试卷八
测量学试卷之八及答案
测量学试卷八一、填空题1. 1.测量中测定地面点位是通过测定三个定位元素、和来实现的。
2. 2.珠穆朗玛峰高为8844.43米，其含义是：。
3. 3.观测竖直角时，在读取竖盘读数之前，应调节，使之。
其目的是使处于一个正确的固定位置。
4. 4.称为直线定向。
5. 5.用某一经纬仪测量水平角，一测回观测中误差为±15″欲使测角精度达到±5″，需要测个测回。
6. 6.在小三角测量中，由各个三角形连续形成的图形称为三角锁，而各个三角形连成的图形称为三角网。
7.7.一组闭合的曲线是表示山头还是洼地，要根据或来判断。
8.8.某幅正方形图幅编号为123°-4410.00-48.00，表示该图所在投影带的经度为123°，图幅西南角的坐标，X= KM，Y= KM。
9.9.测设点的平面位置，通常有、、和。
10.10.路基边桩测设的常用方法有和。
二、选择题1. 1.设A点的通用坐标为（38246.78，15525833.20）米，则该点所在6度带带号及其坐标自然值为（）。
A)A)38、（2467.78，15525833.20）B)B)15、（38246.78，25833.20）C)C)38、（-497532.22，15525833.20）D)D)15、（38246.78，525833.20）2. 2.水准测量中，调节圆水准气泡居中的目的是使（）。
A)A)竖轴竖直B)B)视准轴水平C)C)十字丝横丝水平D)D)十字丝竖丝竖直3. 3.经纬仪在进行角度观测之前，不必要满足的条件是（）。
A)A)LL⊥VVB)B)CC⊥HHC)C)HH⊥VVD)D)CC⊥L′L′4. 4.一钢尺名义长度为30米，与标准长度比较得实际长度为30.015米，则用其量得两点间的距离为64.780米，该距离的实际长度是（）。
A)A)64.748mB)B)64.812mC)C)64.821mD)D)64.784m5. 5.中误差反映的是（）。
八年级 三角形测试卷【含答案】
八年级三角形测试卷【含答案】专业课原理概述部分一、选择题（每题1分，共5分）1. 在三角形ABC中，若∠A=90°，则三角形ABC是（）A. 钝角三角形B. 直角三角形C. 锐角三角形D. 无法确定2. 已知三角形ABC中，AB=AC，那么三角形ABC是（）A. 钝角三角形B. 直角三角形C. 等腰三角形D. 等边三角形3. 在三角形中，下列哪个角不能是直角？（）A. 最大角B. 最小角C. 中间大小的角D. 以上都可以4. 三角形的内角和等于（）A. 180°B. 360°C. 90°D. 270°5. 在等边三角形中，每个内角的度数是（）A. 30°B. 45°C. 60°D. 90°二、判断题（每题1分，共5分）1. 所有的三角形内角和都等于180°。
（）2. 等腰三角形的两个底角相等。
（）3. 任何一个三角形的两边之和都大于第三边。
（）4. 三角形的三个角中，只能有一个直角。
（）5. 在三角形中，钝角一定比锐角大。
（）三、填空题（每题1分，共5分）1. 三角形的内角和等于______。
2. 若一个三角形的两边分别是3cm和4cm，那么第三边的长度可能是______。
3. 在直角三角形中，斜边是______边中最长的。
4. 等腰三角形的两个底角是______的。
5. 若一个三角形的两个内角分别是40°和90°，则第三个内角是______°。
四、简答题（每题2分，共10分）1. 请简要解释三角形的内角和定理。
2. 什么是等腰三角形？它有什么特点？3. 直角三角形中的直角边和斜边之间有什么关系？4. 请解释三角形的不等式定理。
5. 如何判断一个三角形是锐角三角形、直角三角形还是钝角三角形？五、应用题（每题2分，共10分）1. 在三角形ABC中，∠A=40°，∠B=70°，求∠C的度数。
八年级下册地理试卷(含答案)
八年级下册地理试卷(含答案)第一部分：选择题（每小题2分，共30分）
1. 地球上最大的洲是（）
A. 亚洲
B. 非洲
C. 欧洲
D. 南美洲
2. 以下国家不是北美洲国家的是（）
A. 加拿大
B. 墨西哥
C. 巴西
D. 美国
3. 世界上最大的洋是（）
A. 太平洋
B. 印度洋
C. 大西洋
D. 北冰洋
4. 非洲最大的湖是（）
A. 利比亚湖
B. 坦桑尼亚湖
C. 尼罗河
D. 刚果河
5. 世界上最长的河流是（）
A. 长江
B. 尼罗河
C. 黄河
D. 亚马逊河
...
第二部分：解答题（共70分）
1. 请简要说明亚洲的地理特点和人口分布情况。
（10分）
2. 列举三个国际河流，并简要介绍每个河流的重要意义。
（15分）
...
答案：
第一部分：
1. A
2. C
3. A
4. B
5. B
...
第二部分：
1. 亚洲是世界上面积最大的洲，人口众多，分布较为集中在东亚和南亚两个地区。
东亚地区人口密度较高，有中国、日本、韩国等发达国家；南亚地区也人口众多，有印度、巴基斯坦等国家。
2. 国际河流：尼罗河、亚马逊河、长江。
尼罗河是非洲最长的河流，是埃及文明的发源地，对非洲人民的生活和农业产生了重要影响；亚马逊河是世界上水流最大、流域最大的河流，对南美洲的生物多样性和经济发展起到了重要作用；长江是亚洲最长的河流，是中国的母亲江，对中国的农业、交通、水资源等方面有着重要意义。
...
