【精品】【人教新目标版】九年级上:期末综合检测试卷(含答案)

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2022—2023年人教版九年级数学(上册)期末综合检测及答案

2022—2023年人教版九年级数学(上册)期末综合检测及答案

2022—2023年人教版九年级数学(上册)期末综合检测及答案班级: 姓名:一、选择题(本大题共10小题,每题3分,共30分)1.﹣3的相反数是( )A .13-B .13C .3-D .32.已知一个布袋里装有2个红球,3个白球和a 个黄球,这些球除颜色外其余都相同.若从该布袋里任意摸出1个球,是红球的概率为13,则a 等于( )A .1B .2C .3D .43.下列计算正确的是( )A .a 2+a 3=a 5B .1=C .(x 2)3=x 5D .m 5÷m 3=m 24.若实数a 、b 满足a 2﹣8a+5=0,b 2﹣8b+5=0,则1111b a a b --+--的值是( ) A .﹣20 B .2 C .2或﹣20 D .125.下列四个命题中,真命题有( )①两条直线被第三条直线所截,内错角相等.②如果∠1和∠2是对顶角,那么∠1=∠2.③三角形的一个外角大于任何一个内角.④如果x 2>0,那么x >0.A .1个B .2个C .3个D .4个6.函数13y x =+-的自变量x 的取值范围是( ) A .2x ≥,且3x ≠ B .2x ≥C .3x ≠D .2x >,且3x ≠ 7.如图,函数221y ax x =-+和y ax a =-(a 是常数,且0a ≠)在同一平面直角坐标系的图象可能是( )A .B .C .D .8.正比例函数y =kx (k ≠0)的函数值y 随着x 增大而减小,则一次函数y =x +k 的图象大致是( )A .B .C .D .9.如图,在方格纸中,以AB 为一边作△ABP ,使之与△ABC 全等,从P 1,P 2,P 3,P 4四个点中找出符合条件的点P ,则点P 有( )A .1个B .2个C .3个D .4个10.已知0ab <,一次函数y ax b =-与反比例函数a y x =在同一直角坐标系中的图象可能( )A .B .C .D .二、填空题(本大题共6小题,每小题3分,共18分)1.计算:2131|32|2218-⎛⎫---+÷= ⎪⎝⎭____________. 2.因式分解:3222x x y xy +=﹣__________. 3.已知关于x 的分式方程233x k x x -=--有一个正数解,则k 的取值范围为________. 4.如图1是一个由1~28的连续整数排成的“数阵”.如图2,用2×2的方框围住了其中的四个数,如果围住的这四个数中的某三个数的和是27,那么这三个数是a ,b ,c ,d 中的__________.5.如图,在扇形AOB 中,∠AOB=90°,点C 为OA 的中点,CE ⊥OA 交AB 于点E ,以点O 为圆心,OC 的长为半径作CD 交OB 于点D ,若OA=2,则阴影部分的面积为__________.6.如图,圆柱形玻璃杯高为12cm 、底面周长为18cm ,在杯内离杯底4cm 的点C处有一滴蜂蜜,此时一只蚂蚁正好在杯外壁,离杯上沿4cm与蜂蜜相对的点A 处,则蚂蚁到达蜂蜜的最短距离为___________cm.三、解答题(本大题共6小题,共72分)1.解分式方程:33122xx x -+=--2.先化简,再求值:2211(1)m mm m+--÷,其中m=3+1.3.在Rt△ABC中,∠BAC=90°,D是BC的中点,E是AD的中点.过点A作AF ∥BC交BE的延长线于点F(1)求证:△AEF≌△DEB;(2)证明四边形ADCF是菱形;(3)若AC=4,AB=5,求菱形ADCF 的面积.4.如图,已知⊙O为Rt△ABC的内切圆,切点分别为D,E,F,且∠C=90°,AB=13,BC=12.(1)求BF的长;(2)求⊙O的半径r.5.甲、乙两家快递公司揽件员(揽收快件的员工)的日工资方案如下:甲公司为“基本工资+揽件提成”,其中基本工资为70元/日,每揽收一件提成2元;乙公司无基本工资,仅以揽件提成计算工资.若当日揽件数不超过40,每件提成4元;若当日搅件数超过40,超过部分每件多提成2元.如图是今年四月份甲公司揽件员人均揽件数和乙公司搅件员人均揽件数的条形统计图:(1)现从今年四月份的30天中随机抽取1天,求这一天甲公司揽件员人均揽件数超过40(不含40)的概率;(2)根据以上信息,以今年四月份的数据为依据,并将各公司揽件员的人均揽件数视为该公司各揽件员的揽件数,解决以下问题:①估计甲公司各揽件员的日平均件数;②小明拟到甲、乙两家公司中的一家应聘揽件员,如果仅从工资收入的角度考虑,请利用所学的统计知识帮他选择,井说明理由.6.一商店销售某种商品,平均每天可售出20件,每件盈利40元.为了扩大销售、增加盈利,该店采取了降价措施,在每件盈利不少于25元的前提下,经过一段时间销售,发现销售单价每降低1元,平均每天可多售出2件.(1)若降价3元,则平均每天销售数量为________件;(2)当每件商品降价多少元时,该商店每天销售利润为1200元?参考答案一、选择题(本大题共10小题,每题3分,共30分)1、D2、A3、D4、C5、A6、A7、B8、A9、C10、A二、填空题(本大题共6小题,每小题3分,共18分)1、2+2、()2x x y -3、k<6且k ≠34、a ,b ,d 或a ,c ,d5、12π+. 6、15.三、解答题(本大题共6小题,共72分)1、x=12、33、(1)略;(2)略;(3)10.4、(1)BF =10;(2)r=2.5、(1)215;(2)39件;仅从工资收入的角度考虑,小明应到乙公司应聘.6、(1)26;(2)每件商品降价10元时,该商店每天销售利润为1200元.。

2022-2023学年新人教版初中数学九年级上册期末综合素养评价测试卷(附参考答案)

2022-2023学年新人教版初中数学九年级上册期末综合素养评价测试卷(附参考答案)

2022-2023学年新人教版初中数学九年级上册期末综合素养评价测试卷一、选择题(共12小题,满分24分,每小题2分)1.(2分)(2022秋•盱眙县期中)下列方程中是一元二次方程的是( ) A .x +y =2B .2x 2+1=0C .x 2+2x +1=x 2D .xy ﹣9=02.(2分)(2022秋•新抚区期中)下列方程中,关于x 的一元二次方程是( ) A .x 2﹣x (x +3)=0 B .ax 2+bx +c =0 C .x 2﹣2y ﹣1=0D .x 2﹣2x +3=03.(2分)(2022秋•大田县期中)用公式法解方程x 2﹣2x =3时,求根公式中的a ,b ,c 的值分别是( ) A .a =1,b =﹣2,c =3 B .a =1,b =2,c =﹣3 C .a =1,b =2,c =3D .a =1,b =﹣2,c =﹣34.(2分)(2022秋•丹江口市期中)如果m 、n 是一元二次方程x 2﹣x =5的两个实数根,那么多项式m 2﹣mn +n +1的值是( ) A .12B .10C .7D .55.(2分)(2022秋•江夏区期中)抛物线y =12x 2向左平移1个单位,再向上平移2个单位后,所得抛物线的表达式是( ) A .y =12(x +1)2﹣2 B .y =12(x +1)2+2 C .y =12(x ﹣1)2﹣2D .y =12(x ﹣1)2+26.(2分)(2022秋•西湖区校级期中)关于二次函数y =ax 2+bx +c ,自变量x 与函数y 的对应值如表,下列说法正确的是( )x … ﹣3 ﹣2 0 1 … y…7﹣2﹣27…A .图象与y 轴的交点坐标为(0,2)B .图象的对称轴是直线x =1C .y 的最小值为﹣5D.图象与x轴有且只有一个交点7.(2分)(2022秋•江夏区期中)在下列图案中,属于中心对称图形的是()A.B.C.D.8.(2分)(2022秋•法库县期中)以下说法合理的是()A.小明做了3次掷图钉的实验,发现2次钉尖朝上,由此他说钉尖朝上的概率是23B.某彩票的中奖概率是5%,那么买100张彩票一定有5张中奖C.某射击运动员射击一次只有两种可能的结果:中靶与不中靶,所以他击中靶的概率12D.小明做了3次掷均匀硬币的实验,其中有1次正面朝上,2次正面朝下,他认为再掷一次,正面朝上的概率还是129.(2分)(2022秋•开福区校级期中)如图,圆锥的底面半径为5,高为12,则该圆锥的侧面积为()A.30πB.60πC.65πD.90π10.(2分)(2022秋•市中区期中)若点A(﹣2,1)在反比例函数y=kx的图象上,则k的值是()A.12B.−12C.2D.﹣211.(2分)(2022秋•肇源县期中)如图四个由小正方体拼成的立体图形中,从正面看是的是()A.B.C.D.12.(2分)(2022秋•奉贤区期中)已知在Rt△ABC中,∠C=90°,AC=4,BC=6,那么下列各式中正确的是()A.tan A=23B.cot A=23C.sin A=23D.cos A=23二、填空题(共6小题,满分18分,每小题3分)13.(3分)(2022秋•招远市期中)在平面直角坐标系中,一次函数y=6x与反比例函数y=kx(k>0)的图象交于A(x1,y1),B(x2,y2)两点,则y1+y2的值是.14.(3分)(2022秋•新抚区期中)已知二次函数y=x2﹣2x+1,当﹣5≤x<3时,y的取值范围是.15.(3分)(2022秋•前郭县期中)如图所示的图形绕其中心至少旋转度就可以与原图形完全重合.16.(3分)(2022秋•源汇区校级月考)如图,在正五边形ABCDE中,在AB,BC边上分别取点M,N,使AM=BN,连接AN,EM交于点O,则∠EOA =.17.(3分)(2022秋•惠山区校级期中)如图,在平面直角坐标系xOy 中,点A 、B 、P 的坐标分别为(1,0),(2,3),(3,1).若点C 在第一象限内,且横坐标、纵坐标均为整数,P 是△ABC 的外心,则点C 的坐标为 .18.(3分)(2022秋•城阳区期中)在一个不透明的袋子中装有除颜色外其余均相同的n 个小球,其中15个黑球,从袋中随机摸出一球,记下其颜色,之后把它放回袋中,这称为一次摸球试验.搅匀后,再继续摸出一球.以下是利用计算机模拟的摸球试验次数与摸出黑球次数的列表: 摸球试验次数 100100050001000050000100000摸出黑球次数46487250650082499650007根据列表,可以估计出n 的值是 . 三、解答题(共9小题,满分78分)19.(8分)(2022秋•大田县期中)解下列方程: (1)x 2﹣2x ﹣8=0; (2)(x ﹣1)2=2x (x ﹣1).20.(8分)(2022秋•漳州期中)已知关于x 的方程x 2﹣2x +m ﹣2=0有两个实数根x 1,x 2.(1)求m 的取值范围;(2)若3x 1+3x 2﹣x 1x 2=5,求m 值.21.(9分)(2022秋•鄞州区校级期中)如图,在Rt△ABC中,∠ABC=90°,斜边AC的垂直平分线交BC于点D,交AC于点E,连接BE.(1)若BE是△AEC外接圆的切线,求∠C的大小;(2)当AB=4,BC=8时,求△DEC外接圆的半径.22.(9分)(2022秋•莱芜区期中)北京时间2022年6月5日10时44分,神舟十四号载人飞船在酒泉发射升空,为弘扬航天精神,某校在教学楼上从楼顶位置悬挂了一幅励志条幅GF.如图,已知楼顶到地面的距离GE为18.5米,当小亮站在楼前点B处,在点B正上方点A处测得条幅顶端G的仰角为37°,然后向教学楼方向前行15米到达点D处(楼底部点E与点B,D在一条直线上),在点D正上方点C处测得条幅底端F的仰角为42°,若AB,CD均为1.7米(即四边形ABDC为矩形),请你帮助小亮计算:(1)当小亮站在B处时离教学楼的距离BE;(2)求条幅GF的长度.(结果精确到0.1m,参考数据:sin37°≈0.60,cos37°≈0.80,tan37°≈0.75,sin42°≈0.67,cos42°≈0.74,tan42°≈0.90)23.(8分)(2022秋•如东县期中)某汽车4S店销售A,B两种型号的轿车,具体信息如下表:每辆进价(万元)每辆售价(万元)每季度销量(辆)A60x﹣x+100B50y﹣2y+150(注:厂家要求4S店每季度B型轿车的销量是A型轿车销量的2倍.)根据以上信息解答下列问题:(1)用含x的代数式表示y;(2)今年第三季度该4S店销售A,B两种型号轿车的利润恰好相同(利润不为0),试求x的值;(3)求该4S店第四季度销售这两种轿车能获得的最大利润.24.(9分)(2022秋•李沧区期中)如图所示为某商场的一个可以自由转动的转盘,商场规定顾客购物满100元即可获得一次转动转盘的机会,当转盘停止时,指针落在哪一个区域就获得相应的奖品,如表是活动进行中的统计数据:50100200500800100020005000转动转盘的次数227110931247361211933004落在“纸巾”区的次数根据以上信息,解析下列问题:(1)请估计转动该转盘一次,获得纸巾的概率是;(精确到0.1)(2)现有若干个除颜色外都相同的白球和黑球,根据(1)的结论,在保证获得纸巾和免洗洗手液概率不变的情况下,请你设计一个可行的摸球抽奖规则,详细说明步骤;(3)小明和小亮都购买了超过100元的商品,均获得一次转动转盘的机会,根据(2)中设计的规则,利用画树状图或列表的方法求两人都获得纸巾的概率.25.(9分)(2022秋•南召县期中)如图,小明在学习图形的位似时,利用几何画板软件,在平面直角坐标系中画出了△ABC的位似图形△A1B1C1.(1)在图中标出△ABC和△A1B1C1的位似中心M点的位置并写出M点的坐标.(2)若以点A 1为位似中心,请你帮小明在图中画出△A 1B 1C 1的位似图形△A 2B 2C 2,且△A 1B 1C 1与△A 2B 2C 2的位似比为2:1. (3)直接写出(2)中C 2点的坐标.26.(9分)(2022秋•宁波期中)如图,在平行四边形ABCD 中,过点A 作AE ⊥BC ,垂足为E ,连接DE ,F 为线段DE 上一点,且∠AFE =∠B . (1)求证:∠DF A =∠ECD ;(2)△ADF 与△DEC 相似吗?为什么?(3)若AB =4,AD =3√3,AE =3,求AF 的长.27.(9分)(2022秋•招远市期中)如图,一次函数y =kx +b 与反比例函数y =12x(x >0)的图象交于A (m ,6),B (n ,3)两点. (1)求一次函数的解析式;(2)若M 是x 轴上一点,S △MOB =S △AOB ,求点M 的坐标; (3)当x >0时,根据图象直接写出kx +b −12x>0时,x 的取值范围.参考答案一、选择题(共12小题,满分24分,每小题2分)1.B;2.D;3.D;4.A;5.B;6.C;7.A;8.D;9.C;10.D;11.C;12.B;二、填空题(共6小题,满分18分,每小题3分)13.014.0≤y≤1615.4516.72°17.(4,3)或(5,0)或(5,2)18.30;三、解答题(共9小题,满分78分)19.解:(1)∵x2﹣2x﹣8=0,∴(x+2)(x﹣4)=0,则x+2=0或x﹣4=0,解得x1=﹣2,x2=4;(2)∵(x﹣1)2=2x(x﹣1),∴(x﹣1)2﹣2x(x﹣1)=0,∴(x﹣1)(﹣x﹣1)=0,则x﹣1=0或﹣x﹣1=0,解得x1=1,x2=﹣1.20.解:(1)∵关于x的方程x2﹣2x+m﹣2=0有两个实数根x1、x2,∴Δ=(﹣2)2﹣4(m﹣2)=12﹣4m≥0,∴m≤3;(2)由题意得:x1+x2=2,x1•x2=m﹣2,∵3x1+3x2﹣x1x2=5,∴6﹣(m﹣2)=5,∴m=3.21.解:(1)设DC的中点为O,连接OE,∵DE垂直平分AC,∴∠DEC=90°,∴DC是△AEC外接圆的的直径,∵BE是⊙O的切线,∴∠OEB=90°,∴∠EBO+∠BOE=90°,在Rt△ABC中,E为斜边AC的中点,∴BE=EC=AE=12AC,∴∠EBO=∠C,由圆周角定理得:∠BOE=2∠C,∵∠EBO+∠BOE=90°,∠EBO=∠C,∴∠C+2∠C=90°,∴∠C=30°;(2)在Rt△ABC中,AC=√AB2+BC2=√42+82=4√5,则BE=12AC=2√5,∵∠CED=∠CBA=90°,∠ECD=∠BCA,∴△CED∽△CBA,∴CECB =CDCA,即2√58=4√5,解得:CD=5,则△DEC外接圆的半径为52.22.解:(1)延长AC交EG于H,则AB=CD=EH=1.7米,AC=BD,AH=BE,∵GE=18.5米,∴HG=EG﹣HE=18.5﹣1.7=16.8(米),在Rt△AGH中,∠GAH=37°,∴tan37°=GHAH =16.815+CH≈0.75,∴CH=7.4,∴BE=AH=15+7.4=22.4(米),答:小亮站在B处时离教学楼的距离BE为22.4米;(2)由(1)知CH=7.4米,在Rt△FCH中,∵∠FCH=42°,∴tan42°=FHCH =FH7.4≈0.90,∴FH=6.66,∴FG=GH﹣FH=16.8﹣6.66≈10.1(米),答:条幅GF的长度约为10.1米.23.解:(1)根据题意得:﹣2y+150=2(﹣x+100),整理得:y=x﹣25;(2)根据题意得:(x﹣60)(﹣x+100)=(y﹣50)(﹣2y+150),由(1)知,y=x﹣25,∴(x﹣60)(﹣x+100)=(x﹣75)(﹣2x+200),整理得:x2﹣190x+9000=0,解得x1=90,x2=100,∵x=100时利润为0,∴x的值为90;(3)设该4S店第四季度销售这两种轿车能获得的利润为w万元,则w=(x﹣60)(﹣x+100)+(y﹣50)(﹣2y+150)=(x﹣60)(﹣x+100)+(x﹣75)(﹣2x+200)=﹣3x2+510x﹣21000=﹣3(x﹣85)2+675,∵﹣3<0,∴当x=85时,w有最大值,最大值为675,答:该4S店第四季度销售这两种轿车能获得的最大利润为675万元.24.解:(1)估计转动该转盘一次,获得纸巾的概率约是0.6(精确到0.1);故答案为:0.6;(2)摸球抽奖规则:把3个白球和2个黑球放入一个不透明的袋子(5个球除颜色外都相同),顾客购物满100元即可获得一次摸球的机会,当摸到白球时奖品为纸巾,摸到黑球时奖品为免洗洗手液;(3)画树状图为:共有25种等可能的结果数,其中两人都获得纸巾的结果数为9,.所以两人都获得纸巾的概率为92525.解:(1)如图,点M为所作,M点的坐标为(0,2);(2)如图,△A2B2C2即为所求;(3)C2(﹣4,2).26.(1)证明:∵四边形ABCD是平行四边形,∴AB∥CD,∴∠B+∠ECD=180°,∵∠AFE =∠B ,∴∠AFE +∠ECD =180°,∵∠AFE +∠AFD =180°,∴∠DF A =∠ECD .(2)解:相似,理由如下:∵四边形ABCD 是平行四边形, ∴AD ∥BC ,CD =AB =4,∴∠ADF =∠CED ,又∵∠DF A =∠ECD ,∴△ADF ∽△DEC .(3)解:∵四边形ABCD 是平行四边形, ∴AD ∥BC ,∵AE ⊥BC ,∴AE ⊥AD ,在Rt △EAD 中,DE =√AE 2+AD 2=√32+(3√3)2=6, ∵△ADF ∽△DEC ,∴AD DE =AF DC ,即3√36=AF 4. ∴AF =2√3.27.解:(1)把点A 代入y =12x 得:6=12m , 解得m =2,把点A 代入y =12x 得3=12n , 解得n =4,∴A (2,6),B (4,3),设要求的一次函数的表达式为y =kx +b ,由题意得:{6=2k +b 3=4k +b, 解之得:{k =−32b =9,∴一次函数的表达式为y=−32x+9;(2)设直线AB交x轴于点P,则0=−32x+9,∴x=6,∴P(6,0),∴S△AOB =S△AOP﹣S△BOP=12×6×6−12×6×3=18−9=9,∴S△MOB=9,设点M的坐标为(m,0),∴OM=|m|,∴12×3×|m|=9,∴|m|=6,∴m=±6,∴点M的坐标为(6,0)或(﹣6,0);(3)观察图象可知,kx+b−12x>0时x的取值范围是2<x<4.。

