真题-2013国初标准答案评分标准及细则
2013上半年全国教师资格考试《中学综合素质》真题及解答

2013 年( 上半年 ) 全国教师资格考试《综合素质》( 初、高中 ) 真题一、单项选择题 ( 本大题共29 小题,每题 2 分,共 58 分。
在每题列出的四个备选项中只有一个是切合题目要求的,请用2B 铅笔把答题卡上对应题目的答案字母按要求涂黑。
错选、多项选择或未选均无分。
)1.实现学校教育对学生发展的主导作用,其基本条件是( ) 。
A.学校的环境创建B.教师的主导作用C.家长的踊跃配合D.学生的能动活动2.有人建议邢老师对违纪学生进行罚款,邢老师拒绝了建议,表现了邢老师( ) 。
A.乐于奉献B.因材施教C.依法执教D.清廉从教3.李老师为了博得学生的喜欢,把大批时间花在怎样与学生搞好关系上,从教师专业成长的角度来看,李老师的做法表示他侧重关注的是( ) 。
A.教课情境B.职业生计C.学生发展D.教课方案4.王老师工作勤勤奋恳,每次上课都不辞劳苦地从上课到下课,但教课成效向来不理想,这令他百思不得其解,王老师最应当反省的是( ) 。
A.教课态度B.教课方式C.教课手段D.教课组织形式5.《国家中长久教育改革和发展规划大纲(2010--2020)》提出( ),为确实解决进城务工人员儿女同等接受义务教育。
A.以输入地政府管理为主,以整日制公办中小学为主B.以生源地政府管理为主,以整日制公办中小学为辅C.以生源地政府管理为主,以整日制民办中小学为辅D.以输入地政府管理为主,以整日制民办中小学为辅6.以下现象中,可依法追查刑事责任的是( )。
12.为增强班级管理,班主任王老师常常查阅学诞辰志,入侵的学生权益是( )。
A.隐私权B.声誉权C.财富权D.受教育权13.小海家长给刘老师送贵礼,托其给小海换座位,刘老师收礼并换了座位,其做法( )。
A.表现礼尚来往的优异道德B.表现关怀学生C.利用职机谋私D.严慈相济14.以下选项中,对民族乐器箫的归类,正确的一项为哪一项( )。
A.演奏乐器B.打击乐器C.弹拨乐器D.拉弦乐器15.以下戏剧中,节选自折子戏“苏三起解”的是( ) 。
2013年公务员考核规定带答案和解析

1、按照城市的( )划分,可将城市划分为块状城市、带状城市、星状城市等类型。
A.地理位置B.地形地貌C.内部结构D.平面几何形状标准答案: D解析:考察城市的分类。
按城市平面几何形状,可以将城市划分为块状城市、带状城市、形状城市等。
2、叶片眷恋地_________,栖息在行人的身上,或是顺着头发身体_________,无所依托地静卧在褐色的砖道上,深褐、暗行、浅黄及那些许丝丝绿色,在叶脉中若隐若现地_________。
依次填入划横线部分最恰当的一项是:A.回旋滑落流淌 B.回旋飘落交织C.舞动滑落交织 D.舞动飘落流淌3、经营型房地产开发投资项目的计算期是( )。
A.自项目开始建设之日起至房地产产品全部售完之日止B.自项目开始建设之日起至房地产产品转售或经济寿命结束之日止C.自项目竣工之日起至房地产产品转售或经济寿命结束之日止D.自房地产产品出租经营之日起至租赁期结束之日止标准答案: B解析:考察经营型房地产开发投资项目的计算期。
经营型房地产开发投资项目,其计算期是从项目建设开始到项目转售或经济寿命结束所经历的时间。
4、读书时对感兴趣的东西深钻细研,无疑有助于我们更全面、系统、深入地了解这些东西。
但不感兴趣的东西,有的也可能恰恰是我们所____的。
这不仅因为兴趣本身有一定的局限性,而且因为在特定领域浸染日久,往往会_____这种兴趣,形成越不感兴趣越排斥的恶性循环,导致短板更短。
依次填入划横线部分敢恰当的一项是:A.需要泛化 B.忽视僵化C.铁缺固化 D.提倡弱化5、对国有土地上被征收房屋价值的补偿,不得低于房屋征收决定公告之日被征收房屋的( )。
A.评估价格B.类似房地产的市场价格C.账面价值D.类似房地产的成交价格房标准答案: B解析:考察被征收房屋价值的赔偿的内容。
对被征收房屋价值的赔偿,不得低于房屋征收决定公布之日被征收房屋类似房地产的市场价格。
6、叶片眷恋地_________,栖息在行人的身上,或是顺着头发身体_________,无所依托地静卧在褐色的砖道上,深褐、暗行、浅黄及那些许丝丝绿色,在叶脉中若隐若现地_________。
2013年全国大学生英语竞赛初赛真题试卷(C类)及答案

