2018-2019七年级上形成性测试题参考答案

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2018——2019学年度七年级数学第一学期第二阶段学业质量监测答案

2018——2019学年度七年级数学第一学期第二阶段学业质量监测答案

2018/2019学年度第一学期第二阶段学业质量监测试卷七年级数学参考答案及评分标准说明:本评分标准每题给出了一种或几种解法供参考,如果考生的解法与本解答不同,参照本评分标准的精神给分.一、选择题(每小题2分,共计12分)二、填空题(每小题2分,共计20分)7.28.1.171×1049.210.411.512.国13.-314.15015.0.8×(1+50%)x-x=5016.2a或2 3a三、解答题(本大题共10小题,共计68分)17.(本题8分)(1)解:原式=-5+2-1+3……………………………………………………………………………1分=-3-1+3 ………………………………………………………………………………2分=-4+3 ………………………………………………………………………………3分=-1.………………………………………………………………………………4分(2)解:原式=8-8÷(-4)×(-3)……………………………………………………………………6分=8-6………………………………………………………………………………7分=2.…………………………………………………………………………………8分18.(本题5分)解:原式=3a2b+ab2-2a2b+4ab2…………………………………………………………………2分=a2b+5ab2.………………………………………………………………………………3分当a=-2,b=1时,原式=(-2)2×1+5×(-2)×12…………………………………………………………………4分=-6.………………………………………………………………………………………5分19.(本题8分)(1)解:5x-5+2=3-x.…………………………………………………………………………………1分5x+x=5-2+3.……………………………………………………………………………… 2分6x=6.………………………………………………………………………………… 3分x=1.…………………………………………………………………………………4分(2)解: x +1=3(2-3x ).…………………………………………………………………………… 5分 x +1=6-9x .……………………………………………………………………………………6分 10x =5.…………………………………………………………………………………… 7分x =12.……………………………………………………………………………………… 8分20.(本题6分)解:如图所示.…………………………………………………………………………………………… 6分 (说明:每个视图画对得2分.) ,21.(本题6分)解:(1)x +2,2(x +2). ………………………………………………………………………………2分(2)根据题意,列出方程:2(x +2)+3x =54.………………………………………………………3分解得x =10. ……………………………………………………………………………………4分 所以x +2=12.……………………………………………………………………………………5分 答:A 种果汁每杯12元,B 种果汁每杯10元. …………………………………… 6分22.(本题6分)解:∵AB =6cm ,BC =4cm ,∴AC =AB +BC =6+4=10(cm ).…………………………………………………………………2分 ∵D 是线段AC 的中点,∴AD =12AC =5cm . …………………………………………………………………………………4分∴DB =AB -AD =6-5=1(cm ).……………………………………………………………………6分主视图左视图俯视图②如图.………………………………………………………………………………………4分 (2)OA ,OF ,>. ……………………………………………………………………………7分24.(本题6分)解:(1)画图正确.……………………………………………………………………………………3分 (说明:不写结论扣1分.)(2) ∵∠AOC 与∠BOD 是对顶角,∴∠BOD =∠AOC =80°. …………………………………………………………………4分 由(1)得:∠DOE =∠α.∵∠α=30°,∴∠DOE =30°.…………………………………………………………………………5分 ∵∠BOE =∠DOB -∠DOE ,∴∠BOE =80°-30°=50°.………………………………………………………………6分OABC.DEFOA BDCE(2)120×3=360(km).………………………………………………………………………………4分 (3)设经过x 小时两车相距180km .①根据题意,得120x +60x =360-180.解这个方程,得x =1. ……………………………………………………………………5分 ②根据题意,得120x +60x =360+180.解这个方程,得x =3. ……………………………………………………………………6分 ③根据题意,得60x -120(x -4)=180.解这个方程,得x =5. ……………………………………………………………………7分 答:从两车出发直至慢车到达A 地的过程中,经过1或3或5小时两车相距180km .…8分26.(本题8分)解:(1)30.……………………………………………………………………………………………………2分 (2)∠COE =∠BOF .……………………………………………………………………………………4分 (3)∵AB ⊥CD ,∴∠COB =∠AOC =90°. ∴∠AOE +∠COE =90°. ∵∠EOF =90°, ∴∠AOE +∠BOF =90°, ∴∠COE =∠BOF . ∵OM 平分∠COE , ∴∠COM =12∠COE .∴∠COM =12∠BOF .∵∠AOC =90°,∴∠AOM +∠COM =90°.∴∠AOM +12∠BOF =90°.…………………………………………………………………………8分。

【精品】2018—2019学年度第一学期学业水平检测七年级数学试题+答案

【精品】2018—2019学年度第一学期学业水平检测七年级数学试题+答案

第11题图2018—2019学年度第一学期学业水平检测七年级数学试题(考试时间:90分钟;满分:120分)友情提示:亲爱的同学,请认真答卷,相信成功一定属于你!所有题目均在答题卡上作答,在试卷上无效。

一 选择题:每小题3分,共10小题,共30分。

1、|﹣2|的相反数为( ) A .﹣2 B .2 C. D.-2、用一个平面去截一个正方体,截面可能是( )A. 直角三角形B. 扇形C. 长方形D. 七边形3、下列各数:0,2--,-(-2),-32,21-,(-2)2其中非负数有( )个 。

A.4B.3C.2D.14、一天有8.64×104s ,一年如果按365天计算,那么一年中有( )秒。

A. 3.1536×109 B. 3153.6×104 C.3.1536×107 D.3.1536×108 5、甲种糖果 每千克a 元,乙种糖果每千克b 元,若买甲种糖果m 千克,乙种糖果n 千克,混合后的糖果每千克为( )元。

A 、2b a + B 、n m ba ++ C 、b a n m ++ D 、nm bn am ++ 6、下列说法正确的有( )个。

①一个有理数不是整数就是分数; ②一个有理数不是正数就是负数; ③一个整数不是正的就是负的; ④一个分数不是正的就是负的; ⑤符号不同的两个数互为相反数;⑥一个正数一定大于它的倒数。

A 、5 B 、2 C 、3 D 、47、 观察下列算式:21=2,22=4,23=8,24=16,25=32,26=64 ...,则21+22+23+24+…+22017+22018的和的个位数字是( ) A 、2 B 、4 C 、8 D 、6 8、下列说法正确的是( )A 、231x π的系数是31 B 、单项式a 既没有系数又没有次数 C 、a+b=c 与3yx +都是代数式 D 、单项式a 2bc 的系数是1,次数是4 9、若a 2=1,b 3=-8,则ab 的值为( )A 、±2B 、±8C 、2 D-210、如图,是由一些小立方块所搭几何体的三种视图,若在所搭几何体的基础上(不改变原几何体中小立方块的位置),继续添加相同的小立方块,以搭成一个大正方体,至少还需要( )个小立方块.主视图 左视图 俯视图A 、25B 、11C 、53D 、54二 填空题:每小题3分,共10小题,共30分11、如图是一个正方体盒子的展开图,若在其中的三个正方形A ,B ,C 内分别填入适当的数,使得它们折成正方体后相对的面上的两个数互为相反数,则填入正方形A ,B ,C 内的三个数依次为 . 12、比较大小: 76- 65-; -76.13、已知-3x 3+m y 和x 2y 3n 是同类项,则代数式m 2017+(-3n)2018-mn= .14、如图,小红房间的窗户的装饰物如图所示, 挂上这种窗帘后,窗户上还可以射进阳光的面积 为 .15、已知下列一组数1,259,167,95,43--,则第100个数是16. 如图是一个数值转换机的示意图,输入的x 、y 的 值满足(x+3)2+∣2+y ∣=0,则输出的结果为。

2018-2019学度北师大初一上年末质量检测试卷含解析.doc.doc

2018-2019学度北师大初一上年末质量检测试卷含解析.doc.doc

2018-2019学度北师大初一上年末质量检测试卷含解析注意事项:认真阅读理解,结合历年的真题,总结经验,查找不足!重在审题,多思考,多理解!无论是单选、多选还是论述题,最重要的就是看清题意。

在论述题中,问题大多具有委婉性,尤其是历年真题部分,在给考生较大发挥空间的同时也大大增加了考试难度。

考生要认真阅读题目中提供的有限材料,明确考察要点,最大限度的挖掘材料中的有效信息,建议考生答题时用笔将重点勾画出来,方便反复细读。

只有经过仔细推敲,揣摩命题老师的意图,积极联想知识点,分析答题角度,才能够将考点锁定,明确题意。

班级:__________姓名:___________〔出题:马奎亮审核:〕【一】选择题〔每题3分,共36分.在每题给出的四个选项中,只有一项为哪一项符合要求的.〕1、-3的相反数是〔〕A 、31-B 、31C 、-3D 、32、2017年11月举办国际花卉博览会,其间展出约320000株新鲜花卉、珍贵盆景、罕见植株, 2400000这个数用科学记数法表示,结果正确的选项是〔〕 A 、0.24×103B 、2.4×106C 、2.4×105D 、24×1043、线段AB =10cm ,点C 是直线..AB ..上一点,BC =4cm ,假设M 是AC 的中点,N 是BC 的中点,那么线段MN 的长度是〔〕.A 、7cmB 、3cmC 、7cm 或3cmD 、5cm4、以下图形中,是正方体表面展开图的是〔〕 ABCD5、b a m 225-和437a bn-是同类项,那么n m +的值是〔〕.A 、2B 、3C 、4D 、56、以下各式的计算,正确的选项是() A 、ab b a 523=+B 、mn mn n m 22422=- C 、x x x 5712-=+-D 、23522=-y y7、假设有理数a 、b 互为相反数,那么以下等式中一定成立的是〔〕A a -b =0B a +b =0C ab =1D ab =-18、如果关于x 的一元一次方程2x +a =x -1的解是x =-4,那么a 的值为〔〕 A3B5C -5D -139、代数式x +2y 的值是3,那么代数式2x +4y +1的值是〔〕 A.1B.4C.7D.不能确定10、某种产品,商品的标价为120元,假设以九折降价出售,相对于进货价仍获利20%,该商品的进货价为〔〕。