【精校版】【人教新目标版】九年级上:期末综合检测试卷(含答案)

【精校版】【人教新目标版】九年级上:期末综合检测试卷(含答案)

人教版精品英语资料(精校版)期末综合检测一、单项选择(共15小题;共15分)1. --- How was dinner at Jane's house?--- It was great. I think Jane's mum is wonderful cook.A. a; theB. the; aC. the; theD. a; an2. --- Yesterday I lost my pencil sharpener. I couldn't find .--- Oh, it's a pity. You'd better buy this afternoon.A. it; itB. it; oneC. one; itD. one; one3. By the year 2015, all of China's museums will be free to enter. We visit any museumwithout paying.A. canB. needC. mustD. should4. The photo often makes him of his childhood.A. thinksB. thoughtC. to thinkD. think5. --- Which do you prefer, tea or coffee?--- I don't care. is fine.A. EitherB. NeitherC. BothD. All6. Allen wanted to know after it got out of the UFO.A. what is the alien doingB. what the alien would doC. where would the alien goD. where the alien is going7. --- You drive your car so fast. It's very dangerous.--- Sorry. I won't do that again.A. wouldn'tB. shouldn'tC. couldn'tD. mightn't8. --- How old is the man under the tree?--- I him to be about fifty.A. guessB. supposeC. understandD. know9. The blue skirt I bought yesterday cost me 80 yuan.A. thatB. whereC. whoD. when10. --- I think the man over there must be Bob.--- It be him. He has to Australia.A. can't; goneB. can't; beenC. may not; beenD. mustn't; gone11. --- I often have hamburgers for lunch.--- You'd better not. It's bad for you too much junk food.A. eatB. ateC. eatingD. to eat12. --- Look at the sign on the right.--- Oh, parking here.A. doesn't allowB. isn't allowedC. didn't allowedD. wasn't allowed13. ------ Yes. You can do it by yourself.A. Is it easy to make?B. What do you think of it?C. How can we start?D. He makes so many mistakes.14. Many students are willing to work hard to make their dreams true.A. comeB. cameC. comesD. coming15. --- I'm sorry to trouble you, Mr. Smith.--- .A. Fine, thank youB. All rightC. It doesn't matterD. It's very kind of you二、完形填空(共10小题;共15分)Every child has his own dream. Every child hopes to be an adult. 16 , is it really like what they imagine? As a boy 17 lives in modern times and in a modern city, I feel greater pressure(压力) on me with the city's development. Although we 18 worry about money, we still have 19 problems, such as competition among classmates and expectations from parents. These experiences are very 20 to our future. But in fact, they really give me a lot of pressure. I still clearly 21 the happiness of my childhood. 22 , we had to face the fact with time passing by. We began to feel this invisible(无形的) pressure come upon us. We 23 before sunrise and come back after sunset. We work and study like an adult, even harder. What we do is in order to 24 an excellent mark. Oh, growing up is completely boring, but we 25 try to find happiness while growing up. I think the friendship among our friends, the support from our parents and the encouragement from our teachers can help us. Why not enjoy the pleasure of growing up and its delicious taste?16. A. However B. And C. So D. Although17. A. which B. who C. whom D. whose18. A. always B. usually C. often D. seldom19. A. other B. another C. others D. the others20. A. helpful B. happy C. bad D. hard21. A. think B. remember C. forget D. find22. A. Luckily B. Unluckily C. Impossibly D. Fortunately23. A. get up B. put up C. set up D. give up24. A. become B. get C. buy D. show25. A. should B. shouldn't C. mustn't D. can't三、阅读理解(共5小题;共10分)When you learn English, you find it not clever to put an English sentence, word by word, into your own language. Take the sentence "How do you do?" as an example. If you look up each word in the dictionary, one at a time, what is your translation? It must be a wrong sentence in you own language.Languages do not just have different sounds: they are different in many ways. It's important to master(掌握) the rules for word order in the study of English, too. If the speaker puts the words in a wrong order, the listener can't understand the speaker's sentence easily. Sometimes when the order of words in an English sentence is changed, the meaning of the sentence changes. But sometimes when the order is changed, the meaning of the sentence doesn't change. Let's see the difference between the two pairs of sentences below."She only likes apples." "Only she likes apples.""I have seen the film already." "I have already seen the film."When you are learning English, you must do your best to get the spirit of the language and use it as the English speaker does.26. From the passage we know that when we are learning English, .A. we shouldn't put every word into our own languageB. we should look up every word in the dictionaryC. we need to put every word into our own languageD. we must read word by word27. The writer thinks it is in learning English.A. difficult to understand different soundsB. impossible to remember the word orderC. important to master the rules in different waysD. easy to master the rules for word order28. We can learn from the passage that .A. the meaning of an English sentence always changes with the order of words.B. the order of words can never change the meaning of an English sentenceC. sometimes a different order of words has a different meaningD. if the order of words is different, the meaning of the sentence must be different29. "She only likes apple" .A. is the same as "Only she likes apples"B. is different from "Only she likes apples"C. means "She likes fruit except apples"D. means "She doesn't like apples"30. Which is the best title for this passage?A. Different Orders, Different MeaningsB. How to Speak EnglishC. How to Put English into Our Own LanguageD. How to Learn English四、阅读与表达(判断式)(共5小题;共10分)Young people are often unhappy when they are with their parents. They say that their parents don't understand them. They often think their parents are too strict with them, and they are never given a free hand.Parents often find it difficult to win their children's trust and they seem to forget how they themselves felt when they were young.For example, young people like to do things without much thinking. It's one of their ways to show that they grow up and they can do with any difficult things. Older people worry more easily. Most of them plan things ahead and don't like their plans to be changed.When you want your parents to let you do something, you will have better success if you ask before you really start doing it.Young people often make their parents angry by clothes they want, the music they enjoy and something else. But they don't mean to cause any trouble. They just feel that in this way they can be cut off from the old people's world and they want to make a new culture of their own. And if their parents don't like their music or clothes or their manner of speech, the young people feel very unhappy. Sometimes you even don't want your parents to say, "Yes" to what you do. You want to stay at home alone and do what you like.If you plan to control your life, you'd better win your parents' trust and try to get them to understand you. If your parents see that you have a high sense of responsibility, they will certainly give you the right to do what you want to do.根据短文内容,判断正误,正确的为T,错误的为F。