2013年全国大学生英语竞赛初赛真题试卷(C类)及答案2013 National English Contest for College Students(Level C - Preliminary)(总分:150分答题时间:120分钟)Part I Listening Comprehension (30 marks) Section A (5 marks)In this section, you will hear five short conversations. Each conversation will be read only once. At the end of each conversation, there will be a twenty-second pause. During the pause, read the question and the three choices marked A, B and C, and decide which is the best answer. Then mark the corresponding letter on the answer sheet with a single line through the center.1.Why didn’t the man go to see Macbeth last week?A.H e didn’t manage to get a ticket.B.He had to attend a conference.C.H e had a better production to watch.2.What does “Fill Me In” refer to in this conversation?A.A type of upgraded mobile phone.B.A well-selling magazine.C.A writer’s new book series.3.Why doesn’t the woman like the bag?A.S he doesn’t like the pattern.B.It’s not easy to carry.C.I t’s too big for her.4.What makes a bad CV according to the man?A.F ake information.B. Terrible writing.C. Undesirable length.5.How will Cathy continue her Spanish learning?A.S he’s going to make a friend in Spain.B.She’ll communicate with a Spanish friend in Spain.C.S he’ll practice speaking Spanish with an English friend.Section B (10 marks)In this section, you will hear two long conversation. Each conversation will be read only once. At the end of each conversation, there willbe a one-minute pause. During the pause, read the question and the three choices marked A, B and C, and decide which is the best answer. Then mark the corresponding letter on the answer sheet with a single line through the center.Conversation One6.What traffic accident are the speakers talking about?A.A kid was knocked down by a car.B.Two cars crashed into a shop.C.A car ran into a wrong place.7.Why did the accident happen according the woman?A.T here were many shops around.B.The crossing is in a wrong place.C.T here was no crossing here.8.Which of the following is the suggestion they made?A.M ore traffic lights should be installed.B.A speed camera should be mounted.C.M ore policemen should patrol that area.9.Where, as the woman mentioned, has got improved traffic?A.H er own neighborhood.B.Her big brother’s neighborhood.C.H er parents’ neighborhood.10.How was the man punished for his traffic offence?A.H e was fined 100 pounds with extra penalty points.B.He had to pay 150 pounds and got 6 penalty points.C.H e finally paid 600 pounds without any penalty points.Conversation Two11.Why is the expert opposed to the view that memory aids make your memory worse? A.T here is no evidence showing that memory aids are invalid.B.Human beings’ brain functions mainly through memory aids in an effective way.C.M emory aids encourage an organizedapproach which helps the brain function effectively.12.What is intervie w’s attitude towards the idea that visual image help the memoryA.I t is hard to believe.B.It is nothing strange.C.I t is obviously nonsense.13.Who developed the system of memory aids centuries ago?A.I nhabitants on an isolated island.B.The Ancient Greeks.C.A great psychologists.14.How does mapping out notes affect the brain?A.I t is helpful in reflecting the way people link information in the brain.B.It prevents people from arranging things logically.C.I t makes people’s brain function the opposite way.15.What tends to affect people’s ability to think clearly?A.U pbringing and innate differences.B.Worry and anxiety.C.T heir aptitudes.Section C (5 marks)In this section, you will hear five short news items. After each item, which will be read only once, there will be a pause. During the pause, read the question and the three choices marked A, B and C, and decide which is the best answer. Then mark the corresponding letter on the answer sheet with a single line through the center.16.How can social media influence the presidential election in the USA according to the latest research?A.I t can help voters to choose their president.B.It can help to ensure the fairness of the elections.C.I t can help to increase the number of voters.17.What honorary title has Yaya Toure been granted?A.T he African Player of the Year.B.212 Star of the Confederation of African Football.C.T he Ivory Coast star.18.Why did Reshma Saujani set up the organization “Girls Who Code”?A.T o raise women’s status in the field of science.B.To improve girls’ aptitude and performance in STEM.C.T o arouse girls’ interest in science and technology.19.Which tablet computer’s hardware inside is more powerful?A.T he CNET Kum.B. The Google Nexus 7.C. The Apple iPad mini.20.What does the company announce that it can do for the United States?A.I t can reduce the amount of plastic waste.B.It can help to recycle the plastic waste.C.I t can increase the amount of exports. Section D (10 marks)In this section, you will hear a short passage. There are 10 missing words or phrases. Fill in the blanks with the exact words or phrases you hear. The passage will be read twice. Remember to write the answers on the answer sheet.If you (21) ____ smooth skin that glows with youth, the chances are that at some point you will have heard the exhortation to drink lots of water in order to (22) ____ those evil toxins and keep your skin healthy.The exact amount people suggest varies. US –based advice (23) ____ eight glasses a day, while in hotter climates people are advised to drink to more to (24) ____ higher rates of sweating. But regardless of the exact volume of water suggested, the principle behind the advice remains the same --- taking extra water on board will keep your skin hydrated. In other words, water acts like a moisturizer, but from the inside out.This is such a common idea you might besurprised at the (25) ____ to back up. You might expect there to be countless studies where people are (26) ____ two groups, one assigned to sip water all day, the other to drink a normal amount. Then the smoothness of the skin could be (27) ____ a month or so later to establish whether sipping more lead to smoother skin.In fact such studies are rare, partly because water can’t be patented, so it is hard to find anyone to fund such research when there will be no new (28) ____ or cosmetic to sell that could repay the costs. A review by the dermatologist Ronni Wolf at the Kaplan Medical Center in Israel found just one study looking at the effect of long-term water intake on the skin. But the results were (29) ____. After four weeks, the group who drank mineral water showed a decrease in skin density, which some believe suggests the skin is retaining more moisture, while those who drank tap water showed an increase in skin density. But regardless of the type of water they drank, it made no differenceto their (30) ____ or to the smoothness of their skin.Part II Vocabulary and Structure (15 marks) There are 15 incomplete sentences in this section. For each blank there are four choices marked A, B, C and D. Choose the one that best completes the sentence. Then mark the corresponding letter on the answer sheet with a single line through the center.31. The new star said to the journalists that she ____ the opportunity to show that she could play a serious film role.A. greetedB. rejoicedC. welcomedD. cheered32. We haven’t really ____ a solution to the problem yet, which makes the boss really frustrated.A. built upB. fallen back onC. brought overD. come up with33. Personally, I am ____ banning cigarettesmoking completely, especially in public areas.A. in touch withB. apart fromC. in favor ofD. regardless of34. Until a firm agreement has been reached, I am not ____ to accepting the offer.A. accustomedB. dedicatedC. committedD. entitled35. The government is making every effort to ____ an economic crisis, but it seems nothing could help.A. eliminateB. avertC. impedeD. swerve36. ____ a serious crime, what exactly should you do?A. Unless you witnessB. If you were to witnessC. If only you witnessD. since you witness37. During examinations candidates are always supposed to stay in seats, keep their eyes on the work, ____ to anyone.A. and not speakB. but could not speakC. rather than speakD. instead of speaking38. Realizing that he hadn’t got enough moneyand ____ to borrow any from his parents, he decided to sell his house.A. wanted notB. not to wantC. wanting notD. not wanting39. There’s no point waiting here any longer. We ____ go and have something to eat.A. can hardlyB. are bound toC. might as wellD. will have to40. While many people may refer toup-to-minute news, it is unlikely that television and the Internet ____ the newspapers completely.A. will replaceB. replaceC. are replacingD. have replaced41. She married a very nice young architect from Belfast, ____ she met on a bus during her journey to Northern Ireland.A. whoB. whenC. whichD. where42. It is a kind of illness that can result in total blindness if ____A. to leave untreatedB. is left untreatedC. leaving untreatedD. left untreated43. ----I’m so disappointed with my son! He just wouldn’t practice the piano!----Take it easy. You can lead ____ to water, but you can’t make it drink.A.a duckB. a horseC. a cowD. a dog44. ----Good morning, Madam! I’d like some information about the course.----Certainly. ____A.I’m afraid I don’t know more than you either.B.Is there anything I can do for you?C.W hat exactly would you like to know?D.H ow much information did you know?45. ---- How do you feel about countries that don’t try to reduce global warming?---- ____, those countries care more about money than saving the planet.A.A s far as I’m concernedB. It’s none of our businessC. We’re not to blameD. Things are under controlPart III Cloze (10 marks)Read the following passage and fill in each blank with one word. Choose the correct word in one of the following three ways: according to the context, by using the correct form of the given word, or by using the given letters of the word. Remember to write the answers on the answer sheet.According to recent surveys, 72% of all Americans believe that the United States government is (46) hi____ information about UFOs. Almost 68% of people think that the government has secret knowledge of extraterrestrial life. It is not (47) ____ (surprise) that the government has come under more and more (48) pr____ to declassify its UFO records and make them public. A variety of different groups have been involved in these efforts.One group to become involved is called CFI, the Coalition for Freedom of Information, John Podesta, who was White House Chief of Staffduring Bill Clinton’s (49) ____(president), is one of the many high-powered people active in this group. CFI’s aim is not to prove the (50)____(exist) of extraterrestrial life, but to make it easier for scientists in general to study unexplained aerial phenomena. Podesta and his group has asked the Pentagon to declassify its UFO records and therefore provide scientists (51) ____ data that will help in the study of UFOs. CFI has requested the release of information on several UFO cases, starting with the Kecksburg, Pennsylvania, incident. This incident took (52) ____ in 1965 when a large acorn-shaped object, the size of a small car, crashed in Pennsylvania. Some analysts say it could have been the spacecraft Kosmos 96 that had been launched towards Venus by the Soviet Union, but failed to escape Earth’s (53) g____. Others say the object did not look anything like spacecraft built on Earth in 1965.(54) Add____, the people of Kecksburg want to know what happened. On that (55) af____,hundreds of eyewitnesses watched a fiery streak of light descend from the sky towards Earth. Officials explained that nothing was found or recovered and that maybe the fireball in the sky was a meteor. But many witnesses say they saw a number of military personnel from the Army and the Air Force search the woods, and later that evening, saw a large military tractor-trailer coming from the area carrying a large object under a tarp.Part IV Reading Comprehension (40 marks) Read the following passage. Each passage is followed by several questions. Respond to the questions using information from the passage. Remember to write the answers on the answer sheet.Section A (10 marks)Questions 56-60 are based on the following passage.The average automatic teller machine (ATM) is not very smart. It will give money to anyone who has the right card and punches four or five keys in the right order. Some analysts estimate that as many as 30% of ATM transaction worldwide are cases of theft. To increase security at cash machines, some banks have tried to make their ATMs a little smarter. A small camera on the machine looks directly into the eye of every customer. It scans one iris and compares the tiny patterns of ridges, dots, and other features to a code in its computer. If there is a match, the ATM will start counting out cash. If not, a message is automatically sent to the nearest police station.Iris-scanning is one fast-growing form of biometric identification --- determining who someone is by examining features the body. One of the earliest biometric techniques was fingerprinting. The line on fingerprints are unique to each person, so not even identicaltwins have the same fingerprints. Fingerprinting has become famous as a way of finding out who committed a crime, but it very often fails. A careful criminal can swear gloves, avoid touching thing, or even alter his fingerprints by burning, cutting, or scraping them. In the search for a more reliable system, security experts have focused on the eye.Like a fingerprint, every iris is, for all practical purposes, unique. Each person’s right iris is even different from his or her left one. A low-cost digital camera, like the kind installed at ATM machines, can easily detect hundreds of different features in the iris. The chance of two irises having the same features is close to zero. Tests have shown that iris-scanners are very hard to fool. They can tell the difference between a real iris and a false one. They can see right through colored contact lenses, eyeglasses, and even mirrored sunglasses. Although many criminal are willing to burn or cut their fingers in pursuit of the perfect crime, few would bewilling or able to alter their irises.To make iris-scanning work, a computerized database has to match certain iris features with certain people. This means that each ATM customer has to allow a bank to photograph his or her iris and keep that highly personal information in a computer. Some people have worried, however, that an increased use ofiris-scanning will lead to a dangerous loss of privacy. By mounting iris-scan cameras in public places, governments could track a private citizen all day long without the person’s knowledge. This would be a great advantage to the police, but it could also give corrupt officials a new way to control their opponents. The military’s development of tiny robots suggests that government iris-scanners could even invade private homes!Questions 56-60Complete the summary with words from the passage, changing the form where necessary, withonly one word for each blank.ATM transactions are often cases of theft, where an unauthorized user takes (56) ____. To decrease insecurity, some banks have installed iris-scanning machines at ATMs. These small cameras Section B (10 marks)Questions 61-65 are based on the following passage.Seed catalogues feature hundreds of flowering species. For the persons just beginning garden this can be bewildering, and below are the details of some popular choices, nearly all of which should be sown in the spring. With the exception of busy lizzies, which need a little care, they are all very easy to grow from seed. DahliasThese are sturdy plants bearing showy flowers in a wide range of rather gaudy colors. Sow in a frame in April and plant the seedlingsout when frosts are over. Dahlias flower throughout the summer and into the autumn. When autumn frosts begin to make them look unhappy, you should dig up the tuberous roots and save them. A frost-free loft, shed or garage is the ideal place. The following spring you plant the tubers instead of sowing seed again.LupinsLupins are hardy perennials. This means that the plants will stay in your garden and carry on flowering year after year. Seed sown in April will usually give you some spikes of colors in the first summer, and year by year the plants get bigger and the flowering stems get taller and grander. Selective breeding has led to the introduction of some fine, bicolored varieties in some dazzling shades. The short-lived flowers make a real misunderstanding spectacle.Busy lizziesLike dahlias, busylizzies need to be startedoff under glass, as theycannot stand frost, and panting out is best done in May. Outdoor flowering ends in September, so beat the frosts and bring your favorite specimens indoors to give your home some sinter color! Indoors they will carry on flowering indefinitely, though you may like to plant them out again when spring returns. Like pansies (below) they do very well in sun or shade, but the soil must be moist. Most varieties growto be a height of only 20 cm or so.PotentillasPotentillas are hardy shrubs. In other words, the woody branches spring from ground level—there is no central trunk. Seed is probably best sown in autumn, in which case you should keep the plants in a sheltered spot until April offers favorable conditions for planting out. Once flowering begins in early summer the best varieties (such as Melton Fire) will stay in bloom almost ceaselessly for years on end while at the same time spreading out to provide ground cover or a low hedge.PansiesPansies have a good long flowering season year after year, and some varieties can be sown in spring to give truly splendid results the first autumn. Unlike dahlias and lupins, which can easily grow a meter tall, pansies grow no higher than 10 or 20 cm. Their soil, position and moisture requirements are just like those of busy lizzies but pansies differ in being hardy. Give them a try!Questions 61-63Decide whether the following statements are true (T) or false (F) according to the passage.61. Both dahlias and lupins, which are sown in April, need protecting from frost.62. Brought indoors in autumn, dahlias, busy lizzies and potentillas will carry on flowering almost non-stop.63. Among all the flowers busy lizzies are not very easy to grow from seed.Section C (10 marks)Questions 66-70 are based on the following passage.When looking for love, people may go to some extreme lengths. They might go on blind dates set up by family and friends. They might write personal ads to place in newspapers. Or they might use a computer to help them in their search for a soul mate by joining an online dating services. Some people have even tried to find their perfect match through game shows on television. Many of these TV dating shows, including The Bachelor and Who Wants to Marry a Millionaire? have proved to be ratings blockbusters, with millions of viewers watching each week to find out which of the contestants will find true love.Of all these game shows, perhaps the one with the most unexpected ending was Mr. Right, which was shown in England in 2002. On the show, a bachelor, thirty-five-year-old Lance Gerrard-Wright, dated fifteen women to findthe one who was his ideal partner. The host of the show was Ulrika Johnson, an English celerity originally from Sweden. For seven weeks on the show, Gerrard-Wright took turns going on dates with each of the women, taking them to expensive restaurants and exotic locations. He even met the women’s families and introduced them to his own. Then at the end of each episode, he would choose between one and three of the contestants with whom he had felt the least compatible, and say goodbye to them. At one point during the series, one contestant volunteered to leave because she said she didn’t find him attractive. After two dates she said she had had enough, and she couldn’t see it working. “He wasn’t my cup of tea.” In another episode the woman he was on a date with burst into tears when he called her by another contestant’s name. “You called me by another girl’s name. I can’t believe you did that. I really liked you,” she sobbed.But in the final episode, the woman heeventually chose decided she didn’t want to marry him after all. “I think you’ve chosen me because you have to choose someone,” she said. Maybe this was because she already knew he had fallen in love---with the show’s host!After leaving the show, Gerrard-Wright and Johnson were seen dining together and attending parties around London more and more often. Finally, on May 1, 2003,Gerrard-Wright proposed to Johnson on the steps of St. Paul’s Cathedral. And she accepted his proposal right away, although it was a conditional acceptance. Johnson has two children from previous relationships—aneight-year-old son, Cameron, and a two-year-old daughter, Bo. She had to make sure that they agreed to the marriage. Luckily, they did. Gerrard-Wright said, “In the end the show did work for me. I grabbed an opportunity to get a girlfriend and I did. Ulrika’s gorgeous.”Questions 66-68Complete the following sentences with information given in the passage in a maximum of 2 words for each blank.66. Lance Gerrard-Wright went to ____ to go on the show Mr. Right in order to find his perfect match.67. On the show, Lance had the opportunity to date many gorgeous women among whom there might be one that he was almost ____.68. Ulrika accepted Lance’s proposal ____ that her children agreed to their marriage as well. Questions 69-70Choose the best answer according to the passage.69. Which of the following did NOT happen on the show?A. Lance went on dates with several women.B. The candidates went to some very good restaurants.C. Ulrika consulted her parents before she made her decision.D. The women met Lance’s family.70. What happened after seven weeks of doingthe show?A. All of the women found their beloved.B. Lance started to date with the show’s host.C. One of the women on the show couldn’t help crying.D. Ulrika asked Lance to marry her.Section D (10 marks)Questions 71-75 are based on the following passage.Alaska is disappearing slowly but surely. Since the 1950s, it is estimated that as much as 15 percent of Alaska’s area has disappeared. But how can a whole state be disappearing?One reason for Alaska’s gradual disappearance is the melting its glaciers. According to one geologist at the US Geological Survey, about 98 percent of Alaska’s glaci ers are either unmoving or diminishing. This diminishing seems mainly due to the increase in global temperatures. Since the 1960s, the average year-round temperature has increasedby 5℉. Furthermore, the average winter temperature has increased by 8℉. Presently, an estimated 24 cubic miles of ice is disappearing from Alaskan glaciers every year. It may be even more in the near future, as some scientists predict that the average world temperature could go up 2.5 to 10℉by the year 2010. Another problem contri buting to Alaska’s gradual disappearance is its permafrost. (74) Much of the land in Alaska was permanently frozen, or frozen for most of the year, thus maintaining its integrity. Now, the thawing permafrost is causing a number of problems on land. Roads and utility poles are collapsing. Also, the hard permafrost which originally prevented beaches from eroding during violent storms is now melting. Affected villages are forced to relocate. For villages on small low islands, one terrible storm could wipe out the entire community.The melting permafrost and increasing temperature are also having a negative impacton the forests of Alaska. As the permafrost under the forests melts, insects that normally don’t turn up until the warmer seasons are appearing sooner. The spruce-bark beetle, for example, is increasing in numbers as a result of global warming. It usually takes about two years for these beetles to grow and reproduce in a very cold weather. However, due to the increase in temperatures, spruce-bark beetles are damaging as many trees in one year as they previously damaged in two. At this rate, Alaska’s forest won’t survive the turn of the century.Some scientists believe that human activity is linked to a global increase in weather temperature. Whether the rising temperature are caused by human activity or natural changes, the fact remains that Alaska is warming. Some others argue that global warming may be a normal trend on the Earth’s temperature chart.(75) One theory argues that we are near the end of a so-called “Little Ice Age”, and the return of the glaciers is natural result of this cycle.Whether natural or produced by humans, there is little hope for the immediate future of glaciers as we know them. Horribly, this could be a preview of what will happen to the rest of the world in the next century.Questions 71-73Answer the following questions briefly according to the passage.71. What are disappearing in Alaska actually?72. How much ice is melting each year according to the survey?73. Why do insects damage more trees than before?Questions 74-75Translate the underlined sentences in the passage into Chinese.74. Much of the land in Alaska was permanently frozen, or frozen for most of the year, thus maintaining its integrity75. One theory argues that we are near the end of a so-called “Little Ice Age”, and the return ofthe glaciers is natural result of this cycle. Whether natural or produced by humans, there is little hope for the immediate future of glaciers as we know them.Part V Translation (10 marks)Translate the following sentences into English, using the hints given in brackets. Remember to write the answers on the answer sheet.76. 宴会时间就要到了,但她仍纠结于是否应该去。
2013 年全国中学生英语能力竞赛(NEPCS)初赛初二年级组试题参考答案及评分标准

