These pants proved so popular that he quickly ran out of materials to make more．In 1873, Strauss received a letter from a Jewish tailor named Jacob Davis who had invented a process of connecting pockets with copper rivets（铆钉）．This made the pants last a long time．Because Davis did not have the money to patent his idea, he offered to share it with Strauss if Strauss would agree to pay for the patent． 4 ．The business has been growing ever since and Levi Strauss' company is now one of the largest clothing companies in the world．By the time Strauss died in 1902, he had made a great contribution to American fashion．5A．As a young boy, he moved with his family to the United States．B．Nobody knew what kind of material was suitable．C．He did and Levi jeans have been made with metal rivets ever since．D．However, he did not get much business for those products．E．He also made a great contribution to America's clothing industry．F．Since they were invented by Levi Strauss, they have become a symbol of American consumer culture．G．As the business grew, Strauss got much money from it．第三部分第一节：完形填空（共20小题；每小题1.5分，满分30分）阅读下面短文，掌握其大意，然后从36～55各题所给的四个选项（A、B、C和D）中，选出最佳选项。
河南省洛阳市龙城双语实验初级中学2018年高一英语月考试卷含解析
河南省洛阳市龙城双语实验初级中学2018年高一英语月考试卷含解析一、选择题1. —Let's just play a game or something else.—Sounds good，but give me a call before you come.My mom might try to ________ something else for me to do.A．come up with B．keep up withC．put up with D．catch up with参考答案：A[come up with“提出”；keep up with“跟上”；put up with“容忍”；catch up with“赶上”。
结合句意应选A。
]20. What people like to eat is subjective, but ______ the northerners like dumplings while the southerners are fond of rice.A. by chanceB. in particularC. at easeD. in general参考答案：D略3. _______of the truth of the reports, he told his colleagues about it.A. ConvincingB. ConvincedC. To convinceD. Having convinced参考答案：B4. My father read through my composition and _____ quite a few spelling mistakes in it.A. soughtB. issuedC. spottedD. consulted参考答案：C5. The boy ______ fifty Yuan in repairing the watch yesterday.A. costB. spentC. paidD. took参考答案：B6. There is, __________ , one further point to make.A. in peaceB. in additionC. in cashD. in relief参考答案：B7. According to a UN report, 30 percent of the world population have no ______ to clean drinking water and health care.A. senseB. destinationC. accessD. standard参考答案：C8. You’ll sound a lot more polite if you make a request _______ a question. ks5uA. in the form ofB. in reply toC. in preparation forD. in return for参考答案：A9. The leader, as well as his team, ______interviewed the moment they announced their discovery.A. wereB. wasC. isD. are参考答案：B10. ---What’s wrong with her?---A letter from her home ______ her feeling of homesickness.A. set aboutB. set outC. set offD. set up参考答案：C11. Looking good is important to women, _______ it?A. doesB. isn’tC. doesn’tD. is参考答案：B12. He________ a gold medal by us.A．is to award B．is to be awardedC．is awarded D．is awarding参考答案：B解析考查动词语态。
河南省洛阳市八中高一英语下学期第二次月考试题
