2013年七年级期中复习试题
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(命题:谢慧贞 总分120 时间120分)一, 选择题(每小题3分,共30分)1.如果零上2℃记作+2℃,那么零下3℃记作( )A.-3℃B.-2℃C.+3℃D.+2℃ 2. 下面的数中,与-3的和为0的是 ( )A.3B.-3C.31D.31-3.下列各数比-3小的数是( )A. 0B. 1C.-4D.-1 4.-2012的相反数是( )A .12012-B .12012C .-2012D .20125. 3-的绝对值是( )A .3B .3-C .13D .13-6. 61-的倒数是( )A.6B. -6C.61 D.61-7. 计算2a-a 正确的结果是( )A.-2a 2B.1C.2D.a8.用语言叙述代数式“a-21b ”所表示的数量关系,下面说法中正确的是( )A.a 与b 的差的21B. a 与b 的一半的和C. a 与b 的一半的差D. a 比b 大219.一个数的相反数是非负数,那么这个数一定是( )A .负数B .正数C . 0或负数D .0 10.下列代数式是一次式的是( )A .8B .4s+3tC .13 ahD xi一. 选择题(每小题3分,共30分) 二.填空题(每小题3分,共30分) 11. 2012-=_________.12. 计算:2-(-3)的结果是_______。
13. 据报道,2011年重庆主城区私家车拥有量近380000辆.将数380000用科学记数法表示为_______________。
14. 某校艺术班同学,每人都会弹钢琴或古筝,其中会弹钢琴的人数比会弹古筝的人数多10人,两种都会的有7人。
设会弹古筝的有m 人,则该班同学共有_______人(用含有m 的代数式表示)15.有理数m <n <0,(m+n)(m-n)的符号是_______。
16.-24的底数是_______,指数是_______,结果是_______。
17.单项式-23a 4b 的系数是_______,次数是_______。
江苏2013~2014学年第二学期期中复习测试及答案初一英语(满分:100分时间:90分钟)一、单项选择(每小题1分,共10分)( )1. September is the_______ month of a year.A. ninthB. ninethC. nineD. ninetieth( )2. _______ beef and ham shall we get?A. How longB. How manyC. How muchD. How( )3.Thereareabout_______ students in our school.A. three thousandsB. three thousands ofC. three thousand ofD. three thousand( )4. I'm looking forward_______ you at the concert tomorrow evening.A to seeing B. to see C. seeing D. see( )5. She will go there_______ underground and I will go there _______ a bus.A. by; byB. on; onC. by; onD. on; on( )6. A theatre is a good place_______ Beijing opera.A to see B. to play C. play D. see( )7, Don't_______ it in Chinese. Please_______ English.A. say; speakB. speak; sayC. say; sayD. speak; speak( )8. What kind of house do you_______?A. liveB. live inC. to liveD. to live in( )9. - What's your plan for tomorrow?-_______.A. I go to the supermarketB. I'm going to visit my uncleC. I often do my homework at homeD. I am having a good time( )10. Here's a number "twenty-three million, two hundred and sixty thousand, one hundred and one". Which of these is right?A. 230,260,101B. 23,260,101C. 23,206,110D. 23,206,101二、完形填空(每小题1分,共10分)Christmas is coming, A lot of 1 are going to town. They hope to 2 some vegetables, fruit and meat in the market. And then they are going to buy some 3 for their families. A bus comes. They try to 4 . Robert, a strong young man, rushes in first. He occupies(占) two 5 : one for his girlfriend Mabel and the other for himself.The bus starts. Robert has a look 6 the bus. He sees a lot of people 7 there.There are some old men among them He hurries to 8 his eyes. Mabel finds it and thinks he feels 9 and asks," What's wrong with you, dear?"" 10 ," answers the kind-hearted young man. "I can't bear(忍受) to see the poor old men!"( )1. A workers B. soldiers C. farmers D. drivers( )2. A lend B. sell C. borrow D. show( )3. A. books B. pens C. newspapers D. presents( )4. A. get on B. get off C. lift D. sit down( )5. A tables B. seats C. boxes D. steps( )6. A after B. for C. up D. around( )7. A standing B. sitting C. lying D. sleeping( )8. A. touch B. look over C. open D. close( )9. A terrible B. sadly C. happy D. dangerous( )10. A. Something B. Anything C. Nothing D. Everything三、阅读理解(每小题2分,共30分)AA Gold Cup for an OrangeThere is a poor man. He has an orange tree. On the tree, there are many fine oranges. One of them is very, very big. It is as big as a football. Nobody sees so big an orange. The poor man is very happy. He takes it to the king(国王). The king is so pleased(高兴) that he gives the man a lot of money for it.When a rich man hears of it, he says to himself, "It's only an orange. Why does the king give so much money for it? I'll take my gold cup to the king. He'll give me more money."The next day when the king receives(收到) the gold cup, he says to the rich man, "What a beautiful cup! I'll show you something wonderful. Please take this great orange away. "( )1. How many people are there in the story?A. Four.B. Two.C. Three.D. Five.