2018-2019年人教版英语初一上学期综合检测卷一

2018-2019年人教版英语初一上学期综合检测卷一

2018-2019年人教版英语初一上学期综合检测卷一一、单项选择(8分)1.(1分)CD的汉语意思是____。

A.(铅笔芯)硬黑B.光盘C.英国广播公司D.停车场2.(1分)—What are____?—They are birds.A.thisB.thatC.it3.(1分)I like to play____ piano and he likes to play____chess.A.the; theB.the;/C./;the 4.(1分)He eats____dinner at7:30in the evening.A./B.anC.the5.(1分)He wants____a dictionary in the store.A.buyB.and buysC.to buy6.(1分)—Where____the socks?—____on the bed.A.is;It'sB.are;They D.these D./;/ D.a D.buysC.are; They'reD.is;It7.(1分)John wants to join the____club.He can____well.A.swim;swimB.swim;swimsC.swimming;swimD.swimming;swimming8.(1分)一Do you like____ for lunch?一No.I like____.A.chicken;vegetableB.chicken;vegetablesC.chickens;vegetablesD.chickens;vegetable二、完形填空(10分)9.(10分)Do you know George Jackson,the rock singer1glasses?Now George Jacksonhas2new look.He always3curly hair,4now he is bald(秃头的).He is kindof 5,but now he is of medium build.He likes to6jeans(牛仔裤)and glass, but now he always wears a black jacket and he doesn't wear glasses.7the reporter asks him8his new look,George Jackson9,"It's great!I like to change my look 10.That's fun.") ) ) ) ) ) ) ) )(1(2(3(4(5(6(7(8(9A.inA./A.isA.butA.bigA.putA.HowA.aboutA.saysB.withB.anB.haveB.andB.heavyB.buyB.WhatB.inB.talksC.onC.someC.hasC.orC.relaxedC.wearC.WhyC.withC.speaksD.fromD.aD.there isD.sozyD.inD.WhenD.toD.tells)(10A.neverB.oftenC.thenD.just三、阅读理解(22分)10.(6分) My name is Bill.I'm English.I'm a worker.My wife Ann is a teacher. We have two children,a son and a daughter.Our son's name is Jim.Our daughter's name is Kate.They are students. My father's name is Rubby.My mother's name is Grace.They are old.I have a brother.His name is Sam.He is a worker,too.My wife's father's name is Edgar. Her mother's name is Rose.Her sister is Lucy.Lucy is a doctor.(1)Bill is from____.A.ChinaB.JapanC.EnglandD.America(2)Kate and Jim are____.A.workersB.doctorsC.teachersD.students(3)Rose is my wife's____.A.daughterB.motherC.sisterD.aunt(4)Lucy may work in a____.A.hospitalB.schoolC.factoryD.theatre11.(8分) Computers are useful machines.They can help people a lot in their daily life.For example,they can help people to save much time to do much work,and they can help people to work out many problems they can't do easily.Our country asks everyone to learn to use computers except the old people.Today more and more families own computers.Parents buy computers for their children. They hope that computers can help them to improve their studies at school.But many of their children use computers to play games and watch videos.For most students, computers can not help them to study better but make them fall behind.So computers are locked in boxes by parents.In some other countries,even some scientists also hate computers.They say computers let millions of people lose their jobs or bring them a lot of trouble.Will computers really bring trouble to people or can they bring people happiness?It will be decided by people themselves!(1)Why do we say the computer is a useful machine?A.Because our country asks us to learn to use it.B.Because it can help us a lot.C.Because we can use it to play games.D.Because it can help us to find jobs.(2)What do many parents complain about?A.They complain that their children use computers to play games.B.They complain that computers let them lose their jobs.C.They complain that computers bring them a lot of trouble.D.They complain that computers can't bring them happiness.(3)In this passage we know computers____.A.also bring us troubleB.bring us happiness onlyC.are hated by peopleD.are bad for people's health(4)Can computers really help children to study better?A.Yes,they can.B.It's hard to say.C.No,they can't.D.Of course not.(5)How do you understand the last sentence of this passage?A.It means computers are used by people.B.It means people can live well without computers.C.It means one must decide how to use computers.D.It means computers are strange machines.12.(8分)Most American families are smaller than the families in other countries.Children in the US will leave their parents'home when they grow up.They usually live far from their parents because they want to find good jobs.They often write to their parents or telephone them. And they often go to visit their parents on holiday.Parents usually let their children choose their own jobs.Americans think it is important for young people to decide on their lives by themselves.In America,parents usually let their children do some work around their house.And in many families,parents give their children money for doing some housework so that their children learn how to make money for their own use.(1)An American family is____than that in other country.A.moreB.lessC.biggerD.smaller(2)When children in America grow up,they leave their parents'home to____.A.get married(结婚)B.be freeC.find good jobsD.study(3)They visit their parents____.A.on weekdaysB.on holidayC.at any timeD.on weekends(4)Which one is NOT right?A.Children are free to choose their own jobs.B.Parents don't ask their children to do any housework.C.Parents think it is important for their children to make their own decisions.D.American children usually live far from their parents when they grow up.四、七选五(10分)13.(10分)Recently,a very simple question became widely spread online:What China should be proud of?1Lanlan,whose real name is Negar Kordi,is from Canada.She came to China five years ago and is a student at Ningbo University.Now she has120,000fans on the Internet and the number is still growing.Lanlan loves China.2"It is the easiest country in which to find a job.If you are not too lazy,it is really very simple to find a job in China.I believe there're more job chances here than in any other country in the world.""3About400million Chinese are studying English.If they can speak good English in the future,China will have the greatest number of English speakers of any non-English speaking country.""The speed of Chinese trains is fast.From Ningbo to Beijing,the train runs1,365 kilometers for seven hours and the ticket fare is only595yuan.""Its public security is great.4I have travelled in many countries,and I think China really is very safe.""There are much more things China should be proud of.Many Chinese people often complain about China.At first,I believed that they didn't like China or that they loved western countries.But later,I realized that they just set a very high standard for China.5Actually, China must be much better than other countries."A.The foreign language level is surprising.B.This country of1.4billion people makes me feel safe.C.A foreign girl living in China gave a very touching answer.D.They believe that it's not enough to be number one in the world.E.She believes China will be the strongest country in the world in future.五、补全对话(5分)14.(5分)Mary:Hello!I want to have a class party.1L ana:Sure.I can help you.2M ary:Let's have it today.Lana:No,today is too early.If we have it today,half the class won't come.Mary:OK.3L ana:Hmm.There is a test the day after tomorrow.Students will come early to study for their test.Let's have it on the weekend.M ary:OK.Let's have it on Sunday.4L ana:No,I don't think we should watch a CD video.5Let's play party games.M ary:Good idea.Can you organize the games?Lana:Sure.I can do that.A.Let's have it the day after tomorrow.B.When shall we have the party?C.We can watch a CD video.D.Will you help me organize it?E.Some students will be bored.六、选词填空(10分)15.(10分)three,meaningful,work,over,speech,late,ancient,named,skill,readThe golden autumn season means it's harvest (收获)time and summer is.But on Sept 16,our school held the annual Reading Report where we shared the reading we did over summer vacation.It lasted for two days.Each speaker gave a about his or her favorite book.About1,200students took part in the activity.My speech was about a book A General History of China《(中国通史》).I t introduced Chinese history from times all the way to the modern era (时代).this book helped me understand the pride we have in our country.What's more,it encouraged me hard.Through this activity,we improved our speaking. Wang Yinan,14,even stayedup to prepare for his speech."Keep reading and improve your Chinese,"he said in the speech.I think this activity was for everyone.七、书面表达(15分)16.(15分)Look at the picture,please.There is a backpack,a baseball,a pencil case,a plant and some keys and books.Where are the books?They are on the table.And where is the backpack?You see,it's under the table.The pencil case is on the chair,and the plant is next to the table.What's under the chair?Oh,it's a baseball.Look!What are those?They are my keys, and they are behind the chair.根据文章内容找到下面的东西在图画中的位置,并将代表其位置的字母分别填入相应的圆圈中。

2018-2019上学期数学七年级答案

2018-2019上学期数学七年级答案

2018-2019上学期七年级数学质量检测答案一.选择题(每题4分,共12小题,共48分)1B 2D 3C 4C 5C 6B 7B 8B 9A 10C 11C 12D二.填空题(每题4分,共6小题,共24分)13.③⑤.14.扇形图折线.15.①②⑤.16.列表法、解析法(关系式)、图象法.17.14.18.72°.三.解答题(共8小题,78分)19.(9分)本题共9分,做对线段BC的痕迹给2分;做对∠ABC的痕迹给3分;做对∠ACB的痕迹给3分;结论给1分。

20.(9分)解:(1)80÷20%=400,答:这次调查的家长人数为400人.…………………2分反对的家长的个数为:400﹣40﹣80=280;…………………3分如图所示:补全图…………………5分(2)×360°=36°,答:扇形图中表示家长“赞成”的圆心角的为36°.…………………7分(3)10000×≈2258,答:估计在这些学生中,对中学生带手机现象持“无所谓”态度的人数约为2258人.…………………9分21.(10分)解:(1)由图象可得,小明家到学校的路程是1500米,…………………2分(2)小明在书店停留了12﹣8=4(分钟)…………………4分(3)本次上学途中,小明一共行驶了:1500+(1200﹣600)×2=2700(米),一共用了14分钟,…………………6分(4)当时间在0~6分钟内时,速度为:1200÷6=200米/分钟,当时间在6~8分钟内时,速度为:(1200﹣600)÷(8﹣6)=300米/分钟,当时间在12~14分钟内时,速度为:(1500﹣600)÷(14﹣12)=450米/分钟,∵450>300,∴在整个上学途中12~14分钟时间段小明的汽车速度最快,速度不在安全限度.………10分(只对12~14分钟内速度进行说明也可全对)22.(10分)证明:(1)∵∠ABC=90°,EF⊥AC,∴∠ABC=∠AFE=90°在△AEF与△ACB中,∴△AEF≌△ACB(AAS)…………………4分∴AF=AB,∴BE=CF;…………………5分(2)∵△ABC≌△AFE,∴AB=AF,在Rt△AGF和Rt△AGB中,∴Rt△AFG≌Rt△ABG(HL)…………………8分在Rt△BEG中,∠BGE=90°﹣∠E=50°,∴∠BGF=130°,∵Rt△AGF≌Rt△AGB,∴∠AGB=∠AGF=∠BGF=65°.…………………10分23.(10分).解:(1)∵AD∥BC,∠A=90°,∠1=∠2,∴∠A=∠B=90°,DE=CE.…………………2分∵AD=BE,在Rt△ADE与Rt△BEC中,∴Rt△ADE≌Rt△BEC(HL)…………………5分(2)由△ADE≌△BEC得∠AED=∠BCE,AD=BE.∴∠AED+∠BEC=∠BCE+∠BEC=90°.∴∠DEC=90°.…………………7分又∵AD=6,AB=14,∴BE=AD=6,AE=14﹣6=8.…………………8分∵∠1=∠2,∴ED=EC=,…………………9分∴△CDE的面积=.…………………10分24(10分)解:(1)设∠BAC=x°,∵AD=BD,∴∠A=∠ABD=x°,∴∠BDC=2x°,∵BD=BC,∴∠BDC=∠BCD=2x°,∵AB=AC,∴∠ABC=∠ACB=2x°,由∠BAC+∠ABC+∠ACB=180°可得x+2x+2x=180,解得:x=36,则∠BAC=36°,∠ACB=72°;…………………5分(2)∵E是AB的中点,AD=BD,∴DE⊥AB,即FE⊥AB;∴AF=BF,∴∠BAF=∠ABF,…………………7分又∵∠ABD=∠BAD,∴∠F AD=∠FBD=36°,…………………8分又∵∠ACB=72°,∴∠AFC=∠ACB﹣∠CAF=36°,∴∠CAF=∠AFC=36°,∴AC=CF,即△ACF为等腰三角形.…………………10分25.(10分)证明:(1)∵AE、BE分别平分∠DAB、∠CBA,∴∠BAE=∠EAF,∠ABF=∠EBC,∵AD∥BC,∴∠EBC=∠F,∠ABF=∠F,…………………2分在△ABE和△AFE中,,∴△ABE≌△AFE(AAS);…………………5分(2)∵△ABE≌△AFE,∴BE=EF,在△BCE和△FDE中,,∴△BCE≌△FDE(ASA),…………………7分∴BC=DF,∴AD+BC=AD+DF=AF=AB,即AD+BC=AB.…………………9分∵AD=2,BC=6,∴AB=8.…………………10分26.(10分)(1)证明:∵AB=AC,∴∠EBC=∠DCB,在△EBC和△DCB中,,∴△EBC≌△DCB(SAS),∴∠ECB=∠DBC,∴FB=FC,…………………3分∵AB=AC,∴AF是线段BC的垂直平分线,…………………5分即AG⊥BC.…………………6分(2)等于∠BAC的角有:∠BAG,∠CAG,∠FBG,∠FCG.………10分。

2018-2019学年(上)厦门市七年级质量检测数学试卷参考答案(正式)

2018-2019学年(上)厦门市七年级质量检测数学试卷参考答案(正式)

