2016年白云广雅九下二模试卷(附答案)
【全国百强校】广东省广雅中学2016届九年级下学期第二次模拟考试化学试题

试卷第1页,共12页绝密★启用前【全国百强校】广东省广雅中学2016届九年级下学期第二次模拟考试化学试题试卷副标题考试范围:xxx ;考试时间:86分钟;命题人:xxx学校:___________姓名:___________班级:___________考号:___________注意事项.1.答题前填写好自己的姓名、班级、考号等信息 2.请将答案正确填写在答题卡上第I 卷(选择题)一、选择题(题型注释)1、某金属R 与硝酸银溶液反应的化学方程式为:R+2AgNO 3R (NO 3)2+2AgR 与硝酸铜溶液不发生反应,关于R 的推断正确的是( ) A .R 的活泼性介于铜、银之间 B .R 能置换出酸中的氢 C .R 的活泼性比铜强D .R 的活泼性比铜强、银都弱2、苯甲酸(C 6H 5COOH)可用作食品防腐剂,其酸性比醋酸强。
下列对苯甲酸性质的推测不合理是( )A .苯甲酸溶液的pH 小于7B .苯甲酸溶液的pH 大于7C .苯甲酸溶液能使紫色石蕊试液变红色D .苯甲酸溶液不能使无色酚酞试液变色试卷第2页,共12页3、在化学反应MnO 2+4HCl(浓)====MnCl 2+2H 2O +Cl 2↑中,同种元素的化合价在化学反应前后变化最大的元素是A .MnB .ClC .HD .O试卷第3页,共12页第II 卷(非选择题)二、选择填充题(题型注释)4、有甲、乙、丙、丁4种物质,它们可能是Na 2CO 3、AgNO 3、BaCl 2、HCl .将甲的溶液与丁的溶液混合时产生无色气体,将甲的溶液与丙的溶液混合时无明显现象,则乙可能是( ) A .Na 2CO 3B .AgNO 3C .BaCl 2D .HCl5、下列实验方案中,能达到预期目的是( ) A .用氢氧化钠溶液除去二氧化碳中的氯化氢气体 B .用点燃的方法除去一氧化碳中混有少量的二氧化碳 C .用碳酸钠溶液除去氯化钠中含有少量氯化镁 D .用抽丝灼烧,闻气味的方法区别棉毛衫和羊毛衫6、下列有关气体的制取装置或实验操作,错误的是( )A .制取氧气的发生装置B .收集氧气C .检验二氧化碳是否收集满试卷第4页,共12页D .验证二氧化碳的水溶液显酸性7、制造下列物品应该用热固性塑料的是( ) A .电视机外壳B .雨衣C .食品袋D .电线外皮8、小明设计了趣味实验装置(如图),其气密性良好.若要使B 中尖嘴导管有“喷泉”产生,则A 中加入的固体和液体可能是( )A .氯化钠和水B .硝酸铵和水C .烧碱和水D .铜和稀硫酸9、将100g20%氯化钾溶液稀释到500g ,稀释后所得溶液中溶剂的质量是( ) A .100gB .400gC .480gD .500g10、火箭推进器中盛有液态物质X 和双氧水(H 2O 2),当它们混合反应时,放出大量的热,产生强大推动力.有关的化学反应为:X+2H 2O 2═N 2↑+4H 2O ,则X 的化学式为( ) A .NH 3B .N 2O 4C .NO 2D .N 2H 411、下列实际应用中,利用中和反应原理的是( ) A .用氢氧化钠溶液吸收二氧化硫 B .用氢氧化钠溶液处理泄漏的浓硫酸 C .用熟石灰和硫酸铜配制波尔多液 D .用生石灰作食品干燥剂12、根据化学基本概念和原理的知识,你认为下列叙述正确的是( ) A .分子可再分,原子不可再分试卷第5页,共12页B .有单质和化合物生成的反应一定是置换反应C .最外层电子数相同的粒子一定是同种元素D .复分解反应,反应前后元素化合价一定不会改变13、下列各组物质的溶液相互不能反应的是( ) A .氢氧化钾和硝酸 B .硝酸钡和碳酸钠 C .硝酸钠和氯化钾D .氢氧化钠和硫酸铜14、区别下列物质,选用方法或试剂不正确的是( ) A .物质:空气、氧气和氮气;使用的方法或试剂:燃着的木条 B .物质:黄铜和黄金;使用的方法或试剂:观察颜色 C .物质:铁粉和木炭粉;使用的方法或试剂:稀盐酸 D .物质:白酒和白醋;使用的方法或试剂:闻气味15、中小学生使用的涂改液中含有很多有害的挥发性物质,二氯甲烷(CH 2Cl 2)就是其中的一种,吸入后会引起慢性中毒,下列有关二氯甲烷的叙述中错误的是( ) A .二氯甲烷分子是由一个碳原子、两个氢原子和两个氯原子构成 B .一个二氯甲烷分子共含有五个原子 C .二氯甲烷是由三种元素组成 D .二氯甲烷是有机化合物16、通过学习化学,我们了解了许多化学物质,下列物质用途与其依据的性质或解释不符合的是( )A .炭黑常用来制作炭素墨水﹣﹣﹣﹣碳在常温下化学性质稳定B .氧气用于金属切割﹣﹣﹣﹣﹣氧气具有助燃性C .洗洁精用于除油污﹣﹣﹣﹣﹣洗洁精能溶解油污D .用食醋可除去热水瓶胆的水垢﹣﹣﹣﹣﹣食醋具有酸性17、为预防“非典”(SARS )病毒,教室喷撒过氧乙酸溶液后,室内充满过氧乙酸气味,这种现象说明( ) A .分子的质量和体积都很小 B .分子在不断地运动 C .分子间有一定的间隔试卷第6页,共12页D .分子是保持物质化学性质的最小粒子18、下列变化中,既有物理变化又有化学变化的是( ) A .面粉发酵B .洗洁精去油污C .米饭酿酒D .点燃蜡烛19、下面这些物质是同学们在家庭生活中经常用到的,其中属于纯净物的是( ) A .生理盐水B .小苏打C .医用酒精D .食醋20、不同物质的溶液酸碱性不同。
武汉二中广雅中学2016届九年级中考数学模拟试题二

武汉二中广雅中学2016届九年级中考数学模拟试题二一、选择题(共10小题,每小题3分,共30分) 1.实数77的值在( )A .0与1之间B .1与2之间C .2与3之间D .3与4之间2.分式xx1有意义,则x 的取值范围是( ) A .x <1B .x <1且x ≠0C .x ≠1D .x ≠0 3.运用乘法公式计算(3-a )(3+a )的结果是( )A .a 2-6a +9B .a 2-9C .9-a 2D .a 2-3a +94.下列事件是不可能事件的是( ) A .射击运动员射击1次,命中靶心 B .任取一个实数x ,都有|x |≥0C .画一个三角形,使其在边的长分别为8 cm 、6 cm 、2 cmD .抛掷一枚质地均匀且六个面分别刻有1到6的点数的正方体骰子,朝上一面的点数为6 5.下列计算正确的是( ) A .x 2+2x =3x 2B .x 6÷x 2=x 3C .x 2·(2x 3)=2x 5D .(3x 2)2=6x 4 6.如图,菱形OABC 的边OC 在y 轴上,A 点的坐标为(4,3),则B 点坐标为( ) A .(4,7) B .(4,8) C .(5,7)D .(5,8)7.如图是将正方体切去一个角后形成的几何体,则该几何体的左视图为( )8.某小组5名同学在一周内参加家务劳动的时间如下表所示,关于“劳动时间”的这组数据,以下说法正确的是( ) 劳动时间(小时)3 3.54 4.5 人数1121A .中位数是4,平均数是3.75B .众数是4,平均数是3.75C .中位数是4,平均数是3.8D .众数是2,平均数是3.89.如图,在矩形ABCD 中,已知AB =4,BC =3,矩形在直线上绕其右下角的顶点B 向右旋转90°至图①位置,再绕右下角的顶点继续向右旋转90°至图②位置,……,以此类推,这样连续旋转2017次后,顶点A 在整个旋转过程中所经过的路程之和是( ) A .2024πB .3025.5πC .3026πD .3026.5π10.如图,⊙O 中,点B 是半径OA 的中点,点C 是线段OB 的中点,点D 、E 是圆上的两点,ED ∥OA ,且∠DBE =90°,点F 是ED 的中点,OA =4,则线段CF 的长度为( )A .2B .7C .22D .3二、填空题:(每小题3分,共18分) 11.计算(-7)+5的结果为__________12.武汉园博会圆满闭幕,来自各地的游客体会了各式园林的独特之美.园区总面积超过2 130 000平方米,数字2 130 000用科学计数法表示为__________13.在一个不透明的口袋中,装有3个红球5个白球,它们除颜色外都相同,从中任意摸出一个球,摸到红球的概率为__________14.如图,将直角三角形ABC 沿着斜边上的中线CD 折叠后,B 点落到B '处,B 'C ∥AB ,则∠A 的度数为__________15.如图,两等腰直角三角形△ACB 、△DCE ,射线AD 交BE 于点F ,已知AC =2DC =4.当△DCE 绕点C 旋转时,线段AF 的长度的最大值为__________16.定义:将m 、n 两个数中较小数记作P |m 、n |,一次函数y =kx -4(k <0)与函数y =P |x 2-2,121+-x |的图象有且仅有一个公共点,则k 的取值范围是__________ 三、解答题(共8小题,72分) 17.(本题8分)解方程:4x -3=2(x -1)18.(本题8分)如图,B 、E 、C 、F 在同一直线上,AB =DE ,BE =CF ,∠B =∠DEF ,求证:AC ∥DF19.(本题8分)为了掌握我市中考模拟数学试题的命题质量与难度系数,命题教师赴我市某地选取一个水平相当的初三年级进行调研,命题教师将随机抽取的部分学生成绩(得分为整数,满分为160分)分为5组:第一组85~100;第二组100~115;第三组115~130;第四组130~145;第五组145~160,统计后得到如图所示的频数分布直方图(每组含最小值不含最大值)和扇形统计图,观察图形的信息,回答下列问题:(1) 本次调查共随机抽取了该年级_________名学生?并将频数分布直方图补充完整(2) 若将得分转化为等级,规定:得分低于100分评为“D ”,100~130分评为“C ”,130~145分评为“B ”,145~160分评为“A ”.那么该年级1500名考生中,考试成绩评为“B ”的学生大约有_________名(3) 如果第一组只有一名是女生,第五组只有一名是男生,针对考试成绩情况,命题教师决定从第一组、第五组分别随机选出一名同学谈谈做题的感想,则所选两名学生刚好是一名女生和一名男生的概率是_________20.(本题8分)如图,双曲线xky =(k >0)与直线y =2x +4交于A (-3,m )、B 点. (1) 求k 的值及B 点坐标(2) P 点在直线AB 的下方,且在该双曲线上,S △ABP >S △ABO ,请结合图像直接写出满足条件的P 点的横坐标x 的范围21.(本题8分)如图,△ABO 中,AB =AO ,⊙O 与BA 相切于点C 、交BO 于点D ,作BE ∥AO(1) 求证:BE 是⊙O 的切线(2) 如图2,设BE 切⊙O 于点F ,连接AF .若5=DOBO,求tan ∠AFC 的值22.(本题10分)一条隧道的截面如图所示,它的上部是一个以AD 为直径的半圆O ,下部是一个矩形ABCD .矩形ABCD 相邻两边之和为8 m ,半圆O 的半径为x m (π取3)(1) 求隧道截面的面积S (m 2)关于半径x (m )的函数关系式(不需要写自变量的取值范围)AD (F )C(E )B B ADEGC F图2图1(2) 求S 的最大值,并求出此时x 的值(3) 若2m ≤CD ≤3m ,直接写出隧道截面的面积S 的最大值23.(本题10分)如图1,将菱形纸片AB (E )CD (F )沿对角线BD (EF )剪开,得到△ABD 和△ECF ,固定△ABD ,并把△ABD 和△ECF 叠放在一起,如图2,△ECF 的顶点F 在△ABD 的BD 边上滑动(F 点不与B 、D 重合),且CF 始终经过点A ,EF 、AD 交于点G (1) 求证:△ABF ∽△FDG (2) 若∠F AG =90°,tan ∠B =43,求FGEG(3) 若AB =5,tan ∠B =43,在△ECF 滑动的过程中.当△AFG 为等腰三角形时,直接写出BF 的长度为___________24.(本题12分)如图1.平面直角坐标系中,抛物线c bx x y ++-=221经过等腰直角三角形ABC的顶点A 、B .若AB //x 轴,∠ABC =90°,且A (0,-1),C (4,3) (1) 求该抛物线的解析式(2) 如图2,平移(1)中的抛物线,使其顶点P 在直线AC 上滑动,且与AC 交于另一点Q .设P 点的横坐标为m① 当∠QBP =45°时,求m 的值② 如图3,取BC 的中点M ,连PM 、BQ ,求四边形BMPQ 周长的最小值yxyx yxBABCA QPC BAQPC 图3图2图1MO O O。
2015-2016学年第二学期白云广雅九年级一模

2016年广州市中考英语模拟卷(白云广雅)一、语法选择Yao Ming was elected to the Naismith Memorial Basketball Hall of Fame Class of 20161 April 4th. The Naismith Memorial Basketball Hall of Fame said that Yao Ming,2 is from China,helped3 the NBA popular in China.“He led his hometown Shanghai Sharks 4 a CBA Championship in 2002 and5 the NBA in the same year. As a member of the Houston Rockets, he got all honors(2003) and was named to the All-NBA Team five times(2004,2006-2009). He was also6 eight-time NBA All-Star(2003-2009,2011). As a member of the Chinese National Team, Yao got the Asian Championship MVP three times. He is really a great7 .No one in Asia8 be better.” the speaker said.9 gets on well all the time. Yao Ming got hurt in the game in 2005. 10sometimes he had to stop, he kept playing 11 2011, when he had to retire from basketball because of his injured foot.“These ten inductees,including Yao Ming and12 nine players, have done a lot to the basketball game in13 own way and we are happy to honor them,” said Jerry, leader of the Naismith Memorial Basketball Hall of Fame.The Naismith Memorial Basketball Hall of Fame is an American history museum and hall of fame. It was14 up in 1959. Since then, it 15 345 people and 10 teams already.1.A. on B. at C. to D. in2.A. which B. who C. whose D. whom3.A. make B. made C. makes D. making4.A. of B. with C. about D. to5.A. joined B. joins C. joining D. join6.A. a B. an C. the D. 不填7.A. successful B. successfully C. succeed D. success8.A. must B. should C. can D. need9.A. Something B. Nothing C. Everything D. Anything10.A. Because B. Unless C. Though D. So11.A. and B. if C. until D. after12.A. the other B. another C. others D. other13.A. they B. them C. theirs D. their14.A. setting B. sets C. set D. to set15.A. has honored B.honored C. had honored D. honors二.