2016年江西中考数学试卷答案

第一篇：2016年江西中考数学试卷答案

2016年江西中考数学试卷答案

参考答案与试卷解析

说明：

1、本卷共有六个大题，23个小题，全卷满分120分。

2、本卷分为试题卷和答题卡，答案要求写在答题卡上，不得在试卷上作答，否则不给分。

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一、选择题

1、A

2、D

3、B

4、C

5、D

6、C

二、填空题 7、8、9、10、11、12、-1 a(x+y)(x-y)17° 50 ° 4

第二篇：2010年安徽中考数学试卷及答案

初中数学辅导网 www.xiexiebang.com

一．选择题：（本大题10小题，每小题4分，满分40分）

1.在1,0,1,2这四个数中，既不是正数也不是负数的是…………………………（）A）B）0

C）1

D）2

2.计算(2x3)x的结果正确的是…………………………（）A）8xB）6x2

C）8x

3D）6x3

3.如图，直线l1∥l2，∠1＝55，∠2＝65，则∠3为…………………………（）A）500.B）550

C）600

D）650

4.2010年一季度，全国城镇新增就业人数为289万人，用科学记数法表示289万正确的是

…………………………（）

A）2.89×107.B）2.89×106.C）2.89×105.D）2.89×104.5.如图，下列四个几何体中，其主视图、左视图、俯视图中只有两个相同的是

6.某企业1~5月分利润的变化情况图所示，以下说法与图中反映的信息相符的是………………（）A）1~2月分利润的增长快于2~3月分利润的增长 B）1~4月分利润的极差于1~5月分利润的极差不同 C）1~5月分利润的的众数是130万元 D）1~5月分利润的的中位数为120万元

7.若二次函数yxbx5配方后为y(x2)k则b、k的值分别为 2200………………（）

A）0.5

B）0.1

C）—4.5

D）—4.1

8.如图，⊙O过点B、C。圆心O在等腰直角△ABC的内部，∠BAC＝900，OA＝1，BC＝6，则⊙O的半径为………………（）

A）10B）23C）32D）13

初中数学辅导网 www.xiexiebang.com 9.下面两个多位数1248624……、6248624……，都是按照如下方法得到的：将第一位数字乘以2，若积为一位数，将其写在第2位上，若积为两位数，则将其个位数字写在第2位。对第2位数字再进行如上操作得到第3位数字……，后面的每一位数字都是由前一位数字进行如上操作得到的。当第1位数字是3时，仍按如上操作得到一个多位数，则这个多位数前100位的所有数字之和是…………………………………………（）

A）495

B）497

C）501

D）503 10.甲、乙两个准备在一段长为1200米的笔直公路上进行跑步，甲、乙跑步的速度分别为4m/s和6m/s，起跑前乙在起点，甲在乙前面100米处，若同时起跑，则两人从起跑至其中一人先到达终点的过程中，甲、乙两之间的距离y(m)与时间t(s)的函数图象是 ……………………………………………………………………………（）

填空题（本大题4小题，每小题5分，满分20分）11.计算：312.不等式组62_______________.x42,3x48的解集是_______________.13.如图，△ABC内接于⊙O，AC是⊙O的直径，∠ACB＝500，点D是BAC上一点，则∠D＝_______________

14.如图，AD是△ABC的边BC上的高，由下列条件中的某一个就能推出△ABC是等腰三角形的是__________________。（把所有正确答案的序号都填写在横线上）①∠BAD＝∠ACD

②∠BAD＝∠CAD，③AB+BD＝AC+CD ④AB-BD＝AC-CD

三，（本大题共2小题，每小题8分，共16分）15.先化简，再求值：(11a1)a4a4aa22，其中a1

初中数学辅导网 www.xiexiebang.com 16.若河岸的两边平行，河宽为900米，一只船由河岸的A处沿直线方向开往对岸的B处，AB与河岸的夹角是60，船的速度为5米/秒，求船从A到B处约需时间几分。（参考数据：31.7）

四．（本大题共2小题，每小题8分，共16分）17.点P(1，a)在反比例函数ykx0的图象上，它关于y轴的对称点在一次函数y2x4的图象上，求此反比例函数的解析式。

18.在小正方形组成的15×15的网络中，四边形ABCD和四边形ABCD的位置如图所示。⑴现把四边形ABCD绕D点按顺时针方向旋转900，画出相应的图形A1B1C1D1，⑵若四边形ABCD平移后，与四边形ABCD成轴对称，写出满足要求的一种平移方法，并画出平移后的图形A2B2C2D

2初中数学辅导网 www.xiexiebang.com 五．（本大题共2小题，每小题10分，共20分）

19．在国家下身的宏观调控下，某市的商品房成交价由今年3月分的14000元/m2下降到5月分的12600元/m2

⑴问4、5两月平均每月降价的百分率是多少？（参考数据：0.90.95）

⑵如果房价继续回落，按此降价的百分率，你预测到7月分该市的商品房成交均价是否会跌破10000元/m2？请说明理由。

20.如图，AD∥FE，点B、C在AD上，∠1＝∠2，BF＝BC ⑴求证：四边形BCEF是菱形

⑵若AB＝BC＝CD，求证：△ACF≌△BDE

21.上海世博会门票价格如下表所示：

某旅行社准备了1300元，全部用来购买指定日普通票和平日优惠票，且每种至少买一张。⑴有多少种购票方案？列举所有可能结果；

⑵如果从上述方案中任意选中一种方案购票，求恰好选到11张门票的概率。

初中数学辅导网 www.xiexiebang.com 22.春节期间某水库养殖场为适应市场需求，连续用20天时间，采用每天降低水位以减少捕捞成本的办法，对水库中某种鲜鱼进行捕捞、销售。

