九年级上学期期中复习综合练习(三)
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部编版九年级语文上册期中考试复习练习题(含答案)一、积累运用(26分)1、根据提示默写句子。
(10分)(1)金樽清酒斗十千,____________。
(李白《行路难(其一)》)(2)____________,万古惟留楚客悲。
(刘长卿《长沙过贾谊宅》)(3)苏轼在《水调歌头》中指出世上没有完美的事,用于安慰自己的语句:____________,____________,____________。
(4)《醉翁亭记》描写朝暮之景的句子是____________,____________。
(5)____________,天与云与山与水,上下一白。
(张岱《湖心亭看雪》)(6)登斯楼也,则有去国怀乡,____________,____________,感极而悲者矣。
(范仲淹《岳阳楼记》)2.阅读下面的文字,按要求作答。
(9分)近日,《星河一叶》等六部国产科学家主题电影在中国科技馆4D影院免费展①(yìng),使科学精神和科学家精神通过银幕绽放出夺目的光彩。
曾经,在资本的驱动和网络媒体的()之下,各种娱乐资讯充②(chì)媒体平台,娱乐明星和网红成为一些青少年争相追捧和()的对象。
在这种背景下,科学家主题电影将科学之星推介给观众,为帮助青少年形成正确的人生观和价值观,提供了一种寓教于乐的途径。
这些电影对特定历史背景的还原,为科学家不计功利、献身科研的()找到了强大的精神支③(chēng),在唤起观众的爱国之情与主人公达成情感共鸣的基础上,也鼓励观众把祖国命运与个人命运结合起来,更加成就壮美的人生。
(1)根据拼音,依次写出相应的汉字(正楷字或行楷字)。
(3分)①______②______③______(2)依次填入文中括号内的词语,全都恰当的一项是()(3分)A.推波助澜效法举动B.推波助澜效仿壮举C.煽风点火效法壮举D.煽风点火效仿举动(3)文中画横线的句子有语病,下列修改最恰当的一项是()(3分)A.也鼓励观众把祖国命运与个人命运结合起来,成就更加壮美的人生。
初中化学九年级上学期期中考试复习专题:03 常见实验室仪器及使用一、单选题1.下列图示实验操作中,正确的是()A. B. C. D.2.某同学用量筒量取液体时,将量筒放好,仰视量筒内液体凹液面的最低处,读数为30ml;倒出部分液体后,平视液体凹液面的最低处,读数为25ml,则实际倒出的液体体积为()A. 等于5mlB. 大于5mlC. 小于5mlD. 无法确定3.用托盘天平称量某物质,调零后,物质置于右盘,砝码置于左盘,当天平平衡后,砝码读数为9g游码读数为0.8g对此实验操作实事求是的评价的是()A. 此操作违反规定,无法确定被称量物的质量B. 此操作可确定被称量物的质量为9.2gC. 此操作可确定被称量物的质量为8.2 gD. 此操作可确定被称量物的质量为9g4.取3mL的液体,然后加热,需要的仪器有()①试管;②烧杯;③试管夹;④酒精灯;⑤蒸发皿;⑥铁架台(带铁圈);⑦石棉网;⑧滴管;⑨量筒A. ①③④⑦⑨B. ①③④⑧⑨C. ②④⑥⑧⑨D. ④⑤⑥⑦⑧⑨5.规范化学实验操作是实验成败的关键。
下列实验操作正确的是()A. 量取液体B. 检查装置气密性C. 蒸发结晶D. 给液体加热二、综合题6.(1)如图所示,把下列实验仪器的名称填在横线上。
①________②________③________④________⑤________⑥________(2)吸取或滴加少量的液体需要用________。
(填标号,下同)(3)能用来加热的仪器是________。
(4)量取8 mL的水,需要用________。
(5)把糖溶解到一定量的水中时,需要用________。
7.掌握化学实验中常用仪器的特征和用途,有利于开展化学学习和研究。
(1)请从下列常见仪器图示中,选择恰当的仪器名称....填空。
①可以直接在酒精灯火焰上加热的玻璃仪器是________;②用酒精灯加热时需要垫上石棉网的仪器是________;③取用粉末状固体药品用到的仪器是________;④吸取和滴加少量液体试剂的仪器是________ 。
九年级上册期中综合复习训练一.选择题1.如图,在矩形ABCD内放入六个小正方形后形成一个中心对称图形,其中顶点E、F分别在边BC、AD上,则长AD与宽AB的比为()A.6:5B.13:10C.8:7D.4:32.若a为方程x2+x﹣5=0的解,则a2+a+1的值为()A.12B.6C.9D.163.二次函数y=﹣2(x+1)2﹣4,下列说法正确的是()A.开口向上B.对称轴为直线x=1C.顶点坐标为(1,4)D.当x<﹣1时,y随x的增大而增大4.下列事件中,属于必然事件的是()A.三角形的外心到三边的距离相等B.某射击运动员射击一次,命中靶心C.任意画一个三角形,其内角和是180°D.抛一枚硬币,落地后正面朝上5.二次函数y=(x+1)2﹣2的图象大致是()A.B.C.D.6.如图:已知CD为⊙O的直径,过点D的弦DE∥OA,∠D=50°,则∠C的度数是()A.25°B.40°C.30°D.50°7.如图,在△ABC中,AB=10,AC=8,BC=6,经过点C且与边AB相切的动圆与CA,CB分别相交于点P,Q,则线段PQ的最小值()A.5B.4C.4.75D.4.88.阅读材料:设一元二次方程ax2+bx+c=0(a≠0)的两根为x1,x2,则两根与方程系数之间有如下关系:x1+x2=﹣,x1•x2=.根据该材料填空:已知x1,x2是方程x2+6x+3=0的两实数根,则+的值为()A.4B.6C.8D.109.如图,在平面直角坐标系中,⊙P与y轴相切,直线y=x被⊙P截得的弦AB长为,若点P 的坐标为(4,p),则p的值为()A.B.C.D.二.填空题10.在直角坐标系中,点(﹣2,3)关于原点中心对称的点的坐标是.11.用一个半径为10cm半圆纸片围成一个圆锥的侧面(接缝忽略不计),则该圆锥的高为.12.为落实“两免一补”政策,某市2011年投入教育经费2500万元,预计2013年要投入教育经费3600万元.已知2011年至2013年的教育经费投入以相同的百分率逐年增长,则2012年该市要投入的教育经费为万元.13.在一个不透明的袋中装有黑色和红色两种颜色的球共计15个,每个球除颜色外都相同,每次摇匀后随机摸出一个球,记下颜色后再放回袋中,通过大量重复摸球试验后,发现摸到黑球的频率稳定于0.6,则可估计这个袋中红球的个数约为.14.如图,AB是⊙O的直径,点C是⊙O上的一点,若BC=6,AB=10,OD⊥BC于点D,则OD 的长为.15.已知抛物线y=+1具有如下性质:该抛物线上任意一点到定点F(0,2)的距离与到x轴的距离始终相等,如图,点M的坐标为,P是抛物线y=+1上一个动点,则△PMF 周长的最小值是.三.解答题16.如图,在平面直角坐标系中,△ABC的顶点坐标分别为A(1,3),B(2,1),C(5,2).(1)将△ABC以原点O为旋转中心旋转180°得到△A1B1C1,画出旋转后的△A1B1C1.(2)平移△ABC,使点A的对应点A2坐标为(3,﹣3),画出平移后的△A2B2C2.(3)若将△A1B1C1绕某一点旋转可得到△A2B2C2,请直接写出旋转中心的坐标.17.如图⊙O中,AB、CD是两条直径,弦CE∥AB,弧EC的度数是40°,求∠BOD的度数.18.在一个不透明的口袋里装有分别标有数字﹣3、﹣1、0、2的四个小球,除数字不同外,小球没有任何区别,每次试验先搅拌均匀.(1)从中任取一球,将球上的数字记为a,则关于x的一元二次方程ax2﹣2ax+a+3=0有实数根的概率;(2)从中任取一球,将球上的数字作为点的横坐标,记为x(不放回);再任取一球,将球上的数字作为点的纵坐标,记为y,试用画树状图(或列表法)表示出点(x,y)所有可能出现的结果,并求点(x,y)落在第二象限内的概率.19.春节临近,由于我市城区执行严禁燃放烟花炮竹令,某商店发现了商机经销一种安全、无污染的电子鞭炮已知这种电子鞭炮的成本价每盒80元,市场调查发现春节期间,该种电子鞭炮每天的销售量y(盒)与销售单价x(元)有如下关系:y=﹣2x+320(80≤x≤160).设这种电子鞭炮每天的销售利润为w元.(1)求w与x的函数关系式;(2)该种电子鞭炮的销售单价定为多少元时,每天销售利润最大?最大利润是多少元?(3)若该商店销售这种电子鞭炮要想每天获得销售利润2400元,应如何定价?20.如图,在Rt△ABC中,∠ABC=90°,AC的垂直平分线分别与AC,BC及AB的延长线相交于点D,E,F,⊙O是△BEF的外接圆,∠EBF的平分线交EF于点G,交⊙O于点H,连接BD,FH.(1)试判断BD与⊙O的位置关系,并说明理由;(2)当AB=BE=1时,求⊙O的面积;(3)在(2)的条件下,求HG的长.21.如图,已知抛物线y=﹣x2+bx+c与一直线相交于A(﹣1,0),C(2,3)两点,与y轴交于点N.其顶点为D.(1)抛物线及直线AC的函数关系式;(2)若抛物线的对称轴与直线AC相交于点B,E为直线AC上的任意一点,过点E作EF∥BD 交抛物线于点F,以B,D,E,F为顶点的四边形能否为平行四边形?若能,求点E的坐标;若不能,请说明理由;(3)若P是抛物线上位于直线AC上方的一个动点,求△APC的面积的最大值.22.如图,二次函数y=x2+bx+c的图象交x轴于A、D两点,并经过B点,已知A点坐标是(2,0),B点的坐标是(8,6).(1)求二次函数的解析式.(2)求函数图象的顶点坐标及D 点的坐标.(3)该二次函数的对称轴交x 轴于C 点.连接BC ,并延长BC 交抛物线于E 点,连接BD ,DE ,求△BDE 的面积.(4)抛物线上有一个动点P ,与A ,D 两点构成△ADP ,是否存在S △ADP =S △BCD ?若存在,请求出P 点的坐标;若不存在.请说明理由.参考答案一.选择题1.解:连结EF,作IJ⊥LJ于J,∵在矩形ABCD内放入六个小正方形后形成一个中心对称图形,∴△HGF∽△FHE,△HGF≌△FML≌△LJI,∴HG:GF=FH:HE=1:2,∴长AD与宽AB的比为(1+2+1+2):(2+2+1)=6:5.故选:A.2.解:∵a为方程x2+x﹣5=0的解,∴a2+a﹣5=0,∴a2+a=5则a2+a+1=5+1=6.故选:B.3.解:∵二次函数y=﹣2(x+1)2﹣4,∴a=﹣2,该函数的图象开口向下,故选项A错误;对称轴是直线x=﹣1,故选项B错误;顶点坐标为(﹣1,﹣4),故选项C错误;当x<﹣1时,y随x的增大而增大,故选项D正确;故选:D.4.解:A、三角形的外心到三角形的三个顶点的距离相等,三角形的内心到三边的距离相等,只有三角形是等边三角形时才符合,故本选项不符合题意;B、某射击运动员射击一次,命中靶心是随机事件,故本选项不符合题意;C、三角形的内角和是180°,是必然事件,故本选项符合题意;D、抛一枚硬币,落地后正面朝上,是随机事件,故本选项不符合题意;故选:C.5.解:在y=(x+1)2﹣2中由a=1>0知抛物线的开口向上,故A错误;其对称轴为直线x=﹣1,在y轴的左侧,故B错误;由y=(x+1)2﹣2=x2+2x﹣1知抛物线与y轴的交点为(0,﹣1),在y轴的负半轴,故D错误;故选:C.6.解:∵DE∥OA,∠D=50°,∴∠AOD=∠D=50°,∴∠C=∠AOD=25°.故选:A.7.解:线段PQ长度的最小值时,PQ为圆的直径,如图,设QP的中点为F,圆F与AB的切点为D,连接FD、CF、CD,∵圆F与AB相切,∴FD⊥AB,∵AB=10,AC=8,BC=6,∴∠ACB=90°,FC+FD=PQ,∴CF+FD>CD,且PQ为圆F的直径,∵当点F在直角三角形ABC的斜边AB的高上CD时,PQ=CD有最小值,即CD为圆F的直径,=BC•CA=CD•AB,且S△ABC∴CD==4.8,即PQ的最小值为4.8,故选:D.8.解:∵x1,x2是方程x2+6x+3=0的两实数根,∴x1+x2=﹣=﹣6,x1•x2==3,则+====10.故选:D.9.解:如图,作PF⊥x轴于F,交AB于D,作PE⊥AB于E,连结PB,∵⊙P与y轴相切于点C,⊙P的半径是4,∴OF=4,把x=4代入y=x得y=4,∴D点坐标为(4,4),∴DF=4,∴△ODF为等腰直角三角形,∴△PED也为等腰直角三角形,∵PE⊥AB,∴AE=BE=AB=×4=2,在Rt△PBE中,PB=4,∴PE==2,∴PD=PE=2,∴PF=PD+DF=4+2,∴p=4+2,故选:B.二.填空题10.解:点(﹣2,3)关于原点中心对称的点的坐标是(2,﹣3).11.解:圆锥的侧面展开图的弧长为2π×10÷2=10π(cm),∴圆锥的底面半径为10π÷2π=5(cm),∴圆锥的高为:=5(cm).故答案是:5cm.12.解:根据题意2012年为2500(1+x),2013年为2500(1+x)(1+x).