河南省洛阳市八中2013-2014 学年高一英语下学期第二次月考试题新人教版满分共120 分，时间：90 分钟阅读理解（共两节，满分40 分）第一节（共15 小题，每小题 2 分，满分30 分）AWhen we walk through the city, we all experience a kind of information overload but we pay attention only to those that are important to us. We don ' tstop, we keep our faces expressionless and eyes straight ahead, and in doing so, we are not just protecting ourselves but are avoiding overloading other people as well.We make use of stereotypes （刻板的模式） as convenient ways to make quick judgements about situations and people around us. They may not always be accurate, and they can often be dangerously wrong, but they are used regularly.The problem with the stereotypes is that they restrict experience. By using limited clues to provide us with a rapid opinion of other people or places we may choose to limit our communication. We may decide not to go to certain places because we believe they will not offer something we enjoy.In the city, styles of dress are particularly important with regard to self-presentation. Different groups often use clearly identifiable styles of clothes so that they can be easily recognized. It is becoming increasingly common for brand names to be placed on the outside of clothes, and this labeling makes it easy to send out information about fashion and price instantly, and lets others tell at a distance whether an individual has similar tastes and is a suitable person to associate with.In England, where social grouping or class continues to make social distinctions （区分）, clothes, hairstyles, people ' s pronunciation and the manner of speakingare all clues to our social group. Class distinctions tend to be relatively fixed, although in the city where greater variety is permitted, they are more likely to be secondary determining factors of friendship and association.1. People walking in cities ignore the surroundings because ________ .A. they do not wish to talk to other peopleB. everyone else is expressionlessC. the environment is already familiar to themD. there is too much information to take in2. According to the passage, the main disadvantage of using stereotypes is that they .A. are likely to lead us into dangerous situationsB. may make us miss some pleasant experienceC. can rarely be relied onD. make us mentally lazy3. From the passage we may conclude that _______ .A. stereotypes can help to understand people fullyB. people are becoming more interested in fashionC. dressing can send messages about individualsD. stereotypes can do more harm than good to people4. It would appear that in England, a person 's class __________ .A. might be less important in making friends in a cityB. is mainly determined by his pronunciationC. plays less of a role than it did in the pastD. is something that can be changed easilyBLying in the sun on a rock, the cougar（美洲豹）saw Jeb and his son, Tom before they saw it. Jeb put his bag down quickly and pulled his jacket open with both hands, making himself look big to the cougar, It worked. The cougar hesitated, ready to attack Jeb, but ready to forget the whole thing, too.Jeb let go of his jacket, grasped Tom and held him across his body, making a cross. Now the cougar 's enemy looked even bigger, and it rose up, ready to move away, but unfortunately Tom got scared and struggled free of Jeb. “Tom, no”shouted his father. But Tom broke and ran and that 's the last thing you dowith a cougar. The second Tom broke free, Jeb threw himself on the cougar, just as it jumped from the rock. They hit each other in mid-air and both fell. The cougar was on Jeb in a flash, forgetting about Tom, which was what Jeb wanted.Cougars are not as big as most people think and a determined man stands a chance, even with just his fists. As the cougar 's claws（爪子）got into his left shoulder, Jeb swung his fist at its eyes and hit hard. The animal howled （吼叫）and put its head back. Jeb followed up with his other fist. Then out of the corner of his eye, Jeb saw Tom. The boy was running back to help his father.