九（1）班数学建模兴趣小组根据调查，整理出第x天（1x20且x为整数）的捕捞与销售的相关信息如下：

⑴在此期间该养殖场每天的捕捞量与前一末的捕捞量相比是如何变化的？ ⑵假定该养殖场每天捕捞和销售的鲜鱼没有损失，且能在当天全部售出，求第x天的收入y（元）与x（天）之间的函数关系式？（当天收入＝日销售额—日捕捞成本）

试说明⑵中的函数y随x的变化情况，并指出在第几天y取得最大值，最大值是多少？

23.如图，已知△ABC∽△A1B1C1，相似比为k（k1），且△ABC的三边长分别为a、b、c（abc），△A1B1C1的三边长分别为a1、b1、c1。

⑴若ca1，求证：akc；

⑵若ca1，试给出符合条件的一对△ABC和△A1B1C1，使得a、b、c和a1、b1、c1进都是正整数，并加以说明；

⑶若ba1，cb1，是否存在△ABC和△A1B1C1使得k2？请说明理由。

初中数学辅导网 www.xiexiebang.com

初中数学辅导网 www.xiexiebang.com

初中数学辅导网 www.xiexiebang.com

第三篇：word版2014北京中考数学试卷及答案

2014北京中考数学

2014年北京中考数学试卷

一、选择题

下面各题均有四个选项，其中只有一个是符合题意的.1.2的相反数是

A.2B.-2C.-D.2.据报道，某小区居民李先生改进用水设备，在十年内帮助他居住小区的居民累计节水 300 000吨，将300 000用科学计数法表示应为

6564A.0.3×10B.3×10C.3×10D.30×10

3.如图，有6张扑克牌，从中随机抽取一张，点数为偶数的概率是

A.B.C.D.4.右图是某几何体的三视图，该几何体是

A.圆锥B.圆柱

C.正三棱柱D.正三棱锥

5.某篮球队12名队员的年龄如下表所示：

则这12名队员年龄的众数和平均数分别是

A.18,19B.19,19C.18，19.5D.19,19.56.园林队在某公园进行绿化，中间休息了一端时间.已知绿

化面积S（单位：平方米）与工作时间t（单位：小时）的函数关系的图象如图所示，则休息后园林队每小时绿化

面积为

A.40平方米B.50平方米

C.80平方米D.100平方米

7.如图，O的直径AB垂直于弦CD，垂足是E，∠A＝22.5°，OC＝4，CD的长为

A.2B.4C.4D.8

8.已知点A为某封闭图形边界上一定点，动点P从点A出发，沿

其边界顺时针匀速运动一周.设点P运动的时间为x，线段AP的长为y，表示y与x的函数关系的图象大致如右图所示，则该封

闭图形可能是

二、填空题

429.分解因式：ax－9ay＝____________.10.在某一时刻，测得一根高为1.8m的竹竿的影长为3m，同时测得一根旗杆的影长为25m，那么这根旗杆的高度为______________m.11.如图，在平面直角坐标系xOy中，正方形OABC的边长为2.写出一个函数y＝（k≠0），使它的图象与正方形OABC有公

共点，这个函数的表达式为______________.12.在平面直角坐标系xOy，对于点P（x，y），我们把点P′（-y+1，x+1）叫做点P的伴随

点.已知点A1的伴随点为A2，点A2的伴随点为A3，点A3的伴随点为A4，…，这样依次得到点A1，A2，A3，…，An，….若点A1的坐标为（3,1），则点A3的坐标为______，点A2014的坐标为__________；若点A1的坐标为（a，b），对于任意的正整数n，点An均在x轴上

方，则a，b应满足的条件为____________.三、解答题

13.如图，点B在线段AD上，BC∥DE，AB＝ED，BC＝DB.求证：∠A＝∠E.0-114.计算：（6－π）＋（-）－3tan30°＋||.15.解不等式x－1≤x－，并把它的解集在数轴上表示出来

.216.已知x－y＝，求代数式（x+1）－2x+y（y－2x）的值.217.已知关于x的方程mx－（m+2）x+2＝0（m≠0）.（1）求证：方程总有两个实数根；

（2）若方程的两个实数根都是整数，求正整数m的值.18.列方程或方程组解应用题：

小马自驾私家车从A地到B地，驾驶原来的燃油汽车所需油费108元，驾驶新购买的纯 电动汽车所需电费27元.已知每行驶1千米，原来的燃油汽车所需的油费比新购买的纯电动 汽车所需的电费多0.54元，求新购买的纯电动汽车每行驶1千米所需的电费.四、解答题

19.中，AE平分∠BAD，交BC于点E，BF平分∠ABC，交AD于点F，AE与BF交于点P，连

接EF，PD.（1）求证：四边形ABEF菱形；

（2）若AB＝4，AD＝6，∠ABC＝60°，求tan∠ADP的值.20.根据某研究院公布的2009-2013年我国成年国民阅读调查报告的部分相关数据，绘制的统计图表如下：

根据以上信息解答下列问题：

(1)直接写出扇形统计图中m的值：

(2)从2009到2013年，成年国民年人均阅读鄹书的数量每年增长的幅度近似相等，估算

2014年成年国民年人均阅读图书的数量约为______本；

(3)2013年某小区倾向图书阅读的成年国民有990人，若该小区201 4年与201 3年成年

国民的人数基本持平，估算2014年该小区成年国民阅读图书的总数量约为______本.21.如图，AB是⊙O的直径，C是的中点，⊙O的切线BD交AC的延长线于点D，E是OB的中