则2500(1+x)(1+x)=3600,解得x=0.2或x=﹣2.2(不合题意舍去).故这两年投入教育经费的平均增长率为20%,2012年该市要投入的教育经费为:2500(1+20%)=3000万元.故答案为:3000.13.解:15×(1﹣0.6)=15×0.4=6答:估计这个袋中红球的个数约为6.故答案为:6.14.解:∵OD⊥BC,∴BD=CD=BC=3,∵OB=AB=5,∴OD==4.故答案为4.15.解:过点M作ME⊥x轴于点E,ME与抛物线交于点P′,如图所示.∵点P′在抛物线上,∴P′F=P′E.又∵点到直线之间垂线段最短,MF==2,∴当点P运动到点P′时,△PMF周长取最小值,最小值为ME+MF=3+2=5.故答案为:5.三.解答题16.解:(1)如图所示,△A1B1C1即为所求.(2)如图所示,△A2B2C2即为所示.(3)如图所示,旋转中心坐标为P(1,﹣3).17.解:连接DE,∵DC是圆的直径,∴∠DEC=90°.∵弧EC的度数是40°,∴∠EDC=20°.∴∠ECD=70°.∵CE∥AB,∴∠AOD=∠ECD=70°.∴∠BOD=110°.18.解:(1)∵方程ax2﹣2ax+a+3=0有实数根,∴△=4a2﹣4a(a+3)=﹣12a≥0,且a≠0,解得a<0,∵从中任取一球,得a<0的概率是=,∴方程ax2﹣2ax+a+3=0有实数根的概率为.故答案为:.(2)列表如下:﹣3﹣102﹣3﹣(﹣1,﹣3)(0,﹣3)(2,﹣3)﹣1(﹣3,﹣1)﹣(0,﹣1)(2,﹣1)0(﹣3,0)(﹣1,0)﹣(2,0)2(﹣3,2)(﹣1,2)(0,2)﹣所有等可能的情况有12种,其中点(x,y)落在第二象限内的情况有(﹣1,2),(﹣3,2)2种,则点(x,y)落在第二象限内的概率==.19.解:(1)由题意得:w=(x﹣80)•y=(x﹣80)(﹣2x+320)=﹣2x2+480x﹣25600∴w与x的函数关系式为:w=﹣2x2+480x﹣25600;(2)w=﹣2x2+480x﹣25600=﹣2(x﹣120)2+3200∵﹣2<0,80≤x≤160∴当x=120时,w有最大值,w的最大值为3200元.(3)当w=2400时,﹣2(x﹣120)2+3200=2400解得:x1=100,x2=140∴要想每天获得销售利润2400元,应定价为100元或140元每盒.20.解:(1)BD与⊙O相切,理由:如图1,连接OB,∵OB=OF,∴∠OBF=∠OFB,∵∠ABC=90°,AD=CD,∴BD=CD,∠EBF=90°,∴∠C=∠DBC,EF为直径,∴点O在EF上,∵∠C=∠BFE,∴∠DBC=∠OBF,∵∠CBO+∠OBF=90°,∴∠DBC+∠CBO=90°,∴∠DBO=90°,∴BD与⊙O相切;(2)如图2,连接CF,HE,∵∠CDE=90°,∠ABC=90°,∴∠DEC=∠A,∵∠CED=∠FEB,∴∠FEB=∠A.∵AB=BE,∠ABC=∠CBF=90°,∴△ABC≌△EBF(ASA),∵BC=BF,∴CF=BF,∵DF垂直平分AC,∴AF=CF=AB+BF=1+BF=BF,∴BF=+1,∴EF==,∵∠CBF=90°,∴EF是⊙O的直径,∴⊙O的面积=(EF)2•π=π=π;(3)∵AB=BE,∠ABE=90°,∴∠AEB=45°,∵EA=EC,∴∠C=22.5°,∴∠H=∠BEG=∠CED=90°﹣22.5°=67.5°,∵BH平分∠CBF,∴∠EBG=∠HBF=45°,∴∠BGE=∠BFH=67.5°,∴BG=BE=1,BH=BF=1+,∴HG=BH﹣BG=.21.解:(1)由抛物线y=﹣x2+bx+c过点A(﹣1,0)及C(2,3)得,,解得,故抛物线为y=﹣x2+2x+3;又设直线为y=kx+n过点A(﹣1,0)及C(2,3),得,解得,故直线AC为y=x+1;(2)∵y=﹣x2+2x+3=﹣(x﹣1)2+4,∴D(1,4),当x=1时,y=x+1=2,∴B(1,2),∵点E在直线AC上,设E(x,x+1).①如图2,当点E在线段AC上时,点F在点E上方,则F(x,x+3),∵F在抛物线上,∴x+3=﹣x2+2x+3,解得,x=0或x=1(舍去),∴E(0,1);②当点E在线段AC(或CA)延长线上时,点F在点E下方,则F(x,x﹣1),∵F在抛物线上,∴x﹣1=﹣x2+2x+3,解得x=或x=,∴E(,)或(,),综上,满足条件的点E的坐标为(0,1)或(,)或(,);(3)方法一:如图3,过点P作PQ⊥x轴交AC于点Q,交x轴于点H;过点C作CG⊥x轴于点G,设Q(x,x+1),则P(x,﹣x2+2x+3)∴PQ =(﹣x 2+2x +3)﹣(x +1)=﹣x 2+x +2又∵S △APC =S △APQ +S △CPQ=PQ •AG=(﹣x 2+x +2)×3=﹣(x ﹣)2+,∴面积的最大值为;方法二:过点P 作PQ ⊥x 轴交AC 于点Q ,交x 轴于点H ;过点C 作CG ⊥x 轴于点G ,如图3,设Q (x ,x +1),则P (x ,﹣x 2+2x +3)又∵S △APC =S △APH +S 直角梯形PHGC ﹣S △AGC=(x +1)(﹣x 2+2x +3)+(﹣x 2+2x +3+3)(2﹣x )﹣×3×3=﹣x 2+x +3=﹣(x ﹣)2+,∴△APC 的面积的最大值为.22.解:(1)∵二次函数y=x2+bx+c的图象过A(2,0),B(8,6)∴,解得∴二次函数解析式为:y=x2﹣4x+6,(2)由y=x2﹣4x+6,得y=(x﹣4)2﹣2,∴函数图象的顶点坐标为(4,﹣2),∵点A,D是y=x2+bx+c与x轴的两个交点,又∵点A(2,0),对称轴为x=4,∴点D的坐标为(6,0).(3)∵二次函数的对称轴交x轴于C点.∴C点的坐标为(4,0)∵B(8,6),设BC所在的直线解析式为y=kx+b′,∴,解得,∴BC所在的直线解析式为y=x﹣6,∵E点是y=x﹣6与y=x2﹣4x+6的交点,∴x ﹣6=x 2﹣4x +6解得x 1=3,x 2=8(舍去),当x =3时,y =﹣,∴E (3,﹣),∴△BDE 的面积=△CDB 的面积+△CDE 的面积=×2×6+×2×=7.5.(4)存在,设点P 到x 轴的距离为h ,∵S △BCD =×2×6=6,S △ADP =×4×h =2h∵S △ADP =S △BCD∴2h =6×,解得h =,当P 在x 轴上方时,=x 2﹣4x +6,解得x 1=4+,x 2=4﹣,当P 在x 轴下方时,﹣=x 2﹣4x +6,解得x 1=3,x 2=5, ∴P 1(4+,),P 2(4﹣,),P 3(3,﹣),P 4(5,﹣).。
福建省福州市2024-2025学年九年级上学期人教版数学期中复习试卷(3)一、单选题1.下列汽车商标设计中,既是轴对称图形,又是中心对称图形的是()A .B .C .D .2.一元二次方程()2200,40ax bx c a b ac ++=≠-≥的求根公式是()A .x =B .x =C .42b x a-=D .42b x a=3.如图,点C 在以AB 为直径的O 上,且70BOC ∠=︒,则C ∠=()A .70︒B .35︒C .45︒D .30︒4.抛物线()2221y x =-+-的顶点坐标是()A .()2,1--B .2,−1C .()2,2-D .()2,2-5.如图,若正六边形ABCDEF 绕着中心点O 旋转α度后得到的图形与原来图形重合,则α的最小值为()A .1 20B . 90C . 45D . 606.用配方法解一元二次方程2450x x +-=,此方程可变形为()A .2(2)9x +=B .2(2)9x -=C .2(2)1x +=D .2(2)1x -=7.若123135(,)(1,)(,)43A yB yC y --、、为二次函数y=-x 2-4x+5的图象上的三点,则y 1、y 2、y 3的大小关系是()A .y 1<y 2<y 3B .y 3<y 2<y 1C .y 3<y 1<y 2D .y 2<y 1<y 38.某商品经过两次降价,销售单价由原来100元降到64元,则平均每次降价的百分率为()A .10%B .20%C .36%D .8%9.如图,点P 是等边ABC V 内一点,且1PA PB =,2PC =,则APB ∠的大小为()A .120︒B .130︒C .135︒D .150︒10.飞机着陆后滑行的距离()m s 关于滑行的时间的函数解析式为260 1.5s t t =-,下列能反映这一变化过程的图象是()A .B .C .D .二、填空题11.方程()20x x +=的根是.12.若=1x -是方程220x mx -+=的一个根,则m =.13.如图,A ,B ,C 是O 上的三个点,若四边形ABCO 为菱形,则B ∠=.14.抛物线22y ax ax c =-+经过点()3,0,则关于x 的一元二次方程220ax ax c -+=的另一个根是.15.若235a a =+,235b b =+,则22a b +的值等于.16.如图,点E 是矩形ABCD 的中点,点F 为BC 上一点,将BEF △沿EF 折叠得到PEF !,连接PD ,若46AB BC ==,,则PD 的最小值为.三、解答题17.解方程∶2410x x --=18.如图,AB CD ,是O 的两条弦,且AB CD OM AB =⊥,于M ,ON CD ⊥于N .求证:OM ON =.19.求证:关于x 的一元二次方程22330x x m m --+=一定有实数根.20.已知二次函数224y x x =-.(1)求它的开口方向、对称轴和顶点坐标.(2)判断点()1,6A -是否在此二次函数的图象上.21.如图,ABC 绕点A 逆时针旋转120︒得到ADE ,点C 的对应点为E .(1)尺规作图,画出旋转后的ADE .(保留痕迹,不写作法)(2)设直线BC 与D 相交于P ,求CPD ∠的大小.22.如图,AB 为O 的直径,点C ,D 为圆上两点, CDBC =,且有AC 平分BAD ∠,过C 作CE AD ⊥于E .(1)求证:CE 为O 的切线(2)若4CD CE ==,,求O 半径.23.已知实数a ,b ,c .(1)若>0,1c =-,0a b c -+=,求a b c ++的取值范围.(2)若a ,b ,c 都是整数,且a b c ++是偶数.求证:a b c +-,b c a +-,a c b +-都是偶数.24.如图,Rt ABC △中,90306C A AB ∠=︒∠=︒=,,,点D 在AB 上,DE BC ⊥于E ,DF AC ⊥于F ,连接EF .(1)求EF 的最小值.(2)要使四边形DECF 的面积最大,点D 应选在何处?25.已知抛物线2y ax bx c =++()0a >,顶点为()00,.(1)求b ,c 的值.(2)若1a =时,如图1,P 为y 轴右侧抛物线上一动点,过P 作直线PN x ⊥轴于点N ,交直线l :122y x =+于M 点,设P 点的横坐标为m ,当2PM PN =时,求m 的值.(3)若1a =时,如图2,直线2y nx =+与抛物线相交于A ,B ,当AB =时,求ABO S ∆的面积.。
C. whatto do B. gone to; excitingD. gone to; excited ? ____ Sorry, IB. When the trainD. The trainC. use to beC. How aB.you look; D. I looked;九年级上期中复习练习(三)(选择、时态、语态和直接引语和间接引语部分内容) 一.、选择填空。