完形填空Jimmy, a little mouse, looked out of the window of the farmhouse. Still nobody came. Maybe today,he thought 16 . It was only a few days before Christmas and he was watching for a miracle(奇迹).This farmhouse had been 17 too long. It needed a family. Jimmy’s 18made a noise. He realized that he hadn’t eaten anything since yesterday. He jumped from the windowsill(窗沿), took a 19 from his home, and went next door to Farmer Mike’s.Farmer Mike’s house had been a great place for the little mouse until the farmer married a wife who had a cat. Jimmy looked around carefully as he went into the room where grain was stored and was quite 20 as he filled his bag with wheat. He was about to leave when suddenly he21 a hot breath about his ear. His heart beat fast, and without thinking he started to run and luckily escaped the cat’s paws(爪子).The next afternoon Jimmy heard some good news: a 22 family would be moving into the farmhouse soon. Jimmy’s granny would arrive on Christmas Eve to23with him. Before long, a car came up the road leading to the house, with butter sandwiches,cheese and chocolate.Jimmy’s Christmas miracle did arrives!The house came alive the next few days. Jimmy 24 every single hour of them. However the day before Christmas when he was drinking hot chocolate with a satisfied smile at the door of his home, he heard the25 of the children of the family about what they might get for Christmas. What?A cat? The smile froze on his face; his mouth fell wide open. After a long while,he at last found his voice:“ H ey! Whose Christmas miracle is this?”16.A. carefully B.excitedly C. hopefully D. proudly17.A. dirty B. noisy C. awful D. empty18.A. mouth B. nose C. stomach D. throat19.A. bag B. stick C. bowl D. coat20.A. curious B. nervous C. tired D. silent21.A. took B. drew C. felt D. caught22.A. close B. happy C. new D. young23.A. celebrate B. communicate C. compete D. contact24.A. counted B. enjoyed C. missed D. wasted25.A. introduction B. discussion C. comment D. decision三.阅读理解AOn the first day of school our teacher introduced himself and challenged us to get to know someone we didn’t know. I stood up to look around when a gentle hand touched my shoulder.I turned around to find a little old lady with a warm smile. She said,”Hi, girl! My name is Rose. I’m eighty-seven years old. ”“Why are you in university at such a young age?” I asked. She replied,” I’m here to meet a rich husband, get married, have a couple of kids,and then retire and travel.”I knew she was joking. I was curious what might have encouraged her to be taking on this challenge at her age.“I always dreamed of having a university education and now I’m getting one!” She told me. We became friends. Every day we would talk nonstop after class. I always enjoyed listening to this “time machine”as she shared her wisdom and experience with me. And Rose easily made friends wherever she went.At the end of the term we invited Rose to make a little speech. She cleared her throat and began,”We do not stop playing because we are old; we grow old because we stop playing. I’ve learned a few secrets of staying young, being happy, and achieving success. You have to laugh and find humor every day. You’ve got to have a dream. When you lose your dream, you die.”“There is a huge difference between growing older and growing up. Anybody can grow older. That doesn’t take any talent or ability. The idea is to grow up by always finding the opportunity in change ...”26. When the author and Rose first met,they began their conversation in a manner.A.politeB. impoliteC. seriousD. humorous27. Rose went to the university in order to .A. meet a rich husbandB. make new friendsC. get a better jobD.get a university education28. The author considered Rose as a “time machine” because .A. she always came to class on timeB. she made friends easily at universityC. she enjoyed a long life and lots of wisdom and experienceD. she knew the difference between growing older and growing up29. The word “That” in Paragraph 7 refers to .A. growing olderB. growing upC. staying youngD. being happy30. From this passage we know Rose believed .A. “Easier said than done”B. “Well begun is half done”C. “It is never too late to learn”D. “reading makes a full man.”BQueen Elizabeth Ⅱis not only the queen of the United Kingdom, but she is also the queen of other 16 countries, including Australia, New Zealand, Canada and Jamaica. Her face is seen on stamps and coins all around the world.Elizabeth Alexandra Mary Windsor was born in London on April 21st 1926.Her parents were George, the Duke of York, and Elizabeth, the daughter of the Earl and Countness of Strathmore. As a child, Princess Elizabeth lived with her parents and younger sister in London and Windsor. Every summer, she traveled to Scotland to visit her mother's parents. She was interested in all kinds of sports, but her favorites were horse riding and swimming. She was also keen on acting, art and music.As princess Elizabeth grew older, she started to play a part in British public life. When she was 14, she broadcast a radio message to all the children of Britain and the Common-wealth. Twoyears later, she carried out her first public duty, and started to go on official tours shortly after that. After a tour to South Africa in 1946, she married Philip Mountbatten.The couple had four children: Prince Charles, born in 1948, Princess Anne, born in 1950, Prince Andrew, born in 1960 and Prince Edward, born in 1964.After her father died, Princess Elizabeth became Queen Elizabeth Ⅱ in a ceremony held in London in 1953. As a queen, she has many duties, and leads a very busy life.She travels around the world, meeting the leaders of other countries, and attends a large number of official duties. She also holds a meeting every week with the British Prime Minister.Every year, on Christmas Day, she broadcast a message to the people of British and the Common-wealth, talking about her hopes for the future.Queen Elizabeth has been on the queen for more than 40 years and has become one of the most famous women in the world.Lots of people in British believe that she tries hard to understand her people and be a good queen.More than her title, this quality has earned her much love and respect.31.What is Queen Elizabeth Ⅱ?A. She is the queen of 17 different countries.B. She is the queen of Australia and the USAC. She is the queen of 16 different countriesD. She is only queen of the United Kingdom32. As she grew older,Princess Elizabeth .A. broadcasted many radio messagesB. went on many tours to South AfricaC. started to take part in British public lifeD. stopped playing a part in British public life33. Who is the most possible to become King or Queen if Queen ElizabethⅡ dies?A. Prince AndrewB. Prince CharlesC. Princess AnneD. Prince Edward34. Which is the correct order of Queen Elizabeth’s life?① Her father died② She became Queen③ She married Phillip Mountbatten④ She broadeasted a radio message to all the children of Britain.