点，CE的延长线交切线DB于点F，AF交⊙0于点H，连接BH.(1)求证：AC=CD；

(2)若OB=2，求BH的长.22.阅读下面材料：

小腾遇到这样一个问题：如图1，在△ABC中，点D在线段BC上，∠BAD=75°，∠CAD=30°，AD=2，BD=2DC，求AC的长.小腾发现，过点C作CE∥AB，交AD的延长线于点E，通过构造△ACE，经过推理和计算能够使问题得到解决（如图2）

请回答：∠ACE的度数为______，AC的长为______

参考小腾思考问题的方法，解决问题：

如图3，在四边形ABCD中，∠BAC=90°，∠CAD=30°，∠ADC=75°，AC与BD变于点E，AE=2，BE=2ED．求BC的长.五、解答题（本题共22分，第 23题7分，第24题7分．第25题8分）

223在平面直角坐标系xOy中，抛物线y=2x+mx+n经过点A(0，-2)，B(3，4).(1)求抛物线的表达式及对称轴；

(2)设点B关于原点的对称点为C，点D是

抛物线对称轴上一动点，记抛物线在A,B

之间的部分为图象G（包含A，B两点）.若直线CD与圉象G有公共点，结合函数

图象，求点D纵坐标t的取值范围.24在正方形ABCD外侧作直线AP，点B关于直线AP的对称点为E，连接BF，DE，其中DE

交直线AP于点F.（1）依题意补全图1；

（2）若∠PAB=20°．求∠ADF的度数；

（3）如图2，若45°＜∠PAB＜90°，用等式表示线段AB，FE，FD之间的数量关系，并证明.25.对某一个函数给出如下定义：若存在实数M＞0，对于任意的函数值y，都满足-M≤y≤M，则称这个函数是有界函数.在所有满足条件的M中，其最小值称为这个函数的边界值.例如，下图巾的函数是有界函数，其边界值是1.(1)分别判断函数y(x＞0)和y=x+1(-4＜x≤2)是不是有界函数？若是有界函散，求其边界

值；

(2)若函数y=-x+l(a≤x≤b，b＞a)的边界值是2，且这个函数的最大值也是2，求b的取

值范围；

2(3)将函数y=x(-l≤x≤m，m≥0)的图象向下平移m个单位，得到的函数的边界值是t，当m在什么范围时，满足≤t≤1？

第四篇：2018年江西中考英语试题及答案

2018年江西中考英语试题及答案

二、单项填空(8分)请阅读下面各题,从题中所给的A、B、C、D四个选项中选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。(每小题1分)28.The food is very delicious in that restaurant.We could go and ______ it? A.sell B.help C.produce D.try 29.Susan never gets upset when she has to wait in line.She is very ______.A.shy B.honest C.funny D.patient 30.--Could I speak to Paul? I phoned _____.--Sorry he is still in his meeting.A.late B.earlier C.earliest D.later 31.Sorry I'm late.I _______ with a friend and I completely forgot the time.A.talk B.am talking C.was talking D.will talk 32.I live near a big _______.It gets very noisy on match days.A.hospital B.store C.bank D.playground 33.--Can students go online during lessons?--They can ________ it is for that lesson.A.if B.or C.so D.but 34.Kids have to take many after school classes.They _______ hard to study for good grades.A.push B.are pushed C.are pushing D.have pushed 35.We ________ a party for Kate It's supposed to be a surprise.A.were having B.had C.will have D.have had

三、完型填空(25分)A)请先阅读下面短文,掌握其大意,然后从各小题所给的A、B、C、D四个选项中选出可以填入相应空白处的最佳选项,并在答题卡上将该项涂黑。(每小题1分)There are purple clothes, purple handbags, purple bicycles, purple furniture, even purple computers!So purple is one of the most 36 colors today.But in the past, purple was a very expensive and unusual color.Let’s take a look at the rich 37 of the color purple.Some scientists believe that the first plants to appear on Earth over 500 million years ago 38 looked purple, not green.Plants today are green because 39 use green chlorophyll(叶绿素)to produce energy.40 these early plants probably used something called retinal, which is a dark purple color.During the time of the roman Empire(37 BC-476 AD), it was very 41 to make purple dye(染料).The dye came from sea snails(海螺).But10.000 dead sea snails 42 you just one gram(克)of purple dye… as well as a very bad smell!This 43 purple dye was called Tyrian purple, and it was the preferred 44 of emperors.In 16th--century England, purple was 45 for the kings family members.Queen Elizabeth Is clothes were purple, but ordinary people were not allowed to 46 the color.In 1856.William Perkin, an 18-year-old 47 student, noticed something strange while doing an experiment(实验).The chemicals(化学药品)he used to clean his instruments 48 with the chemicals he used in his experiment and produced a bright purple color.This 49 Perkin to start a company using this chemical mixture to make purple dye.The dye was much 50 than sea snail dye.Thanks to Perkin, now anyone can afford to wear purple clothes.36.A.peaceful B.popular C.exciting D.serious 37.A.history B.style C.research D.product 38.A.gradually B.especially C.exactly D.probably 39.A.others B.they C.we D.some 40.A.And B.So C.But D.Until 41.A.dangerous B.common C.difficult D.strange 42.A.got B.passed C.wasted D.cost 43.A.basic B.harmful C.special D.perfect 44.A.color B.smell C.plant D.animal 45.A.even B.never C.seldom D.only 46.A.wear B.sell C.change D.make 47.A.geography B.science C.art D.math 48.A.compared B.mixed C.collected D.kept 49.A.survey B.suggestion C.discovery D.exam 50.A.healthier B.thicker C.cheaper D.darker B)请先阅读下面短文,掌握其大意,然后用方框中所给词的适当形式填空,并将答案填写到答题卡的相应位置。每个词限用一次。(每小题1分)know life different back and interesting sign real find they The planet Mars is the closest and most similar planet to Earth.It is very 51 to scientists.For example, Mars has seasons with 52 weather, but other planets have the same temperatures all year round.Was there 53 on Mars? To find out, scientists need 54 if Mars ever had water.In 2004.two robot explores(探测器), or 'rovers', called Spirit and Opportunity were sent to look for 55 of water.These rovers can drive over rocks 56 all kind of rough ground.They can also use cameras and send photos 57 to Earth.First, the two rovers found chemicals and patterns(图文)in the rocks that were probably made by water.Then, they moved to another area and 58 other rocks which may have been created by water.Now scientists think there was probably water on the planet long ago.Today 59 are still not sure if there was life on the mars.They 60 need more information to decide.The discoveries of the two rovers answered some old questions, but they also brought up many new ones.四、阅读理解（40分）

