安徽省合肥市46中2018-2019学年九年级段考(一模)
2019-2020学年安徽省合肥四十六中九年级(上)第一次段考化学试卷

2019-2020学年安徽省合肥四十六中九年级(上)第一次段考化学试卷一、选择题(共10题,每小题2分,总计20分):(每小题只有一个正确选项符合题意)1.(2分)如图所示活动体现了我国古代劳动人民的勤劳和智慧。
其中涉及化学变化的是()A.织布B.耕田C.生火D.灌溉2.(2分)下列关于空气成分和性质的说法正确的是()A.常见的空气污染物有一氧化碳、二氧化氮、二氧化碳、可吸入颗粒物等B.带火星的木条一定能在有氧气的集气瓶中复燃C.氮气化学性质稳定,因此可以做氮肥D.石灰水表面产生一层白膜,说明空气中含有二氧化碳3.(2分)下列实验操作正确的是()A.滴加液体B.检查气密性C.量取液体D.称量固体4.(2分)我国是今年“世界环境日”活动主办国,保护环境,人人有责。
下列做法错误的是()A.购物时,用布袋代替塑料袋B.提倡步行、骑自行车等“低碳”出行方式C.办公时,提倡纸张双面使用D.禁止化石燃料的使用、开发新能源、植树造林5.(2分)下列选项符合图示从属关系的是()A B C Dx混合物化合反应可燃物溶解性Y物质氧化反应红磷化学性质A.A B.B C.C D.D6.(2分)下列物质在氧气中燃烧的现象的描述,正确的是()A.镁条在氧气中剧烈燃烧,发出耀眼的白光,生成白色固体B.细铁丝伸入氧气瓶中火星四射C.木炭燃烧生成二氧化碳,倒入瓶中的澄清石灰水变浑浊D.硫燃烧发出淡蓝色火焰,放热,生成有刺激性气味的气体7.(2分)下列有关加热操作的说法,正确的是()A.蒸发皿需要垫上石棉网加热B.试管、烧杯、烧瓶、蒸发皿都可以盛放液体加热C.加热后试管立即用冷水清洗D.不能向燃着的酒精灯内添加酒精,灯内的酒精量不得超过酒精灯容积的8.(2分)用托盘天平称量5.0g药品,当天平的指针向右偏时,应该进行的操作是()A.增加砝码B.减少砝码C.增加药品D.减少药品9.(2分)在探究我们吸入的空气和呼出的气体有什么不同的活动中,其中有一操作如图,则该操作说明该气体是()A.极易溶于水B.不易溶于水C.易溶于水D.与气体是否溶于水无关10.(2分)下列实验指定容器中的水,其解释没有体现水的主要作用的是()A B C D实 验 装 置硫在氧气中燃烧测定空气中氧气含量铁丝在氧气中燃烧排水法收集氢气解释 集气瓶中的水: 吸收放出的热量量筒中的水:通过水体积的变化得出O 2体积集气瓶中的水:冷却溅落融熔物,防止集气瓶炸裂集气瓶中的水:水先将集气瓶内的空气排净,后便于观察CH 4何时收集满 A .AB .BC .CD .D二、填空题(共40分)11.(4分)有下列物质:①氧气②氮气③二氧化硫④过氧化氢⑤氖气⑥冰水混合物⑦人呼出的气体⑧石灰水⑨二氧化氮⑩液化空气;(1)属于混合物的是: (用序号来表示)。
2018年合肥市包河区46中南校八年级上第一次段考

∴当 x=50 时,取得最省运费 y=1280
∴甲地运往 A 棚 50 吨,运往 B 棚 0 吨,
乙地运往 A 棚 20 吨,运往 B 棚 60 吨。
8
B. 4
3. 过 A(4,2) 和 B(2,2) 两点的直线一定(
C. 3 )
D. 3
A. 垂直于 x 轴 B.与 y 轴相交但不平行于 x 轴 C.平行于 x 轴
D.与 x 轴、 y 轴平行
4. 若 y=x 2 b 是正比例函数,则 b 的值是(
)
A. 0
B. 2
C. 2
5.若函数 y kx b 的图像如图所示,那么当 y 0 时, x 的取值范围是(
16. 安徽某中学组织学生举行“创建文明城市”宣传活动,从学校坐车出发,先上坡到达 A 地后,宣传 8
分钟;然后下坡到 B 地宣传 8 分钟返回,行程情况如图。若返回时,上、下坡速度仍保持不变,在 A 地仍
要宣传 8 分钟,那么他们从 B 地返回学校用的时间是
三、解答题(本大题共 6 小题,共 52 分) 17. (8 分)如图,方格纸中的每个小方格都是边长为 1 个单位长度的正方形,建立平面直角坐标系后 ABC 的顶点均在格点上。 (1)写出点 A、B、C 的坐标 (2)画出 ABC 向上平移 3 个单位,向左平移 5 个单位得到的 A1B1C1 的图像 ,并写出顶点坐标; (3)求 SABC .