2018-2019学年(上)厦门市七年级质量检测数学参考答案及评分标准说明:解答只列出试题的一种或几种解法.如果考生的解法与所列解法不同,可参照评分量表的要求相应评分.二、填空题(本大题共6小题,每题4分,共24分)11. (1)0; (2)﹣2; (3)3; (4)﹣4; (5)5; (6)﹣5. 12. 3 . 13. 54°45′ . 14. 1.15. 19, 3n+1. (填对一个给2分) 16. 2或8 . (填对一个给2分) 17.解:(1)2(7)8-+-+89+-= …………… 2分 1-= …………… 4分(2)())23(14+-+xy xy2344--+=xy xy …………… 2分2+=xy …………… 4分(3) ()411253⎛⎫-+-÷--- ⎪⎝⎭561-+-= ……………3分0= . ………………4分(4)3+5202.x x =-52023-=+x x ……………2分155=x ……………3分 3=x ……………4分18.解:222(22)25x x x x +---2224425x x x x =+--- ……………2分4x =-- ……………4分 当21-=x 时 原式= 421-……………5分27-=……………7分19.解:由题意得,341=35x x -++……………1分 )4(3)3(515+=-+x x ……………3分 12315515+=-+x x ……………5分 1235=-x x ……………6分∴6x =∴当6x =时,313x -+和+45x 的值相等.…………7分20.解:(1)作线段a 和线段b ……………2分 作答 ……………3分(2) > ……………5分两点之间,线段最短 ……………7分21. 解:设有x 辆车,则有(92+x )人 …………1分()3229x x -=+ …………3分解得,15x =………5分∴2+9215+939x =⨯= ………6分答:有39人,15辆车. ………7分22. 解:(1)∵OD 平分AOC ∠且80AOC ∠=︒∴ 11804022DOC AOC ∠=∠=⨯︒=︒ ……………1分 ∵OE 平分BOC ∠且40BOC ∠=︒∴ 11402022EOC BOC ∠=∠=⨯︒=︒ ……………2分∴ 402060DOE DOC EOC ∠=∠+∠=︒+︒=︒ …………3分 (2)解法一∵120AOE ∠=︒,70DOE ∠=︒∴ 1207050AOD AOE DOE ∠=∠-∠=︒-︒=︒ …………4分∵OD 平分AOC ∠∴ 50DOC AOD ∠=∠=︒ …………5分∴705020EOC DOE DOC ∠=∠-∠=︒-︒=︒ …………6分 ∵OE 平分BOC ∠∴ ︒=∠=∠402EOC COB ……………7分解法二:设︒=∠x COE ,则︒=∠x COB 2依题意,得)70(2120x x -=- ……………5分 解得,20=x ……………6分 ∴︒=︒=∠402x COB ……………7分23.解:(1)设乙商品原价为x 元4000.6+0.8408x ⨯= …………2分解得:210x = ………4分 答:原价为210元.(2)设甲商品的成本是y 元,则乙商品的成本是(408-y )元.()m%y 2%408m y =- …………6分解得: 272y = ………7分 272-240=32答:甲商品的成本是243元,亏损272-240=32元. ………8分ABC DEO图624. 解:(1) 1 …………2分5 …………4分 (2)78410,a a --=∴.61487或﹣=+a a ∵均为正整数,,87a a∴.1487=+a a …………5分 ∵任意4个相邻格子中所填正整数之和都相等.∴前2020个数的和()1234505S a a a a =+++. …………6分又34564567a a a a a a a a +++=+++ ∴37a a = . …………7分 同理48a a = .∴347814a a a a +=+= . …………8分()1234505505189090S a a a a =+++=⨯= …………9分25.解:(1)∵ 点A ,O ,B 三点在同一直线上, ∴ ∠AOC +∠BOC = 180°. …………1分 ∵ ∠AOC = 30°,∴ ∠BOC = 150°. …………2分 ∵ ∠BOD 与∠BOC 互补,∴ ∠BOD +∠BOC = 180°. …………3分 ∴ ∠BOD = 180°-150°= 30°. …………4分(3)∠MON 与∠DON 之间具有以下数量关系:2∠DON -∠MON =90°. …………5分 理由如下: 设∠AOM =α,∵ ∠AOC 与∠MON 互余,∴ ∠AOC +∠MON =90°. …………6分 ∵ OM 平分∠AOC , ∴ ∠AOC =2∠AOM =2α.图7O DCBA∴∠MON=90°-2α .…………7分∵∠BOD与∠BOC互补,∴∠BOD +∠BOC = 180°.又∠AOC +∠BOC = 180°,∴∠BOD=∠AOC=2α.…………8分∴∠DON =180°-∠AOM-∠MON-∠BOD=180°-α-(90°-2α) -2α=90°-α. …………9分∴2∠DON =2(90°-α)=180°-2α= 90°+90°-α. ∴2∠DON-∠MON=90°. …………10分。

2018-2019学年度七年级上册语文期试卷(有答案)

2018-2019学年度七年级上册语文期试卷(有答案)

2018--2019学年度七年级语文(上)期末试卷(120分钟完卷,总分150分)一、基础知识测试(完成1-11题,每题3分,共40分)1、下列各项中对加点字的注音完全正确的一项是()(3分)A、伫(zhù)立酝酿(rǎng) 枯涸(hé) 骇(hài)人听闻B、附和(hè) 落难(nàn) 看(kān)护忍俊不禁(jìn)C、诱(yòu)惑雏(chú)形收敛(liǎn) 猝(zhú)然长逝D、玷(diàn)污泯(mǐn)灭宽恕(shù) 苦心孤诣(yì)2、中华经典诗词是个广袤、深邃、绚丽多彩的世界。

这里,有“春潮带雨晚来急,野渡无人舟自横”的A(娴雅文静闲淡宁静),有“日月之行,若出其中;星汉灿烂,若出其里”的恢弘壮阔。

她如甘霖B(滋润滋长)着干涸的心田,如花朵点zhuì()了寂寞的生活。

走进这个世界,能táoyě()我们高尚的情操,诗化我们多彩的生活。

(1)给文中加点字注音(3分)干涸()点zhuì()陶yě()(3)从括号中选择恰当的词语分别填入A、B两处(2分)A:B:3、将下列语句依次填入文段的横线处,恰当的一项是( )(3分)几十年来,霍金的身体禁锢在轮椅中,,,他以极度残疾之身,取得了极其辉煌的科学成就。

①发现了一个又一个宇宙运行的重大奥秘②震动了整个理论物理学界③思维却遨游于广袤的太空A、①②③B、③①②C、③②①D、②③①4、下列句子中没有语病的一项是()(3分)A、老师耐心地纠正并指出了我这次作业中存在的问题。

B、市长能否下河游泳,成了一些市民检验河道水质达标的标准。

C、通过这次“个性作文”大赛,使他对写作的信心增强了。

D、有专家指出,运动过少是导致部分青少年肥胖的主要原因。

5、与下段文字衔接自然、连贯、得体的一句是()财富是什么?商人摆弄着手机说,财富就是赚来的金钱;学者推了推眼镜说,财富就是创造的知识;哲人拍了拍地球仪说,财富就是拥有的智慧;农民望着金黄的麦浪说,不同的人,不同的经历,得出了不同的答案。

2018-2019学年度第一学期七年级数学上册期末教学质量检测(有答案解析)

2018-2019学年度第一学期七年级数学上册期末教学质量检测(有答案解析)