A)请阅读下面短文,根据短文内容从每小题所给的A、B、C、D四个选项中选出最佳选项,并在答题卡上将选项涂黑。(每小题2分)A Science museum(The Science of Survival, IMAX&SIMEX)The Science Museum has something for everyone.Entry to the museum is free.Offer applies to IMAX 3D Cinema, SIMEX and The Science of Survival exhibition only.IMAX ￡7.50 SIMEX ￡4.00 The Science of Survival ￡6.00 Opening Times: Daily 10: 00-18: 00 Visit Time: 2 hours National Gallery Opening Times: Daily 10am-7pm Wednesday until 9 pm Admission: ￡8 adults.￡4 students, under 12s free Tickets: Available daily from 10 am Telephone: 020 7747 2885 Visituswww.xiexiebang.com ZSL London Z There are over 12, 000 amazing animals for you to see.These are just a few things which make a visit to ZSL London Zoo a great day.Ticket Price: ￡ 17.00 Opening Times: Daily 10: 00-17: 30 Visit Time: 4 hours 61.How much does the ticket to ZSL London Zoo cost? A.￡8.00.B.￡17.50.C.￡17.00.D.￡7.50.62.Where is the Science of Survival exhibition held? A.At the National gallery B.At the Science Museum C.At ZSL London zoo D.At IMAX 3D Cinema 63.How long is the National Gallery open on Wednesday? A.4 hours B.8 hours C.7 hours D.11 hours B

A young woman turns around and around quickly, and jumps high.In the background, a young girl reads a rejection(拒绝)letter from a ballet school.You have the wrong body for ballet, 'it says,' and at thirteen, you are too old.This was one of the most popular advertisements(广告)of 2014 and it describes American ballet Theatre's principal(主要的)dancer Misty Copeland.This was not a real letter.But Copeland says it is very similar to letters from her childhood.While many dancers start at the age of three.Copeland only began to study ballet in 1995 as a thirteen-year-old.People often told her that she was too old, or that she didn't have the perfect body type(She is only 157 cm tall).Her family moved a lot, and it was sometimes difficult for her to attend ballet classes.But Copeland loved dancing and did not want to give up.She stayed with her ballet teacher during the week and spent time with her family only at the weekend.This was a difficult life, but she worked hard and won her first national competition when she was fourteen years old.Copeland joined the American Ballet Theatre in 2000 and performed in many ballets over the next few years.In 2007, she became a solo(单独的)performer, and in 2015 she became its principal dancer.Copeland is now a dancer, author and Broadway performer.She also stars in the 2015 film A Ballerina's Tale.So what's next? According to Copeland, anything is possible: “My career(职业)really is just now beginning.' 64.How old was Copeland when she became the principal dancer? A.13 B.14 C.25 D.33 65.Why was it difficult for Copeland to attend ballet classes? A.Because her family moved a lot.B.Because she was not a good dancer.C.Because she had no invitation letter.D.Because she had the wrong body type.66.Which of the following is TRUE according to the passage? A.Copeland became successful because of the advertisement.B.Copeland had to spend a lot of time away from her parents.C.Copeland won her first national competition as a solo performer.D.Copeland has ended up her career as an actress on Broadway.67 What's the writer’s opinion of Copeland?

A.Copeland sets an example who never gives up.B.Copeland was too old to start ballet at thirteen.C.Copeland has made her achievements by accident.D.Copeland was lucky to get support from the ballet school.C