( )2. The orange is_______.A. fine and bigB. fine and beautifulC. good and fineD. small( )3. The rich man takes his gold cup to the king for_______.A. the orangeB. the orange treeC. a footballD. money( )4. The orange is_______.A. a footballB. like a gold cupC. like a footballD. like an egg( )5. The king receives the orange and the gold cup_______.A. on the same dayB. the next dayC. every dayD. on different daysBAmerican SchoolsAmerican schools begin in September after a long summer holiday. There are two terms(学期) in a school year. The first term is from September to January, and the second is from February to June. Most American children begin to go to school when they are five years old. Most students are seventeen or eighteen years old when they finish high school.High school students only take four or five subjects(学科) each term They usually go to the same classes every day, and they have homework for every class. After class they do many interesting things.After high school, many students go to college(大学). They can go to a small one or a large one. They usually have to give a lot of money. So many college students work after class to get the money for their studies.( )6. How long is each term?A Two months. B. Three months.C. Four months.D. Five months.( )7. How old are the students when they graduate(毕业) from high school?A. Five years old.B. Seven or eight years old.C. Seventeen or eighteen years old.D. Twenty years old.( )8. How many subjects do the high school students have each term?A. Three or four.B. Five or six.C. Six or seven.D. Four or five.( ) 9. What do many high school students do after they graduate according to (根据) this passage?A. Many of them stay at home.B. Many of them go to work.C. Many of them go to college.D. We don t know.( )10. What do many college students do after class in America?A. Many of them read books after class.B. Many of them go to work to get money for their studies.C. Many of them go to parties.D. Many of them go out with their friends.CMrs Green lives in a small village. Her husband is dead, but she has one son. His name is Jack. He is twenty-one. He worked in a shop in the village and lived with his mother, but then he finds a job in a faraway town named Green Sea. He goes and lives there. Mrs Green is not happy about it.One day Mrs Green is angry. She gets on a train and goes to her son's house in Green Sea. Then she says to him, "Jack, why do you never telephone me?"Jack laughs, "But, Mother, you don't have a telephone.""No," she answers, "I don't have, but you have one!"( )11. Mrs Green's home is in_______.A. a cityB. a small villageC. Green SeaD. a big town( )12. Jack lived with his_______ when he worked in the villageA mother B. father C. brother D. sister( )13. Green Sea is_______ the small village.A. inB. next toC. nearD. far from( )14. That day Mrs Green goes to Green Sea_______.A. by bikeB. by trainC. by airD. by bus( )15. Jack doesn't telephone his mother because_______.A. he doesn't like herB. he can see her every dayC. he has no telephoneD. his mother has no telephone四、词汇(每小题1分,共15分)A根据首字母或中文提示填写单词。
2013—2014学年度第二学期七年级期中考试数学试卷1. 下列各图中,∠1与∠2是对顶角的是( )2. 如图2,点E 在AC 的延长线上,下列条件中不能判断AC ∥BD 的是() A. ∠1=∠2 B. ∠3=∠4 C. ∠D=∠DCE D. ∠D +∠ACD =180º 3. 下列方程组中,是二元一次方程组的是 ( )A .⎩⎨⎧=-=6252y x xy B.⎩⎨⎧=+=-104332y x y x C. ⎩⎨⎧+==-1312z y y x D.⎩⎨⎧=-=x y x 1124. 点(-3,-1)所在的象限是 ( ). A .第一象限 B .第二象限 C .第三象限 D .第四象限5. 将点A(2,1)向左平移2个单位长度得到点A′,则点A′的坐标是 ( ) A .(0,1) B .(2,-1) C .(4,1) D .(2,3)6. 下列四个命题中,为真命题的是:( )A.同位角相等, B.邻补角相等; C.a、b、c是直线,如果a⊥c,b⊥c;那么a∥b. D.a、b、c是直线,如果a∥c,b∥c;那么a∥b7. 如图所示的象棋盘上,若“帅”位于点(1,-2)上,“相”位于点(3,-2)上,则“炮”位于点( )A. (-1,1)B. (-2,1)C. (-1,2)D. (-2,2)8. 实数-2,0.3,17,-π中,无理数的个数有 ( )A .1个B .2个C .3个D .4个9. 如图,直线AB 与直线CD 相交于点O ,OE ⊥AB ,垂足为O ,∠EOD=21∠AOC ,则∠BOC=( )A .150°B .140°C .130°D .120°10. 观察下面图案,在A 、B 、C 、D 四幅图案中,能通过图案(1)的平移得到的是( )二.填空题(本大题共6小题,每小题4分,共24分)112=_________________12. 的立方根,那么a+b=_________________ 13.命题“对顶角相等”的题设是_______________________________, 结论是________________________________ 14. 若13=++++y x x ,则________=-y x15. 点P (3a + 6,3-a )在x 轴上,则a 的值为___________.16. 如图,都是由若干盆花组成的形如三角形的图案,则组成第10个图案所需花盆的总数是_________________1 2 3…………………………密……….封…………线………..内………….不……….要………....答…………....题…………………………学校:班级:姓名:座号:12D12C12B21A图2DA图3相帅炮第7题图OEDCBA第9题图(1) A B C D三.解答题(一)(本大题共3小题,每小题6分,共18分) 17.338492716--+-18. 这是一个动物园游览示意图.(1)试以南门为原点建立平面直角坐标系,在图中画出来;(2)分别写出以下景点的坐标. 狮子:______________ 飞禽:______________ 马:______________两栖动物:______________19. 已知:如图AB ⊥BC ,BC ⊥CD 且∠1=∠2,试说明:BE ∥CF . 解:∵AB ⊥BC ,BC ⊥CD (已知)∴________=________=90°( ) ∵∠1=∠2(已知)∴________=________(等式性质) ∴BE ∥CF ( )四. 解答题(二)(本大题共3小题,每小题7分,共21分)20.(1)平移三角形ABC,使点A在y轴上,且点C在x轴上,画出平移后的三角形,求此时B点的坐标。
