江苏省如皋中学11-12学年高二上学期质量检测英语试题(国际班,无答案).pdf
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2024—2025学年度高一年级第一学期教学质量调研(二)英语试题注意事项: 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指定位置,在其他位置作答一律无效。
3. 本卷满分为150分,考试时间为120分钟。
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。
1. What is the relationship between the speakersA. Colleagues.B. Doctor and patient.C. Classmates.2. Where does the conversation take placeA. Over the phone.B. At a park.C. In a restaurant.3. How many apples did Charlie eatA.4.B.3.C.1.4. What did the man's wife lose yesterdayA. A bag.B. A jacket.C. A pair of gloves.5. What are the speakers mainly talking aboutA. An award.B. A composer(作曲家).C. A live performance.第二节听下面5段对话或独白。
每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项。
课 题教学设计教 学 目 标知识与能力使学生了解一元一次不等式的概念理解和掌握不等式的基本性质,并会灵活利用其进行变形。
过程与方法通过自主探索或试验、归纳的方法,得到不等式基本性质,并会在不等式的变形中正确应用。
会利用不等式的基本性质解一些简单的不等式,注意与一元一次方程解法做比较。
情感、态度、价值观通过自主探究体会到不等式与方程的类似与不同之处,感受不等式解法的实际应用,进一步认识到数学是解决实际问题和进行交流的工具。
教 学 策 略教法选择互动教学学法选择以小组学习探究的形式课堂组织形式学生探索、共同讨论、交流,老师点播教具媒体组合应用多媒体课件、实物投影课程资源开发利用教学过程(内容及步骤)教法与学法一、创设情境,探究问题 在解一元一次方程时,我们主要是对方程进行变形。
在研究解不等式时,我们同样应先探究不等式的变形规律。
如图8.2.3所示,一个倾斜的天平两边分别放有重物,其质量分别为a和b,从天平实验看,显然a>b, [问题一]: 如果在两边盘内分别加上等量的砝码c,那么天平会发生什么变化?如果把砝码c拿出来呢? 以生活情景引入新课,激发学生探索新知的愿望和学习兴趣。
思考、小组交流,进行概括表述。
教学过程(内容及步骤)教法与学法不等式的性质1 如果a>b,那么a+c>b+c,a-c>b-c 这就是说,不等式的两边都加上(或减去)同一个数或同一个整式,不等号的方向不变。
图8.2.3……………………………………………… 从中你能发现什么? [概括]: 不等式的性质2如果a>b,并且c>0,那么ac>bc。
不等式的性质3如果a>b,并且c<0,那么aca或x-3;(2)-2x(-3)×2, 得 x>-6。
(2)不等式的两边都除以-2(即乘以-),不等式的方向改变,所以 -2x×(-)>6×(-), 得 x>-3。
江苏省如皋中学2011~2012学年度第一学期质量检测高二英语(国际班)Part I Reading Comprehension (Skimming and Scanning) (15 minutes) Directions:In this part, you will have 15 minutes to go over the passage quickly and answer the questions For questions 1-7, choose the best answerfrom the four choices marked A), B), C) and D). For questions 8-10,complete the sentences with the information given in the passage.Minority ReportAmerican universities are accepting more minorities than ever. Graduating them is another matter.Barry Mills, the president of Bowdoin College, was justifiably proud of Bowdoin's efforts to recruit minority students. Since 2003 the small, elite liberal arts school in Brunswick, Maine, has boosted the proportion of so-called under-represented minority students in entering freshman classes from 8% to 13%. "It is our responsibility to reach out and attract students to come to our kinds of places," he told a NEWSWEEK reporter. But Bowdoin has not done quite as well when it comes to actually graduating minorities. While 9 out of 10 white students routinely get their diplomas within six years, only 7 out of 10 black students made it to graduation day in several recent classes."If you look at who enters college, it now looks like America," says Hilary Pennington, director of postsecondary programs for the Bill & Melinda Gates Foundation, which has closely studied enrollment patterns in higher education. "But if you look at who walks across the stage for a diploma, it's still largely the white, upper-income population."The United States once had the highest graduation rate of any nation. Now it stands 10th. For the first time in American history, there is the risk that the rising generation will be less well educated than the previous one. The graduation rate among 25- to 34-year-olds is no better than the rate for the 55- to 64-year-olds who were going to college more than 30 years ago. Studies show that more and more poor and non-white students want to graduate from college –but their graduation rates fall far short of their dreams. The graduation rates for blacks, Latinos, and Native Americans lag far behind the graduation rates for whites and Asians. As the minority population grows in the United States, low college graduation rates become a threat to national prosperity.The problem is pronounced at public universities. In 2007 the University of▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓Wisconsin-Madison –one of the top five or so prestigious public universities –graduated 81% of its white students within six years, but only 56% of its blacks. At less-selective state schools, the numbers get worse. During the same time frame, the University of Northern Iowa graduated 67% of its white students, but only 39% of its blacks. Community colleges have low graduation rates generally –but rock-bottom rates for minorities. A recent review of California community colleges found that while a third of the Asian students picked up their degrees, only 15% of African-Americans did so as well.Private colleges and universities generally do better, partly because they offer smaller classes and more personal attention. But when it comes to a significant graduation gap, Bowdoin has company. Nearby Colby College logged an 18-point difference between white and black graduates in 2007 and 25 points in 2006. Middlebury College in Vermont, another top school, had a 19-point gap in 2007 and a 22-point gap in 2006. The most selective private schools –Harvard, Yale, and Princeton –show almost no gap between black and white graduation rates. But that may have more to do with their ability to select the best students. According to data gathered by Harvard Law School professor Lani Guinier, the most selective schools are more likely to choose blacks who have at least one immigrant parent from Africa or the Caribbean than black students who are descendants of American slaves."Higher education has been able to duck this issue for years, particularly the more selective schools, by saying the responsibility is on the individual student," says Pennington of the Gates Foundation. "If they fail, it's their fault." Some critics blame affirmative action – students admitted with lower test scores and grades from shaky high schools often struggle at elite schools. But a bigger problem may be that poor high schools often send their students to colleges for which they are "undermatched": they could get into more elite, richer schools, but instead go to community colleges and low-rated state schools that lack the resources to help them. Some schools out for profit cynically increase tuitions and count on student loans and federal aid to foot the bill –knowing full well that the students won't make it. "The school keeps the money, but the kid leaves with loads of debt and no degree and no ability to get a better job. Colleges are not holding up their end," says Amy Wilkins of the Education Trust.A college education is getting ever more expensive. Since 1982 tuitions have been rising at roughly twice the rate of inflation. In 2008 the net cost of attending a four-year public university –after financial aid –equaled 28% of median (中间的)family income, while a four-year private university cost 76% of median family income. More and more scholarships are based on merit, not need. Poorer students are not always the best-informed consumers. Often they wind up deeply in debt or simply unable to pay▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓after a year or two and must drop out.There once was a time when universities took pride in their dropout rates. Professors would begin the year by saying, "Look to the right and look to the left. One of you is not going to be here by the end of the year." But such a Darwinian spirit is beginning to give way as