)
A. y1 y2
B. y1 y2
C. y1 y2
D. 无法确定
8. 已知一次函数的图像与直线 y x 1 平行,且过点 (8, 2) ,那么此一次函数的解析式为( )
A. y 2x 14
B. y x 6
C. y x 10
安徽省合肥市重点中学2018年中考一模数学试卷及参考答案

】
菠萝
A
B
C
D
E
去皮前
1.1kg
1.3kg
1.8kg
1.3kg
2.0kg
去皮后
0.7kg
0.9kg
1.2kg
0.8kg
1.4kg
A. 0.7a
B. 1.1a
C. 1.5a
D. 2a
10.如图,矩形 ABCD 中,O 为对角线 AC 的中点,点 P、Q 分别从 A
和 B 两点同时出发,在边 AB 和 BC 上匀速运动,并且同时到达终
7.一副直角三角板按如图所示的方式摆放,其中点 C 在 FD 的延长线上,且 AB∥FC,则∠CBD
的度数为【
】
A. 15°
B. 20°
C. 25°
D. 30°
第 7 题图
第 8 题图
8.如图,平面直角坐标系中的二次函数图象所对应的函数解析式可能为【
】
A. y 1 x2 B. y 1 x 12
21. (满分 12 分)已知:如图,AB 为半圆的直径,O 为圆心,OC⊥AB,D 为 BC 的中点,连
接 DA、DB、DC,过点 C 作 DC 的垂线交 DA 于点 E,DA 交 OC 于点 F. (1)求∠CED 的度数;(2)求证:AE=BD;(3)求 AO 的值.
OF
22. (满分 12 分)为了迎接“六一”儿童节的到来,某校七年级进行集体跳大绳比赛.如图所示, 跳绳时,绳甩到最高处时的形状可看作是抛物线的一部分,记作 G,绳子两端的距离 AB 约为 8 米,两名甩绳同学拿绳的手到地面的距离 AC 和 BD 基本保持 1 米,当绳甩到最低点时刚好擦过 地面,且与抛物线 G 关于直线 AB 对称.
安徽省合肥市四十六中学2018-2019年九年级下学期开学物理试卷(无答案)

安徽省合肥市四十六中学2018-2019年九年级下学期开学物理试卷(无答案)1 / 5安徽省合肥市四十六中学2018-2019学年九年级下学期开学物理试卷一、填空题(本大题共8小题,共26.0分)1. 用电火花发生器点燃塑料盒内的酒精气体能将盒盖喷出很远,如图所示。
此过程中的能量转化方式与汽油机的______冲程相类似,实验时在盒内滴入0.2g 酒精,这些酒精完全燃烧放出的热量是______J .(q 酒精=3×107J /kg ) 2. 人体中电流超过30mA 时将会造成生命危险。
若某人身体的电阻为1100Ω,则他的安全电压是______V 。
3. 用均匀的电阻丝围成一个正方形ABCD ,如图所示,其中E 为CD 的中点。
当B 、D 两点接入电路中时,阻值为8Ω;那么将B 、E 两点接入电路时,阻值为______Ω。
4. 如图所示是家庭常用的电能表,此时电能表指示的读数为______kW •h ,5min 该电能表的表盘转过25圈,此时该家庭电路的电功率是______W5. 一台电动机的额定电压是220V ,其电阻是1Ω.正常工作时,通过的电流为5A ,则电动机消耗的功率为______W ,正常工作100s 产生的热量为______。
6. 某型号电饭锅有高温档和低温档两个档位,其原理如图所示,若已知电阻R 0=44Ω,R =2156Ω,则当开关置于______ (选填“1”或“2”)位置时为高温档,当电饭锅以高温档正常工作10min 消耗的电能为______ J .7. 如图所示,弹簧下悬挂一块条形磁体,磁体下方有一电磁铁,闭合开关后,为使弹簧伸长,滑动变阻器滑片P 向______(“左”或“右”)端移动。
8. 小青同学想在家里安装一盏照明灯,如图所示是他设计的电路。
图中虚线框1和2应连入开关和电灯;则开关应装在______虚线框中(选填“1“或“2”)。
安装完毕后,用一只额定电压为220V 的灯泡L 0(检验灯泡)取代保险丝来检查新安装的照明灯是否正常,闭合开关后,发现灯泡L 0发光呈暗红色,则说明安装的照明灯______(选填“正常”“断路”或“短路”)二、单选题(本大题共7小题,共21.0分)9.如图所示的四个物态变化中,属于吸热的是()A. 春天,冰雪消融B. 夏天,露珠晶莹C. 秋天,白雾弥浸D. 冬天,霜满枝头10.下列关于温度、内能和热量三者的关系说法正确的是()A. 物体吸收了热量,温度一定升高B. 物体温度升高,内能一定增加C. 物体温度升高,一定吸收了热量D. 温度高的物体,内能一定大11.把用餐巾纸摩擦过的塑料吸管放在支架上,吸管能在水平面自由转动。
2019-2020学年度第二学期安徽省合肥 46 中九年级数学一模考试卷(PDF 含答案)

②方程 ax2 + bx + c = 3 有两个相等的实数根; ③抛物线与 x 轴的另一个交点是 (−1,0) ;
④当1 x 4 时,有 y2 y1 ; ⑤ x(ax + b) a + b ,
其中正确的结论有几个 ( )
A.1 个
B.2 个
C.3 个
D.4 个
10.如图,直线 l1∥l2∥l3 , A , B , C 分别为直线 l1 , l2 , l3 上的动点,连接 AB , BC , AC ,线段 AC 交直线 l2 于点 D .设直线 l1 , l2 之间的距离为 2,直线 l2 , l3 之间的距离为 3,若 ABC = 90 ,则 BD 的最 小值为 ( )
2
13.如图.在等边△ABC 中, AC = 8 ,点 D 、 E 、 F 分别在三边 AB 、 BC 、 AC 上,且 AF = 2 , FD ⊥ DE , DFE = 60 ,则 AD 的长为________.
