1、学校 班级_ 姓名_ 号数_线南安柳城片区2008年秋期中考初二年数学科试卷(满分150分,考试时间120分钟)题号一二三四总分五最后得分167181922232425262728附加题得分一、 选择题(有且只有一个答案正确)(每小题4分,共24分)1、下列各计算中,正确的是( )。A 、b2 b =b3; B、b2 +b2=b4 ; C、(b2 )3=b5 ; D、(6ab)2 =12a2b2 。2. 一组数 这几个数中,无理数的个数是( ) A. 2 B. 3 C. 4 D. 53、下列从左到右的变形中,属于因式分解的是( )A.( x+1)( x-1)= x2-1 B. x2-2x+1=
2、 x(x-2)+1 C. a2-b2=(a+b)(a-b) D. mx+my+nx+ny=(x+y)m+n(x+y)4、10的平方根应表示为( ) A、 B、 C、 D、5、若以下各组数值作为三角形各边的长,则能组成直角三角形的是( )A12,5,13; B.2, 3, 5; C.6, 12, 14 D.15, 20, 24。C6、如图,一圆柱高8cm,底面半径2cm,一只蚂蚁从点B出发沿着圆柱的侧面爬行到点A处吃食,要爬行的最短路程(取3)是( ) A.20cm; B.13cm; C.14cm; D.10 cm. (第6题)二. 填空题(每小题3分,共36分)7、4的算术平方根是 。8、式子
3、4x2yz+6x3y的公因式是: _。9、计算: 2 x2 (x+4)=_ 。10、若一个正数的两个平方根为2m-6与3m+1,则这个数是 。11、已知,如图中字母B代表的正方形的面积为_。 (第11题) (第12题)12、如图,有两棵树,一棵高6米,另一棵高3米,两树相距4米一只小鸟从一棵树的树梢飞到另一棵树的树梢,至少飞了 _ 米.13、在数轴上,与表示的点相距2的点表示的数为 。14、计算: 。15、请你观察、思考下列计算过程:因为,所以,同样,因为,所以由此猜想=_16、若代数式 的值为6 ,则代数式的值为 。17、写一个二项式,使它可以先提公因式,再运用公式来分解,你写的二项式是_
4、。18、有一个长为50 cm,宽为30 cm,高为40 cm的木箱(如右图),一根长70 cm的木棒 _(填上“能”或“不能”)放进去。 (第18题)三、计算题(每小题8分,共32分)19、(本题8分)计算: 20、(本题8分)计算: (5a3b)(-4abc) (-5ab)21、(本题8分)计算:(6m5n4 m4n3 m3n3) m3n3;22、(本题8分)因式分解: 四、解答题:(共58分)23、(本题8分)化简求值: 其中x=2,y= -3。24、(本题8分)已知a+b=7,ab=12,求代数式a2+b2的值。25、(本题8分)如图,一架长2.5 m的梯子,斜靠在一竖直的墙上,这时,梯
5、底距墙底端0.7 m,如果梯子的顶端沿墙下滑0.4 m,则梯子的底端将滑出多少米?26、(本题8分)公园里两片草地的尺寸及面积分别如图所示,由题意试列出方程组并且求出和的值.27、(本题13分)如图,在RtABC中,C=90,BC=10cm,AC=24cm,在顶点A处有一只蚂蚁P,以4厘米/秒的速度沿AC方向爬行,同时在顶点B处有一只蜗牛Q,以1厘米/秒的速度沿BC方向爬行。(1)求AB边的长; (2)当它们出发爬行3秒后,相距多少厘米?(结果保留根号)(3)当它们出发爬行t秒后(0t6),四边形APQB的面积是多少?(结果用含t的代数式表示) APCQB28、(本题13分)观察下面各式: (
6、x-1)(x+1)=x2-1;(x-1)(x2+x+1)=x3-1;(x-1)(x3+x2+x+1)=x4-1;(1)根据上面各式的规律,得:(x-1)(xn-1+xn-2+xn-3+x+1)=_ (其中n为正整数); (2)根据这一规律,计算1+2+22+23+24+262+263的值 (3)如果将以上第一个等式反过来写得x2-1=(x+1)(x-1)请利用这个式子的原理用简便方法计算:1002- 992+982- 972+22-1五、附加题(共10分)友情提示:请同学们做完上面考题后,再认真检查一遍,估计一下你的得分情况如果你全卷得分低于90分(及格线),则本题的得分将计入全卷总分,但计入
7、后全卷总分最多不超过90分;如果你全卷得分已经达到或超过90分,则本题的得分不计入全卷总分(1)(5分)计算:2 (2)(5分)在RtABC中,C=90,BC=3cm,AC=4cm,AB= cm。柳城片区2008年秋期中考初二数学科答案及评分标准一、选择题:1、A 2、B 3、C 4、B 5、C 6、D二、填空题:7、2; 8、2x y; 9、2x3+8x ; 10、16 ; 11、144; 12、5; 13、 ;14、1; 15、111111111; 16、20; 17、2x -2(答案不唯一); 18、能。三、计算题:19、解:原式=24-(2+3)-4分 =8-5 -6分 =3 -8分2
8、0、解:原式=5(-4)(-5)(a3aa)(bbb)c -4分 =100 a5b3c -8分21、解:原式=6m5n4 m3n3 m4n3 m3n3 + m3n3 m3n3 -4分 =10 m3n +1 -8分22、解:原式=a(a2+4a+4) -4分 =a(a+2)2 -8分四、解答题:(共58分)23、解: = x +y2 +2xy(x y2)2 y2 -4分 = x +y2 +2xyx + y22 y2 =2xy -6分 当x=2,y=3时原式=22(-3) -7分 =-12 -8分24、解:当a+b=7,ab=12时 a2+b2=(a+b)2 - 2ab -4分 =72- 212
9、-6分 =49- 24 =25 -8分25、解:在RtAOB中 AB= 学校:_ 班级:_ 姓名:_ 考号:_座位号_密封线内不要答题2015学年第一学期期中考试试题七年级英语(试题总分135分 考试时间120分钟)听力部分(35分)第一节 听力理解 ( 20分) 听下面一段对话,回答第一题。1. How many people will give the Harry Potter books as gifts?A. 250 B.750 C.1,000.听下面一段对话,回答2-4题2. What does the woman ask the man to do?A. To help her.