2024年全新九年级数学上册期末试卷及答案(人教版)

2024年全新九年级数学上册期末试卷及答案(人教版)

2024年全新九年级数学上册期末试卷及答案(人教版)一、选择题(每题2分,共20分)1. 下列哪个数是质数?A. 2B. 4C. 6D. 82. 一个三角形的两边长分别为5厘米和8厘米,第三边长为多少厘米?A. 3B. 6C. 10D. 123. 下列哪个图形是等腰三角形?A. △ABCB. △DEFC. △GHID. △JKL4. 下列哪个图形是直角三角形?A. △ABCB. △DEFC. △GHID. △JKL5. 下列哪个图形是等边三角形?A. △ABCB. △DEFC. △GHID. △JKL6. 下列哪个数是合数?A. 2B. 3C. 4D. 57. 一个正方形的边长为6厘米,它的周长是多少厘米?A. 12B. 18C. 24D. 308. 一个长方形的长为8厘米,宽为4厘米,它的面积是多少平方厘米?A. 16B. 24C. 32D. 409. 下列哪个数是偶数?A. 2B. 3C. 5D. 710. 下列哪个数是奇数?A. 2B. 3C. 4D. 6二、填空题(每题2分,共20分)1. 一个等边三角形的边长是5厘米,它的周长是______厘米。

2. 一个正方形的边长是8厘米,它的面积是______平方厘米。

3. 一个长方形的长是10厘米,宽是5厘米,它的周长是______厘米。

4. 一个三角形的两边长分别是6厘米和8厘米,第三边长是______厘米。

5. 一个直角三角形的两条直角边长分别是3厘米和4厘米,它的斜边长是______厘米。

6. 一个等腰三角形的底边长是10厘米,腰长是8厘米,它的周长是______厘米。

7. 一个长方形的长是12厘米,宽是6厘米,它的面积是______平方厘米。

8. 一个正方形的边长是7厘米,它的周长是______厘米。

9. 一个三角形的两边长分别是5厘米和12厘米,第三边长是______厘米。

10. 一个直角三角形的两条直角边长分别是5厘米和12厘米,它的斜边长是______厘米。

人教版九年级上学期数学《期末检测试卷》含答案

人教版九年级上学期数学《期末检测试卷》含答案
14.如图, 是⊙O上的点,若 ,则 ___________度.
15.已知 ,且 ,且 与 周长和为175,则 的周长为_________.
16.在国庆节的一次同学聚会上,每人都向其他人赠送了一份小礼品,共互送110份小礼品,则参加聚会的有______名同学.
17.已知 , 是方程 的两个实根,则 ______.
23.如图,在Rt△ABC中,∠C=90°,BC=8,tanB= ,点D在BC上,且BD=AD.求AC的长和cos∠ADC的值.
24.如图,某反比例函数图象的一支经过点A(2,3)和点B(点B在点A的右侧),作BC⊥y轴,垂足为点C,连结AB,AC.
(1)求该反比例函数的解析式;
(2)若△ABC的面积为6,求直线AB的表达式.
∵188>187, > ,
∴平均数变小,方差变小,
故选A.
点睛:本题考查了平均数与方差的定义:一般地设n个数据,x1,x2,…xn的平均数为 ,则方差S2= [(x1- )2+(x2- )2+…+(xn- )2],它反映了一组数据的波动大小,方差越大,波动性越大,反之也成立.
5.方程x(x﹣5)=x的解是()
[详解]解:∵∠A=22.5°,
∴∠BOC=2∠A=45°,
∵⊙O的直径AB垂直于弦CD,
∴CE=DE, 为等腰直角三角形,
∴CE=
∴CD=2CE= .
故选:C.
[点睛]本题考查了圆周角定理:在同圆或等圆中,同弧或等弧所对的圆周角相等,都等于这条弧所对的圆心角的一半.也考查了等腰直角三角形的性质和垂径定理,掌握以上知识是解题的关键.
C. 平均数变大,方差变小D. 平均数变大,方差变大
[答案]A
[解析]

人教版数学九年级上册期末测试卷及参考答案(精练)

人教版数学九年级上册期末测试卷及参考答案(精练)

人教版数学九年级上册期末测试卷考试时间:90分钟姓名:__________ 班级:__________考号:__________题目单选题填空题计算题作图题综合题总分评分*注意事项*1、填写答题卡的内容用2B铅笔填写nn2、提前5分钟收取答题卡评卷人得分一、单选题 (共 11 题,共 22 分)1、 (2分) 下列命题中,是真命题的是()A:三角形的外心到三角形三边的距离相等B:顺次连接对角线相等的四边形各边中点所得的四边形是菱形C:方程x2+2x+3=0有两个不相等的实数根D:将抛物线y=2x2-2向右平移1个单位后得到的抛物线是y=2x2-32、 (2分) 全等三角形又叫做合同三角形,平面内的合同三角形分为真正合同三角形与镜面合同三角形,假设△ABC和△A1B1C1是全等(合同)三角形,点A与点A1对应,点B与点B1对应,点C与点C1对应,当沿周界A→B→C→A,及A1→B1→C1→A1环绕时,若运动方向相同,则称它们是真正合同三角形(如图1),若运动方向相反,则称它们是镜面合同三角形(如图2),两个真正合同三角形都可以在平面内通过平移或旋转使它们重合,两个镜面合同三角形要重合,则必须将其中一个翻转180°,下列各组合同三角形中,是镜面合同三角形的是( )A:B:C:D:3、 (2分) 下列图形可以由一个图形经过平移变换得到的是()A:B:C:D:4、 (2分) 已知是二元一次方程组的解,则的值为()A:-1B:1C:2D:35、 (2分) 若是下列某二元一次方程组的解,则这个方程组为()A:B:C:D:6、 (2分) 下列语句中,正确的个数有()①、有两个不同顶点的外角是钝角的三角形是锐角三角形;②、有两条边和一个角相等的两个三角形是全等三角形;③、方程用关于的代数式表示y是y=6-3x;④、三角形的三条角平分线的交点到三个顶点的距离相等。

A:0个B:1个C:2个D:3个7、 (2分) 如果3x2n﹣1y m与﹣5x m y3是同类项,则m和n的取值是()A:3和﹣2B:﹣3和2C:3和2D:﹣3和﹣28、 (2分) 若关于的不等式组有实数解,则实数的取值范围()A:B:C:D:9、 (2分) 不等式组的解集是()A:x>﹣1B:x>3C:﹣1<x<3D:x<310、 (2分) 已知不等式组的解集为,则()A:2013B:C:D:111、 (2分) 下列说法中,正确的是()A:“打开电视,正在播放河南新闻节目”是必然事件B:某种彩票中奖概率为10%是指买十张一定有一张中奖C:神州飞船发射前要对各部件进行抽样检查D:了解某种节能灯的使用寿命适合抽样调查评卷人得分二、填空题 (共 5 题,共 10 分)1、 (2分) 写出有一个解是的二元一次方程:.(写出一个即可)2、 (2分) 某品牌电脑的成本为2400元,售价为2800元,该商店准备举行打折促销活动,要求利润率不低于5%,则这种品牌的电脑最低可打折销售.3、 (2分) 不等式组的解集是.4、 (2分) 不等式组的解集.5、 (2分) 七年级某班共有30名学生,调查该班学生每周用于做数学作业的时间,在这个调查中.总体是.评卷人得分三、计算题 (共 4 题,共 40 分)1、 (10分) 计算:.2、 (10分) 若方程组的解中值是值的3倍,求的值.3、 (10分) 解方程组4、 (10分) 解不等式:评卷人得分四、作图题 (共 3 题,共 30 分)1、 (10分) 如图,在边长为1个单位长度的小正方形组成的12×12网格中,给出了四边形ABCD的两条边AB与BC,且四边形ABCD是一个轴对称图形,其对称轴为直线AC.①试在图中标出点D,并画出该四边形的另两条边;②将四边形ABCD向下平移5个单位长度,画出平移后得到的四边形A′B′C′D′.2、 (10分) 如图,在边长为1的小正方形组成的网格中,将△ABC向右平移5个单位长度,再向上平移4个单位长度,得到△A1B1C1.(1) 在网格中画出△A1B1C1;(2) 求△ABC的面积.3、 (10分) 如图,传说诸葛亮孔明率精兵与司马仲达对阵,孔明一挥羽扇,军阵瞬时由上图变为下图,其中只移动了其中3骑而已,请问如何移动?评卷人得分五、综合题 (共 1 题,共 10 分)1、 (10分) 体育课上,老师为了解女学生定点投篮的情况,随机抽取名女生进行每人次定点投篮的测试,进球数的统计如图所示.(1) 求女生进球数的平均数、众数;(2) 投球4次,进球3个以上(含3个)为优秀,全校有女生480人,估计为“优秀”等级的女生约为多少人?【试卷答案及解析】===单选题答案解析=== 单选题第1题:答案:单选题第1题:解析:单选题第1题:考点:单选题第2题:答案:单选题第2题:解析:单选题第2题:考点:单选题第3题:答案:单选题第3题:解析:单选题第3题:考点:单选题第4题:答案:单选题第4题:解析:单选题第4题:考点:单选题第5题:答案:单选题第5题:解析:单选题第5题:考点:单选题第6题:答案:单选题第6题:解析:单选题第6题:考点:单选题第7题:答案:单选题第7题:解析:单选题第7题:考点:单选题第8题:答案:单选题第8题:解析:单选题第8题:考点:单选题第9题:答案:单选题第9题:解析:单选题第9题:考点:单选题第10题:答案:单选题第10题:解析:单选题第10题:考点:单选题第11题:答案:单选题第11题:考点:===填空题答案解析=== 填空题第1题:答案:填空题第1题:解析:填空题第1题:考点:填空题第2题:答案:填空题第2题:考点:填空题第3题:答案:填空题第3题:解析:填空题第3题:考点:填空题第4题:答案:填空题第4题:考点:填空题第5题:答案:填空题第5题:解析:填空题第5题:考点:===计算题答案解析=== 计算题第1题:答案:计算题第1题:解析:计算题第1题:考点:计算题第2题:解析:计算题第2题:考点:计算题第3题:答案:计算题第3题:解析:计算题第3题:考点:计算题第4题:答案:计算题第4题:解析:计算题第4题:考点:===作图题答案解析===作图题第1题:答案:作图题第1题:解析:作图题第1题:考点:作图题第2题:答案:作图题第2题:答案:作图题第2题:解析:作图题第2题:考点:作图题第3题:答案:作图题第3题:解析:作图题第3题:考点:===综合题答案解析=== 综合题第1题:答案:综合题第1题:答案:综合题第1题:解析:综合题第1题:考点:。

人教版九年级数学上册期末综合测试题(含答案)

人教版九年级数学上册期末综合测试题(含答案)
11.
12.
13.
14.
15.20
16.(1)解: ,




∴ , ;
(2)解: ,


或 ,
∴ , ;
(3)解: ,
化简整,得 ,

或 ,
∴ , .
17.(1)解:∵参与 活动的人数为36人,占总人数 ,
∴总人数 人,
则参与 活动的人数为: (人);
补全统计图如下:
(2)解:扇形 的圆心角为: ,
A.18°B.28°C.37°D.58°
10.如图,某公司准备在一个等腰直角三角形 的绿地上建造一个矩形的休闲书吧 ,其中点P在 上点N,M分别在 , 上,记 , ,图中阴影部分的面积为S,若 在一定范围内变化,则y与x,S与x满足的函数关系分别是()
A.一次函数关系,一次函数关系B.二次函数关系,一次函数关系
(3)解: 与 相交于 点,如图3,

为 的直径,
四边形 是 的神奇四边形,

, , ,
, ,
在 中, ,

设 ,则 ,
在 中, ,
解得 ,
即 ,
在 中, ,



23.(1)பைடு நூலகம்明:∵ ,
∴ ,
∴ ,
∴弦 平分圆周角 ,
∴圆中存在“爪形 ”;
(2)延长 至点E,使得 ,连接 ,
∵ ,
∴ ,
∵ , ,
根据以上信息,解答下列问题:
(1)参与此次抽样调查的学生人数是______人,补全统计图①;
(2)图②中扇形C的圆心角度数为______度;
(3)若参加成果展示活动的学生共有3600人,估计其中最喜爱“测量”项目的学生人数是多少;

最新人教版九年级语文(上册期末)综合能力测试卷及答案

最新人教版九年级语文(上册期末)综合能力测试卷及答案

最新人教版九年级语文(上册期末)综合能力测试卷及答案满分:120分考试时间:120分钟一、语言的积累与运用。

(35分)1、下列加点字的读音完全正确的一项是( )A.积淀.(diàn) 谦.让(qiān) 遗憾.(hàn) 大发雷霆.(tíng) B.涵.养(hán) 允.诺(yǔn) 妨碍.(ài) 矫.揉造作(jiāo) C.愚蠢.(chǔn) 恪.守(gè) 典.范(diǎn) 絮絮叨.叨(dāo) D.尴.尬(gān) 谚.语(yàn) 箴.言(jiān) 自吹自擂.(léi)2、下列词语书写没有错别字的一项是()A.颁发震憾磨肩接踵哗众取宠B.禁锢劳碌战战惊惊丝豪不爽C.俯瞰斟酌正经危坐如坐针毡D.鼎盛意蕴信手拈来雕梁画栋3、下列句子中加点成语使用不正确的一项是( )A.两年前,世界大学生运动会就在这美轮美奂....的建筑中上演了一部青春序曲。

