辽宁省大石桥市金桥管理区初级中学2020学年九年级英语第八次质量检测试题
辽宁省大石桥市金桥管理区初级中学2014-2015学年八年级数学上学期第三次月考试题新人教版

辽宁省大石桥市金桥管理区初级中学2014-2015学年八年级数学上学期第三次月考试题一、选择(每题3分,共30 分)1、在中,分式的个数是()A. 2 B. 3 C. 4 D. 52、若表示一个整数,则整数可以取的值有 ( )A.0个 B.2个C. 4个D.无数个3、如果把分式中的和都扩大2倍,则分式的值 ( )A.扩大4倍 B.扩大2倍 C.不变 D.缩小2倍4、如果有个人完成一项工作需要天,则个人完成这项工作需要的天数 ( )A、 B、 C、 D、5、一个多边形截去一个角后,形成另一个多边形的内角和为720°,那么原多边形的边数为()6、已知则 ( )A. B. C. D.527、如图,在△ABC中,AB=AC,∠A=120°,BC=6cm,AB的垂直平分线交BC于点M,交AB于点E,AC的垂直平分线交BC于点N,交AC于点F,则MN的长为()A. 4cm B. 3cm C. 2cm D. 1cm8、如图,等边△ABC的边长为4,AD是BC边上的中线,F是AD边上的动点,E是AC边上一点,若AE=2,当EF+CF 取最小值时,则∠ECF的度数为A. 30°B. 22.5°C. 15°D. 45°9、等腰三角形ABC在直角坐标系中,底边的两端点坐标是(-2,0), (6,0),则其顶点的坐标,能确定的是()A.横坐标B.纵坐标C.横坐标及纵坐标D.横坐标或纵坐标10、如图,两个正方形的边长分别为和,如果,,那么阴影部分的面积是()A. B. C. D.二、填空题(每空3 分,共30 分)11、如果二次三项式x2-2(m+1)x+16是一个完全平方式,那么m的值是 .12、一个矩形的面积是,若它的一边长为,则它的周长是.13、若|a-2|+b2-2b+1=0,则a=__________,b=__________.14、当x=__________时,分式的值等于0.15、计算:=_______.16、若,则的值是17、如图,∠AOE=∠BOE=15°,EF ∥OB ,EC ⊥OB ,若EC=1,则EF= _________ .18、如图,△ABD 与△AEC 都是等边三角形,AB ≠AC .下列结论中,正确的是 _________ .(填序号)①BE=CD ;②∠BOD=60°;③∠BDO=∠CEO .19、已知===x x x n m n m 1453,,,的代数式表示用含 .20、一汽车从甲地开往乙地,每小时行驶v 1千米,t 小时可到达,如果每小时多行驶v 2千米,那么可提前到达________小时.三、简答题(共60 分)21 .计算(每题4分)22、(5分)已知:21=+x x请分别求出下列式子的值 (1) (2)x x 1-112---x x x23.分解因式:(每题4分,共16分)(1)(2)(3)a a a n n n 312-+++ (4)122)(2++++y x y x24.(5分) 如图,A 、B 、C 三点在同一条直线上,AB=2BC ,分别以AB ,BC 为边做正方形ABEF 和正方形BCMN 连接FN ,EC .求证:FN=EC .25、(1)先因式分解在求值(6分) .23-,4)2222==-+n m n m n m ,其中((2)先化简,再求值(7分),其中是整数,且26.(9分)如图,点O是等边△ABC内一点,∠AOB=110°,∠BOC=a.将△BOC绕点C按顺时针方向旋转60°得△ADC,连接OD.(1)求证:△COD是等边三角形;(2)当a=150°时,试判断△AOD的形状,并说明理由;(3)探究:当a为多少度时,△AOD是等腰三角形?(直接写出结论)参考答案一、选择题二、填空题__________________ 三、计算题四、简答题29、解:(4分)(8分)30、③要使,需...综上所述:当的度数为,或,或时,是等腰三角形.31、32、。
辽宁省大石桥市金桥管理区初级中学2014-2015学年七年级英语上学期第三次月考试题(无答案)

辽宁省大石桥市金桥管理区初级中学2014-2015学年七年级英语上学期第三次月考试题一、单项选择(每小题1分,共20 分)( )1. There is _______ “a” and _______”n” in the word “fan”.A. an, anB. an, aC. a, anD. a, a( )2. ______ the wolf eat vegetables?A. IsB. DoC. DoesD.Are( ) 3. They would like _________ their grandparents on Saturday.A. visitB. visitingC. to visitD.visits( )4. — _______ do you use a computer? — Every weekend.A. How oftenB. How longC. How manyD.How( )5. We read books and we can get ________.A. many informationB. much informationC. a few informationD.A lots of information( )6. ——Would you like to go to the zoo?——Oh, ________.A. I’m notB. I’d love toC. I’m very goodD. I’m free( ) 7. I ______ play games but my brother often ________.A. don’t; doesB. doesn’t; doesC. don’t; don’tD.doesn’t;doesn’t( ) 8. Let’s ___________ the classroom after school.A. cleanB. cleaningC. cleansD.to clean( ) 9. What about _________ basketball with them this Friday afternoon?A. playB. playingC. playsD.to play( ) 10. My father likes ________________ novels.A. seeingB. watchingC. readingD.looking( ) 11. There __________ a pair of shoes under the bed.A. isB. areC. beD.am( )12. I want to buy _________________.A. two box of appleB. two boxes of appleC. two boxes of applesD. two box of appples( )13. —Is it the twins’ bedroom?