2018-2019学年度第一学期期末教学质量检测七年级数学试卷一、选择题(每题3分,共36分)1.(3分)﹣的相反数是( )A.B.﹣C.2D.﹣22.(3分)据统计,2017年双十一当天,天猫成交额1682亿,1682亿用科学记数法可表示为( )A.16.82×1010B.0.1682×1012C.1.682×1011D.1.682×10123.(3分)如图,把下列图形折成一个正方体的盒子,折好后与“礼”相对的字是( )A.雅B.教C.集D.团4.(3分)已知a x b2与ab y的和是a x b y,则(x﹣y)y等于( )A.2B.1C.﹣2D.﹣15.(3分)下列各式正确的是( )A.19a2b﹣9ab2=10a2b B.3x+3y=6xyC.16y2﹣7y2=9D.2x﹣5x=﹣3x6.(3分)某同学用剪刀沿直线将一片平整的银杏叶剪掉一部分(如图),发现剩下的银杏叶的周长比原银杏叶的周长要小,能正确解释这一现象的数学知识是( )A.两点之间线段最短B.两点确定一条直线C.垂线段最短D.经过直线外一点,有且只有一条直线与这条直线平行7.(3分)如图,C是AB的中点,D是BC的中点,下列等式不正确的是( )A.CD=AD﹣BC B.CD=AC﹣DB C.CD=AB D.CD=AB﹣DB8.(3分)下列解方程步骤正确的是( )A.由2x+4=3x+1,得2x﹣3x=1+4B.由7(x﹣1)=3(x+3),得7x﹣1=3x+3C.由0.2x﹣0.3=2﹣1.3x,得2x﹣3=2﹣13xD.由,得2x﹣2﹣x﹣2=129.(3分)如图,AB∥CD,直线EF分别与直线AB,CD相交于点G,H,已知∠3=50°,GM平分∠HGB交直线CD于点M,则∠1等于( )A.60°B.80°C.50°D.130°10.(3分)在雅礼社团年会上,各个社团大放光彩,其中话剧社52人,舞蹈社38人要外出表演,现根据演出需要,从舞蹈社中抽调了部分同学参加话剧社,使话剧社的人数恰好是舞蹈社的人数的3倍.设从舞蹈队中抽调了x人参加话剧社,可得正确的方程是( )A.3(52﹣x)=38+x B.52+x=3(38﹣x)C.52﹣3x=38+x D.52﹣x=3(38﹣x)11.(3分)如图,在△ABC中,∠A=90°,点D在AC边上,DE∥BC,若∠1=155°,则∠B的度数为( )A.45°B.55°C.65°D.75°12.(3分)如图,都是由边长为1的正方体叠成的立体图形,例如第(1)个图形由1个正方体叠成,第(2)个图形由4个正方体叠成,第(3)个图形由10个正方体叠成,依次规律,第(7)个图形由( )个正方形叠成.A.86B.87C.85D.84二、填空题(每题3分,共18分)13.(3分)一个角的补角比这个角的余角的2倍大18°,则这个角的度数为 .14.(3分)若a的相反数是﹣3,b的绝对值是4,且|b|=﹣b,则a﹣b= .15.(3分)已知代数式x﹣3y﹣1的值为3,则代数式5+6y﹣2x的值为 .16.(3分)如果线段AB=5cm,BC=4cm,且A、B、C三点在同一条直线上,则AC= .17.(3分)如图,直线a∥b,直角三角形ABC的直角顶点C在直线b上,∠1=20°,∠2=2∠A,则∠A= .18.(3分)按照下列程序计算输出值为2018时,输入的x值为 .三、解答题(本大题有8个小题,共66分)19.(8分)计算:(1)(﹣+﹣)×(﹣12)(2)﹣|﹣5|×(﹣12)﹣4÷(﹣)2.20.(8分)解方程:(1)2x+3=12﹣3(x﹣3)(2)21.(6分)先化简,再求值,x2﹣3(2x2﹣4y)+2(x2﹣y),其中|x+2|+(5y﹣1)2=022.(8分)如图,在△ABC中,GD⊥AC于点D,∠AFE=∠ABC,∠1+∠2=180°,∠AEF=65°,求∠1的度数.解:∠AFE=∠ABC(已知)∴ (同位角相等,两直线平行)∴∠1=∠ (两直线平行,内错角相等)∠1+∠2=180°(已知)∴ (等量代换)∴EB∥DG ∴∠GDE=∠BEA GD⊥AC(已知)∴ (垂直的定义)∴∠BEA=90°(等量代换)∠AEF=65°(已知)∴∠1=∠ ﹣∠ =90°﹣65°=25°(等式的性质)23.(8分)如图:∠BCA=64°,CE平分∠ACB,CD平分∠ECB,DF∥BC交CE于点F,求∠CDF和∠DCF的度数.24.(8分)中雅七年级(1)班想买一些运动器材供班上同学阳光体育课件使用,班主任安排班长去商店买篮球和排球,下面是班长与售货员的对话:班长:阿姨,您好!售货员:同学,你好,想买点什么?(1)根据这段对话,你能算出篮球和排球的单价各是多少吗?(2)六一儿童节店里搞活动有两种套餐,1、套装打折:五个篮球和五个排球为一套装,套装打八折:2、满减活动:999减100,1999减200;两种活动不重复参与,学校打算买15个篮球,13个排球作为奖品,请问如何安排更划算?25.(10分)“幸福是奋斗出来的”,在数轴上,若C到A的距离刚好是3,则C点叫做A 的“幸福点”,若C到A、B的距离之和为6,则C叫做A、B的“幸福中心”(1)如图1,点A表示的数为﹣1,则A的幸福点C所表示的数应该是 ;(2)如图2,M、N为数轴上两点,点M所表示的数为4,点N所表示的数为﹣2,点C 就是M、N的幸福中心,则C所表示的数可以是 (填一个即可);(3)如图3,A、B、P为数轴上三点,点A所表示的数为﹣1,点B所表示的数为4,点P所表示的数为8,现有一只电子蚂蚁从点P出发,以2个单位每秒的速度向左运动,当经过多少秒时,电子蚂蚁是A和B的幸福中心?26.(10分)已知AM∥CN,点B为平面内一点,AB⊥BC于B(1)如图1,直接写出∠A和∠C之间的数量关系;(3)如图2,过点B作BD⊥AM于点D,求证:∠ABD=∠C;(3)如图3,在(2)问的条件下,点E、F在DM上,连接BE、BF、CF,BF平分∠DBC,BE平分∠ABD,若∠FCB+∠NCF=180°,∠ABF=2∠ABE,求∠EBC的度数.参考答案与试题解析一、选择题(每题3分,共36分)1.(3分)﹣的相反数是( )A.B.﹣C.2D.﹣2【分析】根据相反数的定义:只有符号不同的两个数叫相反数即可求解.【解答】解:根据概念得:﹣的相反数是.故选:A.【点评】本题考查了相反数的意义,一个数的相反数就是在这个数前面添上“﹣”号:一个正数的相反数是负数,一个负数的相反数是正数,0的相反数是0.不要把相反数的意义与倒数的意义混淆.2.(3分)据统计,2017年双十一当天,天猫成交额1682亿,1682亿用科学记数法可表示为( )A.16.82×1010B.0.1682×1012C.1.682×1011D.1.682×1012【分析】用科学记数法表示较大的数时,一般形式为a×10n,其中1≤|a|<10,n为整数,据此判断即可.【解答】解:1682亿=1.682×1011.故选:C.【点评】此题主要考查了用科学记数法表示较大的数,一般形式为a×10n,其中1≤|a|<10,确定a与n的值是解题的关键.3.(3分)如图,把下列图形折成一个正方体的盒子,折好后与“礼”相对的字是( )A.雅B.教C.集D.团【分析】正方体的表面展开图,相对的面之间一定相隔一个正方形,根据这一特点作答.【解答】解:这是一个正方体的平面展开图,共有六个面,其中面“礼”与面“集”相对,面“雅”与面“教”相对,面“育”与面“团”相对.故选:C.【点评】本题考查了正方体相对两个面上的文字,注意正方体的空间图形,从相对面入手,分析及解答问题.4.(3分)已知a x b2与ab y的和是a x b y,则(x﹣y)y等于( )A.2B.1C.﹣2D.﹣1【分析】根据同类项的定义即可求出答案.【解答】解:由题意可知:a x b2与ab y是同类项,∴x=1,y=2,∴原式=(﹣1)2=1,故选:B.【点评】本题考查同类项的概念,解题的关键是熟练运用同类型的概念,本题属于基础题型.5.(3分)下列各式正确的是( )A.19a2b﹣9ab2=10a2b B.3x+3y=6xyC.16y2﹣7y2=9D.2x﹣5x=﹣3x【分析】根据合并同类项的法则进行计算即可.【解答】解:A、19a2b﹣9ab2,不能合并,故错误;B、3x+3y,不能合并,故错误;C、16y2﹣7y2=9y2,故错误;D、2x﹣5x=﹣3x,故正确;故选:D.【点评】本题考查了合并同类项,掌握合并同类项的法则是解题的关键.6.(3分)某同学用剪刀沿直线将一片平整的银杏叶剪掉一部分(如图),发现剩下的银杏叶的周长比原银杏叶的周长要小,能正确解释这一现象的数学知识是( )A.两点之间线段最短B.两点确定一条直线C.垂线段最短D.经过直线外一点,有且只有一条直线与这条直线平行【分析】根据两点之间,线段最短进行解答.【解答】解:某同学用剪刀沿直线将一片平整的银杏叶剪掉一部分(如图),发现剩下的银杏叶的周长比原银杏叶的周长要小,能正确解释这一现象的数学知识是两点之间线段最短.故选:A.【点评】此题主要考查了线段的性质,关键是掌握两点之间,线段最短.7.(3分)如图,C是AB的中点,D是BC的中点,下列等式不正确的是( )A.CD=AD﹣BC B.CD=AC﹣DB C.CD=AB D.CD=AB﹣DB【分析】根据线段中点的定义可判断.【解答】解:∵C是AB的中点,D是BC的中点∴AC=BC=AB,CD=BD=BC∵CD=AD﹣AC∴CD=AD﹣BC故A正确∵CD=BC﹣DB∴CD=AC﹣DB故B正确∵AC=BC=AB,CD=BD=BC∴CD=AB故C错误∵CD=BC﹣DB∴CD=AB﹣DB故D正确故选:C.【点评】本题考查了两点之间的距离,熟练掌握线段中点的定义是本题的关键.8.(3分)下列解方程步骤正确的是( )A.由2x+4=3x+1,得2x﹣3x=1+4B.由7(x﹣1)=3(x+3),得7x﹣1=3x+3C.由0.2x﹣0.3=2﹣1.3x,得2x﹣3=2﹣13xD.由,得2x﹣2﹣x﹣2=12【分析】根据解一元一次方程的基本步骤逐一判断即可得.【解答】解:A、由2x+4=3x+1,得2x﹣3x=1﹣4,此选项错误;B、由7(x﹣1)=3(x+3),得7x﹣7=3x+9,此选项错误;C、由0.2x﹣0.3=2﹣1.3x,得2x﹣3=20﹣13x,此选项错误;D、由,得2x﹣2﹣x﹣2=12,此选项正确;故选:D.【点评】本题主要考查解一元一次方程,解题的关键是掌握解一元一次方程的基本步骤.9.(3分)如图,AB∥CD,直线EF分别与直线AB,CD相交于点G,H,已知∠3=50°,GM平分∠HGB交直线CD于点M,则∠1等于( )A.60°B.80°C.50°D.130°【分析】根据平行线的性质与∠3=50°,求得∠BGM=50°,由GM平分∠HGB交直线CD 于点M,得出∠BGF的度数,再根据邻补角的性质求得∠1的度数.【解答】解:∵AB∥CD,∴∠BGM=∠3=50°,∵GM平分∠HGB,∴∠BGF=100°,∴∠1=180°﹣100°=80°.故选:B.【点评】本题主要考查了平行线的性质,两直线平行,内错角相等;以及角平分线的定义.10.(3分)在雅礼社团年会上,各个社团大放光彩,其中话剧社52人,舞蹈社38人要外出表演,现根据演出需要,从舞蹈社中抽调了部分同学参加话剧社,使话剧社的人数恰好是舞蹈社的人数的3倍.设从舞蹈队中抽调了x人参加话剧社,可得正确的方程是( )A.3(52﹣x)=38+x B.52+x=3(38﹣x)C.52﹣3x=38+x D.52﹣x=3(38﹣x)【分析】设从舞蹈队中抽调了x人参加话剧社,由抽调后话剧社的人数恰好是舞蹈社的人数的3倍,即可得出关于x的一元一次方程,此题得解.【解答】解:设从舞蹈队中抽调了x人参加话剧社,根据题意得:52+x=3(38﹣x).故选:B.【点评】本题考查了由实际问题抽象出一元一次方程,找准等量关系,正确列出一元一次方程是解题的关键.11.(3分)如图,在△ABC中,∠A=90°,点D在AC边上,DE∥BC,若∠1=155°,则∠B的度数为( )A.45°B.55°C.65°D.75°【分析】先根据补角的定义求出∠CDE的度数,再由平行线的性质求出∠C的度数,根据余角的定义即可得出结论.【解答】解:∵∠1=155°,∴∠CDE=180°﹣155°=25°.∵DE∥BC,∴∠C=∠CDE=25°.∵∠A=90°,∴∠B=90°﹣25°=65°.故选:C.【点评】本题考查的是平行线的性质,用到的知识点为:两直线平行,内错角相等.12.(3分)如图,都是由边长为1的正方体叠成的立体图形,例如第(1)个图形由1个正方体叠成,第(2)个图形由4个正方体叠成,第(3)个图形由10个正方体叠成,依次规律,第(7)个图形由( )个正方形叠成.A.86B.87C.85D.84【分析】根据图形的变换规律,可知第n个图形中的正方体的个数为1+3+6+…+,据此可得第(7)个图形中正方体的个数.