七年级(下)数学期中复习测试题(2)考试时间:90分钟 试卷满分:100分 2013-4-17答题卡:题号 1 2 3 4 5 6 7 8 9 10 答案11.________ 12.________ 13.________ 14.________ 15.________ 16._________ 一、选择题(3分×10=30分)1. 如图,笑脸盖住的点的坐标可能是( )A. (3,2)B. (-3,2)C. (-3,-2)D. (3,-2) 2. 要使式子-4x 有意义,则x 的取值范围是( )A. x >4B. x ≠4C. x <4D. x ≥4 3. 已知点P 关于x 轴的对称点1P 的坐标是(2,3),则点P 的坐标是( ) A.(-2,-3) B.(-2,3) C. (-3,-2) D.(2,-3)4. 在实数227,0.21,2π,39,,0.1234567中,无理数的个数为( )A . 1 B. 2 C. 3 D. 4 5. 下列说法正确的是( )A. 36的平方根是6B. 16的平方根是±2C. -2是8的立方根D. 4的算术平方根是-2 6. -8的立方根与4的算术平方根的和是( )A. 0B. 4C. -4D. 0或 - 47. 如图,已知在棋盘中建立直角坐标系后,棋子“马”的坐标是 (0,2),则棋子“车”的坐标是( )A.(3, 2)B.(-2,-3)C.(-1,0)D.(-3,2)8. 甲图形经过平移变换得到乙图形,若甲图形上的点P (-2,4)在乙图形上的对应点是Q (3,-2)则乙图形上的点M (6,-8)在甲图形上的对应点N 的坐标是( )A.(1,-2)B.(11,-14)C.(-1,2)D.(5,-6) 9.如图,AB ∥CD ,∠CGF=35 ,∠AHF=60 , 则∠F 的度数为( )A. 25B. 30C. 35D. 60 10.如图,点E 在BC 的延长线上,下列条件中, 能判断AB ∥CD 是的( )A. ∠3=∠4B. ∠1 + ∠ACE = 180C. ∠1=∠2D. ∠D = ∠DCE 二、填空题(3分×6=18分)11.()()的平方根是123--________.12. 在平面直角坐标系中,过(-1,0)作y 轴的平行线L ,若A (-3,2),则点A 关于直线L 对称的点的坐标为 .13. 在平面直角坐标系中,A (2,-1),B (4,3),C (1,2),则△ABC 的面积为14. 如图,A 、B 的坐标分别为A (-1,0),B (0,2),将线段AB 向右平移4个单位长度,则线段AB 在平移过程中扫过的图形的面积为15. 如图,A 、B 的坐标分别为A (-2,0),B (0,1),将线段AB 平移得到线段11A B ,若1A (b ,1),1B (-1,a )则b - a = .16. 如图,CD ∥AB ,BF 平分∠ABE ,DE ∥BF ,若∠D=55 ,则∠ABE= 三、解答题(共7小题,共52分)17. 求下列各式中的x 值 (4分×2 = 8分)18.(本题5分) 的推 理过程填写完整,并在括号中填写推理依据. 解:∵ EF ∥BD∴∠2=∠3( ) ∠1=∠2 ∴∠1=∴ AB ∥ ( ) ∴∠A=∠CDG ( ) ∵∠A+∠C=130 ∴∠C+∠CDG=130 ∵∠BGD=∠C+∠CDG ∴∠BGD=13019.(本题7分)我区某校七年级(1)班周末组织学生第14题图第15题图 第16题图 第9题图第10题图A B PB A PBA P A PB 进行创新素质实践“活动”参观了如图中的一些景点和 设施,为了便于确定方位,带队老师在图中建立了平面 直角坐标系(横轴和纵轴均为小正方形的边所在直线, 每个小正方形边长为1个单位长度)(1)若带队老师建立的平面直角坐标系中,网球场的坐 标为(-3,-2)请你在图中画出这个平面直角坐标系. (2)根据(1)中建立的平面直角坐标系,指出其它景点 和设施的坐标.动物园( );体训基地( );体 育 场( ); 学 校( );音乐广场( );国贸大厦( );百 花 苑( ).20. (本题8分)△ABC 在平面直角坐标系中的位 置如图所示,将△ABC 向右平移6个单位,再向 下平移4个单位得△111A B C(1)请直接写出点A 关于y 轴对称的点的坐标(2)请在图中画出111A B C(3)平移后点C 的对应点1C 的坐标为(4)请直接写出由(2)中△111A B C 的三个顶点 1A 、1B 、1C 为顶点的平行四边形的第四个 顶点1D 的坐标 .21. (本题8分)如图,∠1=∠C ,∠2+∠D=90 ,BE ⊥FD 于G ,试证明:AB ∥CD22.(本题8分)问题:已知线段AB ∥CD ,在AB 、CD 间取一点P (点P 不在直线AC 上),连结PA 、PC ,试探索∠APC 与∠A 、∠C 之间的关系.(1)端点A 、C 同向如图1,点P 在直线AC 右侧时,∠APC -(∠A+∠C )= 度 如图2,点P 在直线AC 左侧时,∠APC +(∠A+∠C )= 度 (2)端点A 、C 反向如图3,点P 在直线AC 右侧时,∠APC 与(∠A - ∠C )有怎样的数量关系? 写出结论并证明;如图4,点P 在直线AC 左侧时,∠APC -(∠A - ∠C )= 度23. (本题8分)如图,已知长方形ABCD 中,边AB=8,BC=4,以点O 为原点,OA 、OC 所在的直线为y 轴和x 轴建立直角坐标系 (1)点A 的坐标为(0,4),写出B 、C 两点的坐标(2)若点P 从C 点出发,以每秒2个单位长度的速度向CO 方向移动(不超过点O ),点Q 从原点O 出发,以每秒1个单位长度的速度向OA 方向移动(不超过点A ),设P 、Q 两点同时出发,在它们移动过程中,四边形OPBQ 的面积是否发生变化?若不变,求其值;若变化,求变化范围.。
宁波起跑线教育Web: 2013年课改版七年级英语期中复习单选60题一、 单选题汇总( )1、The radio says it is __________at night.A. snowB. cloudC. windD. rainy( )2、It ’s always ________in the north of China. And there is too much __________.A. snow; snowB. snowy; snowC. snowy; snowyD. snow; snowy( )3、It ’s __________today. I think it ’s going to _________tomorrow.A. Cloud; rainB. cloudy; rainingC. cloudy; rainD. cloudy; rainy( )4、Thank you very much for __________us so __________.A. teach; goodB. teach; wellC. teaching; goodD. teaching; well( )5、Jim with his mother __________ bikes.A. are ridingB. ridingC. is ridingD. rides( )6、Do you want __________the exciting movie A world without thieves.(天下无贼)A. to seeB. seesC. seeingD. see( )7、 Some girls are playing __________guitar over there.A. /B. theC. aD. an( )8、Jack and Tom often do __________at school.A. His homeworkB. their homeworksC.their homeworkD. our homework( )9、There isn ’t a Dragon Boat Festival in the US, __________it ’s like any other night forZhu Hui and his host family.A. ButB. becauseC. soD. and( )10、One of my classmates __________from France.A. IsB. areC. ame( )11、---Let ’s go to the movie now ! -----Great! The TV show is __________.A. boringB. interestingC. excitingD. not bad( )12、Please __________quiet. The boy is doing homework.A. beB. doC. doesD. you ’re( )13、All the students like to see the __________.A. baby pandaB. bebies pandasC. baby pandasD. pandas baby( )14、Why __________to a movie with me?A. not to goB. don ’t goC. not goD. not going( )15、There are many_________animals in the zoo.A. Kind ofB. kinds ofC. a kind ofD. kinds( )16、Lions like to eat _________, but pandas like to eat _________.A. meat, leavesB. meats, leavesC. meat, leafsD. meats, leaves( )17、This is a symbol _________good luck.A. atB. toC. ofD. from( )18、We call _________ little tiger.宁波起跑线教育Web: A. heB. himC. hisD. she( )19、The elephant is one of Tailand ’s _________.A. symbolB. luckC. symbolsD. lucky( )20、---_________ do you like the pictures? ---Very much.A. WhoB. WhichC. HowD. What( )21、---Thank you very much. ---_________.A. That ’s right.B. You ’re welcome.C. SureD. No.