B.茫茫人海中,能够与一个人萍水相逢....,即便是擦肩而过,也是一种难得的缘分。

C.冰雪初融,江河日下....,涓涓细流润泽万物,春天在人们不知不觉中悄然而至。

D.大型武术舞台剧《太极秀》融合声光电技术,场面极其壮观,令人叹为观止....。

4、下列句子中没有语病、表意明确的一项是()A.湖南农业大学“耘园”油菜花试验田里的油菜花相继开放,成为校园中一道靓丽的风景线。

B.随着清明节的到来,使长沙各墓园迎来今年清明集中祭扫首个小高峰,逾5万市民前往墓园祭祀故人。

C.虽然益生菌能够帮助肠道消化食物,消灭致病微生物,但切忌不要滥用益生菌。

D.中国选手武大靖在平昌冬奥会短道速滑男子500米决赛中勇夺金牌,使国人对短道速滑项目的兴趣大大改善。

5、从表情达意上看,下面既生动又恰当的一项是()A.几棵野菊,柔弱的茎上撑着小小的黄花,雄赳赳地立在路旁。

B.面对着这幽林秀水,佳木野花,我仿佛喝了香甜的美酒,心都醉了。

人教新目标版九年级英语上学期期末考试试题 (含答案)(共6套)

人教新目标版九年级英语上学期期末考试试题 (含答案)(共6套)

九年级英语上学期期末教学质量检测试题说明:请将正确答案按照要求填写在答题卡上.一、听力选择(共15小题,计15分)Ⅰ、请听录音中八组短对话.每组对话后有一个小题,从题中所给的A、B、C三个选项中,选出与对话内容相符的图片或能回答所给问题的最佳符合.听完每段对话后,你都将有10秒钟的时间回答有关小题和阅读下一小题.每段对话读两遍.(共8分)1.When invention are they talking about?2.What did Peter use to be afraid of?3.Where will Jack attend a meeting?4.Which is right according to the dialog?A. They make their houses beautiful.B. They turn on lights.C. They light candles.5.What kind of music does Tom like best?A. Popular music.B. Quiet music.C. Electronic music.6.Whom must the book belong to?A. Katie.B. Emily.C. Katie’s sister.7.How did the man go to work?A. By taxi.B. By bus.C. By car.8.How does Fen learn English?A. By watching English movies.B. By reading English books.C. By talking with foreigners.Ⅱ、请听录音中三段较长的对话.每段对话后有几个小题,从题中所给的A、B、C三个选项中,选出能回答所给问题的最佳答案.(每段对话读两遍)(共7分)听下面一段对话,回答第9-10小题.9.How long has Joy been away?A. Four or five days.B. Four or five weeks.C. Four or five months.10.How many times has the man been there?A. Many times.B. Several times.C. Only once.听下面一段对话,回答第11-12小题.11.What can you see zippers on?A. dresses, trousers, shoes, bags.B. daily lives.C. Almost everywhere.12.When was the zipper invented?A. In 1891.B. In 1893.C. In 1883.听下面一段对话,回答第13-15小题.13.Who did a wrong thing at the party?A. SatoB. MarieC. The boy14.Which is right according to the conversation?A. The boy didn’t bow to Sato.B. Sato didn’t shake hands with John.C. Sato kissed John.15.Did the girl know how to greet French people when she met Marie first?A. Yes, she did.B. No, she didn’t.C. We don’t know from the conversation.(注意:请翻到第Ⅱ卷,找到第三大题,继续做听力填词题.)二、阅读理解(共15小题,计30分)阅读下面短文,从每小题A、B、C、D四个选项中,选出能回答所提问题的最佳答案.AFour famous Places of Interest In ShanghaiThe zoo was finished in November 1995. It has an area of about47 thousand square meters. You can see more than 400 kinds ofanimals. It is not only a zoo but also a scientific park aboutanimals. Both adults and children enjoy visiting the zoo.Phone:62687775It was given back to China in August 1943. This beach is agood place for partying and beach sports. During the summer,people come here drinking, eating and having a party. There isalso a pool for children.Phone:63586888The huge park was built in September 2009 in Shanghai. It’sfamous for large roller coasters(过山车). On the weekends insummer, there’s a sunny day. So you have to be patient to wait.Phone:33552222The garden was built in September 2000. It covers an areaof 130 thousand square kilometers. There are many kinds of greentrees and beautiful flowers. It is a good place for taking a walkor having a picnic.Phone:6275386916.Band Beach is a good place for .A. partying and beach sportsB. having a picnicC. seeing animalsD. taking a walk17.Happy Valley is famous for .A. a scientific park about animalsB. a deep pool to get wetC. large roller coastersD. many kinds of green trees18.Shanghai Yin Hongqiao Center Garden was built .A. in August, 1943B. in November, 1995C. in September, 2009D. in September, 2000BI still remember quite clearly the day when my parents got divorced(离婚). Dad kissed me goodbye and left.For a long time Mum and I lived a peaceful life. Then one day, Jim came over for lunch wearing a blue suit with a short brown tie and a green shirt. I couldn’t believe this was going to be my new stepfather. It couldn’t be true that my beautiful mother would many someone who dressed like a clown(小丑). I hated him.Lunch was terrible. Mother kept trying to start a conversation. But neither Jim nor I would say much. Finally I offered to bring in the dessert just to get away from the clown. Something unpleasant happened, but I didn’t mean to do it. I guess the plate slipped. But one minute I was handing Jim his blackberry pie, and the next, dark purple berries were oozing(渗出) all over his shirt and tie.I was mortified. My face turned bright red. Jim looked very much surprised at first, but then he began to laugh. I started to laugh too. Maybe this guy was all right, after all. Then I had a quick look at my mother. She looked happier than I had seen her in a long time.19.The writer thinks Jim’s clothes look .A. niceB. expensiveC. funnyD. usual20.From the story we might guess that .A. Jim didn’t seem likeable at firstB. the writer liked Jim from the startC. Jim was angry with the writerD. Jim didn’t like blackberry pie21.In this story the word “mortified” means .A.高兴的B.无聊的C.尴尬的D.生气的22.The best title for this story would be ,A. I Love PieB. Mothers Shouldn’t MarryC. The World’s Worst LunchD. My New StepfatherCYour brain controls everything you do. It makes it possible for you to think, learn, create and feel; to blink(眨眼) and breathe and for your heart to heat ---- this fantastic control center is your brain. It is so amazing that a famous scientist once called it “the most complex(复杂) thing we have yet discovered in our universe”.Can this small grey organ(器官), which weighs less than one and a half kilos, really do so much? Amazingly, your brain contains about 100 billion neurons(神经元) – it would take you over 3,000 years to count them all. Believe it or not, the activity in your brain never stops. Your neurons create and send more messages than all the phones in the world. And although one neuron creates only a little electricity, all your neurons together can produce enough electricity to power a light bulb(灯泡).So exactly how fast does your brain work? Well, imagine this: a bee lands on your foot. Neurons in your skin send this information to your brain at a speed of more than 240 kilometers per hour. Your brain then uses other neurons to send the message back to your foot to shake the bee off quickly. These neurons can send this information at more than 320 kilometers per hour. No computer has your brain’s unbelievable ability to deal with the amount of information coming from your eyes, ear and other sensory organs.But how does your brain allow you to learn things that you will use in the future? The structure(结构) of your brain changes very time you have a new thought, remember or learn something. For example, riding a bike seems impossible at first, but soon you are able to do it. How? As you practice, your brain sends “bike riding” messages again and again. Soon, the actions are learnt and you are able to ride a bike easily from then on.23.From the passage we know that neurons .A. send messages to your brainB. are only found in your skinC. receive messages very slowlyD. need electricity to work24.In Paragraph 3, the writer mentions computers to .A. say that computers have no abilitiesB. show how fast they have becomeC. compare them with the human brainD. ask people to use computers more25.When you have a new thought, .A. your brain will power a light bulbB. the structure of your brain changesC. you remember somethingD. your heart beats faster26.The article is mainly about .A. all the steps when your brain learns thingsB. the things you can do to make your brain work fasterC. bow the brain makes people smarter than computersD. What an unbelievable organ the human brain isDIt was Molly’s job to hand her father his brown paper lunch bag each morning before he went to work. One morning, Molly handed him his usual lunch bag with another paper bag. “Why two bags?” her father asked. “The other is something else,” Molly answered. “What’s in it?”“Just some interesting things. Take it with you.”Not wanting to discuss the matter, be took both bags with him, kissed Molly and rushed off. At soon, he opened Molly’s bag and took out the following things: two hair hands, three small stones, a plastic fish, a tiny sea shell, a small doll, and …… The busy father smiled, finished eating, and swept the desk clean into the wastebasket, including Molly’s things.That evening, Molly ran up behind him as he read the paper.“Where’s my bag?”“What bag?”“The one I gave you this morning.” “ I left it at the office. Why?” “I forgot to put this note in it.” she said, “Daddy, the things in the bag ate the things I really like –I thought you might like to play with them. You didn’t lose the bag, did you, Daddy?”“Oh, no,” he said, lying(撒谎). “I just forgot to bring it home. I’ll bring it tomorrow.” Then he unfolded the note that read; “I love you, Daddy.” Molly had given him her treasures.Love in a paper bag, and he missed it – not only missed it, but also had thrown it in the wastebasket. So he went back to the office and found the wastebasket. He took out the special bag and carried it home carefully. The bag didn’t look so good, but the things were all there.After dinner, he asked Molly to tell him about the things in the bag. It took a longtime to tell. Everything had a story or a memory.Life is like a long journey. The journey with the people we love is all that really matters(要紧). It is such a simple truth but it is so easily forgotten.27.Why did Molly give her father a second bag?A. She didn’t want to keep the things in the bag.B. She hoped those things would bring happiness to her father.C. She wanted to remind her father of the stories behind the thingsD. She enjoyed playing with her father.28.How did Father deal with the bag after he opened it?A. He threw it into the wastebasket.B. He took it back home.C. He kept it in the drawer.D. He put it on his table.29.After the father heard what his daughter said, he felt .A. sadB. surprisedC. sorryD. satisfied30.Which of the following is the best title of the passage?A. An important journey.B. Two bags.C. Father and daughter.D. Love in a paper bag.第Ⅱ卷(非选择题共55分)三、听力填词(共5小题,计5分)听下面一段独白.根据所听到的内容,写出可以填入下表1-5空格处的适当单词,每空限填一词.(独白读两遍)四、单词拼写与运用(共8小题,计8分)根据句意完成已给出首字母或汉语提示的单词,使补全后的句子意思通顺,语法正确.1.The nurse is p enough to take care of this sick woman who gets angry easily.2.His father asked p , “Would you mind passing me the keys?”3.He m his own life when his father was away.4.—Do you think the of this skirt suits me?-- Of course! You always book beautiful in red.5.I don’t think I have the (勇气) to tell him the bad news.6.All the students in our city go to school every day (除了) weekends.7.It’s impossible to (分离) Diaoyu Island from China.8.Mary never feels lonely because she has a large (圈) of friends.1. 2. 3. 4. 5. 6. 7. 8.五、综合填空(共10小题,计10分)阅读下面短文,在空白处填入1个行当的单词或用括号内单词的正确形式.It is reported that a law has been approved() in Spain. Spanish children may soon 1 (require) to help out with housework by law.2 law would be part of a wider child protection, and children under the age of 18 have to3 (join) in all areas of family life. That includes housework and other work in the family. The rules come under a section of the law called “the rights and duties of children”.Along with doing housework, children would also have to be respectful to their parents and teachers, and would do 4 (well) in their studies than before. 5 the law doesn’t say anything about punishment for children who don’t obey the law.Married Spanish men an also face punishment for refusing to do housework –requiring men to share in household duties, and care of children and elder family members.Children should learn to do different 6 (kind) of housework at different ages, but it is almost impossible 7 Chinese children. They seem to avoid such 8 (usually) housework at similar ages, because their families 9 (protect) them too much since theywere born. Children should realize that they are part of the families and have responsibilities(责任) on taking care of 10 (they) and the family members.1. 2. 3. 4. 5. 6. 7. 8. 9. 10.六、完型填空(共7小题,计7分)阅读短文,从方框中选择行当的词填空,每空一词.(方框中有两个词多余选项,每词限用一次)I used to watch a little girl playing basketball every day from my kitchen window. One day I asked her why she practiced so 1 . She said, “I want to go to college. The only way I can do is to get a scholarship(奖学金). I like basketball and I want to be the 2 player in college. My dad told me, ‘If the dream is big enough, the facts don’t count(影响).’”She never changed her mind. I watched her through those junior high years and into senior high school. One day before she graduated form high school, I saw her sitting on the grass 3 . I asked her what was wrong. She told me that her coach said she was too short to be a good basketball player, so she should stop 4 about going to college. She was heartbroken and it made me feel bad, too. Then she smiled and told me her father said that her coach was wrong. He did not understand the power(力量) of dream. Her father said to her, “If you 5 want to play for the scholarship of a good college, nothing but you yourself can stop your dream.” He told her again, “If the dream is big enough, the facts don’t count.”The next year, she and her team went to a big game. She was 6 by a coach of a famous college team and was offered a scholarship to the 7 basketball team of their college. She was to get the college education that she had dreamed of and worked toward for all those years.“If the dream is big enough, the facts don’t count.” It is true.1. 2. 3. 4. 5. 6. 7.七、阅读表达(共5小题,计10分)There was a little boy whose name was Peter. He lived in a village close to the sea. The villagers built sea walls to keep sea water from the doors of the houses. But once the sea walls almost put the village in great danger.One day Peter was walking on his way back home along the sea wall when it began to rain. All of a sudden, he saw a hole in the wall, from which the sea water was running. Peter shouted for help because he know the hole meant that the sea was making its way through the sea wall, but no answer came. He realized he should do something else as quickly as possible, or the sea water could be pouring over the whole village. He started to rush towards his village. At the same time, the rain became heavier and heavier.It was getting dark, but Peter rushed on and on. He felt cold and hungry. In the rainstorm, he fell down over and over again. Many times he thought about giving up, but he fought on. He remembered his father’s words, “Lots of strong men have made every effort to build the walls which can keep the village safe form danger. Me sea walls are really important.” Finally when the boy’s father saw him, Peter had been black and blue all over. The boy told the villages what had happened to the sea wall. They repaired it in time. “Thank God! He saved the village,” they praised Peter. All the villagers called him “Peter the Guard” form then on. Peter’s parents were really proud of him!1.Where did Peter live?( no more than 9 words)2.What did Peter do first after he saw a hole in the wall?( No more than 4 words)3.How did Peter feel when he rushed on and on?( no more than 5 words)4.请将为文中画线句子翻译成汉语.5.请给短文拟一个适当的英文标题.八、写作(共1小题,计15分)为了进一步增强中学生的安全意识,提高自我保护能力,学校将开展以“安全”为主题的英语演讲比赛.请你根据以下要点提示和要求写一篇演讲稿.注意:1.内容必须包括所给的全部要点,可适当发挥;2.表达清楚,语句通顺,意思连贯,书写规范;3.文中不得出现与你身份相关的信息;4.词数:80—100.短文开关已经出,不计入总词数.How to Keep SafeAs teenagers, we should always keep safe in mind. But bow can we keep safe? Here are some of my suggestion.In a word, safety must come first!2017-2018学年度第一学期期末教学质量检测九年级英语试题参考答案听力材料及答案第一部分听力选择Ⅰ1.W:When was the telephone invented?M:It was invented in 1876.2.W:Peter, you have changed a lot.M:Yeah, I used to be afraid of snakes, but now I’m braver.3.W:Is Jack in the office?M:No, he’s gone to Paris. He will attend a meeting there tomorrow.4.W:What do people do on Halloween?M:Manhy people make their houses scary. They may turn off lights and light candles.5.W:Tom, what kind of music do you like?M:I like popular music best.6.M:Emily, I found a book about Harry Porter. Is it yours?W:No, it’s not mine. It must belong to Katie’s sister. She is crazy about Harry Porter.7.W:I didn’t see you on the bus this morning.M:By the time I got to the bus stop, the bus had left, so I went to work by taxi. 8.M:Fen, your English is pretty good. How do you learn it?W:I learn it by watching English movies.Ⅱ听下面一段对话,回答第9-10小题.W:Where is Joy?M:She has gone to Changsha.W:How many days has she spent there?M:Four or five days.W:Have you ever been there?M:Yes, but only once.W:When did you go there?M:Two days age.听下面一段对话,回答第11-12小题.Paul: Hey Roy, the subject for my school project is “Small inventions that changed the world.” Can you help me think of an invention?Roy: My pleasure! Let me think …hmm…I know! The Zipper!Paul: The zipper? Is it really such a great invention?Roy: Think about how often it’s used in our daily lives. You can see zippers on dresses, trousers, shoes, bags… almost everywhere!Paul: Well, you do seem to have a point…Roy: Of course! I thought about it because I saw a website last week. The pioneers of different inventions were listed there. For example, it mentioned that the zipper was invented by Whitcomb Judson in 1893. But at that time, it wasn’t used widely.Paul: Really? So when did it become popular?Roy: Around 1917.听下面一段对话,回答第13-15小题.Katie: How was the welcome party for foreign students last night?John: Great! I made some new friends. But a funny thing happened.Katie: What?John: That’s how people in Japan are expected to greet each other. It’s impolite if you don’t bow.John: I didn’t know that. So I just stood there with my hand out. Finally, I returned the bow.Katie: I remember when I first met Marie last year. I did the same thing. I held out my hand and to my surprise, she kissed me on both sides of my face!John: I wouldn’t mind that!Katie: Very funny. Later I found out French people are supposed to kiss when they see each other.Ⅲ、听力填词Hi, I’m Linda. I’d like to tell you one of my special memories at Junior High School.Last summer I worded as a volunteer in a children hospital. There were more than 200 children there at that time. One weekend, I arrived there with some friends by bike. The children were very happy. And some of them stayed out to greet us. I gave away some new nice clothes to them. Tina was smart and she brought some paper and pencils. She told the children to draw pictures to cheer them up. John was funny and sctive. He played games with them outside. We stayed there the whole day and enjoyed outselves.第Ⅰ卷(选择题共45分)1-15小题,每小题1分,共15分1-5 BBACA 6-10 CAAAC 11-15 CBCBB16-30小题,每小题2分,计30分16-18 ACD 19-22 CACD 23-26 ACBD 27-30 BACD第Ⅱ卷(非选择题共55分)三、听力填词1.summer2. 2003.clothes4.draw5. active四、单词拼写与运用(共8小题,计8分)1.patient2.politely3.managed4.style5.courage6.except7.aeparate8.circle五、语法填空(共10小题,计10分)1.be required2.The3.join4.better5.But6.kinds7.forual9.have protected 10.themselves六、完型填空(共7小题,计7分)1.much2.best3.sadly4.dreaming5.really6.seen7.women’s七、阅读表达(共5小题,计10分)1.In a village close to the sea.2.He shouted for help.3.He felt cold and hungry.(评分要求:根据文章合理作答,与答案意思相近,语言准确)4.他意识到他应忙地采取其他措施,否则海水就会淹没整个村庄.(评分要求:忠于原句,语句通顺,无语言错误)5.Peter the Guard(评分要求:根据文章合理作答,与答案意思相近,语言准确)八、写作(共1题,计15分)评分说明:评分时,可根据内容和语言表达等方面分为四个档次,具体要求请参考2015初中学业水平考试说明与指导184页.二、听对话或独白,根据对话或独白的内容,从下面各题所给的A、B、C三个选项中选择最佳选项。