at least a few colleges face up to the graduation gap. At the University of Wisconsin-Madison, the gap has been roughly halved over the last three years. The university has poured resources into peer counseling to help students from inner-city schools adjust to the rigor (严格要求)and faster pace of a university classroom –and also to help minority students overcome the stereotype that they are less qualified. Wisconsin has a "laserlike focus" on building up student skills in the first three months, according to vice provost (教务长)Damon Williams.State and federal governments could sharpen that focus everywhere by broadly publishing minority graduation rates. For years private colleges such as Princeton and MIT have had success bringing minorities onto campus in the summer before freshman year to give them some preparatory courses. The newer trend is to start recruiting poor and non-white students as early as the seventh grade, using innovative tools to identify kids with sophisticated verbal skills. Such programs can be expensive, of course, but cheap compared with the millions already invested in scholarships and grants for kids who have little chance to graduate without special support.With effort and money, the graduation gap can be closed. Washington and Lee is a small, selective school in Lexington, V a. Its student body is less than 5% black and less than 2% Latino. While the school usually graduated about 90% of its whites, the graduation rate of its blacks and Latinos had dipped to 63% by 2007. "We went through a dramatic shift," says Dawn Watkins, the vice president for student affairs. The school aggressively pushed mentoring (辅导) of minorities by other students and "partnering" with parents at a special pre-enrollment session. The school had its first-ever black homecoming. Last spring the school graduated the same proportion of minorities as it did whites. If the United States wants to keep up in the global economic race, it will have to pay systematic attention to graduating minorities, not just enrolling them.1. What is the author's main concern about American higher education?A)The small proportion of minority students.B)The low graduation rates of minority students.C)The growing conflicts among ethnic groups.D)The poor academic performance of students.2. What was the pride of President Barry Mills of Bowdoin College?A)The prestige of its liberal arts programs.B)Its ranking among universities in Maine.▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓C)The high graduation rates of its students.D)Its increased enrollment of minority students.3. What is the risk facing America?A)Its schools will be overwhelmed by the growing number of illegalimmigrants.B)The rising generation will be less well educated than the previous one.C)More poor and non-white students will be denied access to college.D)It is going to lose its competitive edge in higher education.4. How many African-American students earned their degrees in Californiacommunity colleges according to a recent review?A)Fifty-six percent.C) Fifteen percent.B)Thirty-nine percent.D) Sixty-seven percent.5. Harvard, Yale, and Princeton show almost no gap between black and whitegraduation rates mainly because .A)their students work harder C) their classes are generallysmallerB)they recruit the best students D) they give students moreattention6. How does Amy Wilkins of the Education Trust view minority students' failure toget a degree?A)Universities are to blame.B)Students don't work hard.C)The government fails to provide the necessary support.D)Affirmative action should be held responsible.7. Why do some students drop out after a year or two according to the author?A)They have lost confidence in themselves.B)They cannot afford the high tuition.C)They cannot adapt to the rigor of the school.D)They fail to develop interest in their studies.8.To tackle the problem of graduation gap, the University of Wisconsin-Madisonhelps minority students get over the stereotype that _______.9.For years, private colleges such as Princeton and MIT have provided minoritystudents with _______ during the summer before freshman year.10.Washington and Lee University is cited as an example to show that the gap ofgraduation rates between whites and minorities can _______.Part II Listening Comprehension (35 minutes)▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓Section ADirections: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A) B) C) and D), and decide which is the best answer.11. A) Get some small change. B) Find a shopping center.C) Cash a check at a bank. D) Find a parking meter.12. A) Shopping with his son. B) Buying a gift for a child.C) Promoting a new product. D) Bargaining with a salesgirl.13. A) Taking photographs. B) Enhancing images.C) Mending cameras. D) Painting pictures.14. A) He moved to Baltimore when he was young.B) He can provide little useful information.C) He will show the woman around Baltimore.D) He will ask someone else to help the woman.15. A) He is rather disappointed. B) He is highly ambitious.C) He can’t face up to the situation.D) He knows his own limitations.16. A) She must have paid a lot for the gym.B) She is known to have a terrific figure.C) Her gym exercise has yielded good results.D) Her effort to keep fit is really praiseworthy.17. A) Female students are unfit for studying physics.B) He can serve as the woman’s tutor.C) Physics is an important course at school.D) The professor’s suggestion is constructive.18. A) Indifferent. B) Doubtful. C) Pleased. D) Surprised.Questions 19 to 22 are based on the conversation you have just heard.19. A) He prefers the smaller evening classes. B) He has signed up for a day course.C) He has to work during the day. D) He finds the evening course cheaper.20. A) Learn a computer language. B) Learn data processing.C) Buy some computer software. D) Buy a few coursebooks.21. A) Thursday evening, from 7:00 to 9:45. B) From September 1 to New Year’s eve.C) Every Monday, lasting for 12 weeks. D) Three hours a week, 45 hours in▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓total.22. A) What to bring for registration. B) Where to attend the class.C) How he can get to Frost Hall. D)Whether he can use a check. Questions 23 to 25 are based on the conversation you have just heard.23. A) A training coach. B) A trading adviser.C) A professional manager. D) A financial trader.24. A) He can save on living expenses. B) He considers cooking creative.C) He can enjoy healthier food. D) He thinks take-away is tasteless.25. A) It is something inevitable. B) It is frustrating sometimes.C) It takes patience to manage. D) It can be a good thing.Section BDirections: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D).Questions 26 to 28 are based on the conversation you have just heard.26. A) There were no planets without moons. B) There was no air or water on Jupiter.C) Life was not possible in outer space. D) The mystery of life could not be resolved.27. A) It has a number of active volcanoes. B) It has an atmosphere like the earth’s.C) It has a large ocean under its surface. D) It has deep caves several miles long.28. A) Light is not an essential element to it. B) Life can form in very hot temperatures.C) Every form of life undergoes evolution. D) Oxygen is not needed for some life forms.Passage TwoQuestions 29 to 31 are based on the passage you have just heard.29. A) Whether they should take the child home. B) What Dr. Meyer’s instructions exactly were.C) Who should take care of the child at home. D) When the child would completely recover.30. A) She encourages them to ask questions when in doubt.B) She makes them write down all her instructions.C) She has them act out what they are to do at home.▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓D) She asks them to repeat what they are supposed to do.31. A) It lacks the stability of the printed word. B) It contains many grammatical errors.C) It is heavily dependent on the context. D) It facilitates interpersonal communication.Passage ThreeQuestions 32 to 35 are based on the passage you have just heard.32. A) Job security. B) Good labour relations.C) Challenging work. D) Attractive wages and benefits.33. A) Many tedious jobs continue to be done manually.B) More and more unskilled workers will lose jobs.C) Computers will change to nature of many jobs.D) Boring jobs will gradually be made enjoyable.34. A) Offer them chances of promotion.B) Improve their working conditions.C) Encourage them to compete with each other.D) Give them responsibilities as part of a team.35. A) They will not bring real benefits to the staff.B) They concern a small number of people only.C) They are arbitrarily set by the administrators.D) They are beyond the control of ordinary workers.Section CDirections: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written.In the humanities, authors write to inform you in many ways. These methods can be (36) into three types of informational writing: factual, descriptive, and process. Factual writing provides (37) information on an author, composer, or artist or on a type of music, literature, or art. Example of factual writing include notes on a book jacket or (38) cover and longer pieces, such as an article describing a style of music which you might read in a music (39) courses. This kind of writing provides a (40) for your study of the humanities.▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓As its name (41), descriptive writing simply describes, or provides an (42) of, a piece of music, art, or literature. For example, descriptive writing might list the colors an artist used in a painting or the (43) a composer included in a musical composition, so as to make pictures or sounds in the reader’s mind by calling up specific details of the work. (44) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.Process writing explains a series of actions that bring about a result. (45) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. This kind of writing is often found in art, where understanding how an artist created a certain effect is important. (46) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Part ⅢReading Comprehension (Reading in Depth) (25 minutes) Section ADirections: In this section, there is a short passage with 5 questions or incomplete statements. Read the passage carefully. Then answer the questions orcomplete the statements in the fewest possible words.Questions 47 to 51 are based on the following passage.How good are you at saying "no"? For many, it's surprisingly difficult. This is especially true of editors, who by nature tend to be eager and engaged participants in everything they do. Consider these scenarios:It's late in the day. That front-page package you've been working on is nearly complete; one last edit and it's finished. Enter the executive editor, who makes a suggestion requiring a more-than-modest rearrangement of the design and the addition of an information box. You want to scream: "No! It's done!" What do you do?The first rule of saying no to the boss is don't say no. She probably has something in mind when she makes suggestions, and it's up to you to find out what. The second rule is don't raise the stakes by challenging her authority. That issue is already decided. The third rule is to be ready to cite options and consequences. The boss's suggestions might be appropriate, but there are always consequences. She might not know about the pages backing up that need attention, or about the designer who had to go home sick. Tell her she can have what she wants, but explain the consequences. Understand what she's trying to accomplish and propose a Plan B that will make it happen without destroying what you've done so far.Here's another case. Your least-favorite reporter suggests a dumb story idea. This one should be easy, but it's not. If you say no, even politely, you risk inhibiting▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓further ideas, not just from that reporter, but from others who heard that you turned down the idea. This scenario is common in newsrooms that lack a systematic way to filter story suggestions.Two steps are necessary. First, you need a system for how stories are proposed and reviewed. Reporters can tolerate rejection of their ideas if they believe they were given a fair hearing. Your gut reaction (本能反应) and dismissive rejection, even of a worthless idea, might not qualify as systematic or fair.Second, the people you work with need to negotiate a "What if ...?" agreement covering "What if my idea is turned down?" How are people expected to react? Is there an appeal process? Can they refine the idea and resubmit it? By anticipating "What if...?" situations before they happen, you can reach understanding that will help ease you out of confrontations.47.Instead of directly saying no to your boss, you should find out __________.48.The author's second warning is that we should avoid running a greater risk by__________.49.One way of responding to your boss's suggestion is to explain the __________to her and offer an alternative solution.50.To ensure fairness to reporters, it is important to set up a system for stories to__________.51.People who learn to anticipate "What if...?" situations will be able to reach understanding and avoid __________.Section BDirections:There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are fourchoices marked A)B)C) and D).Passage One:Questions 52 to 56 are basedon the following passage.At the heart of the debate over illegal immigration lies one key question: are immigrants good or bad for the economy? The American public overwhelmingly thinks they're bad. Yet the consensus among most economists is that immigration, both legal and illegal, provides a small net boost to the economy. Immigrants provide cheap labor, lower the prices of everything from farm produce to new homes, and leave consumers with a little more money in their pockets. So why is there such a discrepancy between the perception of immigrants' impact on the economy and the reality?There are a number of familiar theories. Some argue that people are anxious▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓and feel threatened by an inflow of new workers. Others highlight the strain that undocumented immigrants place on public services, like schools, hospitals, and jails. Still others emphasize the role of race, arguing that foreigners add to the nation's fears and insecurities. There's some truth to all these explanations, but they aren't quite sufficient.To get a better understanding of what's going on, consider the way immigration's impact is felt. Though its overall effect may be positive, its