Many people say dolphins are intelligent.They seem to be able to think, understand and learn things quickly.But are they as smart as humans, or are they more like cats and dogs? Dolphins use their brains quite differently from the way humans do.But scientists say dolphins and humans are very similar in some ways.How? Like humans, every dolphin has its own ”name“.The name is a special whistle(哨声).Each dolphin chooses a specific(特有的)whistle for itself, usually by its first birthday Dolphins are like people in other ways, too.They ”talk“ to each other about a lot of things-such as their age, their feelings, and finding food.They also use a system of sounds and body language to communicate.Understanding dolphin conversation is not easy for humans.No one ”speaks dolphin“ yet, but some scientists are trying to learn.Dolphins are also social animals.They live in groups called pods, and they often join others from different pods to play games and have fun--just like people.Scientists believe playing together is something only intelligent animals do.Dolphins and humans are similar in another way: both species make plans for getting things they want.In the seas of southern Brazil, for example, dolphins use an intelligent plan to get food.When there are fish near a boat, dolphins signal(发信号)to the fishermen to put their nets in the water.Using this method, the men can catch a lot of fish.Why do dolphins help the men? There is an advantage for them they get to eat some of the fish that escape(逃脱)from the net.68.What is a dolphin's “name”? A.It is a kind of game.B.It is a body sign.C.It is a dolphin’s age.D.It is a specific sound.69.What does the underlined word ”others“ refer to? A.Other fishes.B.Other people C.Other dolphins D.Other games 70.What can we infer from the passage? A.Some scientists can understand dolphins system of sounds.B.Dolphins probably help fishermen by using their body language.C Humans join dolphins' groups to get things we want.D Dolphins can talk to humans about their age and their feelings.71.What's the main idea of the passage? A.Dolphins can communicate with each other at birth.B.Dolphins are social animals because they play together.C.Dolphins are smart and are like humans in some ways.D.Dolphins help humans do many things like catching fish.D

Every year on 15th October, over 200 million people around the world take part in Global Handwashing Day.But why do we have a day for something we do all the time? Well, research shows that not enough people often wash their hands with soap.Experts believe that this leads to the deaths of millions of people every year.Sidibe, a public health expert says soap is the most beautiful invention in public health'.Washing your hands with soap can have a huge impact on reducing(减少)the spread of diseases.Handwashing with soap prevents babies from getting ill and keeps children healthy and in school.However, washing hands with soap does not happen as often as you might think.This is partly because there aren't enough resources(资源)in poorer countries, but it's also because for many people, handwashing is simply not part of their everyday life.It's not easy to get people to change habits they learned in early childhood--but this is what Global Handwashing Day wants to do.In 2008, the Indian cricket team joined around 100 million Indian schoolchildren in washing their hands to promote(促进)the first ever Global Handwashing Day.Every year since then, many different events have been held around the world.In 2014.Global Handwashing Day was used in the fight against Ebola, a very serious disease, with events held in affected(受感染的)African countries.Today, local and national leaders continue to use the day to spread the message about the importance of clean hands.The hope is that handwashing becomes a necessary part of people's lives and improves the health of millions around the world.72.Who started Global Handwashing Day? A.Public health experts.B.The Indians.C.African schoolchildren.D.Government leaders.73.What does the underlined word ”impact" mean? A.Danger.B.Influence.C.Background.D.Problem.74.What's the main idea of the last paragraph? A.Washing hands with soap is good for public health.B.Washing hands with soap doesn't become part of people's lives.C.People are holding many different events to fight against diseases.D.People all over the world are encouraged to wash hands with soap.75.What would be the best title for the passage? A.Learning to Use Soap.B.Fighting Against Diseases.C.Living a Healthy Life.D.Changing Your Habits.B)请先阅读下面短文,掌握其大意然后根据短文内容从下面方框内的七个选项中选择五个还原到文中,使短文意思通顺、结构完整,并在答题卡上将其序号涂黑。(每小题2分)Is there a connection between music and language? According to recent studies, the answer is yes: 76 Here, we look at two examples A recent study by researcher Kraus shows that playing a musical instrument can improve a person's hearing ability.77 The people in the first group were musicians, while those in the second group had no musical training.The musicians were able to hear the talking person more clearly.78 Think about violinists in an orchestra(管弦乐团).When the violinists play with the group, they hear their own instrument and many others, too.But the violinists must listen closely to what they are playing, and pay no attention to the other sounds.In this way, musicians are able to focus on certain sounds, even in a room with lots of noise.Schlaug, a doctor at Harvard Medical School, works with stroke(中风)patients.Because of their illness, these people cannot say their names, addresses, or other information normally.However, they can still sing.79 Why does this work? Schlaug isn't sure.Music seems to make different parts of the brain work, including the damaged(损坏的)parts.This might help patients to use that part of the brain again.Music improves concentration(注意力), memory, listening skills, and our overall language abilities.80 Playing an instrument or singing can help us do better in school and keep our brain sharp(敏锐的)as we get older.Music is not only enjoyable, it's also good for us in many other ways.A.It can even help sick people get better.B Music helps people solve some hearing problems.C.Music improves certain language abilities in the brain.D.The violinists develop their memories by playing the violin.E Musicians hear better because they learn to pay attention to certain sounds.G.In his study two groups of people listened to a person talking in a noisy room.五、补全对话(5分)请阅读下面对话,根据对话内容从方框中选择恰当的句子填入空白处,使对话通顺、合理，意思完整,并在答题卡上将其序号涂黑。(每空一句,每小题1分)(Sandra and Luke plan their trip to Cape Town.S=Sandra L=Luke)S:OK,that' s the flight(航班).Let’s look for a hotel now.81 L: Three nights--Friday, Saturday and Sunday.Are there any hotels near the airport? S: Yes, there are.But they are expensive.Just a minute… no, there aren't any cheap hotels near the airport.They are all expensive.82 L: Wow!Well, what about a youth hostel(青年旅社)? Is there a youth hostel near the airport? S: OK, let's see.I don't think so no, there isn't.I don't like youth hostels.83 L: OK.Let’s look in the city centre.Are there any cheap hotels there? S: Yes, of course there are L: Well, that's good.And is there a bus to the city centre? S: A bus from the airport? Yes, there is.84 There isn't a train, but that's OK.L: And there are taxis, too.S: 85 OK, so let's look at these hotels.A.I think the bus is fine.B.We need a room for two.C.Do you like a youth hostel? D.Is it for two nights or three? E.They aren't very comfortable.F.There's a bus every twenty minutes.G.This one is four hundred dollars a night.六、书面表达(15分)假如国外中学生来你校进行为期一周的交流学习,期间计划参加一项中国传统文化的主题活动,为此向你们征求活动方案(plan)请你根据下面表格中的信息提示,写一篇英语短文,介绍你提供的活动方案,内容包括:茶或者民乐介绍,活动安排以及与之相关的理由。要求:1.从表格中任选一个主题,合理安排活动;2.短文条理清楚,行文连贯,内容可适当发挥;3.短文中不能出现真实的人名和地名;4.词数不少于80,开头和结尾已给出,不计入总词数。Chinese Culture Introduction Schedule Reasons Tea Past and present Time:______ Places: tea farm, tea house Activities: 1.tea processing 2.a tea art performance … Folk Music Music pieces and traditional instruments Time:_______ Places: music room, school hall Activities: 1.take musical instrument classes 2.attend a folk music concert …