—Yes, it is. It’s _____ bedroom.A. Lily’s and Lucy’sB. Lily’s and LucyC. Lily and Lucy’sD. Lilys’ and lucys’( ) 14. ________ Friday afternoon, he often ________ the piano.A. In; playB. On; playsC. In; playingD.On playing( ) 15. Betty’s brother oft en buys CDs ____ her favourite singers.A. byB. ofC. with D for( ) 16. The students can’t ________ TV.A. watch alwaysB. always watchesC. always watchD. watch always( )17. My computer can work again.Thanks ______,Mr Wang.A .a lot of B. a lot C. lots of D .a little二、完形填空. (每小题1分,共10 分)Dear Alan,Thanks 21 your invitation. I’m sorry , 22 I can’t 23 you and have a drink together . I alwayshave really 24 weekdays .On sunday evening I 25 a rest .And on Monday , I 26 to my aunt’spartys . 27 Wednesday , I 28 with my parents .And I have to study 29 my maths test(测试)onTuesday .On Friday evening I 30 go to the hall. I’m going to have a party with some friends onSatursday .Would you like to come and join us ?Write soon .Yours,David( ) 21、A、to B、for C、with D、about( ) 22、A、and B、so C、but D、or( ) 23、A、to visit B、visit C、visiting D、to visiting( ) 24、A、bad B、free C、good D、busy( ) 25、A、have to B、have C、am going D、am have( ) 26、A、go B、am going C、going D、am go( ) 27、A、In B、At C、On D、To( ) 28、A、swims B、go swimming C、am going swimming D、swimming( ) 29、 A、for B、about C、to D、with( )30、A、want to B、wants C、am wangting D、to want三、阅读理解. (每小题2分,共30 分)AJeff likes fish very much. He buys some fish and takes it home. When(当……时候) his wife(妻子) sees the fish, she says to herself,“Good! Now I ask my friends to have lunch, and we can have the fish.”They like eating fish very much. When Jeff comes home in the evening, he can’t find the fish and his wife says,“Oh, your cat eats it.”And she gives Jeff some bread for supper. Jeff is not very happy. He takes the cat and his wife to the shop nearby(附近). Then he says to his wife,“My cat is one kilo and the fish is one kilo, too. The fish is here. But where is my cat?”( )31. What does Jeff like very much?A. Dogs.B. Cats.C. Fish.D.Friends( )32. Who cooks the fish?A. Jeff.B. Jeff’s wife.C. Their friends.D.Cat( )33. Jeff’s wife tell s Jeff ____.A. she eats the fishB. the cat eats the fishC. her friends eat the fishD.She eats the fish(B)Linda and Mary are good friends. Linda is thirteen. She comes from theU.S.A. Mary is twelve. She’s from London(伦敦). They study in the same school, but in different classes. Linda’s father is an English teacher in a middle school. Her mother is a driver. Mary’s mother worksin an office. Her father is a doctor. Linda can speak English, French(法语) and a little Chinese. Linda’s mother likes cooking. She likes eating rice. But Linda’s father doesn’t. He likes drinking milk and eating bread. Mary’s mother doesn’t like cooking. But she likes doing some shopping. She can make nice skirts and dresses. Mary’s father likes doing housework(家务).根据短文内容,完成下表。
2020年秋季九年级期中质量监测英语试题

2020年秋季九年级期中质量监测英语试题(全卷满分150分,120分钟完卷)第I卷(共105分)第一部分听力部分(共两节,满分30分)第一节:(共5小题,每小题1分,满分5分)听下面5段对话,每段对话后有一个小题,从题中所给的A、B、C三幅图画中选出最佳选项,并涂在答题卡上相应的位置。
每段对话读两遍。
( )1. What are they doing now?( )2. How does Tom get to school?( )3. How was the weather yesterday ?( )4. What did Mike do last weekday?( )5. How time does the class begin? 第二节:(共25小题,每小题1分,满分25分)听下面对话或独白,每段对话或独白后有几个小题,从题中所给的A、B、C 三个选项中选出最佳选项。
每段对话或独白读两遍。
听第6段材料,回答第6—7题。
( )6. Why does John like giraffes?A. Because they are interestingB. Because they are friendlyC. Because it’s interesting( )7. Where are the giraffes from?A. Canada.B. China.C. Af rica.听第7段材料,回答8—10 小题。
( )8. Where are the two speakers?A. In the bookstore.B. In the fast-food restaurant.C. In the library.( )9. How many hamburgers does the man want?A. ThreeB. fourC. Five( )10. What kind of drink would the man want?A. Orange juice.B. Green tea.C. Milk.听第8段材料,回答第11—12小题。