( )22、The koalas are so cute. Let_________see _________first.A. we; themB. us; itC. us ;themD. I; it( )23、You _________to clean the room every day, don ’t you?A. mustB. hadC. haveD.can( )24、There was a party _________the night of June 5th , 1998.A.onB. inC. atD. to( )25、I was late for class _________I didn ’t get up early.A. soB. for D. because D. when( )26、This shirt is too old. Give me a new _________, please.A. itB. themC. oneD. ones( )27、Look at the school rule. It _________“Don ’t be late for school!”A. saysB. sayC. writesD. write( )28、When I _________Shanghai, it was dark.A. arrivedB. gotC. reachedD.arrived at( )29、It ’s raining hard all day, so we _________stay at home.A.mustB. canC.mayD. have to( )30、----_________you follow the rules, please?A. AreB. IsC. DoesD. Can( )31、Did Mary _________at the school late this morning?A. arriveB. getC. reachD. go( )32、---Don ’t eat in the classroom, Lily. ---_________A. Yes, I willB. SorryC. Excuse meD. Why not?( )33、You have to keep quiet in class, but you _________have to do so after class.A. don ’tB. aren ’tC. can ’tD. doesn ’t( )34、---Do your homework first after school, Tom. ---_________.A. You are welcome.B. Yes, I will, mum.C.No, I can ’tD. I don ’t know( )35、My brother and I _________good friends. We never _________with each other.A.am; talkB. are ; fightC. are; talkD. am; fight( )36、I _________my eraser, but I can ’t _________it.A. look for; findB. am finding; look forC. am looking for; findvD.find; look for( )37、Please _________on time next time.A. isn ’tB. aren ’tC. Don ’tD. Don’t be宁波起跑线教育Web: ( )38、It often takes me half an hour _________to school.A.walkingB. to walkC. walkedD. walks( )39、He went home _________some books.A. gotB. gettingC. to getD. get( )40、My mother said to me:“Tom, _________in bed.”A. not readB. doesn ’t readC. don ’t readD. didn ’t read( )41、---Can I smoke here? ---Sorry. Please _______smoke here.A. notB. don ’tC. doD.doesn ’t( )42、I want to know _______.A.where does Bob liveB. where Bob livesC. how does get thereD.how he thinks of the trips( )43、----_______does Linda live from school? ---About 3 kilometres.A. How longB. How soonC. How farD. How many( )44、Some students are playing football, and _______ are running.A.otherB. othersC. anotherD. the other( )45、Please wait for a moment. I have _______to tell you.A. Interesting anythingB. anything interestingC.Interesting somethingD. something interesting( )46、You _______here today.A.don ’t need comingB. needn ’t comingC. don ’t need comeD. don ’t need to come ( )47、There is no bridge _______their school _______the village.A.between; andB. either; orC. both; andD. both; or( )48、_______do you think _______these pictures?A.What; ofB. Where; ofC. Who; aboutD. How; like( )49、My school isn’t far from here. It ’s only _______walk.A. fifteen minutes ’B. fifteen minutes ’sC. fifteen minutesD. fifteen minute ’s ( )50、It took us _______to walk to the park last Sunday.A. one hour and a halfB. one hour and a half hourC. one hours and a half hourD.an hour and a half( )51、---Thanks for your help. ---_______.A.Don’t thank meB. All right.C. Not at allD. You ’re welcome( )52、The workers want to get _______before 10:00.A.thereB. to thereC. to homeD.the factory( )53、Everyone in the class _______the Chinese teacher, Mr Cooper; He is funny.A .look B. looks C. like D. likes( )54、----_______? ---It’s eight thirty.A.How much is itB. How old is itC. What time is itD. How many cats are there.( )55、----Does Tom have a _______? ---Yes. He ________at a school.A.work; jobB. job; worksC. job; workD. work; job( )56、---How do you usually go to school? ---I usually _______a bus to school.宁波起跑线教育Web: A.byB. takeC. goD. ride( )57、Please tell me _______.A.What time do you get upB. what time he gets homeC. when can we come homeD. where is the box( )58、Please _______me about your study.A.speakB. tellC. sayD. hear ( )59、He usually goes _______at six in the morning.A.his homeB. homeC. schoolD. work。