14.如图,点 P 是矩形 ABCD 的对角线 AC 上的一点(异于两个端点), AB = 2BC = 2 ,若 BP 的垂直平分 线 EF 经过该矩形的一个顶点,则 BP 的垂直平分线 EF 与对角线 AC 的夹角(锐角)的正切值为_______. 三.解答题(共 6 小题)
A. 5 3
B. 12 5
C. 10 3
D. 5 2
二.填空题(共 4 小题,每小题 5 分)
11.不等式组
2x −1>0 3x<2x +
2
的整数解为________.
12.如图, △OAB 是等边三角形,且 OA 与 x 轴重合,点 B 是反比例函数 y = − 4 3 图象上的点,则 x
安徽省合肥市第46中2018-2019学年第一学期九年级数学期末考试卷(含解析)

安徽省合肥市第四十六中2018-2019学年第一学期期末考试九年级数学(满分150分 考试时间120分钟)一、选择题(本大题共10小题,每小题4分,满分40分)1. 二次函数2x y =的图象向右平移3个单位,得到新的图象的函数表达式是( ▲ )A. 3+=2x yB. 3-2x y =C. 23)(+=x yD. 2)3-(x y =2. 如图,一个小球由地面沿着坡度i=1:2的坡面向上前进了10m ,此时小球距离地面的高度为( ▲ )A. 5mB. 310m C. 54m D. 52m 3. 已知二次函数)(012≠+=a b x a y -)(有最小值1,则b a ,的大小关系为( ▲ )A. b a >B. b a <C. b a =D. 不能确定4. 如图,已知⊙O 是正方形ABCD 的外接圆,点E 是弧AD 上任意一点,则∠BEC 的度数为( ▲ )A. 30°B. 45°C. 60°D. 90°5. 如图,在△ABC 中,已知∠ADE=∠B ,则下列等式成立的是( ▲ )A. =B. =C. =D. =第4题 第5题 第6题 第7题6. 如图,在Rt △ABC 中,∠ACB=90°,CD ⊥AB 于点D ,CD=2,BD=1,则AD 的长是( ▲ )A. 1B. 2C. 2D. 4 7. 如图,在△ABC 中,AB=AC=13,BC=10,点D 为BC 的中点,DE ⊥AB 于点E ,则tan ∠BDE 的值等于( ▲ )A.1310 B. 1013 C. 125 D. 5128. 在一个可以改变容积的密闭容器内,装有一定质量m 的某种气体,当改变容积V 时,气体的密度p 也随之改变,ρ与V 在一定范围内满足ρ=vm ,它的图象如图所示,则该气体的质量m 为( ▲ ) A. 1.4kg B. 5kg C. 7kg D. 6.4kg9. 已知二次函数c x x y ++=2的图象与x 轴的一个交点为),(02,则它与x 轴的另一个交点坐标是( ▲ )A. ),(01B. ),(01-C. ),(02D.),(03- 10. 小阳在如图①所示的扇形舞台上沿O ﹣M ﹣N 匀速行走,他从点O 出发,沿箭头所示的方向经过点M 再走到点N ,共用时70秒.有一台摄像机选择了一个固定的位置记录了小阳的走路过程,设小阳走路的时间为t (单位:秒),他与摄像机的距离为y (单位:米),表示y 与t 的函数关系的图象大致如图②,则这个固定位置可能是图①中的 ( ▲ )A. 点QB. 点PC. 点MD. 点N二、填空题(本大题共5小题,每小题4分,满分20分)11. 抛物线5122+=)-(x y 的顶点坐标是 。
2018-2019年上学期安徽省合肥市46中九年级英语第一次段考试卷(无听力部分)

2018-2019年安徽省合肥市第四十六中第一次月考试卷(英语)一、单选题(10分)1.Her grandfather was a famous in Wangfu Restaurant. He can still make delicious dishes.A.writerB.teacherC.managerD.cook2.-Halloween brings children not only but also something bad.A.fearB.interestC.excitementD.pressure3.-Have you bought that digital camera?-No. I can’t afford it. The price is a bit too,I thinkA.lowB.highC.cheapD.experience4.To keep ,children have to obey the rules when they are home alone.A.healthy, safetyB.safe,safetyC.safety,safeD.health, healthy5.Helen has got two brothers. Of them likes chocolate, but she loves it.A.NeitherB.NoneC.EachD.Any6.-How can I get some about the 2016 Olympic Games?--Why not search the Internet.A.i nformationB.experienceC.practiceD.success7.Although the scientist is very great, he neverA.t akes offB.turns offC.shows offD.breaks off8.-May I go surfing alone this afternoon, Dad?--No, you . it is dangerous.A.May notB.can’tC.needn’tD.don’t9.--I haven’t seen your grandfather for serval years. Where has he gone?--Oh, he for two years.A.h as diedB.has been deadC.diedD.was died10.If he______, I_______swimming aloneA.doesn’t come, will goB.won’t come, will goC.will come, won’t goD.is coming, don’t go二、完形填空(1.5分x20)ALike many girls, I love going shopping a lot! but as a student, I don’t have a lot of (1) . I can’t (2) many beautiful clothes, especially when it comes to some newest clothes, which are in fashion(流行/时髦)at the moment. I like to look for things online, but I find it (3) to buy clothes online because they don’t always fit wel l when I get them. I always like to (4) clothes in the shop before I buy them —it makes each shopping trip much more fun!In some countries, they have shops called “charity(慈善)shops,” where people(5) their old clothes, shoes, books, CDs, DVDs, and children’s toys and games. I love these shops, because you can often find some cheap and (6) clothes with the tags(标牌)still on them.The only (7) for charity shopping is that you have to search through everything in the shop, which can (8) a lot of time. Also, sometimes it is disappointing —I have searched for hours before, but I didn’t find anything(9) ! But the (10) part about charity shopping is that the money you spend will be sent to the people who are in need. That way, you will get what you want and feel happy at the same time.