Hello, friends.I've got a plan for you which may help you learn about Chinese culture.First of all, I'd like to introduce _________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ Hope you will have a good time.2018年江西中考英语试题及答案

二、单项填空(共8小题,每小题1分,共8分)28-31 DDBC 32-35 DABC

三、完形填空(共25小题,每小题1分,共25分)A)36-40 BADBC 41-45 CACAD 46-50 ABBCC B)51.interesting 52.different 53.life 54.to know 55.signs 56.and 57.back 58.found 59.they 60.really

四、阅读理解(共20小题,每小题2分,共40分)61-63 CBD 64-67 DABA 68-71 DCBC 72-75 BBDA 76-80 CGEFA

五、补全对话(共5小题,每小题1分,共5分)81-85 DGEFA

六、书面表达(15分)Possible Version One: Hello, friends.I've got a plan for you which may help you learn about Chinese culture.First of all, I'd like to introduce tea.It has a long history.It is said that Shen Nong discovered it as a drink.Tea is one of the most popular drinks in China.So we will have some interesting activities about it for you.On Saturday morning, you are going to visit a big farm where you can learn about tea processing.On Saturday afternoon, you are going to a tea house after dinner where you can watch a tea art performance.Why do we plan a visit to a tea house for you? Because you can lean a lot more about tea culture there.You will see a young lady in a Chinese traditional dress who shows you how a cup of tea is made with tea sets, You can enjoy it and relax yourselves while listening to pieces of traditional folk music.Hope you will have a good time.Possible Version Two: Hello, friends.I've got a plan for you which may help you learn about Chinese culture.First of all, I'd like to introduce Chinese folk music.We have many famous pieces of music such as Jasmine Flowers and Gaoshan Liushui.We have erhu, dizi and many other different musical instruments.So we will have some interesting activities about it for you.You are going to talk musical instrument classes on Friday afternoon and our music teachers are going to teach you how to play musical instruments in the music rooms.On Saturday night, you are going to attend a folk music concert in the school hall.Why will we hold a concert for you? There are talented students from our school who can play very well.It's a good chance for you to enjoy the beauty of some famous pieces of folk music and you will surely lose yourselves in them.Hope you will have a good time.

第五篇：江西历年中考数学试题及答案

2011江西中考数学答案>>

江西省2012年中等学校招生考试数学学科 真题试卷(WORD含答案）考生须知：

1.全卷共 六页，有六大题，24小题.满分为120分.考试时间120分钟.2.本卷答案必须做在答题纸的对应位置上，做在试题卷上无效.温馨提示：请仔细审题，细心答题，相信你一定会有出色的表现！

一、选择题(本大题共有6小题，每小题3分，共18分。请选出各题中一个符合题意的正确选项，不选、多选、错选，均不给分)1.－1的绝对值是（）

A．1 B．0 C．－1 D．±1 故应选A．

－1 0 1 2．等腰三角形的顶角为80°，则其底角为（）A．20° B．50° C．60° D．80° 故应选B．

3．下列运算正确的是（）A． + = B． ÷ = C． × = D． =

故应选D．

⒋如图，有 三户家用电路接入电表，相邻的电路等距排列，则三户所用电线（A． 户最长 B．b户最长 C．c户最长 D．三户一样长

（第四题）

b c）⒌如图，如果在阳光下你的身影方向为北偏东60°的方向，那么太阳相对于你的方向是（）A．南偏西60° B．南偏西30° C．北偏东60° D．北偏东30° N（第五题）

S 故应选A．

⒍某人驾车从A地上高速公路前往B地，中途服务区休息了一段时间。出发时油箱存油40升，到达B后剩余4升，则从出发到达B地油箱所剩的油y(升)与时间t（h）之间的函数大致图像是（）www.xkb1.co m y y 40 40