【解答】解:由图可得:第(1)个图形中正方体的个数为1;第(2)个图形中正方体的个数为4=1+3;第(3)个图形中正方体的个数为10=1+3+6;第(4)个图形中正方体的个数为20=1+3+6+10;故第n个图形中的正方体的个数为1+3+6+…+,第(7)个图形中正方体的个数为1+3+6+10+15+21+28=84.故选:D.【点评】本题主要考查了图形变化类问题以及正方体,解决问题的关键是依据图形得到变换规律.解题时注意:第n个图形中的正方体的个数为1+3+6+…+.二、填空题(每题3分,共18分)13.(3分)一个角的补角比这个角的余角的2倍大18°,则这个角的度数为 18° .【分析】设这个角的度数为x,根据余角和补角的定义、结合题意列出方程,解方程即可.【解答】解:设这个角的度数为x,由题意得,180°﹣x=2(90°﹣x)+18°,解得,x=18°,故答案为:18°.【点评】本题考查的是余角和补角,如果两个角的和等于90°,就说这两个角互为余角;如果两个角的和等于180°,就说这两个角互为补角.14.(3分)若a的相反数是﹣3,b的绝对值是4,且|b|=﹣b,则a﹣b= 7 .【分析】利用相反数,绝对值的代数意义求出a与b的值,代入原式计算即可求出值.【解答】解:根据题意得:a=3,b=﹣4,则原式=3﹣(﹣4)=3+4=7,故答案为:7【点评】此题考查了有理数的减法,以及相反数,绝对值,熟练掌握各自的性质是解本题的关键.15.(3分)已知代数式x﹣3y﹣1的值为3,则代数式5+6y﹣2x的值为 ﹣3 .【分析】首先求出x﹣3y的值是多少,然后把它代入5+6y﹣2x,求出算式的值为多少即可.【解答】解:∵x﹣3y﹣1=3,∴x﹣3y=4,∴5+6y﹣2x=5﹣2(x﹣3y)=5﹣2×4=5﹣8=﹣3故答案为:﹣3.【点评】此题主要考查了代数式求值问题,要熟练掌握,求代数式的值可以直接代入、计算.如果给出的代数式可以化简,要先化简再求值.题型简单总结以下三种:①已知条件不化简,所给代数式化简;②已知条件化简,所给代数式不化简;③已知条件和所给代数式都要化简.16.(3分)如果线段AB=5cm,BC=4cm,且A、B、C三点在同一条直线上,则AC= 1cm 或9cm .【分析】分类讨论:C在线段AB上,C在线段AB的延长线上,根据线段的和差,可得答案.【解答】解:当C在线段AB上时,由线段的和差,得AC=AB﹣BC=5﹣4=1(cm);当C在线段AB的延长线上时,由线段的和差,得AC=AB+BC=5+4=9(cm),故答案为:1cm或9cm.【点评】本题考查了两点间的距离,分类讨论是解题关键,以防漏掉.17.(3分)如图,直线a∥b,直角三角形ABC的直角顶点C在直线b上,∠1=20°,∠2=2∠A,则∠A= 35° .【分析】根据平角等于180°列式计算得到∠3,根据两直线平行,同位角相等可得∠3=∠2,进而得到∠A的度数.【解答】解:∵∠1=20°,∠ACB=90°,∴∠3=90°﹣∠1=70°,∵直线a∥b,∴∠2=∠3=70°,又∵∠2=2∠A,∴∠A=35°,故答案是:35°.【点评】本题考查了平行线的性质,平角的定义,熟记性质并准确识图是解题的关键.18.(3分)按照下列程序计算输出值为2018时,输入的x值为 202 .【分析】利用计算程序得到2(5x﹣1)=2018,然后解关于x的方程即可.【解答】解:根据题意得2(5x﹣1)=2018,5x﹣1=1009,所以x=202.故答案为202.【点评】本题考查了有理数混合运算:先算乘方,再算乘除,最后算加减;同级运算,应按从左到右的顺序进行计算;如果有括号,要先做括号内的运算.也考查了一元一次方程的应用,三、解答题(本大题有8个小题,共66分)19.(8分)计算:(1)(﹣+﹣)×(﹣12)(2)﹣|﹣5|×(﹣12)﹣4÷(﹣)2.【分析】(1)运用乘法的分配律计算可得;(2)根据有理数的混合运算顺序和法则计算可得.【解答】解:(1)原式=(﹣)×(﹣12)+×(﹣12)+(﹣)×(﹣12)=2﹣9+5=﹣2;(2)原式=﹣5×(﹣1)﹣4×4=5﹣16=﹣11.【点评】本题主要考查有理数的混合运算,解题的关键是熟练掌握有理数的混合运算顺序和法则.20.(8分)解方程:(1)2x+3=12﹣3(x﹣3)(2)【分析】(1)方程去括号,移项合并,把x系数化为1,即可求出解;(2)方程去分母,去括号,移项合并,把x系数化为1,即可求出解.【解答】解:(1)去括号得:2x+3=12﹣3x+9,移项合并得:5x=18,解得:x=3.6;(2)去分母得:9x﹣6=24﹣8x+4,移项合并得:17x=34,解得:x=2.【点评】此题考查了解一元一次方程,熟练掌握运算法则是解本题的关键.21.(6分)先化简,再求值,x2﹣3(2x2﹣4y)+2(x2﹣y),其中|x+2|+(5y﹣1)2=0【分析】原式去括号合并得到最简结果,利用非负数的性质求出x与y的值,代入计算即可求出值.【解答】解:原式=x2﹣6x2+12y+2x2﹣2y=﹣3x2+10y,∵|x+2|+(5y﹣1)2=0,∴x=﹣2,y=,则原式=﹣12+2=﹣10.【点评】此题考查了整式的加减﹣化简求值,以及非负数的性质,熟练掌握运算法则是解本题的关键.22.(8分)如图,在△ABC中,GD⊥AC于点D,∠AFE=∠ABC,∠1+∠2=180°,∠AEF=65°,求∠1的度数.解:∠AFE=∠ABC(已知)∴ EF∥BC (同位角相等,两直线平行)∴∠1=∠ EBC (两直线平行,内错角相等)∠1+∠2=180°(已知)∴ ∠EBC+∠2=180° (等量代换)∴EB∥DG 同旁内角互补,两直线平行 ∴∠GDE=∠BEA 两直线平行,同位角相等 GD⊥AC(已知)∴ ∠GDE=90° (垂直的定义)∴∠BEA=90°(等量代换)∠AEF=65°(已知)∴∠1=∠ BEA ﹣∠ AEF =90°﹣65°=25°(等式的性质)【分析】根据平行线的性质和判定可填空.【解答】解:∠AFE=∠ABC(已知)∴EF∥BC(同位角相等,两直线平行)∴∠1=∠EBC(两直线平行,内错角相等)∠1+∠2=180°(已知)∴∠EBC+∠2=180°(等量代换)∴EB∥DG (同旁内角互补,两直线平行)∴∠GDE=∠BEA (两直线平行,同位角相等)GD⊥AC(已知)∴∠GDE=90°(垂直的定义)∴∠BEA=90°(等量代换)∠AEF=65°(已知)∴∠1=∠BEA﹣∠AEF=90°﹣65°=25°(等式的性质)故答案为:EF∥BC,∠EBC,∠EBC+∠2=180°,同旁内角互补,两直线平行,两直线平行,同位角相等,∠GDE,∠BEA,∠AEF.【点评】本题考查了平行线的判定和性质,灵活运用平行线的性质和判定解决问题是本题的关键.23.(8分)如图:∠BCA=64°,CE平分∠ACB,CD平分∠ECB,DF∥BC交CE于点F,求∠CDF和∠DCF的度数.【分析】根据角平分线的定义可求∠BCF的度数,再根据角平分线的定义可求∠BCD和∠DCF的度数,再根据平行线的性质可求∠CDF的度数.【解答】解:∵∠BCA=64°,CE平分∠ACB,∴∠BCF=32°,∵CD平分∠ECB,∴∠BCD=∠DCF=32°,∵DF∥BC,∴∠CDF=∠BCD=32°.【点评】考查了角平分线的定义,平行线的性质,关键是熟悉两直线平行,内错角相等的知识点.24.(8分)中雅七年级(1)班想买一些运动器材供班上同学阳光体育课件使用,班主任安排班长去商店买篮球和排球,下面是班长与售货员的对话:班长:阿姨,您好!售货员:同学,你好,想买点什么?(1)根据这段对话,你能算出篮球和排球的单价各是多少吗?(2)六一儿童节店里搞活动有两种套餐,1、套装打折:五个篮球和五个排球为一套装,套装打八折:2、满减活动:999减100,1999减200;两种活动不重复参与,学校打算买15个篮球,13个排球作为奖品,请问如何安排更划算?【分析】(1)设篮球的单价为x元/个,排球的单价为y元/个,根据每个排球比每个篮球便宜30元及570元购买3个篮球和5个排球,即可得出关于x、y的二元一次方程组,解之即可得出结论;(2)分别求出按套装打折购买及按满减活动购买所需费用,比较后即可得出结论.【解答】解:(1)设篮球的单价为x元/个,排球的单价为y元/个,根据题意得:,解得:.答:篮球的单价为90元/个,排球的单价为60元/个.(2)按套装打折购买需付费用为:10×(90+60)×0.8+5×90+3×60=1830(元),按满减活动购买需付费用为:15×90+13×60﹣200=1930(元).∵1830<1930,∴按套装打折购买更划算.【点评】本题考查了二元一次方程组的应用,解题的关键是:(1)找准等量关系,正确列出二元一次方程组;(2)分别求出按套装打折购买及按满减活动购买所需费用.25.(10分)“幸福是奋斗出来的”,在数轴上,若C到A的距离刚好是3,则C点叫做A 的“幸福点”,若C到A、B的距离之和为6,则C叫做A、B的“幸福中心”(1)如图1,点A表示的数为﹣1,则A的幸福点C所表示的数应该是 ﹣4或2 ;(2)如图2,M、N为数轴上两点,点M所表示的数为4,点N所表示的数为﹣2,点C 就是M、N的幸福中心,则C所表示的数可以是 ﹣2或﹣1或0或1或2或3或4 (填一个即可);(3)如图3,A、B、P为数轴上三点,点A所表示的数为﹣1,点B所表示的数为4,点P所表示的数为8,现有一只电子蚂蚁从点P出发,以2个单位每秒的速度向左运动,当经过多少秒时,电子蚂蚁是A和B的幸福中心?【分析】(1)根据幸福点的定义即可求解;(2)根据幸福中心的定义即可求解;(3)分两种情况列式:①P在B的右边;②P在A的左边讨论;可以得出结论.【解答】解:(1)A的幸福点C所表示的数应该是﹣1﹣3=﹣4或﹣1+3=2;(2)4﹣(﹣2)=6,故C所表示的数可以是﹣2或﹣1或0或1或2或3或4;(3)设经过x秒时,电子蚂蚁是A和B的幸福中心,依题意有①8﹣2x﹣4+(8﹣2x+1)=6,解得x=1.75;②4﹣(8﹣2x)+[﹣1﹣(8﹣2x)]=6,解得x=4.75.故当经过1.75秒或4.75秒时,电子蚂蚁是A和B的幸福中心.【点评】本题考查了数轴及数轴上两点的距离、动点问题,熟练掌握动点中三个量的数量关系式:路程=时间×速度,认真理解新定义.26.(10分)已知AM∥CN,点B为平面内一点,AB⊥BC于B(1)如图1,直接写出∠A和∠C之间的数量关系;(2)如图2,过点B作BD⊥AM于点D,求证:∠ABD=∠C;(3)如图3,在(2)问的条件下,点E、F在DM上,连接BE、BF、CF,BF平分∠DBC,BE平分∠ABD,若∠FCB+∠NCF=180°,∠ABF=2∠ABE,求∠EBC的度数.【分析】(1)根据平行线的性质以及直角三角形的性质进行证明即可;(2)先过点B作BG∥DM,根据同角的余角相等,得出∠ABD=∠CBG,再根据平行线的性质,得出∠C=∠CBG,即可得到∠ABD=∠C;(3)先过点B作BG∥DM,根据角平分线的定义,得出∠ABF=∠GBF,再设∠DBE=α,∠ABF=β,根据∠CBF+∠BFC+∠BCF=180°,可得(2α+β)+3α+(3α+β)=180°,根据AB ⊥BC,可得β+β+2α=90°,最后解方程组即可得到∠ABE=15°,进而得出∠EBC=∠ABE+∠ABC=15°+90°=105°.【解答】解:(1)如图1,∵AM∥CN,∴∠C=∠AOB,∵AB⊥BC,∴∠A+∠AOB=90°,∴∠A+∠C=90°;(2)如图2,过点B作BG∥DM,∵BD⊥AM,∴DB⊥BG,即∠ABD+∠ABG=90°,又∵AB⊥BC,∴∠CBG+∠ABG=90°,∴∠ABD=∠CBG,∵AM∥CN,BG∥AM,∴CN∥BG,∴∠C=∠CBG,∴∠ABD=∠C;(3)如图3,过点B作BG∥DM,∵BF平分∠DBC,BE平分∠ABD,∴∠DBF=∠CBF,∠DBE=∠ABE,由(2)可得∠ABD=∠CBG,∴∠ABF=∠GBF,设∠DBE=α,∠ABF=β,则∠ABE=α,∠ABD=2α=∠CBG,∠GBF=β=∠AFB,∠BFC=3∠DBE=3α,∴∠AFC=3α+β,∵∠AFC+∠NCF=180°,∠FCB+∠NCF=180°,∴∠FCB=∠AFC=3α+β,△BCF中,由∠CBF+∠BFC+∠BCF=180°,可得(2α+β)+3α+(3α+β)=180°,①由AB⊥BC,可得β+β+2α=90°,②由①②联立方程组,解得α=15°,∴∠ABE=15°,∴∠EBC=∠ABE+∠ABC=15°+90°=105°.【点评】本题主要考查了平行线的性质的运用,解决问题的关键是作平行线构造内错角,运用等角的余角(补角)相等进行推导.余角和补角计算的应用,常常与等式的性质、等量代换相关联.解题时注意方程思想的运用.。