(1) A. time B. money C. books D. toys(2) A. invent B. touch C. afford D. separate(3) A. useful B. possible C. fantastic D. difficult(4) A. get on B. try on C. put on D. try out(5) A. give away B. throw away C. take up D. clean up(6) A. new B. old C. big D. small(7) A. condition B. happiness C. advantage D. problem(8) A. bring B. waste C. provide D. save(9) A. buying B. selling C. to buy D. to sell(10) A. most B. least C. best D. worstBTraveling can be a good way to get life experiences. But what will you do if you're a student and don'thave enough money for a trip? Don't worry. Here are some useful suggestions.Plan ahead: Don't wait until the last minute to plan your trip, 1 you will have to spend more on tickets. Write down 2 you expect to spend on food and hotels. Make a plan and you can 3 much in this way.Find useful information: Travel books will 4 information about the cheapest hotels and restaurants.Also the Internet can help you save money. There are many famous 5 such as www. Travelcity. comand www. Economy travel, com.Travel in groups: Find someone who is interested in visiting the 6 places as you. By traveling with othersyou can 7 costs and experiences.Go to a less-known place: There places 8 not be expensive and too crowded. Smaller towns still have many interesting activities and sights. You can learn about lots of local customs, too.Pack necessary things: The most important things to take are not always clothes. Remember medicinebecause you may get 9 . Snacks are also necessary because they can save you much money when youcan not find a 10 restaurant. By planning carefully, you can not only enjoy traveling but also save lotsof money. You will remember your travel experiences all your life.1.A.and B.but C. or D.so2.A.how many B.how much C. how long D.how often3.A.spend B.waste C. save D.pay4.A.offer B.prepare C. suggest D.play5.A.library B.new C. book D.websites6.A.same B.different C. interested D.correct7.A.save B.cut C. increase D.share8.A.may B.should C. must D.need9.A.warm B.healthy C. excited D.sick10.A.expensive B.cheap C. new D.clean三、阅读理解(2分X20)ADisney Park in Florida is close to the beach. Here’s some advice for visiting Disney Park in Florida:★ You can purchase tickets online or at a Disney store.★ Free parking ( 停车 ). You can drive there if you like.★ Get to the park early or it will be crowded.★ Free drinking water! You just need to take your water bottle.★ If you love Disney characters visit before you go there. Then you can easily find where all the characters appear in the park.★ Lunch is usually served ( 供饭菜 ) until 3:45 pm. The money you need to pay depends on which character you would like to eat with.★ You can get into the park for free on your birthday.( )1. The underlined word “purchase” means “”.A. showB. checkC. buyD. sell( )2. The sixth piece of advice is about .A. playingB. eatingC. sleepingD. parking( )3. People can visit before going to the park so that they can easily find .A. drinking waterB. lunch tablesC. parking placesD. Disney characters( )4. Which of the following is TRUE?A. The park is far from the beach.B. People have to go to the park by boat.C. People cannot have lunch after 2:45 pm.D. The writer gives seven pieces of advice.BIf we want to deal with the association(社交) between boys and girls properly, here are some “dos and don’ts” for you