costs and benefits are distributed unevenly. David Card, an economist at UC Berkeley, notes that the ones who profit most directly from immigrants' low-cost labor are businesses and employers –meatpacking plants in Nebraska, for instance, or agricultural businesses in California. Granted, these producers' savings probably translate into lower prices at the grocery store, but how many consumers make that mental connection at the checkout counter? As for the drawbacks of illegal immigration, these, too, are concentrated. Native low-skilled workers suffer most from the competition of foreign labor. According to a study by George Borjas, a Harvard economist, immigration reduced the wages of American high-school dropouts by 9% between 1980-2000.Among high-skilled, better-educated employees, however, opposition was strongest in states with both high numbers of immigrants and relatively generous social services. What worried them most, in other words, was the fiscal (财政的) burden of immigration. That conclusion was reinforced by another finding: that their opposition appeared to soften when that fiscal burden decreased, as occurred with welfare reform in the 1990s, which curbed immigrants' access to certain benefits.The irony is that for all the overexcited debate, the net effect of immigration is minimal. Even for those most acutely affected –say, low-skilled workers, or California residents – the impact isn't all that dramatic. "The unpleasant voices have tended to dominate our perceptions," says Daniel Tichenor, a political science professor at the University of Oregon. "But when all those factors are put together and the economists calculate the numbers, it ends up being a net positive, but a small one." Too bad most people don't realize it.52. What can we learn from the first paragraph?A)Whether immigrants are good or bad for the economy has been puzzlingeconomists.B)The American economy used to thrive on immigration but now it's a differentstory.C)The consensus among economists is that immigration should not beencouraged.▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓D)The general public thinks differently from most economists on the impact ofimmigration.53. In what way does the author think ordinary Americans benefit from immigration?A)They can access all kinds of public services.B)They can get consumer goods at lower prices.C)They can mix with people of different cultures.D)They can avoid doing much of the manual labor.54. Why do native low-skilled workers suffer most from illegal immigration?A)They have greater difficulty getting welfare support.B)They are more likely to encounter interracial conflicts.C)They have a harder time getting a job with decent pay.D)They are no match for illegal immigrants in labor skills.55. What is the chief concern of native high-skilled, better-educated employeesabout the inflow of immigrants?A)It may change the existing social structure.B)It may pose a threat to their economic status.C)It may lead to social instability in the country.D)It may place a great strain on the state budget.56. What is the irony about the debate over immigration?A)Even economists can't reach a consensus about its impact.B)Those who are opposed to it turn out to benefit most from it.C)People are making too big a fuss about something of small impact.D)There is no essential difference between seemingly opposite opinions.Passage Two: Questions 57 to 61 are based on the following passage.Picture a typical MBA lecture theatre twenty years ago. In it the majority of students will have conformed to the standard model of the time: male, middle class and Western. Walk into a class today, however, and you'll get a completely different impression. For a start, you will now see plenty more women –the University of Pennsylvania's Wharton School, for example, boasts that 40% of its new enrolment is female. You will also see a wide range of ethnic groups and nationals of practically every country.It might be tempting, therefore, to think that the old barriers have been broken down and equal opportunity achieved. But, increasingly, this apparent diversity is becoming a mask for a new type of conformity. Behind the differences in sex, skin tones and mother tongues, there are common attitudes, expectations and ambitions▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓which risk creating a set of clones among the business leaders of the future.Diversity, it seems, has not helped to address fundamental weaknesses in business leadership. So what can be done to create more effective managers of the commercial world? According to Valerie Gauthier, associate dean at HEC Paris, the key lies in the process by which MBA programmes recruit their students. At the moment candidates are selected on a fairly narrow set of criteria such as prior academic and career performance, and analytical and problem solving abilities. This is then coupled to a school's picture of what a diverse class should look like, with the result that passport, ethnic origin and sex can all become influencing factors. But schools rarely dig down to find out what really makes an applicant succeed, to create a class which also contains diversity of attitude and approach – arguably the only diversity that, in a business context, really matters.Professor Gauthier believes schools should not just be selecting candidates from traditional sectors such as banking, consultancy and industry. They should also be seeking individuals who have backgrounds in areas such as political science, the creative arts, history or philosophy, which will allow them to put business decisions into a wider context.Indeed, there does seem to be a demand for the more rounded leaders such diversity might create. A study by Mannaz, a leadership development company, suggests that, while the bully-boy chief executive of old may not have been eradicated completely, there is a definite shift in emphasis towards less tough styles of management –at least in America and Europe. Perhaps most significant, according to Mannaz, is the increasing interest large companies have in more collaborative management models, such as those prevalent in Scandinavia, which seek to integrate the hard and soft aspects of leadership and encourage delegated responsibility and accountability.57. What characterises the business school student population of today?A)Greater diversity. C) Exceptional diligence.B)Intellectual maturity D) Higher ambition.58. What is the author's concern about current business school education?A)It will arouse students' unrealistic expectations.B)It will produce business leaders of a uniform style.C)It focuses on theory rather than on practical skills.D)It stresses competition rather than cooperation.59. What aspect of diversity does Valerie Gauthier think is most important?A)Age and educational background.C) Attitude and approach tobusiness.▃▄▅▆▇██■▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生▃▄▅▆▇██■▓。
