福建省福州市第八中学2014-2015学年高二下学期期末考试化学试题【含答案】
福建省福州市第八中学2014-2015学年高二上学期期中考试英语试题 Word版含答案
Where is the woman going tonight?A. To a cinema.B. To her company.C. To a restaurant.1.How will the speakers go to concert?A. By bus.B. By car.C. By subway.2.How much did the man pay for the camera?A. $150B.$175C. $2003.What is the weather like now?A. Rainy.B. Cloudy.C. Sunny.4.What are the speakers talking about?A. A holiday plan.B. A city.C. A movie.第二节（共15题；每小题1.5分，满分22.5分）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，你将有时间阅读每个小题，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6至7题5.Where was the man when his car broke down?A. In his office.B. In a parking lot.C. In a garage.6.How did the man get home?A. By truck.B. By car.C. By train.听第7段材料，回答8至9题7.What is the relationship between the two speakers?A. Husband and wife.B. Teacher and student.C. Co-workers.8.What does the woman think of making small talk?A. Easy.B. Awkward.C. Time-wasting.听第8段材料，回答10至12题9.What is the man‟s problem?A. His cooker doesn‟t work.B. There is no hot water system at his flat.C. The owner wants to ask for more money.10.What‟s the man attitude towards the owner?A. Angry.B. Understandable.C. Satisfied.11.What must an owner do before asking a person to move out?A. Check all the things in the house.B. Tell the person in advance.C. Get the person‟s permission.听第9段材料，回答13至16题12.What is the relationship between the speakers?A. Colleagues.B. Neighbours.C. Strangers.13.What can the man offer the woman?A. A special price.B. Best-quality goods.C. Good after-sale service.14.How does the woman feel about the man?A. Grateful.B. Disappointed.C. bored.15.What can we learn from the conversation?A. The woman refuses the man‟s offer.B. The man will arrive in a couple of minutes.C. The woman knew the man through her husband.听第10段材料，回答17至20题16.When will the tour start?A. In 10 minutes.B. In 20 minutes.C. In 30 minutes17.What is forbidden during the tour?A. Taking photos.B. Asking questions.C. Making phone calls.18.What can the listeners do after lunch?A. Read books.B. Buy gifts.C. Visit the student centre.19.When does the speaker suggest the listeners go to the coffee shop?A. Before the tour.B. During the tour.C. After the tour.II 单项填空(共15小题；每小题1分，满分15分)21. any bread that morning, we had nothing to eat.A. Being not madeB. Not having madeC. Having not madeD. Not having been made22.---Do you know Jim failed to pass the driving test?---I don‟t know, .A. nor don‟t I careB. nor do I careC. I don‟t care neitherD. I don‟t care also23. I believe the beauty of nature there will make an excellent _____ upon the tourists.A. guideB. adjustmentC. impressionD. attraction24. ---Why did you the third paragraph of your rewritten composition?---Because I thought it was off the point.A. play outB. hand outC. carry outD. leave out25. All of them felt it strange that he the meeting.A. attendB. would have attendedC. could attendD. were to attend26．—How does the story The Emperor's New Clothes_______？—Once upon a time, there was a silly emperor who loved clothing more than anything else...A．clarify B. inform C. go D. announce27. Film has a much shorter history, especially when such art forms as musicand painting.A. compare toB. compared toC. comparing toD. having compared to28．Can you think of some cases________drivers obviously knew the traffic rules but didn't obey them?A. whereB. whyC. asD. which29. Though computers can do a lot of work man can‟t do, they can‟t completely_______ human beings.A. replace withB. in placeC. take placeD. take the place of30. ---How often do you call your parents?--- ,but usually once a week.A. Forget itB. Once in a whileC. It dependsD. I‟ve no idea31. I was so familiar with him that I recognized his voice I pick up the phone.A. whileB. afterC. in caseD. the instant32. It was the soldier did at the spot of the accident, not what he said,moved all the citizens of the whole city.A. that; whatB. what; thatC. that; thatD. what; which33. Due to the traffic jam, thousands of passengers remained on the freeway.A. stuckB. stickingC. to be sticking D .to have stuck34. ---V olunteering is getting popular in China.---Indeed. More people are now aware that helping others benefits themselves a lot.A. casuallyB. accuratelyC. tightlyD. increasingly35. ---Mary, let‟s go to the bookshop this weekend. Will you be ?