to follow.Keep a normal and healthy state of mind. Our schools and classes are made up of boys and girls. It is very nature for the boys and girls to make friends with each other. We should make as manyfriends as possible. We should get on with t he other sex(性别) in public instead of in secret.Don’t be too nervous or too shy. If you are a shy person, you can also find a way out. First ofall, you can make frien d with the students who have the same interest and hobby as you. As both of you have much in common, you may have much to talk about. If you keep doing like that, littleby little, you will gladly find you are also as free to express yourself as others.Don’t fall into the ditch of early love. The boys and girls at a adolescence (青春期) are rich in feeling. They are easy to regard the friendship as a sign of love and fall in love with each other at an early age. Early love is a green apple that can’t be eaten. An apple won’t taste sweet until it is full ripe(成熟). Boys and girls at middle school are too young to carry the heavy duty of love. Do keep out of early love.1.The main idea of the passage is to _______.A. tell students to keep away from early loveB. give some advice on how to associate between boys and girlsC. tell students how to make friendsD. teach boys how to talk with girls2.We should get on with the other sex in following ways EXCEPT _______.A. with a good state of mindB. in real friendshipC. in publicD. in secret3. If you are a shy person, you can ________.A. find friends with the same interest and hobby firstB. only have a few friends of the same sexC. not make friends with the other sexD. not fall in love with other students easily4. What does the underlined word “ditch” mean?A. 波浪B. 泥潭C. 圈套D. 迷惑CWhat’s the most important thing for athletes (运动员) to win? Training hard? Having an excellent coach? Never giving up? Probably these are all very important, but according to a new book, the most important thing is getting enough sleep.This book is Sleep to Win! by Dr. James Maas and Haley Davis. In this book, you can find out howgetting more s leep helped fifteen-year-old Sarah Hughes win an Olympic gold medal. She said thebiggest change she mad e in her trai ning for the Olympics was getting more sleep. Sleep to Win! also gives examples of other professional athletes as well as student athletes becoming faster runners because of getting more sleep. For example, after Amber Way, a high school student in Michigan, changed her sleeping time from seven to over nine hours each night, her running speed increased a lot . She finally became the state champion (州冠军) after breaking five school records.Dr. Haley Davis explained, “Why is sleeping so helpful? The reason is that teenagers whose bodies are still growi ng need to get about 9.25 hours of sleep each night. That’s about two hours more than most American teenagers are getti ng. Enough sleep helps the brain work properly. While teenagers are sleeping, their brains are preparing for the next day.A good night’s sleep can help them pay attention, make decisions and be creative.”1.Who is an Olympic champion?A. Dr. James Maas.B. Dr. Haley Davis.C. Sarah Hughes.D. Amber Way.2.We can read many stories of ______ in Sleep to Win!A. young athletesB. the authorsC. hard-working studentsD. great coaches3.In America, most teenagers are getting about ______ hours’ sleep each night.A. 7B. 7.25C. 9D. 9.254. What do the authors of Sleep to Win! probably think is the most important thing for young athletes to win?A. Training hard.B. Having a good coach.C. Never giving up.D. Getting enough sleep.DWhen Juliet was a child she often went to the city park and played with her friends. On a sunny morning when Juliet came to the park with her mum she looked around and felt very unhappy.