请根据以上答案自行核对。
英语专八试卷真题及答案
英语专八试卷真题及答案 Revised final draft November 26, 20202004年英语专八试卷真题及答案PART Ⅰ LISTENING COMPREHENSIONSECTION A TALKLanguage is used for doing things. People use it in everyday conversation for transacting business, planning meals and vacations, debating politics, and gossiping. Teachers use it for instructing students, and comedians use it for amusing audiences. All these are instances of language use - that is activities in which people do things with language. As we can see, language use is really a form of joint action.What is joint action I think it is an action that is carried out by a group of people doing things in coordination with each other. As simple examples, think of two people waltzing, or playing a piano duet. When two dancers waltz, they each move around the ballroom in a special way. But waltzing is different from the sum of their individual actions. Can you imagine these two dancers doing the same steps, but in separate rooms, or at separate times So waltzing is, in fact, the joint action that emerges as the two dancers do their individual steps in coordination, as a couple.Similarly, doing things with language is also different from the sum of the speaker speaking and the listener listening. It is the joint action that emerges when speakers and listeners, or writers and readers, perform their individual actions in coordination, as ensembles. Therefore, we can say that language use incorporates bothindividual and social processes. Speakers and listeners, writers and readers, must carry out actions as individuals, if they are to succeed in their use of language. But they must also work together as participants in the social units I have called ensembles. In the example I mentioned just now, the two dancers perform both individual actions, moving their bodies, arms, and legs, and joint actions, coordinating these movements, as they create the waltz. In the past, language use has been studied as if it were entirely an individual process. And it has also been studied as if it were entirely a social process. For me, I suggest that it belongs to both. We cannot hope to understand language use without viewing it as joint actions built on individual actions. In order to explain how all these actions work,I'd like to review briefly settings of language use. By settings, I mean the scene in which language use takes place, plus the medium - which refers to whether language use is spoken or written. And inthis talk, I'll focus on spoken settings.The spoken setting mentioned most often is conversation - either face to face, or on the telephone. Conversations may be devoted to gossip, business transactions or scientific matters, but they're all characterized by the free exchange of terms among the two participants. I'll call these personal settings. Then we have what I would call nonpersonal settings. A typical example is the monologue.In monologues, one person speaks with little or no opportunity for interruption, or turns by members of the audience. Monologues come in many varieties too, as a professor lectures to a class, or a student giving a presentation to a seminar. These people speak for themselves, uttering words they formulated themselves for the audience before them, and the audience isn't expected to interrupt. In another kindof setting which are called institutional settings, the participantsengage in speech exchanges that look like ordinary conversation, but they are limited by institutional rules. As examples, we can think of a government official holding a news conference, a lawyercross questioning a witness in court, or a professor directing a seminar discussion. In these settings, what is said is more or less spontaneous, even though turns at speaking are allocated by a leader, or are restricted in other ways.The person speaking isn't always the one whose intentions are being expressed. We have the clearest examples in fictional settings. Vivian Leigh plays Scarlett O'Hara in "Gone with the Wind", Frank Sinatra sings a love song in front of a live audience, the speakers are each vocalizing words composed by someone else - for instance a playwright or a composer - and are openly pretending to be expressing opinions that aren't necessarily their own. Finally there are private settings when people speak for themselves without actually addressing anyone else, for example, I might explain silently to myself, or talk to myself about solving a research problem, or rehearsing what I'm about to say in a seminar tomorrow. What I say isn't intended to be recognized by other people, it is only of use to myself. These are the features of private settings.SECTION B TALKW: Good evening, I'm Nancy Johnson. The guest on our radio talk this evening is Professor Wang Gongwu. Hello, Professor Wang.M: Hello.W: Professor Wang, you're now professor emeritus of Australia National University, and in your long academic career, you've wornmany hats as tutor, lecturer, department head, dean, professor, and vice chancellor. However, as I know, you're still very fond of your university days as a student.M: That's right. That was in 1949. The university that I went to was a brand new university then, and the only one in the country at that time. When I look back, it was an amazingly small university, and we knew everybody.W: How did the students like you, for example, study thenM: We didn't study very hard, because we didn't have to. We didn't have all this fantastic competition that you have today. Mmm. We were always made to feel that getting a first degree in the Arts faculty was not