---Sorry, but I‟m going to visit my uncle in the countryside.A. eagerB. suitableC. convenientD. availableIII.阅读理解：40分(共20小题；每小题2分，共40分)AIt turns out that the Broadway experts agree with me. The show has received nine Tony nominations(提名). Tony awards are the top prizes for Broadway shows. Laura Osnes, who plays the role of Cinderella, has been nominated for the Tony for best actress in a musical.How similar is the show to the story of Cinderella you know? The answer, of course, depends on which version of the story you‟ve seen or read. In an interview with TIME FOR Kids, Osnes pointed out that many people are familiar with the Disney movie version. There are some differences between that movie and the Broadway show. For one thing, the stepmother and the sisters are not as cruel in the show as in the movie. Also, in the Broadway version, when Cinderella escapes from the dancing party, she picks up her shoe after dropping it. So how does the prince find Cinderella again? You‟ll have to see the show to find out!I just think anyone would enjoy this play, including both kids and adults. The attention to detail is amazing. In my opinion, this play deserves a double thumbs-up!36. The author was excited because .A. he has grown up knowing the story of CinderellaB. he could see Rodgers & Hammerstein‟s Cinderella on stageC. the lights became dark and the orchestra started to playD. the stage had a magical appearance with the tree on it37. Which of the following shows that the Broadway experts agree with the author?A. They all agree the musical is more beloved than the story.B. They all agree the story is more complicated than the musical.C. Broadway experts have given the show nine Tony nominations.D. Laura Osnes has been nominated for the Tony for best actress.38. What is one of the differences between the Disney movie and the Broadway showaccording to the passage?A. Cinderella picks up her shoe after dropping it in the movie.B. The stepmother and the sisters are crueler in the movie.C. The prince doesn‟t find Cinderella in the show.D. Cinderella doesn‟t escape from the dancing party in the show.39. According to the author, this show is suitable .A. only for grown-upB. only for children.C. for both grown-ups and childrenD. for either grown-ups or childrenBGlobal Positioning Systems（GPS）are now a part of everyday driving in many countries. These satellite-based systems provide turn-by-turn directions to help people get to where they want to go. But, they can also cause a lot of problems, send you to the wrong place or leave you completely lost. Many times, the driver is to blame. Sometimes a GPS error is responsible. Most often, says Barry Brown, it is a combination of the two.We spoke to Mr. Brown by Skype （网络电话软件）. He told us about an incident involving a friend who had flown to an airport in the eastern United States. There he borrowed a GPS-equipped car to use during his stay. BARRY BROWN: “And they just plugged in an address and then set off to their destination. And, then it wasn‟t until they were driving for thirty minutes that they realized they actually put in a destination back on the West Coast where they lived. They actually put their home address in. So again, the GPS is kind of 'garbage in garbage out'.”Mr Brown says this is a common human error. But, he says, what makes the problem worse has to do with some of the shortcomings, or failures, of GPS equipment. BARRY BROWN: “One problem with a lot of the GPS units is that they have a very small screen and they just tell you the next turn. Because they just give you the next turn, sometimes that means that it is not really giving you the overview that you would need to know that it‟s going to the wrong place.”Barry Brown formerly served as a professor with the University of California, San Diego. While there, he worked on a project with Eric Laurier from the University of Edinburgh. The two men studied the effects of GPS devices on driving by placing cameras in people‟s cars. They wrote a paper based on their research. It is called “The Normal, Nat ural Troubles of Driving with GPS.”It lists several areas where GPS systems can cause confusion for drivers. These include maps that are outdated, incorrect or difficult to understand. They also include timing issues(时机问题) related to when GPS commands