“What’s the matter dear?” asked her mum.Juliet replied “Mum there’s so much trash on the ground.”Juliet’s mum looked around. There was paper boxes and glass bottles everywhere.“What can we do?” asked Juliet.“I’m sure you will think of something ” said her mum.As soon as Juliet and her mum went home Juliet painted a picture of the park and wrote a sign in large black letters at the top of the picture. The sign read “PLEASE KEEP OUR PARK CLEAN”. Later she took plenty of bags and went back to the park with her mum. Juliet put up her picture on a big trash can(垃圾桶).“Will you help me pick up the trash Mum?” Juliet said as she handed her mum a bag.“I sure will ” replied her mum.The children at the park r an over to see what was going on. Juliet handed them each a bag. “Let’s clean this place up ” said Juliet. Then they began to pick up the trash talking and laughing. Soon all the bags were full.“We need to come back another day. There’s still some trash on the ground but the park looks much better ” said Juliet. Her mum said “So it does. I knew you would think of a way to help.”( ) 1. Why was Juliet sad?A. Because the weather was bad.B. Because she couldn’t find her mum.C. Because her friends were not at the park.D. Because there was too much trash at the park.( ) 2. Juliet put up the picture to ______.A. show off her painting skillsB. give her mum a big surpriseC. encourage people to keep the park cleanD. show people how beautiful the park was( ) 3. From the underlined sentence we can learn that Juliet’s mum ______.A. was proud of JulietB. was angry with JulietC. thought Juliet was lazyD. thought Juliet was difficult( ) 4. Which of the following is TRUE about the children?A. They laughed at Juliet.B. They had an awful and tiring day.C. They bought some bags from Juliet.D. They joined Juliet in picking up the trash.( ) 5. What’s the topic of the passage?A. A cleanup story.B. Juliet and her mum.C. A beautiful park.D. How to protect the environment.ERock climbing is a popular hobby that many people enjoy doing.You can do it indoors on special walls or outdoors on real mountains.There are many advantages of rock climbing-it is fun and it also helps people forget worries.The most important equipment(设备)to have is good shoes.They need to be half a size smaller than your usual size.The next thing you need is a harness(保护带).This allows you to move freely,but will hold you up if you fall.It's important to know how to use your equipment.If you are a beginner,it's best to have lessons.A climber with experience can help you a lot in the beginning.Rock climbing is very exciting for people of different ages.Climbers,however,must be careful not to pollute the environment.Sometimes rock climbers leave rubbish on the mountains where they climb.They should take it with them and throw it away.This will allow future climbers to enjoy a clean environment.1.What advantages does rock climbing have?(不超过10个词)2.What equipment does a climber need?(不超过10个词)3.How can climbers help protect the environment while climbing?(不超过15个词)补全对话(5分)Ann: Thank you for the birthday gift, Dad. It’s the best gift I have ever had.Dad: (1)Ann: I’ve always wanted a computer. (2)Dad: And you need it to chat(聊天)with your friends, too. Ann: I guess you are right. (3)Dad: Send an email? Er, just do like this. (4)Ann: Yes, Dad. I think it’s easy.Dad: (5)Ann: I won’t, I promise. A. Have you got it?B. Do you need help?C. I’m glad you like it.D. How can I turn it on?E. I need it to do my homework.F. Just don’t spend too much time on it.G. Could you show me how to send an email .