⑤ She traveled to Scotland to visit her mother’s parents every summer.A. ⑤④③②①B. ④⑤③①②C. ⑤④③①②D. ④⑤③②①35. Which of the following is TRUE?A. Today, Queen Elizabeth seldom leaves the UK.B. Today, Queen Elizabeth does not lead a very busy life.C. Today, Queen Elizabeth is always busy carrying out her duties.D. Today, Queen Elizabeth talks about her hopes for the future every day.CMany animals recognize their food because they see it. So do humans. When you see an apple or a piece of chocolate you know that these are things you can eat. You can also use other senses when you choose your food. You may like it because it smells good or because it tastes good. You may dislike some types of food because they do not look, smell or taste very nice. Different animals use different senses to find and choose their food. A few animals depend on only one of their senses, while most animals use more than one sense.Although there are many different types of food, some animals spend their lives eating only one type. The giant panda eats only one particular type of bamboo. Other animals eat only one type of food even when given the choice. A kind of white butterfly will stay on the leaves of a cabbage, even though there are plenty of other vegetables in the garden. However, most animals have a more varied diet. The bear eats fruits and fish. The fox eats small animals, birds and fruits. The diet of these animals will be different depending on the season.Humans have a very varied diet. We often eat food because we like it and not because it is good for us. In countries such as France and Britain, people eat foods with too much sugar. This makes them overweight, which is bad for their health. Eating too much red meat and animal products, such as butter, can also be bad for the health. Choosing the right food, therefore, has become an area of study in modern life.36. We can infer from the text that humans and animals _________.A. depend on one sense in choosing foodB. are not satisfied with their foodC. choose food in similar waysD. eat entirely different food37.What does the underlined word “varied” mean?A.各种在B.丰富的C. 好吃的D.时令的38. Which of the following eats only one type of food?______.A. The small birdB. The bear.C. The white butterfly.D. The fox.39. What can we learn from the last paragraph?A. some people have few choices of food.B. some people care little about healthy dietC. French and British food is goodD. food is chosen for a good reason.40.What is the best title of this passage?A. Like animals, like humansB. The more to choose, the more to eatC. Good choice healthy dietD. Good taste, good for healthD第二节阅读填空(共5小题,每小题1分,共5分)Americans buy more bottled water than any other nation in the world. 29 billion bottles of water are drunk each year. It takes 17 million barrels of crude oil to make these bottles.46)___________So why don't more people drink water from the tap(水龙头)in the kitchen?47)_________But that's not true. In the United States, the government makes sure water from the tap is safe.48)____________ But maybe if they understand the problems it makes, they will try drinking from a glass at home or carrying water in a reusable bottle instead of a plastic one. Although plastic water bottles can be turned into some other useful things, only a small number of them are reused.49)_________ they end up as rubbish on the land and in rivers, lakes, and the ocean. Plastic bottles take hundreds of years to break down.Water is good for you, so keep drinking it.50)___________. If you take one to school, don't throwit away一bring it home and put tap water in it for the next day.A. Some people drink bottled water because they think it is better for them than water out of the tapB. But think about how often you use plastic water bottles, and see if you can make a change.C.That's enough oil to keep a million cars going for twelve months.D. The rest are taken away in rubbish trucks, or even worse.E.People love bottled water because it is convenientto take with them四.写作(共三节,满分35分)第一节单词拼写(共6小题,每小题1分,共6分)根据下列句子及所给首字母写出所缺单词,在填写答案时要求写出完整单词,每空只写一词。
武汉二中广雅中学2016届九年级下第二次月考试卷含答案解析

2015-2016学年湖北省武汉二中广雅中学九年级(下)第二次月考数学试卷一、选择题(共10小题,每小题3分,共30分)1.与最接近的整数是()A.0 B.2 C.4 D.52.若分式有意义,则x的取值范围是()A.x<1 B.x≠1 C.x>1 D.全体实数3.下列运算正确的是()A.(﹣a)(﹣a)3=﹣a4 B.(2a3)3=6a9C.(3a﹣2)(2+3a)=9a2﹣4 D.(a﹣b)2=a2﹣b24.下列事件是必然事件的是()A.四边形的内角和为180°B.内错角相等C.对顶角相等D.矩形的对角线平分一组对角5.如图,将一个边长为a cm的正方形纸片剪去一个边长为(a﹣1)cm的小正方形(a>1),余下的部分沿虚线剪开拼成一个矩形(无重叠无缝隙),则矩形的面积是()A.1 B.a C.2a﹣1 D.2a+16.在如图4×4的正方形网格中,△MNP绕某点旋转一定的角度,得到△M1N1P1,则其旋转中心可能是()A.点A B.点B C.点C D.点D7.一个四棱柱的俯视图如图所示,则这个四棱柱的主视图和左视图可能是()A. B. C.D.8.如图,是根据九年级某班50名同学一周的锻炼情况绘制的条形统计图,下面关于该班50名同学一周锻炼时间的说法正确的是()A.极差是15B.中位数是6.5C.众数是20D.平均每日锻炼超过1小时的人占总数的一半9.材料1:从三张不同卡片中选出两张后排成一列,有6种不同的排列:抽象成数学问题就是:从3个不同的元素中任取2个元素的排列,其排列数记为:A32=3×2=6,一般地A n m=n(n﹣1)(n﹣2)…(n﹣m+1)(m、n为正整数,且m≤n)材料2:从三张不同卡片中选取两张,有3种不同的选法:抽象成数学问题就是:从3个不同的元素中选取2个元素的组合,其组合数为C32==3,一般地C n m=(m、n为正整数,且m≤n)由以上材料,你可以知道:从7个人中选取4人,排成一列,共有()种不同的排法.A.35 B.350 C.840 D.252010.如图,已知⊙O的半径为R,C、D在直径AB的同侧半圆上,∠AOC=96°,∠BOD=36°,动点P在直径AB上,则CP+PD的最小值是()A.2R B.R C.R D.R二、填空题(本大题共6个小题,每小题3分,共18分)11.计算:2﹣|﹣3|=.12.去年武汉大学樱花盛开时节,10万游客涌入,3天门票收入近60万元,60万用科学记数法表示为.13.如图所示:从甲地去乙地有A1、A2、A3三条线路,从乙地去丙地有B1、B2二条线段,你任意选一条从甲地到丙地的线路,恰好经过B1线路的概率是(不考虑线路的长短).14.如图,直线l1∥l2,AB⊥l1,垂足为O,BC与l2相交于点E,若∠1=43°,则∠2=度.15.如图所示,△ABC中,∠BAC=60°,∠BAC的平分线交BC于D.若AB=8,AC=6,则AD的长是.16.如图所示,已知直线l:y=2kx+2﹣4k(k为实数),直线l与x轴正半轴、y轴的正半轴交于A、B两点,则△AOB面积的最小值是.三、解答题(共8题,共72分)17.解方程:.18.已知:如图,点D在AB上,点E在AC上,BE和CD相交于点O,AB=AC,∠B=∠C.求证:BD=CE.19.A、B、C三名同学竞选学生会主席,他们的笔试和口试成绩(单位:分)分别用两种方式进行了统计,如表和图:(1)请将表和图中的空缺部分补充完整;(2)竞选的最后一个程序是由本系的300名学生进行投票,三位候选人的得票情况如图(没有弃权票,每名学生只能推荐一个),请计算每人的得票数;(3)若每票计1分,学校将笔试、口试、得票三项测试得分按4:3:3的比例确定个人成绩,请计算三位候选人的最后成绩,并根据成绩判断谁能当选.20.已知反比例函数y1=与一次函数y2=mx+n的图象都经过A(1,﹣3),且当x=﹣3时,两个函数的函数值相等(1)求m、n的值;(2)结合函数图象,写出当y1>y2时,自变量x的取值范围.21.已知:如图,在Rt△ABC中,∠C=90°,⊙O与△ABC的三边分别切于点D,E,F.(1)连接AO、BO,求∠AOB的度数;(2)连接BD,若tan∠DBC=,求tan∠ABD的值.22.某商品现在的售价为每件60元,进价为每件40元,每星期可卖出300件;市场调查反映,如调整价格,每涨价1元,每星期要少卖出10件;每降价1元,每星期可多卖出20件.(1)若调整后的售价为x元(x为正整数),每星期销售的数量为y件,求y与x的函数关系;(2)设每星期的利润为W元,问如何确定销售价格才能达到最大周利润;(3)为了使每周利润不少于6000元,求售价的范围.23.△ABC是边长为6的等边三角形,D、E是AB、BC上的动点,且BE=DC,连AD、EC交于点M.(1)求证:△AME∽△ABD;(2)连DE,若BD=2DC,求证:①DE⊥AB;②连BM,求BM的长;(3)当D、E在△ABC的边BC、AB上运动时,直接写出△AMC的面积的最大值.24.已知如图,抛物线y=x2+bx+c经过点A(﹣1,0)、B(3,0).(1)求b、c的值;(2)如图,点D与点C关于点O对称,过点B的直线交y轴于点N,交抛物线于另一点M.若∠DBM=∠ACO,求的值;(3)如图,在(2)的条件下,点P是y轴上一点,连PM、PB分别交抛物线于点E、F,探究EF与MB的位置关系,并说明理由.2015-2016学年湖北省武汉二中广雅中学九年级(下)第二次月考数学试卷参考答案与试题解析一、选择题(共10小题,每小题3分,共30分)1.与最接近的整数是()A.0 B.2 C.4 D.5【考点】估算无理数的大小.【分析】先估计的近似值,然后判断与最接近的整数即可求解.【解答】解:∵1<3<4,∴1<<2.故选B2.若分式有意义,则x的取值范围是()A.x<1 B.x≠1 C.x>1 D.全体实数【考点】分式有意义的条件.【分析】分式有意义时,分母不等于零,据此解答.【解答】解:依题意得:1﹣x≠0,解得x≠1.故选:B.3.下列运算正确的是()A.(﹣a)(﹣a)3=﹣a4 B.(2a3)3=6a9C.(3a﹣2)(2+3a)=9a2﹣4 D.(a﹣b)2=a2﹣b2【考点】整式的混合运算.【分析】原式各项计算得到结果,即可作出判断.【解答】解:A、原式=(﹣a)4=a4,错误;B、原式=8a9,错误;C、原式=9a2﹣4,正确;D、原式=a2﹣2ab+b2,错误,故选C4.下列事件是必然事件的是()A.四边形的内角和为180°B.内错角相等C.对顶角相等D.矩形的对角线平分一组对角【考点】随机事件.【分析】根据事件发生的可能性大小判断相应事件的类型即可.【解答】解:四边形的内角和为180°是不可能事件;内错角相等是随机事件;对顶角相等是必然事件;矩形的对角线平分一组对角是随机事件,故选:C.5.如图,将一个边长为a cm的正方形纸片剪去一个边长为(a﹣1)cm的小正方形(a>1),余下的部分沿虚线剪开拼成一个矩形(无重叠无缝隙),则矩形的面积是()A.1 B.a C.2a﹣1 D.2a+1【考点】完全平方公式的几何背景.【分析】根据大正方形面积减去小正方形面积求出所求矩形面积即可.【解答】解:根据题意得:a2﹣(a﹣1)2=a2﹣a2+2a﹣1=2a﹣1,故选C6.在如图4×4的正方形网格中,△MNP绕某点旋转一定的角度,得到△M1N1P1,则其旋转中心可能是()A.点A B.点B C.点C D.点D【考点】旋转的性质.【分析】连接PP1、NN1、MM1,分别作PP1、NN1、MM1的垂直平分线,看看三线都过哪个点,那个点就是旋转中心.【解答】解:∵△MNP绕某点旋转一定的角度,得到△M1N1P1,∴连接PP1、NN1、MM1,作PP1的垂直平分线过B、D、C,作NN1的垂直平分线过B、A,作MM1的垂直平分线过B,∴三条线段的垂直平分线正好都过B,即旋转中心是B.故选B.7.一个四棱柱的俯视图如图所示,则这个四棱柱的主视图和左视图可能是()A. B. C.D.【考点】由三视图判断几何体;简单几何体的三视图.【分析】由俯视图想象几何体的前面、左侧面的形状即可得.【解答】解:由该四棱柱的俯视图可知其主视图为一个矩形,左视图是一个矩形内部加两条纵向的虚线,故选:B.8.如图,是根据九年级某班50名同学一周的锻炼情况绘制的条形统计图,下面关于该班50名同学一周锻炼时间的说法正确的是()A.极差是15B.中位数是6.5C.众数是20D.平均每日锻炼超过1小时的人占总数的一半【考点】条形统计图;中位数;众数;极差.【分析】根据中位数、众数和极差的概念分别求得这组数据的中位数、众数和极差,由图可知锻炼时间超过7小时的有5人.即可判断四个选项的正确与否.【解答】解:A、这组数据的最大数是8,最小数是5,则其极差为3,故此选项错误;B、由条形图可知该组数据共7+18+20+5=50个数,其中位数为=6.5,故此选项正确;C、这组数据中出现次数最多的是7,则其众数的为7,故此选项错误;D、平均每日锻炼超过1小时即每周锻炼超过7小时的人数为5,占总人数的,故此选项错误;故选:B.9.材料1:从三张不同卡片中选出两张后排成一列,有6种不同的排列:抽象成数学问题就是:从3个不同的元素中任取2个元素的排列,其排列数记为:A32=3×2=6,一般地A n m=n(n﹣1)(n﹣2)…(n﹣m+1)(m、n为正整数,且m≤n)材料2:从三张不同卡片中选取两张,有3种不同的选法:抽象成数学问题就是:从3个不同的元素中选取2个元素的组合,其组合数为C32==3,一般地C n m=(m、n为正整数,且m≤n)由以上材料,你可以知道:从7个人中选取4人,排成一列,共有()种不同的排法.A.35 B.350 C.840 D.2520【考点】有理数的混合运算.【分析】根据题中阅读材料中的方法求出不同的排法即可.【解答】解:根据题意得:==35,故选A.10.如图,已知⊙O的半径为R,C、D在直径AB的同侧半圆上,∠AOC=96°,∠BOD=36°,动点P在直径AB上,则CP+PD的最小值是()A.2R B.R C.R D.R【考点】轴对称﹣最短路线问题.【分析】首先要确定点P的位置,作点C关于AB的对称点C′,连接C′D,交圆于点P,则点P即为所求作的点.且此时PC+PD的最小值为C′D.【解答】解:作点C关于AB的对称点C′,连接DC′,根据题意以及垂径定理,得弧C′D的度数是120°,则∠C′OD=120度.作OE⊥C′D于E,则∠DOE=60°,则DE=R,C′D=R.故选B.二、填空题(本大题共6个小题,每小题3分,共18分)11.计算:2﹣|﹣3|=﹣1.【考点】有理数的减法;绝对值.【分析】原式利用绝对值的代数意义变形,计算即可得到结果.