江苏省南通市如皋市2023-2024学年高二上学期12月月考英语试题学校:___________姓名:___________班级:___________考号:___________一、阅读理解Researching both experts’ and travelers’ opinions, we selected some good Hollywood tours.Big Bus Tours Los Angeles—TMZ Celebrity TourPrice: $59 for adults and $49 for kids aged 3 to 12. Children younger than 2 are not permitted.Duration: 2 hoursTMZ operates this bus tour to take travelers through Hollywood in the hope of seeing their favorite celebrities. During the two-hour trip, TMZ guides will take you to celebrity hangouts in West Hollywood, Beverly Hills, the Sunset Strip and more. The guides even bring video cameras in case a passing celebrity is willing to give an interview.The Real Los Angeles Tours—The Real Hollywood TourPrice: $40 for adults; children 12 and younger for free.Duration: 2 hoursDuring this historic walking tour, travelers will learn why Hollywood—once a farming town—was selected by movie industry pioneers in the early 20th century. The two-hour tour also stops at unique sights, such as the oldest house in Hollywood. But major attractions aren’t forgotten either. You can expect to see the Capitol Records Building, the Dolby Theatre and the Hollywood Walk of Fame, among other sights.Bikes and Hikes LA—Hollywood Sign HikePrice: $34 per person.Duration: 2.5 hoursFor a unique and sunshine-filled Hollywood tour, choose this 2.5-hour hike to the Hollywood sign. Highlights include a view of the Griffith Observatory, panoramic views from Mount Hollywood and local guides who also double as actors and comedians. Along the 4-mile round-trip hike, you might even see local celebrities walking their dogs. Bikes and Hikes LA recommends wearing sunscreen, sunglasses and sneakers, and bringing a smartphone for all those Instagram-worthy views.Hollywood City Tours—The Original Hollywood TourPrice: Approximately $45 for adults; $35 for kids 11 and younger.Duration: 2 hoursAccording to travelers, this tour is worthwhile if you’re only in Los Angeles for a short amount of time, as you cover a lot of ground in just two hours. You’ll cruise (慢速行驶) along Rodeo Drive and the Sunset Strip in an open-top bus as your driver (who doubles as your guide) shares interesting tidbits (趣闻) and historical information.1.Which is the cheapest tour for a couple with a kid aged 5?A.Bikes and Hikes LA—Hollywood Sign Hike.B.Big Bus Tours Los Angeles—TMZ Celebrity Tour.C.Hollywood City Tours—The Original Hollywood Tour.D.The Real Los Angeles Tours—The Real Hollywood Tour.2.Which of the following does Bikes and Hikes LA suggest taking?A.A bike.B.A dog.C.A smartphone.D.A telescope. 3.What can travelers do during an open-top bus tour?A.Come across some celebrities.B.Hear some historical stories.C.See the Capitol Records Building.D.Have a view of Mount Hollywood.When school started on that warm August day, I threw myself into everything I did, including playing volleyball. I wanted to become beautiful, or at the very least, skinny. I stopped eating completely. Soon I began losing weight, which thrilled me, and I even grew to love the tiredness and light headaches that came with my poor diet, for those feelings meant that I was winning.As the season progressed, things had become tense between my head volleyball coach, Coach Smith, and me. She felt that something was wrong with my health. She talked with me about my eating and was angry that I wouldn’t listen to her when she tried to make me eat. She tried to persuade me in a determined way and so we fought constantly. Then my hunger started to affect my performance. I was so tired that practice and games were becoming a struggle. One afternoon, with hurt in her eyes, Coach Smith asked me what I had eaten and I told her nothing yet, but I was going to. She looked at me, disappointment in her eyes, knowing she couldn’t make me stop, and walked away.A couple of weeks later I attended a formal dinner for our volleyball team. I stood thereas my coach managed to say something nice about me. I realized then that I had ruined my senior year by being disrespectful, and I had probably ruined hers as well. So that evening I wrote her a letter apologizing and thanking her.Then one Saturday, as I was reading in the library, I felt someone gently take my arm and say softly, “Lynn Jones, how are you doing?” I looked up and saw the familiar face. “Thanks for the letter,” she said. “It meant a lot.”When I think of a coach, I think of someone above me, someone who gives instruction—not a friend. But Coach Smith is different, and, like any other good friend, she dealt with my problem in a determined way even when I hated her for it at that time. I didn’t deserve her kindness, but she gave it anyway. I will forever be grateful for her help, and now for her friendship.4.The author fought with Coach Smith because ________.A.she refused to go on a diet B.she caused failure of her teamC.she changed the training course D.she kept her idea of losing weight 5.Why did the author write a letter to Coach Smith?A.She felt sorry for eating too little food.B.She desired to improve her performanceC.She was grateful for Smith’s care for her health.D.She wanted to build a close relationship with Smith6.Which of the following can best describe Smith?A.Ambitious and patient.B.Caring and devoted.C.Enthusiastic and generous.D.Courageous and calm.7.What is the best title for the passage?A.Unexpected Friendship B.A Fight with My CoachC.A Strict Volleyball Coach D.My Way of Losing WeightIn August, Jason M. Allen’s piece “Theatre D’opéra Spatial” — which he created with AI image generator Midjourney — won first place in the emerging artist division’s “digital arts photography” category at the Colorado State Fair Fine Arts Competition. The definition for the category states that digital art refers to works that use “digital technology as part of the creative process”.Allen’s award-winning image has led to debates about what, exactly, it means to be anartist and whether AI can truly make art. “It felt bad for the exact same reason we don’t let robots participate in the Olympics,” one Twitter user wrote. “Exciting times ahead for the world of art and innovation!” another tweeted.Yet while Allen didn’t use a paintbrush, there was plenty of work involved, he said. First, he played around with phrasing that led Midjourney to generate images of women in elegant dresses and space helmets, in an attempt to mix Victorian-style costuming with space themes. Over time, with many slight changes to his written instructions, he created 900 different versions of what led to his final image. Then he improved the picture’s quality through Gigapixel AI and finally had the images printed.Allen is glad the debate over whether AI can be used to make art is attracting so much attention. “Rather than hating on the technology, we need to recognize that it’s a powerful tool and use it for good so we can all move forward.” Allen said.Cal Duran, one of the judges for the competition, said that while Allen’s piece included a mention of Al, he didn’t realize that when judging it. Still, he sticks to his decision to award it first place. “I think the AI technology may give more opportunities to people who may not find themselves artists in the conventional way,” he said.8.Why has Jason’s work led to debates?A.It was a copy of a photograph.B.It was created with the help of AI.C.He challenged the older artists.D.He broke the rule of the competition. 9.What can be inferred from paragraph 3?A.Allen finished part of the drawing by hand.B.Allen’s attempt achieved immediate success.C.Gigapixel AI transferred words into pictures.D.Changes of description led to different results.10.What was Cal Duran’s opinion on AI use in Art?A.It makes art more accessible to people.B.It will replace artists in the near future.C.It is widely criticized by Twitter users.D.It becomes a popular tool among artists. 