根据课文意思完成以下练习(10分)(1). The clock rings so loudly that it will wake me up.(同义句转换)(2)Betty is home alone, but she can look after herself.(完成句子)_______Betty is home alone, she can look after herself.(3)Since then, people _________(celebrate)the National Day.(4)And my family always go somewhere interesting as soon as the holiday____(开始)(5)I got out of the car, went through a gate and _______(走)along a dark path.词汇题(5分)1.Double N_________ Festival (重阳节) is an important festival in China.2.The People’s Republic of China was f_________(创立) on 1st October,1949.3.The teacher went out and the class still r______(保持) quite.4.The wonders she is interested in i_________(包括) the Yellow Mountain and Terracotta Army.5.Everyone should save e________(电) and reduce pollution.如今,微信正深受人们的青睐,假如你是Lisa,上周你对你所在的中学进行了一次关于同学们使用微信的调查,请你以此写一份调查报告。
安徽省合肥市第46中学2018届九年级开学考数学试卷

绝密★启用前安徽省合肥市第46中学2018届九年级开学考数学试卷试卷副标题考试范围:xxx ;考试时间:63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、若,化简的结果为( ) A .B .C .D .2、如图,在同一直角坐标系中,一次函数和二次函数的图象大致为( )A .B .C .D .3、若将分式中的字母与的值分别扩大为原来的10倍,则这个分式的值( )A .扩大为原来的10倍B .扩大为原来的20倍C .不改变D .缩小为原来的倍4、函数(是常数)是二次函数的条件是( )A .B .C .D.5、关于的一元二次方程的一个根为0,则的值为( )A .1或B .1C .D .06、如图,在平行四边形中,下列结论中错误的是( )A .B .C .D .7、小华所在的八年级一班共有50名学生,一次体检测量了全班学生的身高,由此求得该班学生的平均身高是1.65米,而小华的身高是1.66米,下列说法错误的是( ) A .班上比小华高得学生人数不会超过25人 B .1.65米是该班学生身高的平均水平 C .这组身高数据中的中位数不一定是1.65米 D .这组身高数据的众数不一定是1.65米8、某种药品原价为36元/盒,经过连续两次降价后售价为25元/盒。
设平均每次降价的百分率为,根据题意所列方程正确的是( ) A . B .C .D.9、使用同一种规格的下列地砖,不能进行平面镶嵌的是( )A .正三角形地砖B .正四边形地砖C .正五边形地砖D .正六边形地砖10、七个边长为1的正方形按如图所示的方式放置在平面直角坐标系中,直线经过点且将这七个正方形的面积分成相等的两部分,则直线与轴的交点的横坐标为( )A .B .C .D .第II卷(非选择题)二、填空题(题型注释)11、在实数范围内分解因式_____________.12、如图,在中,边的垂直平分线分别交于于点,交于点,若的周长为8,则的周长为___________.13、函数是二次函数,当_____时,其图像开口向上;当时_____,其图像开口向下.14、如图,在平行四边形中,,是的中点,作,垂足在线段上,连接,则下列结论:①;②;③;④.其中一定成立的是________ (把所有正确结论的序号都填在横线上)三、计算题(题型注释)15、计算:16、解方程(用配方法解决)17、已知关于的一元二次方程有两个实根和.(1)求实数的取值范围; (2)当和是一个矩形两邻边的长且矩形的对角线长为,求的值.四、解答题(题型注释)18、如图所示,在正方形中,是的中点,是上一点,且.求证:.19、商场某种商品平均每天可销售30件,每件盈利50元。
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安徽省合肥市46中本部2018-2019学年九年级段考(一模)一、选择题(本大题共10小题,每小题4分,满分40分) 1、-3的相反数是( ) A.31 B.31- C.3 D.-3 2、下列运算正确的是( )A.43x x x =•B.32x x x =+C.226)3(x x = D.326x x x =÷3、2018年我国国民生产总值突破90万亿元,数据90万亿用科学记数法表示为( ) A.8109⨯ B.12109⨯ C.13109⨯ D.11109⨯ 4、如图所示的几何体是由五个小正方体组合而成的,它的主视图是( )A.B. C.D.5、一元二次方程x x x -=-3)3(的根是( )A.-1B.3C.1和-3D.3和-16、为防治雾霾,保护环境,合肥市掀起“爱绿护绿”热潮,经过两年时间,绿地面积增加了21%,设这两年绿地面积的平均增长率是x ,则列出关于x 的一元二次方程为( )A.%2112+=x B.%21)1(2=-x C.%21)1(2=+x D.%211)1(2+=+x7、如图,平行四边形ABCD 中,E ,F 分别为AD ,BC 边上的一点,增加下列条件,不一定能得出BE ∥DF 的是( )A. AE=CFB.BE=DFB. C.∠EBF=∠FDE D.∠BED=∠BFD8、某地区汉字听写大赛中,10名学生得分情况如下表:分数 50 85 90 95 人数3421那么这10名学生所得分数的中位数和众数分别是( )A. 85和85B.85.5和85C. 85和82.5D.85.5和809、如图,在△ABC 中,点O 是∠ABC 和∠ACB 两个内角平分线的交点,过点O 作EF ∥BC 分别交AB ,AC 于点E ,F ,已知△ABC 的周长为8,BC =x ,△AEF 的周长为y ,则表示y 与x 的函数图象大致是( )A.B. C. D.10、如图,在矩形ABCD 中,P 为矩形内部一个动点,且满足,,则线段CP 的最小值( )A.4B.2C.253 D.5132 二、填空题(本大题共4小题,每小题5分,满分20分) 11、不等式的解集是_______.12、因式分解: _______. 13、如图,一次函数的图象与反比例函数的图象交于A (-1,m )、B (3,n )两点,与x 轴交于D 点,且C 、D 两点在y 轴两侧.若△ABC 的面积是8,则点C 的坐标是_____.14、如图,等腰直角△ABC 中,AC =BC ,∠ACB =90°,AF 为△ABC 的角平分线,分别过点C 、B 作AF 的垂线,垂足分别为E 、D .以下结论:①CE =DE =BD ;②CE+EF =AE ;③AF =2BD ;④=.其中结论正确的序号是_______.三、(本大题共2小题,每小题8分,满分16分)15、计算:16、解方程:四、(本大题共2小题,每小题8分,满分16分)17、如图所示,方格纸中的每个小方格都是边长为1个单位长度的正方形,在建立平面直角坐标系后,△ABC 的顶点均在在格点上.