【解答】解:原式=2﹣3=﹣1,故答案为:﹣112.去年武汉大学樱花盛开时节,10万游客涌入,3天门票收入近60万元,60万用科学记数法表示为6×105.【考点】科学记数法—表示较大的数.【分析】科学记数法的表示形式为a×10n的形式,其中1≤|a|<10,n为整数.确定n的值时,要看把原数变成a时,小数点移动了多少位,n的绝对值与小数点移动的位数相同.当原数绝对值>1时,n是正数;当原数的绝对值<1时,n 是负数.【解答】解:将60万用科学记数法表示为:6×105.故答案为:6×105.13.如图所示:从甲地去乙地有A1、A2、A3三条线路,从乙地去丙地有B1、B2二条线段,你任意选一条从甲地到丙地的线路,恰好经过B1线路的概率是(不考虑线路的长短).【考点】列表法与树状图法.【分析】根据题意可以画出相应的树状图,从而可以求得恰好经过B1线路的概率.【解答】解:由题意可得,∴恰好经过B1线路的概率是:,故答案为:.14.如图,直线l1∥l2,AB⊥l1,垂足为O,BC与l2相交于点E,若∠1=43°,则∠2=133度.【考点】平行线的性质.【分析】两直线平行,同位角、内错角相等,据此即可解答.【解答】解:过点B作BD∥l1,则BD∥l2,∴∠ABD=∠AOF=90°,∠1=∠EBD=43°,∴∠2=∠ABD+∠EBD=133°.故答案为:133.15.如图所示,△ABC中,∠BAC=60°,∠BAC的平分线交BC于D.若AB=8,AC=6,则AD的长是.【考点】等边三角形的性质;解分式方程;平行线的性质;解直角三角形.【分析】过点C作CM⊥AD于点M,延长CM交AB于点E,过点E作EF∥AD 交BC于点F,则△ACE为等边三角形,根据等边三角形的性质即可得出AM、BE的长度,设DM=x,则EF=2x,再根据平行线的性质即可得出,代入数据解分式方程即可得出x值,将其代入AD=AM+DM中即可求出AD的长度.【解答】解:过点C作CM⊥AD于点M,延长CM交AB于点E,过点E作EF∥AD交BC于点F,如图所示.∵∠BAC=60°,∠BAC的平分线交BC于D,AB=8,AC=6,∴△ACE为等边三角形,BE=AB﹣AC=2,∴AM=AC=3.设DM=x,则EF=2x,∵EF∥AD,∴,即,解得:x=,经检验,x=是原方程的解,∴AD=AM +DM=.故答案为:.16.如图所示,已知直线l :y=2kx +2﹣4k (k 为实数),直线l 与x 轴正半轴、y 轴的正半轴交于A 、B 两点,则△AOB 面积的最小值是 8 .【考点】一次函数的性质.【分析】可用k 分别表示出A 、B 两点的坐标,则可得到OA 、OB 的长,可用k 表示出△AOB 的面积,再利用基本不等式可求得答案. 【解答】解: 在y=2kx +2﹣4k 中,令y=0可得,0=2kx +2﹣4k ,解得x=,令x=0可得,y=2﹣4k ,∴A (,0),B (0,2﹣4k ),∴OA=,OB=2﹣4k ,∴S △AOB =OA•OB=××(2﹣4k )=﹣=﹣=﹣4k ﹣+4,∵k <0,∴﹣4k >0,﹣>0,且﹣4k ×(﹣)=4,∴﹣4k﹣≥2=4,≥8,∴﹣4k﹣+4≥8,即S△AOB即△AOB面积的最小值是8,故答案为:8.三、解答题(共8题,共72分)17.解方程:.【考点】解一元一次方程.【分析】首先熟悉解一元一次方程的步骤:去分母,去括号,移项,合并同类项,系数化为1.【解答】解:去分母得:3(3x﹣1)﹣12=2(5x﹣7)去括号得:9x﹣3﹣12=10x﹣14移项得:9x﹣10x=﹣14+15合并得:﹣x=1系数化为1得:x=﹣1.18.已知:如图,点D在AB上,点E在AC上,BE和CD相交于点O,AB=AC,∠B=∠C.求证:BD=CE.【考点】全等三角形的判定与性质.【分析】由两角和夹边即可得出△ABE≌△ACD,由全等三角形的性质可到AE=AD,进而可得出结论BD=CE.【解答】证明:在△ABE和△ACD中,,∴△ABE≌△ACD(ASA),∴AE=AD,∵BD=AB﹣AD,CE=AC﹣AE,∴BD=CE.19.A、B、C三名同学竞选学生会主席,他们的笔试和口试成绩(单位:分)分别用两种方式进行了统计,如表和图:(1)请将表和图中的空缺部分补充完整;(2)竞选的最后一个程序是由本系的300名学生进行投票,三位候选人的得票情况如图(没有弃权票,每名学生只能推荐一个),请计算每人的得票数;(3)若每票计1分,学校将笔试、口试、得票三项测试得分按4:3:3的比例确定个人成绩,请计算三位候选人的最后成绩,并根据成绩判断谁能当选.【考点】加权平均数.【分析】(1)根据条形统计图找出A的口试成绩,填写表格即可;找出C的笔试成绩,补全条形统计图即可;(2)由300分别乘以扇形统计图中各学生的百分数即可得到各自的得分,再根据加权平均数的计算方法计算可得.(2)A的得票为300×35%=105(张),B的得票为300×40%=120(张),C的得票为:300×25%=75(张);(3)分别通过加权平均数的计算方法计算A的成绩,B的成绩,C的成绩,综合三人的得分,则B应当选.【解答】解:(1)由条形统计图得:A同学的口试成绩为90;补充直方图,如图所示:(2)三名同学得票情况是,A:300×35%=105;B:300×40%=120;C:300×25%=75,(3)∵==93,==96.5,==83.5,∵>>,∴B学生能当选.20.已知反比例函数y1=与一次函数y2=mx+n的图象都经过A(1,﹣3),且当x=﹣3时,两个函数的函数值相等(1)求m、n的值;(2)结合函数图象,写出当y1>y2时,自变量x的取值范围.【考点】反比例函数与一次函数的交点问题.【分析】(1)将点A(1,﹣3)代入y1=求出k,再将A(1,﹣3),B(﹣3,1)代入y2=mx+n即可解决问题.(2)根据函数图象当y1>y2时,反比例函数的图象在直线的图象上方,写出自变量的取值范围即可.【解答】解:(1)∵反比例函数y1=的图象都经过A(1,﹣3),∴k=﹣3,∴y1=﹣,又∵当x=﹣3时,两个函数的函数值相等∴经过点B(﹣3,1),∵一次函数y2=mx+n的图象都经过A(1,﹣3),B(﹣3,1),∴解得.(2)由图象可知当y1>y2时,﹣3<x<0或x>1.21.已知:如图,在Rt△ABC中,∠C=90°,⊙O与△ABC的三边分别切于点D,E,F.(1)连接AO、BO,求∠AOB的度数;(2)连接BD,若tan∠DBC=,求tan∠ABD的值.【考点】三角形的内切圆与内心.【分析】(1)如图1,连接DO、EO、FO,利用切线的定义和性质可得∠DOE=90°,AF=AD,BF=BE,易得△ADO≌△AFO,由全等三角形的性质可得∠AOF=∠AOD,∠BOF=∠BOE,易得;(2)过点D作DM⊥AB于点M,如图2,由tan∠DBC=,可知,设DC=1,则BC=4,可得CE=CD=1,BF=BE=3,设AD=AF=x,易得AC、AB,由勾股定理可得x,由△ADM∽△ABC,利用相似三角形的性质可得,易得AM,DM,BM,由tan∠ADB=可得结果.【解答】解:(1)如图1,连接DO、EO、FO,∵AC、BC、AB均为⊙O的切线,∴AF=AD,BF=BE,CE=CD,∠∠ODC=90°,∠OEC=90°,∵∠C=90°,∴∠DOE=90°,在△ADO与△AFO中,,∴△ADO≌△AFO,∴∠AOF=∠AOD,同理可得,∠BOF=∠BOE,∴=135°;(2)过点D作DM⊥AB于点M,如图2,∵tan,∴设DC=1,则BC=4,∴CE=CD=1,BF=BE=3,设AD=AF=x,则AC=1+x,AB=3+x,在Rt△ABC中,(x+1)2+42=(x+3)2,解得:x=2,∵△ADM∽△ABC,∴,∴,∴AM=,DM=,∴=,∴tan∠ABD==.22.某商品现在的售价为每件60元,进价为每件40元,每星期可卖出300件;市场调查反映,如调整价格,每涨价1元,每星期要少卖出10件;每降价1元,每星期可多卖出20件.(1)若调整后的售价为x元(x为正整数),每星期销售的数量为y件,求y与x的函数关系;(2)设每星期的利润为W元,问如何确定销售价格才能达到最大周利润;(3)为了使每周利润不少于6000元,求售价的范围.【考点】二次函数的应用;一元二次方程的应用.【分析】(1)根据“每涨价1元,每个星期要少卖出10件;每降价1元,每个星期可多卖出20件”列出y与x的函数关系.(2)设每星期所获利润为W,根据一星期利润等于每件的利润×销售量得到W 与x的关系式;把解析式配成抛物线的顶点式,利用抛物线的最值问题即可得到答案;(3)分别根据60≤x≤90、40≤x≤60两种情况,求出每周利润不少于6000元时x的范围即可得.【解答】解:(1)根据题意得:涨价时,y=300﹣10(x﹣60)(60≤x≤90),降价时,y=300+20(60﹣x)(40≤x≤60),整理得:y=;(2)当涨价时,W=(x﹣40)(﹣10x+900)=﹣10(x﹣65)2+6250(60≤x≤90),当x=65时,y的最大值是6250,当降价时,W=(60﹣x)(﹣20x+1500)=﹣20(x﹣57.5)2+6125 (40≤x≤60),所以定价为:x=57.5(元)时利润最大,最大值为6125元.综合以上两种情况,定价为65元时可获得最大利润为6250元;(3)当60≤x≤90时,﹣10(x﹣65)2+6250=6000,解得:x=60或x=70,∴60≤x≤70;当40≤x≤60时,﹣20(x﹣57.5)2+6125=6000,解得:x=55或x=60,∴55≤x≤60,综上,为了使每周利润不少于6000元,售价x的范围是55≤x≤70.23.△ABC是边长为6的等边三角形,D、E是AB、BC上的动点,且BE=DC,连AD、EC交于点M.(1)求证:△AME∽△ABD;(2)连DE,若BD=2DC,求证:①DE⊥AB;②连BM,求BM的长;(3)当D、E在△ABC的边BC、AB上运动时,直接写出△AMC的面积的最大值.【考点】相似形综合题.【分析】(1)根据等边三角形性质得出AB=BC,∠ABD=∠C=60°,可得△ABD≌△BCE;推出∠BAD=∠CBE,再通过三角形外角性质即可求出∠AME的度数,即可得出结论.(2)①过点C作CF⊥AB于F,判断出△BDE∽△BCF,即可得出结论,②先利用勾股定理求出AD,AM,再用相似得出比例式求出MN,AN最后用勾股定理即可得出BM.(3)先判断出△ACM面积最大时,点M的位置,最后用圆的性质即可求出结论.【解答】解::①∵△ABC为等边三角形,∴AB=BC,∠ABD=∠C=60°,在△ABD和△BCE中,∴△ABD≌△BCE(SAS),∴AD=BE.∠BAD=∠CBE,∴∠AME=∠ABE+∠BAD=∠ABE+∠CBE=∠ABC=60°=∠B∵∠EAM=∠DAB,∴△AME∽△ABD,(2)如图1,过点C作CF⊥AB,∴∠BFC=90°∵△ABC是边长为6的等边三角形,∴AB=BC=6,BF=AB=3,∵BD=2DC,∴CD=2,BD=4∴BE=CD=2,∵,,∴,∵∠B=∠B,∴△BDE∽△BCF,∴∠BED=∠BFC=90°,∴DE⊥AB,如图2,过点A作AH⊥BC,∴BH=BC=3,∴DH=BD﹣BH=1,AH=3,根据勾股定理得,AD==2,由(1)知,△AME∽△ABD,∴,∴,∴AM=在Rt△BDE中,DE==2,过点M作MN⊥AB,∵DE⊥AB,∴DE∥MN,∴=∴,∴MN=,AN=∴BN=AB﹣AN=在Rt△BMN中,BM==.(3)如图3,由(1)可知∠AME=∠B=60°,∴∠AMC=120°,点M的轨迹是一段弧,它所对的弦AC对的圆心角120°,∴△AMC的AC边上的高为M到AC的距离,最大距离即为弓形的高IG,在Rt△AOI中,AI=3,∠AOI=∠AOC=60°,∴OA=2,OI=,∴IG=,=×AC×IG=×6×=3.∴S△AMC最大24.已知如图,抛物线y=x2+bx+c经过点A(﹣1,0)、B(3,0).(1)求b、c的值;(2)如图,点D与点C关于点O对称,过点B的直线交y轴于点N,交抛物线于另一点M.若∠DBM=∠ACO,求的值;(3)如图,在(2)的条件下,点P是y轴上一点,连PM、PB分别交抛物线于点E、F,探究EF与MB的位置关系,并说明理由.【考点】二次函数综合题.【分析】(1)利用待定系数法即可解决问题.(2)取点Q(1,4),P(0,1),如图1中,作QR⊥y轴于R,连接PQ,则RQ=OP=1,PR=OC=OB=3,由△POR≌△BPO≌△CAO,推出BQ与y轴的交点是N,与抛物线的交点是M,利用方程组即可解决问题.(3)结论:EF∥BM或EF与BM重合.设P(0,m),求出直线PM、PB,再利用方程组求出点E、F坐标,求出直线EF的解析式即可解决问题.【解答】解:(1)∵抛物线y=x2+bx+c经过点A(﹣1,0)、B(3,0),∴有方程组,解得,∴b=﹣2,c=﹣3.(2)∵抛物线解析式为y=x2﹣2x﹣3,∴点C坐标(0,﹣3),OA=1,OB=3,OC=3,∵点D与点C关于点O对称∴△BOD是等腰直角三角形,∴∠2+∠4=45°,取点Q(1,4),P(0,1),如图1中,作QR⊥y轴于R,连接PQ,则RQ=OP=1,PR=OC=OB=3,∴△POR≌△BPO≌△CAO,∴∠1=∠2=∠α,PQ=PB,∵∠6+∠2=90°,∴∠1+∠6=90°,∴∠5=90°,∵PQ=PB,∴∠3+∠4=45°,∵∠2+∠4=45°,∴∠DBQ=∠3=∠2=∠α=∠ACO,∴由此BQ与y轴的交点是N,与抛物线的交点是M,∵B(3,0),Q(1,4),设直线BQ为y=kx+n,则,解得,∴直线BN的解析式为y=﹣2x+6,∴N(0,6),由解得或,∵B(3,0),∴M(﹣3,12),作MG⊥y轴于G,∵N(0,6),M(﹣3,12),B(3,0),∴MG=OB=3,NO=NG=6,∴Rt△MNG≌△Rt△BNO,∴MN=NB∴=1.(3)结论:EF∥BM或EF与BM重合.理由:设P(0,m),∵M(﹣3,12),B(3,0),∴可得直线PM的解析式为y=x+m,直线PB的解析式为y=﹣x+m,由消去y得3x2+(6﹣m)x﹣3(m+3)=0,[3x﹣(m+3)](x+3)=0,∴x=﹣3或,x=﹣3时,y=12,x=时,y=,∴方程组的解为或,∴E(,),由解得或,∴F(﹣,),设直线EF解析式为y=ax+t,则,∴=﹣,∴a=﹣2,∴直线EF的解析式为y=﹣2x+t,∵直线BM的解析式为y=﹣2x+6,∴t≠6时,EF∥MB,t=6时,直线EF与BM重合.2017年4月18日。
16年广州二中中考一模试卷

广州市第二中学2015学年第二学期一模初三年级英语科目试卷(满分110分)一、语法选择(共15小题,每题1分,共15分)Have you ever felt uncomfortable? Many of __1___ feel uneasy when someone stands too close __2__ us, talks to us too __3__ or makes eye contact with us for too long. But have you ever wondered why those things make you uncomfortable?It’s all about personal peace, which means not only __4__ imaginary space around the body, but also the space around all the ___5___. People feel that their space is being violated(侵犯) when they meet with an unwelcome sound, smell or look. This is probably why a man on a crowded bus shouting into his mobile phone or a woman next to you putting on strong perfume(香水) makes you feel __6___.