preparation for a profession. It was a general education. We were not under any pressure to decide on our careers, and we had such a good time. We were left very much on our own, and we were encouraged to make things happen.W: What do you see as the most striking difference in university education since thenM: University education has changed dramatically since those days. Things are very specialized today.W: Yes, definitely so. And, in your subsequent career experience as an educator and later administrator in various institutions of higher education in Asia and elsewhere, Professor Wang, you have repeatedlynoted that one has to look at the development of education in one particular country in a broad context. What do you mean by thatM: Well, the whole world has moved away from elite education in universities to meet the needs of mass education, and entering universities is no longer a privilege for the few. And universities today are more concerned with providing jobs for their graduates in a way that universities in our time never had to be bothered about. Therefore, the emphasis of university programs today is now on the practical and the utilitarian, rather than on a general education or on personal development.W: Do you think that is a welcome developmentM: Well, I personally regret this development. But the basicbachelor's education now has to cater to people who really need a piece of paper to find a decent job.W: So you're concerned about this development.M: Yes, I'm very concerned. With technical changes, many of the things that you learn are technical skills, which don't require you to become very well educated. Yet, if you can master those skills, you can get very good jobs. So the technical institutions are going to be increasingly popular at the expense of traditional universitites.W: Professor Wang, let's look at a different issue. How do you comment on the current phenomenon because of the fees they payM: Well, once you accept students on financial grounds, one wonders whether you have to pass them as well. But this is the development in education that we have to contend with. Yet, if we are concerned about maintaining standards, what we can do is to concentrate on improving the quality of education.W: Yes, you're right. A university is judged by the quality of education it offers. Professor Wang, let's turn to the future. What type of graduates, in your view, to universities of the future need to produce, if they are to remain relevantM: I think their graduates must be able to shift from one profession to another, because they are trained in a very independent way. If you can do that, you raise the level of the flexibility of the mind. Today's rapid changes in technology demand this adaptability. And you see the best universities in the world are already trying to guarantee that their students will not only be technically trained, but will be the kind of people that can adapt to any changing situation.W: I guess many people would agree with you on that point. University education should focus on both personal and professional development of students. But still some might believe there is a definite place for education in a broader sense - that is, in personal intellectual development.M: No doubt about that. We need people who will think about the future, about the past, and also people who will think about society.If a society doesn't have philosophers, or people who think about the value of life, it's a very sad society indeed.W: Professor Wang, my last question: do you see any common ground in education between your generation and the young generation nowM: Adapting to new challenges is perhaps the true cornerstone of our generation's legacy to education. And the future of education in a country rests not so much on the construction of better buildings, labs, etc., but in the development of an ever adaptable mind.W:That's true. The essence of education is the education of the mind. Okay, thank you very much, Professor Wang, for talking to us on the show about the changing trends in education.M: You're welcomeSECTION CA new data shows that the global AIDS pandemic will cause a sharp drop in life expectancy in dozens of countries, in some cases, declines of three decades. Several nations are losing a century's progress in extending the length of life. Nations in every part of the world, 51 in all, are suffering declining life expectancies because of an increasing prevalence of HIV infection. The increase is occurring in Asia, Latin America, and the Carribbean, but is greatest in sub Saharan Africa, a region with only 10% of the world's population but 70% of the world's HIV infections. Seven African countries have life expectancies of less than 40 years. For example, in Botswana, where 39% of the adult population is infected with HIV,life expectancy is 39 years. But by 2010, it will be less than 27 years. Without AIDS, it would have been 44 years. Life expectancy throughout the Carribbean and some Central American nations will drop into the 60's by 2010, when they would otherwise have been in the70's without AIDS. In Cambodia and Burma, they are predicted to decline to around 60 years old, to what otherwise would have been in the mid 60's. Even in countries where the number of new infections is dropping, such as Thailand, Uganda, and Senegal, small life expectancy drop is forecast. Back in the early 1990's, we never would have suspected that population growth would have turned negative because of AIDS mortality. In less than 10 years, we expect that 5 countries will be experiencing negative