11.What is the passage mainly about?A.A famous art competition.B.The trend of AI use in arts.C.The winning of an AI-driven picture.D.Start-up photographers’ innovation.Many years ago, people relied on the sun, the moon and stars to find their way around.Later, the compass was introduced. And now, we have satnav (卫星导航) systems to guide us.A satnav system uses groups of satellites to show the user’s location. They send information to a receiver, such as a smartphone, to show us where we are.The earliest built satnav system is the Global Positioning Satellite System, which belongs to the US. Then there is Russia’s Global Navigation Satellite system, the European Union’s Galileo and China’s own satellite navigation system, Beidou.On October 18, 2017, an ARJ21-700 plane, which was the first domestically (国内地) produced jet equipped with the Beidou navigation system, successfully completed a test flight. The results showed the performance of the system developed by China matches that of similar systems produced abroad, according to the Commercial Aircraft Corporation of China.Since its introduction in 2000, the Beidou navigation system has been increasing numbers of applications linked to everyday life, from shared bikes to farming.When it comes to shared bikes, smart locks that support Beidou chips offer more accurate positioning than others, making it easier to find a bike.Farmers can use Beidou-enabled tractors to plow (犁) the soil and use unmanned aircraft with Beidou to sow seeds, which can improve efficiency and make better use of resources. Beidou’s farming applications have spread from Heilongjiang Province to Beijing, Liaoning, Shanxi, Hubei and other regions across China.With its many uses, the Beidou navigation system is even playing a big role in the Belt and Road Initiative. “To date, the Beidou system has covered most parts of the Asia-Pacific region, as well as countries along the Silk Road Economic Belt and the 21st Century Maritime Silk Road,” said Yang Changfeng, chief designer of the Beidou system.Today, there are more than 20 Beidou satellites above our heads, and China plans to launch even more this year to expand the Beidou network to better serve the Belt and Road Initiative.“As Beidou expands its overseas reach, it will be increasingly popular in the logistics (物流) industry,” said Miao Qianjun, Secretary General of the navigation services association. “Ships, for example, can use it to position themselves while sailing across oceans to European countries, no longer limited to Southeast Asian regions in the near future.”12.What is the purpose of the first two paragraphs?A.To compare some modern satnav systems.B.To describe the benefits of satnav systems.C.To tell us how satnav systems were created.D.To introduce some satnav systems and their functions.13.What can we know about the Beidou navigation system according to the article?A.It was used successfully in a new jet plane.B.It is more powerful than other satnav systems.C.It was introduced to China on October, 2017.D.It wasn’t used in our everyday life until recently.14.According to the article, the Beidou navigation system is already widely used for_______.A.plowing the soil and sowing seedsB.improving the efficiency of networkC.producing more smart locks for shared bikesD.navigating ships across oceans to European countries15.What is Miao Qianjun’s attitude toward the future of the Beidou system?A.Worried.B.Casual.C.Positive.D.Indifferent.二、七选五Minimalism(极简主义), born out of a 20th-Century art movement, now refers to a lifestyle that helps people to get rid of life’s excess(过度,超量) in favor of focusing onthe top reasons people are choosing to live a minimalist lifestyle.Minimalism gives people more meaningOne of the main reasons people choose to become minimalists is that they want to achieve more meaning in their life. 17 Through practicing minimalism, people reduce their possessions to ones that make them truly happy and make more time for the experiences they really value.The lifestyle has helped people to be inspired to pursue their passions and craft their life in a way that brings them the most joy.Minimalism gives people more space18 A minimalist design is usually black and white colored rooms with smallerframed furniture. People enjoy the cleanness of the look as well as the fact that it allows for more space in the house.There’s a sense of peace and relaxation with not having space that’s cluttered(杂乱的) and messy. 19Minimalism gives people more offline timeA spin-off(派生物) that’s risen out of the movement is digital minimalism. This concept is probably particularly appealing to millennials who’ve grown tired of social media and being addicted to their technology. 20 They’re choosing to limit their cell phone use and focus on more productive and meaningful pursuits.It’s the popularity of this concept that’s helped to draw others to living more minimalist.Would you like to build a minimalist lifestyle? And what is your reason for it?A.Minimalists have enjoyed clearing up their spaces.B.It has become something of a trend all over the world.C.Minimalism is popular with many people because of its simple design.D.They feel they’ve lost sight of the things that are most important to them.E.They are choosing to abandon video games in favor of the minimalism style.F.Minimalism has helped people to really appreciate their home and be more organized.G.They are choosing to quit social media to spend time in person with family and friends.三、完形填空it sit in the middle of my back. One day, on the school bus, my older brother told me I waspraises — everyone except me. It’s not that people look at you say, “My god, you’re 30 ugly. Tell me, how do you not kill yourself?” It’s how you can stand next to an average-looking person and the people around you will say, “Wow, your friend is pretty.”But my being unattractive hasn’t 31 me living a splendid life. I will just tell you I 32 the rules of the beautiful, and learned how to make them work for me. I made friends and dated people I shouldn’t be allowed to date. I stepped over the 33 . I surrounded myself with individuals who are more educated, prettier or smarter than me.Attractiveness is only what we 34 it to be. Live the life you want to live — even if you didn’t win the 35 lottery (彩票抽奖).21.A.hands B.legs C.shoulders D.arms 22.A.unfolded B.grabbed C.fetched D.rolled 23.A.same B.visible C.different D.both 24.A.elegant B.greedy C.dynamic D.pretty 25.A.pretending B.bothering C.threatening D.attempting 26.A.evaluated B.upset C.amazed D.occupied 27.A.noticing B.believing C.making D.changing 28.A.recognized B.ignored C.contacted D.assigned 29.A.acknowledged B.applauded C.witnessed D.imagined 30.A.gradually B.merely C.finally D.incredibly 31.A.prevented B.engaged C.pressured D.cheated 32.A.distanced B.separated C.rejected D.restricted 33.A.ray B.line C.ceiling D.shelter 34.A.oppose B.suspect C.invest D.define 35.A.massive B.delicate C.genetic D.artificial四、用单词的适当形式完成短文阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。
3.2圆的轴对称性(1)
一、精心选一选
1. 如图,的弦的长为6cm,弦的弦心距为4cm,则的半径为( )
A.4cm B.5cm C.8cm D.10cm
2.下列图形中既是轴对称图形,又是中心对称图形的是( )
A.圆 B.等腰三角形 C.平行四边形 D.直角三角形
3.如图,在中,弦与直径垂直,垂足为,则下列结论中错误的是( )