2013年上学期七年级下册数学期中考试题(含答案)2012~2013学年度第二学期期中测试七年级数学注意事项考生在答题前请认真阅读本注意事项:1.本试卷共4页,满分为100分,考试时间为100分钟.考试结束后,请将答题纸交回.2.答题前,请务必将自己的姓名、考号及所在学校、班级等填写在答题纸指定位置.3.答案必须按要求写在答题纸上,在草稿纸、试卷上答题一律无效.一、选择题(本大题共10小题,每小题2分,共20分)1.如图所示,∠1和∠2是对顶角的是()2.计算的结果是()A.2B.±2C.-2D.43.实数-2,0.3,,,-π中,无理数的个数有()A.1个B.2个C.3个D.4个4.我们常用如图所示的方法过直线外一点画已知直线的平行线,其依据是()A.同位角相等,两直线平行B.内错角相等,两直线平行C.同旁内角互补,两直线平行D.两直线平行,同位角相等5.估计的值()A.在3到4之间B.在4到5之间C.在5到6之间D.在6到7之间6.方程组的解为,则被遮盖的两个数分别为()A.5,2B.1,3C.2,3D.4,27.把点(2,一3)先向右平移3个单位长度,再向下平移2个单位长度得到的点的坐标是()A.(5,-1)B.(-1,-5)C.(5,-5)D.(-1,-1)8.若点P是第二象限内的点,且点P到x轴的距离是4,到y轴的距离是3,则点P的坐标是()A.(-4,3)B.(4,-3)C.(-3,4)D.(3,-4)9.甲、乙两种商品原来的单价和为100元,因市场变化,甲商品降价10%,乙商品提价40%,调价后两种商品的单价和比原来的单价和提高了20%.若设甲、乙两种商品原来的单价分别为x元、y元,则下列方程组正确的是()A.B.C.D.10.如图,数轴上表示1、的对应点分别为点A、点B.若点A是BC 的中点,则点C所表示的数为()A.B.C.D.二、填空题(本大题共8小题,每小题3分,共24分)11.如果用(7,1)表示七年级一班,那么八年级五班可表示成▲.12.计算:=▲.13.把命题“等角的补角相等”写成“如果……,那么……”形式为:▲.14.已知是方程的解,则的值为▲.15.一个正数的两个平方根分别为a+3和2a+3,则a=▲.16.已知2a+3b+4=0,则▲.17.已知点A(4,3),AB∥y轴,且AB=3,则B点的坐标为▲. 18.三个同学对问题“若方程组的解是,求方程组的解.”提出各自的想法.甲说:“这个题目好象条件不够,不能求解”;乙说:“它们的系数有一定的规律,可以试试”;丙说:“能不能把第二个方程组的两个方程的两边都除以5,通过换元替换的方法来解决”.参考他们的讨论,你认为这个题目的解应该是▲.三、解答题(本大题共8小题,共56分)19.(本题满分8分)(1)解方程:(2)解方程组:20.(本题满分6分)如图,AB∥CD,BE平分∠ABC,∠DCB=140°,求∠ABD和∠EDC的度数.21.(本题满分6分)在y=中,当时,y=;时,y=;时,y=,求的值.22.(本题满分6分)如图,直线AB是某天然气公司的主输气管道,点C、D是在AB异侧的两个小区,现在主输气管道上寻找支管道连接点,铺设管道向两个小区输气.有以下两个方案:方案一:只取一个连接点P,使得向两个小区铺设的支管道总长度最短;方案二:取两个连接点M和N,使得点M到C小区铺设的支管道最短,使得点N到D小区铺设的管道最短.(1)在图中标出点P、M、N的位置,保留画图痕迹;(2)设方案一中铺设的支管道总长度为L1,方案二中铺设的支管道总长度为L2,则L1与L2的大小关系为:L1▲L2(填“>”、“<”或“=”).23.(本题满分6分)已知:如图AB⊥BC,BC⊥CD且∠1=∠2,试说明:BE∥CF.解:∵AB⊥BC,BC⊥CD(已知)∴▲=▲=90°(▲)∵∠1=∠2(已知)∴▲=▲(等式性质)∴BE∥CF(▲)24.(本题满分8分)与在平面直角坐标系中的位置如图.⑴分别写出下列各点的坐标:▲;▲;▲;⑵说明由经过怎样的平移得到?▲.⑶若点(,)是内部一点,则平移后内的对应点的坐标为▲;⑷求的面积.25.(本题满分7分)如图,DE⊥AC于点E,BF⊥AC于点F,∠1+∠2=180°,试判断∠AGF与∠ABC的大小关系,并说明理由.26.(本题满分9分)某商场第1次用39万元购进A、B两种商品,销售完后获得利润6万元,它们的进价和售价如下表:(总利润=单件利润×销售量)(1)该商场第1次购进A、B两种商品各多少件?(2)商场第2次以原价购进A、B两种商品,购进B商品的件数不变,而购进A商品的件数是第1次的2倍,A商品按原价销售,而B商品打折销售,若两种商品销售完毕,要使得第2次经营活动获得利润等于72000元,则B种商品是打几折销售的?2012~2013学年度第二学期期中测试试题七年级数学参考答案一、选择题题号12345678910答案CABACDCCBD二、填空题11、(8,5)12、13、如果两个角相等,那么这两个角的补角相等.或(如果两个角是相等的两个角的补角,那么这两个角相等.)14、315、-216、1317、(4,6)或(4,0)18、三、解答题19、(1)解:x-1=±2…………………………………………………………(2分)∴x=3或-1…………………………………………………………(4分)(2)解:①+②得:x=-1………………………………………(2分)把x=-1代入①得:y=2………………………………………(3分)∴原方程组的解为………………………………………(4分)(用代入法解参照给分)20、解:∵AB∥CD∴∠C+∠ABC=180°…………………………………………………(2分)∵∠C=140°∴∠ABC=40°……………………………………………(3分)又∵BE平分∠ABC∴∠ABD=∠ECB=20°………………………………………………(4分)又∵AB∥CD∴∠BDC=∠ABD=20°……………………………………………(5分)∴∠EDC=180°-∠BDC=160°………………………………………(6分)21、解:由题意得:…………………………(3分)把c=0代入②、③得:……………………………(4分)解得:a=1,b=-3.………………………………(5分)∴a=1,b=-3,c=-7.…………………………(6分)22、解:(1)图略.画垂线段各2分,少直角标志扣1分,连接CD1分………(5分)(2)L1>L2………………………………(6分)23、解:∵AB⊥BC,BC⊥CD(已知)………………………………(每空1分,共6分)∴∠ABC=∠DCB=90°(垂直的定义)∵∠1=∠2(已知)∴∠EBC=∠FCB(等式性质)∴BE∥CF(内错角相等,两直线平行)24、解:(1)(-3,1);(-2,-2);(-1,-1);………(3分)(2)先向左平移4个单位,再向下平移2个单位或先向下平移2个单位,再向左平移4个单位………(4分)(3)(a-4,b-2)……………………………………………(5分)(4)将补成长方形,减去3个直角三角形的面积得:6-1.5-0.5-2=2………………………………………(8分)(补成其他图形均可,酌情给分)25、解:∠AGF=∠ABC.………………………………………(1分)理由如下:∵DE⊥AC,BF⊥AC∴∠AFB=∠AED=90°………………………………………(2分)∴BF∥DE………………………………………(3分)∴∠2+∠3=180°………………………………………(4分)又∵∠1+∠2=180°∴∠1=∠3………………………………………(5分)∴GF∥BC………………………………………(6分)∴∠AGF=∠ABC.………………………………………(7分)26、解:(1)设第1次购进A商品x件,B商品y件.由题意得:(2)设B商品打m折出售.由题意得:……………(8分)解得:m=9……………………………(9分) 答:B商品打9折销售的.。
七年级政治测试试卷一、请你选择(每题只有一个选项最符合题意,请将所选项字母填在下面表格相应的位置。
每小题3分,共60分)1、著名指挥家卡拉扬说交响乐团要有“团队音”,各自的乐音要顾及整体,不能成为干扰别人的音。
这表明在集体中A.不应突出自己B.该团结协作、相互配合C.不能有自己的见解D.只能有一个想法,大家必须完全一致2、法国作家罗曼·罗兰曾说:“要散布阳光到别人心里,先得自己心里有阳光。
”下面对这句格言的理解,不正确的是A.应学会主动关心、帮助朋友B.真诚和热情能使自己获得更多的友情C.主动的交往是建立良好人际关系的前提D.与同学交往太主动,是一种不正常的心理3、学习有苦也有乐。
对于学习中的苦与乐,我们应采取的正确态度是A.“学海无涯苦作舟”,学习就是痛苦的B.要学会忍受学习中的痛苦,放弃快乐C.要弃苦求乐,充分享受学习中的欢乐D.体会学习的乐,以苦为乐,享受学习4、七年级是人生道路上的一个新的起点。
在与新同学相处时,我们应做到A.彼此交流,共同成长B.相互设防,封闭自我C.斤斤计较,寸步不让D.事不关己,高高挂起5、俗话说:“一个篱笆三个桩,一个好汉三个帮。
”这主要告诉我们,创建一个优秀的班集体,需要A.制定共同的奋斗目标B.同学们之间团结协作C.展示个人的智慧热情D.班主任老师精心管理6、中学生必须学会自主学习,才能适应新的学习生活。
下列做法符合自主学习要求的是A.不和同学商量学习中的问题B.让家长检查自己的作业是否有错误C.独立主动安排学习,不依赖老师和家长D.以自学为主,拒绝老师的帮助7、右边的“艾宾浩斯遗忘曲线图”主要告诉我们,要提高学习效率,应做到A.考前临时突击B.课前认真预习C.上课专心听讲D.课后及时复习8、中学阶段学习科目多,任课老师也多,每位老师都有自己的教学方式和教学特色,但你却对某位老师的上课方式不感兴趣。
对此,你的正确做法是A.勉强凑合,学多少是多少B.找准机会与老师唱对台戏C.主动找老师探讨解决办法D.走自己的路,让老师讲去吧9、“君子曰:学不可以已。
2013年版人教新目标七年级英语下册期中复习试题一.单项选择( )1.—Does Linda like playing________piano?--Yes.And she also likes to play_______ chess.A./;theB.the;/C.the; theD.a; a( )2.—What_____sports do you like?--I like tennis and baseball, too.A.otherB.allC.anyD.every( )3.Please______ talking. Let’s do our homework.A.loveB.needC.stopD.know( )4.English is very_____to us.We must learn it well.A.importantB.difficultC.boringD.interesting ( )5.—Don’t run in the hallways.--___________A.No, thanksB.I knowC.Sorry, Ms Wange on ( )6.—Who is the woman______ Lily and Lucy?--She is my aunt.A.overB.betweenC.underD.about( )7.3.When the girl sees her mother, she ________very happy.A. feelsB. soundsC. tastesD. listens( )8.--_________ does Nick usually go to work?--He usually goes to work_______subway.A. How; byB. What; withC. How; inD. What; by( )9.________ in the classroom.A. Not eatB. Don't eatC. Isn' t eatD. Can' t eat( )10.