2013年全国中学生英语能力竞赛(NEPCS)初赛初二年级组试题参考答案及评分标准听力部分(共四大题,计3分)I.Sentences(句子理解)(共5小题;每小题1分,计5分)1—5DCABDII.Responses(问句应答)(共5小题;每小题1分,计5分)6—10ACDBADialogues(对话理解)(共10小题;每小题1分,计10分)11—15CBDAC16—20BDACBIV.Passages(短文理解)(共10小题;每小题1分,计10分)21—25ADBCC26.radio27.funny28.grow up29.something/things/eful for/helpful to/ helping笔试部分(共九大题,计120分)I.Multiple-choice(选择填空)(共15小题;每小题1分,计15分)31—35ADCDB36—40CBAAC41—45BDACDCloze(完形填空)(共15小题;每小题1分,计15分)A)46.tired47.classrooms/classroom48.Because49.enough50.experience51.remember 52.failed53.less54.something/anything55.finishB)ter59.back60.happy/glad/pleasedIII.Reading Comprehension(阅读理解)(共20小题;61—70题,每小题1分,71—80题,每小题2分,计分)A)61—63CBD64—65FTB)66—70ECBDAC)71.the teddy beara newspaper cartoonbutton eyesPresident RooseveltmoneyD)76.About23hours.Yes,he does.Cartoons and comedies.At the weekend.Football matches when England′s playing!IV.Sentence Pattern Transformation(句式转换)(共5小题;每小题2分,计10分)81favourite food82were you83better not84How do85were waitingV.Translation(翻译)(共5小题;每小题2分,计10分)86事实胜于雄辩。
2013年成都市中考数学答案及评分标准

三、 解答题 ( 本大题共6 个小题,共5 4 分 ) 15 . ( 本小题满分1 2 分,每题6 分 ) ( 1) 解:原式= 4 3 2 = 4. ( 2) 解:由①+②,得
3 2 3 2
· · · · · · 4 分 · · · · · · 6 分
3x 6 ,
∴ x 2. · · · · · · 3 分
四 边形 ABCD
2
= S△ABD + S△CBD
1 1 BD AH BD CH 2 2 1 BD AC 2
175 3 2
900
· · · · · · 10 分
28 . ( 本小题满分1 2 分 ) 解: ( 1) 由题意,得点 B 的坐标为 (4, - 1) . ∵抛物线过点 A( 0 , - 1) , B (4 , - 1) 两点,
数学答案
第4 页(共8 页)
当 3 t 7 时, s 2 3
1 2 (2t 4) ( t 3) 2
· · · · · · 6 分
t 2 4t 9.
∴总路程为: 7 4 7 9 30 ,且 30
2
7 21 6. 10
令 s 21 ,得 t 4t 9 21 .解得 t1
成都市二〇一三年高中阶段教育学校统一招生考试试卷
( 含成都市初三毕业会考 )
数学参考答案及评分意见
说明: (一 ) 考生的解法与 ‘ ‘ 参考答案 ’ ’ 不同时,可参照 ‘ ‘ 答案的评分标准 ’ ’ 的精神进行评分 (二 ) 如解答的某一步计算出现错误,这一错误没有改变后续部分的考查目的,可酌情给分, 但原则上不超过后面应得分数的二分之一;如属严重的概念性错误,就不给分. (三 ) 以下解答各行右端所注分数表示正确做完该步骤应得的分数. (四 ) 评分的最小单位是1分,得分或扣分都不能出现小数.
2013年临沂数学参考答案及评分标准