are given.Barry Brown says, “ To make GPS systems better we need a better understanding of how drivers, passengers and GPS systems work together.”40. In paragraph 2, Mr. Brown mentioned his friend in the conversation to _______.A. build up his own reputationB. laugh at his stupid friendC. prove the GPS system is only garbageD. describe an example of human error41. What is the disadvantage of small screens in GPS equipment according to the text?A. They just provide the next turn.B. They are harmful to eyes.C. They make drivers tired easily.D. They often break down suddenly.42. Which of the following statements would Barry Brown most likely agree with?A. GPS units are to blame for most GPS service failures.B. We should introduce higher standards for the driving license.C. Cameras are badly needed to help improve GPS systems.D. Drivers, GPS systems and passengers should unite to improve GPS systems.43. What is Mr. Brown‟s attitude towards GPS?A. Unconcerned.B.subjective.C. Objective.D. Critical.44. Which of the following statements can best describe the main idea of the passage?A. Driving with GPS can be difficult.B. Driving confusions can be caused by small screens.C. Driving without GPS should be much more convenient.D. GPS equipment in driving to be given up or improvedCWe‟ve all felt discouragement at one point or another in our lives. However, when this emotion bleeds into other aspects of our life, it can sometimes be inappropriate or even harmful. Many students have felt the effects of being overlooked by an adult. After the experience, students can be left feeling uninspired or discouraged.I was personally discouraged by an adult during my high school. After telling her what university I wanted to attend, she plainly told me I would not get in. I was completely shocked and angry at her statement. The adult may have not intended to hurt me with her words, but it had an after effect. The meeting made me think she had no belief that I could possibly succeed in the future. After that it caused me to try to avoid any future meeting with adults until absolutely necessary.We are all human; therefore, we can all understand that some days are more challenging. But when people allow situations of stress to consume(充满) them, they cannot perform their best. People should pay attention to how their reactions could affect the person they are interacting with. People have the potential to perform their best when they are indulged in the task at hand, but adults who come off in a rude and aggressive way through communication have an effect on teenager s‟ mind.Adults whether in schools, or any other institutions should work to tear down walls gently and create a safe space for the person they are serving. These adults should also help and contribute to a person‟s academic, personal and professional growth. High school is an important time when young people need someone to believe in them.In conclusion, I would like to add that it is not completely up to adults only. Students are responsible for seeking help from adults who are in authority(权威) positions. They are also responsible for the way they approach adults in their academic surroundings. Students can expect to be treated in a respectful way when they express at the beginning. Generally the responsibility lies on both parties. When both sides can communicate in a polite manner then the complete environment of the school has the potential to develop well.45. The passage is mainly about ______.A. the adults‟ r oles in schoolB. the skill to encourage studentsC. the way to communicate with childrenD. the importance of personal professional growth46. Who are responsible for children‟s development at school according to the writer?A. Students.B. Teachers.C. Headmasters.D. Both students and teachers.47. The underlined phrase probably “are indulged in” means “______”.A. are weak inB. are amazed atC. are interested inD. are unbearable with48. The writer once tried to avoid meetings with adults because ______.A. he was very busyB. he thought highly of himselfC. he was once hurt by an adultD. he couldn‟t get high marks at schoolDAre you a problem shopper? The answer is “Yes”, if you or someone else thinks that you sometimes get carried away with shopping. In other words, do you or does someone else think you are busy in