___7___ people have had a stronger wish to protect their personal space or not in recent times is hard to say. Yet studies of airlines show that people have a strong desire(渴望) to have space to ___8___. In a survey by TripAdvisor, a travel website, people said that if they ___9___ pay more for some extra service, they would rather have larger seats than extra food.Although people may need their personal space, some hardly realize it. For example, people on a bus who hold newspapers __10__their faces to read in fact keep a distance from strangers.Go and watch a library table. You will notice __11__ one of the corner seats will usually __12__ first, because they are the farthest way. What if someone sits __13__ you? Maybe you will pile up books as if to make a wall.Preference(偏好) for personal space are different from culture to culture. Scientists have found that Americans generally prefer more personal space than people from __14__ cultures. In Latin(拉丁人的) cultures, __15__, people are more comfortable standing near each other.1. A. we B. us C. our D. ours2. A. with B. in C. to D. at3. A. loudness B. louder C. loudly D. loudest4. A. a B. an C. the D. /5. A. sense B. senses C. sensing D. sensings6. A. anger B. angry C. angers D. angrily7. A. Whether B. What C. That D. Which8. A. them B. their C. themselves D. they9. A. has to B. have to C. had to D. having to10. A. in the front B. in front C. in the front of D. in front of11. A. that B. what C. where D. if12. A. be taken B. be taking C. take D. takes13. A. opposite with B. opposite to C. opposite at D. opposite for14. A. another B. others C. other D. the others15. A. but B. however C. either D. although二.完形填空(共10小题,每题1.5分,共15分)The first time I remember noticing the crossing guard was when he waved to me as I drove my son to school. He __16__ me with a puzzle—all because he waved to me like someone does on seeing a close friend. There was a big, __17__ smile on his face. For the next few days I tried to __18__ his face to see if I knew him. I didn’t. Perhaps he had __19__ me for someone else. By the time I was quite sure that he and I were strangers, we were greeting each other warmly every morning like old friends.Then one day I found out the truth. As I drove near to the school he was standing in the middle of the road __20__ his stop sign, I was in line behind four cars. After the kids had reached the safety of the sidewalk, he lowered his sign and let the cars through. To the first car he waved and smiled in just the same way he had done to me over the last few days. The kids already had the window down and were happily waving their reply. The second car got the same __21__ from the crossing guard, and the driver, a businessman, gave a short wave back. Each of the following car of kids on their way to school responded heartily.Every morning I continued to watch the man with __22__. So far I haven’t seen anyone __23__ to wave back. I find it interesting that one person can make such a(n) __24__ to so many people’s lives by doing one simple thing like waving and smiling warmly. His cheerfulness armed the start of my day. With a friendly wave and smiling face he had changed the __25__ of the whole neighborhood.16. A. hit B. disagreed C. presented D. bored17. A. shy B. false C. funny D. bright18. A. research B. study C. realize D. explain19. A. praised B. respected C. mistaken D. remembered20. A. holding out B. handing in C. putting on D. setting up21. A. idea B. reply C. notice D. greeting22. A. surprise B. interest C. doubt D. hope23. A. fail B. try C. wish D. manage24. A. offer B. promise C. mess D. difference25. A. habits B. expresion C. rules D. feelings三.阅读理解(共20小题,每题2分,共40分)AOne August afternoon, Richard Allen dropped off his last passenger, Mrs. Carey, lifting two grocery bags, he followed her across the yard and stood on the step of her house. Glancing up, he saw a large wasp nest under the roof. Allen had heard that wasps can became more likely to sting in summer. He mentioned this to Mrs. Carey, who had opened the door.“Oh, they don’t bother me,” she said lightly. “I go in and out all the time.”Anxiously, Allen looked at the nest again—to see the wasps flying straight at him. “Hurry!” he shouted to Mrs. Carey. “Get in!”She stepped quickly inside. Allen ran for his mini-bus. Too late; they were upon him. Just as he jumped aboard, half a dozen red spots showed on his arm, and he felt more on his back and shoulders.As he was driving down the road, Allen felt as if something was burning at the back, and the “fire” was spreading forward toward his face. And immediate anxiety took hold of him. Allen knew that stings could cause some persons to die. But he had been stung the previous summer and the after-effects soon passed. However, what he didn’t know was that the first sting had turned his body into a time bomb waiting for the next to set off an explosion.Miles from the nearest medical assistance, Allen began to feel his tongue thick and heavy and his heartbeat louder. Most frightening, he felt his breathing more and more difficult. He reached for the radio mike, trying to call the mini-bus centre, but his words were hardly understandable. Signals were also poor that far out. He knew a rescue team was on 24-hour duty at the Amherst Fire Department’s north station. So his best chance was to make a run for it.Rushing down the mountain, Allen tried not to panic, focusing his mind on each sharp turn. He was almost through the last of them when he felt sure he was going into shock. Just then he reached for the radio mike again.“Call fire station,” he shouted concentrating to form the words. “Emergency. Bee stin g. Emergency. There in ten minutes.”“Five-ten,” the center replied.Hold on, Allen thought. Keep your eyes open. Breathe. Keep awake.At last he reached the station. Two firemen ran out. Allen felt their hands grasp him before he hit the ground. You made it, he thought.26. It is mentioned in the passage that wasps are more likely to attack when_______.A. there are huge noisesB. strangers are getting very nearC. the air is filled with food smellD. the hottest season comes around27. Allen didn't know that if stung by wasps again, he would___________.A. have no after-effectsB. suffer from sharper painC. lose his lifeD. became much weaker28. Allen failed at the first time when he tried to send his message to the mini-bus centerbecause__________.A. he was unable to speak clearlyB. his radio equipment was poorC. he was in a state of shockD. no one was on duty29. Which of the following is NOT true according the story?A. Allen drove to the fire station because he knew there was a rescue team there.B. Allen managed to make his request of help clear though he had difficulty talking by then.C. The mini-bus centre did help in that they got the rescue team ready before Allen arrived.D. Allen shouldn’t have looked at the wasps when he helped Mrs. Carey.30. Which would be the best title for the passage?A. Allen, a Helpless DriverB. Wasps, Bloody KillersC. A Race against DeathD. War against WaspsB"The world's oceans are slowly getting more acidic,” say scientists. The researchers from California report that the change is taking place in response to higher levels of carbon dioxide in the atmosphere.The lowering of the waters’ PH value is not great at the moment but could cause a serious threat to current ocean life if it continues, they warn. Ken Caldeira and Michael Wickett, from the Lawrence Livermore National Laboratory, report their concerns in the journal Nature.Increasing use of oil fuels means more carbon dioxide is going into the air, and most of it will eventually be absorbed by sea water. Once in the water, it reacts to form carbonic acid. Scientists believe that the oceans have already become slightly more acidic over the last century.These researchers have tried to predict what will happen in the future by combining what we know about the history of the oceans with computer models of climate change."This level of acidity will get much more extreme in the future if we continue releasing CO2 into the atmosphere," said DrCaldeira. "And we predict the amount of future acidity will exceed anything we have seen over the last several hundred million years, let alone perhaps after rare disasters such as