人教版九年级数学上册期末综合复习测试题(含答案)

人教版九年级数学上册期末综合复习测试题(含答案)

人教版九年级数学上册期末综合复习测试题(含答案)时间:100分钟 总分:120分一、 选择题(每题3分,共24分)1.已知关于x 的方程()222310---=m m x x +是一元二次方程,则m 的值为( ) A .2m =B .4m =C .2m =±D .2m =-2.如图,将AOB ∆绕点O 按逆时针方向旋转40°后得到A OB ''△,若15AOB ∠=︒,则AOB '∠的度数是 ( )A .25°B .30°C .35°D .40°3.顶点(2,1),且开口方向、形状与函数22y x =的图像相同的抛物线是 ( ) A .221y x =+ B .22(2)1y x =-+ C .22(2)1y x =++D .22(2)1y x =+-4.把方程2630x x +-=化成2)x m n (的形式,则m n += ( ) A .15-B .9C .15D .65.如图,ABC ∆内接于O ,直径8cm AD =,=60B ∠︒,则AC 的长度为 ( )A .5cmB .42C .43D .6cm6.在一个不透明的口袋中有红色、黄色和绿色球共60个,它们除颜色外,其余完全相同.在不倒出球的情况下,要估计袋中各种颜色球的个数.同学们通过大量的摸球试验后,发现摸到红球、黄球和绿球的频率分别稳定在20%,40%和40%.由此,推测口袋中黄色球的个数有( ) A .15个B .20个C .21个D .24个7.在同一坐标系中,一次函数y ax k =+与二次函数2y kx a =+的图象可能是 ( )A .B .C .D .8.二次函数2y ax bx c =++的图像如图所示,对称轴是直线1x =.下列结论:①0abc >;②30a c +>;③a c b +<-;④520a b c -+<.其中结论正确的个数为 ( )A .1个B .2个C .3个D .4个二、填空题(每题3分,共24分)9.若n 是方程2210x x --=的一个根,则代数式232n n -+-的值是________. 10.如图,AB 是半圆的直径,C 、D 是半圆上的两点,且20BAC =︒∠,点D 是AC 的中点,则BAD ∠=______.11.点()()1122,,,A x y B x y 在二次函数232y x x =-++的图像上,若122x x <<-,则1y 与2y 的大小关系是1y _______________2y .(用“>”、“<”、“=”填空)12.已知关于x 的一元二次方程2()0(,,a x h k a h k -+=都是常数,且0)a ≠的解为1213x x =-=,,则方程2(1)0(,,a x h k a h k --+=都是常数,且0)a ≠的解为___________.13.如图,正方形ABCD 的边长为3,点E 为AB 的中点,以E 为圆心,3为半径作圆,分别交AD 、BC 于M 、N 两点,与DC 切于P 点.则图中阴影部分的面积是______.14.如图,正方形OABC 的顶点B 在抛物线2y x 的第一象限的图象上,若点B 的纵坐标是横坐标的2倍,则对角线AC 的长为_________.15.如图,抛物线2y ax c =+与直线y mx n =+交于()1,A p -,()3,B q 两点,则不等式2ax mx c n ++<的解集是__________.16.如图,以(0,3)G 为圆心,半径为6的圆与x 轴交于A ,B 两点,与y 轴交于C ,D 两点,点E 为⊙G 上一动点,CF AE ⊥于F ,点E 在G 的运动过程中,线段FG 的长度的最小值为______.三、解答题(每题8分,共72分) 17.解方程: (1)(2)(3)12x x --= (2)23410x x -+=18.已知关于x 的一元二次方程24250x x m --+=有两个实数根. (1)求m 的取值范围;(2)若该方程的两个根都是符号相同的整数,直接写出它的根.19.已知二次函数图像与x 轴两个交点之间的距离是4个单位,且顶点M 为()14-,,求二次函数的解析式.20.如图,抛物线2(0)y ax bx c a =++≠与直线1y x =+相交于(-10)A ,,(4)B m ,两点,且抛物线经过点(50)C ,(1)求抛物线的解析式;(2)点P 是抛物线上的一个动点(不与点A .点B 重合),过点P 作直线PD ⊥x 轴于点D ,交直线AB 于点E.当PE =2ED 时,求P 点坐标;(3)点P 是直线上方的抛物线上的一个动点,求ABP ∆的面积最大时的P 点坐标.21.一个不透明的口袋中有四个完全相同的小球.把它们分别标记为1,2,3,4.(1)随机摸取一个小球的标号是偶数,该事件的概率为______;(2)小雨和小佳玩摸球游戏,两人各摸一个球,谁摸到的数字大谁获胜.小雨先从口袋中摸出一个小球,不放回,小佳再从口袋中摸出一个小球.用画树状图(或列表)的方法,分别求出小雨和小佳获胜的概率.22.如图,已知女排球场的长度OD 为20米,位于球场中线处的球网AB 的高度2.24米,一队员站在点O 处发球,排球从点O 的正上方2米的C 点向正前方飞去,排球的飞行路线是抛物线的一部分,当排球运行至离点O 的水平距离OE 为6米时,到达最高点G ,以O 为原点建立如图所示的平面直角坐标系.(1)写出C 点坐标___________;B 点坐标___________.(2)若排球运行的最大高度为3米,求排球飞行的高度p (单位:米)与水平距离x (单位:米)之间的函数关系式(不要求写自变量x 的取值范围);(3)在(2)的条件下,这次所发的球能够过网吗?如果能够过网,是否会出界?请说明理由.23.如图,在Rt ABC △中,90ACB ∠=︒,延长CA 到点D ,以AD 为直径作O ,交BA 的延长线于点E ,延长BC 到点F ,使BF EF =.(1)求证:EF 是O 的切线.(2)若9OC =,4AC =,8AE =,则BC =______,BE =______.24.如图,已知等边ABC ,直线AM BC ⊥,点M 为垂足,点D 是直线AM 上的一个动点,线段CD 绕点D 顺时针方向旋转60°得线段DE ,联结BE 、CE .(1)如图1,当点D 在线段AM 上时,说明BE AB ⊥的理由;(2)如图2,当点D 在线段MA 的延长线上时,设直线BE 与直线AM 交于点F ,求BFM ∠的度数;(3)定义:有一个内角是36︒的等腰三角形称作黄金三角形,联结DB ,当DBE 是黄金三角形吋,直接写出BEC ∠为______度.25.抛物线2y ax 2x c =++与x 轴交于(1,0)A -、B 两点.与y 轴交于点(0,3)C 、点(,3)D m 在抛物线上.(1)求抛物线的解析式.(2)如图1,连接BC 、BD ,点P 在对称轴左侧的抛物线上,若PBC DBC ∠=∠,求点P 的坐标.(3)如图2,过点A 的直线∥m BC ,点Q 是直线BC 上方抛物线上一动点,过点Q 作QE m ⊥,垂足为点E ,连接BE ,CE ,CQ ,QB .当四边形BECQ 的面积最大时,求点Q 的坐标及四边形BDCQ 面积的最大值。

2020-2021学年人教版新目标九年级上册期末考试试题及答案

2020-2021学年人教版新目标九年级上册期末考试试题及答案

人教版新目标九年级上册期末考试试题(满分120 分,考试时间100 分钟)第一部分:基础知识运用(共两节;满分40分)第一节单项选择(共20小题;每小题1分,满分20分)从每小题所给的四个选项中选出最佳选项,并在答题卡上将该项涂黑。