extreme shopping? If people have regrets later about their shopping, or have an “out-of-control” feeling about the quantities of what they buy or the amount of money they use, they may be considered to be problem shoppers.Extreme shopping can lead to a more serious problem —addictive shopping. Addictive shoppers feel driven by the desire to shop and spend money. They experience great tension which drives them to shop and spend money and they feel a “rush” during the time they are occupied with the shopping activity.Extreme or addictive shopping may result from long-time unpleasant feelings, of which anxiety, pain and shame are common ones. When we feel bad inside, we often do something to make ourselves feel better. In this case, we often go shopping.A few people shop to relieve their boredom or emptiness. For some people, the motivation is a desire for status, power, beauty or success. Some love to shop as it makes them feel valued in the eyes of the shop assistants. Others shop simply because it makes them forget, at least temporarily, tension, fear or unhappiness in their life.Besides, shopping malls are designed to encourage continual shopping. For instance, th ere are some malls where you can‟t see clocks displaying the time because they don‟t want you to become too aware of the time you spend there.What‟s more, food courts, coffee shops and restrooms are provided, so you don‟t have to leave the mall because of your physical needs.Therefore, once you become aware of how market forces work, you will certainly come to control your shopping behavior. For example, how much time you will spend and what areas you will visit can be decided before you enter the mall. Keep a written account of what items you will buy and how much money you will spend. Make a plan for what you are going to buy before you feel the urge to shop and then stick to it. That is vital for gaining self-control.49. Which of the following people may not be problem shoppers?A. Those who cannot control the amount of money they use.B. Those who just walk around the shopping malls.C. Those who are occupied in too much shopping.D. Those who feel sorry for their shopping.50. According to the passage, what may not result in addictive shopping?A. The awareness of how market forces work.B. The desire for status, power, beauty or success.C. Boredom, emptiness, tension, fear or unhappiness in people‟s life.D. Long-time bad feelings of anxiety, pain and shame.51. What does the author suggest to control our shopping behaviour?A. Never going to the shopping malls because there are many tricks.B. Applying for a credit card before we go shopping.C. Making the shopping time as short as possible.D. Making a shopping list before we go shopping.52. The author writes this passage to _______.A. inform the shopping malls how to attract more shoppersB. provide solutions to the problem shoppingC. scold the problem shoppersD. tell a shopping storyEGoldie's SecretShe turned up at the doorstep of my house in Cornwall. No way could I have sent her away. No way, not me anyway. Maybe someone had kicked her out of their car the night before. "We're moving house.'; "No space for her any more with the baby coming." "We never really wanted her, but what could we have done? She was a present." People find all sorts of excuses for abandoning(放弃) an animal. And she was one of the most beautiful dogs I had ever seen.I called her Goldie. If I had known what was going to happen，I would have given her a more creative name. She was so unsettled during those first few days. She hardly ate anything and had such an air of sadness about her. There was nothing I could do to make her happy, it seemed. Heaven knows what had happened to her at her previous owner's. But eventually at the end of the first week she calmed down. Always by my side, whether we were out on one of our long walks or sitting by the fire.That's why it was such a shock when she pulled away from me one day when we were out for a walk. We were a long way from home, when she started barking and getting very restless. Eventually I couldn't hold her any longer and she raced off down the road towards a farmhouse in the distance as fast as she could.By the time I reached the farm I was very tired and upset with Goldie. But when I saw her licking (舔) the four puppies (幼犬) I started to feel sympathy towards them. "We didn't know what had happened to her," said the woman at the door. "I took her for a walk one day, soon after the puppies were born, and she just disappeared." "She must have tried to come back to them and got lost," added a boy from behind her. 