--Sam, do you need ________rice?--No. I need __________bread.A. any; anyB. lot; someC. some; someD. some; any( )11. --What' s your favorite ________?--Pandas. They are very cute.A. clothesB. peopleC. monthD. animals( )12--Ann, are you busy now?--Yes. I __ my brother with his math now.A. am helpingB. helpC. are helpingD. helps( )13.--Can your sister _______ it in Chinese?--No. She can' t ________ Chinese.A. speak; tellB. talk; sayC. say; speakD. tell; talk( )14. --What do you think of this skirt?--____________.A. Here you areB. It' s greenC. No, it isn' tD. I like it very much ( )15. --I'11 have a history test next Monday.--_________ .A. Have funB. Good luckC. Come onD. Excuse me二.完形填空Every Saturday morning, Alice goes to see her grandparents. They 1 in the south of the city. It usually 2 her about 20 minutes to get there by by us.It's Saturday today. Alice gets up 3 in the morning. She wants to take some eggs and vegetables to her 4 . At 8:00, she comes to the 5 stop to take the number 4 bus. At about 8:30, Alice gets to her grandparents house. They are very 6_ to see Alice.At about 9:30, Alice and her grandparents go out to 7 in the supermarket. They buy some riceand fruit there. Her grandma is good 8 cooking (做饭). She cooks some food for Alice. The food is very 9 , so Alice likes to eat it.After lunch, Alice 10 her grandma do the dishes. And then Alice and her grandparents watch TV in the living room, Alice feels very happy to be with her grandparents.( ) 1. A. meet B. live C. leave D. miss( ) 2. A. asks B. brings C. takes D. saves( ) 3. A. early B. really C. just D. still( ) 4. A. teachers B. friends C. classmates D. grandparents ( )5. A. train B.'bus . C. TV D. radio( )6. A. afraid B. strict C. happy D. shy( )7. A. shop B. dance C. drink D. sleep( )8. A. for B. at C. with D. of( )9. A. terrible B. dirty C. useful D. delicious( )10. A. wants B. makes C. helps D. lets三.阅读理解AWelcome to the zooDo you like clever monkeys? Do you like cute pandas from Sichuan? Do you want to see strong tigers? Do you want to see big elephants? In our zoo, we have many monkeys, three pandas, four tigers, five elephants and some other animals. Here, you can see the Monkey Show, the Elephant Show and the Panda Show. You can have fun in our zoo!Time:10:00 am~4:00 pm [Monday - Friday]9:00 am ~5:00 pm [Saturday and Sunday ]Tickets:Adults (成人): 30 yuanStudents (13-18): 15 yuanKids (8~12): 10 yuanKids (1~7): freePlease call 668-7042 to buy tickets.根据材料内容,选择最佳答案。
2013年秋七年级英语期中测试题(总分150分,时间120分钟)听力部分(共15分)(每小题1分,共5分)()1、A、photo B、brother C、hello()2、A、in the schoolbag B、on the desk C、under the desk()3、A、play football B、play volleyball C、play tennis()4、A、I want to eat apples.B、I need a photo of your familyC、I like a red watch.()5、A、66984127 B、66894127 C、66981472(每小题1分,共5分)()6、A、My name is Jim GreenB、His name is Jake BrownC、Her name is Cissy White()7、A、Yes, it isB、No, it isn’t his schoolbag.C、Yes,it’s her schoolbag.()8、A、It’s on the desk B、No, it isn’t C、It is yellow()9、A、No B、That sounds good C、Sorry.()10、A、It’s good B、It’s white and green C、It’s very small(每小题1分,共5分)()11、What’s Henry’s family name?A、GreenB、KateC、smith()12、Who is Jack Green?A、Henry’s grandfatherB、Henry’s brotherC、Henry’s sister ()13、How old is Kate?A、ElevenB、TwelveC、Thirteen()14、What does Henry have?A、A volleyballB、A soccer ballC、A tennis racket()15、Where is Henry’s mother?A、She isn’t in the photoB、She is under the treeC、She is at the table笔试部分(135分)一、单项选择题(20分)( )16. Jenny is _______ English girl and Ling Ling is _______Chinese boy.A. a, anB. an aC. an an( )17. What’s this ? It’s ___________fA. aB. anC. 不填( )18. Does John play baseball?A. aB. anC. 不填( ) 19. Come on,We are late school.A. forB.toC. of( ) 20. How _____ he? He is fine.A. areB. isC. am( ) 21. Please call ______ at 7227535.A. IB. meC. my( ) 22. What’s this ? ________ a map.A. It’sB. This isC. That’s( ) 23. His name is Jim Green. His first name is _________.A. JimB. GreenC. Jim Green( ) 24. Tim Hand ______ my name.A. amB. isC. are( ) 25. What’s _______ name?A. heB. hisC. him( ) 26. What’s this _______ English?A. atB. inC. for( ) 27. _____ are his brothersA. ItB. ThatC. These( ) 28. Is this your sister?