population growth because of AIDS mortality, including South Africa, Mozambique, Lesotho, Botswana and Swaziland.Questions 14 and 15 are based on the following news. At the end of the news item, you will be given 30 seconds to answer the questions. Now listen to the news.The European Union has drafted alist of US products to be hit with import taxes in retaliation for tariffs the United States has imposed on European steel. EU member governments will review the list before the EU submits it to the World Trade Organization, which arbitrates international trade disputes. EU officials will not say which American products will be hit by the EU sanctions. But diplomats monitoring the most recent trans Atlantic trade dispute say they include textiles and steel products.Earlier this month, the Bush administration imposed tariffs of up to 30 percent on some steel imports, including European products.The EU has appealed to the World Trade Organization to get those duties overturned. But a WTO decision on the matter could take up to a year or more. EU officials say that, under WTO rules, the EU has the right to impose retaliatory measures in June. But they saythe United States can avoid the EU's possible countermeasures if it pays more than two billion dollars in compensation to the EU for imposing the steel tariffs in the first place. The officials say Washington could also escape retaliation by lowering U.S. import duties on other EU products. The Bush administration says it will not pay compensation.SECTION D TALKGood morning. Today's lecture will focus on how to make people feel at ease in conversations. I guessall of you sitting here can recall certain people who just seem to make you feel comfortable when they are around. You spend an hour with them and feel as if you've known them half your life. These people who have that certain something that makes us feel comfortable have something in common, and once we know what that is, we can go about getting some of that something for ourselves. How is it done Here are some of the skills that good talkers have. If you follow the skills, they will help you put people at their ease, make them feel secure, and comfortable, and turn acquaintances into friends. First of all, good talkers ask questions. Almost anyone, no matter how shy, will answer a question. In fact, according to my observation, very shy persons are often more willing to answer questions than extroverts. They are more concerned that someone will think them impolite if they don't respond to the questions. So most skillful conversationalists recommend starting with a question that is personal, but not harmful. For example, once a famous American TV presenter got a long and fascinating interview from a notoriously private billionaire by asking him about his first job. Another example, one prominent woman executive confesses that at business lunches, "I always ask people what they did that morning. It's a dull question, but it gets things going." From there, you can move on to other matters, sometimes to really personal questions. Moreover, howyour responder answers will let you know how far you can go. A few simple catchwords like "Really" "Yes" are clear invitations to continue talking. Second, once good talkers have asked questions,they listen for answers. This point seems obvious, but it isn't in fact. Making people feel comfortable isn't simply a matter of making idle conversation. Your questions have a point. You're really asking, "What sort of person are you" and to find out, you have to really listen. There are at least three components of real listening. Forone thing, real listening means not changing the subject. If someone sticks to one topic, you can assume that he or she is reallyinterested in it. Another component of real listening is listeningnot just to words but to tones of voice. I once mentioned D.H. Lawrence to a friend. To my astonishment, she launched into an academic discussion of the imagery in Lawrence's works. Midway through, I listened to her voice. It was, to put it mildly, unanimated, and it seemed obvious that the imagery monologue was intended solely for my benefit, and I quickly changed the subject. At last, real listening means using your eyes as well as your ears. When your gaze wanders, it makes people think they're boring your, or what they are saying is not interesting. Of course, you don't have to stare, or glare at them. Simply looking attentive will make most people think that you think they're fascinating. Next, good talkers are not afraid to laugh. If you think of all the people you know who make you feel comfortable, you may notice that all of them laugh a lot. Laughter is not only warming and friendly, it's also a good wayto ease other people's discomfort. I have a friend who might enjoy watching at gathering of other people who do not know each other well. The first few minutes of talk are a bit uneasy and hesitant, for the people involved do not yet have a sense of each other. Invariably, alight comment or joke is made, and my friend's easy laughter appears like sunshine in the conversation. There is always then a visible softening that takes place. Other people smile, and loosen in response to her laughter, and the conversation goes on with more warmth and ease.Finally, good talkers are onces who cement a parting. That is, they know how to make use of parting as a way to leave adeep impression on others. Last impressions are just as important as first impressions in determining how a new acquaintance will remember you. People who make others really feel