'I must admit I do miss Goldie, but I've got Nugget now, and she looks just like her mother. And I've learnt a good lesson: not to judge people.53. In her first few days at the author's house, Goldie .A. felt worriedB. was angryC. ate a littleD. sat by the fire54. Goldie rushed off to a farmhouse one day because she .A. saw her puppiesB. heard familiar barkingC. wanted to leave the authorD. found her way to her old home55. The passage is organized in order of .A. timeB. effectC. importanceD. complexityIV.根据所提供语境，用方框中所给短语的适当形式填空。
福建省莆田第八中学2014-2015学年高二上学期期中考试化学(理)试题
福建省莆田第八中学2014-2015学年高二上学期期中考试化学（理）试题1．氢能是一种既高效又干净的新能源，发展前景良好，用氢作能源的燃料电池汽车倍受青睐。
我国拥有完全自主知识产权的氢燃料电池轿车“超越三号”，已达到世界先进水平，并加快向产业化的目标迈进。
下列有关说法正确的是()A．氢制备工艺廉价易行，且储存方便B．燃料电池车中能量转化率为100%C．燃料电池车是直接将化学能转化为电能D．利用热电厂的电能电解蒸馏水制备氢气是一种环保之举2．下列说法不正确的是()A．化学变化过程是原子的重新组合过程B．根据化学反应中的能量变化情况，化学反应可分为吸热反应和放热反应C．化学反应中能量变化多少与其反应物用量有关D．化学反应中的能量变化都是以热能形式表现出来的3．下列反应既是氧化还原反应，又是吸热反应的是()A．铝片与稀H2SO4反应B．Ba(OH)2·8H2O与NH4Cl的反应C．灼热的炭与CO2反应D．甲烷在O2中的燃烧4．已知：H2(g)＋F2(g) ===2HF(g)ΔH＝－270 kJ·mol－1，下列说法正确的是() A．2 L氟化氢气体分解成1 L氢气与1 L氟气吸收270 kJ热量B．1 mol氢气与1 mol氟气反应生成2 mol液态氟化氢放出的热量小于270 kJC．相同条件下1 mol氢气与1 mol氟气的能量总和大于2 mol氟化氢气体的能量D．1个氢气分子与1个氟气分子反应生成2个氟化氢气体分子放出270 kJ 热量5．染料敏化太阳能电池（简称DSC）工作时类似叶绿素的染料吸收太阳光，产生电子，电子再被电极收集，然后通过外电路，回到反电极产生光电流。
该过程中的能量转化形式为（）A．太阳能→电能B．太阳能→化学能C．化学能→电能D．电能→化学能6．下列各反应均为放热反应，同温同压下下列各热化学方程式中ΔH最小的是（）A．2A( l ) + B ( l ) ===2C( g ) ΔH1B．2A( g ) + B ( g ) ===2C( g ) ΔH2C．2A( g ) + B ( g ) ===2C( l ) ΔH3D．2A( l ) + B ( l ) ===2C( l ) ΔH47．SF6是一种优良的绝缘气体，分子结构中只存在S－F键。
福建省福州市第八中学2014-2015学年高二上学期期中考试地理(文)试题
福建省福州市第八中学2014-2015学年高二上学期期中考试地理（文）试题右图为某些地区主要农作物及熟制示意图，读图完成1－2题 1．图中能正确反映长江三角洲和松嫩平原农业生产状况的是A ．①②B ．③④C ．①③D ．②④2．图中①和③两地农业生产方式及农作 物品种不同的主要原因是A ．水热条件差异B ．地形差异C ．土壤差异D ．生产习惯差异3.关于松嫩平原和长江三角洲，下列叙述不正确的是：A.松嫩平原是温带季风气候，夏季温度高且多雨，但是由于纬度位置高，所以热量条件不如长江三角洲。
B.长江三角洲是亚热带季风气候，夏季高温多雨，雨热配合条件好。
C.二者都是雨热同期的季风气候D.松嫩平原的温暖季节长，所以农作物的生长期长4.在阴雨天气中，下列遥感分辨率最高的是 A.可见光飞机遥感 B.可见光卫星遥感C.微波飞机遥感D.微波卫星遥感现代化信息技术广泛地应用在“2008建发厦门国际马拉松赛”组织赛事的各个部门，成为本届马拉松赛的新亮点。
右图为120急救指挥中心出救示意图，读图完成5—6题：5．组委会为了及时了解赛事的赛场实况，采用的地理信息技术是 A ．GMS B ．GPS+GISC ．GPS+RSD ．GIS+RS6. 组委会接到赛道某地点一个急救电话，需要通过120急救指挥中心在最短的时间内指挥救护车到达事故地点。
如图所示，120急救指挥中心要确定哪一辆救护车离事故地点最近，可以利用的技术是：A ．RSB ．GPS+GISC ．GPS+RSD ．GIS+RS在遥感技术中，可以根据植物反射波谱特征判断植物的生长状况，从而进行作物估产。
读图，回答7—8题7.图中重度病害植物反射率高于健康植物反射率的波段是 ①红外线 ② X 光③可见光 ④紫外线A ．① ④B ．③ ④C ．① ②D ．① ③8．根据上图的原理，可用遥感技术直接①划分植物类型 ②判断植物生长的土壤类型 ③监测树木的生长状况④估测粮食作物的产量A ． ① ④B ．② ③C ．③ ④D ．① ③气候条件是影响建筑类型、风格的主要因素之一。
福建省福州市第八中学2014届高三毕业班第一次质检数学(文)试题
A B C D第Ⅰ卷（选择题共60分）一、选择题：（每小题5分，共60分. 在给出的A、B、C、D四个选项中，只有一项符合题目要求，在答题纸的相应区域内作答）1.已知全集{}0,1,2,3,4U=，{1,2,3}A=，{0,2}B=，则)(BCAU等于A．{}1,2,3,4B．{}0,1,2,3C．{}1,2D．{}1,32.若a，b为平面向量，则“a=b"是“|a |=| b |”的A.充分不必要条件B.必要不充分条件C.充要条件D.既不充分也不必要条件3.命题“2,220x x x∃∈++≤R”的否定是A．2,220x x x∃∈++>R B．2,220x x x∃∈++≥RC．2,220x x x∀∈++>R D．2,220x x x∀∈++≤R4.函数()sinf x x=的图象向左平移4π个单位后，所得图象的一条对称轴是A．4x=-πB．4x=πC．2x=πD．34x=π5.函数2cosy x x xππ⎛⎫=-≤≤⎪的图象是6.若直线l与幂函数ny x=的图象相切于点A(2,8)，则直线l的方程为A．12160x y--=B．40x y-=C．12160x y+-=D．640x y--=7.已知，则A. a<b<cB. c<a<bC. a<c<bD. c<b<a8.函数22f(x)sin x x=-的图象A.关于直线对称B.关于直线对称C.关于点对称D.关于点对称9.已知单位向量a、b，满足⊥a b，则函数2()()f x x=+a b（x∈R）A. 既是奇函数又是偶函数B. 既不是奇函数也不是偶函数C. 是偶函数D. 是奇函数10.下列函数f(x)中，满足“且”的是A. B. C. D.11.已知函数的图象恒在直线y = -2x 的下方，则实数a 的取值范围是 A.B.C.D.12．定义两个实数间的一种新运算“*”：()lg 1010,x y x y *=+,x y ∈R .对任意实数,,a b c ，给出如下结论：①()()c b a c b a ****=； ②a b b a **=； ③()()()**a b c a c b c +=++； 其中正确的个数是 A ． 0 B ．1 C ．2 D ．3第Ⅱ卷（非选择题 共90分）二、填空题：本大题共4小题，每小题4分，共16分．将答案填在答题卡的相应位置．13．已知复数1i z =-，z 为z 的共轭复数，则|Z |=14.若函数f (x )导函数为，则函数f (x )的单调递减区间是______.15．在ABC ∆中，角,,A B C 所对的边分别为,,a b c ， 若22sin sin 2sin sin A B B C -=⋅，3c b =，则角A 的值为 ． 16．观察下列等式：12133+=； 781011123333+++=； 16171920222339333333+++++=； …则当m n <且,m n ∈N 表示最后结果.313232313333n n m m ++--++++= （最后结果用,m n 表示最后结果）． 三、解答题：本大题共6小题，共74分．解答应写出文字说明，证明过程或演算步骤．17．（本小题满分12分）已知函数()sin())33f x x x ππ=-+-．（Ⅰ）求函数1y f (x )=-的单调递增区间；（Ⅱ）设函数()(1sin )()g x x f x =+，求()g x 的值域.18．(本小题满分12分）已知二次函数21f (x )ax bx =++为偶函数，且f(－1) =－1. (I )求函数f(x)的解析式；(II)若函数g(x) = f(x) + (2－k) x 在区间(－2,2)上单调递增，求实数k 的取值范围.19．