A. B. C. D.
二、耐心填一填
4.圆是轴对称图形,每一条 所在的直线都是对称轴.
5.如图,在中, 、都是弦,且,若于点,于点,则 .
6.在中,是它的外心,,点到的距离是,则的外接圆的半径等于 cm.
三、专心解一解
7.如图,在中,弦为直径,于点,,,求和.
初中学习网,资料共分享!我们负责传递知识!。
I卷 I. 听力部分 第一节听下面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,并标在试卷的相应位置。
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。
1. At what time did the football match start?A. 2:15.B. 2:30.C. 2:45. 2. How does the man contact his family now?A. Through the Internet.B. By writing letters.C. By phoning. 3. Where does the conversation most probably take place?A. At a theatre.B. At a restaurant.C. At a gas station. 4. What would the woman like to watch?A. A quiz show.B. A talk show.C. A TV play. 5. What advice will the man take?A. Going on a diet.B. Doing more exercises.C. Taking more walks. 第二节 听下面5段对话或独白。
每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,各小题将给出5秒钟的作答时间。
每段对话或独白读两遍。
听第6段材料,回答第6至7题。
12. When did they probably make the conversation?A. In the morning.B. In the afternoon.C. In the evening. 听第9段材料,回答第13至16题。
江苏省如皋中学2011-2012学年高二12月质量检测(英语)一卷I 听力部分第一节听下面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,并标在试卷的相应位置.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.1. What do the man and Sarah have in common?A。
They work in the same department. B. They are both doctors. C. They are both chemists。
2。
What does the woman suggest doing?A. Waiting for ten minutes。
B. Coming back for a later show。
C。
Giving up the idea of seeing the film。
3. Which sport does the man think is the most popular?A。
Swimming. B。
Tennis. C. Table tennis.4. What does the man say about Jane?A。
She is unlucky。
B。
She cannot be trusted。
C。
She is good at telling stories.5. What are the speakers mainly talking about?A. Air pollution。
B。
City planning. C。
The traffic。
第二节听下面5 段对话或独白.每段对话或独白后有几个小题,从题中所给的A、B、C 三个选项中选出最佳选项,并标在试卷的相应位置。
听每段对话或独白前,你将有时间阅读各个小题,每小题5 秒钟;听完后,各小题将给出5 秒钟的作答时间。
A little knowledge is a dangerous thing. 一知半解,自欺欺人。
* * * * Lesson 46 Your Future and English Lead in Talk about your future and English What jobs need English ? In the future, do you want to find a job that uses English ? Why ? computer programmers businessmen translator hotel worker journalist tour guide scientist Read and fill. Jobs Things about jobs Translator many _________ need them Diplomat _________ his or her country Business person work and ___________________________ people from other countries Computer programmer make ___________ work ; work ______________and send e-mail Hotel worker work for _________________ with English _________ use English a lot in their work Journalist understand the _______ news companies represent communicate with business Scientist world’s computers on the Internet international travel Presentation translate… into… 把…… 翻译成…… 他把这封信翻译成了中文。
如皋二模英语试题及答案一、选择题(共20分,每题2分)1. Which of the following words is NOT a verb?A. runB. jumpC. readD. book答案:D2. Fill in the blank with the correct preposition.I will call you ________ the morning.A. inB. onC. atD. for答案:A3. Choose the correct answer to complete the sentence. She is ________ her sister.A. as tall asB. so tall asC. taller thanD. less tall than答案:A4. What is the past tense of "build"?A. buildedB. builtC. buildD. building答案:B5. Select the option that best completes the dialogue.A: Do you have any plans for the weekend?B: Yes, I ________ to the beach.A. goB. am goingC. will goD. went答案:B二、完形填空(共20分,每题2分)Read the following passage and choose the best word to fill in each blank.Last summer, my family and I went on a trip to the countryside. We stayed in a small village for a week. The air was fresh, and the scenery was beautiful. We enjoyed ________ the village very much.A. visitingB. to visitC. visitedD. visits答案:A6. The local people were very friendly and ________ us with their homemade food.A. sharedB. shared withC. sharingD. sharing with答案:B7. Every day, we would ________ walks along the river.A. goB. wentC. goingD. goes答案:A8. There was a small market in the village where