comfortable take advantage of that parting moment to close the deal. Men have had it easier. They have done it with a smile, and a good firm handshake. What about women then Over the last several years, women have started to take over that custom well between themselves or with men. If you'resaying goodbye, you might want to give him or her a second extra hand squeeze. It's a way to say, I really enjoyed meeting you. But it'snot all done with body language. If you've enjoyed being with someone, if you want to see that person again, don't keep it a secret. Let people know how you feel, and they may walk away feeling as ifthey've known you half their life. Okay, just to sum up. Today, we've talked about four ways to make people feel at ease in conversations. These skills are important in keeping conversations going, and in forming friendships later on. Of course, these skills are by no means the only ones we can use. the list is much longer. I hope you willuse these four skills, and discover more on your own in your conversations with other people. Now you have two minutes to check your notes, and then please complete the 15 minute gap filling taskon Answer Sheet One.This is the end of listening comprehension.试题Part Ⅰ Listening Comprehension (40 min)In Sections A,B and C you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. Mark the correct answer to each question on your colored answer sheet.SECTION A TALKQuestions 1 to 5 refer to the talk in this section. At the end of the talk you will be given 75 seconds to answer the questions. Now listen to the talk.1. The parallel between waltzing and language use lies in ____.A. the coordination based on individual actionsB. the number of individual participantsC. the necessity of individual actionsD. the requirements for participants2. In the talk the speaker thinks that language use is a(n) ____ process.A. individualB. combinedC. distinctD. social3. The main difference between personal and non-personal settings is in ____.A. the manner of language useB. the topic and content of speechC. the interactions between speaker and audienceD. the relationship between speaker and audience4. In fictional settings, speakers ____.A. hide their real intentionsB. voice others' intentionsC. play double roles on and off stageD. only imitate other people in life5. Compared with other types of settings, the main feature of private setting is ____.A. the absence of spontaneityB. the presence of individual actionsC. the lack of real intentionsD. the absence of audienceSECTION B INTERVIEWQuestions 6 to 10 are based on an interview. At the end of the interview you will be given 75 seconds to answer the questions. Now listen to the interview.6. What was education like in Professor Wang's daysA. Students worked very hard.B. Students felt they needed a second degree.C. Education was not career－oriented.D. There were many specialized subjects.7. According to Professor Wang, what is the purpose of the present－day educationA. To turn out an adequate number of elite for the society.B. To prepare students for their future career.C. To offer practical and utilitarian courses in each programme.D. To set up as many technical institutions as possible.8. In Professor Wang's opinion, technical skills ____.A. require good educationB. are secondary to educationC. don't call for good educationD. don't conflict with education9. What does Professor Wang suggest to cope with the situation caused by increasing numbers of fee-paying studentsA. Shifting from one programme to another.B. Working out ways to reduce student number.C. Emphasizing better quality of education.D. Setting up stricter examination standards.10. Future education needs to produce graduates of all the following categories EXCEPT ____.A. those who can adapt to different professionsB. those who have a high flexibility of mindC. those who are thinkers, historians and philosophersD. those who possess only highly specialized skillsSECTION C NEWS BROADCASTQuestions 11 to 13 are based on the following news. At the end of the news item, you will be given 45 seconds to answer the questions. Now listen to the news.11. Which of the following regions in the world will witness the sharpest drop in life expectancyA. Latin America.B. Sub Saharan Africa.C. Asia.D. The Caribbean.12. According to the news, which country will experience small life expectancy dropA. Burma.B. Botswana.C. Cambodia.D. Thailand.13. The countries that are predicted to experience negative population growth are mainly in ____ .A. Asia.B. Africa.C. Latin America.D. The Caribbean.Questions 14 and 15 are based on the following news. At the end of the news item, you will be given 30 seconds to answer the questions. Now listen to the news.14. The trade dispute between the European Union and the US was caused by ____. refusal to accept arbitration by WTO imposing tariffs on European steel refusal to pay compensation to EU refusal to lower import duties on EU products15. Who will be consulted first before the EU list is submitted to WTOA. EU member states.B. The United States.C. WTO.D. The steel corporations.SECTION D NOTE-TAKING AND GAP-FILLINGIn this section you will hear a mini-lecture ONCE ONLY. While listening to the lecture, take notes on the important points. Your notes will not be marked, but you will need them to complete a 15-minute gap-filling task on ANSWER SHEET ONE after the mini-lecture. Use the blank paper for note-taking. Fill in each of the gaps with one word. You may refer to your notes. Make sure the word you fill in is both grammatically and semantically