(1)将△ABC 向右平移5个单位再向下平移2个单位后得到对应的△A 1B 1C 1,画出△A 1B 1C 1; (2)画出△A 1B 1C 1关于x 轴对称的△A 2B 2C 2(3)P(a ,b)是△ABC 的AC 边上一点,请直接写出经过两次变换后在△A 2B 2C 2中对应的点P 2的坐标.成绩申诉18、已知)211(1111121--=+-=a ,)3121(1221122--=+-=a ,)4131(1331123--=+-=a , (1)4a ______________________________;(2)猜想n a 的表达式及结果,并证明你的猜想是正确的.(3)计算:2019321a a a a +⋅⋅⋅+++=____________.五、(本大题共2小题,每小题10分,满分20分)19、如图,放置在水平桌面上的台灯的灯臂AB 长为42cm ,灯罩BC 长为30cm ,底座厚度为2cm .使用时发现:光线最佳时灯罩BC 与水平线所成的角为25°,求光线最佳时灯罩顶端C 到桌面的高度CD 的长.【参考数据:sin25°=0.42,cos25°=0.91,tan25°=0.47】.20、如图,AB 为⊙O 的直径,C 、F 为⊙O 上两点,且点C 为弧BF 的中点,过点C 作AF 的垂线,交AF 的延长线于点E ,交AB 的延长线于点D .(1)判断直线DE 与⊙O 的位置关系,并证明你的结论. (2)如果半径的长为3,tanD =43,求AE 的长.六、(本满分12分)21、合肥46中体育组为了解全校学生“最喜欢的一项球类项目”,随机抽取了部分学生进行调查,下面是根据调查结果绘制的不完整的统计图.请你根据统计图回答下列问题:(1)“喜欢乒乓球”的学生所占的百分比是__________并请补全条形统计图(图2);(2)请你估计全校1200名学生中“喜欢足球”项目的有__________名;(3)在扇形统计图中,“喜欢篮球”部分所对应的圆心角是__________度;(4)从“喜欢排球”的6人(4男2女)和“喜欢其他”的2人(1男1女)中各选1人参加座谈,被选中的两人恰好是1男1女的概率是多少?七、(本题满分12分)22、某学校兴趣小组的同学进行社会实践,经过市场调查,整理出某种商品在第x天(1≤x≤80)天的售价与销量的相关信息如下表:时间x(天)1≤x<4545≤x≤80售价(元/件)x+4080每天销量(件)200﹣2x已知该商品的进价为每件20元,设该商品的每天销售利润为y元.(1)求出y与x的函数关系式;(2)问销售该商品第几天时,当天销售利润最大,最大利润是多少?(3)该商品在销售过程中,共有多少天每天销售利润不低于5400元?(直接写出答案)八、(本题满分14分)23、如图1,在△ABC中,∠ACB=90°,AC=BC,D为AB上一点,连接CD,将CD绕点C顺时针旋转90°至CE,连接AE.(1)求证:△ACE≌△BCD;(2)若CD=4,AE=5,求AB的长;(3)如图2,若点F为AD的中点,连接EB、CF,求证:CF⊥EB.合肥46中2018-2019学年九年级段考(一模)含解析一、选择题(本大题共10小题,每小题4分,满分40分) 1、-3的相反数是( ) A.31 B.31- C.3 D.-32、下列运算正确的是( )A.43x x x =•B.32x x x =+C.226)3(x x = D.326x x x =÷3、2018年我国国民生产总值突破90万亿元,数据90万亿用科学记数法表示为( ) A.8109⨯ B.12109⨯ C.13109⨯ D.11109⨯4、如图所示的几何体是由五个小正方体组合而成的,它的主视图是( )A. B. C.D.5、一元二次方程的根是( )A.-1B.3C.1和-3D.3和-16、为防治雾霾,保护环境,合肥市掀起“爱绿护绿”热潮,经过两年时间,绿地面积增加了21%,设这两年绿地面积的平均增长率是x ,则列出关于x 的一元二次方程为( )A.%2112+=x B.%21)1(2=-x C.%21)1(2=+x D.%211)1(2+=+x7、如图,平行四边形ABCD 中,E ,F 分别为AD ,BC 边上的一点,增加下列条件,不一定能得出BE ∥DF 的是( )A.%2112+=x B.%21)1(2=-x C.%21)1(2=+x D.%211)1(2+=+x8、某地区汉字听写大赛中,10名学生得分情况如下表:分数50859095人数3421那么这10名学生所得分数的中位数和众数分别是()A.85和85B.85.5和85C. 85和82.5D.85.5和809、如图,在△ABC中,点O是∠ABC和∠ACB两个内角平分线的交点,过点O作EF∥BC分别交AB,AC 于点E,F,已知△ABC的周长为8,BC=x,△AEF的周长为y,则表示y与x的函数图象大致是()A. B. C. D.10、如图,在矩形ABCD 中,P 为矩形内部一个动点,且满足,,则线段CP 的最小值( )A.4B.2C.253 D.5132二、填空题(本大题共4小题,每小题5分,满分20分) 11、不等式的解集是_______.12、因式分解: _______.13、如图,一次函数的图象与反比例函数的图象交于A(-1,m)、B(3,n)两点,与x轴交于D点,且C、D两点在y轴两侧.若△ABC的面积是8,则点C的坐标是_____.14、如图,等腰直角△ABC中,AC=BC,∠ACB=90°,AF为△ABC的角平分线,分别过点C、B作AF的垂线,垂足分别为E、D.以下结论:①CE=DE=BD;②CE+EF=AE;③AF=2BD;④=.其中结论正确的序号是_______.三、(本大题共2小题,每小题8分,满分16分)15、计算:16、解方程:四、(本大题共2小题,每小题8分,满分16分)17、如图所示,方格纸中的每个小方格都是边长为1个单位长度的正方形,在建立平面直角坐标系后,△ABC 的顶点均在在格点上.(1)将△ABC向右平移5个单位再向下平移2个单位后得到对应的△A1B1C1,画出△A1B1C1;(2)画出△A1B1C1关于x轴对称的△A2B2C2(3)P(a,b)是△ABC的AC边上一点,请直接写出经过两次变换后在△A2B2C2中对应的点P2的坐标.成绩申诉18、已知,,(1)_______________;(2)猜想的表达式及结果,并证明你的猜想是正确的.(3)计算:=____________.五、(本大题共2小题,每小题10分,满分20分)19、如图,放置在水平桌面上的台灯的灯臂AB长为42cm,灯罩BC长为30cm,底座厚度为2cm.使用时发现:光线最佳时灯罩BC与水平线所成的角为25°,求光线最佳时灯罩顶端C到桌面的高度CD的长.【参考数据:sin25°=0.42,cos25°=0.91,tan25°=0.47】.20、如图,AB为⊙O的直径,C、F为⊙O上两点,且点C为弧BF的中点,过点C作AF的垂线,交AF的延长线于点E,交AB的延长线于点D.(1)判断直线DE与⊙O的位置关系,并证明你的结论.(2)如果半径的长为3,tanD=,求AE的长.六、(本满分12分)21、合肥46中体育组为了解全校学生“最喜欢的一项球类项目”,随机抽取了部分学生进行调查,下面是根据调查结果绘制的不完整的统计图.请你根据统计图回答下列问题:(1)“喜欢乒乓球”的学生所占的百分比是__________并请补全条形统计图(图2);(2)请你估计全校1200名学生中“喜欢足球”项目的有__________名;(3)在扇形统计图中,“喜欢篮球”部分所对应的圆心角是__________度;(4)从“喜欢排球”的6人(4男2女)和“喜欢其他”的2人(1男1女)中各选1人参加座谈,被选中的两人恰好是1男1女的概率是多少?七、(本题满分12分)22、某学校兴趣小组的同学进行社会实践,经过市场调查,整理出某种商品在第x天(1≤x≤80)天的售价与销量的相关信息如下表:时间x(天)1≤x<4545≤x≤80售价(元/件)x+4080每天销量(件)200﹣2x已知该商品的进价为每件20元,设该商品的每天销售利润为y元.(1)求出y与x的函数关系式;(2)问销售该商品第几天时,当天销售利润最大,最大利润是多少?(3)该商品在销售过程中,共有多少天每天销售利润不低于5400元?(直接写出答案)八、(本题满分14分)23、如图1,在△ABC中,∠ACB=90°,AC=BC,D为AB上一点,连接CD,将CD绕点C顺时针旋转90°至CE,连接AE.(1)求证:△ACE≌△BCD;(2)若CD=4,AE=5,求AB的长;(3)如图2,若点F为AD的中点,连接EB、CF,求证:CF⊥EB.。