选项AB C D12 562013年临沂市初中学生学业考试试题数学参考答案及评分标准说明:第三、四、五题给出了一种或两种解法,考生若用其它解法,应参照本评分标准给分.二、填空题(每小题3分,共15分)15.(2)(2)x x x +-; 16.2x =; 17 18.15419. 3或-3 三、开动脑筋,你一定能做对!(共21分) 20.解:(1)80 ………………………………(2分) (2)80561248---=(人) ……………(3分)o o 8100%3603680⨯⨯=.所以“C ”所对圆心角的度数是o36 ………(4分) 图形补充正确 ………………………………(5分) (3)160070%1120⨯=(人).所以该社区约有1120人从不闯红灯.…………………………………(7分)21.解: (1)设购买A 型学习用品x 件,则B 型学习用品为(1000)x -. ……(1分)根据题意,得2030(1000)26000x x +-=………………(2分)EODCBA解方程,得x =400.则10001000400600x -=-=.答:购买A 型学习用品400件,购买B 型学习用品600件. ………………………(4分) (2)设最多购买B 型学习用品x 件,则购买A 型学习用品为(1000)x -件.根据题意,得20(1000)+3028000x x -≤……………………(6分) 解不等式,得800x ≤. 答:最多购买B 型学习用品800件. ……………………(7分)22.证明:(1)∵E 是AD 的中点,∴AE=ED.……………………………(1分)∵A F ∥BC,∴∠AFE=∠DBE, ∠FAE=∠BDE,∴△AFE ≌△DBE. ………………………(2分) ∴AF=DB.∵AD 是BC 边上的中点,∴DB=DC,AF=DC ……………(3分) (2)四边形ADCF 是菱形. …………………………………(4分) 理由:由(1)知,AF=DC,∵A F ∥CD, ∴四边形ADCF 是平行四边形. ……(5分) 又∵AB ⊥AC, ∴△ABC 是直角三角形∵AD 是BC 边上的中线, ∴12AD BC DC ==. …(6分) ∴平行四边形ADCF 是菱形. …………………(7分)四、认真思考,你一定能成功!(共18分)23. (1)证明:连接OD. ……(1分) ∵AB 与⊙O 相切于点 D , ∴o90ODB ∠=,∴o 90B DOB ∠+∠=.∵o 90ACB ∠=,∴o 90A B ∠+∠=,∴A DOB ∠=∠ ……(3分) ∵OC=OD, ∴2DOB DCB ∠=∠.∴2A DCB ∠=∠ ……(4分) (2)方法一:在R t △ODB 中,OD =OE,OE=BE∴ 1sin 2OD B OB ∠== ∴o o 30,B DOB ∠=∠= ……6分∵ osin60BD OB =⋅=∴11222DOB S OD DB ==⨯⨯= ………………(7分)26023603ODEOD S ππ⋅==扇形2=3D O OB DES S S π-= 阴影扇形 ………………(9分)方法二:连接DE,在R t △ODB 中,∵BE=OE=2 ∴12DE OB OE ==, ∵OD=OE, ∴△DOE 为等边三角形,即o 60DOB ∠= ……(6分) 以下解题过程同方法一.24.解:(1)设y 与x 的函数解析式为+y kx b =根据题意,得1060,2055,k b k b +=⎧⎨+=⎩解得1265k b ⎧=-⎪⎨⎪=⎩∴y 与x 之间的函数关系式为1+65(1070)2y x x =-≤≤;…(3分) (2)设该机器的生产数量为x 台, 根据题意,得1(+65)20002x x -=,解得1250,80.x x == ∵1070x ≤≤∴x=50. 答:该机器的生产数量为50台. ……………………………(6分)(3)设销售数量z 与售价a 之间的函数关系式为z ka b =+G HGH FEPC BDA FEPDCBA 根据题意,得5535,7515,k b k b +=⎧⎨+=⎩ 解得1,90.k b =-⎧⎨=⎩∴90.z a =-+ ……………………(8分)当z=25时,a=65.设该厂第一个月销售这种机器的利润为w 万元.200025(65)62550w =⨯-=(万元). …………………(9分)五、相信自己,加油呀!(共24分)25.(1…………………………(2分) (2)过点P 作P H ⊥AB,P G ⊥BC,垂足分别为H,G .…………………(3分)∵在矩形ABCD 中,o90ABC ∠=,∴P H ∥BC. 又∵o30ACB ∠=,∴o30APH PCG ∠=∠=∴o cos302PH AP AP =⋅=, o 1sin 302PG PC PC =⋅=………………(5分) 由题意可知HPE GPE α∠=∠=∠, ∴R t △PHE ∽R t △PGF.∴212AP PE PH PF PG PC === …………(7分) 又∵点P 在矩形ABCD 对角线交点上,∴AP=PC.∴PEPF= ………………(8分)(第26题图)'(3)变化 ……………………………………………………(9分)证明:过点P 作P H⊥AB,PG ⊥BC,垂足分别为H,G.根据(2),同理可证PE PF =………(10分)又∵:1:2AP PC = ∴PE PF =………………………(11分) 26. 解:(1)设抛物线的解析式为 2y ax bx c =++,根据题意,得0,2550,5.2a b c a b c c ⎧⎪-+=⎪++=⎨⎪⎪=-⎩,解得1,22,5.2a b c ⎧=⎪⎪=-⎨⎪⎪=-⎩∴抛物线的解析式为:2152.22y x x =-- ………(3分) (2)由题意知,点A 关于抛物线对称轴的对称点为点B,连接BC 交抛物线的对称轴于点P ,则P 点 即为所求. 设直线BC 的解析式为y kx b =+,由题意,得50,5.2k b b +=⎧⎪⎨=-⎪⎩解得 1,25.2k b ⎧=⎪⎪⎨⎪=-⎪⎩ ∴直线BC 的解析式为15.22y x =- …………(6分) ∵抛物线215222y x x =--的对称轴是2x =,∴当2x =时,153.222y x =-=- ∴点P 的坐标是3(2,)2-. …………(7分)(3)存在 …………………………(8分) (i)当存在的点N 在x 轴的下方时,如图所示,∵四边形ACNM 是平行四边形,∴C N ∥x 轴,∴点C 与点N 关于对称轴x=2对称,∵C 点的坐标为5(0,)2-,∴点N 的坐标为5(4,).2- ………………………(11分) (II )当存在的点'N 在x 轴上方时,如图所示,作'N H x ⊥轴于点H ,∵四边形''ACM N 是平行四边形,∴'''',AC M N N M H CAO =∠=∠,∴R t △CAO ≌R t △''N M H ,∴'N H OC =.∵点C 的坐标为'55(0,),22N H -∴=,即N 点的纵坐标为52,∴21552,222x x --=即24100x x --=解得1222x x ==∴点'N 的坐标为5(2)2和5(2)2+.综上所述,满足题目条件的点N 共有三个,分别为5(4,).2-,5(2)2+,5(2)2………………………(13分)。
第十三届全国初物理知识竞赛解答和评分标准

第十三届全国初中应用物理知识竞赛参考解答和评分标准说明:1.提供的解答除选择题外,不一定都是惟一正确的.对于那些与此解答不同的解答,正确的,同样给分。
2.评分标准只是按一种思路与方法给出的。
在阅卷过程中会出现各种不同情况,可按照本评分标准的精神定出具体处理办法,但不要与评分标准有较大偏离。
3.分析计算题是按照分步方法给分的.在评分标准中常常写出(l)式几分,(2)式几分……这里的式子是用来代表步骤的.若考生并未写出这个式子,而在文字表达或以后的解题过程中反映了这一步骤,同样给分.没有写出任何式子或文字说明,只给出最后结果的,不能给分.4.参考解答中的数字结果是按照有效数字的运算要求给出的,但对考生不做要求.不要因为有效数字的错误而扣分。
5.在最后定奖时,如果得分相同的人数超过获奖名额,从而难于选拔,可对待选试卷进加分评判.加分评判的基本依据是:(l)所用方法或原理不是课本所讲的,具有创造性,应加分;(2)方法简便,应加分;(3)提出多种正确解法,应加分;(4)试卷表达规范,条理清楚,能充分利用数学工具,应加分。
上述各项的执行都需由竞赛领导小组做出规定〈省统一分配奖励名额的由省决定,地、市分配奖励名额的由地、市决定〉.一、答案和评分标准共12分,每小题3分.1.A,2.B,3.D,4.C.二、答案和评分标准共18分.1.凸透镜,反光罩.每空2分.2.26 Ω或欧姆每空2分.3. √3/3或0.58。
4分。
4.糠皮、谷粒。
它们以同样的速度被抛出,碎石的质量最大,动能最大,所以克服空气阻力运动的距离最大,糠的质量最小,运动的距离最小。
第一空2分,第二空1分,第三空3分.三、参考解答和评分标准:共29分1.如果户内电线短路,电流将会很大,这时铁丝不能熔断,电路将会过热,可能引起火灾。
全题5分·"短路"、"电流大"、“过热"、“火灾"各1分,完整回答再1分.答用电器总功率过大,会发生危险也给分.2.〈l〉工业、民用的锅炉以及汽车等,燃烧燃料时产生热;人体本身也产生热.。
2013年普通高等学校招生全国统一考试(广东卷)文科综合试题参考答案及评分标准