最新版2019-2020年人教版九年级英语全册Unit8-9月月清专项检测题及答案-精编试题

检测内容:Units(8~9)得分________ 卷后分________ 评价________听力部分(20分)一、听句子,选出正确的应答语。
(5×1分=5分)(A)1.A.Soft music. B.It’s too loud.C.I hate it.(A)2.A.No,he doesn’t. B.Yes,he is. C.It’s too long.(B)3.A.I’d love to. B.Me,too. C.Not at all.(A)4.A.Depends on what movie. B.It’s far from here. C.You will enjoy it.(C)5.A.He is tall. B.Last weekend. C.At a supermarket.二、听对话,选择最佳答案。
(5×1分=5分)(B)6.What kind of music does the woman prefer?A.Pop music. B.Classical music. C.Country music.(B)7.What kind of music does Nick prefer?A.Quiet and gentle music. B.Music that has great lyrics. C.Loud music.(C)8.Which film does the woman like?A.Spider Man. B.Harry Potter. C.Titanic.(B)9.Who can't understand the teacher?A.Bob. B.Tom. C.Mary.(C)10.Where are they going?A.To the library. B.To the theater. C.To the museum.三、听长对话,选择最佳答案。
九年级英语八校联考试卷

九年级英语八校联考试卷检验自己的学习成果最直接的方法便是通过试题,接下来是店铺为大家带来的关于九年级英语八校联考试卷,希望会给大家带来帮助。
九年级英语八校联考试卷:第一部分听力测试(25分)I. 听句子选择图片:你将听到五个句子,请你根据听到的内容,选择相应的图片。
每个句子后你有5秒钟的答题时间。
听一遍。
共5小题,计5分。
1.__________2.__________3.__________4.__________5.__________II. 听对话回答问题:你将听到六段对话,每段对话之后你将看到一个或几个问题。
请根据听到的对话内容,选择能回答所提问题的最佳答案。
每段对话之后你将有5至10秒钟的答题时间。
听两遍。
共10小题,计10分。
请听第一段对话, 回答第6小题。
( )6. What does the woman mean?A. Reading English magazines is the only way to study English.B. Listening to English songs is a better way to study English.C. Both reading English magazines and listening to English songs are good ways to study English.请听第二段对话,回答第7小题。
( )7. What’s the woman’s idea?A. She is in disagreement with the man.B. She thinks that Lily has always been pretty.C. She means that Lily used to be ugly.请听第三段对话,回答第8小题。
( )8. Why is the lake so dirty?A. Because a nearby factory keeps putting waste water into it.B. Because children often throw little stones into it.C. Because people don’t like the clean water in it.请听第四段对话,回答第9至10两个小题。
2020年秋季期期末质量检查九年级英语试题

2020年秋季期期末质量检查九年级英语试题2020年秋季期期末质量检查九年级英语(本试卷分第Ⅰ卷和第Ⅱ卷,考试时间120分钟,赋分120分)注意:答案⼀律填写在答题卡上,在试卷上作答⽆效。
.....................第Ⅰ卷(共85分)⼀、听⼒理解(每⼩题1分,共30分)(⼀)听句⼦,选择与句⼦内容相符的图⽚。
每个句⼦读⼀遍。
A B C D1. 2. 3. 4.(⼆)听句⼦,选择正确的答语。
每个句⼦读⼀遍。
5. A. Yes, they did. B. No, I can’t. C. Yes, they do.6. A. Sure. B. He’s a teacher. C. At school.7. A. Good idea. B. In the park. C. Thank you.8. A. Sorry. B. A comedy movie. C. Often.9. A. Me, too. B. It’s Ann’s. C. It’s interesting.10. A. It’s a watch. B. China. C. At 7:00 pm.(三)听对话,选择正确的答案。
A)你将听到五段对话及五个问题,选择正确的答案。
每段对话及问题读两遍。
11. A. Popular music. B. Quiet music. C. Electronic music.12. A. She failed a test. B. She was late for school. ` C. She lost her money.13. A. A UFO. B. A plane. C. A light.14. A. Katie. B. Emily. C. Katie’s sister.15. A. By taxi. B. By bus. C. By car.B)你将听到两段对话,请根据对话内容,选择正确的答案。
2019-2020年九年级英语上Module8检测试卷
2019-2020年九年级英语上Module8检测试卷Ⅰ.听句子,选择正确答语,句子读两遍。
()1. A. Ready? B. Run! C. Well done!()2. A. In the classroom.B. On the playground.C. In the street.()3. A. Computer games.B. Relay race.C. A picnic.()4. A. I prefer swimming.B. Both of us.C. I agree with you.()5. A. It was great.B. Thirty-nine.C. 2 to 1. Our team won.Ⅱ.听对话,选择正确答案,对话读两遍。