_______ , This is my friend.A. No, it is.B. No, it isn’tC. Yes, it isn’t. ( ) 29. Thanks ______ your pens.A. atB. inC. for( ) 30. Where are the books? ______ on the sofa.A. It’sB. These areC. They’re( ) 31. Do you have two balls? Yes, ______.A. I amB. I doC. I don’t( ) 32. _____ he have a soccer ball?A. DoB. DoesC. Is( ) 33. I ______ have cousinsA. am notB. doesn’tC. don’t( ) 34. Please _____ these books to Jim. He’s in that room.A. bringB. takeC. have( ) 35. Your pen is good, _______.A. It isn’tB. yes, it isC. Thank you.二、完形填空:(10分) My 41 is Li Ming. I 42 eleven. Xiao Hua is my friend. 43 is thirteen. We 44 in the same(同一) school. My 45 is a teacher. She is a teacher in 46 school. My dad is a teacher, 47 .He is an 48 teacher in a college(大学). I have a cat. 49 name is Mimi.It is white and black. It′s a nice cat.We are good 50 . ( )36. A.sister B.friend ( )37. A.is B.are C.am( )38. A.I B.He C.her( )39. A.is B.are C.am( )40. A.dad B.mother C.teacher( )41. A.my B.his C.hers( )42. A.to B.too C.but( )43. A.tall B.strong C.English( )44. A.It’s B.Its C.Hers( )45. A.friend B.friends C.friend’s三、阅读理解:(40分)AHello! My name’s Mary Brown. I’m a girl. I like(喜欢)red. I have(有) a red backpack. What’s this? It’s my red pencil case. Is that my ruler? Yes, it is. It is a red ruler.What’s that? It is a watch. Is it my watch? No, it isn’t. It’s Bob’s watch. It’s blue.根据短文内容选择最佳答案。
2013~2014学年度第一学期期中教学质量检测七年级数学试题(考试时间:100分钟 总分:100分 制卷人:马君琴 审核人 :张霞)一.选择题(本题共10小题,每小题2分,共20分.下列各题只有一个结论是正确的, 请把正确结论的代号填入答题纸中的对应表格内)1.–5的绝对值是【 ▲ 】A .5B .–5C .51D .51- 2.把数轴上表示数2的点移动3个单位后,表示的数为【 ▲ 】A .5B .1C .5或1D .5或-13.把()()532--+--写成省略加号的和的形式,正确的是【 ▲ 】A .532++-B .532+--C .532---D .532-+-4.在式子xx y x a y x 1,31,3,,0,2+--+ 中,单项式的个数为 【 ▲ 】 A .5 B. 4 C. 3 D. 25.据媒体报道,我国因环境污染造成的巨大经济损失,每年高达680000000元,这个数用科学记数法表示正确的是【 ▲ 】A.68109.⨯元B.68108.⨯元C.68107.⨯元 D.68106.⨯元 6.多项式21xy xy -+次数及最高次项的系数分别为【 ▲ 】A .2,1 B. 2,-1 C. 3,-1 D. 5,-17.一个多项式与2x -2x +1的和是3x -2,则这个多项式为【 ▲ 】A. -2x +5x -3B.-2x +x -1C. 2x -5x +3D.2x -5x -138.下列运算正确的是【 ▲ 】A .-2(-a +b )=2a -bB .-2(-a +b )=2a +bC .-2(-a +b )=2a +2bD .-2(-a +b )=2a -2b9.如图,a 、b 两个数在数轴上的位置如图所示,则下列各式正确的是【 ▲ 】A .0<+b aB .0<abC .0<-a bD .0>ba 10.下列说法正确的是【 ▲ 】A .有理数都有倒数B .-a 一定是负数C .两个负数,绝对值大的反而小D .两个有理数的和一定大于加数二.填空题(本题共8小题,每小题2分,共16分.直接把最后的结果填在答题纸的横线上,不需写出解答过程)11.如果水库的水位高于正常水位2m 时,记作+2m ,那么低于正常水位3m 时,应记作 ▲ .12.单项式y x 24-的系数为 ▲ .13.某种零件,标明要求是φ:20±0.02 mm (φ表示直径,单位:毫米),经检查,一个零件的直径是19.9 mm ,该零件 ▲ .(填“合格” 或“不合格”)14.若2x 3y m 与-3x n y 2是同类项,则m +n = ▲ .15.若23(2)0m n -++=,则2m n +的值为 ▲ .16.某轮船顺水航行3小时,逆水航行1.5小时,已知轮船在静水中的速度是a 千米/时,水流速度是y 千米/时,轮船共航行▲ 千米.17.已知232=+x x ,则多项式2394x x +-的值是 ▲ .18.“数学王子”高斯从小就善于观察和思考.在他读小学时就能在课堂上快速地计算出1+2+3+…+98+99+100=5050,今天我们可以将高斯的做法归纳如下:令 S =1+2+3+…+98+99+100 ①S =100+99+98+…+3+2+1 ②①+②:有2S =(1+100)×100 解得:S =5050请类比以上做法,计算:-1-2-3-…-(n -2)-(n -1)-n = ▲ .三.解答题(本题共8小题,共64分.解答时应写出文字说明、证明过程或演算步骤,同时请把答案写在答题纸上对应的区域内)19.(本题满分6分)在数轴上把下列各数表示出来,并用“<”连接各数.2, 1--,211,0,()5.3-- ▲ ▲ ▲ ▲ ▲ ▲ ▲20.(本题共2小题,每小题5分,共10分.)计算:(1)(12765321-+-)÷(361-) (2)3)3(]2)4[()3(2322÷--+-⨯-+-▲ ▲ ▲ ▲ ▲ ▲ ▲21.(本题共2小题,每小题5分,共10分.)化简:(1)2222735xy y x xy y x --+ (2)()()222323x x x x x +-+--▲ ▲ ▲ ▲ ▲ ▲ ▲22.(本题满分8分)先化简,再求值:⎪⎭⎫ ⎝⎛+-+⎪⎭⎫ ⎝⎛--y x y x x 312331221,其中2,1=-=y x ▲ ▲ ▲ ▲ ▲ ▲ ▲23.(本题满分4分).有理数a , b , c 在数轴上的位置如图所示,试化简下式:c a b a -+-+-▲ ▲ ▲ ▲ ▲ ▲ ▲24.(本题满分8分)某冷冻厂的一个冷库的室温是-5℃,经过5小时室温降到-25℃.(1)这个冷库的室温平均每小时降低多少℃?(2)若把该冷库的室温再降到-50℃,则还需经过多长时间?▲ ▲ ▲ ▲ ▲ ▲ ▲25.(本题满分8分)某巡警骑摩托车在一条南北大道上巡逻,某天他从岗亭出发,晚上停留在A处,规定向北方向为正,当天行驶情况记录如下(单位:千米):+10,-8,+7,-15,+6,-16,+4,-2(1)A处在岗亭何方?距离岗亭多远?(2)若摩托车每行驶1千米耗油a升,这一天共耗油多少升?▲ ▲ ▲ ▲ ▲ ▲ ▲26.(本题满分10分)某商场销售一种西装和领带,西装每套定价1000元,领带每条定价200元.“国庆节”期间商场决定开展促销活动,活动期间向客户提供两种优惠方案.方案一:买一套西装送一条领带;方案二:西装和领带都按定价的90%付款.现某客户要到该商场购买西装20套,领带x条(x>20).(1)若该客户按方案一和方案二购买,各需付款多少元?(用含x的代数式表示)(2)若x=30,通过计算说明此时按哪种方案购买较为合算?(3)当x=30时,你能给出一种更为省钱的购买方案吗?试写出你的购买方法.▲ ▲ ▲ ▲ ▲ ▲ ▲.2013~2014学年度第一学期期中教学质量检测七年级数学参考答案一.选择题二.填空题11. -3m 12. -4 13. 不合格 14. 515. -1 16. 4.5a +1.5y 17. 2 18.n n ⨯--)121( 三.解答题19.略20.(1)81 (2)-4921.(1)2262xy y x - (2)x x +2622.化简结果:y x +-3求值结果:523. c b -24. (1)4℃ (2)425小时 25.(1)A 处在岗亭南边距离岗亭14千米。
七年级数学第二学期期中试题
一、选择题
1. 代数式:2
13,0,52,17,52
--+-x x x
abc 中,单项式共有( )个.A .1个B .2个C .3个 D .4个
2、崂山的最高峰巨峰的海拔高度为1132.7米,它的百万分之一相当于( )
A 、一张乘车卡的厚度
B 、一本数学书的厚度
C 、一本数学书的宽度
D 、一张数学试卷的宽度 3、 在下列四组条件中,能得出AB CD ∥的是 ( ) A.∠1=∠2 B.∠BAD=∠BCD
C.∠ABC=∠ADC ,∠3=∠4 D.∠BAD+∠ABC=180° 4.下列计算正确的有( )
①10-2
=-20 ②(-1)0 =
1 ③a 2
·a
5 = a 10
④(3ab 2) 2 =
3a 2b
4
⑤x 3+x 3=x
6
⑥ b 6÷b 4=b
2
A 、5个
B 、4个
C 、3个
D 、2个
5、如右图,已知B 、C 、E 在同一直线上,且CD//AB,若∠A=80°,∠B=40°,则∠ACE 为( ) A.100° B. 40° C. 120° D. 80°
二、填空题
6.如图,一条街道的两个拐角∠ABC 与∠BCD ,若∠ABC=1300
,且街道AB 与 CD 保持平行,则∠BCD= °
7. 一种细胞的直径约为0.00000106米,可以用科学记数法表示为 米,其中有效数字是。
8. 若2=m
a
,3=n a
,则2m n a -的值是 。
9、将一副三角板摆放成如图所示,图中1∠= 度。
10.