()1.She usually has egg and some porridge for breakfast.A. an,theB. an,\C. a,theD. a,\()2. -I have two soccer balls,what about you?-Oh,I don't have .A.someB. noC. anyD. much( )3. The film reminded him _____ what he had seen in American.A. toB. inC. ofD. for( )4. What animal do you like ______, a dog, a cat or a pig?A. wellB. betterC. bestD. very( )5. He traveled all over the world _____ he had a man-made leg.A. ifB. asC. becauseD. though( )6. Not only I but also Tom and Jack _____ interested in English because it _____ useful.A. is, isB. is, areC. are, isD. are, are( )7. I can’t go _____ because I have to go home at once.A. else anywhereB. anywhere elseC. else nowhereD. somewhere else( )8. Why does this woman decided _____ these places?A. not goB. doesn’t goC. not goingD. not to go( )9. Would you please help me _____ the picture on the wall?A. put upB. put onC. put intoD. put off( )10. Excuse me, could you _____ me your new dictionary?A. borrowB. keepC. lendD. take( )11. He is a _____ boy, so he can’t go to the park by himself.A. six-year-oldB. six year oldC. six-years-oldD. six years old ( )12. We have never seen _____ good a car _____ this.A. as, asB. so, asC. such, thatD. so, that( )13. _____ of them is a farm worker.A. BothB. AllC. NeitherD. Some( )14. It _____ us five hours to work out the problem.A. costB. spentC. paidD. took( )15. Let’s write them _____ before we forget them.A. downB. onC. toD. With( )16.-----Why don’t you take your lovely dog with you?-----It ______ for a long time. I feel lonely without him.A . has been dead B. died C. is dying D. was died( )17..Almost all the boys in our class are ________playing football. They play it a lot after school.A. interested atB. interesting inC. interesting atD. interested in( )18. The computer is still quite warm . It ________be used by somebody just now.A. mustB. mustn’tC. needD. can’t( )19. This story happened _____ the night of January twenty-first.A. atB.onC. inD. of( )20. Tom told me he had some problems _______ Chinese. He wanted me to help him.A. speakingB. talkingC. tellingD. saying第二节完形填空(共10 小题;每小题2 分,满分20分)先通读下面短文,掌握其大意,然后从短文后面各题所给的选项中选出最佳选项,并在答题卡上将该项涂黑。

人教版九年级数学上册期末综合检测试卷(有答案)

人教版九年级数学上册期末综合检测试卷(有答案)

【期末专题复习】人教版九年级数学上册期末综合检测试卷学校:__________ 班级:__________ 姓名:__________ 考号:__________一、选择题(本题共计 10 小题,每题 3 分,共计30分,)1. 已知关于的方程的一个根是,则实数的值是()A. B. C. D.2. 若二次函数(、为常数)的图象如图,则的值为()A. B. C. D.3. 已知,中,∠,斜边上的高为,以点为圆心,为半径的圆与该直线的交点个数为()A.个B.个C.个D.个4. 如图,是等边三角形的外接圆,的半径为,则等边三角形的边长为()A. B. C. D.5. 某商品的进价为每件元.当售价为每件元时,每星期可卖出件,现需降价处理,为占有市场份额,且经市场调查:每降价元,每星期可多卖出件.现在要使利润为元,每件商品应降价()元.A. B. C. D.6. 如图,抛物线与轴交于点,顶点坐标为,与轴的交点在、之间(包含端点).有下列结论:①当时,;②;③;④.其中正确的有()A.个B.个C.个D.个7. 用配方法解方的配方过程正确是()A.将原方程配方B.将原方程配方C.将原方程配方D.将原方程配方8. 如图,将边长为的正六边形,在直线上由图的位置按顺时针方向向右作无滑动滚动,当第一次滚动到图位置时,顶点所经过的路径的长为()A. B.C. D.9. 已知二次函数的图象如图所示,对称轴为直线,则下列结论正确的是()A. B.方程的两根是,C. D.当时,随的增大而减小10. 如图,中,∠,,以为直径的圆交于点,则图中阴影部分的面积为()A. B. C. D.二、填空题(本题共计 10 小题,每题 3 分,共计30分,)11. 方程:的解是:________.12. 某农场拟建两间矩形饲养室,一面靠现有墙(墙足够长),中间用一道墙隔开,并在如图所示的三处各留宽的门.已知计划中的材料可建墙体(不包括门)总长为,则能建成的饲养室面积最大为________.13. 有一扇形的铁皮,其半径为,圆心角为,若用此扇形铁皮围成一个圆锥形的教具(不计接缝),则此圆锥的高是________.14. 小华和小丽做游戏:抛掷两枚硬币,每人各抛掷次,小华在次抛掷中,成功率为,则她成功了________次,小丽成功率为,则她成功了________次.15. 钟表分针的运动可看作是一种旋转现象,一只标准时钟的分针匀速旋转,经过分钟旋转了________ 度.16. 某射手在一次射击中,射中环、环、环的概率分别是、、,那么,这个射手在这次射击中,射中环或环的概率为________;不够环的概率为________.17. 如图,将绕点逆时针旋转,得到′′,使′恰好经过点,连接′,则∠′的度数为________.18. 一个不透明的塑料袋中有个小球,其中个红球和个白球,它们除颜色外其余都相同,摸出一个球记下颜色后放回,再摸出一个小球,则两次摸出的小球恰好颜色不同的概率是________.19. 如图,在方格纸上建立的平面直角坐标系中,将绕点按顺时针方向旋转,得到,那么点的坐标为________.20. 已知二次函数的图象如图所示,下列结论:①;②;③;④与都是负数,其中结论正确的序号是________.三、解答题(本题共计 9 小题,共计60分,)21.(12分) 解下列方程:(1)(3)22.(5分) (原创题)如图所示,轴,且,点坐标为,若:(1)写出,坐标;(2)你发现,,,坐标之间有何特征?23.(5分) 已知函数是二次函数.(1)求的值;(2)写出这个二次函数图象的对称轴和顶点坐标.24. (5分)如图已知直线的函数解析式为,点从点开始沿方向以个单位/秒的速度运动,点从点开始沿方向以个单位/秒的速度运动.如果、两点分别从点、点同时出发,经过多少秒后能使的面积为个平方单位?25. (5分)如图,是的直径,是的弦,直径过的中点.求证:.26.(7分) 对于抛物线.对于抛物线.它与轴交点的坐标为________,与轴交点的坐标为________,顶点坐标为________;利用以上信息解答下列问题:若关于的一元二次方程(为实数)在的范围内有解,则的取值范围是________.27. (7分)某童装店在服装销售中发现:进货价每件元,销售价每件元的某童装每天可售出件.为了迎接“六一儿童节”,童装店决定采取适当的促销措施,扩大销售量,增加盈利.经调查发现:如果每件童装降价元,那么每天就可多售出件.(1)如果童装店想每天销售这种童装盈利元,同时又要使顾客得到更多的实惠,那么每件童装应降价多少元?(2)每件童装降价多少元时,童装店每天可获得最大利润?最大利润是多少元?28. (7分)如图,是的内接三角形,∠是的一个外角,∠,∠的平分线分别交与点、.若连接,则与有怎样的位置关系?为什么?29.(7分) 某商场购进一种每件价格为元的新商品,在商场试销发现:销售单价(元/件)与每天销售量(件)之间满足如图所示的关系:(1)求出与之间的函数关系式;(2)如果商店销售这种商品,每天要获得元利润,那么每件商品的销售价应定为多少元?(3)写出每天的利润与销售单价之间的函数关系式;若你是商场负责人,会将售价定为多少,来保证每天获得的利润最大,最大利润是多少?参考答案与试题解析【期末专题复习】人教版九年级数学上册期末综合检测试卷一、选择题(本题共计 10 小题,每题 3 分,共计30分)1.【答案】D【考点】一元二次方程的解【解析】把代入方程,得到的一元一次方程,解出的值即可.2.【答案】C【考点】二次函数图象上点的坐标特征【解析】根据图象开口向下可知,又二次函数图象经过坐标原点,把原点坐标代入函数解析式解关于的一元二次方程即可.3.【答案】A【考点】直线与圆的位置关系【解析】根据直线和圆的位置关系与数量之间的联系进行判断.若,则直线与圆相交;若,则直线于圆相切;若,则直线与圆相离.4.【答案】C【考点】正多边形和圆【解析】首先连接,,过点作于,由是等边的外接圆,即可求得∠的度数,然后由三角函数的性质即可求得的长,又由垂径定理即可求得等边的边长.5.【答案】A【考点】一元二次方程的应用【解析】设售价为元时,每星期盈利为元,那么每件利润为,原来售价为每件元时,每星期可卖出件,所以现在可以卖出件,然后根据盈利为元即可列出方程解决问题.6.【答案】C【考点】二次函数图象与系数的关系【解析】①由抛物线的顶点坐标的横坐标可得出抛物线的对称轴为,结合抛物线的对称性及点的坐标,可得出点的坐标,由点的坐标即可断定①正确;②由抛物线的开口向下可得出,结合抛物线对称轴为,可得出,将代入中,结合即可得出②不正确;③由抛物线与轴的交点的范围可得出的取值范围,将代入抛物线解析式中,再结合即可得出的取值范围,从而断定③正确;④结合抛物线的顶点坐标的纵坐标为,结合的取值范围以及的取值范围即可得出的范围,从而断定④正确.综上所述,即可得出结论.7.【答案】D【考点】解一元二次方程-配方法【解析】配方法的一般步骤:把常数项移到等号的右边;把二次项的系数化为;等式两边同时加上一次项系数一半的平方.8.【答案】A【考点】弧长的计算旋转的性质【解析】连,,,作,利用正六边形的性质分别计算出,,而当第一次滚动到图位置时,顶点所经过的路径分别是以,,,,为圆心,以,,,,为半径,圆心角都为的五条弧,然后根据弧长公式进行计算即可.9.【答案】B【考点】二次函数图象与系数的关系抛物线与x轴的交点【解析】根据抛物线的开口方向,对称轴,与轴、轴的交点,逐一判断.10.【答案】C【考点】扇形面积的计算【解析】从图中的图形关系看出阴影部分的面积可以简化成一个三角形的面积,然后通过已知条件求出面积.二、填空题(本题共计 10 小题,每题 3 分,共计30分)11.【答案】,【考点】解一元二次方程-因式分解法【解析】通过提取公因式对等式的左边进行因式分解,然后解方程.12.【答案】【考点】二次函数的应用【解析】设垂直于墙的材料长为米,则平行于墙的材料长为,表示出总面积即可求得面积的最值.13.【答案】【考点】圆锥的计算【解析】根据题目提供的数据求出扇形的弧长,根据扇形的弧长等于圆锥地面的周长求出圆锥的半径,然后在圆锥的高、母线和底面半径构造的直角三角形中求圆锥的高.14.【答案】,【考点】概率的意义【解析】用抛掷次数乘以成功率即可.15.【答案】【考点】生活中的旋转现象【解析】根据钟表面的知识,钟表上分针走过一个小格转过的度数是,走过分钟,乘以,计算即可得解.16.【答案】,【考点】概率公式【解析】“射中环或环”意思就是射中环和射中环的总和,由此可得到所求的概率;“不够环”意思就是射中、、、、、、环,我们可以从反面入手,求出射中、、环的概率,然后再用减去这个概率,得到所求的概率.17.【答案】【考点】旋转的性质【解析】先根据旋转的性质得到∠∠′′,于是得到∠′∠∠′′.18.【答案】【考点】列表法与树状图法【解析】首先根据题意画出树状图,然后由树状图求得所有等可能的结果与两次摸出的球恰好颜色不同的情况,再利用概率公式即可求得答案.19.【答案】【考点】坐标与图形变化-旋转【解析】抓住旋转的三要素:旋转中心,旋转方向顺时针,旋转角度,通过画图得.20.【答案】②③【考点】二次函数图象与系数的关系【解析】根据函数的开口方向,对称轴以及与轴的交点即可确定,,的符号,从而判断①;根据对称轴的位置即可判断②;根据二次函数与轴的交点的坐标,即可确定的范围,确定与的大小,从而判断的符号;根据和时,点的坐标的符号判断④.三、解答题(本题共计 9 小题,共计60分)21.【答案】解:(1)因式分解,得,所以或,解得,或;(2)移项得,,变形得,,因式分解,得,解得,或;(3)移项得,,因式分解得,,解得或;(4)化简得:即解得或.【考点】解一元二次方程-因式分解法换元法解一元二次方程【解析】(1)方程左边可以利用十字相乘法进行因式分解,因此应用因式分解法解答.(2)先移项,然后把因式分解为,然后再提取公因式,因式分解即可.(3)先移项,然后用提取公因式法对左边进行因式分解即可.(4)把看作是一个整体,然后套用公式,进行进一步分解,故用因式分解法解答.22.【答案】解:(1)∵轴,点坐标为,点,∴点、的纵坐标分别是,,∵,∴,.(2)∵,横、纵坐标互为相反数,∴关于原点对称,同理,,关于原点对称.【考点】关于原点对称的点的坐标【解析】(1)根据平行于轴的直线的特点、以及得出,坐标;(2)对比的坐标得出他们之间的特征.23.【答案】解:(1)由是二次函数,得且.解得;(2)当时,二次函数为,,,,对称轴为,11试卷第!异常的公式结尾页,总14页12顶点坐标为.【考点】二次函数的定义二次函数的性质【解析】(1)根据二次函数的定义:是二次函数,可得答案;(2)根据的对称轴是,顶点坐标是,可得答案.24.【答案】解:∵直线的函数解析式为,∴点,点.设运动时间为,则,,根据题意,得:,解得:,,(舍去),.∴经过秒、秒或秒后能使的面积为个平方单位【考点】一元二次方程的应用【解析】根据直线的解析式可得出点、的坐标,设运动时间为,则,,根据三角形的面积即可得出关于的一元二次方程,解方程即可得出结论.25.【答案】证明:连接,∵,为中点,∴,∵过,∴弧弧弧,∵∠∠,∴弧弧,∴.【考点】垂径定理【解析】连接,根据等腰三角形性质得出,根据垂径定理求出弧弧弧,求出弧弧,即可得出答案.26.【答案】,,,【考点】抛物线与x轴的交点二次函数的图象二次函数的性质【解析】据正方形的性质可以确坐标,先出的解析式,再由的标就可求的析;如图、图作,于,根据定理就可以求出点的纵坐标从而点的坐,根据直角三性质就可以∠的度数,平行性就可以得∠的度数.当在轴的方时如同可以得结论.27.【答案】童装店应该降价元.(2)设每件童装降价元,可获利元,根据题意,得,化简得:∴答:每件童装降价元童装店可获得最大利润,最大利润是元【考点】一元二次方程的应用二次函数的应用【解析】(1)设每件童装降价元,利用童装平均每天售出的件数每件盈利每天销售这种童装利润列出方程解答即可;(2)设每件童装降价元,可获利元,利用上面的关系列出函数,利用配方法解决问题.28.【答案】解:垂直平分.理由如下:∵平分∠,平分∠,∴∠∠,∠∠,∴∠∠∠∠,即∠,∴为的直径,∵平分∠,∴∠∠,∴,13试卷第!异常的公式结尾页,总14页14∴垂直平分.【考点】圆周角定理圆心角、弧、弦的关系【解析】先利用角平分线定义和平角定义计算出∠,则利用圆周角定理的推论得到为的直径,由平分∠得∠∠,根据圆周角定理得,于是根据垂径定理的推论可得垂直平分.29.【答案】设与之间的函数关系式为,由所给函数图象可知:,解得:.故与的函数关系式为;根据题意,得:,整理,得:,解得:或,答:每件商品的销售价应定为元或元;∵,∴,∴当时,最大,∴售价定为元/件时,每天最大利润元.【考点】一元二次方程的应用二次函数的应用【解析】(1)待定系数法求解可得;(2)根据“每件利润销售量总利润”列出一元二次方程,解之可得;(3)根据以上相等关系列出函数解析式,配方成顶点式,利用二次函数性质求解可得.。