“Knife, Tom, ” shouted Jeb.The boy ran to his father 's bag, while Jeb started shouting as well ashitting, to keep the cougar 's attention away from T om. Tom got the knife and ranover to Jeb. The cougar was moving its head in and out, trying to find a waythrough the wall Jeb was making out of his arms. Tom swung with the knife, intothe cougar ' s back. It howled horribly and ran off into the mountains. The whole fight had taken about thirty seconds.5. Why did Jeb pull his jacket open when he saw the cougar?A. To get ready to fightB. To frighten it awayC. To protect the boyD. To cool down6. What do we know about cougars?A. They are afraid of noisesB. They hesitate before they hitC. They are bigger than we thinkD. They like to attack running people7. How did Jeb try to hold the cougar ' s attention?A. By keeping shouting and hittingB. By making a wall out of his armsC. By throwing himself on the cougarD. By swinging his fists at the cougar ' s eyes8. Which of the following happened first?A. The cougar jumped from the rockB. Tom struggled free of his fatherC. Jeb asked Tom to get the knifeD. Jeb held Tom across his bodyCSome people will do just about anything to save money. And I am one of them.Take my family ' s last vacation. It was my six -year- old son ' s winter break form school, and we were heading home from Fort Lauderdale after a weeklong trip. The flight was overbooked, and Delta, the airline, offered us $400 per person in credits to give up our seats and leave the next day. I had meetings in New York So I had to get back. But that didn't mean my husband and my son couldn't stay. I took my nine-month-old and took off for home.The next day, my husband and son were offered more credits to take an even later flight. Yes, I encouraged —okay, ordered —them to wait it out at theairport, to "earn" more Delta Dollars. Our total take: $1,600. Not bad, huh?Now some people may think I'm a bad mother and not such a great wife either.But as a big-time bargain hunter, I know the value of a dollar. And these days, a good deal is something few of us can afford to pass up.I've made living looking for the best deals and exposing （揭露）the worst tricks. I have been the consumer reporter of NBC's Today show for over a decade.I have written a couple of books including one titled Tricks of the Trade: A Consumer Survival Guide. And I really do what I believe in.I tell you this because there is no shame in gett ing your moneys worth.I ' m also tightfisted when it comes to shoes, clothes for my children, and expensive restaurants. But I would n't hesitate to spend on a good haircut. It keeps its shape Ion ger, and it's the first thi ng people no tice. And I will also spe nd on a classic piece of furn iture. Quality lasts.9. Why did Delta give the author's family credits?A. They took a later flight.B. They had early book in gs.C. Their flight had bee n delayed.D. Their flight had bee n can celled.10. What can we lear n about the author?A. She rarely misses a good deal.B. She seldom makes a compromise.C. She is very strict with her childre n.D. She is in terested in cheap products.11. What does the author do?A. She's a teacher.B. She's a housewife.C. She's a media pers on.D. She's a bus in esswoma n.12. What does the author wa nt to tell us?A. How to expose bad tricks.B. How to reserve airli ne seats.C. How