2018-2019学年度人教版七年级数学阶段一试题+答案

2018-2019学年度人教版七年级数学阶段一试题+答案

(2)C、B 两点间的距离是 6-2.5=3.5, !!!!!!!!!!!!!!!!! 6 分
C、D 两点间距离是 6-(-4)=10. !!!!!!!!!!!!!!!!!!! 8 分
19. 解:由题意得 a+b=0,mn=1,x=2 或-2, !!!!!!!!!!!!!!!! 3 分
当 x=2 时,原式=-2×1+0-2=-2-2=-4; !!!!!!!!!!!!!!!! 6 分
1 40×41
=%%%%%%%%%%%%%%%%%%%%;(不必计算结果)
(2)直接写出下列各式的计算结果:
① 1 + 1 + 1 +…+
1
=%%%%%%%%%%%%%%%%%;
1×2 2×3 3×4
2017×2018
② 1 + 1 + 1 +…+ 1 =%%%%%%%%%%%%%%%%%%;
1×3 3×5 5×7
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 3 分
答:守门员最后回到了球门线的位置. !!!!!!!!!!!!!!!! 4 分
(2)由观察可知:5-3+10=12(米). !!!!!!!!!!!!!!!!!! 6 分
答:在练习过程中,守门员离开球门线最远距离是 ቤተ መጻሕፍቲ ባይዱ2 米. !!!!!!!! 7 分
.
14. 已知 x(x>0)的绝对值为 2,y 与 3 互为相反数,则 2x+y=
.
15. 对于任意两个不相等的有理数 a,b,定义运算如下:a☆b=(a+b)÷(a-b),那么 3☆5 的值


三、解答题(本大题共 8 小题,共 75 分,解答应写出文字说明、证明过程或演算步骤)

2018-2019学年第一学期教学质量检测七年级政治参考答案

2018-2019学年第一学期教学质量检测七年级政治参考答案

2018—2019学年第一学期教学质量检测七年级道德与法治参考答案及评分标准注意事项:1. 本试卷分为单项选择、多项选择、辨析、观察与思考、活动与探索五种题型,全卷满分为100分。

2. 评卷时应根据参考答案、评分标准和考生答题实际制订出相应的评分细则。

3. 评卷时应尊重考生的主体地位和个性特点,鼓励创新,采意给分。

学生主观题答案若与本参考答案不一致时,只要符合题意,言之有理,均可在本题规定的分值范围内酌情给分。

一、单项选择(10小题,每题2分,共20分。

下列每小题的四个选项中,只有一项是最符合题意的)1.A 2.D 3.C 4.B 5.B 6.C 7.A 8.B 9.D 10.C二、多项选择(5小题,每题3分,共15分。

下列每小题的四个选项中,至少有两项是符合题意的。

多选、错选均不得分。

少选者:若有两个正确选项,只选一项者得1.5分;若有三个正确选项,每选一项得1分;若有四个正确选项,选三项者得2分,选一、二项者均得1分)11.CD 12.ABC 13.ABCD 14.CD 15.AD三、辨析(12分,仅作判断不说明理由者不得分)16.(1)生活的道路并不总是平坦的,在我们怀揣美好的愿望、目标、期待去努力的过程中,难免会遇到一些阻碍、失利乃至失败,这就是挫折,生活难免有挫折。

或:挫折是成长中不可避免的,是普遍存在的,每个人都会遇到,是我们生命成长的一部分。

(3分)(2)面对挫折,我们可能会产生烦恼、失落、焦虑、难过、愤怒、不满等负面的情绪感受。

如果一味沉浸在负面情绪中,就容易消沉,甚至做出不恰当的行为。

我们需要及时调整自己,正确认识、对待挫折并战胜挫折。

(3分)(3)每个人的生命都蕴含一定的承受力、自我调节和自我修复的能力,我们需要发现、发掘自己的生命力量,增强生命的韧性,逐渐培养自己面对困难、挫折的勇气和坚强的意志。

或:我们可以运用科学的方法,如通过欣赏、培养幽默感,和自己信任的人谈一谈,考虑并接受最糟糕的结果,关心、帮助他人,培养某方面的兴趣等途径,来增强生命的韧性和力量,应对和战胜挫折。

浙教版初中数学七年级上册形成性评估试题参考答案

浙教版初中数学七年级上册形成性评估试题参考答案

初中数学七年级上册形成性评估试题参考答案一、第一章《从自然数到有理数》单元测试题1.1 2.-2 3.-1 4.>,<,=; 5.中国、意大利 ;意大利;日本 6.1或-5 7.a c b << 8. 0 2± 0 9.B 10.C 11.A 12.B 13.C 14.A15.D 16.B 17.(1)1;(2)4;(3)3;(4)25918.数轴略,-4<-1<0<1.5<3 19.正整数:﹛3,11…﹜ 分数:﹛23-,1.5,0.62,215-,3.14 …﹜ 整数:﹛3,-2,11,-15,0…﹜ 负数:﹛23-,-2, -125,-15…﹜20.第4个足球质量好些,最大的比最小的大68克. 21.(1)111,,789--(2)20091-,最后与0越来越接近.22. A 23.B 24.0 25.4 5或5- 26.1- 5.1- 5.0 C二、七(上)第2章《有理数的运算》单元测试题1.51-2.5.432³1053.4+12-8-9 4.0,1;0,1,-1 5.日,一 6.9;8-;18- 7.4100.3⨯ 8.2062 9.B 10.B 11.C 12.B 13.D 14.D 15.B 16.C 17.6;-9;-36;23 18.有五面旗:分别为①⑤⑥⑦⑧;有四朵花②③④⑨ 19.121;12321;1234321;略 20.第六个;原出发点的西边,距离19千米;30升 21.方案二最省;因为方案一需要1500元,方案二需要1440元,方案三需要1800元 22.C 23.1003;1004 24.49 25.0.三、七(上)第3章《实数》单元测试题1.±5 ,4,0 2.3,2-,1.0 3.16.15 4.12 5.2,5,2 6.±7 7.π等(答案不唯一)8.个2008555 9.C 10.D 11.D 12.B 13.B 14.A 15.A 16.B 17.(1)43.11;(2)0.88 18.略; 19.买50cm ³50cm 的地砖,5.010025= 20.约6.3cm 21.面积为8,边长为8 22.答案不唯一 23.21,21-+等(答案不唯一) 24.21+ 25.5四、七(上)第4章《代数式》单元测试题1.-32;2 2.10%a 3.2a-b 4.2 5.x+5 6.2m 3+2m+1(答案不唯一) 7.2a 28.16,3n-2 9.C 10.B 11.C 12.C 13.C 14.D 15.C16.D 17.(1)2x-4y (2)x+y-2b 18.(1)-21;(2)2 19.4.2x-5,100 20.(1)S=23-5x ²x (2)当x=1时,S=1;当x=54时,S=1.04;当x=53时,S=0.96,∴取x=54时所围成的面积最大 21.(1)A 的费用:4.2x 元;B 的费用:(1.2x+50)元;(2)当x=20时,A 的费用:84元;B 的费用74元,∴采用包月制较为合算 22.18 23.设这两位数的个位数字为x ,十位数字为y ,则这两位数为10y+x ,新两位数为10x+y ∴(10y+x )-(10x+y )=10y+x-10x-y=9y-9x=9(y-x )即能被9整除五、期中自测(一)(第1、2、3、4章)1.1 2.-4 3. ±4 4.380,390 5.千分 6.0 7.5 8.3 9.7 10. -1或5 11.C 12.C 13.B 14.B 15..A 16.D 17.B 18.B19.整数集合:{5,-4,171,0…}负数集合:{1,4, 2.14--…}负分数集合:{1, 2.14--…}20.(1)10;(2)-5;(3)1≈4.2021.(1)2x-1;(2)22712a b ab c --- 22.2373x x --+,5 23.若使用峰谷电,需106.4元,若不使用峰谷电,需121.9元,所以使用峰谷电合算 24.4,7,10,每增加一个方格需增加3根火柴,要搭n 个方格,需(3n+1)根火柴 25.设原先各有牌n 张 ,则最终乙手中的牌的张数为n+4+2-(n-2)=8(张) 26.(1)青年旅行社:(1500+250m)元,华夏旅行社:(400m+1200)元,(2)∵m ≥3 ∴去青年旅行社合算六、七(上)期中自测题(二)(第1、2、3、4章测试题)1.-300 2.b a 1+- 3.b a +10 4.0.090 5.π31- ,3 6.±2,31- 7.-1 8.20-0.04n ,14 9.D 10.B 11.C 12.C 13.D 14.C15.B 16.D 17.A 18.D 19.略 20.(1)-73;(2)4 21.24)]2(1[)]3(5[=--⨯--或24)3()2()15(=-⨯-⨯- 22.解:(1)y x xy 2- 当1-=x ,2=y 时原式42)1(212-=⨯--⨯-= (2)由已知得3±=a ,2±=b b a < 2,3-=-=∴b a 或2,3=-=b a 当2,3-=-=b a 时 1222=+-b ab a 当2,3=-=b a 时 25222=+-b ab a23.化简得-2y 3与字母x 的取值无关 24.2h m;不健康的瘦 25.能回到原出发点;O 点的右边12cm 的地方;54粒芝麻 26.10.5m 元;108m 元;0<x <100时为1.05mx 元,x ≥100时为0.9mx 元七、七(上)第5章《一元一次方程》单元测试题1.x=10 2.2 3.56x =-4.1 5.1,4,x=3 6.4,2 7.-1 8.17,13 9.D 10.A 11.D 12.B 13.B 14.C 15.A 16.C 17.⑴x=-2; ⑵x=-1;⑶x=2 18.略 19.10 20.设小明一年前存入x 元,则x+2.25%(1-20%)x=16288,x=16000 21.略(答案不唯一) 22. ⑴上下相邻两数相差16,左右相邻两数相差2,也有这种规律;⑵a-2,a ,a+1,a-16,a+16;⑶a=402,不能,因为数表是奇数 23.设失地农民中自主创业连续经营一年以上的有x 人,则根据题意列出方程1000x+(60-x)(1000+2000)=100000 解得:x=40所以60-x=60-40=20答:失地农民中自主创业连续经营一年以上的有40人,自主创业且解决5人以上失业人员稳定就业一年以上的农民有20人.八、第七章《图形的初步认识》单元测试题1.5 2 .两点之间,线段最短 3.33016。