()6. What is Peter doing?A. He’s playing basketball.B. He’s training with HAS.C. He’s playing with HAS.()7. How does Tony like the match?A. Wonderful.B. Tough.C. Brilliant.()8. When will the boy go to visit his aunt?A. The next day.B. Right now.C. This weekend.()9. What are they going to do?A. Swimming.B. Surfing.C. Boating.()10. Who told them the result?A. Mr. Li.B. Miss Li.C. The headmaster.Ⅲ. 听下面两段对话,选择正确答案,每段对话读两遍。
听第1段对话,回答11-12小题。
()11. Where is the boy going to study?A. America.B. England.C. New Zealand.()12. Who hasn’t known the news yet?A. Mum.B. Dad.C. The boy’s friend.听第2段对话,回答13-15小题。
辽宁省营口市大石桥市金桥中学2023-2024学年八年级数学第一学期期末调研模拟试题【含解析】
辽宁省营口市大石桥市金桥中学2023-2024学年八年级数学第一学期期末调研模拟试题一学期期末调研模拟试题注意事项1.考生要认真填写考场号和座位序号。
2.试题所有答案必须填涂或书写在答题卡上,在试卷上作答无效。
第一部分必须用2B 铅笔作答;第二部分必须用黑色字迹的签字笔作答。
3.考试结束后,考生须将试卷和答题卡放在桌面上,待监考员收回。
一、选择题(每题4分,共48分)1.如图,//AB CD ,以点A 为圆心,小于AC 长为半径作弧,分别交AB 、AC 于E 、F 两点,再分别以,E F 为圆心,大于12EF 的长为半径画弧,两弧交于点G ,作射线AG ,交CD 于点H ,若ACD ∠120=︒,则AHD ∠的度数为()A .150︒B .115︒C .120︒D .160︒2.如图,点P 是∠AOB 平分线I 上一点,PD ⊥OB ,垂足为D ,若PD =3,则点P 到边OA 的距离是()A B .2C .3D .43.20190等于()A .1B .2C .2019D .04.相距S 千米的两个港口A 、B 分别位于河的上游和下游,货船在静水中的速度为a 千米/时,水流的速度为b 千米/时,一艘货船从A 港口出发,在两港之间不停顿地往返一次所需的时间是()A .2Sa b +小时B .2Sa b-小时C .S S a b ⎛⎫+⎪⎝⎭小时D .S S a b a b ⎛⎫+ ⎪+-⎝⎭小时5.下列各多项式从左到右变形是因式分解,并分解正确的是()A .m 2﹣n 2+2=(m+n )(m ﹣n )+2B .(x+2)(x+3)=x 2+5x+6C .4a 2﹣9b 2=(4a ﹣9b )(4a+9b )D .(a ﹣b )3﹣b (b ﹣a )2=(b ﹣a )2(a ﹣2b )6.已知a b >,则下列不等式中正确的是()A .22a b->-B .22a b<C .22a b->-D .22a b +>+7.下列计算正确的是()A .33(2)2a a -=-B .22()()a b a b b a ---=-C .222()a b a b +=+D .336()()--=a a a 8.老师设计了一个接力游戏,用小组合作的方式完成分式的运算,规则是:每人只能看见前一个人给的式子,并进行一步计算,再将结果传递给下一个人,最后完成计算.其中一个组的过程是:老师给甲,甲一步计算后写出结果给乙,乙一步计算后写出结果给丙,丙一步计算后写出结果给丁,丁最后算出结果.老师:a b a b a b --+,甲:2222()()a a b b a b a b a b +----,乙:22()()a ab ab b a b a b +--+-,丙:22()()a b a b a b -+-,丁:1接力中,计算出现错误的是().A .甲B .乙C .丙D .丁9.如图,AB ∥CD ,BC 平分∠ABD ,∠1=50°,则∠2的度数是()A .50B .60C .70D .8010.甲车行驶30千米与乙车行驶40千米所用时间相同,已知乙车每小时比甲车多行驶15千米,设甲车的速度为x 千米/小时,依据题意列方程正确的是()A .304015x x =-B .304015x x=-C .304015x x =+D .304015x x=+11.在△ABC 中,若∠A=95°,∠B=40°,则∠C 的度数为()A .35°B .40°C .45°D .50°12.一个多边形每个外角都是72︒,则该多边形的边数是()A .4B .5C .6D .7二、填空题(每题4分,共24分)13.若分式12020x x --有意义,则x 的取值范围是__________.14.一次函数y =(2m -6)x +5中,y 随x 的增大而减小,则m 的取值范围是________.15.小明用100元钱去购买笔记本和钢笔共30件,已知每本笔记本2元,每枝钢笔5元,那么小明最多能买________枝钢笔.16.函数2y x =-中,自变量x 的取值范围是.17.直线26y x =-+与x 轴的交点为M ,将直线26y x =-+向左平移5个单位长度,点M 平移后的对应点M '的坐标为______________,平移后的直线表示的一次函数的解析式为_____________.18.若解分式方程1244x mx x -=+++产生增根,则m =__________.三、解答题(共78分)19.(8分)(阅读·领会)0)a ≥的式子叫做二次根式,其中a 叫做被开方数.其中,被开方数相同的二次根式叫做同类二次根式.像同类项一样,同类二次根式也可以合并,合并方法类似合并同类项,是把几个同类二次根式前的系数相加,作为结果的系数,即(0).m n x =+≥利用这个式子可以化简一些含根式的代数式.材料二:二次根式可以进行乘法运算,公式是0,0)a b =≥≥我们可以利用以下方法证明这个公式:一般地,当0,0a b ≥≥时,根据积的乘方运算法则,可得222ab =⨯=,∵2(0)a a =≥,∴2ab =都是ab 的算术平方根,0,0)a b =≥≥利用这个式子,可以进行一些二次根式的乘法运算.0,0)a b =≥≥它可以用来化简一些二次根式.材料三:一般地,化简二次根式就是使二次根式:(I )被开方数中不含能开得尽方的因数或因式;(II )被开方数中不含分母;(III )分母中不含有根号.这样化简完后的二次根式叫做最简二次根式.(积累·运用)(1)仿照材料二中证明二次根式乘法公式那样,试推导二次根式的除法公式.(2)化简:2325(2)(0,0,0)a b c a b c -≥≥≥=______.(3)当0a b <<时,化简2232232,a b b ab a a b a b a b +-+-+并求当7,9a b =⎧⎨=⎩时它的值.20.(8分)如图,ABC ∆是等边三角形,点D 在AC 上,点E 在BC 的延长线上,且BD DE =.(1)如图甲,若点D 是AC 的中点,求证:;AD CE =(2)如图乙,若点D 不AC 的中点,AD CE =是否成立?证明你的结论.(3)如图丙,若点D 在线段AC 的延长线上,试判断AD 与CE 的大小关系,并说明理由.21.(8分)在如图所示的正方形网格中,每个小正方形的边长为1,格点三角形(顶点是网格线的交点的三角形)ABC 的顶点A ,C 的坐标分别为(,5),(,3).⑴请在如图所示的网格平面内作出平面直角坐标系;⑵请作出△ABC 关于y 轴对称的△A′B′C′;⑶写出点B′的坐标.22.(10分)《九章算术》是我国古代最重要的数学著作之一,在“勾股”章中记载了一道“折竹抵地”问题:“今有竹高一丈,末折抵地,去本三尺,问折者高几何?”翻译成数学问题是:如图所示,在ABC 中,90,10,3ACB AC AB BC ∠=︒+==,求AC 的长.23.