( )1. It's not polite to speak in public. A. loud B. loudly C. louder D.loudlier( )2.1 haven't seen the movie and my brother hasn't,. A. too B. either C. alreadyD. yet( )3.should not be allowed to go out at night. A. Twelve-years-old B. Twelve-year-olds C. Twelve year old D. Twelve years olds( )4.--- They have a lot of rules at their house.— _ A. so do I B. So we do C. So have I D. So I have ( )5.1 don't know.A. what to do itB. how to do it D. to do what )6. This question is easy, all the students can answer the question.A. too muchB. too manymuch too D. many to( )7.1 have ever the Great Wall twice. It is an place. A. been to; excited C. been to; exciting ()8 ------- Could you tell me don't know.A. When does the train arrive arrives C. When arrives the train when arrives ()9. He be a history teacher.A. used toB. be used to D. be use to()10.lovely weather it is!A. WhatB. What aD. How( )11.Jack said to me: "You look worriedtoday." Jack told me thatworried.A. he looks; today todayC. we looked; that day day ()12. He is too tired any longer.A. not to walkB. to walkC. walkingD. not walking( )13. ____ h e was tired , he still went on with his homework .A. BecauseB. ThoughC. SinceD. As( )14.——Have you spoken to an Englishman?——No, I've ______ met a foreigner.A. ever; everB. never; neverC. ever; neverD. never, ever( )15. It is hard the work today .A. to finishB. finishedC.finishesD. finish二、延续性动词和非延续性动词专练(一)选择题1. When Henry arrived at the bus stop, the bus ______A. has leftB. had leftD. had been away2.1 the League for five years so far. —for two hours.C. has been awayA. joinedD. join3. The factoryB. have joinedsince the February of 1995.C. have been inA. has been openD. openedB. has openedC. was open4. Mary and Rose ___ friends since they met in London in 1998.A. have madeB. have beenC. madeD. have become5. You mustn't until he comes back.A. be awayB. leaveC. be leftD. have been6. The meeting for a week now.A. has finishedB. has endedC. has been overD. has been in7. Miss Gao ____ —this school since 1996.A. has come toB. came toC. has teachedD. hasbeen in8. Ben ______ a teacher for nearly three years.A. has beenB. has becomeC. wasD.became9. I ______ h ome for a week up to now.A. have returnedB. have been backC. returnedD. were10.How long Mr. Smith?C. was; dyingC. arriveA. did; dieB. was; deadD. has; been dead11. When I in Beijing, it was raining hard. A. got B. reachedD. was12. Tom _____ A. has had D. had got 13. -How_ the car for twomonths. B.bought-Two weeks.C. has boughtA. did; all illB. have; fallen ill14. Since 1942 he — his hometown. A.has leftC. has been away fromC. were; illD. have; been illB. has moved away from D. moved away from15. I'll lend you the bike, but you can only it for two days. A. borrow B, lendC. keepD. take16. The bus on the road for an hour. A. has stopped B. stopped C. is stopping D.has been17. Are you the jacket these days? A. wearing B. putting onC. dressingD. pulling on (二)句型转换1. He left here yesterday. He here yesterday.2.1 borrowed this book two days ago. I this book .3. His grandpa died last week. His grandpa last week.4. The film began at 6 o'clock. Now it is 7 o'clock. The film an hour.5. His brother joined the army in September 2004. His brother the army September 2004.6. We got to know each other the day before yesterday. We each other the day before yesterday.7. They got to England four months ago. They England four months ago.8.1 caught a cold three days ago. I a cold .9. They arrived there three minutes ago. They there three minutes ago. 10. His mother fell ill last Sunday. His mother last Sunday. 二、被动语态专项训练(一)选择题1. ____ a new library ______ in our school last year?A. Is; builtB. Was; builtDoes; build D. Did; build2.An accident ____ on this road last week.C.A. has been happenedB. was happenedD. happened3.Cotton ____ in the southeast of China.C. is happenedA. is grown B, are grownD. grow4.So far, the moon ____ by man already. C. growsA. is visitedB. will be visitedbeen visited D. was visited5.A talk on Chinese history _ in the school hall next week.C. hasA. is givenB. has been givenbe given D. gives6.How many trees ____ this year?C. willA. are planted B, will plantplanted D. planted7.A lot of things ____ by people to save the little girl now.C. have beenA. are doingB. are being donebeen done D. will be done8.Neither of them _______ i n China.C. hasA. is madeB. are made made D. made9.Look! A nice picture _____ f or our teacher. C. wereA. is drawingB. is being drawnD. draws10. Your shoes ___ . You need a new pair.C. has been drawnA. wear outB. worn outworn out D. is worn11.Our teacher ______ carefully.C. areA. should be listened toB. should be listenD. is listened12.The monkey was seen ______ off the tree.C. be listenedA. jumpB. jumpsD. to jump13.The Great Wall ____ all over the world.C jumpedA. knowsB. newknown D. was known14.He says that Mr. Zhang ______ to the factory next week.C. isA. is sentB. would sendC. was sentD. will be sent15.Who this book?A. did; writtenB. was; written byC. did; writtenD. was; written16.Mary show me her new dictionary.A. has asked toB. was asked to C .is askedD. asks to17. A story by Granny yesterday.A. was told usB. was told to usC. is told usD. told us(二)把下列句子改写成被动语态1.We can finish the work in two days.The work ____________________________ in two days.2.They produce silk in SuzhouSilk in Suzhou.3.The children will sing an English song.An English song by the children.4.You needn't do it now.It by you now.5.Lucy sent me a New Year Card last week.A New Year Card her by me last week.6.People use metal for making machines.Metal for making machines.7.He made me do that for him.I that for him.8.1have given this book to the library.This book to the library.9.Did they build a bridge here a year ago?a bridge here by them a year ago?10.We must water the flowers every day.The flowers must (by us) every day.11.They have sold out the light green dresses.The light green dresses out.12.We clean the classroom every day.The classroom every day.13.You must not plant trees in very dry earth.Trees in very dry earth.