acceptable.Conversation SkillsPeople who usually make us feel comfortable in conversations are good talkers. And they have something in common, i.e. skills to put people at ease.1. Skill to ask question1) be aware of the human nature: readiness to answer other's questions regardless of (1)____2) start a conversation with some personal but unharmful questions about one's (2)____ job.questions about one's activities in the (3)____3) be able to spot signals for further talk2. Skill to (4)____for answers1) don't shift from subject to subject-sticking to the same subject: signs of (5)____in conversation.2) listen to (6)____of voice - If people sound unenthusiastic, then change subject.3) use eyes and ears - steady your gaze while listening3. Skill to laughEffects of laughter:- ease people's (7)____- help start (8)____4. Skill to part1) importance: open up possibilities for future friendship or contact2) ways:- men: a smile, a (9)____- women: same as (10)____ now- how to express pleasure in meeting someone.(1) ______ (2) ______ (3) ______ (4) ______ ( 5 ) ______(6) ______ (7) ______ (8) ______ (9) ______ (10) ______PART II PROOFREADING AND ERROR CORRECTION (15 MIN)The following passage contains TEN errors. Each line contains a maximum of one error and three are free from error. In each case, only one word is involved. You should proofread the passage and correct it in the following way.For a wrong word, underline the wrong word and write the correct one in the blank provided at the end of the line.For a missing word, mark the position of the missing word with a “∧” sign and write the word you believe to be missing in the b lank provided at the end of the line.For an unnecessary word, cross out the unnecessary word with a slash “／” and put the word in the blank provided at the end of the line.If the line is correct, place a V in the blank provided at the end of the lineExampleWhen ^ art museum wants a new exhibit, (1) anIt never buys things in finished form and bangs (2) neverthem on the wall. When a natural history museum (3) vwants an exhibition, it must often build it. (4) exhibitProofread the given passage on ANSWER SHEET TWO as instructed.One of the most important non-legislative functions of the U.S Congressis the power to investigate. This power is usually delegated to committees - eitherstanding committees, special committees set for a specific(1)____purpose, or joint committees consisted of members of both houses. (2)____Investigations are held to gather information on the need forfuture legislation, to test the effectiveness of laws already passed,to inquire into the qualifications and performance of members andofficials of the other branches, and in rare occasions, to lay the (3)____groundwork for impeachment proceedings. Frequently, committeesrely outside experts to assist in conducting investigative hearings (4)____and to make out detailed studies of issues. (5)____There are important corollaries to the investigative power. Oneis the power to publicize investigations and its results. Most (6)____committee hearings are open to public and are reported (7)____widely in the mass media. Congressional investigationsnevertheless represent one important tool available to lawmakers (8)____to inform the citizenry and to arouse public interests in national issues. (9)____Congressional committees also have the power to compeltestimony from unwilling witnesses, and to cite for contemptof Congress witnesses who refuse to testify and for perjurythese who give false testimony. (10)____Part Ⅲ Reading Comprehension (30 min)In this section there are four reading passages followed by a total of fifteen multiple-choice questions. Read the passages and then mark your answers on your colored answer sheet.TEXT AFarmers in the developing world hate price fluctuations. It makes it hard to plan ahead. But most of them have little choice: they sell at the price the market sets. Farmers in Europe, the U.S. and Japan are luckier: they receive massive government subsidies in the form of guaranteed prices or direct handouts. Last month U.S. President Bush signed a new farm bill that gives American farmers $190 billion over the next 10 years, or $83 billion more than they had been scheduled to get, and pushes U.S. agricultural support close to crazy European levels. Bush said the step was necessary to "promote farmer independence and preserve the farm way of life for generations". It is also designed to help the Republican Party win control of the Senate in November's mid term elections.Agricultural production in most poor countries accounts for up to 50% of GDP, compared to only 3% in rich countries. But most farmers in poor countries grow just enough for themselves and their families. Those who try exporting to the West find their goods whacked with huge tariffs or competing against cheaper subsidized goods. In 1999 the United Nations Conference on Trade and Development concluded that。
计算机c语言期末考试卷八