(10分)如图,ABC ∆是等边三角形,P 是ABC ∆的角平分线BD 上一点,PE AB ⊥于点E ,线段BP 的垂直平分线交BC 于点F ,垂足为点Q .BQ=,求PE的长.(1)若2∆的形状,并说明理由.(2)连接PF,EF,试判断EFP24.(10分)如图,已知ABC.A B C;(1)画ABC关于x轴对称的'''+最短.(2)在y轴上画出点D,使AD CD25.(12分)如图,在平面直角坐标系中,△ABC的顶点A(0,1),B(2,0),C(4,4)均在正方形网格的格点上.(1)画出△ABC关于x轴对称的图形△A1B1C1并写出顶点A1,B1,C1的坐标;(2)已知P为y轴上一点,若△ABP与△ABC的面积相等,请直接写出点P的坐标.26.(1)用简便方法计算:20202﹣20192(2)化简:[(x﹣y)2+(x+y)(x﹣y)]÷2x参考答案一、选择题(每题4分,共48分)1、A【分析】先由平行线的性质得出,180CHA HAB ACD CAB ∠=∠∠+∠=︒,进而可求出CAB ∠的度数,再根据角平分线的定义求出HAB ∠的度数,则CHA ∠的度数可知,最后利用180AHD CHA ∠=︒-∠求解即可.【详解】∵//AB CD∴,180CHA HAB ACD CAB ∠=∠∠+∠=︒120ACD ∠=︒180********CAB ACD ∴∠=︒-∠=︒-︒=︒∵AH 平分CAB∠1302HAB CAB ∴∠=∠=︒30CHA ∴∠=︒180150AHD CHA ∴∠=︒-∠=︒故选:A .【点睛】本题主要考查平行线的性质和角平分线的画法及定义,掌握平行线的性质和角平分线的画法及定义是解题的关键.2、C【分析】作PE ⊥OA 于E ,根据角平分线的性质解答.【详解】作PE ⊥OA 于E ,∵点P 是∠AOB 平分线OC 上一点,PD ⊥OB ,PE ⊥OA ,∴PE=PD=3,故选C .【点睛】本题考查的是角平分线的性质,掌握角的平分线上的点到角的两边的距离相等是解题的关键.3、A【分析】任意一个非零数的零次幂都等于1,据此可得结论.【详解】20190等于1,故选A .【点睛】本题主要考查了零指数幂,任意一个非零数的零次幂都等于1.4、D【分析】先分别算出顺水和逆水的速度,再根据时间=路程÷速度,算出往返时间.【详解】依据顺水速度=静水速度+水流速度,逆水速度=静水速度-水流速度,则顺水速度为+a b ,时间为Sa b +,逆水速度为-a b ,时间为S a b-,所以往返时间为S Sa b a b++-.故选D 【点睛】本题主要考查了列代数式,熟练掌握顺水逆水速度,以及时间、路程、速度三者直接的关系是解题的关键.5、D【分析】直接利用因式分解的定义进而分析得出答案.【详解】解:A 、m 2-n 2+2=(m+n )(m-n )+2,不符合因式分解的定义,故此选项错误.B 、(x+2)(x+3)=x 2+5x+6,是整式的乘法运算,故此选项错误;C 、4a 2-9b 2=(2a-3b )(2a+3b ),故此选项错误;D 、(a-b )3-b (b-a )2=-(b-a )3-b (b-a )2=(b-a )2(a-2b ),是因式分解,故此选项正确;故选:D .【点睛】此题主要考查了因式分解的意义,正确把握因式分解的定义是解题关键.6、D【分析】根据不等式的性质解答即可.【详解】A.-2a<-2b ,故该项错误;B.22a b>,故该项错误;C.2-a<2-b ,故该项错误;D.22a b +>+正确,故选:D.【点睛】此题考查不等式的性质,熟记性质并熟练解题是关键.7、B【分析】分别根据对应的法则逐一分析即可【详解】解:A.33(2)8-=-a a ,故本选项不符合题意;B.22()()()(+)=---=----a b a b b a b a b a ,故本选项符合题意;C.222()2ab++=+a b a b ,故本选项不符合题意;D.336()()--=-a a a ,故本选项不符合题意;故选:B 【点睛】本题考查了积的乘方、平方差公式、完全平方公式、同底数幂的乘法等知识点,能正确求出每个式子的值是解此题的关键.8、B【分析】检查四名同学的结论,找出错误的步骤即可.【详解】出现错误的是乙,正确结果为:22()()a ab ab b a b a b +-++-,故选:B .【点睛】本题考查了分式的混合运算,熟练掌握运算法则是解本题的关键.9、D【分析】利用角平分线和平行的性质即可求出.【详解】∵AB ∥CD∴∠ABC=∠1=50°,∠ABD+∠BDC=180°,∵BC 平分∠ABD ,∴∠ABD=2∠ABC=100°,∴∠BDC=180°-∠ABD=80°,∴∠2=∠BDC=80°.故选D .【点睛】本题考查的是平行,熟练掌握平行的性质和角平分线的性质是解题的关键.10、C【解析】由实际问题抽象出方程(行程问题).【分析】∵甲车的速度为x千米/小时,则乙甲车的速度为x15+千米/小时∴甲车行驶30千米的时间为30x,乙车行驶40千米的时间为4015x+,∴根据甲车行驶30千米与乙车行驶40千米所用时间相同得304015x x=+.故选C.11、C【详解】∵三角形的内角和是180°,又∠A=95°,∠B=40°,∴∠C=180°﹣∠A﹣∠B=180°﹣95°﹣40°=45°,故选C.12、B【分析】用多边形的外角和360°除以72°即可.【详解】解:边数n=360°÷72°=1.故选B.【点睛】本题考查了多边形的外角和等于360°,是基础题,比较简单.二、填空题(每题4分,共24分)13、2020x≠【分析】根据分式的概念,分式有意义则分母不为零,由此即得答案.【详解】要使12020xx--有意义,则2020x≠,故答案为:2020x≠.【点睛】考查了分式概念,注意分式有意义则分母不能为零,这是解题的关键内容,需要记住.14、m<1【解析】解:∵y随x增大而减小,∴k<0,∴2m-6<0,∴m<1.15、1【详解】解:设小明一共买了x 本笔记本,y 支钢笔,根据题意,可得25100{30x y x y +≤+=,可求得y≤403因为y 为正整数,所以最多可以买钢笔1支.故答案为:1.16、x 1≥-且x 2≠.【解析】试题分析:求函数自变量的取值范围,就是求函数解析式有意义的条件,根据二次根式被开方数必须是非负数和分式分母不为0的条件,要使2x -在实数范围内有意义,必须x+10x 1{{x 1x 20x 2≥≥-⇒⇒≥--≠≠且x 2≠.考点:1.函数自变量的取值范围;2.二次根式和分式有意义的条件.17、(2,0)-24y x =--【分析】求出M 的坐标,把M 往左平移5个单位即可得到'M 的坐标,直接利用一次函数图象的平移性质可得到平移后的一次函数.【详解】解:∵直线y=-2x+6与x 轴的交点为M ,∴y=0时,0=-2x+6,解得:x=3,所以:(3,0)M ∵将直线y=-2x+6向左平移5个单位长度,∴点M 平移后的对应点M ′的坐标为:(-2,0),平移后的直线表示的一次函数的解析式为:y=-2(x+5)+6=-2x-1.故答案为:(-2,0),y=-2x-1.【点睛】此题主要考查了一次函数与几何变换,正确掌握点的平移与函数图像的平移规律是解题关键.18、-5.【分析】增根是分式方程化为整式方程后产生的使分式方程的分母为0的根.把增根代入化为整式方程的方程即可求出m 的值.【详解】方程两边都乘(x +4),得12(4)x m x -=++∵原方程增根为x =−4,∴把x=−4代入整式方程,得41m --=,解得5m =-.故答案为-5.【点睛】本题考查分式方程的增根,解决本题时需注意,要将增根x=-4,代入分式方程化为整式方程后的方程中,不然无法求得m 的值.