(三)用所给动词的适当形式填空1.Vegetables, eggs and fruits(sell) in this shop.2.What a knife (make) of?It(make) of metal and wood.3. A Piano concert(give) here last Friday.4.the magazine(can take) out of the library?5.The stars(can not see) in the daytime.6.Some flowers(water) by Li Ming already.7.These kinds of machines(make) in Japan.8.Apples (grow) on this farm.9.Russian(learn)as the second language by some students in China.10.Planes, cars and trains(use) by business people for traveling.11.The cinema(build) in 1985.12.The bike(must not put) here.13. A beautiful horse (draw) by John next day.14.This kind of machine(can made) by uncle Wang.四、现在完成时专练1.He just( copy ) all the new words.2.The librarian( work) in the library for three years.3.1never( see ) such a good film before.4.you ever(be ) to Beijing?5.The little girl(learn ) about 100 songs so far.6.He in U.S.A for 20 years, (live)7.Mr. Green is an engineer. He (work) in China for about two years.8.1(return) the book to the library already.9.The Smiths China for three years. ( be )10.He(teach ) English since he came here.11.Kate's never seen Chinese films, ?(改为反意疑问句)12.---Ann has gone to Shanghai. ---So her parents.A. hasB. hadC. didD. have13.1 a letter from him since he left. ( get)14.How many songs they by now? (learn)15.Recently Mary( do ) her work regularly.16.She(learn ) about 30,000 words in the past three years五、用动词的正确语态填空。
第一学期期中测试卷九年级·语文上(R版)时间:120分钟满分:120分一、积累与运用(34分)1.阅读下面的文字,按要求答题。
(5分)在人生的旅途中,能最终领略美妙风景的必然是有着强烈登临渴望并为之不懈bá shè的追寻者。
是心灵的渴望,开阔了求索的视野;是心灵的飞翔,摧动了奋进的脚步;是心灵的富有,________________________________。
人有了脊.梁骨,才能直立行走,人有了理想信念,才能让心灵辉煌起来,成为一个堂堂正正的人。
(1)根据拼音写词语,给加点的字注音。
(2分)bá shè()脊.梁骨()(2)文段中画波浪线的句子中有一个错别字,请你找出来并改正。
(1分)____________改为____________(3)根据语境,在文段中的横线上填上合适的内容。
(2分)2.下列句子中的加点成语使用有误的一项是()(3分)A.经过装修,布达拉宫显得富丽堂皇....,高雅精致。
B.那些粗俗不堪的人在有教养的人面前自惭形秽....。
C.新茶配上清纯的山泉,果然相得益彰....,不同凡响。
D.爸爸开了一家咖啡馆,很喜欢矫揉造作....,所以生意很好。
3.下面各句中,标点符号使用规范正确的一项是()(3分)A.“在考场上千万别慌,”老师再三叮嘱说:“做题前一定要看清题目要求,答案要完整。
”B.我们吟诵着毛泽东的《沁园春·雪》,怎能不激起心中的豪迈之情?将自己火红的青春投入到实现民族复兴的“中国梦”中去呢?C.麻城的杜鹃花海,织就了大地斑斓的锦幛,黄梅的戏曲,婉转了世间动人的情感,武穴的酥糖,甜蜜了心头美丽的梦想。
D.过去、现在、未来,上下、左右,中国、外国,都是互相联系、互相影响、互相制约的。
4.下列句子中没有语病的一项是()(3分)A.只有守住底线,相关互联网企业就能把握好科技创新的风口,站在社会发展的潮头。
B.央视推出的《朗读者》《国家宝藏》《经典咏流传》以及《信·中国》等大型文化综艺节目,均获得不错反响。
苏科版2019-2020九年级数学第一学期期中综合复习基础训练3(附答案)1.下列说法:①如果a 2>b 2,那么a>b ;4;③过一点有且只有一条直线与已知直线平行;④关于x 的方程2210mx x ++=没有实数根,那么m 的取值范围是m>1且m≠0;正确的有( )A .0个B .1个C .2个D .3个2.如图,如果从半径为9cm 的圆形纸片剪去圆周的一个扇形,将留下的扇形围成一个圆锥(接缝处不重叠),那么这个圆锥的底面半径为( )A .6cmB .3cmC .5cm D .3cm 3.如图,AB 是O 的直径,120BOD =∠,点C 为BD 的中点,AC 交OD 于点E ,1DE =,则AE 的长为( )A B C .D .4.若关于x 的一元二次方程mx 2﹣2x +1=0有两个实数根,则实数m 的取值范围是( )A .m ≤1B .m ≤﹣1C .m ≤1且m ≠0D .m ≥1且m ≠0 5.下列说法正确的是( )A .一个游戏中奖的概率是1100,则做100次这样的游戏一定会中奖 B .为了了解全国中学生的心理健康状况,应采用普查的方式C .一组数据0,1,2,1,1的众数和中位数都是1D .若甲组数据的方差为2s 甲,乙组数据的方差为2s 乙,则乙组数据比甲组数据稳定6.某型号的手机连续两次降阶,每台手机售价由原来的1185元降到580元,设平均每次降价的百分率为,则列出方程正确的是( )A .580(1+x)2=1185B .1185(1-x)2=580C.580(1-x)2=1185 D.1185(1+x)2=5807.如图,将半径为2的圆形纸片折叠后,圆弧恰好经过圆心O,则折痕AB的长度为()A B.2 C.D.(1+8.一组数据2,3,5,4,5的众数是()A.2 B.3 C.4 D.59.如图,已知⊙O的半径为5,点A到圆心O的距离为3,则过点A的所有弦中,最短弦的长为( )A.4 B.6 C.8 D.1010.通过测试从9位书法兴趣小组的同学中,择优挑选5位去参加中学生书法表演,若测试结果每位同学的成绩各不相同.则被选中同学的成绩,肯定不少于这9位同学测试成绩统计量中的()A.平均数B.众数C.中位数D.方差11.在如图所示的电路图中,在开关全部断开的情况下,闭合其中任意一个开关,灯泡发亮的概率是______.12.如图,AC⊥BC,AC=BC=4,以BC为直径作半圆,圆心为O.以点C为圆心,BC为半径作弧AB,过点O作AC的平行线交两弧于点D、E,则阴影部分的面积是_____.13.一组数据2,4,5,,1的平均数为,那么这组数据的方差是___.14.关于x 的方程x 2+2(m ﹣1)x ﹣4m =0的两个实数根分别是x 1,x 2,且x 1﹣x 2=2,则m 的值是_____.15.已知圆锥的母线长为5cm ,侧面积为15π2cm ,则这个圆锥的底面圆半径为_____cm.16.已知a ,b 是方程x 2+2017x +2=0的两个根,则(2+2019a +a 2)(2+2019b +b 2)的值为______.17.如图,四边形ABCD 为⊙O 的内接四边形,点E 在DA 的延长线上,已知∠BCD=110°,则∠BAE =_______°.18.已知O 的半径为4cm ,点P 在直线l 上,且点P 到圆心O 的距离为4cm ,则直线l 与O ______.19.如图,△ABC 中,AB =8,BC =10,AC =7,∠ABC 和∠ACB 的平分线交于点 I ,IE ⊥BC 于E ,则 BE 的长为________.20.一元二次方程290x x +=的解是______.21.如图,已知Rt △ABC 中,∠ACB=90°,以AC 为直径的圆O 交斜边AB 于D .过D 作DE ⊥AC 于E ,将△ADE 沿直线AB 翻折得到△ADF .(1)求证:DF 是⊙O 的切线;(2)若⊙O 的半径为10,sin ∠FAD=35,延长FD 交BC 于G ,求BG 的长.22.已知:关于x 的方程()222120x m x m -+++=. ()1若方程总有两个实数根,求m 的取值范围;()2在(1)的条件下,若两实数根1x 、2x 满足1212x x x x +=,求m 的值.23.每年夏季全国各地总有未成年人因溺水而丧失生命,令人痛心疾首.今年某校为确保学生安全,开展了“远离溺水·珍爱生命”的防溺水安全知识竞赛.现从该校七、八年级中各随机抽取10名学生的竞赛成绩(百分制)进行整理、描述和分析(成绩得分用x表示,共分成四组:A.80≤x≤85,B.85≤x≤90,C.90≤x≤95,D.95≤x≤100),下面给出了部分信息:七年级10名学生的竞赛成绩是:90,80,90,86,99,96,96,100,89,82八年级10名学生的竞赛成绩在C组中的数据是:94,90,94根据以上信息,解答下列问题:(1)直接写出上述图表中a,b,c的值;(2)根据以上数据,你认为该校七、八年级中哪个年级学生掌握防溺水安全知识较好?请说明理由(一条理由即可);(3)该校七、八年级共730人参加了此次竞赛活动,估计参加此次竞赛活动成绩优秀(x≧90)的学生人数是多少?24.已知ABC,()1用无刻度的直尺和圆规作ABD,使A D B A C B.∠∠=且ABD的面积为ABC 面积的一半,只需要画出一个ABD即可(作图不必写作法,但要保留作图痕迹) ()2在ABC中,若ACB45∠=,AB4=,则ABC面积的最大值是______25.足球训练场上,教练在球门前画了一个圆圈进行无人防守的射门训练.如图,甲、乙两名运动员分别在C,D两处,他们争论不休,都说自己所在的位置对球门AB的张角大,如果你是教练,请评一评他们两个人谁的位置对球门AB的张角大?为什么?26.如图①,四边形ABCD 与四边形CEFG 都是矩形,点E ,G 分别在边CD ,CB 上,点F 在AC 上,AB =3,BC =4(1)求AF BG的值; (2)把矩形CEFG 绕点C 顺时针旋转到图②的位置,P 为AF ,BG 的交点,连接CP (Ⅰ)求AF BG 的值; (Ⅱ)判断CP 与AF 的位置关系,并说明理由.27.解下列方程(1)x 2+12x +27=0(2)3x 2-2=5x28.如图1,四边形ADBC 内接于O ,AB 为O 的直径,对角线AB 、CD 相交于点E .图1 图2图3(1)求证:90BCD ABD ∠+∠=︒;(2)如图2,点G 在AC 的延长线上,连接BG ,交O 于点Q ,CA CB =,ABD ABG ∠=∠,作GH CD ⊥,交DC 的延长线于点H ,求证:GQ = (3)如图3,在(2)的条件下,过点B 作//BF AD ,交CD 于点F ,3GH CH =,若CF =O 的半径.参考答案1.A【解析】【分析】①当a是负数且绝对值大于b(正数)时,不成立;②4,再求其算术平方根即可;③当点在直线上时,没有与已知直线平等的直线;④根据一元二次方程根的判别式进行判断.【详解】①当a=-5时,b=2时,a2>b2,a<b,故①错误;=4,故其算术平方根为2,故②错误;③当点在直线上时,没有与已知直线平行的直线,正确说法是:过直线外一点有且只有一条直线与已知直线平行,故③错误;④关于x的方程mx2+2x+1=0没有实数根,那么m的取值范围是m>1,故此选项错误.所以正确的有0个.故选:A.【点睛】考查了算术平方根的定义、一元二次方程根的判别式等知识,正确把握相关性质是解题关键.2.A【解析】【分析】设圆锥的底面圆半径为r,先利用圆的周长公式计算出剩下的扇形的弧长,然后把它作为圆锥的底面圆的周长进行计算即可.【详解】设圆锥的底面圆半径为r,∵半径为9cm的圆形纸片剪去一个圆周的扇形,∴剩下的扇形的弧长=×2π×9=12π,∴2πr=12π,∴r=6.