to spe nd money wisely.D. How to make a bus in ess deal.CWelcome to Intern ati onal Stude nt In sura nee （保险）,the nu mber one on li nedesti nati on for intern ati onal stude nt health in sura nee and travel in sura nee pla ns.Here you will find information on the best international health, medical and stude nt in sura nce pla ns to fit the n eeds of the intern ati onal stude nt:At Intern atio nal Stude nt In sura nee, we pride ourselves on oferi ng the best intern ati onal stude nt in sura nee pla ns to stude nts from all around the world. Our pla ns are reeog ni zed around the world as providi ng high-quality service at low prices —so please feel free to browse our site and lear n more about what we offer.We also offer many ways to help you in your buying deeisi on. Please also feel free to con tact （联系）our frien dly customer support team who are on handeither by e-mail or pho ne.You don ' t have to be a student to buy one of our plans. Non-students canvisit our sister site Intern ati onal Citize ns ——Intern ati onal Health In sura nee.If you are looking for an international plan to fit the need of your group of intern ati onal stude nts, please visit our group in sura nee cen ter for more.13. Any stude nt who wants to lear n about the in sura nee pla ns can click thefollowi ng EXCEPT ____ .A. Stude nt SafetyB. I nternatio nal Citize nsC. Atlas In ternatio nalD. Stude nt STM14. The underlined word “browse”（in Paragraph 4） means “__________A. look afterB. look forC. look throughD. look at15. Where can we probably read this passage?A. In a n ewspaper.B. On the Intern et.C. In a magaz ine.D. In a story book.16. The group in sura nee cen ter is for ___ .A. every stude ntB. groups of intern ati onal stude ntsC. America n stude ntsD. sin gle intern ati onal stude nt第二节（共5小题；每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。
河南省洛阳市龙城双语实验初级中学2022年高二英语上学期期末试卷含部分解析
河南省洛阳市龙城双语实验初级中学2022年高二英语上学期期末试卷含解析一、选择题30. To keep safe _________ an earthquake, you should remain at a spot in your room where nothing may fall on you.A. in memory ofB. in search ofC. in favour ofD. in case of参考答案：D略2. He was about to go out for a walk________ his teacher came to visit him.A. whileB. whenC. whichD. then参考答案：B略3. I used to cook in the microwave oven, but I’ve _________ to gas ring for convenience because there has been often a power failure in our neighborhood recently.A. devotedB. pointedC. attendedD. switched参考答案：D4. _______away from the noise, the old couple moved to the countryside.A.BeingB. BeC. To beD. Having been参考答案：C5. According to the recent findings , the chemicals ____ the balance of the environment .A. annoyB. upsetC. abuseD. appoint 参考答案：B6. You can't imagine the hard time he had ______ the horse in.A. holdingB. to holdC. heldD. hold 参考答案：A略7. It is said that the school festival ______ next week.A. holdB. to holdC. isheld D. will be held参考答案：D7. ______Esme’s website, and you’ll get a list of children’s books for different age groups.A.VistingB.to visitC.VisitD. Having visited参考答案：C略9. There was a heated debate in the newspaper about whether poor education ______ people to low－paid jobs.A．caused B．condemned C．contributed D．conducted参考答案：B10. Have your parents made any financial allowance your study visit?A.aboutB.forC.withD.against参考答案：B提示:make allowance for固定搭配,意为“考虑到,顾虑到”。
河南省洛阳市外国语学校2024届八年级语文第二学期期末质量检测模拟试题含解析
河南省洛阳市外国语学校2024届八年级语文第二学期期末质量检测模拟试题请考生注意：1．请用2B铅笔将选择题答案涂填在答题纸相应位置上，请用0．5毫米及以上黑色字迹的钢笔或签字笔将主观题的答案写在答题纸相应的答题区内。