三、解答题(共78分)19、(1)见解析;(2)2abc ;(3)ab-,463-【分析】(1)仿照材料二中证明二次根式乘法公式的方法,推导二次根式的除法公式(2)根据二次根式乘法公式进行计算即可(3)先根据二次根式除法公式进行化简,再把a 和b 的值代入即可【详解】解:(10,0)a b=≥>证明如下:一般地,当0,0a b ≥>时,根据商的乘方运算法则,可得22a b ==∵2(0)a a =≥,∴2ab =、都是a b 的算术平方根,0,0)a b=≥>利用这个式子,可以进行一些二次根式的除法运算.0,0)a b=≥>它可以用来化简一些二次根式.(20,0,0)2a b c abc ≥≥≥==故答案为:2abc (3)当0a b <<时,a b a b ab +===--当79a b =⎧⎨=⎩时,原式=46363-=-【点睛】本题考查二次根式的乘法和除法法则,,解题的关键是熟练运用公式以及二次根式的性质,本题属于中等题型.20、(1)详见解析;(2)成立,理由详见解析;(3)AD CE =,证明详见解析.【分析】(1)根据等边三角形三线合一的性质即可求得∠DBC 的度数,根据BD=DE 即可解题;(2)过D 作DF ∥BC ,交AB 于F ,证△BFD ≌△DCE ,推出DF=CE ,证△ADF 是等边三角形,推出AD=DF ,即可得出答案.(3)如图3,过点D 作DP ∥BC ,交AB 的延长线于点P ,证明△BPD ≌△DCE ,得到PD=CE ,即可得到AD=CE .【详解】()1证明:ABC ∆是等边三角形,60ABC ACB ∴∠=∠= AB AC BC==,D Q 为AC 中点,30 DBC AD DC∠==,,30BD DE E DBC =∴∠=∠=ACB E CDE ∠=∠+∠,30CDE E ∴∠==∠,,CD CE AD DC AD CE ∴==∴=,;(2)成立,如图乙,过D 作//DF BC ,交AB 于F ,则60,60,ADF ACB A AFD ∠=∠=∠=∴∆是等边三角形,60AD DF AF AFD ∴==∠=,,180 60120BFD DCE ∴∠=∠=-=,//DF BC ,FDB DBE E ∴∠=∠=∠,在BFD ∆和DCE ∆中FDB E BFD DCE BD DE ∠=∠⎧⎪∠=∠⎨⎪=⎩,BFD DCE CE DF AD ∴∆≅∆∴==,即AD CE =()3AD CE=如图3,过点D 作//DP BC ,交AB 的延长线于点P ,ABC ∆是等边三角形,APD ∴∆也是等边三角形,60AP PD AD APD ABC ACB PDC ∴==∠=∠=∠=∠=,,,// DB DE DBC DEC DP BC =∴∠=∠,,PDB CBD ∴∠=∠PDB DEC ∴∠=∠,在BPD ∆和DCE ∆中,60PDB DEC P DCE DB DE ∠=∠⎧⎪∠=∠=⎨⎪=⎩,,BPD DCE PD CE AD CE∴∆≅∆∴=∴=【点睛】本题考查了全等三角形的判定与性质,利用了等边三角形的判定与性质,全等三角形的判定与性质,解决本题的关键是作出辅助线,构建全等三角形.21、⑴⑵如图,⑶B′(2,1)【分析】(1)易得y 轴在C 的右边一个单位,x 轴在C 的下方3个单位;(2)作出A ,B ,C 三点关于y 轴对称的三点,顺次连接即可;(3)根据所在象限及距离坐标轴的距离可得相应坐标.【详解】解:(1)如图;(2)如图;(3)点B′的坐标为(2,1).22、AC=4.55【分析】在Rt △ABC 中利用勾股定理建立方程即可求出AC .【详解】∵AC+AB=10∴AB=10-AC在Rt △ABC 中,AC 2+BC 2=AB 2即()222AC 3=10AC +-解得AC=4.55【点睛】本题考查勾股定理的应用,利用勾股定理建立方程是解题的关键.23、(1)2PE =;(2)EFP ∆是直角三角形,理由见解析.【分析】(1)由ABC ∆是等边三角形,BP 是ABC ∠的平分线,得30EBP ∠=︒,结合90BEP ∠=︒,4BP =,即可得到答案;(2)由30ABP CBD ∠=∠=︒,90PEB ∠=︒得60BPE ∠=︒,由FQ 垂直平分线段BP ,得30FBQ FPQ ∠=∠=︒,进而即可得到结论.【详解】(1)∵ABC ∆是等边三角形,BP 是ABC ∠的平分线,∴30EBP PBC ∠=∠=︒,∵PE AB ⊥于点E ,∴90BEP ∠=︒,∴12PE BP =,∵QF 为线段BP 的垂直平分线,∴2224BP BQ ==⨯=,∴1422PE =⨯=;(2)EFP ∆是直角三角形.理由如下:连接PF 、EF ,∵ABC ∆是等边三角形,BD 平分ABC ∠,∴60ABC ∠=︒,30ABP CBD ∠=∠=︒,∵PE AB ⊥,∴90PEB ∠=︒,∴60BPE ∠=︒,∵FQ 垂直平分线段BP ,∴FB FP =,∴30FBQ FPQ ∠=∠=︒,∴90EPF EPB BPF ∠=∠+∠=︒,∴EFP ∆是直角三角形.【点睛】本题主要考查等边三角形的性质定理,中垂线的性质定理以及直角三角形的判定与性质定理,掌握直角三角形中,30°角所对的直角边是斜边的一半,是解题的关键.24、(1)见解析;(2)见解析【分析】(1)作出A 、C 两点关于x 轴的对称点,再顺次连接即可;(2)作点A 关于y 轴的对称点A '',连接A C '',交y 轴于点D ,点D 即为所求.【详解】(1)如图所示:(2)①作点A 关于y 轴的对称点A '',②连接A C '',交y 轴于点D ,点D 即为所求.【点睛】此题主要考查了轴对称变换以及利用轴对称求最短路线,正确得出对应点的位置是解题关键.25、(1)见解析,A 1(0,-1),B 1(2,0),C 1(4,-4);(2)(0,6)或(0,-4).【分析】(1)根据关于x 轴对称的点的坐标特征写出顶点A 1,B 1,C 1的坐标,描点即可;(2)利用割补法求得△ABC 的面积,设点P 的坐标为()0,m ,则12152ABP Sm =⨯-=,求解即可.【详解】解:(1)作出△ABC 关于x 轴对称的△A 1B 1C 1如图所示.△A 1B 1C 1顶点坐标为:A 1(0,-1),B 1(2,0),C 1(4,-4).(2)()11114421245222ABC S =+⨯⨯-⨯⨯-⨯⨯=,设点P 的坐标为()0,m ,则12152ABP S m =⨯-=,解得4m =-或6,∴点P 的坐标为(0,6)或(0,-4).【点睛】本题考查轴对称变换、割补法求面积,掌握关于x 轴对称的点的坐标特征是解题的关键.26、(1)4039;(2)x ﹣y【分析】(1)利用平方差公式变形为(2020+2019)×(2020﹣2019),再进一步计算可得;(2)先分别利用完全平方公式和平方差公式计算括号内的,再计算除法可得.【详解】解:(1)原式=(2020+2019)×(2020﹣2019)=4039×1=4039;(2))原式()222222x xy y x y x=-++-÷()2222x xy x=-÷x y =-.【点睛】本题主要考查了乘法公式的应用,解题的关键是熟练掌握整式的混合运算顺序和运算法则及完全平方公式、平方差公式.。
辽宁省大石桥市金桥管理区初级中学2014-2015学年七年级语文上学期第三次月考试题(无答案) 新人教版
辽宁省大石桥市金桥管理区初级中学2014-2015学年七年级语文上学期第三次月考试题一、积累与运用(满分30分)1、下面加点的字注音完全正确的一项是()(2分)A、猝(cù)不及防、嘈(záo)杂、不辍(chuò)、恐吓(hâ)B、溺(nì)水、憧(chōng)憬、言讫(qì)、乐(yuâ)以教和C、炫(xuàn)耀、濒(pīn)危、横亘(gân)、黄晕(yùn)D、铿锵(jiang)、濡(rú)湿、虔(qián)诚、妯(zhóu)娌3. 下列各句中,加点的成语使用有误的一句是()(2分)A.班会上,他侃侃而谈....,出众的口才使得大家对他刮目相看。
B.元旦联欢会上,全校师生欢聚一堂,共享天伦之乐....。
C.北雁南飞,活跃在田间草际的昆虫也销声匿迹....了。
D.在郴州市根雕艺术节展上,惟妙惟肖....的大鹏展翅根雕特别引人注目。