【点睛】本题考查了圆锥的有关计算:圆锥的侧面展开图为扇形,圆锥的底面圆的周长等于扇形的弧长.也考查了圆的周长公式.3.A【解析】【分析】连接OC ,证明OD ⊥AC 即可解决问题.【详解】解:连接OC ,∵弧CD=弧BC ,∴60DOC BOC ∠=∠=︒,60AOD ∠=︒,∴AOD DOC ∠=∠,∴弧AD=弧CD ,∴OD AC ⊥,90AEO ∠=︒,设AO r =,则1OE r =-,∵·cos60OE AO =︒, ∴112r r -=,2r =,∴AE =故选:A.【点睛】本题考查圆周角定理,垂径定理,解直角三角形等知识,解题的关键是学会添加常用辅助线,灵活运用所学知识解决问题,属于中考常考题型.4.C【解析】利用一元二次方程的定义和判别式的意义得到m≠0且△=(﹣2)2﹣4m≥0,然后求出两不等式的公共部分即可.【详解】根据题意得m≠0且△=(﹣2)2﹣4m≥0,解得m≤1且m≠0.故选:C.【点睛】本题考查了根的判别式:一元二次方程ax2+bx+c=0(a≠0)的根与△=b2﹣4ac有如下关系:当△>0时,方程有两个不相等的实数根;当△=0时,方程有两个相等的两个实数根;当△<0时,方程无实数根.5.C【解析】【分析】根据调查方式,可判断A,根据概率的意义一,可判断B根据中位数、众数,可判断c,根据方差的性质,可判断D.【详解】A、一个游戏中奖的概率是1100,做100次这样的游戏有可能中奖,而不是一定中奖,故A错误;B、为了了解全国中学生的心理健康状况,应采用抽查方式,故B错误;C、一组数据0,1,2,1,1的众数和中位数都是1,故C正确;D. 若甲组数据的方差为2s甲,乙组数据的方差为2s乙,无法比较甲乙两组的方差,故无法确定那组数据更加稳定,故D错误.故选:C.【点睛】本题考查了概率、抽样调查及普查、中位数及众数、方差等,熟练的掌握各知识点的概念及计算方法是关键.6.B【解析】根据降价后的价格=原价(1-降低的百分率),本题可先用x表示第一次降价后商品的售价,再根据题意表示第二次降价后的售价,即可列出方程.【详解】设平均每次降价的百分率为x,由题意得出方程为:1185(1−x)2=580.故选:B.【点睛】本题考查的是由实际问题列出一元二次方程,正确列出方程是解题的关键.7.C【解析】【分析】过O作OC⊥AB,交圆O于点D,连接OA,由垂径定理得到C为AB的中点,再由折叠得到CD=OC,求出OC的长,在直角三角形AOC中,利用勾股定理求出AC的长,即可确定出AB的长.【详解】过O作OC⊥AB,交圆O于点D,连接OA,由折叠得到CD=OC=12OD=1cm,在Rt△AOC中,根据勾股定理得:AC2+OC2=OA2,即AC2+1=4,解得:,则.故选C.【点睛】此题考查了垂径定理,勾股定理,以及翻折的性质,熟练掌握垂径定理是解本题的关键.8.D【解析】【分析】根据众数的定义:一组数据中出现次数最多的数据即可得出答案.【详解】解:这组数据中出现次数最多的数据为:5.故众数为5,故选:D.【点睛】本题考查了众数的知识,属于基础题,解答本题的关键是熟练掌握一组数据中出现次数最多的数据叫做众数.9.C【解析】【分析】最短弦是过A点垂直于OA的弦.根据垂径定理和勾股定理求解.【详解】由垂径定理得,该弦应该是以OA为中垂线的弦BC.连接OB.已知OB=5,OA=3,由勾股定理得AB=4.所以弦BC=8.故选C.【点睛】此题主要考查了学生对垂径定理及勾股定理的理解运用.10.C【解析】【分析】由于从9个人中挑选5位,则应根据中位数的意义进行解答.【详解】∵从9位书法兴趣小组的同学中,择优挑选5位去参加中学生书法表演,∴则被选中同学的成绩,肯定不少于这9位同学测试成绩统计量中的中位数,故选C .【点睛】本题考查了统计的相关知识,涉及了平均数、中位数、众数、方差等,要结合具体的问题对统计量进行合理的选择和恰当的运用.11.13【解析】【分析】根据概率公式知,共有3个开关,只闭一个开关时,只有闭合S 3时才发光,所以小灯泡发光的概率等于1.3【详解】根据题意,三个开关,只有闭合3S 小灯泡才发光,所以小灯泡发光的概率等于13. 故答案为:13【点睛】考查概率的计算,明确概率的意义是解题的关键,概率等于所求情况数与总情况数的比.12.53π﹣ 【解析】【分析】如图,图中S 阴影=S 扇形BCE ﹣S 扇形BOD ﹣S △OCE .根据已知条件易求得OB =OC =OD =2,BC=CE =4.∠ECB=60°,∠OEC=30°,所以由扇形面积公式、三角形面积公式进行解答即可 【详解】解:如图,连接CE .∵AC ⊥BC ,AC =BC =4,以BC 为直径作半圆,圆心为点O ;以点C 为圆心,BC 为半径作弧AB ,∴∠ACB =90°,OB =OC =OD =2,BC =CE =4.又∵OE ∥AC ,∴∠ACB =∠COE =90°.∴在直角△OEC 中,OC =2,CE =4,∴∠CEO =30°,∠ECB =60°,OE =∴S 阴影=S 扇形BCE ﹣S 扇形BOD ﹣S △OCE =2604360 π ﹣14 π×22﹣12×2×=53π﹣,故答案为:53π﹣【点睛】此题考查扇形面积的计算,掌握运算法则是解题关键13.2【解析】【分析】根据平均数的计算方法求得a 的值,再利用方差公式计算这组数据的方差即可.【详解】∵数据2,4,5,a ,1的平均数为a , ∴(2 +4+5+a+1)=a ,∴a=3,∴s 2=[(2-3)2+(4-3)2+(5-3)2+(3-3)2+(1-3)2]=2.故答案为:2.【点睛】本题考查了平均数及方差的计算公式,熟知平均数及方差的计算公式是解决问题的关键. 14.m =0或m =﹣2.【解析】【分析】由韦达定理得出x 1+x 2=﹣2(m ﹣1),x 1x 2=﹣4m ,结合x 1﹣x 2=2知122x m x m =-+⎧⎨=-⎩,代入x 1x 2=﹣4m 可得关于m 的方程,解之可得答案.【详解】解:∵关于x 的方程x 2+2(m ﹣1)x ﹣4m =0的两个实数根分别是x 1,x 2,∴x 1+x 2=﹣2(m ﹣1),x 1x 2=﹣4m ,又∵x 1﹣x 2=2,∴1212222x x m x x +=-+⎧⎨-=⎩, 解得:122x m x m =-+⎧⎨=-⎩, 代入x 1x 2=﹣4m 得﹣m (﹣m+2)=﹣4m ,解得:m =0或m =﹣2,故答案为:m =0或m =﹣2.【点睛】本题主要考查一元二次方程根与系数的关系,根据韦达定理及x 1﹣x 2=2得出关于m 的方程是解题的关键.15.3【解析】【分析】根据圆锥的侧面积和圆锥的母线长求得圆锥的弧长,利用圆锥的侧面展开扇形的弧长等于圆锥的底面周长求得圆锥的底面半径即可.【详解】∵圆锥的母线长是5cm ,侧面积是15πcm2,∴圆锥的侧面展开扇形的弧长为:215=65ππ⨯, ∵锥的侧面展开扇形的弧长等于圆锥的底面周长,∴r=62ππ=3cm , 故答案为:3.【点睛】本题考查了圆锥的计算,解题的关键是正确地进行圆锥与扇形的转化.16.8.【解析】【分析】根据已知条件得到2+2017a+a2=0,2+2017b+b2=0,ab=2,代入代数式即可得到结论.【详解】∵a,b是方程x2+2017x+2=0的两个根,∴2+2017a+a2=0,2+2017b+b2=0,ab=2,∴(2+2019a+a2)(2+2019b+b2)=(2+2017a+2a+a2)(2+2017b+2b+b2)=4ab=8,故答案为:8.【点睛】本题考查了一元二次方程根与系数的关系,熟练掌握根与系数的关系是解题的关键.17.110【解析】【分析】根据圆内接四边形的任意一个外角等于它的内对角解答.【详解】∵四边形ABCD是⊙O的内接四边形,∴∠BAE=∠BCD=110°,故答案为:110.【点睛】本题考查了圆内接四边形的性质,掌握圆内接四边形的任意一个外角等于它的内对角是解题的关键.18.相交或相切【解析】【分析】根据直线与圆的位置关系即可得出结论.【详解】解:∵点P在直线l上,且点P到圆心O的距离为4cm,等于直径,∴点P在⊙O上∴直线l与⊙O相交或相切故答案为:相交或相切【点睛】本题考查直线与圆的位置关系,解题的关键是熟知直线与圆的三种位置关系.19.【解析】【分析】如图作△ABC 的内切圆,切点分别为 E ,F ,G ,根据切线长定理即可解决问题;【详解】解:如图作△ABC 的内切圆,切点分别为 E ,F ,G ,∵BE =BF ,AF =AG ,CE =CG ,∴BE ==, 故答案为. 【点睛】本题考查角平分线的性质,三角形的内切圆,切线长定理等知识,解题的关键是熟练掌握基本知识,属于中考常考题型.20.0x =或9x =-【解析】【分析】因式分解法求解可得.【详解】解:()90x x +=,0x ∴=或90x +=,解得:0x =或9x =-,故答案为:0x =或9x =-.【点睛】本题主要考查解一元二次方程的能力,熟练掌握解一元二次方程的几种常用方法:直接开平方法、因式分解法、公式法、配方法,结合方程的特点选择合适、简便的方法是解题的关键.21.(1)见解析(2)15 4【解析】【分析】(1)由△ADE沿直线AB翻折得到△ADF,得到∠DAE=∠DAF,∠AED=∠F=90°,由于OA=OD,于是得到∠DAE=∠ODA,根据平行线的判定定理得到OD∥AF,根据平行线的性质得到OD⊥DF,于是得到结论;(2)连接DC,由于AC是O的直径,即CD⊥AB;又FD与BC均是O的切线且相交于点G由切线长定理可得:GD=GC,于是得到∠GDC=∠GCD,由于GD是Rt△BDC斜边上的中线,即GD=12BC,由于△ADE沿直线AB翻折得到△ADF,得到sin∠DAE=sin∠DAF=35,解直角三角形得到sin∠DAC=DCAC=10DC=35,得DC=6,由勾股定理得AD=8;根据三角形相似即可得到结论.【详解】(1)证明:∵△ADE沿直线AB翻折得到△ADF,∴∠DAE=∠DAF,∠AED=∠F=90°,又∵OA=OD,∴∠DAE=∠ODA,∴∠DAF=∠ODA,∴OD∥AF,∴∠ODF+∠F=180°,∴∠ODF=90°,∴OD⊥DF,∴DF是O的切线;(2)连接DC,∵AC是圆O的直径,∴∠ADC=90°,即CD⊥AB;又∵FD与BC均是圆O的切线且相交于点G,由切线长定理可得:GD=GC,∴∠GDC=∠GCD,又∵Rt△BDC中,∠GCD+∠B=90°,∠GDC+∠GDB=90°,∴∠B=∠GDB,∴GD=GB,∴GD是Rt△BDC斜边上的中线,即GD=12 BC,∵△ADE沿直线AB翻折得到△ADF,∴∠DAE=∠DAF,∴sin∠DAE=sin∠DAF=35,又∵圆O的半径为5,∴AC=10,Rt△DAC中,∠ADC=90°,∴sin∠DAC=DCAC=DC10=35,得DC=6,由勾股定理得AD=8;在Rt △ADC 与Rt △ACB 中,∠ADC=∠ACB=90°,∠DAC=∠BAC ,∴Rt △ADC ∽Rt △ACB , ∴CD AD BC AC =,即6810BC =,解得BC=152; ∴GB=GD=12BC=154. 【点睛】本题考查的知识点是切线的判定, 翻折变换(折叠问题), 相似三角形的判定与性质,解题的关键是熟练的掌握切线的判定, 翻折变换(折叠问题), 相似三角形的判定与性质. 22.(1)12m >;(2)2m =. 【解析】【分析】 ()1由0>得840m ->,解之可得;()2由()1221x x m +=+,2122x x m =+,结合1212x x x x +=得()2212m m +=+,解之可得m 的值,依据()1中的结果取舍即可得.【详解】解:()()()221[21]412m m =-+-⨯⨯+ 2248448m m m =++--840m =->,12m ∴>; ()()12221x x m +=+,2122x x m =+,∴由1212x x x x +=得()2212m m +=+,解得:10m =,22m =, 12m >, 2m ∴=.【点睛】本题主要考查根的判别式、根与系数的关系,关键是掌握1x ,2x 是方程20x px q ++=的两根时,12x x p +=-,12x x q =.23.(1)a=40,b=94,c=99;(2)八年级,见解析;(3)参加此次竞赛活动成绩优秀的人数是468人.【解析】【分析】(1)根据中位数和众数的定义即可得到结论;(2)根据八年级的中位数和众数均高于七年级于是得到八年级学生掌握防溺水安全知识较好;(3)利用样本估计总体思想求解可得.【详解】解:(1)3120%10%1004010a ⎛⎫=---⨯= ⎪⎝⎭, ∵八年级10名学生的竟赛成绩的中位数是第5和第6个数据的平方数,∴ 9494942b +== ∵在七年级10名学生的竟赛成绩中99出现的次数最多,∴c=99;(2)八年级学生掌握防溺水安全知识较好,理由:虽然七、八年级的平均分均为92分,但八年级的中位数和众数均高于七年级.