写在试题卷、草稿纸上均无效。
2．答题前，认真阅读答题纸上的《注意事项》，按规定答题。
一、语文基础知识（12分）1．（2分）下列句子中，没有语病的一项是（）A．“锦鲤营销”泛滥的原因，根植于社会上普遍存在的“锦鲤心态”。
B．据调查，盗版书通常以低于正版书二三倍的价格在市场上出售。
C．有关部门表示，未来，北京市公安局将进一步为居住证发放、申请提供便利。
D．游客们是否有良好的行为表现，直接体现了一个人较高的素质水平。
2．（2分）下列句子没有语病．．．．的一项是（）A．随着山东打响黑臭水体治理和水源水质保护攻坚战，使农村水环境质量得到明显改善。
B．《经典咏流传》告诉我们，古诗词本身有着无穷魅力，今人只差爱上它们的机缘。
C．法治社会，要培养孩子的法治观念，只有守法、知法、学法才能获得真正的自由。
D．为了切实改善同学们的语文素养，许多学校积极开展“阅读经典作品，建设书香校园”活动。
3．（2分）下列句子没有语病．．．．的一项是（）A．沪昆高铁开通后，从昆明到上海的时间大约需要12小时，比原来减少了三倍。
B．6月5日，中国选手马龙在2017世界乒乓球锦标赛男单决赛中，以4︰3的比分打败了对手樊振东，再次蝉联冠军。
C．通过全市上下的共同努力，让曲靖市交出了一份提升城乡人居环境满意的成绩单。
D．共享单车是指企业与政府合作，在校园、地铁站点、公交站点……提供自行车共享服务，是共享经济的一种新形态。
4．（2分）下列句子中加点词语使用不正确的一项是( )A．春晚舞台上一个个故事勾勒．．出幸福中国的美好画面。
B．四十年来我国改革开放的精神从未褪色．．。
C．春节联欢晚会上一个个杂技节目让我们眼花缭乱,一个个演员让我们叹为观止．．．．。
2022年河南省洛阳市龙城双语实验初级中学高二物理联考试卷带解析
2022年河南省洛阳市龙城双语实验初级中学高二物理联考试卷含解析一、选择题：本题共5小题，每小题3分，共计15分．每小题只有一个选项符合题意1. 18、（6分）如图所示，是测量电池的电动势和内阻的实验中得到的图线，则该电池的电动势为 V，内阻为Ω，电流为0.5A 时外电阻为Ω。
参考答案：2. 如图所示，匀强磁场垂直于矩形线框abcd，磁场的磁感应强度为B，矩形面积为S．现使矩形框以ab边为轴转动90°角，则在这个过程中，穿过线框的磁通量变化量的数值是（）A．0 B．0.5BS C．BS D．2BS参考答案：C【考点】法拉第电磁感应定律．【分析】通过线圈的磁通量可以根据Φ=BSsinθ进行求解，θ为线圈平面与磁场方向的夹角．【解答】解：当线圈平面与磁场方向垂直时，Φ=BS．当线圈绕ab轴转动至与磁场方向平行时，线圈平面与磁场方向的夹角为0度，则Φ=0．根据Φ=BSsinθ知，在此转动过程中，穿过线圈平面的磁通量变化量为BS，故C正确，ABD错误．故选：C．3. 不可回收的航天器在用后，将成为太空垃圾，如图是漂浮在地球附近的太空垃圾示意图，下列说法中正确的是（）A．离地越低的太空垃圾运行的向心加速度一定越大B．离地越低的太空垃圾受到的地球的万有引力一定越大C．由公式v=得，离地越高的太空垃圾运行速率越大D．太空垃圾可能跟同一轨道上同向飞行的航于器相撞参考答案：A【考点】万有引力定律及其应用．【分析】太空垃圾绕地球做匀速圆周运动，靠地球的万有引力提供向心力，进入大气层后，受空气阻力，速度减小，万有引力大于所需要的向心力，做向心运动【解答】解：根据万有引力提供向心力，有得向心加速度线速度AC、可知离地越低的太空垃圾，r越小，向心加速度a越大；离地越高的太空垃圾，r越大，v越小，故A正确，C错误；B、根据万有引力公式，因为太空垃圾质量未知，所以离地越低的太空垃圾受到的万有引力不一定大，故B错误；D、根据线速度公式，在同一轨道上的航天器与太空垃圾线速度相同，如果它们绕地球飞行的运转方向相同，它们不会碰撞，故D错误；故选：A4. 关于速度和加速度的关系，下列说法中正确的是（）A．速度变化越慢，加速度就越小B．速度变化越大，加速度就越大C．加速度方向保持不变，速度方向也保持不变D．加速度大小不断变小，速度大小也不断变小参考答案：A【考点】加速度．【分析】加速度是反映速度变化快慢的物理量，当加速度方向与速度方向相同，做加速运动，当加速度方向与速度方向相反，做减速运动．【解答】解：A、加速度是反映速度变化快慢的物理量，速度变化越慢，则加速度越小．故A正确．B、根据a=知，速度变化越大，加速度不一定大．故B错误．C、加速度方向保持不变，速度方向可能改变，比如平抛运动．故C错误．D、当加速度方向与速度方向相同，加速度逐渐减小，速度仍然增大．故D错误．故选：A．5. 理论分析表明，天体系统中逃逸速度是第一宇宙速度的倍。
河南省洛阳市龙城双语实验初级中学2021年高二化学模拟试卷含解析
河南省洛阳市龙城双语实验初级中学2021年高二化学模拟试卷含解析一、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. 试验室中，要使AlCl3溶液中的全部沉淀出来，最适宜选用的试剂是A. Ba(OH)2溶液 B . NaOH溶液 C. 盐酸 D. 氨水参考答案：D2. 下列有关化学键的叙述中，不正确的是（）A.某原子跟其他原子形成共价键时，其共价键数一定等于该元素原子的价电子数B.水分子内氧原子结合的电子数已经达到饱和，故不能再结合其他氢原子C.完全由非金属元素形成的化合物中也可能含有离子键D.配位键也具有方向性、饱和性参考答案：A略3. 把物质的量均为0.1mol的AlCl3、CuCl2和H2SO4溶于水制成100ml的混合溶液，用石墨做电极电解，并收集两电极所产生的气体，一段时间后在两极收集到的气体在相同条件下体积相同。
则下列描述正确的是（）A．电路中共转移0.9mol电子B．阳极得到的气体中有O2且其物质的量为0.35molC．阴极质量增加3.2gD．铝元素以均Al(OH)3的形式存在参考答案：A略4. 在一定条件下，将1mol的CO和1mol水蒸气通入容器中发生下述反应：CO＋H2O CO2＋H2，达到平衡后，测得CO2为0.6mol，再通入0.4mol水蒸气，又达到平衡后，CO2的物质的量为A．等于0.6mol B．等于1molC．大于0.6mol小于1mol D．大于1mol参考答案：C略5. 钢铁发生吸氧腐蚀时，正极上发生的电极反应是：A.2H+ + 2e- === H2↑B.Fe2+ + 2e- == FeC.2H2O + O2 + 4e- === 4OH-D. Fe3+ + e- === Fe2+参考答案：C略6. 据报道，在月球的土壤中含有较丰富的He，它可以作为未来核聚变的重要原料．He原子核内的中子数是（）A．1 B．2 C．3 D．4参考答案：A考点：核素．.专题：原子组成与结构专题．分析：根据在原子中，质量数=质子数+中子数，据此进行分析解答本题．解答：在原子中，质量数=质子数+中子数，He的原子核内质子数为2，质量数为3，则H的中子数为1，故选A．点评：本题考查学生对原子结构的认识，注意根据质量数=质子数+中子数进行分析解题，题目难度不大．7. 下列说法正确的是（）图1 图2 图3 图4A．图1为实验室制备硝基苯的装置B．图2中振荡后下层为无色C．制备乙酸乙酯：用右图所示的实验装置D．图4装置可以达到验证溴乙烷发生消去反应生成烯烃的目的参考答案：B略8. 电解NaCl溶液的装置如图所示，下列说法不正确的是A．铁电极上的电极反应式为Fe―2e―＝Fe2＋B．溶液中Na＋由石墨电极向铁电极移动C．通电一段时间后，可看到铁电极附近溶液变红D．通电一段时间后，可看到试管中溶液变蓝参考答案：A略9. 在下列溶液中，各组离子一定能够大量共存的是A．使酚酞试液变红的溶液：Na+、Cl－、SO42－、Fe3+B．有SO42-存在的溶液中：Na+、Mg2+、Ca2+、I－C．在pH＝1的溶液中：NH4＋、K＋、NO3－、Cl－D．有NO3－存在的强酸性溶液中：NH4＋、Ba2＋、Fe2＋、Br－参考答案：C略10. 某强酸的pH= a ，强碱的pH= b 。