asteroid impacts.”However, it is not absolutely clear what that means for ocean life.Most organisms live near the surface, where the greatest PH change would be expected to occur, but deep-ocean life forms may be moresensitive to PH changes.Coral reefs(珊瑚礁) and other organisms whose shells contain calcium carbonate may be particularly affected if the water's acidity levels keep going up, the team predict. They could find it much more difficult to build these structures in water with a lower PH.In recent years some people have suggested storing carbon dioxide from power stations in the deep ocean as a way of dealing with global warming.But DrCaldeira said that such a strategy should now be re-considered. "Previously, most experts had looked at ocean absorption of carbon dioxide as a good thing-because in releasing CO2 into the atmosphere we warm the planet, and when CO2, is absorbed by the ocean, it reduces the amount of greenhouse warming.”31. The ocean is becoming more acidic due to___________. A. the lower water PH value B. thewarming atmosphere C. the higher level of CO2 in the air D. the increasing use of oil fuels32. According to DrCaldeira,__________ .A. ocean absorption of carbon dioxide is a good thingB. more oil fuels will be used in the near futureC. scientists may predict climate changes with computer modelsD. the future situation of the amount of acidity is extremely serious33. If the water's acidity level keeps rising,_________ .A. ocean life whose structures contain calcium carbonate may be affectedB. the waters’ PH value will become higher and higherC. organisms living near the surface are more sensitive to PH changesD. some disasters will occur more often than before34. What does the underlined word “acidic” probably mean?A. 污染的B. 酸的C. 复杂的D. 温暖的35. The purpose of this passage is to_________ .A. show people the findings of a research teamB. inform people of how acid the ocean is nowC. introduceDrCaldeira and his team's researchD. warn people of the higher acidity level in the seaCJames Cleveland Owens was the son of a farmer and the grandson of black slaves. His family moved to Cleveland when he was 9. There, a school teacher asked the youth his name.“J. C.,” he replied.She thought he had said “Jesse”, and he had a new name.Owens ran his first race at age 13. After high school, he went to Ohio State University. He had to work part time so as to pay for his education. As a second-year student, in the Big Ten games in 1935, he set even more records than he would in the Olympic Games a year later.A week before the Big Ten meet, Owens accidentally fell down the stairs. His back hurt so much that he could not exercise all week, and he had to be helped in and out of the car that drove him to the meet. He refused to listen to the suggestions that he give up and said he would try, event by event. He did try, and the results are in the record book.Th e stage was set for Owens’ victory at the Olympic Games in Berlin the next year, and his success would come to be regarded as not only athletic but also political. Hitler did not congratulate any of the African-American winners.“It was all right with me,”he said years later. “I didn’t go to Berlin to shake hands with him, anyway.”Having returned from Berlin, he received no telephone calls from the president of his own country, either. In fact, he was not honored by the United States until 1976, four years before his death.Owens’ Olympic victories made little difference to him. He earned his living by looking after a school playground, and accepted money to race against cars, trucks, motorcycles, and dogs.“Sure, it bothered me,” he said later. “But at least it was an honest living. I had to eat.”In time, however, his gold medals changed his life. “They have kept me alive over the years,” he once said. “Time has stood still for me. That golden moment dies hard.”36. Owens got his other name when __________.A. he went to Ohio State UniversityB. his teacher made fun of himC. his teacher took “J. C.” for “Jesse”D. he won gold medals in the Games37.In the Big Ten meet, Owens _________.A. hurt himself in the backB. was weak but determined to winC. tried every sports event but failedD. had to give up some events38.Owens received no telephone calls from the president because _________.A. he was not of the right raceB. he was the son of a poor farmerC. he didn’t shake hands with HitlerD. he refused to listen to the suggestions that he give up39. Which of the following shows the correct order of James’ life?a. James worked part time to get the fee for schoolb. He was honored by the USc. He got success at the Olympic Gamesd. James set many records in Big Ten Gamese. He went to Cleveland with his familyf. Owens fell down and hurt his backA. a,e,f,d,b,cB. e,a,d,f,b,cC. a,e,d,f,c,bD. e,a,f,d,c,b40. What does the underlined sentence in the last paragraph probably mean?A. They have made him famous in the USB. They have been changed for money to help him live onC. They have encouraged him to overcome difficulties in lifeD. They have kept him busy with all kinds of jobsDItalian Lakes and Greek Islands (12 Days)Prices starting from$1,999Your tour begins in Milan, Italy, and moves on to the pretty Italian Lake District and the attractive resort of Stresa, your home for two nights. Collette Vacations has carefully chosen the Costa Victoria as your home away from home for your 7—night journey along the waterways of the Mediterranean. The cruise ship is filled with the warmth and culture of Italy and is richly designed with entertainment areas and very good living conditions. It will take you to the places of your dreams.You’ll spend 4 days touring Greek cities you’ve always heard about. In Katakolon, you will have the only unguided tour to nearby Olympia on the whole journey. Then with a local guide you willvisit the Greek islands of Santorini, which is often related to the story of the lost city of Atlantis, and Mykonos, a wonderful island with beautiful beaches.Your journey ends in Verona, home of the love story Romeo and Juliet, with a fun—filled farewell dinner—a perfect ending to a pleasant journey.12 Days, 25Meals: 10 Breakfasts, 6 Lunches, 9 DinnersDay 1 Overnight flight to ItalyDays2—3 Regina Palace, Stresa, ItalyDays4—10 Costa Victoria ( Costa cruises)Day 11 Hotel Leopardi, Verona, ItalyDay12 Leave for home41.How is the journey planned?A.It starts and ends in Italy. B.It starts and ends in Greece.C.It starts in Italy and ends in Greece. D.It starts in Greece and ends in Italy.42.What can be inferred from the travel plan?A.The prices include entertainment service.B.The prices include three meals a day.C.The price is the highest in summer.D.Tourists may think of a love story while visiting Santorini.43. Bob plans to take the 12-day trip with his parents in winter, how much do they need to pay?A. $5997B.$6927C.$6297D. $659744.What does the underlined part “ the Costa Victoria” most probably refer to?A.A famous hotel. B.A beautiful resort.C.A comfortable ship. D.A long—distance bus.45.Tourists will travel on their own in .A.Stresa B.Olympia C.Mykonos D.Verona四.阅读填空(共5小题,每题1分,共5分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。
2016-2017年湖北省武汉二中广雅中学九年级(下)月考数学试卷(3月份)(解析版)

第 4 页(共 24 页)
22. (10 分)东坡商贸公司购进某种水果的成本为 20 元/kg,经过市场调研发现,这种水果 在 未 来 48 天 的 销 售 单 价 p ( 元 /kg ) 与 时 间 t ( 天 ) 之 间 的 函 数 关 系 式 为 p =
, 且其日销售量 y (kg) 与时间 t (天) 的关系如表:
2016-2017 学年湖北省武汉二中广雅中学九年级(下)月考数学 试卷(3 月份)
一、选择题(共 10 小题,每小题 3 分,共 30 分) 1. (3 分)若 A.1<a<2 2. (3 分)若分式 A.x≠5 的值为 a,则 a 的范围为( B.2<a<3 ) C.3<a<4 ) D.x>﹣5 D.4<a<5
7. (3 分)下面几何体中,其主视图与俯视图相同的是(
A.