(3)参加此次竞赛活动成绩优秀(x≥90)的学生人数=720×1320=468人, 答:参加此次竞赛活动成绩优秀(x≥90)的学生人数是468人.【点睛】本题考查读扇形统计图的能力和利用统计图获取信息的能力;利用统计图获取信息时,必须认真观察、分析、研究统计图,才能作出正确的判断和解决问24.(1)详见解析;(2)4+【解析】【分析】(1)先作出ABC 的外接圆,再作AB 边上的高,继而作出此高的中垂线,与外接圆的交点即为所求;(2)作以AB 为弦且AB 所对圆心角为90°的O ,则垂直于弦AB 的直径与优弧的交点即为使三角形面积最大的点C ,根据作图得出AB 边上的高可得答案.【详解】∠即为所求.解:()1如图1所示,ABD()2如图2所示,作以AB为弦,且AB所对圆心角为90的O,C点轨迹为圆上不与AB重合的任一点,∴当C在位置上时,高最长,故面积最大,=,AB4AP BP OP2∴===,则OC OA==∴=+PC2ABC ∴的面积为(11AB PC 42422⋅⋅=⨯⨯+=+故答案为:4+.【点睛】 本题主要考查作图复杂作图,解题的关键判断出点C 是以AB 为弦的圆上、圆的确定及线段的中垂线的尺规作图等知识点.25.一样大,理由见解析.【解析】【分析】根据圆周角定理,即可确定两角的大小.【详解】解:甲、乙两个人所在的位置对球门AB 的张角一样大.根据圆周角定理的推论可得∠ADB=∠ACB.【点睛】本题的解答关键是对圆周角定理的灵活运用.圆周角定理指的是一条弧所对圆周角等于它所对圆心角的一半;即同弦或等弦所对的圆周角相等.26.(1)54AF BG =;(2)(Ⅰ)54AF BG =;(Ⅱ)CP ⊥AF ,理由:见解析. 【解析】【分析】(1)根据矩形的性质得到∠B =90°,根据勾股定理得到AC =5,根据相似三角形的性质即可得到结论;(2)(Ⅰ)连接CF ,根据旋转的性质得到∠BCG =∠ACF ,根据相似三角形的判定和性质定理得到结论;(Ⅱ)根据相似三角形的性质得到∠BGC =∠AFC ,推出点C ,F ,G ,P 四点共圆,根据圆周角定理得到∠CPF =∠CGF =90°,于是得到结论.【详解】(1)∵四边形ABCD 是矩形,∴∠B =90°,∵AB =3,BC =4,∴AC=5,∴54 ACBC=,∵四边形CEFG是矩形,∴∠FGC=90°,∴GF∥AB,∴△CGF∽△CBA,∴54 CF CACG CB==,∵FG∥AB,∴54 AF CFBG CG==;(2)(Ⅰ)连接CF,∵把矩形CEFG绕点C顺时针旋转到图②的位置,∴∠BCG=∠ACF,∵54 AC CFBC CG==,∴△BCG∽△ACF,∴54 AF ACBG BC==;(Ⅱ)CP⊥AF,理由:∵△BCG∽△ACF,∴∠BGC=∠AFC,∴点C,F,G,P四点共圆,∴∠CPF=∠CGF=90°,∴CP⊥AF.【点睛】本题考查了相似三角形的判定和性质,矩形的性质,平行线分线段成比例定理,旋转的性质,熟练掌握相似三角形的判定定理是解题的关键.27.(1)x 1=-3,x 2=-9;(2)x 1=2,x 2=-13. 【解析】【分析】 (1)直接把等号左边进行因式分解,然后可得x+3=0,x+9=0,再解即可;(2)先整理成一般形式,然后用公式法解答即可.【详解】(1)(x+3)(x+9)=0,x+3=0,x+9=0,解得:x 1=-3,x 2=-9;(2) 3x 2-2=5x整理为:3x 2-5x-2=0,这里,a=3,b=-5,c=-2,b 2-4ac=(-5)2-4×3×(-2)=49>0,∴ ∴x 1=2,x 2=13-.【点睛】本题考查了解一元二次方程的应用,解此题的关键是能把一元二次方程转化成一元一次方程.28.(1)证明见解析;(2)证明见解析;(3).【解析】【分析】(1)根据圆周角定理即可证明;(2)作AM AD ⊥交DC 延长线于点M ,连接MG ,AQ ,证明AMG QAG ∆≅∆,得到45GMH AMD ∠=∠=︒,易求得GQ =;(3)延长MG 交DB 于N ,延长BF 交6030m n =⎧⎨=-⎩于W ,则四边形AMND 是正方形,求出13EF ED =,设EF x =,则3ED x =,列式求出EF ,易得AB ,问题得解. 【详解】解:(1)证明:AB Q 是直径90BCD ABD ∴∠+∠=︒BCD DAB ∠=∠90DAB DBA ∴∠+∠=︒(2)证明:作AM AD ⊥交DC 延长线于点M ,连接MG ,AQ,AB Q 是直径,90AQB ∴∠=︒,90ACB ∠=︒ABD ABG ∠=∠AQ AD ∴=CA CB =45CBA CAB ∴∠=∠=︒45ADM ∴∠=︒AM AD ∴=AM AQ ∴=BAD BAQ ∠=∠,45BAQ QAG ∠+∠=︒45BAD GAM ∴∠+∠=︒GAQ GAM ∴∠=∠AMG QAG ∴∆≅∆90AMG ∴∠=︒45GMH AMD ∴∠=∠=︒MG ∴=GQ ∴=(3)延长MG 交DB 于N ,∴四边形AMND 是正方形延长BF 交6030m n =⎧⎨=-⎩于W //BW MN BWG MGA ∴∠=∠BWG BGW ∴∠=∠BG BW ∴=MG BD BW +=WF MG ∴=FC MC ∴=BAD BCD HGC ∠=∠=∠,3HG CH =1tan 3BAD ∴∠=13BD BF AD AD ∴== 13EF ED ∴= 设EF x =,则3ED x =222EC CM DE =+222((3)x x ∴+=+x ∴=DF =4BD =,12AD =AB ∴=r =【点睛】本题是圆和四边形的综合问题,考查了圆周角定理、三角形全等的判定和性质以及三角函数等知识点,涉及知识点较多,图形较为复杂,能够作出辅助线是解题关键.。
人教版英语九年级上册 Units 1-5 期中综合复习题一、单项选择(15分)1. —Can you tell me how to improve my spoken English? —Why not _________an English language club?A. joinB. take part inC. joininD. take part2. They decided___________to Hainan Island on vacation at last.A. goB. to goC. goingD. went3. You will fail the exam ___________you study hard from now on.A. untilB. ifC. as soon asD. unless4. We all love Mr.Wang because he regards us __________his own children.A. forB. asC. ofD. to5. —Can you remember this park? We _____ here.—Sure. But now I ______ in it.A. are used to take a walk, am used to swimB. are used to taking a walk, am used to swimmingC. used to take a walk, used to swimD. used to take a walk, am used to swimming6. —Which sweater do you prefer, the yellow one or the pink one?—____. I like a light blue one.A. EitherB. BothC. AnyD.Neither7. My hometown____________ a lot in the last past few years.A. changedB. is changingC. has changedD. is changed8. He’s a big boy now. Don’t _____________ him any more.A. worry aboutB. be afraid ofC. be terrified ofD. complain about9. There are hardly any new words in the story, __________?A. isn’t thereB. aren’t thereC. is thereD. are there10. The computeris too expensive for me to afford ________it.A. buyB. buyingC. boughtD. to buy11. He has been afraid of being along since his father _____________ five years ago.A. diedB. deadC. dyingD. death12. You are too careless. You should _______________ to your spelling.A. concentrateB. pay attentionC. be allowedD. look forward13. —12,500 kilometers is too long a journey!—Yes. _________the journey was long and hard, the Red Army (红军) pushed on.A. ThoughB. BecauseC. AsD. While14. —What rules do you have at home?—I have to _____my room every morning.A. pick upB. call upC. clean upD. turn up15. If I__________a lot of money, I would buy a new computer.A. haveB. hasC. hadD. is having二、完形填空(10分)“Where is the university (大学)?”This is a question that many visitors to Cambridge (剑桥) ask. But no one can give them a _____1_____ answer, for there is no wall to be found ____2____the university. The university is the city. You can find classroom buildings, _____3____, museums and offices of the university all over the city. And most of its members are the students and ____4______ of the thirty-one colleges (学院).Cambridge was already a _____5______ town long before the first students and teachers arrived 800 years ago. It grew up by the river Granta, and the river was once _____6______the Cam. A ____7____was built over the river as early as 875. So the town got its name “Cambridge”.In the fourteenth and fifteenth centuries more and more land was used for college buildings. The town grew much______8_____ in the nineteenth century after the opening of the railway in 1845.Cambridge became a ______9______ in 1951 and now it has a population of over 100,000. Many young students in other countries _____10______ to study at Cambridge. Thousands ofpeople from all over the world come to visit the university town. It has become a famous place around the world.