绝密★启用前秘密★启用后2013年普通高等学校招生全国统一考试(广东卷)文科综合试题参考答案及评分标准一、选择题:本大题共35小题,每小题4分,共140分。
在每小题列出的四个选项中,只有一项是符合题目要求的。
36.(28分)(1)①党的领导和执政地位的必然规定。
(3分)②党的性质和宗旨的必然要求。
(3分)③中国特色社会主义的根本保障。
(3分)④实现人民民主专政和人民当家作主的根本保证。
(3分)【评分说明】其它解答若超出答案要点,且言之成理、分析得当,可酌情给分,但该问最高不超过12分。
(2)党和政府为人民服务的价值观对认识世界和改造世界的活动具有重要的导向作用。
(4分)①人民群众是社会历史的主体和创造者,是物质财富和精神财富的创造者,是社会变革的决定力量。
(3分)对根本政治问题和权力的认识,通过广汇民意、广集民智作出决策,着力解决群众的问题,体现了对人民主体地位的尊重和对人民负责的态度。
(3分)②群众路线是党的根本的领导方法和工作方法。
(3分)把群众放在首位、秉持正确权力观、问计于民、帮助再就业等,实践了群众路线,坚持了群众观点,巩固了群众基础。
(3分)【评分说明】必须准确答出原理,且结合材料分析得当,才能给相应分数。
37.(24分)(1)①2008-2012年城镇居民人均可支配收入和社会消费品零售总额均增长。
(2分)②2008-2012年城镇居民人均可支配收入增速总体上扬,社会消费品零售总额增速总体下滑。
(2分)③城镇居民人均可支配收入增速低于社会消费品零售总额增速。
(2分)【评分说明】若答出“人均可支配收入是影响社会消费品零售总额的重要因素”可给2分,但该问最高不超过6分。
(2)①促进生产的发展,拉动经济增长。
带来新的供给,推动产能扩张。
(2分)②对生产的调整和升级起导向作用,推动技术创新,促进产业结构优化升级。
(2分)③带动一个产业的出现和成长。
带动与汽车相关产业的发展。
(2分)④创造新的劳动力。
2013届上海市初三教学质量调研考试数学卷答案要点与评分标准

2013年上海市初三教学质量调研考试数学试卷答案要点与评分标准说明:1.解答只列出试题的一种或几种解法.如果考生的解法与所列解法不同,可参照解答中评分标准相应评分;2.第一、二大题若无特别说明,每题评分只有满分或零分;3.第三大题中各题右端所注分数,表示考生正确做对这一步应得分数;4.评阅试卷,要坚持每题评阅到底,不能因考生解答中出现错误而中断对本题的评阅.如果考生的解答在某一步出现错误,影响后继部分而未改变本题的内容和难度,视影响的程度决定后继部分的给分,但原则上不超过后继部分应得分数的一半; 5.评分时,给分或扣分均以1分为基本单位.一、选择题:(本大题共6题,每题4分,满分24分) 1.A ; 2.D ; 3. D ; 4. B ; 5.D ; 6.B1. 解析:(A )()632a a =;正确; (B )2222a a a =+;错误;(C )()()2623a a a =⋅;错误; (D )a a a 23=-;错误;故选A . 2. 解析:(A )是中心对称图像;(B )即是轴对称图像、又是中心对称图形; (C )是中心对称图像;(D )既不是轴对称图像、也不是中心对称图像; 故选D .3. 解析:∵点P 关于x 轴的对称点1P 的坐标是()2,3, ∴点P 的坐标是()2,3-;∴点P 关于原点的对称点2P 的坐标是()2,3-.故选D .4. 解析:数据2、1、x 、7、3、5、3、2的众数是2,说明2出现的次数最多,x 是未知数时2,3均出现两次,∴2x =.这组数据从小到大排列:1、2、2、2、3、3、5、7,处于中间位置的数是2和3,因而的中位数是: ()232 2.5+÷=. 故选B .5. 解析:∵抛物线()a x y ++-=21的对称轴是1-=x ;∴点A 关于对称轴的点A '是),0(1y ;那么点A '、B 、C 都在对称轴的右边,而对称轴右边y 随x 的增大而减小,于是321y y y >>.故选D .6. 解析:如图,首先分别在A B 的两侧找到一个使其面积是2个平方单位的点,再分别过这两点作A B 的平行线,则平行线与网格的所有交点都是满足条件的C 点,显然满足条件的C 点有5个. 故选B .二、填空题:(本大题共12题,每题4分,满分48分)7. 2=x ; 8. ()()11-+a a a ; 9. 11≤<-x ; 10. 1<x 且0≠x ; 11.72; 12. 2; 13.7900; 14.a b 3231-; 15. 12;16. 671; 17. 2505m <≤; 18.()1514+n n 或()156+n n ;7. 解析:xx 211=-两边同时乘以()1-x x 得:()12-=x x ,解得2=x .故答案为2=x .8. 解析:()()()11123-+=-=-a a a a a a a . 故答案为()()11-+a a a .9. 解析:由01>+x 解得1->x ;142-≥+x x 解得1≤x , 则不等式组的解集为11≤<-x . 故答案为11≤<-x .10. 解析:⎪⎩⎪⎨⎧≠≠-≥-00101x x x ,解得1<x 且0≠x .故答案为1<x 且0≠x .11. 解析:在英语句子“Wish you success!”中共14个字母,其中有字母“s ”4个;∴所求概率72144==.故答案为72.12. 解析:由题意知:平均数85971068=++++=x ;方差()()()()()[]2898781086885122222=-+-+-+-+-=S ;∴标准差是方差的算数平方根2.ABC 4 C 5C 2C 1C 3故答案为2.13. 解析:正七边形的每一个外角度数为:︒⎪⎭⎫⎝⎛=÷︒73607360,则内角度数是:︒⎪⎭⎫⎝⎛=︒⎪⎭⎫ ⎝⎛-︒79007360180.故答案为7900.14. 解析:设B D 是A B C ∆的中线; ∵b AC =,∴b AD 21=;∵a AB =,∴a b AB AD BD -=-=21;∵点G 是ABC ∆的重心,∴a b a b BD BG 3231213232-=⎪⎭⎫ ⎝⎛-⋅==. 故答案为a b 3231-.15. 解析:设()16812753=+++++=n S ①, 则()16835712=+++++= n S ②; ①+②得,()16823122⨯=++=n n S ;整理得:016822=-+n n ,解得14,1221-==n n (舍去).故答案为12.16. 解析:设A E a =,B E b =,八个三角形全等,则()21S a b =+,∵22EF a b =+,∴222S a b =+;∵M N b a =-,∴()23S b a =-;∵1232013S S S ++=,∴()()22222013a b a b b a ++++-=;即()2232013a b +=,∴22220136713S a b =+==.故答案为671.17. 解析:当O C 与半径为2的A 相切时,B O C ∠最小;此时易证B O C O A C ∠=∠,在R t A C O ∆中,3O A =,2A C =,则22325OC =-=;∴25cot cot 5BO C O AC ∠=∠=;随着C 的移动,B O C ∠可以越来越大,则cot B O C ∠的值越来越小,无限接近于0; ∴250cot 5BO C <∠≤.故答案为2505m <≤.18. 解析:设反比例函数解析式为xk y =,按题意本题分两种情况讨论:(I )若反比例函数与B C ,A B 平移后的对应边相交,与A B 平移后的对应边相交的交点的坐标为(2,1.4),则24.1k =,解得514=k ,反比例函数解析式为xy 514=;则第n 次()1>n 平移得到的矩形的边与该反比例函数图象的两个交点的纵坐标之差的绝对值为()()151********+=+-n n n n;(II )若反比例函数与O C ,A B 平移后的对应边相交,则6.02=-k k ,解得56=k ,反比例函数解析式为xy 56=;则第n 次()1>n 平移得到的矩形的边与该反比例函数图象的两个交点的纵坐标之差的绝对值为()()15615656+=+-n n n n.故答案为()1514+n n 或()156+n n .三、解答题:(本大题共7题,满分78分) 19. 解:原式=()11112-⨯--⨯a aa ……………………………………………………(5分)()()aa a a --+-=111121+=++=a a a .……………………………………………………………(5分)20. 解:()()0424312422≥-=-⨯⨯--=∆m m ,解得61≥m ;…………………(3分)∵231,12121m x x x x -=⋅=+;…………………………………………………(2分)∴()0223122121>+-=++⋅m x x x x ,解得35<m ;………………………(3分)∴m 的取值范围是3561<≤m .…………………………………………………(2分)21. 解:(1)证明:连结O M ,则O M O B =;(1分)∴12∠=∠;∵BM 平分A B C ∠,∴13∠=∠; ∴23∠=∠;∴O M ∥B C ;…………………(1分) ∴A M O A E B ∠=∠;在A B C ∆中,A B A C =,A E 是角平分线, ∴AE BC ⊥;∴90A E B ∠=︒,∴90A M O ∠=︒; ∴O M A E ⊥;…………………(1分)∴A E 与O 相切;……………(1分)(2)在A B C ∆中,A B A C =,A E 是角平分线, ∴12B E BC =, A B C C ∠=∠;∵4B C =,1cos 3C =,∴2B E =,1cos 3A B C ∠=;在ABE ∆中,90AEB ∆=︒,6cos B E A B A B C==∠;………………………(2分)设O 的半径为r ,则6A O r =-;∵O M ∥B C ,∴A O M ∆∽ABE ∆;………………………………………(1分) ∴O M A O B EA B =,626r r -=,…………………………………………………(2分)解得:32r =; …………………………………………………………………(1分)ABCMOE G123 F∴O 的半径为23.22. 解:如图,过点A '作AB N A ⊥'垂足为N 点;……………………………………(1分) 在CD H Rt '∆中,若H HD '∠不小于︒60, 则2360sin =︒≥''DH C H ;即3423='≥'D H C H ;……………………(3分)∴34≥'='C H M B ;………………………(1分) ∵NP A Rt '∆∽MP B Rt '∆; ∴PB P A MB N A ''='';………………………………(2分)∴cm PB M B P A N A 5.33212346≈=⨯≥''⋅'=';……………………………(2分) ∴踏板AB 离地面的高度至少等于3.5cm .……………………………………(1分)【注:结果写成3.46cm 扣1分】23. 解:(1)11y x =-;1x y x =-;……………………………………………………(2分)(2)上;1;………………………………………………………………………(2分)12111222x x y x x x --+===+---,它的图象可由反比例函数1y x=的图象先向右平移2个单位,再向上平移1个单位得到;…………………………………(2分)(3)当0ab ≠,且a b ≠时,1x b x a b ab a y x ax ax a+++--===++++;………(2分)(I )当0a >时,x b y x a+=+的图象可由反比例函数b a y x-=的图象先向左平移a个单位,再向上平移1个单位得到;…………………………………………(2分) (II )当0a <时,x b y x a+=+的图象可由反比例函数b a y x-=的图象先向右平移a -个单位,再向上平移1个单位得到;………………………………………(2分)A PBDHH ′ B ′A ′MCN24. 解:(1)∵45B A E B A D ∠=∠+︒,45C D A BAD ∠=∠+︒;∴B A E C D A ∠=∠; 又∵45B C ∠=∠=︒;∴ABE ∆∽D C A ∆;……………………………………………………………(1分)∴B E B AC AC D=;由已知2CA BA ==,∴22y x =;………………………………………(1分)∴y 与x 之间的函数关系式为2y x=,函数定义域为12x <<;……(1分+1分)(2)由已知B E C D =,得y x =代入2y x=,解得2x y ==;…………(1分)∵2B C B D D E E C =++=,即()()222y ED DE x DE y x DE DE -++-=+-=-=; ∴222DE =-,()222221282DE =-=-;………………………(1分)∴()2222222BD C E --===-,()22222642BD CE ==-=-,221282BD CE +=-;………………………………………………………(1分)∴222BD CE DE +=;…………………………………………………………(1分) (3)222BD CE DE +=成立;证明:如图,将A C E ∆绕点A 顺时针旋转90︒至A B H ∆的位置,则C E H B =,AE AH =,45ABH C ∠=∠=︒,旋转角90E A H ∠=︒;……………(1分) 连接H D ,在EAD ∆和H A D ∆中,∵AE AH =,45H AD EAH FAG EAD ∠=∠-∠=︒=∠,AD AD =, ∴EAD ∆≌H A D ∆;…………………(1分)∴D H D E =;又90H B D A B H A B D ∠=∠+∠=︒; ∴222BD HB DH +=;………………(1分) ∴222BD CE DE +=始终成立.……(1分)FDH A GEC B25. 解:(1)由直线AC 的解析式可得:()0,5-A ,()2,0C ;代入抛物线的解析式中可得:252002a a b b -+=⎧⎨=⎩,解得⎪⎩⎪⎨⎧=-=252b a ;………(2分) 故抛物线的解析式为:258522+--=x x y ;………………………………(1分)(2)易知()0,1B ,按题意本题分两种情况讨论:(I )当Q 在直线AC 上方的抛物线上时,ACQ ∆和BCQ ∆同底,若它们的面积相等,则A 、B 到直线CQ 的距离相等,即CQ ∥AB ;由于抛物线的对称轴为2-=x ,故()2,4-Q ;………………………………(2分)(II )当Q 在直线AC 下方的抛物线上时,设直线CQ 交x 轴于点L ,则A C Q ∆的面积为:Q C y y AL -⋅21,BCQ ∆的面积为:Q C y y BL -⋅21;若两个三角形的面积相等,则有BL AL =,即()0,2-L ; 易知直线CL 的解析式为:2+=x y ,联立抛物线的解析式得: 2282552y x x y x ⎧=--+⎪⎨⎪=+⎩,解得⎩⎨⎧==20y x 或⎪⎩⎪⎨⎧-=-=29213y x ; 故⎪⎭⎫⎝⎛--29,213Q ;………………………………………………………………(3分)综上所述,存在两个符合条件的点:()2,4-Q 或⎪⎭⎫ ⎝⎛--29,213Q ; (3)如图,设AOC ∆的外接圆圆心为S ,连接SP ,作PDE NDR ∠=∠,交y 轴于点R ,则ACO MDN PDR ∠=∠=∠;…………………………………(1分)由于P 是A C O 的中点,由垂径定理知SP 平行于y 轴,得: C D R A C O P S C ∠=∠=∠,RCD SPC ∠=∠;则SCP ∆∽DCR ∆;…………………………………………………………(2分)∴DCR∆也是等腰三角形,即DRCD=;∴OROC=;∵DRCPCS∠=∠;∴DRNDCM∠=∠;又∵NDRCDM∠=∠,DRCD=;∴DCM∆≌DRN∆;……………(2分)得RNCM=;故24C N C M C R O C-===;…(1分)∴CMCN-的值不变,恒为4.【注:直接写出结论4C N C M-=给1分】xyACPNDOEMFSR。
2013年遂宁市中考数学试卷及评分标准(Word版)