2018-2019学年七年级英语上册全册单元测试卷及答案

2018-2019学年七年级英语上册全册单元测试卷及答案

2018-2019学年七年级英语上册Unit1单元测试卷(分数:100分时间:90分钟)第Ⅰ卷听力部分(15分)Ⅰ.听句子,选择与其意思相符的图片(有两幅多余图片)(5分)1. 2. 3. 4. 5.Ⅱ.听句子,选择正确答语(5分)6.A.How do you do? B.How are you? C.Fine, thank you.7.A.It’s Smith. B.It’s Jenny. C.It’s Jim.8.A.My telephone number is 120-8978.B.His telephone number is 120-8978.C.Her telephone number is 120-8978.9.A.Grace. B.John. C.Alice.10.A.Hello, Kim. B.Goodbye, Kim. C.You’re welcome.Ⅲ.听对话,填写下面的身份证(5分)TELEPHONENUMBER:15第Ⅱ卷笔试部分(85分)Ⅳ.单项选择(10分)16.—Is he Bill?—.His name is Bob.A.Yes,he isn’tB.No,he isC.Yes,he isD.No,he isn’t17. is Tom.A.I’m;MyB.Her;MyC.I’m;HisD.My;I’m18.—What’s his name?—.A.His Li YangB.Is Li YangC.He is Li YangD.Is he Li Yang19.—Nice to meet you.—A.I’mfine,thanks.B.How are you?C.Good morning.D.Nice to meet you,too.20.This is a boy.His name is .A.ZhaoHaitaoB.ZhaoHaiTaoC.ZhaohaitaoD.Zhaohaitao21.—What four and five?— nine.A.are;They areB.is;It’sC.is;ItsD.are;It’s22.— you Kate Green?—No, my name Mary Green.A.Is;amB.Are;isC.Are;amD.Is;is23.—What’s her telephone number?—.A.It’s 786-1356B.It’************C.I’m 88567301D.I’m Jenny24.My name’s Alex Cooper.Alex is my name.Cooper is myname.A.first;lastst;firstC.second;familyD.family;first25.This is ID card,but it’s not card.A.a;yourB.an;youC.an;yourD.a;youⅤ.完形填空(10分)Mary Smith 26 a girl.27 is a student.28 is 29 last name and Mary is her 30name.Her31 number is 806-8027 and her ID number 32 8283928655.Her mother 33 a worker.She and 34 mother 35the same.26.A.am B.are C.is D.aren’t27.A.she B.She C.He D.I28.A.Mary B.Smith C.Mary Smith D.Smith Mary29.A.her B.she C.she’s D.his30.A.family st C.middle D.first31.A.phone B.ID C.bus D.card32.A.is B.am C.are D.am not33.A.are B.is C.am D.aren’t34.A.her B.Her C.his D.His35.A.look B.look at C.are D.isⅥ.阅读理解(20分)A36.Smith is last name.A.Dale’sB.Eric’sC.Jane’sD.Linda’s37.What’s Dale’s telephone number?A.398-5117.B.278-1567.C.281-9176.D.535-2375.38.is Linda’s last name.A.BrownB.SmithC.GreenD.Hand39. boys are in the table (表格).A.TwoB.ThreeC.FourD.Five40.Which of the following is NOT true (下列哪项陈述是错误的)?A.Dale’s last name is Brown.B.Hand is Eric’s last name.C.Linda’s telephone number is 281-9176.D.535-2375 is Jane’s telephone number.B阅读下面的两段独白, 然后按照要求完成任务。

2018-2019北师七年级阶段一数学答案

2018-2019北师七年级阶段一数学答案
山西省 2018-2019 学年第一学期七年级阶段一质量评估试题
数学(北师版)参考答案和评分标准
一、选择题(每小题 3 分,共 30 分)
题 号 1 2 3 4 5 6 7 8 9 10 选项 D A B B D B A A C D
二、填空题(每小题 3 分,共 15 分)
11. 水位上升 1.2 米 12. 易拉罐 13. 长方形 14. 300
…………………………………………………………… 3 分
答:小明剪出后的纸片的面积是 550 cm2. ……………………………………… 4 分
(2)答:能做成一个长方体盒子. ………………………………………………… 5 分
10 cm 5 cm
15 cm
……………………………………………… 7 分
所以,上图为所求的图形. ……………………………………………………… 8 分
30×22=120(cm2).
答:需要喷漆的面积一共是 120 cm2. …………………………………………… 12 分
七年级数学(北师版) 答案 第 3 页 (共 3 页)
=(-4-26)+17 …………………………………………………………… 6 分
=-30+17
……………………………………………………………… 7 分
=-13. …………………………………………………………………… 8 分
(3)原式=3-4+9-2 ……………………………………………………………… 9 分
15. 2022
三、解答题(本大题共 8 小题,共 75 分)
16. 解:(1)原式=-3+5 ………………………………………………………………… 2 分

2018-2019学年度第一学期七年级学生学业质量调研测试

2018-2019学年度第一学期七年级学生学业质量调研测试

2018-2019学年度第一学期七年级学生学业质量调研测试语文参考答案一、基础 (24分)1.根据课文默写古诗词(10分)。

(1)好之者不如乐之者(2)杨花榆荚无才思(3)河流大野犹嫌束,山入潼关不解平。

(4)海日生残夜,江春入旧年(5)杨花落尽子规啼,闻道龙标过五溪。

我寄愁心与明月,随风直到夜郎西。

2.(4分)粗犷鉴赏刨根问底大相径庭3.(3分)C 不毛之地(“不毛之地”是指不生长草木庄稼的荒地,形容荒凉、贫瘠。

不能形容干净的房间。

)4.(3分)D本题考查病句修改。

第1句“大约”与“以上”矛盾,可删掉其中一个;第2句语序不当,“不但……而且……”表递进关系,应当先说小范围后说大范围,把“全球”与“我国”互换位置;第3句成分残缺,应在结尾处加“的国家”;第4句搭配不当,“实现”与“世界科技高峰”不搭配,可把“实现”改为“攀登”。

5.(4分)参考示例:栏目1:温馨的童年回忆栏目2:理性的批判栏目3:鲁迅经典语录栏目4:我看鲁迅(或者“鲁迅”印象)栏目5:鲁迅笔下人物大家谈栏目6:阅读有感……二、阅读(46分)(一)狼(10分)6.(3分)(1)处境困迫,为难(2)从容、悠闲(3)原来是7.(4分)(1)两只狼不敢上前,瞪眼朝着屠户。

(2分)(2)另一只狼正在挖洞,想从柴草堆中打洞来从后面攻击屠户。

(2分)8.(3分) B(二)愚人食盐(9分)(译文)从前有个愚蠢的人,到朋友家。

主人给他食物,食物嫌淡而无味。

主人知道之后,于是添加盐。

加了盐,食物就味美,于是(他)自言自语说:“之所以味道鲜美,是有了盐的缘故。

很少就如此,何况又多了?”这个愚蠢的人没有智慧,就只吃盐。

味觉败坏,反而成为他的祸患。

9.(3分)D(A. 完了,罢了/已经 B.空口/天空 C.给/和 D.吃)10.(3分)所以美者/缘有盐故/少有尚尔/况复多也?11.(3分)示例:干任何事情都要有一个限度,恰到好处时美妙无比,一旦过头就会走向反面,哪怕是好事也会给弄得很糟。