后，变量c 的数据类型是（ D ）.A ．intB ．charC ．float D. double10．设n=10,i=4,则赋值运算“n%=i+1”执行后的n 值是（ A ）. A ．0 B.1 C ．2 D.3二．写程序运行结果（每题6，共18分）1.#include<stdio.h> main( ) {int s=0,i; i=1;while (i<=100) {s=s+i; i++;if (s>20) Break; }p rintf(“%d \n”,s); }运行结果: 212.#include<stdio.h> main(){int i=5,a=0; switch(i){case 1:a+=1;case 2:a+=2;break; case 3:a+=3; default:a+=4; }printf("%d\n",a);}运行结果:43.#include<stdio.h>main(){int i;i=1;while(i<=10){if(i%4==0)break;printf(“%d\n”,i);i++;}}运行结果:123三．程序填空（每题8分，共16分）1.我国1994年的人口是12亿,假设当时没有计划生育，按5%的年增长,那一年达到20亿？#include<stdio.h>main( ){int year;float s;year=1994;s=12;while (__s<20__) {year++;__s=s*1.05__;}printf(“year=%d\n”,year);}2.下面程序的功能是输出所有的水仙花数,填充程序空白处. #include<stdio.h>main(){int m,x,y,z;for(m=100;m<=999;m++){x=m/100;y=___m/10%10__;z=__m%10__;if(m==x*x*x+y*y*y+z*z*z)printf("%d\n",m);}}四．流程图（每题10分，共10分）1根据流程图写出对应的程序.#include<stdio.h> main() {int s,i; s=0; i=1; do{s=s+i; i++;} while(i<=100); printf(“s=%d\n ”,s);}五．编程题（每题12分，共36分）1.编写程序按公式c=2(a+b)求平行四边形周长. #include<stdio.h> main() {float a,b,c; printf(“a,b=”); scanf(“%f%f ”,&a,&b); c=2*(a+b);printf(“c=%f\n ”,c); }2.编写程序输入一个分数x(0--100)按下列情况输出其属于那个级别. x ≥80 优秀 60≤x<80 中等 x<60 不及格 #include<stdio.h> main() {float x; printf(“x=”);scanf(“%f ”,&x); if(x>=80)printf(“优秀”);else if(x>=60)printf(“中等”);else printf(“不及格”);}3.某班50人，编写程序输入该班级某门课程的成绩存入数组a,求该班级课程平均分.#include<stdio.h>main(){float a[50],sum,aver;int i;for(i=0;i<50;i++)scanf(“%f”,&a[i]);sum=0;for(i=0;i<50;i++)sum=sum+a[i];aver=sum/50;printf(“平均=%5.2f\n”,aver);}。
炎德 英才大联考湖南省雅礼中学 2024届高三月考试卷(八)
炎德·英才大联考湖南省雅礼中学 2024届高三月考试卷(八)注意事项:1.答卷前,考生务必将自己的姓名、考生号、考场号、座位号填写在答题卡上。
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,将本试卷和答题卡一并交回。
第一部分听力(共两节,满分30分)做题时,先将答案标在试卷上。
录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。
第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话。
每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项。
听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
例:How much is the shirt?A. £ 19.15.B. £ 9.18.C. £9.15.答案是C。
1. What programs does the man generally listen to?A. News.B. Talk shows.C. Education programs2. What will Carl do?A. Buy some steak.B. Bring some wine.C. Cook dinner.3.Where is probably George now?A. On the plane.B. In a car.C. At home.4. Where does the man most likely live?A. In Canada.B. In New York.C. In California.5. What is the man speaker's feeling in the end?A. SurpriseB. Relief.C. Sympathy第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。
英语试卷八年级【含答案】
英语试卷八年级【含答案】专业课原理概述部分一、选择题（每题1分，共5分）1. 下列哪个单词的发音与其他选项不同？A. catB. dogC. fishD. horse2. 选择正确的单词填空：I _______ (like/likes) to read books in my free time.A. likeB. likes3.下列哪个词是过去式？A. walkB. walkedC. walkingD. walks4. 选择正确的单词填空：She _______ (go/goes) to school bus every day.A. goB. goes5.下列哪个单词是复数形式？A. childB. childrenC. childsD. childes二、判断题（每题1分，共5分）1. English is the most spoken language in the world. ( )2. "I am" is always followed a noun. ( )3. The past tense of "write" is "wrote". ( )4. "He" and "she" are both subjective pronouns. ( )5. Adjectives always e before nouns in a sentence. ( )三、填空题（每题1分，共5分）1. I _______ (to be) a teacher when I grow up.2. She _______ (to go) to the supermarket yesterday.3. The cat _______ (to sit) on the mat.4. We _______ (to watch) a movie tonight.5. They _______ (to travel) around the world last year.四、简答题（每题2分，共10分）1. What is the difference between "a" and "an"?2. What is the past tense of "eat"?3. What is the plural form of "mouse"?4. What is an adjective?5. What is the opposite of "big"?五、应用题（每题2分，共10分）1. Write a sentence using the word "because".2. Write a sentence using the word "if".3. Write a sentence using the word "while".4. Write a sentence using the word "although".5. Write a sentence using the word "until".六、分析题（每题5分，共10分）1. Analyze the following sentence: "The sun sets in the west."2. Analyze the following sentence: "She can play the piano."七、实践操作题（每题5分，共10分）1. Write a short paragraph (at least 3 sentences) about your favorite hob.2. Write a short dialogue (at least 5 exchanges) between two people discussing their favorite movies.八、专业设计题（每题2分，共10分）1. 设计一个英语学习APP的用户界面，要求包含单词学习、语法练习和听力训练三个模块。
八年级全册全套试卷测试卷附答案
八年级全册全套试卷测试卷附答案一、八年级数学三角形填空题（难）1．如图，△AEF 是直角三角形，∠AEF=900，B 为AE 上一点，BG⊥AE 于点B ，GF∥BE，且AD ＝BD ＝BF ，∠BFG＝60０，则∠AFG 的度数是___________。
【答案】20°【解析】根据平行线的性质，可知∠A=∠AFG ，∠EBF=∠BFG＝60０，然后根据等腰三角形的性质，可知∠BDF=2∠A ，∠A+∠AFB=3∠A=∠EBF ，因此可得∠AFG=20°. 故答案为：20°.2．已知a ，b ，c 是△ABC 的三边长，a ，b 满足|a ﹣7|+（b ﹣1）2=0，c 为奇数，则c=_____．【答案】7【解析】【分析】根据非负数的性质列式求出a 、b 的值，再根据三角形的任意两边之和大于第三边，两边之差小于第三边求出c 的取值范围，再根据c 是奇数求出c 的值．【详解】∵a ，b 满足|a ﹣7|+（b ﹣1）2=0，∴a ﹣7=0，b ﹣1=0，解得a=7，b=1，∵7﹣1=6，7+1=8，∴68c <<，又∵c 为奇数，∴c=7，故答案为7．【点睛】本题考查非负数的性质：偶次方，解题的关键是明确题意，明确三角形三边的关系．3．两个完全相同的正五边形都有一边在直线l 上，且有一个公共顶点O ，其摆放方式如图所示，则∠AOB 等于 ______ 度．【答案】108°【解析】【分析】如图，易得△OCD为等腰三角形，根据正五边形内角度数可求出∠OCD，然后求出顶角∠COD，再用360°减去∠AOC、∠BOD、∠COD即可【详解】∵五边形是正五边形，∴每一个内角都是108°，∴∠OCD=∠ODC=180°-108°=72°，∴∠COD=36°，∴∠AOB=360°-108°-108°-36°=108°.故答案为108°【点睛】本题考查正多边形的内角计算，分析出△OCD是等腰三角形，然后求出顶角是关键.4．如图，△ABC中，∠BAC＝70°，∠ABC的平分线与∠ACB的外角平分线交于点O，则∠BOC＝_____度．【答案】35【解析】【分析】根据三角形的一个外角等于与它不相邻的两个内角的和可得∠BAC+∠ABC＝∠ACE，∠BOC+∠OBC＝∠OCE，再根据角平分线的定义可得∠OBC＝12∠ABC，∠OCE＝1 2∠ACE，然后整理可得∠BOC＝12∠BAC．【详解】解：由三角形的外角性质，∠BAC+∠ABC＝∠ACE，∠BOC+∠OBC＝∠OCE，∵∠ABC的平分线与∠ACB的外角平分线交于点O，∴∠OBC＝12∠ABC，∠OCE＝12∠ACE，∴12（∠BAC+∠ABC）＝∠BOC+12∠ABC，∴∠BOC＝12∠BAC，∵∠BAC＝70°，∴∠BOC＝35°，故答案为：35°．【点睛】本题考查了三角形的内角和定理、三角形的外角性质，掌握三角形的一个外角等于与它不相邻的两个内角的和的性质，要注意整体思想的利用．5．如图所示，在四边形ABCD中，AD⊥AB，∠C=110°，它的一个外角∠ADE=60°，则∠B 的大小是_____．【答案】40°【解析】【分析】根据外角的概念求出∠ADC的度数，再根据垂直的定义、四边形的内角和等于360°进行求解即可得.【详解】∵∠ADE=60°，∴∠ADC=120°，∵AD⊥AB，∴∠DAB=90°，∴∠B=360°﹣∠C﹣∠ADC﹣∠A=40°，故答案为40°．【点睛】本题考查了多边形的内角和外角，掌握四边形的内角和等于360°、外角的概念是解题的关键．6．如图，小新从A点出发，沿直线前进50米后向左转30°，再沿直线前进50米，又向左转30°，…照这样下去，小新第一次回到出发地A点时，一共走了__米．【答案】600【解析】【分析】【详解】解：根据题意可知：小新从A点出发，沿直线前进50米后向左转30º，再沿直线前进50米，又向左转30º，……照这样下去,小新第一次回到出发地A点时,小新走的路线围成一个正多边形,且这个多边形的外角等于30º，所以这个正多边形的边数是12，小新一共走了12×50=600米，故答案为：600．二、八年级数学三角形选择题（难）7．如图，把△ABC纸片沿DE折叠，当点A在四边形BCDE的外部时，记∠AEB为∠1，∠ADC为∠2，则∠A、∠1与∠2的数量关系，结论正确的是（）A．∠1＝∠2＋∠A B．∠1＝2∠A＋∠2C．∠1＝2∠2＋2∠A D．2∠1＝∠2＋∠A【答案】B【解析】试题分析：如图在∆ABC中，∠A+∠B+∠C=180°，折叠之后在∆ADF中，∠A+∠2+∠3=180°，∴∠B+∠C=∠2+∠3，∠3=180°-∠A-∠2，又在四边形BCFE中∠B+∠C+∠1+∠3=360°，∴∠2+∠3+∠1+∠3=360°∴∠2+∠1+2∠3=∠2+∠1+2（180°-∠A-∠2）=360°，∴∠2+∠1-2∠A-2∠2=0，∴∠1＝2∠A＋∠2.故选B点睛：本题主要考查考生对三角形内角和，四边形内角和以及三角形外角的性质：三角形的一个外角等于与它不相邻的两个内角和的理解及掌握。