B.
C.
D.
8. (3 分)如图,是某校男子篮球队年龄分布条形统计图,这些年龄的众数和中位数分别为 ( )
第 1 页(共 24 页)
A.14,15
B.15,16
C.15,15
D.15,15.5
9. (3 分)如图,在平面直角坐标系中,点 P(1,4) 、Q(m,n)在函数 y= (x>0)的 图象上,当 m>1 时,过点 P 分别作 x 轴、y 轴的垂线,垂足为点 A,B;过点 Q 分别作 x 轴、y 轴的垂线,垂足为点 C、D.QD 交 PA 于点 E,随着 m 的增大,四边形 ACQE 的 面积( )
第 3 页(共 24 页)
50≤x<60 60≤x<70 70≤x<80 80≤x<90 90≤x<100
10 16 b 62 72
a 0.08 0.02 c 0.36
请你根据不完整的表格,回答下列问题: (1)请直接写出 m,a,b,c 的值; (2)若将得分转化为等级,规定 50≤x<60 评为“D” ,60≤x<70 评为“C” ,70≤x<90 评为“B” ,90≤x<100 评为“A” .这次全区八年级参加竞赛的学生约有多少学生参赛成 绩被评为“D”?
广州二模英语试题[word]及参考答案
![广州二模英语试题[word]及参考答案](https://img.taocdn.com/s3/m/2ad69d2cbceb19e8b8f6baae.png)
2016年广州市普通高中毕业班综合测试(二)英语第I卷第二部分阅读理解(共两节,满分40分)第一节(共15小题;每小题2分,满分30分)阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。
AThe best of adventure and sport in NSWIf you want adventure, then the state of New SouthWales (NSW) in Australia is the place to go. No matterwhat the season, you can choose from a wide variety oflandscapes, climates, activities and experiences all witheasy access to tour operators and local guides.For snow lovers, there’s no better place than theSnowy Mountains. Skiers and snowboarders can hit theslopes for some downhill thrills in Kosciuszko National.Park. Non-skiing adventure-seekers will enjoy hiking or snowshoeing.If water sports are more your thing, there are plenty of places to go. Surfers you’re your surfboards and head to Byron Bay, Shellharbour, or Newcastle's Merewether Beach. To see spectacular sea life up close, visit Lord Howe Island, a world-famous destination for underwater diving.The oceans, lakes and rivers around NSW offer a lifetime’s worth of exciting fishing and boating challenges. Want more? Experience the rush of whitewater rafting in Jindabyne and Penrith, or go barefoot waterskiing in Port Stephens.For adventure in NSW, the sky’s the limit! Book a hot-air-balloon or helicopter ride over the stunning vineyards of the Hunter Valley, go skydiving in Wollongong, or try hang-gliding in Stanwell Park.Get to know the State’s unique and tough landscapes on a caving, canoeing or rock climbing adventure. Four-wheel-driving and off-roading tours are popular in both Country NSW and Outback NSW. Or explore parts of the State on horseback ― you’Il find great horse riding options in Sydney and throughout NSW.21. What is the purpose of this article?A. To advertise a new holiday tour.B. To describe the geography of NSW.C. To promote NSW's tourist attractions.D. To encourage people to move to NSW.22. Where can you go barefoot waterskiing?A. Port Stephens.B. The Hunter ValleyC. Stanwell Park.D. Wollongong.23. Who are the intended readers?A. Families.B. Local guides.C. Photographers.D. Adventure travellersBThe United States of America was founded in 1776 after the 13 independent American states rose up against the ruling British, defeated them in the American Revolutionary War, and signed the Declaration of Independence, the document which declared the creation of the new country.The men who led the revolution, drafted the Declaration of Independence, and wrote the first American laws are known as " founding fathers". Benjamin Franklin, whose picture is on the US 100-dollar note, was appointed to prepare the Declaration that was eventually signed by the other founding fathers.Franklin was born in 1706 in Boston to a soap maker named Josiah Franklin. His father could not afford full schooling for all his children, but Benjamin loved books and worked in his elder brother's printing business before starting a newspaper called the Pennsylvania Gazette in 1729. He wrote and drew cartoons for the newspaper. In addition, he worked to improve living conditions in the city: introducing street lights, cleaning the roads and building libraries. In the 1740s, Franklin retired from his newspaper and turned to science with great success. He was a very smart man and his work on electricity, including the “kite experiment” which confirmed the nature of lightning, made him famous throughout the world.Franklin earned the title of the “First American” for his efforts to unite the 13 American states, and to win their independence. This part of the story starts in London. He was sent to the city to persuade the British to treat the American states more fairly. It was here that he began interacting with important political thinkers and activists of the time and developing his own political ideas.Following his return to America in 1761 he became much more active in American politics and in the battle against British rule.After the United States of America was established, Franklin held several important positions such as the first United States Postmaster General, Ambassador to France and President of Pennsylvania. He is also famous today for his wise sayings, including “a penny saved is a penny earned” and “an ounce of prevention is worth a pound of cure”.24. What is the article mainly about?A. The American Declaration of Independence.B. Franklin's contributions to American society.C. The American War of Independence.D. Benjamin Franklin's early life.25. How did Franklin begin developing his own political thinking?A. By discussing ideas with political activists in Britain.B. By persuading the 13 American states to unite.C. By fighting against British rule in America.D. By writing articles for his own newspaper.26. What can be inferred about Franklin from the article?A. His most important contribution was in science.B. He was th e leader of the “founding fathers”.C. He was successful in many different areas.D. He came from a very wealthy family.27. What is the correct order for the following events from Franklin’s life?a. He started a newspaper business.b. He carried out the kite experience on electricity.c. He worked for his brother in a printing company.d. He was appointed the Ambassador to France.e. He helped write the Declaration of Independence.f. He visited England to discuss independence.A. e, c, a, b, f, dB. c, a, b, f, e, dC. a, c, f, b, d, eD. f, d, a, b, c, eCWhether or not you believe Professor Stephen Hawking's alarming theory that building a “strong” artificial intelligence (AI) could lead to the end of the human race, it’s clear that AI is reaching the point where soon it will affect almost every aspect of how we work with computers. We must get used to computers that talk back.Last year, investment bank Deep V entures attracted much media attention when it announced that it had appointed an AI computer to its board of directors to help make important business decisions. What actually happened was that the company used a program called VITAL to analyse potential investments (授资) in different businesses. But VITAL doesn't attend board meetings or vote ― it’s just a program. While it's not quite the evil robot we see in science fiction movies, it shows us how far computers and AI have advanced.Soon AI systems will be driving our vehicles, interpreting our facial expressions as we perform complex tasks, translating our voices into different languages and building other machines for us in factories around the world. But they won't look like us or pretend to be human.In the new film Ex Machina, a computer scientist is asked to assess whether a beautiful human-looking robot called Ava has human intelligence. I won't spoil the film for you, but it occurred to me that one of the reasons we believe other human beings are conscious and have intelligence is that we’re told they are all .the time. Indeed, if you stopped believing other people have minds, you would quickly find yourself unable to function in the world.Google’s Eric Schmidt argues that we shouldn't worry about AI, and that we need instead to redesign our education systems so that we learn how to get on with the machines. As powerful computer-based intelligences continue developing, we must let go of the belief that only humans have intelligence and consciousness. Just as we have accepted the reality that the self-awareness that makes minds possible exists within the animal world, we may soon accept that it can also exist within the machine world.28. According to Professor Stephen Hawking, human beings .A. may be endangered by strong AIB. are still more intelligent than machinesC. will benefit greatly from the advances in AID. will never be able to build a strong AI system29. According to Paragraph 2, VITAL can .A. attend board meetings to voteB. make final decisions for the bankC. attract more investments to the bankD. assess the value of different businesses30. The author predicts that AI machines will soon be able to .A. control people's facial expressionsB. construct other intelligent machinesC. have a human-like physical appearanceD. change people's speeches into different languages31. Which of the following would the author most probably agree with?A. It is too late to stop the danger of artificial intelligence. . .B. Humans should learn to live with intelligent machines.C. Intelligent machines will eventually control the world.D. Only humans can have intelligence and consciousness.DMature-age university students are annoying, I know. I understand that when you're 18 or 19, and already know everything, there's no need to do the readings or show up prepared for class. I also understand that there are these old people in class who should be doing other things — maybe retiring, or gardening in the backyard. They are eagerly asking questions (or worse, answering them) and generally loud.I understand because I used to be one of them. I dropped out of high school in Year 11 and after playing guitar in a band for a few years, I spent the next ten years working different jobs. Then a friend, who thought I was wasting my life, suggested I enrol at his university. Although afraid, I eventually took a university preparation course and a year later became a 35-year-old university freshman.Like many mature-age students, after completing my degree, I continued studying and eventually attained my PhD.Now I’m a lecturer at Toronto University in Canada. In fact, I have just finished preparing a group of mature-age students to annoy next year’s young first years. My students come from many different backgrounds. But they all share an enthusiasm for knowledge and learning.I know they are ridiculous and show up to class with folders full of readings, minds overflowing with ideas and concepts they want to discuss. I was the same. But, contrary to the stereotype of the annoying mature-age students occupying the airtime in class, most don't want to control the discussion.They’re likely to be waiting, counting away the seconds silently in the hope that someone will want to talk about all of these amazing ideas we’re learning about. Only after waiting for younger voices to speak. ( but which often remain silent) do they begin talking.Speaking for myself, I love students who come prepared and ready to discuss stuff. So let's celebrate all of those “annoying”mature-age students.32. According to the article, a mature-age student is a person .A. who behaves like an adult B . studying for a higher degreeC. not yet qualified to enter universityD. who starts university at an older age33. In the first paragraph, the author .A. shows that he is opposed to mature-age studentsB. describes the problems mature-age students createC. makes fun of the attitude held by many young students.D. explains why many teachers dislike mature-age students34. What does the underlined word “them” in Paragraph 2 refer to?A. Retired people.B. Early high school leavers.C. Mature-age university students.D. University students aged below 20.35. Why do mature-age students often wait before speaking in class?A. They are not very familiar with the topic being discussed.B. They want to give the younger 'students more chances to speak.C. They lack the ability to give their opinions.D. They are more interested in hearing others' opinions.第二节(共5小题,每小题2分,满分10分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。
2016广州市广雅初三一模

2.下列运算正确的是( A. x 2 x 3 x 6
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4.若代数式 x 1 有意义,则实数 x 的取值范围是( A. x 1 B. x 1
第二部分
非选择题(共 120 分)
二、填空题(本大题共 6 小题,每小题 3 分,满分 18 分) 11.分解因式: 3x2 6 xy 3 y 2 _____________. 12.已知正比例函数 y kx ( k 0 )的图像上有 A ( x1 , y1 ) 、 B ( x2 , y2 ) 两点,若 x1 x2 0 ,则 y1 、 y2 的 大小关系是______________. 13.实数 a 在数轴上对应的点的位置如图所示,化简 a 3 的结果是_____________.