遂宁市2013年初中毕业暨高中阶段学校招生考试数学试卷【说明】全卷分为第Ⅰ卷和第Ⅱ卷,第Ⅰ卷1-2页,第Ⅱ卷3-10页,考试时间120分种,满分150分。
考试结束后,第Ⅱ卷和答题卡按规定装袋上交。
第Ⅰ卷(选择题 共40分)注意事项:1.答第Ⅰ卷前,考生务必将自已的学校、姓名、准考证号、考试科目填涂在答题卡上。
2.每小题选出答案后,用铅笔把答题卡上对应题目的答案标号涂黑。
如需改动,用橡皮擦干净后,再选涂其他答案,不能答在试卷上。
3.考试结束后,本试卷由考场统一收回,集中管理。
一、选择题:本大题共10个小题,每小题4分,共40分,在每个小题给出的四个选项中,只有一个符合题目要求1.-3的相反数是A .3B .-3C .3±D .132.下列计算错误..的是 A .-|-2|=-2 B .(a 2)3=a 5C .2x 2+3x 2=5x 2D .=3.左图所示的是三通管的立体图,则这个几何体的俯视图是A . B. C. D. 4.以下问题,不适合用全面调查的是A .了解全班同学每周体育锻炼的时间B .旅客上飞机前的安检C .学校招聘教师,对应聘人员面试D .了解全市中小学生每天的零花钱 5.已知反比例函数y =kx的图象经过点(2,-2),则k 的值为 A . 4B .-12C .-4D .-26.下列图案由正多边形拼成,其中既是轴对称图形又是中心对称图形的是A. B. C. D.主视方向7.将点A(3,2)沿x轴向左平移4个单位长度得到点A′,点A′关于y轴对称的点的坐标是A.(-3,2) B.(-1,2) C.(1,2) D. (1,-2)8.用半径为3cm,圆心角是1200的扇形围城一个圆锥的侧面,则这个圆锥的底面半径为A. 2πcmB.1.5cmC.πcmD.1cm9.一个不透明的口袋里有4张形状完全相同的卡片,分别写有数字1,2,3,4,口袋外有两张卡片,分别写有数字2,3,现随机从口袋里取出一张卡片,求这张卡片与口袋外的两张卡片上的数作为三角形三边的长,能构成三角形的概率是A.14B.12C.34D.110.如图,在△ABC中,∠C=900,∠B=300,以A为圆心,任意长为半径画弧分别交AB、AC于点M和N,再分别以M、N为圆心,大于MN21的长为半径画弧,两弧交于点P,连结AP并延长交BC于点D,则下列说法中正确的个数是①AD是∠BAC的平分线;②∠ADC=600 ;③点D在AB的中垂线上;④S△DAC∶S△ABC=1∶3A.1 B.2 C.3 D.4第Ⅱ卷(非选择题共110分)注意事项:1.第Ⅱ卷共8页,用钢笔或中性笔直接答在试卷上。
2013年全国中学生英语能力竞赛(NEPCS)初赛初二年级组试题参考答案及评分标准

2013年全国中学生英语能力竞赛(NEPCS)初赛初二年级组试题参考答案及评分标准2013年全国中学生英语能力竞赛(NEPCS)初赛初二年级组试题参考答案及评分标准听力部分(共四大题,计3分)I.Sentences(句子理解)(共5小题;每小题1分,计5分)1—5DCABDII.Responses(问句应答)(共5小题;每小题1分,计5分)6—10ACDBADialogues(对话理解)(共10小题;每小题1分,计10分)11—15CBDAC16—20BDACBIV.Passages(短文理解)(共10小题;每小题1分,计10分)21—25ADBCC26.radio27.funny28.growup29.something/things//doc/2d16877657 .html,eful for/helpful to/ helping笔试部分(共九大题,计120分)I.Multiple-choice(选择填空)(共15小题;每小题1分,计15分)31—35ADCDB36—40CBAAC41—45BDACDCloze(完形填空)(共15小题;每小题1分,计15分)A)46.tired47.classrooms/classroom48.Because49.enough50.experi ence51.remember52.failed53.less54.something/anything55.finishB)/doc/2d16877657.html,ter59.back60.happ y/glad/pleasedIII.Reading Comprehension(阅读理解)(共20小题;61—70题,每小题1分,71—80题,每小题2分,计分)A)61—63CBD64—65FTB)66—70ECBDAC)71.the teddy beara newspaper cartoonbutton eyesPresident RooseveltmoneyD)76.About23hours.Yes,he does.Cartoons and comedies.At the weekend.Football matches when England′s playing!IV.Sentence Pattern Transformation(句式转换)(共5小题;每小题2分,计10分)81favourite food82were you83better not84How do85were waitingV.Translation(翻译)(共5小题;每小题2分,计10分)86事实胜于雄辩。
2013年国考真题资料分析及解析(速算快解版)