二、填空题（本大题共8个小题，每小题3分，共24分．）⒎一个正方体有 六 个面。⒏当 时，的值是 ．

9.如图，经过⊙O的圆心O，AB与⊙O相切与点B，若∠A=50°，则∠C= 20 度．

⒑已知关于 的一元二次方程 有两个相等的实数根，则m的值是-1 ． ⒒已知 , ,则 5 ．

⒓已知一次函数 经过(2,－ 1)，（－ 3,4）两点，则其图像不经过第 三 象限。：解：（第十二题）

；图像经过一，二，四象限，不经过第三象限。

⒔如图，已知正五边形ABCDE，仅用无刻度的直尺准确作出其一条对称轴。（保留作图痕迹）

A M（第十三题）

⒕如图，正方形ABCD与正三角形AEF的顶点A重合，若将 绕其顶点A旋转，在旋转过程中，当BE=DF时，则∠BAE的值是 15°，165° ．

①(第十四题)②

三、解答题（本大题共4个小题，每小题6分，共24分．解答应写出文字说明、证明过程或演算步骤．）⒖（1）化简： 解：= =

⒗（1）.解不等式组： ①，② 解：由①，②可得 综合可知解集为。数轴表达：-1 0 2（第十六题）

⒘如图，两个菱形◇ABCD，◇CEFG，其中点A，C ,F在同一直线上，连接BE,DG.(1).在不添加辅助线时，写出其中两组全等三角形；（2）.证明BE=DG。G 解(1).可知 D ，(2).①连接BD,CE.则AF垂直且平分BD和GE。

点D与点B；点G与点E均关于直线AF对称，便可得 A C F BE=DG。（轴对称图形对应点的连线段相等）

②∵菱形的对角线平分一组对角，且直线AF所形成的 B 角为180°，∴∠DCG=∠BCE，DC=BC,CG=CE E ∴(“SAS”), BE=DG。

⒙如图，有大小质地相同仅颜色不同的两双拖鞋（分左.右脚）共四只，放置于地板上。【可 表示为（A1.A2）,(B1.B2)】注：本题采用“长方形”表示拖鞋。

（1）.若先从两只左脚拖鞋中取一只，再从两只右脚拖鞋中随机取一只，求恰好匹配成一双相同颜色的拖鞋的概率。

（2）.若从这四只拖鞋中随机取出两只，利用树形图或表格列举出所有可能出现的情况，并 求恰好匹配成一双相同颜色的拖鞋的概率。解(1).可列树状图求解 ∵

A1 B1（第十八题）A2 B2 A2 B2 ∴P1（恰好匹配成一双相同颜色的拖鞋）=(2).① ∵

A1 A2 B1 B2 A2 B1 B2 A1 B1 B2 A1 A2 B2 A1 A2 B1 ∴P2（恰好匹配成一双相同颜色的拖鞋）= ②

A1 A2 B1 B2 A1 A1 A2 A1 B1 A1B2 A2 A2A1 A2 B1 A2B2 B1 B1 A1 B1 A2 B1 B2 B2 B2 A1 B2 A2 B2 B1 ∴P2（恰好匹配成一双相同颜色的拖鞋）= 四.（本大题共2小题，每小题8分共十六分。）

⒚如图，等腰梯形ABCD放置于平面直角坐标系中，已知 反比例函数的图像经过点C。（1）.求点C的坐标及反比例函数的解析式。

（2）.将等腰梯形ABCD向上平移m个单位长度，使得点B恰好落于双曲线上，求m的值。解(1).Ⅰ：可以过点C作 轴的平行线CH，则CH⊥ 轴。∵ 易证 ∴CH=DO=3,BH=AO;OH=4。∴点C的坐标为（4，3）； D 3 C Ⅱ：可以设反比例函数的解析式为 E ∵反比例函数的图像经过点C，∴k =4×3=12;-2 A 0 H B 6

解析式为

（2）.（第十九题）

∵可知，随着等腰梯形沿着 轴正方向平移，始终保持与原图形全等形，即OB的长度不会变化。∴平移后点B的对应点为图中的点E，其坐标为（6,2），m的值为2.⒛小华写信给老家的爷爷，问候“八一”建军节。折叠长方形信纸装入标准信封时发现：若将信纸如图①连续两次对折后，沿着信封口边线装入时，宽绰有3.8cm；若将信纸如图②三等分折叠后，宽绰1.4cm，试求信纸的纸长和信封的口宽。

图②（第二十题）解(1).本题可列出方程求解。

设：信纸的纸长为，信封的口宽为（cm）.信纸的纸长为28.8cm, 信封的口宽为11cm.五.（本大题共2小题，每小题9分，共18分）。

21.我们约定：如果身高在选定标准的±2%范围之内都称为“普通身高”。为了解某校九年级男生具有“普通身高”的人数，从该校九年级男生中随机挑选出10名男生，并分别测量其身高（单位：cm），收集整理如下统计表：

（第二十一题）男生

序号 ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩

身高

（cm）

163 171 173 159 161 174 164 166 169 164 根据以上表格信息，解答如下问题：

（1）.计算这组数据的三个统计量：平均数，中位数和众数；

（2）.请选择其中一个统计量作为选定标准，找出这十名男生中具有“普通身高”的男生是哪几位，并说明理由。

（3）.若该年级共有280名男生，按（2）为选定标准，请估计该年级男生中具有“普通身高”的男生有多少名？

解(1).平均数=（163+171+173+159+161+174+164+166+169+164）× 166.4cm；

中位数=（164+166）÷2=165cm（注意：求中位数应将原数据由大至小排列，若数据为偶数个，应取最中间的两数的平均数；若数据为奇数个，仅须取最中间的数即可。）（2）.我们这里以统计量中的平均数为例，则“普通身高”的男生范围是：（1-2%）×166.4~（1+2%）×166.4即163.072≦ ≦169.728cm;因此⑦⑧⑨⑩名男生具有“普通身高”。（3）.我们这里以统计量中的平均数为例，则该年级男生中具有“普通身高”的男生人数： 280×（4÷10）=112名。