,这次体育测验成绩的众数和 7.有 5 名同学进行体育测验,成绩分别是 70 , 80 , 85 , 75 , 85 (单位:分) 中位数分别是( A. 79 分, 85 分 ) B. 80 分, 79 分 C. 85 分, 80 分 D. 85 分, 85 分 )
8.如图, AB 是 O 的直径,弦 CD AB ,垂足为 E ,如果 AE 4 , CD 20 ,那么 O 的半径长为( A.
27 2
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2016白云广雅九下二模试卷一、语法选择With the development of science, many inventions have changed our life. In the past, when our parents couldn’t find us and wondered ___1__we were, there were just worried and waited. When we wanted to tell others. ___2__ good news as soon as we got it, we just waited. Now there ___3__ some changes. Since the cell phone ___4___, it has done a lot for us. It’s much____5__to get in touch with our family and our friends living far away. We even __6___people in other part of the world . Also, two lovers can use cell phone ___7____messages to each other. They share happiness__8___each other all the time. It makes the smaller than before. People can be closer____9___ the cell phone.__10___cell phones help us a lot in our daily life, they bring us some problems. First, __11___cell phones too often is bad for our health. Second, they make___12___much noise that disturb(打扰)our life. Students ___13___have cell phone may use them for playing games or sending messages in class, because they are too young to control_____14___. This will certainly affect their study. It’s hard to say ___15____it is good for us to have cell phones.1. A. when B. where C. which D. what2. A. a B. an C. / D. the3. A. have B. has C. are D. is4. A. invent B. invents C. was invented D. invented5. A. easy B. easier C. easiest D. easily6. A. contact B. is contacting C. contacted D. contacts7. A. send B. sent C. sending D. to send8. A. to B. for C. with D. from9. A. for B. because of C. because D. so10. A. However B. Though C. And D. But11. A. use B. uses C. using D. to use12. A. so B. such C. very D. too13. A. when B. whom C. which D. who14. A. themselves B. they C. their D. them15. A. that B. whether C. why D. what二、完型填空。
Happiness is for everyone. You don’t need to worry about people who have beautiful __16___with large gardens, or those who have nice cars and much money. Why? Because those who have big houses may often feel___17___ and those people who have___18___may want to walk on the country roads during their free time.In fact, happiness is always around you if you put your heart into it. When you are in trouble at school, your friends will__19___ you. When you study hard at your lessons, your __20___are always taking good care of your life and health. When you are ____21____, your friends will congratulate you. When you do something wrong, people around you will help you___22___the mistake. And when you do something __23____for others, you and others will feel happy , too. All of these things are signsof __24.____Happiness is a feeling of your heart. When you _______ difficulties, you say loudly that you are very happy, because you have more opportunities to challenge yourself. you cannot always say that you are poor and luck.. As the saying goes, life is like a revolving(旋转的) door. When it closes, it also opens. If you take every chance you get, you can be a happy and lucky person.16.A houses B. homes C. rooms D. families17. A. interesting B. lonely C. happy D.excited18.A.money B.gardens C. cars D.buildingsugh B.leave C. hit D.help20.A.teachers B.classmates C. friends D.parents21.A.upset B.unhappy C. successful D.sick22.A.correct B.change C. cut D.continue23. A.bad B.good C. cruel D.careless24.A.friendship B.happiness C. failure D.sadness25.A.want B.know C. meet D.lose三、阅读理解。
AOne day after school, I went to the teacher's office to see my teacher, but nobody was there. As I was about to leave, I noticed a piece of paper on the floor. I picked it up and saw the words "FINAL-TERM EXAMINATION" at the top. I put the paper into my school bag secretly and ran out of the room.After I came back home, I took out the paper quickly. It was the exam paper of my worst subject, History. I felt excited. My heart beat fast. I took out my History book and started working on the answer. I had never answered any questions so seriously. On the day of the History exam, I went into the exam hall confidently. When the paper was sent to me, I dream of getting the highest mark in the whole grade and could not help smiling. "My History teacher always encouraged me to work hard and get better grades, but I let him down time and time again. This time I will give him a big surprise," I thought.When the teacher said we could start, I turned the paper over. To my surprise, all the questions were different. Later I felt nervous. In the end, I almost left the paper undone. After the ex m. I ran to the toilet, took out the paper and carefully read it from the top. Oh! It was last year's exam paper. I read all the questions but I hadn't read the date.This is a lesson in which I know I have to put my feet on the ground. I regretted doing such a silly thing. After that, I told my teacher the truth and I promised to be honest. From then on, I worked harder than ever before.1.The writer went to the teacher's office to _________.A. take an examB. see his teacherC. get his school bagD. ask some questions2. The writer always _________ in his History exams.A. got high marksB. did silly thingsC. let his teacher downD. left the paper undone3. The writer felt _________ when he first saw all the questions were different.A. surprisedB. excitedC. nervousD. crazy4. When did the writer know it was last year's exam paper?A. Before he read all the questions.B. As soon as he returned home.C. Until he went into the teacher's office.D. After he read the paper in the toilet.5. What might the writer write in his diary?A. I'm glad that I did very well in the exam. I gave my teacher...B. After the exam, my teacher asked me to go to his office. My heart...C. When I turned over the paper, I couldn't help smiling. My teacher...D. I'm truly sorry for what I did. Everyone should be honest. I'll ...BEnglish teenagers will receive cooking lessons in schools. The idea is to encourage healthy to solve the problem that many people are overweight. Also, it worries people that basic cooking and food preparation skills are being lost because parents use too much pre-prepared fast foods.Cooking was once regarded as an important part of education in England-even if it was mainly for girls. In recent years cooking has become less important in schools. But the rising level of obesity(肥胖) has led to a rethink about the food that children are given and the skills they should be taught." What we want is to teach young people how to do basic,simple meals, which they can use now at home and then in their later life," said Ed Balls, an education expert. The new lessons will start in September, but some schools without kitchen will be given a longer time to prepare. Also there may be a shortage of teachers with the right skills, since schools have been teaching food technology rather than practical cooking. Besides, the lessons for hands-on cooking will only be one hour a week for one term. But the well-known cookery writer, Pru Leith, believe it will be worth it." If we'd done this thirsty years ago we might not have to face the problem about obesity and lack of knowledge about food and so on. Every child should know how to cook, not just so that they'll be healthy, but because it's a life skill which is a real pleasure."The renewed interest in cooking is an effort to reduce the obesity rate, which is almost the highest in Europe, and according to the government, half of all British people will be obese in 25 years if present trends(趋势) are not halted.1.Which of the following is Not the aim of bringing back cooking lessons in Britain?A. To encourage teenagers to eat healthy food.B. To reduce the country's increasing obesity rate.C. To prevent basic cooking and food preparation skills from being lost.D. To encourage parents to use more pre-prepared fast foods.2. How will cooking lessons do good to the students?A. All of them will become good cooks in their later life.B. Students will be healthy and enjoy the pleasure of such a life skill as well.C. Students will be able to make food experiments with the knowledge and skills.D. Students will be able to control the level of obesity in the whole country.3. The underlined word "halted" in the last paragraph probably means _____.A.continuedB.stoppedC.discussedD.kept4. It can be inferred from the passage that _____.A.cooking has always been an important part of school education in EnglandB.English teenagers will have their cooking lessons one hour a month for one yearC.the obesity rate in Britain has been growing rapidly in recent yearsD.the students will pay much money for their cooking lessons5. The passage mainly talks about _______ .A.the compulsory cooking classes B.the lost cooking skillsC.the healthy eating D.the reason for obesityCOn October5, Tu Youyou, 84, became the first Chinese to win a Nobel Prize in natural science. She is only the12th woman in history to be awarded the honor.Tu was born in Ningbo, Zhejiang, China on 30 December 1930. She once studied at Xiaoshi Middle School and Ningbo Middle School. Her teacher said that Tu liked reading books and she was very hard-working. From 1951 to 1955, she attended Beijing Medical College. Later Tu was trained for two and a half years in traditional Chinese medicine.Tu was given the award for her discovery of artemisinin(青蒿素), which has been developed to fight against malaria(疟疾). When Tu started her search in the late 1960s, over 240,000 compounds(化合物)around the world had already been tested, without any success. Her interest in traditional Chinese medicine drew her to ancient texts and finally found the sweet wormwood(青蒿),which had been used to treat malaria in China around 400 A.D. After more than190 failures, she invented the right drug in 1971.Tu Youyou doesn’t have a Ph.D., neither has she ever studied or worked overseas. One former colleague, Liao Fuming, who has worked with Tu for more than 40 years, describes her as a “tough and stubborn(固执)woman.”Tu is stubborn enough to spend many years putting ancient texts together and use them inmodern scientific practices. The result is millions of lives saved."She has done wonderful contribution to the world with her work, she really deserves it! It's a blessing for the Chinese people, as it is for the world!" Mats Wahlgren, member of the Nobel Assembly said.1. How old was Tu Youyou when she graduated from Beijing Medical College?A. 12 years old.B. 21 years old.C. 25 years old.D. 28 years old.2. By saying “over 240,000 compounds around the world had already been tested, without any success.”, the writer wants to tell us that____________________A. Tu’s research work against malaria was very di fficult.B. scientists at that time were good at testing medicine.C. Tu got a lot of help from the world with her research work.D. scientists had successfully inventing medicine against malaria.3. Where did Tu finally find the medicine she wanted?A. At her middle school library.B. In Chinese ancient texts.C. In universities abroad.D. In modern science magazines.4. Which of the words best describes Tu Youyou?A. Proud.B. Humorous.C. Active.D. Hard-working.5. What is the best title for the passage?A. Tu Wins the Nobel PrizeB. Tu, a clever Chinese womanC. Traditional Chinese medicineD. How malaria was defeated1. If you want to be a postman, it’s necessary for you to have _____________.A. working experienceB. good knowledge of the cityC. a driver’s licenseD. a college student’s card2. Sunshine School needs _____________.A. excellent English teachersB. a hard-working postmanC. full-time driversD. an outgoing tour guide3. If you want to be a taxi driver, you should _____________.A. be over 45 years oldB. know the city very wellC. write to No. 38 Changhong Rd.D. speak English well4. The tour guides wanted should ____________.A. have no working experienceB. be patient with childrenC. be good at drivingD. speak good English5. You cannot get information by ___________ if you want to get a job above.A. making a callB. going to visit the managerC. sending an e-mailD. writing a letter第二节阅读填空Time to DanceAre you the kind of person who likes to move with music? It's a natural thing to do. Even little children start jumping up and down when they hear music.Scientists say that animals dance, too. ___1_____ . The "dances" of animals send messages to other animals. But when people dance, they express feelings about life and love, or about these very human experiences.___2_____. For one thing, dancing is good for you physically. It makes your heart work and makes you breathe fast. ___3______. If you go dancing often, you can keep physically fit. You may feel very tired after dancing, but you’ll probably also feel relaxed and happy. This is another important point about dancing. It gives you a chance to express your feelings and feel better about yourself____4_____, dancing helps those feelings go away._____5_____ Some dances are for couples and some are for groups. But all kinds of dances give you a chance to meet new people or to do something enjoyable with friends.A.But their dancing is different.B.And finally, it's a social activity.C.If you are angry or upset about something.D. It also makes you use your arms and your legs.E. Dances are good for you in many ways.四、写作第一节单词拼写。