120.关于该省高新技术产业各领域增加值情况,下列说法错误的是: A.生物医药和医疗器械领域的增加值超过全省高新技术产业增加值的 1/6
B.光机电一体领域与新材料领域增加值之和大约是全省高新技术产业增加 值的 1/2
C.航空航天领域实现的增加值可能不到全省高新技术产业增加值的 1/3 D.生物医药和医疗器械领域与电子信息领域增加值之和不到全省高新技术 产业增加值的 1/4
2013 国考资料分析真题妙解
12 月 4 日
YY 频道:595932
2013 国考资料分析真题妙解
快速分析过程: 2011-2012 年增加值:896.31*0.3074= 9*3=约等于 270 2010-2011 年增加值:显然小于 270,因为 2010 年增长值要比 2012 年小,增 长率相同。 则 2010-2012 年增长值 小于 270+270=540 而比 270 要大较多。结合选项选 B.
800 26
826
119.若该省高新技术产业增加值保持同样的增长速度,则 2012 年前十一个月高
新技术产业增加值比 2010 年同期约增加多少亿元?
A.210.7
B.486.3
C.275.5
D.68
5.6
【神算老周解析】:: 270-540 之间,明显大于 270,选 B.
12 月 4 日
YY 频道:595932
12 月 4 日
YY 频道:595932
2013 国考资料分析真题妙解
第五部分 资料分析 (共 20 题,参考时限 20 分钟) 所给出的图、表、文字或综合性资料均有若干个问题要你回答。你应根据资料 提供的信息进行分析、比较、计算和判断处理。 请开始答题: 一、根据以下资料,回答 116~120 题。 2011 年前十一个月,某省高新技术产业完成总产值 3763.00 亿元,实现增加值 8 96.31 亿元。增加值同比增长 30.74%,比规模以上工业增加值高 11.64 个百分点, 占规模以上工业增加值的比重达到 25.32%。高新技术产业各领域的增加值如下 图所示: 高新技术产业各领域增加值饼形图(单位:亿元)
2013年国考答案详解

2013年中央、国家机关录用公务员考试《行政职业能力测验》真题卷参考答案与解析1.【解析】D。
对于‚政府投入保障政策‛,《国家‚十二五‛时期文化改革发展规划纲要》作出明确表述,‚转变投入方式,通过政府购买服务、项目补贴、以奖代补等方式,鼓励和引导社会力量提供公共文化产品和服务,促进文化产业发展‛。
因此D项正确。
A、B 两项属于‚文化贸易促进政策‛,C项属于‚文化经济政策‛。
2.【解析】C。
1937年8月22日至25日,中共中央在陕北洛川召开政治局扩大会议,即‚洛川会议‛。
此次会议通过了《抗日救国十大纲领》,决定把党的工作重心放在敌后,在敌后放手发动群众,开展独立自主的游击战争,开辟敌后战场,建立敌后抗日根据地。
因此C项说法错误。
‚决定北上抗日的总方针‛于1935年6月的‚两河口‛会议确定。
3.【解析】D。
A项是《黄河大合唱》里的歌词。
B项是《游击队之歌》里的歌词。
C 项是《义勇军进行曲》里的歌词。
《黄河大合唱》是冼星海于1938年创作;《游击队之歌》由贺绿汀1937年作成;《义勇军进行曲》原是聂耳于1935年,为影片《风云儿女》所作的主题歌。
后来成为中国最著名的抗战歌曲。
新中国成立后,它被定为中华人民共和国国歌。
D项是《歌唱祖国》里的歌词。
《歌唱祖国》是王莘于1950年创作的爱国歌曲。
前三首歌都诞生于抗击日本帝国主义侵略的年代,而第四首歌诞生于新中国建立后,因此D项符合题意。
4.【解析】A。
恩格尔系数应对应居民生活水平,排除B项。
基尼系数应对应收入分配差距,排除C项。
生产者物价指数衡量工业企业产品出厂价格变动趋势和变动程度的指数,是反映某一时期生产领域价格变动情况的经济指标,排除D项。
A项对应正确。
5.【解析】A。
最低生活保障、税收、社会保险都属于收入再分配手段,B、C、D三项说法正确。
而最低工资保障属于初次分配的内容,因此A项符合题干要求。
6.【解析】D。
①句反映的事件是1894─1895的‚中日甲午战争‛以及1895年签订的《马关条约》。
2013年中央、国家机关公务员录用考试行政职业能力测试真题及答案解析【完整+答案+解析】

2013年国家公务员考试行测真题第一部分常识判断(共20题,参考时限15分钟)根据题目要求,在四个选项中选出一个最恰当的答案。
请开始答题:1.《国家“十二五”时期文化改革发展规划纲要》提出要加大政府对文化事业建设的投入力度。
下列属于政府投入保障政策的是:A.支持文化企业在海外投资、投标、营销、参展和宣传等活动B.继续完善文化市场的准入政策,吸引社会资本投资文化产业C.文化内容创意生产、非物质文化遗产项目经营享受税收优惠D.通过政府购买服务的方式,鼓励社会力量提供公共文化产品2.关于中国共产党历史上的重要会议,下列说法不正确的是:A.古田会议:解决新型人民军队建设问题B.遵义会议:纠正“左倾”的军事路线C.洛川会议:决定北上抗日的总方针D.瓦窑堡会议:确定建立抗日民族统一战线的方针政策3.中国人民艰苦卓绝的革命斗争中,诞生了不少脍炙人口的歌曲。
下列歌词均来自这些著名歌曲,其中创作时期与其他三首不同的是:A.河西山冈万丈高,河东河北高粱熟了B.我们生长在这里,每一寸土地都是我们自己的C.每个人被迫着发出最后的吼声D.宽广美丽的土地,是我们亲爱的家乡4.下列经济指标与衡量对象对应关系正确的是:A.赤字率——财政风险B.恩格尔系数——收入分配差距C.基尼系数——居民生活水平D.生产者物价指数——货币供应量5.下列不属于收入再分配手段的是:A.最低工资保障B.最低生活保障C.税收D.社会保险6.下列诗句反映的历史事件,按时间先后排序正确的是:①北师覆没威海卫,签订条约在马关②鸦片带来民族难,销烟虎门海滩前③武装起义占三镇,武昌汉口和汉阳A.①③②B.②③①C.①②③D.②①③7.某县开展行政执法大检查:①某食品厂生产腐竹时非法添加硼砂被当场查获,县工商局以证据确凿为由吊销该厂营业执照,不再另行举行听证会;②县矿业公司将含镉的工业废渣倾倒入河,造成河水镉浓度超标,县环保局、县水利局分别决定对其罚款10万元和5万元;③县卫生局接到群众举报某火锅店使用过期牛油,遂派一工作人员前往检查,对牛油进行查封、送检。
2013年中考语文一模各题评分细则