4、将下列选项依次填入文段的空缺处,正确的顺序是()(2分)在生命的旅程中,能拥有那来自四面八方的种种提醒,该是多么令人欢欣鼓舞,提醒可以是婉转的和风细雨,也可以是;可以是寥寥的片言只语,也可以是;可以直对相知的友人,也可以朝向;可以是面对面的激烈争辩,也可以只是。
A.素不相识的陌生人 B.走了火的雷霆霹雳C.悄无声息的一个暗示的眼神 D.不停的絮絮叨叨5、在原句上修改病句。
(2分)①改革开放以来,我国人民的生活水平有了明显的改善。
②即使日本一再美化侵略行径,但是不能掩盖历史真相。
6、名著填空。
(4分)《童年》是以自身经历为原型创作的自传体三部曲的第一部,其他两部为《》、《》。
主人公是。
7、仿照下面的例句,以“爱”开头,另写一个句子。
(2分)美,是蓝天上的一朵白云,是沙漠中的一片绿洲。
爱,。
8.文言诗文默写填空。
(14分)(1)《论语》中阐述学习与思考辨证关系的句子是:,。
2020年秋期中教学质量检测九年级英语试卷
2020年秋期中教学质量检测九年级英语试卷试卷满分120分,考试用时90分钟—、听力理解(本大题分为A、B、C、D四部分, 共30小题, 每小题1分, 共30分)A.听单句话(本题有5小题,每小题1分,共5分)根据句子内容和所提的问题,选择符合题意的图画回答问题,并将答题卡上对应题目所选的选项涂黑。
每小题听一遍。
( ) 1. What is mentioned?A B C( ) 2. What appeared in the sky?A B C( ) 3. What is behind the speaker’s house?A B C( ) 4. Where do many people visit?A B C( ) 5. How did the speaker go to Australia?A B CB. 听对话(本题有10小题,每小题1分,共10分)回答每段对话后面的问题,在各题所给的三个选项中选出一个最佳答案,并将答题卡上的对应题目所选的选项涂黑。
每段对话听两遍。
听第一段对话,回答第6小题( ) 6. What did the man do in Xi’an?A. Climbed up the old city walls.B. Bought many photos.C. Visited his friends.听第二段对话,回答第7小题。
( ) 7. How many times has Li Tao been to the Yellow Mountain?A. Three times.B. Four times.C. Five times.听第三段对话,回答第8小题。
( ) 8. How many people went to visit Stonehenge?A.TwoB. Three.C. Four.听第四段对话,回答第9小题。
( ) 9. Why does the boy like geography best?A. Because it is very easy for him.B. Because he wants to be a geography teacher.C. Because he can learn a lot about the w orld’s places.听第五段对话,回答第10小题。
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辽宁省大石桥市金桥管理区初级中学2020学年九年级英语第八次质量检测试题第Ⅰ卷(选择题共50分)Ⅰ.单项选择。
(每小题1分,共15分)( ) 1.—Wechat is a kind of fast, convenient and fashionable ______method.Itcan be used in ourmobile phone.—What’s more,we can use it for free.A.pronunciationB.transportationC.introductionmunication( ) 2. —Mr. Li’s never been to Shanghai, has he?— . He went there to attend a meeting last week.A.No, he hasn’tB.Yes, he hasC.No, he isn’tD. Yes,he is( ) 3. People should ______ from ______ down the trees to protect the earth.A. be stopped, to cutB. stop, to cutC. be stopped, cuttingD. stop, cutting( ) 4. “Underground” is the only word in t he English language _______ begins and endswith the letters “und”.A. whatB. whoC. thatD. whom( ) 5. —A new shop ________ for a week nearby. Let's go and have a look.—Great idea. But I'm told it doesn't __________ on Mondays.A. opened; openedB. has been opened; openC. has opened; openD. has been open; open( ) 6.—What do you think of the new bridge?—I have n ever seen _____ before.A. so a long oneB. so long oneC. such a long oneD. a such longone( ) 7. —I think Mr Zhang may be in his office.—No, he be there. I saw him just now.A. needn’t; leftB. mustn’t; leavingC. can’t; leaveD.sh ouldn’t; leave( ) 8. Would you mind me how this physics problem ?A. telling; to solveB. telling; solveC. to tell; to solveD. to tell; solve( ) 9.—Mum, I think I’m to get back to school.—Not really, my dear. You’d better at home for another day or two.A. so well; stayB. well enough; to stayC. well enough; stayD. good enough;to stay( ) 10. –Hi , Ann. How can you improve your English so much?--Oh, nothing difficult. The you work at it, the progress youwill make.A. harder, moreB. more hardly, moreC. hardlier, greaterD. harder, great( ) 11. The cakes in the restaurant ________, so they _________ well.A. are tasted better; are soldB. are tasted well; sellC. taste terrible; are soldD. taste nice; sell( ) 12.