（本题满分12分）在△ABC 中，AC=3，（1）求sin A 的值； （2）△ABC 的面积S=3，求BC 的值.20．（本题满分12分）数列{}n a 的前n 项和2n n S an b =+，已知112a =，256a =．（1）求数列{}n a 的前n 项和n S ；（2）求数列{}n a 的通项公式； （3）设21nn a b n n =+-，求数列{}n b 的前n 项和n T ．21．(本小题满分12分）已知曲线32f (x )x bx cx =++在点A(-1,f(-1)),B(3,f(3))处的切线互相平行，且函数f(x)的一个极值点为x = 0.(I)求实数b,c 的值； (II )若函数1[3]2y f (x ),x ,=∈-的图象与直线y=m 恰有三个交点，求实数m 的取值范围；22．(本小题满分14分)已知函数()2e x f x ax bx =++．（Ⅰ）当0,1a b ==-时，求()f x 的单调区间； （Ⅱ）设函数()f x 在点()(),P t f t ()01t <<处的切线为l ，直线l 与y 轴相交于点Q .若点Q 的纵坐标恒小于1，求实数a 的取值范围．稿 纸福州八中2013—2014高三毕业班第一次质量检查数学(文)试卷参考答案及评分标准选填题：DACBBA BDCCAD2 （－1，3）3π 22n m - 解答题：17. 本题主要考查三角函数的恒等变换，三角函数的基本性质，考查运算求解的能力，化归与转化的思想．满分12分.解:（Ⅰ）()2sin()2sin 33f x x x ππ=+-=，………………………………3分 sin 2,2]()22y x k k k Z ππππ=∈函数的单调递增区间是[-+，∴1y f (x )=-的单调增区间是[2k -,2k ]k 22Z ππππ+∈ …………………6分（Ⅱ）由（Ⅰ）可得，2()2(1sin )sin 2sin 2sin g x x x x x =+=+，………7分 设sin t x =，当x R ∈时，[1,1]t ∈-，则2211()222()22h t t t t =+=+-， ……………………………………………9分由二次函数的单调性可知，min 1()2h t =-，又(1)0,(1)4,h h -==max ()4h t ∴=, …………………………………………11分则函数()g x 的值域为1[,4]2-． …………………………………………………12分19.解：(1)由24π2Sin(A+4π)=1.因为0<A<π,即4π<A+π<5π. 所以A+4π=2π, 故A=4π.所以（2）由S=12AC·，得,由余弦定理得BC 2=AC 2+AB 2-2AC·ABcos A=9+8-2×3×故20.解：（1）由1112S a ==，得112a b =+；由21243S a a =+=，得4423a b =+． ∴223a b a b +=⎧⎨+=⎩，解得11a b =⎧⎨=⎩， 故21n n S n =+ ………… 4分 （2）当2n ≥时，2232212(1)(1)(1)11(1)n n n n n n n n n n a S S n n n n n n ----++-=-=-==+++． 由于112a =也适合221n n n a n n +-=+． ∴通项221n n n a n n +-=+ ………8分（3）21111(1)1n n a b n n n n n n ===-+-++．∴数列{}n b 的前n 项和1211111111122311n n n T b b b b n n n n -=++++=-+-++-+--+ 1111nn n =-=++ ……… 12分22．本小题主要考查函数、导数等基础知识，考查推理论证能力、运算求解能力，考查分类与整合思想、数形结合思想、化归与转化思想．满分12分．解：（Ⅰ）当0,1a b ==-时，()e xf x x =-，()e 1xf x '=-，……………………1分所以，当(,0)x ∈-∞时，()0f x '<；当(0,)x ∈+∞时，()0f x '>；………3分 所以函数()f x 的单调递减区间为(),0-∞，单调递增区间为(0,)+∞．……4分 （Ⅱ）因为()2xf x e ax b '=++，所以()(),P t f t 处切线的斜率()2t k f t e at b '==++， 所以切线l 的方程为()()()22t t y e at bt e at b x t -++=++-，令0x =，得()21t y t e at =-- ()01t <<.………………………………6分当01t <<时，要使得点Q 的纵坐标恒小于1，只需()211t t e at --<，即()2110t t e at -++>()01t <<.……………… 7分 令()()211t g t t e at =-++，则()()2t g t t e a '=+，………………………………………………………… 8分 因为01t <<，所以1te e <<，①若21a ≥-即12a ≥-时，20te a +>， 所以，当()0,1t ∈时，()0g t '>，即()g t 在()0,1上单调递增，所以()(0)0g t g >=恒成立，所以12a ≥-满足题意.…………………………10分。
福建省福州市第八中学2014-2015学年高一上学期期中考试英语试题 Word版含答案
1. Who is the woman?A. Mary.B. Mary’s sister.C. Mary’s mother.2. When did the man live in London?A. Last year.B. Last month.C. When he was a child.3. What happened to the man just now?A. He met an old friend on the street.B. He mistook the woman for his friend.C. Lydia paid an unexpected visit to him.4. Why did the man change his mind probably?A. He didn’t bring enough money.B. He forgot his wallet.C. He didn’t need that much fruit.5. What are the speakers mainly talking about?A. The role of shopping in people’s lives.B. How to promote sales.C. The importance of mass media.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8题。
6. What’s the most probable relationship between the speakers?A. Friends.B. Husband and wife.C. Neighbors.7. What are the speakers doing?A. Making a birthday cake.B. Cooking a huge dinner.C. Preparing for a party.8. What has the man finished doing?A. Putting up a big sign.B. Buying a tape.C. Putting candles on the cake.听第7段材料，回答第9、10题。
福建省福州市第八中学2014-2015学年高一上学期期中考试化学试题
1．近来我国某些城市将市区汽车排气管装上催化转换器，目的是：使碳氢化合物迅速转化为二氧化碳和水；氮的氧化物转化为氮气，使汽车尾气得到净化。
关于这两个目的所涉及的物质变化，下列说法正确的是A．均为氧化反应B．均为化学变化C．均为物理变化D．前者为化学变化，后者为物理变化2．物质的分类是化学研究的重要方法之一。
化学工作者经常根据物质的组成对物质进行分类研究。
近年来发现，在金属大气层中存在三氧化二碳。
下列物质与它属于同类的是A．C60、O3B．H2O2、N2O4C．H2SO4、H2CO3D．Na2SO3、KMnO43．下列各组内物质的转化，只通过一步反应不能完成的是A．Zn→H2B．CaO→CaSO4C．CO2→CaCO3D．Cu→Cu(OH)2 4．下列属于电解质并能导电的物质是A．熔融的NaCl B．KNO3溶液C．Na D．酒精5．已知硫、二氧化硫、三氧化硫三种物质的质量比为2:4:5，它们的物质的量之比为A．2:4:5 B．1:1:1 C．5:4:2 D．1:2:36．下列关于0.2mol/L K2SO4溶液的正确说法是A．IL溶液中K＋离子浓度是0.4mol/LB．500mL溶液中含有0.1N A个K+离子C．IL溶液中所含K＋、SO42－总数为0.3N AD．2L溶液中SO42－离子浓度是0.4mol/L7．容量瓶上标有下列五项中的哪几项①温度②物质的量浓度③容量④压强⑤刻度线A．①③⑤B．③⑤C．①②④D．②④8．下列化学反应中，不属于氧化还原反应的是A．KClO+CO2+H2O === KHCO3+HclO B．H2＋CuO △2OC．Fe2O3 +3CO高温 2 Fe + 3CO2D．2CO + O2点燃2CO29．下列有关化学基本概念与划分依据的联系正确的是A．氧化还原反应与非氧化还原反应：反应前后元素化合价是否变化B．纯净物与混合物：是否仅含有一种元素C．强电解质与弱电解质：溶液的导电能力大小D．溶液与胶体：能否发生丁达尔效应10．下列各组物质的溶液混合后，再加足量的稀硝酸，仍有沉淀存在的是A. K2CO3、CaCl2B. AgNO3、HClC. NaOH、CuSO4D. Na2CO3、BaCl2二、选择题（每小题3分，共30分，每小题只有一个正确的答案）11．N A表示阿伏加德罗常数，下列说法正确的是A．18g水中含有的原子数为2N AB．11.2L O2一定含有N A个原子C．标准状况下，N A个水分子所占体积为22.4LD．N A个氧分子和N A个氢分子的质量比等于16:112．火箭的主要燃料是偏二甲肼（用R表示）和四氧化二氮，在火箭发射时，两者剧烈反应产生大量气体并释放出大量的热，该反应的化学方程式为：R + 2N2O4 ＝3N2 + 4H2O + 2CO2，下列叙述错误的是A．此反应是氧化还原反应B．反应瞬间产生大量高温气体，推动火箭飞行C．在反应中N2O4做还原剂D．R的分子式为C2H8N213．下列操作中正确的是A．蒸发操作时，应使混合物中的水分完全蒸干后，才能停止加热B．蒸馏操作时，应使温度计水银球靠近蒸馏烧瓶的底部。