()1. A. true B. clear C. right D. real()2. A. around B. in C. near D. by()3. A. cinemas B. parks C. zoos D. libraries()4. A. parents B. farmers C. workers D. teachers ()5. A. interesting B. usual C. developing D. common ()6. A. said B. called C. spoken D. talked()7. A. bridge B. building C. station D. house()8. A. smaller B. slower C. faster D. cleaner ()9. A. city B. college C. university D. country ()10. A. hope B. hate C. stop D. need三、阅读理解(40分)AJenny lived in a town. Her father Mr. Yang hada shop there and sold clothes in it. The shop keeper was born in a poor family and was at school no more than a year. He was always sorry for that though hehad much money now. He hoped his daughter could become a scientist. But thegirl didn’t like anything else except singing. She often went to concerts,bought a lot of records the famous pop stars made and insisted on listening to the music when she was free. Of course she wanted to be a pop star, too.Her parents wanted to stop her, but she didn’t listen to them and they had to agree to her choice. They engaged (聘用) an old man who was good at music as a private teacher.Five years passed, Mr. Yang bought all kinds of musical instruments for Jenny and they visited some places where the famous singers were born. Of course he spent a lot of money on it. But he found the girl didn’t make any progress. At last the teacher didn’t think the girl could become a singer at all and had to tell Mr. Yang about it. The man became angry and said, “Why didn’t you tell me about it earlier? My daughter learned nothing but I paid you month after month!”“I think you should thank me for it,”said the teacher. “Another teacher, who teaches badly, is paid more than I was. And I saved much money for you!”1. Mr. Yang was at school for a short time because _____________.A. his family was too poor to support himB. he has to help his parentsC. he was weak in his lessonsD. he didn’t like studying at all2. Jenny spent much money buying records and went to concerts in order to _________.A. visit some placesB. become a pop starC. learn singingD. B and C3. The underlined phrase “musical instruments”in the story means__________.A. 乐谱B. 乐器C. 乐章D. 乐队4. Mr. Yang became angry because ____________.A. he paid a lot of money to the girlB. his daughter decided to give up musicC. his daughter spent many years on musicD. the teacher taught his daughter nothing5. The teacher thought ___________.A. he had taught Jenny allB. the girl could be a singerC. he was paid less than his work matesD. it was wrong for Jenny to stop studying musicBLetterOneDear Editor,After I finish my homework, I often go online and chat with my friends. Sometimes I play internet games. But my parents hate to see me playing games on the computer. Maybe they have heard too much news about how QQ and Internet games harm children. Once I went to a net bar to play games after school. But after thatI told my parents that I was playing basketball at school. I said so because I didn’t want to make them unhappy. I feel bad about it. However, I need to rest for a while by playing computer games after studying for a long time. I really want my parents to understand that. Do foreign parents do the same to their children? Please help me.Li PingLetterTwoDear Li Ping,I think it’s not strange for parents to keep their children away from anything bad. Foreign parents will do the same as your parents! They may not let their children watch TV for too long a time, or like your parents, they don’t want their children to play computer games.Talk to your parents and be honest to them,I think tell them what you are doing and why you are doing so to make them understand you. It’s never good to do things behind your parents’backs.They aren’t fools as you think sometimes! Our parents seem to know what is the best for us. Remember: to be honest is the best way.Good luck,Rebecca6. From the passage,we can learn that Li Ping often ________.A. talks to his friends on the InternetB. plays basketball after schoolC. plays computer games at homeD. chats online before doing his homework7. The boy goes online ___________.A. to get news about QQB. just to have a restC. to show that he hates studyingD. just to find some friends8. According tothe passage, foreign parents ____________.A. let their children play computer gamesB. don’t allow their children to watch TVC. let their children watch TV for a long timeD. keep their children away from bad things like Chinese parents9. The underlined sentence in Letter Two means____________A. You must do everything in front of your parentsB. You must always listen to your parents carefullyC. You should tell your parents what you do before or after doing itD. You should not do anything to make your parents worry about you10. The editor thinks _____________.A. children should play computer games secretlyB. playing computer games can be very helpful to children’s studiesC. children should be honest and try to make their parents understand themD. foreign parents don’t care for their children as much as Chinese parentsCHave you ever met anyone of your age from America? Do you think you would have a lot in common with middle school students there?With only one look, you can see lots of differences. For example, classes in American schools are smaller than yours. Most classes have no more than 30 students. Most students in the USA don’t wear school uniforms. And they don’t have group exercises each day as the way you do.If they saw your exercises, they would think you were very strange!clothes,“Need a ride?”he asked. My plane was ____6_____ in an hour so I didn’t think_____7_____. I took my bags, climbed carefully onto the motorcycle and shouted,“To the airport please!”It was my first time on a motorcycle so I was badly ____8_____. The young man drove so fast that I kept my ___9____ shut all the way. Suddenly, the motorcycle came to a stop. “Here we are, sir!”he said. I looked at my watch and there were only ten minutes left.I was just in time for my _____10_____. The young man wished me a nice trip, and then quickly drove away.五、补全对话(10分)根据下面的对话情景,在每个空白处填上一个适当的句子,使对话的意义连贯、完整。