we could buy fresh fruits and vegetables. We ________ some apples and strawberries.A. boughtB. buyC. buysD. buying答案:A9. One evening, we had a barbecue with the villagers. It wasa wonderful experience. We ________ until late at night.A. talkedB. talksC. talkingD. talk答案:A10. At the end of our trip, we said goodbye to the villagers and ________ back to the city.A. wentB. goC. goesD. going答案:A三、阅读理解(共30分,每题3分)Read the following passage and answer the questions.Passage 1:(The passage content is omitted for brevity.)11. What is the main idea of the passage?A. The importance of educationB. The benefits of exerciseC. The impact of technologyD. The role of communication答案:C12. According to the passage, what is the best way to improve health?A. Eating more fruitsB. Doing regular exerciseC. Using technologyD. Taking more rest答案:B13. What does the author suggest about the future of technology?A. It will replace humansB. It will be more advancedC. It will be less importantD. It will cause problems答案:B四、翻译题(共20分,每题5分)Translate the following sentences into English.14. 我们非常期待这次旅行。
江苏省南通如皋市2024~2025学年高二上学期教学质量调研(一)英语试题一、听力选择题1.How will the woman’s company advertise the new products?A.On TV.B.On a website.C.On outdoor posters2.What stops the man from buying the suit?A.It is too expensive.B.It is not the right color.C.It is not very comfortable. 3.Why is the man angry?A.The birds attacked his friends.B.The birds ate his plants.C.The birds scared him.4.What are the speakers celebrating?A.A wedding.B.Their graduation.C.An opening ceremony. 5.What is the probable relationship between the speakers?A.Friends.B.Relativesrub1ooon C.Co-workers.听下面一段较长对话,回答以下小题。
6.What will Dr. Jenkins do on Wednesday?A.Train a medical team.B.Perform an operation.C.Appear on a news show.7.Where will Dr. King be on Wednesday?A.At a meeting.B.At an interview.C.At a patient’s home.听下面一段较长对话,回答以下小题。
8.Where are the speakers?A.In a car.B.In a bookstore.C.In a classroom.9.What does the man need to buy?A.A painting.B.Some books.C.Some art supplies.听下面一段较长对话,回答以下小题。
用字母表示数 --复习 知识回顾 字母表示数 代数式 ------ 列代数式 ---- 求代数式的值 ---整式 ------ 法则 分类 单项式 多项式 合并同类项法则 去括号法则 -- 整式的加减 ----- 系数 次数 同类项 ----多项式的次数 项 1.下面式子中符合书写要求的是( ) C A. ab3 B. xy2
C. D. x+3 克 2.(07宁安)有一大捆粗细均匀的钢筋,现要确定其长度,先称出这捆钢筋的总质量为m千克,再从中截取5米长的钢筋,称出它的质量为n千克,那么这捆钢筋的总长度为( )米 数字与字母、字母与字母相乘,要把乘号省略;数写在字母前若是带分数要写成假分数 大显身手 除法运算要写成分数的形式 c 5、 的项是( ),次数是( ), 的项是(
),次数是( ),是( )次( )项式。
4、 的系数是( ),次数是( ), 的系数是 ( ),次数是( ); 单项式有 多项式有
整式 3、在式子: 中,哪些是单项式,哪些是多项式?哪些是整式? y2 、1-x-5xy2 、-x y2 、-x 1-x-5xy2 y2 、1-x-5xy2 、-x y2 1-x-5xy2 2 1、-x、-5xy2 7 、 若5x2 y与 x m yn的和是单项式, m=( ) n=( ) 6、下列各组是不是同类项: (1) 4abc 与 4ab (2) -5 m2 n3 与 2n3 m2 不是 是 21 8、一个关于x、y的多项式,除常数项外,其余各项的次数都是3,这个多项式最多有 ( )项。
试写出一个这种要求的多项式( ) 5 x3+x2y+xy2+y3+1 (08广西来宾) 9. 程序计算求值 160 直接代入法 11:已知x2-2x-5=0 求6x-3x2+1的值 解:∵x2-2x=5 ∴6x-3x2+1=-3(x2-2x)+1=-15+1=-14
整体代入法 12:已知(2x-1)3=a3x3+a2x2+a1x+a0求(1)a0+a1+a2+a3(2)a0-a1+a2-a3(3)a0+a2 解:当x=1时,(2×1-1)3=a3×13+a2 ×12+a1 ×1+a0 则a0+a1+a2+a3=1 当x=-1时〔 2×(-1)-1〕3=a3×(-1)3+a2 ×(-
1)2+a1 ×(-1)+a0 则a0-a1+a2-a3=-27 (a0-a1+a2-a3)+(a0+a1+a2+a3)=2(a0+a2) 则a0+a2=-13 赋特值法
.13.代数式应用:现代营养学家用身体质量指数来判断人的身体健康情况,这个指数等于人体质量(千克)除以身高(米)的平方的商。
一个健康人的身体质量指数在20-25之间,身体质量指数低于18,属于不健康的瘦,身体质量指数高于30,属于不健康的胖。
(1)设一个人的质量为w(千克),身高为h(米),求他的身体质量指数。
(2)周老师的身高为1.63米,质量为54千克,求她的身体质量指数. 解(1)质量指数=w/h2 (2)当w=54,h=1.63时,质量指数
=w/h2=54/1.632=20.3 探索规律: 14.如图,是由边长为1的正方形按照某种 规律排列而成的: ① ② ③(1)观察图形,填写下表: (2)推测第n个图形中,正方形的个数为 __________,周长为_____________.
(用含n的代数式表示) 图 形 ① ② ③ 正方形个数 8 图形的周长 18 13 18 5n+3 28 38 10n+8 回顾与反思 规范列代数式-------整式的加减-------求代数式的值 某商场文具部的某种毛笔每支售价25元,书法练习本每本售价5元。
该商场为促销制定了如下两种优惠方式:第一种:买一支毛笔附赠一本书法练习本;第二种:按购买金额打九折付款。
八年级(5)班的小明想为本班书法兴趣小组购买这种毛笔10支,书法练习本 x(x≥10)本。
(1)用代数式分别表示两种购买方式应支付的金额. (2)若小明想为本班书法兴趣小组购买书法练习本30 本,试问小明应该选择哪一种优惠方式才更省钱? 解(1)第一种:10×25+5(x-10)=5x+200 第二种: (25×10+5x) ×90%=4.5x+225 (2)解:把X=30分别代入两个代数式: 5x+200=350 4.5x+225=360所以选择第一种优惠方式 数形结合话数轴 已知有理数a、b、c在数轴上的位置如图所示,a=b (1)求a+b与a/b的值 (2)化简a+b- a-b -c-a+2 c-b +a+c -b。