10、B.To look for the baby. C.To look after the baby.3.What is the baby doing?A.Washjng shoes B.Sleeping C.Brushing teeth4.How does the woman feel at first?听下面一段对话,回答5-7题。5. What do they do to protect the river?A. ct rubbish. C.Tell people to stop polluting 6.How many members do they have? A.12 B.16 C.2
11、8 7.When will they start the work? A. At 8:00a.m ,Saturday. B.At 8:00p.m Sunday. C.At 8:00 a.m Sunday听下面一段对话,回答8-10题。8. What was the boy doing when he found the sweets? A.He was cleaning his bedroom. B.He was at the party. C.He was talking with his mom. 9.How was the boy after he had the sweets? A,H
12、e was fine B.He was ill C.He felt nothing.10.When did he buy the sweets? A .Yesterday B.At Christmas. C.2 years ago.第二节 听取信息( 5分 )(2) 听一段对话,根据其内容表格的要求,在横线上填写有关的信息,将答案写在答题卷上。(共5分,每小题1分)Small things to save the Earth1.Think greenTurn off the TV to save A._ and take a shorter shower to save the water,2
13、.Shop greenBefore buying sth. Think about B _ you will really need it.3.C,_ greenUse both sides of D _ .Use old textbooks.You and your E_ can join the green action group to know more.读写部分二、找出划线部分与所给音标读音想同的选项(共5题,每小题1分)( )11.ai A. country B. dry C. carry D. everyone( ) 12. A. mountain B. daily C. tra
14、in D. wait( ) 13.: A. German B. pattern C. energy D. yesterday( ) 14.a: A. market B. area C. grammar D. earth( ) 15.g A. picnic B. article C. catch D. school三、选择正确的答案(共10分,每小题1分)( )16.-_ do you usually write to your penfriend?-Twice a week. A. How many B. How often C. How long D. How much( )17.There
15、_a rugby match tomorrow afternoon. C.will have D.is going to be( )18.Please give me_.A.two bag of apple B.two bag of apples C. two bags of apple D. two bags of apples( )19.Why not _us in the game? Its really enjoyable! A. joining B. join C. joins D. joined( )20.The bad man_ into the old ladys house
16、and took her purse away. A. breaked B. breaks C. broke D. breaking( )21.Hongkong is one of _in the world. A.the most popular cities B.the popular cities C.the most popular city D.popular city( )22.He is interested in playing _piano and_tennis. A.the,the B.a,a C.the, / D. /,the( )23._very dangerouse_
17、children _in the street.A. Its, for, play B. Its, of,play C. Its, for, to play D. Thiss, for, to play( )24.Be_,and you will do well in the English exam. A. carefull B. polite C .sure D. friendly( )25. -_ is it from here to Yangcheng Railway Station?-About two kilometres A. How often B. How far C.How soon D. How long四、完形填空(共15分,每小题分)When you wave(挥手)to a friend, you are using sign