2014年福建省福州市八县一中高二下学期期末联考化学试题
2014年福建省福州市八县一中高二下学期期末联考化学试题可能用到原子量：C-12 H-1 O-16一、选择题（每小题只有一个正确答案，每小题2分，共44分）1．下列说法不正确的是（）A．离子晶体的晶格能越大，离子键越强B．阳离子的半径越大则可同时吸引的阴离子越多C．通常阴、阳离子的半径越小、电荷越大，该阴阳离子组成的离子化合物的晶格能越大D．拆开1mol离子键所需的能量叫该离子晶体的晶格能2．下列说法中正确的是（）A．共价键的键能越大，分子晶体的熔点越高B．失去电子难的原子获得电子的能力一定强C．在化学反应中，某元素由化合态变为游离态，则该元素一定被还原D．电子层结构相同的不同简单离子，其半径随核电荷数增多而减小3．根据电子排布的特点，Cu在周期表属于（）A．s区B．p区C．d区D．ds区4．几种短周期元素的原子半径及主要化合价如下表：A．X、Y元素的金属性X<YB．一定条件下，Z单质与W的常见单质化合生成ZW2C．Y的最高价氧化物对应的水化物能溶于稀氨水D．一定条件下，W单质可以将Z单质从其氢化物中置换出来5．已知1 g氢气完全燃烧生成水蒸气时放出热量121 kJ，氧气中1 mol O＝O键完全断裂时吸收热量496 kJ，水蒸气中1 mol H－O键形成时放出热量463 kJ，则氢气中1mol H－H键断裂时吸收热量为( ) A．920 kJ B．557 kJ C．436 kJ D．188 kJ6．三氯化硼的熔点为-107℃，沸点为12.5℃，在其分子中键与键之间的夹角为120o，它能水解，有关叙述正确的是（）A．三氯化硼液态时能导电而固态时不导电B．硼原子以sp杂化C ．三氯化硼遇水蒸气会产生白雾D ．三氯化硼分子属极性分子 7．磷化硼是一种超硬耐磨涂层材料。
右图为其晶体结构中最小的重复结构单元，其中的每个原子均满足8电子稳定结构。
下列有关说法正确的是（ ）A ．磷化硼晶体的化学式为BP ，属于离子晶体B ．磷化硼晶体的熔点高，且熔融状态下能导电C ．磷化硼晶体中每个原子均形成4个共价键D ．磷化硼晶体结构微粒的空间堆积方式与氯化钠相同 8．几种短周期元素的原子半径及主要化合价如下表，相关说法正确的是A ．离子半径大小：r(M 3+) >r(T 2－)B ．其中R 的金属性最强C ．煤和石油中存在X 元素D ．L 、X 形成的简单离子核外电子数相等9．A 、B 、C 三种短周期元素在周期表中的位置如图所示，已知A 、C 可分别与B 形成化合物X 和Y ，A与B 的质子数之和等于C 的质子数，则下列说法正确的组合是 ①B 、C 形成的单质均存在同素异形体 ②X 的种类比Y 多③常温下，B 的氢化物不能电离出H＋④C 的最高价氧化物对应的水化物是强酸（ ） A ．①②③④B ．②④C ．①②D ．①③10. 如图是氯化铯晶体的晶胞，已知晶体中2个最近的Cs +离子核间距为a cm ，氯化铯的摩尔质量为M ，N A 为阿伏加德罗常数，则氯化铯晶体的密度为：A.338-⋅⋅cm g a N M A B.338A Ma g cm N -3-⋅cm C. 33-⋅⋅cm g aN M A D. 33-⋅cm g N Ma A 11．下列化合物分子中一定既含σ键又含π键的是（ ）A ．N2 B ．CO 2 C ．C 2H 6O D ．H 2O 2 12．下列各项所述的数字不是6的是 ( )A ．在NaCl 晶体中，与一个Na +最近的且距离相等的Cl - 的个数B ．在金刚石晶体中，最小的环上的碳原子个数C ．在二氧化硅晶体中，最小的环上的原子个数D ．在NaCl 晶体中，与一个Cl -最近的且距离相等的Na + 的个数13．有关乙烯分子中的化学键描述正确的是（）A．每个碳原子的sp2杂化轨道中的其中一个形成π键B．每个碳原子的未参加杂化的2p轨道形成σ键C．碳原子的三个sp2杂化轨道与其它原子形成三个σ键D．碳原子的未参加杂化的2p轨道与其它原子形成σ键14.下列数据是对应物质的熔点，有关的判断错误的是（）B．在共价化合物分子中各原子都形成8电子结构C．同族元素的氧化物可形成不同类型的晶体D．金属晶体的熔点不一定比分子晶体的高15．六氟化硫分子为正八面体构型（分子结构如图所示），难溶于水，有良好的绝缘性、阻燃，在电器工业方面具有广泛用途。
福建省福州市第八中学2014-2015学年高二上学期期中考试数学(文)试题 Word版含答案
1．为了解72名学生的学习情况，采用系统抽样的方法，从中抽取容量为8的样本，则分段的间隔为A.9B.8C.10D.72．掷一枚均匀的硬币两次，事件M ：一次正面朝上，一次反面朝上；事件N ：至少一次正面朝上，则下列结果正确的是A ．()()21,31==N P M PB ．()()21,21==N P M PC ．()()43,31==N P M PD ．()()43,21==N P M P3．已知,x y 的取值如下表所示，若y 与x 线性相关，且ˆ0.85yx a =+，则a =A ．2.2B ．2.6C ．2.8D ．2.94．用秦九韶算法求多项式()963445-+-=x x x x f ，当3-=x 时的值时，需要乘法运算和加法运算的次数分别为A ．4，2B ．5，3C ．5，5D ．5，45．双曲线方程为1322=-y x ，则它的右焦点坐标为A ．()0,2B ．⎪⎪⎭⎫⎝⎛0,36C ．⎪⎪⎭⎫⎝⎛0,332D ．⎪⎪⎭⎫⎝⎛0,336．准线为2=x 的抛物线的标准方程是（ ）A ． x y 42=B ．x y 82=C ． x y 42-=D ．x y 82-= 7．甲：1A 、2A 是互斥事件；乙：1A 、2A 是对立事件，那么A ．甲是乙的充分但不必要条件B ．甲是乙的必要但不充分条件C ．甲是乙的充要条件D ．甲既不是乙的充分条件也不是乙的必要条件 8．如图给出的是计算1001614121++++ 的值的一个程序框图，其中判断框中应填入的是 A ．100>i B ．100≤iC ．50>iD ．50≤i9．直线220x y -+=经过椭圆22221(0)x y a b a b+=>>的一个焦点和一个顶点，则该椭圆的离心率为B.12C.5D.2310．有3个兴趣小组，甲、乙两位同学各自参加其中一个小组，每位同学参加各个小组的可能性相同，则这两位同学参加同一个兴趣小组的概率为A13B12C23D34二、填空题：（共4小题，每小题4分，共16分） 11．执行右图程序，当输入39，24时，输出的结果是________.12．已知1F 、2F 为椭圆C ：1422=+y x 的左、右焦点，点P 在椭圆C 上，02160=∠PF F ，则=⋅21PF PF ________．13．若()52014化为六进制数为()6abcd ，则=+++d c b a _________14．为了解某校教师使用多媒体辅助教学的情况，采用INPUT a,bDO c=a-b a=b b=cLOOP UNTIL b<10 PRINT a简单随机抽样的方法，从该校200名授课教师中抽取20名教师，调查了解他们上学期使用多媒体辅助教学的次数，结果用茎叶图表示（如图所示），据此可估计该校上学期200 名教师中，使用多媒体辅助教学的次数在三、解答题：（共3小题，共34分）15．（本小题10分）已知条件:p ()；x x y 的定义域函数208lg 2++-=条件:q {}0,11>+≤≤-m m x m x ，若q p ⌝⌝是充分不必要条件，求实数m 的取值范围.16．（本小题12分）某校从高一年级学生中随机抽取40名学生作为样本，将他们的期中考试数学成绩（满分100分，成绩均为不低于40分的整数）分成六段：[40,50)，[50,60)，……，[90,100]后得到如图的频率分布直方图． （1）求图中实数a 的值；（2）若该校高一年级共有学生500人，试估计该校高一年级在这次考试中成绩不低于60分的人数．（3）若从样本中数学成绩在[40,50)与[90,100]两个分数段内的学生中随机选取两名学生，试用列举法．．．求这两名学生的数学成绩之差的绝对值不大于10的概率.17．（本小题12分）椭圆C ：)0(12222>>=+b a by a x 的两个焦点1F 、2F ，点P 在椭圆C 上，且211F F PF ⊥，3143421==PF ，PF .（1）求椭圆C 的方程；（2）若直线l 过圆()()51222=-++y x 的圆心M 交椭圆于 A 、B 两点，且A 、B 关于点M 对称，求直线l 的方程．第Ⅱ卷（共50分）一、选择题：（共2小题，每小题5分，共10分） 18．下列命题错误的是 A ．命题“x ∃∈R 使得210x x ++<”的否定是：“x ∀∈R 均有210x x ++≥”； B ．若p q ∧为假命题，则p ，q 均为假命题； C ．若[],0,1a b ∈，则不等式2214a b +<成立的概率是16π；D ．“平面向量a 与b 的夹角是钝角”的必要不充分条件是“0a b ⋅<”.19．,".0124,,:"是假命题若命题使对已知命题p m R m R x p x x ⌝=+⋅+∈∃∈∀则m的取值范围是 A ．22≤≤-m B ．2≥m C ．2-≤m D ．22≥-≤m m 或 二、填空题：（共2小题，每小题4分，共8分）三、解答题：（共3小题，共32分）22．（本小题10分）已知命题p :关于x 的不等式0422>++ax x 对一切R x ∈恒成立；命题q :函数()()xa x f 25--=是减函数,若q p ∨为真命题,q p ∧为假命题,求实数a 的取值范围.23．（本小题10分）已知袋子中放有大小和形状相同的小球若干，其中标号为0的小球1个，标号为1的小球1个，标号为2的小球n 个。