2013年中考语文一模各题评分细则2013年九年级语文综合练习评分细则第6题评分细则参考答案:中老年人比青少年更喜欢过中国传统节日,城镇青少年比乡村青少年更喜欢过西方节日。
(答题要点:要有两大群体的比较)0分题示例:无论是中年人跟青少年的城镇和乡村居民,相比之下,都更喜欢过中国传统节日。
(0分,表述不清)1分题示例:(1)中老年人喜欢过中国传统节日,而青少年也比较喜欢过中国传统节日。
(1分。
只答到了一个点,没有比较)(2)城镇居民更喜欢过中国传统节日的人数比乡村居民少。
(1分。
只答到了一个点,而且材料中提到的是比例而不是“人数”)(3)中老年人喜欢过中国传统节日,而青少年更喜欢过西方节日。
(1分。
青少年都更喜欢过中国传统节日的比例更大,只是比中老年人多而已)(4)大部分的青少年、中老年的乡村居民更喜欢过中国传统节日。
(1分。
没有比较两方)(5)中老年人大多数喜欢过中国节日,而城内的青少年41.7%喜欢过西方节日,城外的青年人70.1%喜欢过中国传统节日。
(1分。
第2、3句只是复述了题目内容,不给分)2分题示例:(1)中老年城镇和乡村居民大部分喜爱过中国节日。
青少年城镇居民大部分爱过西方节日,乡村居民则爱过中国节日。
(这答案只能给2分,只是答到了一个点,中老年与青少年的对比)(2)无论城镇居民还是乡村居民的中老年人和青少年都更喜欢过中国传统节日。
(2分。
只是中老年与青少年的对比)(3)乡村居民比城镇居民更喜欢过中国传统节日,城镇居民比乡村居民更喜欢过西方节日。
(2分,只答到了一个点)4分题示例:乡村居民比城镇居民更喜欢过中国传统节日,而青少年则比中老年人更喜欢过西方节日。
(4分)①传统的观点是秋是悲凉的,诗人却认为秋季之美胜过春天,见解独特。
②以传统的悲秋的情怀起笔,衬托出自己对秋天的喜爱之情,写法新奇别致。
1分示例:①以古人认为秋天悲凉引出自己对秋天的喜爱。
(1分。
只答立意)②表达了诗人赞美秋天的情怀。
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第27届中国化学奥林匹克(初赛)试题、解答、评分标准及评分细则第1题(12分) 写出下列化学反应的方程式1-1 加热时,三氧化二锰与一氧化碳反应产生四氧化三锰。
1-2 将KCN加入到过量的CuSO4水溶液中。
1-3 在碱性溶液中,Cr2O3和K3Fe(CN)6反应。
1-4 在碱性条件下,Zn(CN)42 和甲醛反应。
1-5 Fe(OH)2在常温无氧条件下转化为Fe3O4。
1-6 将NaNO3粉末小心加到熔融的NaNH2中,生成NaN3(没有水生成)。
第2题(23分) 简要回答或计算2-1 Bi2Cl82-离子中铋原子的配位数为5,配体呈四角锥型分布,画出该离子的结构并指出Bi 原子的杂化轨道类型。
2-2在液氨中,Eθ(Na+/Na)=-1.89V,Eθ(Mg2+/Mg)=-1.74V,但可以发生Mg置换Na的反应:Mg+2NaI=MgI2+2Na,指出原因。
2-3将Pb加到氨基钠的液氨溶液中,先生成白色沉淀Na4Pb,随后转化为Na4Pb9(绿色)而溶解。
在此溶液中插入两块铅电极,通直流电,当1.0 mol 电子通过电解槽时,在哪个电极(阴极或阳极)上沉积出铅?写出沉积铅的量。
2-4下图是某金属氧化物的晶体结构示意图。
图中,小球代表金属原子,大球代表氧原子,细线框出其晶胞。
2-4-1写出金属原子的配位数(m)和氧原子的配位数(n)。
2-4-2写出晶胞中金属原子数(p)和氧原子数(q)。
2-4-3写出该金属氧化物的化学式(金属用M表示)。
2-5向含[cis-Co(NH3)4(H2O)2]3+的溶液中加入氨水,析出含{Co[Co(NH3)4(OH)2]3}6+的难溶盐。
{ Co[Co(NH3)4(OH)2]3}6+ 是以羟基为桥键的多核络离子,具有手性。
画出其结构。
2-6向K2Cr2O7和NaCl的混合物中加入浓硫酸制得化合物X(154.9 g mol-1)。
X为暗红色液体,沸点117 o C,有强刺激性臭味,遇水冒白烟,遇硫燃烧。
X分子有两个相互垂直的镜面,两镜面的交线为二重旋转轴。
写出X的化学式并画出其结构式。
若画成两个Cr-O单键,只得0.5分; 若画成一个Cr-O单键和一个Cr=O双键,不得分。
2-7实验得到一种含钯化合物Pd[C x H y N z](ClO4)2,该化合物中C和H的质量分数分别为30.15% 和5.06%。
将此化合物转化为硫氰酸盐Pd[C x H y N z](SCN)2,则C和H的质量分数分别为40.46%和5.94%。
通过计算确定Pd[C x H y N z](ClO4)2的组成。
2-8甲烷在汽车发动机中平稳、完全燃烧是保证汽车安全和高能效的关键。
甲烷与空气按一定比例混合,氧气的利用率为85%,计算汽车尾气中O2、CO2、H2O和N2的体积比(空气中O2和N2体积比按21: 79计;设尾气中CO2的体积为1)。
第3题(11分)白色固体A,熔点182o C,摩尔质量76.12 g mol-1,可代替氰化物用于提炼金的新工艺。
A的合成方法有:(1)142o C下加热硫氰酸铵;(2)CS2与氨反应;(3)CaCN2和(NH4)2S水溶液反应(放出氨气)。
常温下,A在水溶液中可发生异构化反应,部分转化成B。
酸性溶液中,A在氧化剂(如Fe3+、H2O2和O2)存在下能溶解金,形成取sp杂化的Au(I) 配合物。
3-1画出A的结构式。
3-2分别写出合成A的方法(2)、(3)中化学反应的方程式。
3-3画出B的结构式。
3-4写出A在硫酸铁存在下溶解金的离子方程式。
3-5 A和Au(I)形成的配合物中配位原子是什么?3-6在提炼金时,A可被氧化成C:2A→C + 2e-;C能提高金的溶解速率。
画出C的结构式。
写出C和Au反应的方程式。
第4题(7分)人体中三分之二的阴离子是氯离子,主要存在于胃液和尿液中。
可用汞量法测定体液中的氯离子:以硝酸汞(II)为标准溶液,二苯卡巴腙为指示剂。
滴定中Hg2+与Cl-生成电离度很小的HgCl2, 过量的Hg2+与二苯卡巴腙生成紫色螯合物。
4-1 简述配制硝酸汞溶液时必须用硝酸酸化的理由。
4-2 称取1.713g Hg(NO3)2 •x H2O,配制成500 mL溶液作为滴定剂。
取20.00 mL 0.0100 molL-1 NaCl标准溶液注入锥形瓶,用1mL 5% HNO3酸化,加入5滴二苯卡巴腙指示剂,用上述硝酸汞溶液滴定至紫色,消耗10.20 mL。
推断该硝酸汞水合物样品的化学式。
4-3 取0.500 mL血清放入小锥形瓶,加2mL去离子水、4滴5%的硝酸和3滴二苯卡巴腙指示剂,用上述硝酸汞溶液滴定至终点,消耗1.53mL。
为使测量结果准确,以十倍于血清样品体积的水为试样进行空白实验,消耗硝酸汞溶液0.80 mL。
计算该血清样品中氯离子的浓度(毫克/100毫升)。
第5题(10分)M3XY呈反钙钛矿结构,是一种良好的离子导体。
M为金属元素,X和Y 为非金属元素,三者均为短周期元素且原子序数Z(X)<Z(M)<Z(Y)。
M3XY可由M和X 、M和Y的二元化合物在约500K,3MPa的惰性气氛中反应得到。
为避免采用高压条件,研究者发展了常压下的合成反应:M + MXA + MY → M3XY + 1/2A2(g)A2无色无味。
反应消耗0.93g M可获得0.50 L A2气体(25o C, 100kPa)。
(气体常量R=8.314 kPa L mol-1 K-1)5-1计算M的摩尔质量。
5-2 A、M、X、Y各是什么?5-3写出M3XY发生水解的方程式。
5-4 M3XY晶体属于立方晶系,若以X为正当晶胞的顶点,写出M和Y的坐标以及该晶体的最小重复单位。
第6题(10分)某同学从书上得知,一定浓度的Fe2+、Cr(OH)4-、Ni2+ 、MnO42-和CuCl3-的水溶液都呈绿色。
于是,请老师配制了这些离子的溶液。
老师要求该同学用蒸馏水、稀硫酸以及试管、胶头滴管、白色点滴板等物品和尽可能少的步骤鉴别它们,从而了解这些离子溶液的颜色。
请为该同学设计一个鉴别方案,用离子方程式表述反应并说明发生的现象(若A与B混合,必须写清是将A滴加到B中还是将B滴加到A中)。
第7题(5分) 根据所列反应条件,画出A、B、C、D和F的结构简式。
第8题(10分) 画出下列反应中合理的、带电荷中间体1、3、5、7和8以及产物2、4、6、9和10的结构简式。
8-18-28-38-4第9题(12分)9-1常用同位素标记法研究有机反应历程。
如利用18O标记的甲醇钠研究如下反应,发现最终产物不含18O。
根据实验事实画出中间体的结构简式。
9-2某同学进行如下实验时在碱性条件下得到了两个产物D和E,产率分别为74.3%和25.7%。
(1)画出产物D 和E 的结构简式。
(2)指明此反应所属的具体反应类型。
(3)简述D 产率较高的原因。
(4)简述反应体系加入二氧六环的原因。
1-1 3Mn 2O 3+CO =2Mn 3O 4+CO 2 2分 1-2 4CN -+2Cu 2+=2CuCN +(CN)2 2分 1-3 Cr 2O 3+6Fe(CN)63-+10OH - =2CrO 42-+6Fe(CN)64-+5H 2O 2分 1-4 Zn(CN)42-+4H 2CO +4H 2O =4 HOCH 2CN +Zn(OH) 42- 2分 1-5 3Fe(OH)2=Fe 3O 4+H 2+2H 2O 2分 1-6 NaNO 3+3NaNH 2=NaN 3+NH 3+3NaOH 2分 1方程式正确才能得满分。
2若全部物质皆写对而未配平,可得1分。
Bi 2Cl 82-的结构:BiClClClBiClClClCl Cl2-或BiClClClBiCl ClClClCl2- 2分BiClClClBiClClClCl Cl2-.......未画成楔形键不扣分;不画电子对不扣分;若画了电子对且画成如上图(蓝)所示的连线,则与电子对相连的线不画成虚线(左)、虽画成虚线但远离Bi原子,扣0.5分?杂化轨道类型:sp3d2 1分MgI2在液氨中难溶。
1分答微溶或溶解度小,也可得1分。
阳极1分9/4mol 1分2-4-1:m=4,n=4。
m: 0.5分,n: 0.5分2-4-2:p=4,q=4。
p: 0.5,q:0.5分2-4-3:MO。
MO:1分4分未画成楔形键,也得4分只画出1个对应体,也得4分?X的化学式:CrO2Cl2 2分X的结构式:1分解法一:Pd[C x H y N z](ClO4)2中,C和H的比例为(30.15/12.01) : (5.06/1.008) =1:2即y=2x(1) 1分Pd[C x H y N z](SCN)2中,C和H的比例为(40.46/12.01) : (5.94/1.008) = 0.572即(x+2) / y=0.572 (2)综合(1)、(2),解得:x=13.89 ≈ 14, y=28 1分设Pd[C x H y N z](ClO4)2的摩尔质量为M:则14×12.01/M=30.15%, 得M=557.7 (g mol-1)1分z={557.7–[106.4+12.01×14+1.008 28+2×(35.45+64.00)]}/14.01=3.99=40.5分Pd[C x H y N z](ClO4)2的组成为Pd[C14H28N4](ClO4)2 。
0.5分解法二:设Pd[C x H y N z](ClO4)2的摩尔质量为M,比较Pd[C x H y N z](ClO4)2和Pd[C x H y N z](SCN)2知,Pd[C x H y N z](SCN)2的摩尔质量为:M-2×[35.45+64.00-(32.01+12.01+14.01)]=M-82.74 (g mol-1)根据C的质量分数,有:**×x=0.3015 M**×(x+2) =0.4046 ×(M-82.74)** =( 0.4046-0.3015) M-0.4046 ×82.74解得:M=557.7, x=142分根据H的质量分数,有:y =557.7×0.0506 / 1.008 =27.99 =28 1分则:z={557.7-[106.4+12.01×14+1.008 ×28+2 ×(35.45+64.00)]}/14.01=3.99=41分甲烷完全燃烧:CH4+2O2=CO2+2H2O1体积甲烷消耗2体积O2生成1体积CO2和2体积H2O1分由于O2的利用率为85%,反应前O2的体积2/0.85=2.35剩余O2的体积:2.35 – 2 =0.35 1分混合气中N2的体积:2.35 79/21= 8.84 N2不参与反应,仍保留在尾气中。