22.如图，小红家的阳台上放置了一晾衣架，图①为其侧面示意图，立杆AB，CD相交于点O，B,D两点立于地面，经测量AB=CD=136cm,OA=OC=51cm,OE=OF=34cm,现将晾衣架完全稳固张开，扣链EF成一条线段，且EF=32cm.(1).求证AC∥BD；

（2）.求扣链EF与AB的夹角∠OEF的度数；（精确至0.1°）

（3）.小红的连衣裙晾总长为122cm，垂挂到晾衣架上是否会拖落至地，请通过计算说明理由。

B D 解：(1).①从三角形有关性质的角度解题：证明：∵OA=OC,OB=OD,且∠AOC=∠BOD(对顶角相等);∠B=∠D,∠C=∠A(等边对等角)，∴∠B=∠D=∠C=∠A（等量代换）∴AC∥BD（内错角相等，两直线平行）②从相似三角形的角度解题：∵可易证△AOC～△BOD(两组对边成比例且夹角相等的三角形相似)∴∠B=∠D,∠C=∠A；∴AC∥BD。（2）.可构造直角三角形，再运用三角函数解答。如图，过点O作EF边的垂线。∵△OEF为等腰三角形OK⊥EF，∴EK=FK=16cm（“三线合一”）,OE=34cm ∵ cos∠OEF= ,∠OEF。

（3）.可过点A作BD边的垂线段AH①∵可易证△OEK∽△ABH, ∴AH ②∵AH等于等腰△OBD，△OAC两底边的高线之和，∴AH ∵AH <122cm∴垂挂到晾衣架上会拖落至地.六.（本大题共2小题，每小题10分，共20分）

23.如图，已知二次函数 与 轴交与A,B两点（点A在点B的左边），与 轴交与点C。（1）.求A,B两点的坐标：（2）.二次函数，顶点为点P ① 直接写出二次函数 与二次函数 有关图像的两条相同性质；

②是否存在实数k使得△ABP为等边三角形，若存在，求出k值；若不存在，请说明理由。③若直线 与抛物线 交与E,F两点，问EF的长度是否会发生变化，若不会变化，求出EF的值；若会发生变化，请说明理由。

图一 图二

解（1）.依照题意，求抛物线与 轴的交点坐标，可将原二次函数表达式 转化成其交点式即，则点A,B的坐标分别为（1，0）；（3,0）。（2）.Ⅰ.同理 转化成其交点式即

则二次函数 与二次函数 有关图像的两条相同性质可以是：①抛物线均经过点A（1,0）与点B（3，0）；②抛物线的对称轴均为直线。新 课标 第 一网 Ⅱ.存在。∵抛物线 其顶点必在直线 即点P的横坐标为2.如图一，当点P位于第一象限时，可过点P作AB边的垂线段PM。PM=tan60°×（2÷2）=

此时点P为（2，），则，k=-

如图一，当点P位于第四象限时，可过点P作AB边的垂线段PN。PN= tan60°×（2÷2）=

此时点P为（2，-），同理，k= Ⅲ.不会发生变化。

如图二，∵抛物线 其顶点必在直线 即点P的横坐标为2.若 直线 与抛物线 交与E,F两点，则有

∴EF恒等于6.24.已知，纸片⊙Ｏ的半径为2，如图1.沿着弦AB折叠操作。（1）.如图2，当折叠后的⌒AB 经过圆心Ｏ时，求⌒AB 的长度；

（２）．如图３，当弦ＡＢ＝２时，求折叠后⌒AB 所在圆的圆心Ｏ’到弦ＡＢ的距离；（３）．在如图１中，将纸片⊙Ｏ沿着弦ＣＤ折叠操作：

①如图４，当ＡＢ∥ＣＤ时，折叠后的⌒ＣＤ 和⌒AB 所在圆外切与点Ｐ时，设点Ｏ到弦ＣＤ，ＡＢ的距离之和为ｄ，试求ｄ的值；

②如图５．当ＡＢ与ＣＤ不平行时，折叠后的⌒ＣＤ 和⌒AB 所在圆外切与点Ｐ,点Ｍ,Ｎ分别为ＡＢ，ＣＤ的中点

试探究四边形ＯＭＰＮ的形状，并证明。

Ｂ

图1.Ｂ 图2． 图３．

图４．B Ｃ F 图５．L L D 解：（1）.可以过点Ｏ作OE垂直于弦AB，并连接AE,BE,BO,AO;由图形的对称性可知四边形AEOB为菱形◇，△AEO,△BEO均为等边三角形，∠AOB=120.⌒AB = ；

（2）.折叠后的圆Ｏ’与圆Ｏ是等圆，设折叠后⌒AB 所在圆的圆心Ｏ’到弦ＡＢ的距离为m.可过Ｏ’作AB的垂线段即为m.。m=tan60°×1=

（3）.可作AB垂线，交圆与点E,点G，且经过点P，EF必定垂直且平分AB，CD。GE=GP;HP=HF；距离之和为ｄ=（GE+GP+HP+HF）÷2=4÷2=2.（4）.可设点K,点L分别是⌒APB，⌒CPD 所在圆的圆心，连接KL。

∵折叠后⊙K，⊙O,⊙L均是等圆

∵点K与点O;点L与点O是分别关于AB,CD的对称点，∴点M,点N分别是OK,OL的中点；

连心线KL必定经过外切点P；点M,N,P分别是△KOL三边的中点。∴MP=NO= =OL;MP∥OL;∴四边形OMPN为平行四边形。