— Did you hear a terrible fire happened in the hotel near our school last night?— Yes, it took the firemen an hour to_______ the fire.A. put outB. put downC. put onD. put off( )13 — Driving less, walking more is good for our health.—So I’d rathe r_____ an hour’s walk to work tha n consider ______ a car.A. take, driveB. take, to driveC. take, drivingD. taking, driving ( )14.— It will be my turn. I feel a little nervous. — ________ You can make it!A. Congratulations!B. Take it easy.C. kook out!D. Have a good time.( )15.I hope everyone can care about ______ the environment and stop ______ things.A.protecting; wastingB.protecting; to wasteC.protect; wastingD.protect; to wasteⅡ.补全对话。
(每小题1分,共5分)从方框中选择合适的句子完成对话。
(其中有两项多余)A: Hi, Lisa. Do you know that people are talking about the future dreams a lot these days?B: 16__________A: Do you have a plan for the future? I mean what your dream is.B: Yes. I have a lot of dreams. But the greatest one is that I want to be a teacher. A: Sounds nice.17__________B: Well, I'm going to study hard and do well in all the subjectsA: Anything more?B: And I'm going to play more sports to keep fit.A: Where are you going to work?B: I'm going to work in a village school in the poor area. 18__________I think to be a village school teacher is very great.A: That sounds exciting! But when are you going to start?B: 19______________A: That's good.20_______B: I hope so. Thank you.Ⅲ.完型填空。
(每小题1分,共10分)Farley worked for the Canadian government. One day, he was 16 to learn more about wolves. Do wolves kill lots of caribou(北美驯鹿)? Do they kill people?They gave him lots of food and clothes and guns. Then they put him on a plane and took him to 17 . The plane put him down and went away. There were no houses or people in this place. But there were lots of animals and lots of wolves. People tell terrible stories about wolves. They say wolves like to kill and eat people. Farley remembered these stories, and he was 18 . He had his gun with him 19 .Then one day, he saw a group of wolves. There was a mother wolf with four baby wolves. A father wolf and another young wolf lived with them.Farley watched these wolves every day. The mother was a very 20 mother. She g ave milk to her babies. She gave them lessons about life. They learned how to 21 food. The father wolf got food for the mother. The young wolf 22 the children. They were a nice, happy family—wolf family! Farley did not need his 23 any more. In a short time, he got on well with the family. Farley watched them for five months. He learned that many stories about the wolves were 24 . Wolves do not eat people, and they do not eat many large animals. And he also learned bad things about men. It was men who killed many caribou and wolves.Later, Farley wrote a book about wolves. He wanted people to 25 them and not to kill them.( )21. A. seen B. told C. heard D. found( )22. A. a small town B. a big city C. a far place D. a lonely village( )23. A. afraid B. happy C. angry D. tired( )24. A. at times B. all the time C. once a week D. every afternoon ( )25. A. bad B. good C. hungry D. thirsty( )26. A. cook B. make C. get D. pick( )27. A. shouted at B. looked into C. laughed at D. played with( )28. A. food B. clothes C. gun D. plane( )29. A. not good B. not true C. not easy D. not clear( )30. A. grow B. have C. teach D. understandⅣ.阅读理解。