2019-2020学年人教版新目标九年级上册期末考试试题及答案

2019-2020学年人教版新目标九年级上册期末考试试题及答案

人教版新目标九年级上册期末考试试题(满分120 分,考试时间100 分钟)第一部分:基础知识运用(共两节;满分40分)第一节单项选择(共20小题;每小题1分,满分20分)从每小题所给的四个选项中选出最佳选项,并在答题卡上将该项涂黑。

()1.She usually has egg and some porridge for breakfast.A. an,theB. an,\C. a,theD. a,\()2. -I have two soccer balls,what about you?-Oh,I don't have .A.someB. noC. anyD. much( )3. The film reminded him _____ what he had seen in American.A. toB. inC. ofD. for( )4. What animal do you like ______, a dog, a cat or a pig?A. wellB. betterC. bestD. very( )5. He traveled all over the world _____ he had a man-made leg.A. ifB. asC. becauseD. though( )6. Not only I but also Tom and Jack _____ interested in English because it _____ useful.A. is, isB. is, areC. are, isD. are, are( )7. I can’t go _____ because I have to go home at once.A. else anywhereB. anywhere elseC. else nowhereD. somewhere else( )8. Why does this woman decided _____ these places?A. not goB. doesn’t goC. not goingD. not to go( )9. Would you please help me _____ the picture on the wall?A. put upB. put onC. put intoD. put off( )10. Excuse me, could you _____ me your new dictionary?A. borrowB. keepC. lendD. take( )11. He is a _____ boy, so he can’t go to the park by himself.A. six-year-oldB. six year oldC. six-years-oldD. six years old ( )12. We have never seen _____ good a car _____ this.A. as, asB. so, asC. such, thatD. so, that( )13. _____ of them is a farm worker.A. BothB. AllC. NeitherD. Some( )14. It _____ us five hours to work out the problem.A. costB. spentC. paidD. took( )15. Let’s write them _____ before we forget them.A. downB. onC. toD. With( )16.-----Why don’t you take your lovely dog with you?-----It ______ for a long time. I feel lonely without him.A . has been dead B. died C. is dying D. was died( )17..Almost all the boys in our class are ________playing football. They play it a lot after school.A. interested atB. interesting inC. interesting atD. interested in( )18. The computer is still quite warm . It ________be used by somebody just now.A. mustB. mustn’tC. needD. can’t( )19. This story happened _____ the night of January twenty-first.A. atB.onC. inD. of( )20. Tom told me he had some problems _______ Chinese. He wanted me to help him.A. speakingB. talkingC. tellingD. saying第二节完形填空(共10 小题;每小题2 分,满分20分)先通读下面短文,掌握其大意,然后从短文后面各题所给的选项中选出最佳选项,并在答题卡上将该项涂黑。

九年级数学上学期期末综合测试卷 人教新课标版

九年级数学上学期期末综合测试卷 人教新课标版

九年级(上)期末综合测试卷及答案〔新人教版〕一、选择题〔每题3分,共30分〕1. 过(23-, 25)点的反比例函数的图象应在 ……………………………( ) A. 第一、三象限 B. 第二、四象限 C. 第一、二象限 D. 第一、四象限2. 把抛物线y =3x 2向右平移一个单位, 那么所得抛物线的解析式为…………… ( ) A. y =3(x +1)2B. y =3(x -1)2C. y =3x 2+1 D. y =3x 2-1 3. 二次函数y=a (x -1)2+b 有最小值-1, 那么a , b 的大小关系为……………… ( ) A. a <b B. a =b C. a >b D. 大小不能确定 4. 如图,AB 是⊙O 的直径,BC BD =,∠A =25°, 那么∠BOD 的度数为〔 〕 A. 25° B. 50° C. 12.5° D. 30° 5. 反比例函数xky =的图象与直线y=-x+1相交于A , B 两点, 点O 为坐标轴的原点, 那么∠AOB 可能是……………………………………………………………… ( ) A. 锐角 B. 钝角 C. 锐角或钝角 D. 直角 6. 如图,身高为1.6m 的某学生想测量一棵大树的高度,她沿着树影BA 由B 到A 走去,当走到C 点时,她的影子顶端正好与树的影子顶端重合,测得BC =3.2m , CA =0.8m, 那么树的高度为…〔 〕A. 4.8mB. 6.4mC. 8mD. 10m7. 过⊙O 内一点M 的最长的弦为6cm, 最短的弦长为4cm, 那么OM 的长为 ( ) A. 5cm B. 3cmC. 3cmD. 2cm8. 如图, 四边形ABCD 内接于⊙O , 对角线AC 、BD 相交于E , 那么以下各比例式中一定正确的选项是…………………………… ( ) A.DE CE BE AE = B.AB BD CD AC = C.CD AB BC AD = D.ECEDBE AE =9. 以下关于相似的说法:①所有的等腰直角三角形一定相似;②所有的菱形一定相似;③所有的全等三角形一定相似;④所有的位似图形一定相似;⑤所有的有一个角为60°的等腰梯形一定相似. 其中说法正确的有 ………………( ) A. 5个 B. 4个 C. 3个 D. 2个10. 老师给出一个函数,甲、乙、丙、丁四位同学各指出这个函数的一个性质:甲:函数图象不经过第三象限;乙:函数图象经过第一象限;丙:当x <2时,y 随x 的增大而减小;丁:当x <2时,y >0. 这四位OD C BAE ODCBA同学的表达都正确,那么以下三个函数:①xy 1=(x >0);②y =-x +2;③y=(x -2)2中,均满足上述所有性质的函数有………………………………………………………………………………〔 〕 A. 0个 B. 1个 C. 2个 D. 3个 二、填空题〔每题4分,共24分〕11. 在某一电路中,电源电压U 保持不变为220V , 电流I (单位:A )与电阻R (单位:Ω)呈反比例关系, 那么当电路中的电流I 为44A 时, 电路中电阻R 的取值为 Ω.12. 二次函数y=ax 2+bx +c 的图象与x 轴相交于(-1, 0)和(5, 0)两点, 那么该抛物线的对称轴是 .13. 写出二次函数y =3x 2与反比例函数3y x=的两个相同点: (1) ;(2) ..14. 如图,这是中央电视台“曲苑杂谈〞中的一副图案,它是一扇形图形,其中∠AOB 为120°,OC 长为8cm ,CA 长为12cm ,那么阴影局部的面积为 cm 2(结果保存π). 15. 在中国地理地图册上,测得上海到香港间的距离为5.4cm ,上海到台湾间的距离为3cm ,香港到台湾间的距离为3.6cm.飞机从台湾直飞上海的距离约为1286千米,那么飞机从台湾绕道香港再到上海的飞行距离约为 千米.16. 正方形内接于圆心角为90°,半径为10的扇形〔即正方形的各顶点都在扇形上〕,那么这个正方形的边长为 . 三、解答题〔共46分〕17. (此题6分) 如图, 现有边长为1, a (其中a >1)的一张矩形纸片, 现要将它剪裁出三个小矩形 (大小可以不同, 但不能有剩余), 使每个矩形都与原矩形相似, 请画出两种不同和裁剪方案的示意图, 并写出相应的a 的值(不必写过程).1 1a = a =18. (此题6分) 一个圆锥的高线长为63, 侧面展开图是半圆,求这个圆锥的全面积. 19. (此题6分) 抛物线y=ax 2+4x +c 与x 轴交于(1, 0)和(3, 0)两点.(1)求抛物线的解析式;(2)求出(1)中的抛物线的顶点坐标.20. (此题6分) 质量一定的二氧化碳的体积V 与密度ρ成反比例函数关系. 当体积V =5m 3时, 它的密度ρ=1.98kg/m 3.A COB(1)求ρ与V 的函数关系式; (2)假设V =a (m 3), 18.19+=a ρ(kg/m 3), 求a 的值. 21. (此题6分) 某广告公司设计一幅周长为12米的矩形广告牌, 广告设计费为每平方米1000元, 设矩形的一边长为x 米, 面积为S .(1)求S 与x 之间的函数关系式, 并确定自变量x 的取值范围;(2)为使广告牌美观、大方, 要求做成黄金矩形(即矩形的宽与长之比是黄金分割数0.618), 请你诸出广告公司可获得的设计费是多少?(精确到元).22. (此题8分) 如图, 圆心角∠AOB =120°, 弦AB =23cm. (1) 求⊙O 的半径r ;(2) 求劣弧AB 的长(结果保存π).24. (此题8分) 如图,直线y=-x +20与x 轴、y 轴分别交于A 、B 两点,动点P从A 点开始在线段AO 上以每秒3个长度单位的速度向原点O 运动. 动直线EF 从x 轴开始以每秒1个长度单位的速度向上平行移动〔即EF ∥x 轴〕,并且分别与y 轴、线段AB 交于E 、F 点. 连结FP ,设动点P 与动直线EF 同时出发,运动时间为t 秒. (1) 当t =1秒时,求梯形OPFE 的面积.(2) t 为何值时,梯形OPFE 的面积最大,最大面积是多少?(3) 设t 的值分别取t 1、t 2时(t 1≠t 2),所对应的三角形分别为△AF 1P 1和△AF 2P 2.试判断这两个三角形是否相似,请证明你的判断.参考答案一、选择题〔每题3分,共30分〕 1. 过(23, 5)点的反比例函数的图象应在 ……………………………( )A. 第一、三象限B. 第二、四象限C. 第一、二象限D. 第一、四象限 答案:B2. 把抛物线y =3x 2向右平移一个单位, 那么所得抛物线的解析式为…………… ( ) A. y =3(x +1)2B. y =3(x -1)2C. y =3x 2+1 D. y =3x 2-1 答案:B3. 二次函数y=a (x -1)2+b 有最小值-1, 那么a , b 的大小关系为……………… ( )BAOB AyOF E xPA. a <bB. a =bC. a >bD. 大小不能确定 解析:二次函数有最小值, 故a >0;又最小值为-1, 故b = -1. 答案:C4. 如图,AB 是⊙O 的直径,BC BD =,∠A =25°, 那么∠BOD 的度数为………………………………………………〔 〕 A. 25° B. 50° C. 12.5° D. 30° 答案:B5. 反比例函数xky =的图象与直线y=-x+1相交于A , B 两点, 点O 为坐标轴的原点, 那么∠AOB 可能是……………………………………………………………… ( ) A. 锐角 B. 钝角 C. 锐角或钝角 D. 直角 答案:C6. 如图,身高为1.6m 的某学生想测量一棵大树的高度,她沿着树影BA 由B 到A 走去,当走到C 点时,她的影子顶端正好与树的影子顶端重合,测得BC =3.2m , CA =0.8m, 那么树的高度为…〔 〕A. 4.8mB. 6.4mC. 8mD. 10m 答案:C7. 过⊙O 内一点M 的最长的弦为6cm, 最短的弦长为4cm, 那么OM 的长为 ( )A. 5cmB. 3cmC. 3cmD. 2cm 答案:A8. 如图, 四边形ABCD 内接于⊙O , 对角线AC 、BD 相交于E , 那么以下各比例式中一定正确的选项是…………………………… ( ) A.DE CE BE AE = B.AB BD CD AC = C.CD AB BC AD = D.ECEDBE AE =答案:D9. 以下关于相似的说法:①所有的等腰直角三角形一定相似;②所有的菱形一定相似;③所有的全等三角形一定相似;④所有的位似图形一定相似;⑤所有的有一个角为60°的等腰梯形一定相似. 其中说法正确的有 ………………( )A. 5个B. 4个C. 3个D. 2个 答案:B10. 老师给出一个函数,甲、乙、丙、丁四位同学各指出这个函数的一个性质:甲:函数图象不经过第三ODC B AEODC BA象限;乙:函数图象经过第一象限;丙:当x <2时,y 随x 的增大而减小;丁:当x <2时,y >0. 这四位同学的表达都正确,那么以下三个函数:①xy 1=(x >0);②y =-x +2;③y=(x -2)2中,均满足上述所有性质的函数有………………………………………………………………………………〔 〕 A. 0个 B. 1个 C. 2个 D. 3个 答案:D二、填空题〔每题4分,共24分〕11. 在某一电路中,电源电压U 保持不变为220V , 电流I (单位:A )与电阻R (单位:Ω)呈反比例关系, 那么当电路中的电流I 为44A 时, 电路中电阻R 的取值为 Ω. 答案:512. 二次函数y=ax 2+bx +c 的图象与x 轴相交于(-1, 0)和(5, 0)两点, 那么该抛物线的对称轴是 . 答案:直线x =213. 写出二次函数y =3x 2与反比例函数3y x=的两个相同点: (1) ;(2) ..答案:如都经过〔1,3〕点,x <0时y 都随x 的增大而减小,它们的图象都是曲线、都经过第一象限等.14. 如图,这是中央电视台“曲苑杂谈〞中的一副图案,它是一扇形图形,其中∠AOB 为120°,OC 长为8cm ,CA 长为12cm ,那么阴影局部的面积为 cm 2(结果保存π). 答案:112π15. 在中国地理地图册上,测得上海到香港间的距离为5.4cm ,上海到台湾间的距离为3cm ,香港到台湾间的距离为3.6cm.飞机从台湾直飞上海的距离约为1286千米,那么飞机从台湾绕道香港再到上海的飞行距离约为 千米. 答案:385816. 正方形内接于圆心角为90°,半径为10的扇形〔即正方形的各顶点都在扇形上〕,那么这个正方形的边长为 . 答案:52或210 三、解答题〔共46分〕17. (此题6分) 如图, 现有边长为1, a (其中a >1)的一张矩形纸片, 现要将它剪裁出三个小矩形 (大小ACOB可以不同, 但不能有剩余), 使每个矩形都与原矩形相似, 请画出两种不同和裁剪方案的示意图, 并写出相应的a 的值(不必写过程). 1 1a = a = 解:a =3 a =218. (此题6分) 一个圆锥的高线长为63, 侧面展开图是半圆,求这个圆锥的全面积.解:∵180=360r l⋅, ∴l =2r . 又∵l 2=r 2+()632, ∴l =6, r =3.∴S 全=πrl +πr 2=27π.19. (此题6分) 抛物线y=ax 2+4x +c 与x 轴交于(1, 0)和(3, 0)两点.(1)求抛物线的解析式;(2)求出(1)中的抛物线的顶点坐标.解:(1)陇望蜀把(1, 0)和(3, 0)代入解析式, 得{409120a c a c ++=++=, 解得{13a c =-=-. ∴抛物线解析式为y=-x 2+4x -3. (2)∵ y =-(x -2)2+1, ∴顶点坐标为(2, 1).20. (此题6分) 质量一定的二氧化碳的体积V 与密度ρ成反比例函数关系. 当体积V =5m 3时, 它的密度ρ=1.98kg/m 3.(1)求ρ与V 的函数关系式; (2)假设V =a (m 3), 18.19+=a ρ(kg/m 3), 求a 的值. 解:(1) 设k V ρ=, 把V =5, ρ=1.98代入, 得k =9.9, ∴9.9V ρ=. (2) 当V =a , 18.19+=a ρ时, 19.89.91a a=+, 解得a =1(m 3). 21. (此题6分) 某广告公司设计一幅周长为12米的矩形广告牌, 广告设计费为每平方米1000元, 设矩形的一边长为x 米, 面积为S .(1)求S 与x 之间的函数关系式, 并确定自变量x 的取值范围;(2)为使广告牌美观、大方, 要求做成黄金矩形(即矩形的宽与长之比是黄金分割数0.618), 请你诸出广告公司可获得的设计费是多少?(精确到元). 解:(1)S =x (6-x )= -x 2+6x (0<x <6).(2) 由题意, 得6-x =0.618x , 解得x ≈3.7083.BAO∴设计费=1000×3.7083×(6-3.7083)≈8498元. 22. (此题8分) 如图, 圆心角∠AOB =120°, 弦AB =23cm. (1) 求⊙O 的半径r ;(2) 求劣弧AB 的长(结果保存π).解:(1) 作OC ⊥AB 于C ,那么AC =12AB =3cm. ∵∠AOB =120°, OA=OB ∴∠A =30°.∴在Rt △AOC 中, r =OA =cos30AC =2cm.(2) 41803AB n l r ππ==cm. 23. (此题6分) 如图, △ABC 内接于⊙O , AD ⊥BC 于D , AE 是⊙O 的直径. 假设AB=6, AC =8, AE =11, 求AD 的长.解:连结CE , 那么∠E =∠B . ∵AE 是⊙O 的直径, ∴∠ACE =90°. 又∵AD ⊥BC , ∴∠ACE =∠ADB =90°. ∴△ACE ∽△ADB , ∴AE ACAB AD=, 即1186AD =, 解得AD =4811. 24. (此题8分) 如图,直线y=-x +20与x 轴、y 轴分别交于A 、B 两点,动点P 从A 点开始在线段AO 上以每秒3个长度单位的速度向原点O 运动. 动直线EF 从x 轴开始以每秒1个长度单位的速度向上平行移动〔即EF ∥x 轴〕,并且分别与y 轴、线段AB 交于E 、F 点. 连结FP ,设动点P 与动直线EF 同时出发,运动时间为t 秒. (1) 当t =1秒时,求梯形OPFE 的面积.(2) t 为何值时,梯形OPFE 的面积最大,最大面积是多少?(3) 设t 的值分别取t 1、t 2时(t 1≠t 2),所对应的三角形分别为△AF 1P 1和△AF 2P 2.试判断这两个三角形是否相似,请证明你的判断. 解:设梯形OPFE 的面积为S . (1) A (20,0),B (0,20) ∴OA=OB =20,∠A=∠B =45°..当t =1时,OE =1,AP =3,∴OP =17,EF=BE =19.(第23题)OEDACBAOB Ay OF ExP∴S =21(OP+EF )·OE =18. (2) OE =t ,AP =3t ,∴OP =20-3t ,EF=BE =20-t. ∴S =21(OP+EF )·OE =21(20-3t +20-t )·t =-2t 2+20t =-2(t -5)2+50. ∴当t =5 (在0<t <320范围内)时,S 最大值=50. (3) 作FD ⊥x 轴于D ,那么四边形OEFD 为矩形. ∴FD=OE =t ,AF=2FD =2t . 又AP =3t .当t=t 1时,AF 1=2t 1,AP 1=3t 1;当t=t 2时,AF 2=2t 2,AP 2=3t 2; ∴212121AP AP t t AF AF ==,又∠A =∠A ,∴△AF 1P 1∽△AF 2P 2. BAy OF ED xP。