第九大类模拟试卷八答案
第九大类模拟试卷八答案1、全球一共有几个主要的气候带？( )A、4B、5(正确答案)C、5D、72、下面作品中哪一篇是安徒生的童话()A、快乐王子B、绿野仙踪C、爱丽丝漫游仙境D、豌豆上的公主(正确答案)3、我国是最早观测记录哈雷替星的国家。
从公元前240年起，哈雷彗星的每次出现，中国都有记录。
中国最早一次记录文献是在A、春秋(正确答案)B、史记C、《淮南子•兵略训》D、《汉书》4、中国海拔最高的城市是？A、昆明B、西宁C、拉萨(正确答案)D、贵阳5、我国最早的天文台建于A.唐代B.元代(正确答案)C宋代6、著名的可口可乐公司的总部设在美国的A、纽约B、费城C芝加哥D、洛杉机E、亚特兰大(正确答案)7、距今6亿年左右，地球环境发生了一次灾难性的巨变，造成77%的生物物种灭绝，但却导致了以下哪种动物的兴起?A、无脊椎动物(正确答案)B、爬行动物C、哺乳动物D、灵长类动物8、被石油污染的海域，可导致海洋生物的死亡。
如果要完全恢复海水的原状，一般需要几年?A、3年以上B、5年以上C、7年以上(正确答案)9、地球表面被70%的水所覆盖，只有3%为淡水。
请问分布在地球南极和北极淡水的百分比是多少?A、0.5%B、1%C、1.5%D、2%(正确答案)10、“生活好比旅行，理想是旅行的路线，失去了路线，只好停止前进”。
这句话是谁说的?A、马克思B、雨果(正确答案)11、一头狮子一年可吃掉多少匹斑马?A、20-60匹(正确答案)B、90-120匹C、140-180匹12、请问太阳每年提供给地球的辐射能，约有百分之几转化成了风能?A、2%(正确答案)B、4%C、6%13、哥白尼曾著有光辉巨著《天体运行论》请问他是哪国人?A、意大利B、瑞典C、古罗马D、波兰(正确答案)14、如果在北极上空看地球，你会发现地球按逆时针方向转动，而在南极上空，却发现地球顺时针转动，请问这是谁的作用?A、地球间的磁场B、地球的自转(正确答案)C、地球的公转15、请问土星自转一周大约需要几个小时?A、10小时(正确答案)B、16小时C、20小时D、24小时16、请问地球上一年四季的形成，与下列哪个因素有关?A、地球距太阳的远近B、地轴的倾斜(正确答案)17、请问以下能源哪个属于“二次能源”?A、风能B、地热C、汽油(正确答案)D、太阳能18、请问以下能源中，哪个能源可共人类利用的时间更长久?A、煤炭B、石油C、天然气D、核能(正确答案)19、半坡遗址属于以下哪个时代?A、新石器时代(正确答案)B、中石器时代C、旧石器时代20、影响我们身体健康的主要病种中哪种病是第一位?A、心血管病(正确答案)B、传染病C、癌症21、台球运动起源干于哪个国家?A、英国(正确答案)B、法国C、美国D、德国22、世界上主要的牛肉出口国是？A、澳大利亚B、新西兰C、美国D、阿根廷(正确答案)23、故宫博物院的北门原称“玄武门”后改称“神武门”，更改的原因是A、重修后图吉利B、为避某人的名讳(正确答案)24、最轻的金属是A、铝B、镁C、锌D、锂(正确答案)25、我国第一条高速公路是A、沪嘉高速公路(正确答案)B、京津塘高速公路C、沪宁高速公路D、京石高速公路26、“图书“的原意是A、地图书籍(正确答案)B、地图书籍27、“孺子牛”的“孺子”是A、人名(正确答案)B、动物名28、“晦气”原指A、花匠B、木匠C、铁匠D、厨师(正确答案)E、裁缝29、碰杯的礼节来自于A、古埃及B、古希腊(正确答案)C、巴比伦30、“道--琼斯指数”中的“道--琼斯”是A、两个美国人姓的组合(正确答案)B、两个美国人名的组合31、最热的海:A、黑海B、里海C、红海(正确答案)32、世界海拔最高的洲是A、亚洲B、非洲C、南美洲D、大洋州E、南极洲(正确答案)33、皇城就是紫禁城A、对(正确答案)B、不对34、“孩提”时代指的是A、0-3岁B、1-3岁(正确答案)C、2-4岁35、“别来无恙”的“恙”在古时是A、虫子(正确答案)B、病C、人D、食物36、大写数字“壹”的原意A、第一B、专一(正确答案)C、唯一37、大写数字“贰”的原意:A、第二B、背叛(正确答案)C、反对38、大写数字“玖”的原意A、第九B、长久C、美石(正确答案)39、“生意”的原意A、买卖B、生机之意(正确答案)C、生命的章义40、国际法庭总部设在A、卢森堡B、维也纳C、海牙(正确答案)41、海岸线最长的国家是A、美国B、加拿大(正确答案)C、印度尼西亚D、澳大利亚42、生物界的一切食物连都由什么开始?A、植物(正确答案)B、动物43、“己所不欲，勿施欲人”是谁说的?A、孔子(正确答案)B、孟子C、老子D、荀子44、“采菊东篇下，悠然见南山”的诗作者是A、苏轼B、陆游C、李白D、陶渊明(正确答案)E、杜甫45、人的一生心脏所泵出的血，足够装满大约多少个标准游泳池A、50B、70C、90D、100(正确答案)E、12046、古今交友有许多称谓，重利忘义之交是指A、忘形之交B、布衣之交C、酒肉之交D、布道之交(正确答案)47、古代建筑中，用来藏舍利和经卷的是:A、庙B、刹C、寺D、祠E、塔(正确答案)48、清朝文武官员的官服上都绣有乌兽图案，它是代表官阶的高低，请问一品文官绣的是A、孔雀B、锦鸡C、鹤(正确答案)E、雁49、中国旅游的标致是A、长城B、秦兵马俑C、铜奔马(正确答案)D、大能猫50、成语“祸起萧墙”的“萧墙”指的是A、萧太后的宫闱B、宫内的矮墙(正确答案)C、长着草的墙51、“趋之若骛”的“蝥”指的是什么A、鸭子(正确答案)B、暨鸶C、大雁52、中国历史上出现过许多娃娃皇帝，请问最小的是那一位A、东汉殇帝(正确答案)B、东汉冲帝C、北魏孝文帝D、清朝光绪53、著名的歌曲《延安颂》的作者是:A、聂耳B、马可C、冼星海D、郑律成(正确答案)54、下列农作物中，哪个原产于中国?A、小麦B、玉米D、谷子(正确答案)55、在鲁迅的下列作品中，哪一篇不是用第一人称写的A、《社戏》B、《故乡》C、《风波》(正确答案)D、《祝福》E、《孔乙己》56、“五岳”按海拔高度从高往低依次是A、恒山华山泰山嵩山衡山(正确答案)B、泰山恒山嵩山华山衡山C、华山嵩山泰山恒山衡山D、嵩山泰山恒山衡山华山57、下列果树中哪一种不属于温带果树?A、樱桃B、石榴C、草莓D、柠槿E、杨梅(正确答案)58、下面哪个动物的妊娠期在一年以上?A、虎B、河马C、牦牛D、长颈鹿(正确答案)E、大猩猩59、铜鼓舞是我国哪个少数民族的民间舞蹈?A、苗族B、彝族C、水族D、瑶族(正确答案)E、壮族60、钱塘江大桥是属于下列的哪一种桥A、公路桥B、铁路桥C、公路铁路两用桥(正确答案)61、中华人民共和国的继承法是哪一年颁布的A、1959年B、1979年C、1985年(正确答案)D、1987年62、罗马数字“C”表示A、50B、100(正确答案)C、500D、100063、历史最悠久的首都是A、北京(正确答案)B、大马士革C、埃及64、最早的商标出现在中国的A、唐朝B、宋朝(正确答案)C、元朝D、明朝E、清朝65、蜜蜂看不到什么颜色?A、红色(正确答案)B、兰色C、黄色D、绿色66、书画、书刊的装潢设计我们称之为A、装裱B、装订C、装潢D、装帧(正确答案)67、“万塔之城”是哪个国家的城市的雅称:A、老挝B、泰国C、柬埔寨D、缅甸(正确答案)68、中国是一个尊师重教的国家，从古至今曾经有过多少个教师节A、3B、4(正确答案)C、5D、669、我国绘画史上的“宋四家”是A、蔡襄、黄庭坚、米芾、苏轼(正确答案)B、王维、王冕、唐寅、沈固70、世界上最早使用麻醉剂的是我国的哪一位名医?A、扁鹊B、华佗(正确答案)C、张仲景71、“沉鱼落雁，闭月羞花”是形容女子的美貌的，请问“落雁”指的是谁:A、西施(正确答案)C、貂禅D、杨贵妃72、人体最大的关节是哪个A、肩关节(正确答案)B、膝关节C、关节73、搭脉是中医诊断的重要手段，下列那个脉象是正常脉象A、浮脉B、数脉C、实脉D、平脉(正确答案)74、世界卫生组织规定健康新标准是A、不生病、吃的好、睡的香B、身体健康、头脑清楚、行动自如C、身体健康、心理健康、社会适应能力良好(正确答案)75、“六一国际儿童节”是哪一年确定下来的A、1949 年(正确答案)B、1945年C、1939年76、哪种宝石的硬度仅次于钻石?A、红宝石B、绿宝石C、蓝宝石(正确答案)77、地球表面的风由什么引起的?A、位置不同B、温度不同(正确答案)78、太阳系中的九大行星，哪颗最大?B、木星(正确答案)C、水星D、火星E、土星79、地球上唯一的双层海是A、红海B、里海C、黑海(正确答案)D、波罗的海80、海市屋楼是由于大气中光线的什么作用而形成的一种自然现象?A、反射B、折射(正确答案)C、衍射81、“侃侃而谈”的“侃”意思为:A、刚直(正确答案)B、戏弄82、“昆明”最早是:A、城市名B、地名C、人名D、民族名称(正确答案)83、“巴黎”的名字来源于A、人名(正确答案)B、地名C、建筑物84、请问《格萨尔传奇》属于叙事诗中的哪一种?A、故事诗C、史诗(正确答案)D、英雄颂歌85、俄国有一位作家的作品，被列宁赞誉为“俄国革命的镜子”，他是谁?A、普希金B、果戈理C、托尔斯泰(正确答案)D、高尔基E、奥斯特洛夫斯基86、世界四大“大陆桥”之一的亚欧大陆桥有多长A、1000千米B、3500千米C、4500千米D、10800千米(正确答案)87、中国纺织名品“云锦”的产于何处A、江苏(正确答案)B、浙江C、福建D、云南88、在国际上通常将酒精积分多少的饮料酒称为烈性酒A、35%以上B、38%以上(正确答案)C、40%以上D、50%以上89、古时认为“民为贵”“君为轻”的思想家是A、孟子(正确答案)B、庄子C、墨子90、秦长城连接了战国时期三国的长城，这三国是A、韩赵魏B、秦赵燕C、赵燕齐(正确答案)D、秦燕齐91、书法艺术始于我国A、西汉B、东汉(正确答案)C、三国D、南北朝92、赵州桥建造于A、北朝时期B、隋唐(正确答案)C、北魏D、晋代93、我国少数民族中的回族形成于A、唐朝B、五代C、宋代D、元代(正确答案)94、满族的祖先是A、女真族(正确答案)B、契丹族C、蒙古族D、鲜卑族95、中国古代版图最大的朝代是A、清朝C、元朝(正确答案)D、唐朝96、印度最大的港口和棉纺织工业中心是A、加尔各答B、马德拉斯C、孟买(正确答案)D、新德里97、澳大利亚储藏量居世界各国首位的矿产资源是A、煤矿B、优质铁矿C、铀矿(正确答案)D、铜矿98、下列著名人物中，独创了地质力学的理论和方法的是A、苏步青B、李四光(正确答案)C、陶行知D、邹韬奋99、下列著名人物中，提出生活教育理论的是A、苏步青B、李四光C、陶行知(正确答案)D、邹韬奋100、下列著名人物中，主办了生活书店的是A、苏步青B、李四光C、陶行知D、邹韬奋(正确答案)。
八年级数学试卷全部
一、选择题（每题3分，共30分）1. 下列各数中，不是有理数的是（）A. -2B. √4C. πD. 0.52. 下列各数中，有最大值的是（）A. 2B. -3C. 0D. -23. 若a、b、c是等差数列，且a+b+c=0，则下列选项正确的是（）A. a=b=cB. a+b=0C. b=0D. c=04. 下列函数中，是反比例函数的是（）A. y=2x+1B. y=x²C. y=2/xD. y=35. 已知等腰三角形ABC中，AB=AC，且∠B=40°，则∠C的度数是（）A. 40°B. 50°C. 60°D. 70°6. 在直角坐标系中，点P（-3，2）关于y轴的对称点P'的坐标是（）A. (-3, -2)B. (3, -2)C. (3, 2)D. (-3, 2)7. 若x²-5x+6=0，则x的值是（）A. 2B. 3C. 2或3D. 无解8. 下列图形中，是轴对称图形的是（）A. 正方形B. 等腰三角形C. 平行四边形D. 梯形9. 已知三角形ABC中，∠A=60°，∠B=45°，则∠C的度数是（）A. 45°B. 60°C. 75°D. 90°10. 下列各数中，是质数的是（）A. 16B. 17C. 18D. 19二、填空题（每题3分，共30分）11. 计算：3.14 × 2.5 ÷ 1.25 = ______12. 等差数列1，4，7，……的第10项是 ______13. 已知x²-4x+4=0，则x的值是 ______14. 下列函数中，是正比例函数的是 y = ______15. 已知等腰三角形ABC中，AB=AC，且底边BC=6cm，则腰AB的长度是 ______cm16. 在直角坐标系中，点A（2，3）关于x轴的对称点A'的坐标是 ______17. 若a²+b²=c²，则a、b、c构成一个 ______18. 下列各数中，是勾股数的是 ______19. 已知∠A=30°，∠B=60°，则∠C的度数是 ______20. 下列各数中，是立方数的是 ______三、解答题（每题10分，共40分）21. 解方程：2x-3=722. 已知等差数列{an}中，a1=2，d=3，求第10项an23. 已知函数y=2x-3，求x=4时的函数值24. 在直角坐标系中，已知点A（-2，3）和B（4，-1），求线段AB的中点坐标25. 已知三角形ABC中，AB=AC，且∠B=45°，求∠C的度数。
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