小明在利用完全平方公式计算一个二项整式的平方时,不小心用墨水把最后一项染黑了,得到正确的结果变为
2424a ab -+,你觉得这一项应是 。
三、尺规作图,不写作法,但保留作图痕迹(本题满分6分) 11、如图,根据要求作图,并回答问题: (1).在AD 的右侧作∠DCP=∠DAB;
(2).在射线CP 上取一点E ,使CE=AB ,连接BE
(3).以点A.B. E .C 为顶点的图形是一个怎样的图形?
四、解答题 12. 计算 (1)()()
3
22
333
2a a a a -+-+⋅ (2)()()()212113+---+-a a a
(3)、[(2m+n)2
-n(n+4m)-8m]÷(-2
1m) (4).用简便方法计算:2
981- B A
D
C
.
·
13、已知:如图,AB ∥CD ,∠A = ∠D ,试说明 AC ∥DE 成立的理由。
下面是晓华同学进行的推理,请你将晓华同学的推理过程补充完整。
解:∵ AB ∥ CD (已知)
∴ ∠A = (两直线平行,内错角相等) 又∵ ∠A = ∠D ( 已知 ) ∴ ∠ = ∠ (等量代换)
∴ AC ∥ DE (____________________________ )
14.化简求值(4a -3b )(2a -b )-2(3b -2a )2
其中a= -1,b=0.5
15、如图、∠1=∠2 ,能判断AB//CD 吗? 若不能判断AB//CD ,你认为还需要再添加的一个条件是什么? 写出这个条
件,并说明你的理由
B 卷
一、选择题
1.计算=-+-20032002)2()2(( ) 4005
2-A B 2- C 2002
2- D 2002
2
2.如图,AB ∥DE ,那么∠BCD 于 ( )
A .∠2-∠1
B .∠1+∠2
C .180°+∠1-∠2
D .180°+∠2-2∠1 二、填空题
3.已知:如图OC ⊥AB 于O ,∠DOE=
90则∠AOE 的补角为 。
4、邓老师设计了一个计算程序,输入和输出的数据如下表:
那么,当输入数据为n 时,输出的数据是 ;
5、如图,一块半圆形钢板,从中挖去直径分别为
x 、y 的两个半圆: (1)求剩下钢板的面积;
(2)若4=x 、2=y ,剩下钢板的 面积是多少?(π取3.14) x
y
A C
D
F
B E
1
2
6.
如图①边长为a 的大正方形中有一个边长为b 的小正方形,若将图①中阴影部分拼成如图②的图形 (1)试求两图中阴影部分的面积 (2)它验证了哪个乘法公式?试写出 (3)请你用另外的方法再来验证这个公式
7、探究题 如图,直线AC ∥BD ,点P 是一个动点,连接PA 、PB ,构成∠PAC 、∠APB 、∠PBD 三个角。
(1)当动点P 落在AC 、BD 内部如图①的位置时,则∠PAC 、∠APB 、∠PBD 三个角存在等量关系:_______________________。
(直接写出结论,不用说理,提示:可以过点P 作AC 的平行线)
图① 图② 图③
(2)当动点P 落在AC 的上方如图②的位置时,∠PAC 、∠APB 、∠PBD 三个角存在等量关系:_______________________。
请说明理由
(3)当动点P 落在BD 的下方如图③的位置时,∠PAC 、∠APB 、∠PBD 三个角存在等量关系:_______________________(直接写出结论,不用说理)。
第三章
一、选择题:
1、任何一个三角形的三个内角中至少有( )
A 、一个角大于60°
B 、两个锐角
C 、一个钝角
D 、一个直角
2、如果一个三角形的三条高所在直线的交点在三角形外部,那么这个三角形是( ) A 锐角三角形 B 直角三角形 C 钝角三角形 D 等边三角形
3、下列4组线段能组成三角形的是( )
A 、3, 3, 6
B 、3.1, 3, 6
C 、1, 2, 1
D 、3, 2, 1
4、在下列长度的四根木棒中,能与4cm 、9cm 长的两根木棒钉成一个三角形的是( ). (A )4cm (B )5cm (C )9cm (D )13cm
5、在下图中,正确画出AC 边上高的是( ).
(A ) (B) (C) (D) 6、已知ΔABC 的三个内角∠A 、∠B 、∠C 满足关系式∠B+∠C=3∠A ,则此三角形( )
A 、一定有一个内角为45︒
B .一定有一个内角为60︒
C .一定是直角三角形
D .一定是钝角三角形 P
D
B C
A
P
D
B
C
A A
C
B
D P
b b a a b
b b b
a a
7.在下列条件中:①∠A +∠B=∠C ,②∠A ∶∠B ∶∠C=1∶2∶3,③∠A=900
-∠B ,
④∠A=
21∠B=3
1
∠C 中,能确定△ABC 是直角三角形的条件有( ) A 、1个 B 、2个 C 、3个 D 、4个
二、填空题
1.在直角三角形中,有一个锐角是另一个锐角的2倍,则这个锐角的度数是 。
2、已知△AB C 为等腰三角形,
①当它的两个边长分别为8 cm 和3 cm 时,它的周长为 ; ②如果它的周长为18 cm ,一边的长为4 cm ,则腰长为 。
3、在△ABC 中,∠A +∠B=110º,∠C =2∠A ,则∠A= ,∠B= 。
4、若△ABC 的面积为16㎝2,AB 边上的高是5㎝,则AB 的长是 。
5、一个三角形的两边长分别为3和6,第三边长为奇数,则第三边长是 。
6.在△ABC 中,AB =6 cm ,AC =8 cm 那么BC 长的取值范围是___________.
7、如图,△ABC 中,∠B=55O ,∠C=63O
,DE ∥BA ,则∠DEC= 。
8、如图8,∠A=360,∠C=720
,BD 平分∠ABC ,则∠ABD 的度数是 。
9、如图12,Rt △ABC 中,AD 是BC 边上的高,若∠C=360
,则∠B= , ∠DAB= 。
10、AD 是⊿ABC 的中线。
⊿ABD 的周长比⊿ADC 的周长大4,则AB 与AC 的差为_________。
11、 直角三角形两个锐角的平分线所构成的钝角等于_____ 度。
12.如图;△ABC ≌△BAD ,那么∠
=∠DAB ,=
BD
13、.如图为两个全等的三角形,则∠C 的对应角为_____.
14.如图,AD ⊥BC ,AB ⊥AC,在△AEC 中,EC 边上的高为 ,在△ABC 中,
AC 边上的高为
三、作图
1、如图所示,作出△ABC 的三条高。
2、把正方形网格分割成两 个全等图形,沿网格线画出 四种不同的分法:
C
图
8A。