18-19上七年级英语单元测试卷参考答案

18-19上七年级英语单元测试卷参考答案

18-19上七年级英语单元测试卷参考答案七年级英语上册测试卷参考答案Unit 1听力部分I. 1—5 ACBCC 6—10 AABCC11. One possible version:Hello, everyone! This is Jenny. She is 12 years old. She is from Germany. Her hobby is reading. She reads a lot of books every year. She hopes to have an e-friend from China. She likes China.12. Do you have brothers or sisters?13. Why do you like China?笔试部分II. 14—18 CBBCA 19—23 BACBC 24—28 CCAABIII. 29—33 CBACB 34—38 CABACIV. 39—42 ABCC 43—46 BAAC 47—50 DCAB 51—54 CCAB55—58 CCDDV. 59. an 60. with 61. teaches 62. our 63. andThis is Mandy’s first year as a junior high school student. Her school is beautiful. There is a big playground and a library in it. Her favourite subject is English because she wants to visit different places in the world. Her teachers are all very kind and friendly. She has many friends at school. Her best friend is Lucy. They often play games. Jenny loves her school and her school life.12. How many subjects do you have/learn at school?13. Who is your English teacher?笔试部分II. 14—18 BCBBC 19—23 ABACC 24—28 BBABBIII. 29—33 CBCAC 34—38 CBABB IV. 39—42 CBCA 43—46 DBBD 47—50 BBCB 51—5 4 ACDB55—58 AADDV. 59. shows 60. are 61. classrooms 62. is 63. takes64. to join 65. singing 66. a67. with 68. friendlyVI. 作文One possible version:Li Hua’s daily lifeLi Hua is a Grade 7 student. He gets up at 6:30 every day and has breakfast at 7:00. He goes to school at 7:30. School starts at 8:00 a.m. and ends at 4:30 p.m. There are seven classes every day. Li Hua’s favourite subject is Maths. After school, Li Hua plays football from 4:30 to 5:30. Then he goes home at 5:45. He has dinner at 6:30. From 7:00 to 9:00, he does homework. He goes to bed at 9:30.Unit 3听力部分I. 1—5 BABCC 6—10 ABCBC11. One possible version:Anna has a happy family. Her father is a doctor. He is very busy. He often watches news for half an hour every day. Her mother is a housewife. She usually watches TV for about five hours every day. Her favourite programmesare TV plays. She and her sister are students. They watch TV after school. They like watching cartoons. Her grandparents don’t like watching TV, they often listen to the radios.12. Do all of your family members often watch TV together at the weekends?13. Why don’t your grandparents like watching TV?II. 14—18 ABBBB 19—23 CCCBB 24—28 CACBAIII. 29—33 CABCC 34—38 BBCBCIV. 39—42 BACC 43—46 DCBC 47—50 CCBD 51—54 CAAD55—58 BABDV. 59. to talk 60. are 61. In 62. shopping 63. a64. sides 65. because 66. happily 67. friendly 68. will loveVI. 作文One possible version:Protect the EarthThe Earth is our home. It provides animalsand plants for us. It provides beautiful rivers and mountains for us. It provides food and places for us to live. It is important to everyone.But many people throw rubbish into the rivers and lakes. Many factories pour waste water into the sea. Many fish die. The Earth is polluted. People cut down too many trees. It is in danger now.We must stop doing these. We should throw the rubbish into the bins. We mustn’t pour dirty water into the rivers. We should plant more trees. Let’s try our best to protect the Earth. To protect it is to protect ourselves.Unit 4听力部分I. 1—5 CBACB 6—10 ABCAB11. One possible version:Tim had a picnic. He went to the beach with his parents because the weather was cool. The beach was beautiful and they played on the beach for a long time. They ate the food they took. They had a good time.12. How did you go on the picnic?13. Can I go with you next time?笔试部分II. 14—18 BABBC 19—23 CCBAB 24—28 ACCACIII. 29—33 ACBBC 34—38 CAABCIV. 39—42 CAAB 43—46 CCCB47—50 DBDD 51—5 4 CAAD55—58 DACAV. 59. nice 60. and 61. flowers 62. leaves 63. brightly64. takes 65. and 66. to catch 67. beginning 68. firstVI. 作文One possible version:Dear Jack,How are you doing these days? I’d like to tell you something about the seasons in Shenzhen.There are four seasons in Shenzhen. Spring is short and the weather is warm. People like to take a trip in spring. Summer is very hot in Shenzhen. Sometimes there is heavy rain. Peopleoften go to the beach to swim. Autumn is very cool here. It is a good time for people to go on a picnic. Winter is not cold in Shenzhen. People like to go to the north at this time of year. They want to play in the snow there. My favourite season is autumn because it is not so hot and not so cold. I can play outside.Hope to hear from you soon.ours,i HuaUnit1-Unit4听力部分I. 1—5 ACCBB 6—10 BCCBA11. One possible version:Jenny made a wonderful winter plan. She is very busy. First, She’ll do exercise every day so that she can keep healthy. Second, she wants to improve her English because her English is very poor. Third, she is going to look for a part-time job so that she can have enough money to buysomething useful. Finally, she will relax herself by watching movies so that she can learn more about the world. In a word, she thinks her winter holiday will be very meaningful.12. How do you improve your English?13. What will you buy (if you find apart-time job)?笔试部分II. 14—18 CABBA 19—23 CBACA 24—28 CBBBCIII. 29—33 BBBAC 34—38 CBBCAIV. 39—42 CCAC 43—46 ADCD 47—50 DCCB 51—54 CADD55—58 BBDCV. 59. with 60. elder 61. an 62. my 63. hobbies64. listening 65. by 66. are 67. subjects 68. to makeVI. 作文One possible version:Dear Sam,I am very happy to get your email. My name isLi Lei. I am 12 years old. I’m tall and thin, and I have short hair. My father is an engineer, my mother is a doctor and my elder sister is a student. There is a desk, a bed and some books in my bedroom. My hobbies are playing football and reading books. My favourite subjects at school are English and Maths.My dream is to be an English teacher.Best wishes,Li LeiUnit 5听力部分I. 1-5 CCCBA 6-10 CABBC11. One possible version:Jim is a healthy boy. He has fruit and vegetables every day. For breakfast, he has milk, eggs, apples, and bread. After breakfast, he goes to school on foot. He gets to school at 8 o’cloc k. For lunch, he has carrots, meat and soup. School is over at 3:30 in the afternoon. After school, he usually plays basketball with his friends. And then he goes home. After dinner, he often goesfor a walk in the park.12. Does Jim/he have brothers or sisters?13. What time does Jim/he do his homework?笔试部分II. 14—18 BBABC 19—23 CABCC 24—28 CCACBIII. 29—33 CBACA 34—38 CBCBCIV. 39—42 BBCB 43—46 BBDB 47—50 BCAD 51—54 CCAD55—58 ADACV. 59. clubs 60. like 61. flying 62. amazing 63. saw64. flying 65. their 66. but 67. badly 68. aVI. 作文One possible version:A trip plan to Shenzhen MuseumOur class will visit Shenzhen Museum to learn about the history of this city. We will meet at 8:30 a.m. on Saturday, 15th November . We will meet at our school playground. It will takeus about half an hour to get there by bus. We will listen and watch carefully, and we must write down what we will see and learn because we will write a composition after the trip. We will return at about 11:30 a.m. I can’t wait.Unit 6听力部分I. 1—5 BCCBA 6—10 CCACB11. One possible version:Beijng is one of the largest cities in the world. There are many places of interest. You can visit the Summer Palace and the Great Wall. If you like shopping, you can visit Wangfujing Street. The food in Beijing is delicious. You can try dumplings and noodles. The people are friendly. Beijing is a good place to have fun.12. Where is the Summer Palace?13. How long did you stay in Beijing?笔试部分II. 14—18 ABCAA 19—23 CBBBC 24—28 BBBCAIII. 29—33 CBACB 34—38 ABCCAIV. 39—42 CDCA 43—46 CCDB 47—50 DBBD 51—54 BBCC55—58 CBDBV. 59. drives 60. slowly 61. by 62. will be 63. him64. going 65. to travel 66. the 67. eyes 68. ButVI. 作文One possible version:Dear Wang Lin,You said that you planned to visit Shenzhen soon. Shenzhen is a modern city with many places of interest. You can visit Window of the World or Wutong Mountain. If you like shopping, you can go to Dongmen or Shopping Park. You can visit Dameisha or Xiaomeisha if you want to go to the beach. There are also many foods and snacks in Shenzhen. Tourists from all over the world come to Shenzhen every year. It is a good place to go.Hope to see you in Shenzhen.Write to me soon!Yours,Li HuaUnit 7听力部分I. 1—5 CCCBB 6—10 CABCA11. One possible version:As we all know, good health is more important than others. First, food gives us energy, so we must have enough food. Second, we should eat more fruit and vegetables, because they can provide us with vitamins. And we should eat less meat because it is fat, so we must eat the right food. Third, we’d better do morning exercise every day and do sports more often to make our bodies strong. Finally, we shouldn’t smoke or drink, for they are bad for our health. It’s important for us to have a healthy lifestyle.12. Which meal do you think is the most important, breakfast, lunch or dinner?13. When do you think is the best time to have dinner?笔试部分II. 14—18 CABCC 19—23 CCABC 24—28 BCCCBIII. 29—33 BCBAB34—38 ACCABIV. 39—42 ACDB43—46 ABCC 47—50 CBAD 51—54 CCAB55—58 CBDCV. 59. wishes 60. our 61. with 62. to do 63. will be64. exciting 65. disappeared 66. pollution 67. and 68. betterVI. 作文One possible version:My favourite clubOur school has many different kinds of clubs. After school, we will run to different clubs to enjoy our colorful lives. My favourite club is English club. Miss Wang is our club teacher. She is very kind and patient. She knows many ways of learning English. She is knowledgeable. We meet on every Wednesday afternoon in the English corner. We often speak English , readEnglish novels, listen to and sing English songs, watch English movies and so on . It’s real ly interesting. If you like English, why not join us?Unit 8听力部分I. 1—5 BBBCB 6—10 ACABC11. One possible version:My friends and I like collecting things. Lucy likes collecting stamps because she thinks it is interesting. Mark collects toy cars. His dream is to be a car engineer. Jim likes to collect CDs. He started it 2 years ago. I collect coins. I have 1,500 coins now.12. When did you start collecting coins?13. How many CDs does Jim have?笔试部分II. 14—18 CBAAB 19—23 CBBBA 24—28 BCCBCIII. 29—33 BACAB 34—38 BABACIV. 39—42 BDCB43—46 ACAD 47—50 CBCC 51—54 ACDB 55—58 BCBBV. 59. books 60. us 61. unusual62. was 63. interested 64. and65. at 66. a 67. writes 68. will comeVI. 作文One possible version:My collectionMany people like collecting things as a hobby. I like to collect stamps. Stamps are beautiful and I can learn a lot about history and Geography. I started collecting stamps when I was 8. I got a beautiful stamp from my mum as my birthday present. I have over 500 stamps now and my favourite stamp is one with a red rose on it. I like my collections very much.Unit 1-Unit 8听力部分I. 1—5 CBCAB 6—10 CBABC11. One possible version:Lisa is telling us something about herself. She is 12 years old. She has a happy family. There are 4 people in her family. Her favourite subject is Geography because she can learn more aboutthe world. Her hobbies are singing and dancing. Her dream is to be a Music teacher.12. How old is your brother?13. Who is your Music teacher?笔试部分II. 14—18 ABABA 19—23 AAACC 24—28 BACBCIII. 29—33 BABBC 34—38 CABBCIV. 39—42 BCDB43—46 CCDC 47—50 BACD 51—54 BBAB55—58 CBADV. 59. parks 60. in 61. a 62. milk 63. to sit64. saw 65. So 66. her 67. were 68. careVI. 作文One possible version:Dear Allen,I’m very happy because the winter holiday will come. Now let me tell you something about my school life.The food at school is great. I like chicken and vegetables very much. I like sports a lot. I dosports for about two hours every day. I like to play tennis and volleyball. There are many subjects in my school. The teachers and students are kind and friendly. My favourite subjects are Music and Maths. I love my school life. I learn a lot at school and it is fun and interesting.est wishes,ina。

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2018-2019学年度中山市七年级上学期生物学形成性测试题参考答案
形成性测试题(一)
一、选择题:
1—5:DBACB 6—10:BDDBC 11—15:ADCAC
16—20:BCADD 21—25:DACAC 26-30:CDCAD
二、31.(1)氧气,二氧化碳(2)生物圈生态系统(3)生物环境
(4)森林生态系统(5)食物链食物网(6)适应影响
32.(1)A:以小动物为食的鱼类B:藻类植物 C:以藻类植物为食的小动物 D:较大型肉食性鱼类(2)
B→C→A→D (3)食物链多
33.(1)生物生产者消费者分解者(2)A
(3)相对稳定自动调节能力
34.(1)草兔、狐、鼠、猫头鹰、吃虫的鸟、蜘蛛、食草昆虫、青蛙、蛇
(2)吃被吃①草→兔→狐(3)食物网(4)减少增加
35.(1)1个光(2)D (3)1 9 (4)阴暗的(5)放归大自然
形成性测试题(二)
一、选择题:
1—5:D B C B A6—10:A A C B D11—15:A B B D D
16—20:B D C B B21—25:C D C C A26-30:A D D C A
二、31.(1)染色体; DNA;蛋白质;(2)薄而透明;涂片标本;
(3)组织;器官;系统
32.(1)运输水和无机盐; C ;(2) A ;大;浓(3)B
33.(1)1 细胞壁; 5 液泡(2)2 细胞膜(3)4 细胞核;线粒体
(4)细胞壁;叶绿体
34.(1)[13]镜臂;[10]镜座(2)[1]目镜; [4]物镜
(3)[11]粗准焦螺旋;[12]细准焦螺旋(4)[9]反光镜
35.(1)③②⑤①④(2)清除口腔中的食物残渣(3)0 .9 ;防止细胞变形
(4)防止盖玻片下产生气泡(5)物镜;压碎玻片标本
36.(1)左;草履虫会避开食盐等不利刺激而向左运动(2)右;草履虫会趋向于肉汁等有利刺激而
向右运动(3)草履虫对外界的刺激会做出反应,避开不利刺激而趋向于有利刺激。

一、选择题:
1—5:ADDBD 6—10:DACBD 11—15:BDDBC
16—20:BBADB 21—25:DDCCA 26-30:BDBBD
二、简答题:
31.(1)自花传粉,异花传粉(2)被子裸子果皮种子
(3)分生区伸长区(4)叶肉叶脉
32.(1)种皮胚(2)4胚芽、1胚轴、2胚根、5子叶(3)7胚乳、否胚根(4)菜豆种
子无胚乳,有两片子叶,玉米种子有胚乳,只有一片子叶。

33.(1)受精子房果实(2)柱头花柱子房花药花丝(3)胚珠胚
34.(1)2 4 (2)1 3 保卫细胞成对(3)乙
35.(1)水分对种子萌发的影响(2)AC (3)种子数量太少
(4)种子自身条件(5)放在适宜的温度下一组置于明亮的环境
形成性测试题(四)
一、选择题:
1—5:ABBAB 6—10:CADBC 11—15:DAACC
16—20:CDBBC 21—25:DABBC 26-30:CCBAD
二、简答题:
31.(1)光合作用呼吸作用
(2)叶片叶绿体动物和人光能线粒体
(3)光
二氧化碳+ 水——→有机物+ 氧
叶绿体
(4)氧气光合碳--氧平衡
32.(1)②④⑤①③⑥(2)使叶片内的淀粉运走耗尽(3)叶绿素淀粉
(4)蓝淀粉(5)叶片在光下产生了淀粉(6)不变蓝叶绿素
33.(1)氧气(2)多强氧气(气泡)
(3)产生气泡数为0 因为在黑暗中不能进行光合作用,故实验结果是气泡数为0。

34.(1)死亡黑暗中植物不能进行光合作用,缺氧死亡。

(2)正常生活。

(3)二氧化碳氧气(4)死亡
35.(1)A 二氧化碳(2)A 氧气(3)氧气二氧化碳
(4)B组(5)根、茎、花、果
期末水平测试卷
二、简答题(除有标明的以外,其余每空1分,共40分)
41.(11分)
(1)动物其它生物水生生物(2)生物环境生物圈
(3)DNA 蛋白质(4)叶肉叶脉(5)袁隆平
42.(5分)
(1)4 细胞核(2)细胞膜
(3)细胞液 5 液泡(4)3 叶绿体
43.(5分)
(1)子房凋谢(脱落)(2)被子
(3)胚受精卵
44. (6分)
(1)森林
(2)森林蒸腾作用带走大量热量(或森林阻挡了阳光)
(3)成熟区根毛(根尖)木质部导管表皮的气孔(只答到根毛、导管、气孔也给分) (4)蒸腾
45.(7分)
(1)生产者消费者分解者(2)4 A→E→F→C
(3)生态平衡自动调节
46.(6分)
(1)水分种子的萌发需要一定的水分(2)丙组
(3)作为对照实验一般只有一个变量,而乙组和丙组有二个变量(4)光照
(5)甲组。

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