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人教版英语精品资料期末综合检测一、单项选择(共15小题;共15分)1. --- How was dinner at Jane's house?--- It was great. I think Jane's mum is wonderful cook.A. a; theB. the; aC. the; theD. a; an2. --- Yesterday I lost my pencil sharpener. I couldn't find .--- Oh, it's a pity. You'd better buy this afternoon.A. it; itB. it; oneC. one; itD. one; one3. By the year 2015, all of China's museums will be free to enter. We visit any museumwithout paying.A. canB. needC. mustD. should4. The photo often makes him of his childhood.A. thinksB. thoughtC. to thinkD. think5. --- Which do you prefer, tea or coffee?--- I don't care. is fine.A. EitherB. NeitherC. BothD. All6. Allen wanted to know after it got out of the UFO.A. what is the alien doingB. what the alien would doC. where would the alien goD. where the alien is going7. --- You drive your car so fast. It's very dangerous.--- Sorry. I won't do that again.A. wouldn'tB. shouldn'tC. couldn'tD. mightn't8. --- How old is the man under the tree?--- I him to be about fifty.A. guessB. supposeC. understandD. know9. The blue skirt I bought yesterday cost me 80 yuan.A. thatB. whereC. whoD. when10. --- I think the man over there must be Bob.--- It be him. He has to Australia.A. can't; goneB. can't; beenC. may not; beenD. mustn't; gone11. --- I often have hamburgers for lunch.--- You'd better not. It's bad for you too much junk food.A. eatB. ateC. eatingD. to eat12. --- Look at the sign on the right.--- Oh, parking here.A. doesn't allowB. isn't allowedC. didn't allowedD. wasn't allowed13. ------ Yes. You can do it by yourself.A. Is it easy to make?B. What do you think of it?C. How can we start?D. He makes so many mistakes.14. Many students are willing to work hard to make their dreams true.A. comeB. cameC. comesD. coming15. --- I'm sorry to trouble you, Mr. Smith.--- .A. Fine, thank youB. All rightC. It doesn't matterD. It's very kind of you二、完形填空(共10小题;共15分)Every child has his own dream. Every child hopes to be an adult. 16 , is it really like what they imagine? As a boy 17 lives in modern times and in a modern city, I feel greater pressure(压力) on me with the city's development. Although we 18 worry about money, we still have 19 problems, such as competition among classmates and expectations from parents. These experiences are very 20 to our future. But in fact, they really give me a lot of pressure. I still clearly 21 the happiness of my childhood. 22 , we had to face the fact with time passing by. We began to feel this invisible(无形的) pressure come upon us. We 23 before sunrise and come back after sunset. We work and study like an adult, even harder. What we do is in order to 24 an excellent mark. Oh, growing up is completely boring, but we 25 try to find happiness while growing up. I think the friendship among our friends, the support from our parents and the encouragement from our teachers can help us. Why not enjoy the pleasure of growing up and its delicious taste?16. A. However B. And C. So D. Although17. A. which B. who C. whom D. whose18. A. always B. usually C. often D. seldom19. A. other B. another C. others D. the others20. A. helpful B. happy C. bad D. hard21. A. think B. remember C. forget D. find22. A. Luckily B. Unluckily C. Impossibly D. Fortunately23. A. get up B. put up C. set up D. give up24. A. become B. get C. buy D. show25. A. should B. shouldn't C. mustn't D. can't三、阅读理解(共5小题;共10分)When you learn English, you find it not clever to put an English sentence, word by word, into your own language. Take the sentence "How do you do?" as an example. If you look up each word in the dictionary, one at a time, what is your translation? It must be a wrong sentence in you own language.Languages do not just have different sounds: they are different in many ways. It's important to master(掌握) the rules for word order in the study of English, too. If the speaker puts the words in a wrong order, the listener can't understand the speaker's sentence easily. Sometimes when the order of words in an English sentence is changed, the meaning of the sentence changes. But sometimes when the order is changed, the meaning of the sentence doesn't change. Let's see the difference between the two pairs of sentences below."She only likes apples." "Only she likes apples.""I have seen the film already." "I have already seen the film."When you are learning English, you must do your best to get the spirit of the language and use it as the English speaker does.26. From the passage we know that when we are learning English, .A. we shouldn't put every word into our own languageB. we should look up every word in the dictionaryC. we need to put every word into our own languageD. we must read word by word27. The writer thinks it is in learning English.A. difficult to understand different soundsB. impossible to remember the word orderC. important to master the rules in different waysD. easy to master the rules for word order28. We can learn from the passage that .A. the meaning of an English sentence always changes with the order of words.B. the order of words can never change the meaning of an English sentenceC. sometimes a different order of words has a different meaningD. if the order of words is different, the meaning of the sentence must be different29. "She only likes apple" .A. is the same as "Only she likes apples"B. is different from "Only she likes apples"C. means "She likes fruit except apples"D. means "She doesn't like apples"30. Which is the best title for this passage?A. Different Orders, Different MeaningsB. How to Speak EnglishC. How to Put English into Our Own LanguageD. How to Learn English四、阅读与表达(判断式)(共5小题;共10分)Young people are often unhappy when they are with their parents. They say that their parents don't understand them. They often think their parents are too strict with them, and they are never given a free hand.Parents often find it difficult to win their children's trust and they seem to forget how they themselves felt when they were young.For example, young people like to do things without much thinking. It's one of their ways to show that they grow up and they can do with any difficult things. Older people worry more easily. Most of them plan things ahead and don't like their plans to be changed.When you want your parents to let you do something, you will have better success if you ask before you really start doing it.Young people often make their parents angry by clothes they want, the music they enjoy and something else. But they don't mean to cause any trouble. They just feel that in this way they can be cut off from the old people's world and they want to make a new culture of their own. And if their parents don't like their music or clothes or their manner of speech, the young people feel very unhappy. Sometimes you even don't want your parents to say, "Yes" to what you do. You want to stay at home alone and do what you like.If you plan to control your life, you'd better win your parents' trust and try to get them to understand you. If your parents see that you have a high sense of responsibility, they will certainly give you the right to do what you want to do.根据短文内容,判断正误,正确的为T,错误的为F。

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