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福州八中2014—2015学年第二学期期末考试高二化学 化学反应原理考试时间：90分钟 试卷满分：100分2015.6.10 可能用到的相对原子质量：H-1 O-16 Cu-64 Ag-108 Cl-35.5 Fe-56 Na-23第Ⅰ卷 （共42分）一、选择题（每小题只有一个选项符合题意，每小题1分，共10分）1．下列化学用语描述中正确的是 （ ）A ．含18个中子的氯原子的核素符号：Cl 1735B ．比例模型可以表示CO 2 分子或SiO 2分子C ．HCO -3的电离方程式为：HCO -3+ H 2O CO -23+H 3O +D ．次氯酸的结构式：H －Cl －O2．在研究物质变化时,人们可以从不同的角度,不同的层面来认识物质变化时所引起的化学键及其能量变化,据此判断以下叙述中错误的是（ ）A ．化学反应的实质是旧化学键断裂和新化学键生成B ．所有化学变化一定遵循质量守恒和能量守恒C ．在化学反应中,破坏旧化学键吸收的能量大于形成新化学键释放的能量时,该反应是吸热反应D ．化学键的变化必然会引起能量变化，所以能量变化也一定会引起化学变化3．下列溶液一定呈酸性的是（ ）A ．pH 小于7的溶液B ．含有H +的溶液C ．滴加酚酞显无色的溶液D ．c （H +）＞c （OH ﹣）溶液 4．某原电池反应原理示意图如图．下列有关该原电池的说法正确的是（ ）A ．将电能转化为化学能B ．电子从锌片经导线流向铜片A电流计 稀硫酸C．一段时间后，铜片质量减轻D．锌片发生还原反应5．硫代硫酸钠溶液与稀硫酸反应的化学方程式为：Na2S2O3 + H2SO4 == Na2SO4 + SO2↑+ S↓ + H2O下列各组实验中最先出现浑浊的是（）A．20℃5 mL 0.1 mol·L-1的Na2S2O3溶液，10mL 0.1 mol·L-1的H2SO4溶液，5mL H2O B．20℃5 mL 0.2mol·L-1的Na2S2O3溶液，5 mL 0.2 mol·L-1的H2SO4溶液，10mLH2O C．30℃5mL0.1 mol·L-1的Na2S2O3溶液，10mL 0.1 mol·L-1的H2SO4溶液，5mLH2O D．30℃5 mL0,2 mol·L-1的Na2S2O3溶液，5 mL 0.2 mol·L-1的H2SO4溶液，10mL H2O6．在0.1mol/L的CH3COOH溶液中，要促进醋酸电离，且c(H+)增大，应采取的措施是（）A．加入0.1mol/L HCl B．加入NaOH溶液C．升温D．加水7．一定条件下，在体积一定的密闭容器中加入1mol N2和3mol H2发生反应：N2+3H22NH3（正反应是放热反应）．下列有关说法正确的是（）A．降低温度可以加快反应速率B．达到化学反应限度时，生成2molNH3C．向容器中再加入N2，可以加快反应速率D．1mol N2和3mol H2的总能量低于2mol NH3的总能量8．下列所加的物质属于催化剂的是（）A．电解水制氢气时，加入少量的Na2SO4B．利用H2O2水溶液制氧气时，加入少量的MnO2固体C．实验室用浓盐酸制氯气时，需加入MnO2固体D．纯锌与硫酸反应制氢气时，滴入少量硫酸铜9．某原电池总反应的离子方程式为2Fe3++Fe====3Fe2+，能实现该反应的原电池是（）A．正极为Cu,负极为Fe,电解质为FeCl3溶液B．正极为C,负极为Fe,电解质为FeSO4溶液C．正极为Fe,负极为Zn,电解质为Fe2(SO4)3溶液D．正极为Ag,负极为Cu,电解质为CuSO4溶液10．下列各组离子在溶液中能大量共存的是（）A ．Ca 2+ 、HCO 3-、Cl -、K +B ．Al 3+、AlO 2-、HCO 3-、Na +C ．Fe 2+、NH 4+、SO 42-、S 2-D ．Fe 3+、SCN -、Na +、CO 32-二、选择题（每小题只有一个选项符合题意，每小题2分，共32分）11．如图，小烧杯放在一块沾有水的玻璃片上，加入NH 4Cl 固体与氢氧化钡晶体[Ba(OH)2·8H 2O ）]，并用玻璃棒搅拌，玻璃片上的水结成了冰。
由此可推断（ ）A ．该反应中，化学能转变成热能B ．反应物的总能量低于生成物的总能量C ．氯化铵与氢氧化钡的反应为放热反应D ．反应的热化学方程式为： 2NH 4Cl+Ba(OH)2==BaCl 2+2NH 3·H 2O ΔH <012．在H 2与Cl 2生成HCl 的反应中,已知断裂1 molH —H 键吸收的能量为akJ ，断裂1 molCl —Cl 键吸收的能量为bkJ ，形成1 molH —Cl 键放出的能量为ckJ ，则生成1 mol HCl 放出的能量为（ ）A ．(c-a-b)kJB ．(a+b-c)kJC ．(2c-a-b)kJD ．(2c-a-b)/2 kJ13．一种酸性燃料电池原理设计的酒精检测仪，负极上的反应：CH 3CH 2OH-4e -+H 2O====CH 3COOH+4H +。
下列有关说法正确的是（ ）A ．检测时,电解质溶液中的H +向负极移动B ．若有0.4 mol 电子转移，则在标准状况下消耗4.48 L 氧气C ．电池反应的化学方程式为CH 3CH 2OH+O 2====CH 3COOH+H 2OD ．正极上发生的反应为O 2+4e -+2H 2O====4OH -14．下列解释事实的方程式不正确．．．的是（ ） A ．测0.1 mol/L 的氨水的pH 为11： NH 3·H 2O NH 4+ +OH —B ．将Na 块放入水中，产生气体：2Na+2H 2O == 2NaOH+H 2↑C ．用CuCl 2溶液做导电性实验，灯泡发光：CuCl 2Cu 2+ +2Cl —D ．Al 片溶于NaOH 溶液中，产生气体：2Al+2OH —+2H 2O ==2AlO 2— +3H 2↑15．已知反应2SO 2(g)+O 2(g) 2SO 3(g)在反应过程中某一时刻SO 2、O 2、SO 3的浓度分别为0.2 mol·L -1、0.1 mol·L -1、0.2 mol·L -1。
当反应达到平衡时,可能存在的数据是（ ）A ．SO 2为0.4 mol·L -1,O 2为0.2 mol·L -1B ．SO 2为0.25 mol·L -1C ．SO 3为0.4 mol·L -1通电D ．SO 2、SO 3均为0.15 mol·L -116．有关零排放车载燃料电池（如右图）叙述正确的是（ ）A ．正极通入H 2,发生还原反应B ．负极通入H 2,发生还原反应C ．导电离子为质子,且在电池内部由正极定向移向负极D ．总反应式为2H 2+O 2====2H 2O17．己知：K sp (AgCl)=1.56×10﹣10 K sp (AgBr)=7.7×10﹣13 K sp (Ag 2CrO 4)=9.0×10﹣12，某溶液中含有C1＿、Br -、和CrO 42-，浓度均为0.010mo1·L -1，向该溶液中逐滴加入0.010mol·L -1的AgNO 3溶液时，三种阴离子产生沉淀的先后顺序为（ ）A ．C1- 、Br -、CrO 42-B ．CrO 42-、Br -、C1-C ．Br -、C1-、CrO 42-D ．Br - 、CrO 42-、C1-18．化学与社会、生活密切相关。
对下列现象或事实的解释正确的是（ ）19. 下列事实能说明醋酸是弱电解质的是（ ）①醋酸与水能以任意比互溶；②醋酸溶液能导电；③醋酸溶液中存在醋酸分子； ④常温下，0.1 mol/L 醋酸的pH 比0.1 mol/L 盐酸的pH 大；⑤醋酸能和碳酸钙反应放出CO 2； ⑥0.1 mol/L 醋酸钠溶液pH ＝8.9；⑦大小相同的铁片与同物质的量浓度的盐酸和醋酸反应，醋酸产生H 2速率慢。
A ．②⑥⑦B ．③④⑥⑦C ．③④⑤⑥D ．①②20．将浓度为0.1mol·L -1HF 溶液加水不断稀释，下列各量始终保持增大的是（ ）A ．c （H +）B ．）（）（HF c H c +C ．）（）（+H c F c -D ．）（）（）（HF c c H c F ∙+ 21．向20 mL NaOH 溶液中逐滴加入0.1 mol/L 醋酸溶液，滴定曲线如右图所示。
下列判断中，正确的是（ ）A ．在M 点，两者恰好反应完全B．滴定前，酸中c(H＋) 等于碱中c(OH－)C．NaOH溶液的物质的量浓度为0.1 mol/LD．在N点，c(CH3COO-)>c(Na+)>c(H+)>c(CH3COOH)22．水的电离常数如图两条曲线所示，曲线中的点都符合c（H+）×c（OH﹣）=常数，下列说法错误的是（）A．图中温度T1＞T2B．图中五点K w间的关系：B＞C＞A=D=EC．曲线a、b可以表示纯水的电离情况D．若处在B点时，将pH=2的硫酸溶液与pH=11的KOH溶液等体积混合后，溶液显酸性23．室温下，稀氨水中存在电离平衡NH3·H2O NH4++OH-，有关叙述正确的是（）A. 加入氯化铵固体，溶液中c(H)c(OH)+-减小B. 加水不断稀释，溶液碱性一定增强C. 加水稀释，平衡常数K b增大D．加入NaOH固体，平衡逆向移动24．下列说法中，正确的是（）A．已知25℃时NH4CN水溶液显碱性，则25℃时的电离常数K（NH3·H2O）＞K（HCN）B．25℃时，Mg（OH）2固体在20 mL 0.01mol/L氨水中的K sp比在20mL 0.01mol/L NH4Cl 溶液中的K sp小C．pH试纸测得新制氯水的pH为4.5D．FeCl3溶液和Fe2(SO4)3溶液加热蒸干、灼烧都得到Fe2O325．已知25℃时，电离常数K a(HF)=3.6×10－4mol·L－1，溶度积常数K SP(CaF2)=1.46×10－10mol3·L －3。
现向1L0.2mol·L－1HF溶液中加入1L0.2mol·L－1CaCl2溶液，则下列说法中正确的是（）A．25℃时，0.1mol·L－1HF溶液中pH=1B．K SP(CaF2)随温度和浓度的变化而变化C．该体系中有CaF2沉淀产生D．以上说法均不正确26．次氯酸可用于杀菌消毒。