⼈教版九年级历史上册期中复习试题及答案(三套)历史期中考试复习资料⼀、单项选择:1.⾦字塔建筑群位于()A 两河流域B 尼罗河流域C 印度河流域D 黄河流域2.西欧封建等级制度是在()基础上形成的A 种姓制度B罗马共和制 C 查理·马特实⾏的采⾢制 D 罗马帝制3.罗马共和国被罗马帝国取代的时间是()A 公元前509年B公元前27年 C 公元27年 D 476年4.“给我⼀个⽀点,我将撬动整个地球”,这是()的名⾔A 荷马B 阿基⽶德C达·芬奇 D 但丁5.在西部⼀个穆斯林信徒家中,发现书柜上有⼀本《古兰经》,由此推断这家⼈可能信奉()A 佛教B 基督教C 伊斯兰教D道教6.被誉为“旧时代的最后⼀位诗⼈,同时⼜是新时代的最初⼀位诗⼈”指的是()A 荷马B 阿基⽶德C 达·芬奇D 但丁7.阿拉伯数字的发明者是()A 阿拉伯⼈B 古埃及⼈C 古印度⼈D 古巴⽐伦⼈8.有⼈准备去考察有关南⽅古猿的⽣活情况,他应该去()A 欧洲B 亚洲C ⾮洲D 美洲9.下列亚⾮欧的古代⽂明中,环地中海的四个⽂明古国是()①古埃及②古巴⽐伦③古印度④古希腊⑤古罗马A ①②③④B ②③④⑤C ①②④⑤D ①③④⑤10.有关古希腊的叙述不正确的有()A是欧洲⽂明的发源地B是地跨亚欧⾮三洲的⼤帝国C最早的史诗是《荷马史诗》 D 有著名的科学家阿基⽶德11.世界上第⼀部⽐较完备的成⽂法典诞⽣于()A古埃及B古巴⽐伦C古印度D古中国12.英国⽂艺复兴的代表⼈物是()A但丁B达芬奇C莎⼠⽐亚D哥⽩尼13.认为到达的地⽅是印度,称当地居民为印第安⼈的航海家是()A哥伦布B迪亚⼠C达伽马D麦哲伦14.西欧最⼤的⼟地所有者是()A国王B贵族C宫相D教皇15.下列不是发⽣在同⼀时期的历史事件是()A波斯帝国灭埃及B佛教的创⽴C亚历⼭⼤帝国的建⽴D罗马共和国的建⽴16.楔形⽂字的发明创造⼈是()A古代埃及⼈B苏美尔⼈C腓尼基⼈D希腊⼈17.“以⼈为中⼼,反对神权”的⼈⽂主义思潮出现在()A13世纪B14世纪C15世纪D16世纪18、14——16世纪的⽂艺复兴运动最先开始于:()A、英国B、波兰C、意⼤利D、法国19、⽂艺复兴运动的核⼼思想是:()A、⼈⽂主义B、⾃由主义C、个⼈主义D、理性主义20、⽂艺复兴运动的实质是:()A、⼈⽂主义B、既是资产阶级的⽂化运动,⼜是资产阶级的思想解放运动C、古代希腊和古代罗马的⽂化复兴D、资产阶级的⽂化运动21、被誉为⽂艺复兴运动的先驱的⼈是:()A、但丁B、哥⽩尼C、布鲁诺D、达·芬奇22、哪部作品被认为是欧洲开始从中世纪向近代社会过渡的标志:()A、《罗蜜欧与朱丽叶》B、《最后的晚餐》C、《歌集》D、《神曲》23、⽂艺复兴运动时期多才多艺的⽂化巨⼈是:()A、但丁B、达·芬奇C、莎⼠⽐亚D、开普勒24、⽂艺复兴运动时期最能代表英国最⾼⽂学成就的⼈是:()A、哈代B、奥斯汀C、莎⼠⽐亚D、狄更斯25、15世纪时,欧洲最先从事海外探险的国家是:()A、英国B、意⼤利C、葡萄⽛D、西班⽛26、在15世纪的远洋航⾏中,有个探险者既没有到达⼼⽬中的地⽅,也没有获得⼤量的黄⾦或其他财富,却使⽀持他远洋航⾏的国家在他到达的地⽅占有⼴阔的殖民地。
九年级上学期期中复习综合练习(三)一、单项选择(30分)( ) 1. Mrs. White isn’t here. She London.A. has been toB. has gone toC. went toD. has gone( ) 2. ----- Which do you prefer, a glass of water or a cup of tea?------ . Thanks. I’m not thirsty.A. BothB. EitherC. NeitherD. None( ) 3. While I with my friend, she came in.A. am talkingB. was talkingC. talkedD. am going to talk( ) 4.In our class, about of the students are girls.A. three fifthB. third fifthC. third fifthsD. three fifths( ) 5. Boys and girls, please listen to me carefully. I have to tell you.A. important somethingB. anything importantC. something importantD. important nothing ( )6 . I this book for two weeks. I have to return it now.A. borrowedB. have borrowedC. keptD. have kept( ) 7. If you don’t hurry up, you’ll be late for class.A. whileB. orC. /D. but( ) 8. All of us feel surprised that ________ a little boy can eat ______ much food.A. so; suchB. such; soC. so; soD. such; such( ) 9. —I don’t know your uncle.---Oh. The man ______ came to see me this morning is my uncle.A. whoB. whoseC. whichD. whom( ) 10. Mum asked me to close the windows before going to bed, I forget to do so.A. Though; /B. Though; butC. Till; /D. Until; then( ) 11. He was supposed here yesterday.A. comeB. to comeC. comingD. comes( ) 12. ---We can use QQ to talk with each other on the Internet.---Really? Will you please show me it?A. what to useB. how to useC. how can I useD. what can I use( ) 13. They great progress in the past 4 years.A. madeB. had madeC. have madeD. make( ) 14. This is the museum______ we visited last year.A. whereB. in whichC. whenD. that( ) 15. I think it’s g ood us do exercise every morning.A. for; toB. for; forC. to; forD. to; to( ) 16. He is afraid of __________ out at night.A. goB. goingC. to goD. goes( ) 17.We still couldn’t decide _________ with our difficulties in learning English.A. how to doB. how to dealC. what to dealD. what to solve( ) 18.As time _________, we know each other better.A. goes byB. passes byC. went offD. going by( ) 19. I find it easy _________ English.A. studyB. learnsC. to learnD. studies( ) 20. If I _____ you, I _____ go to the movie tonight.A. am , willB. were ,wouldC. was, willD. were , can( ) 21. If it __________ fine, we’ll go fishing tomo rrow.A. isB. will beC. beD. was( ) 22. Don’t ___________late for class.A. isB. beC. to beD. /( ) 23. It takes me half an hour __________ to work every day.A. walkB. to walkC. walkingD. walks( ) 24.You used to be really little fat, _________ you?A. didB. don’tC. didn’tD. do( ) 25. No children to watch this kind of movie because it’s too scary.A. should allowB. shouldn’t be allowedC. should be allowedD. don’t allow( ) 26.At first she had trouble __________ complete sentences.A. makingB. to makeC. makeD. made( ) 27. The_______ should be taken good care of. They are too young.A. one-year-oldB. one-year-oldsC. one-years-oldD. one-year-old child( ) 28. The trees Alice planted two years ago growing wellA. that; isB. that; areC. which; isD. what; are( ) 29.--- I finished my work.----A. So do I.B. So does I.C. So have I.D. So did I.( ) 30. Could you please _______ the broken jeans?A. don’t wearB. no t wearC. not wearingD. not to wear二、完型填空(10分)You really have to get very old before you find you’re old. I’m in my middle fifties and I don’t feel old yet. However, sometimes I look back at my childhood and 1 things to the lifestyle that is for 2 Kids, Some things have certainly changed.One area of change is television. When I started school, most people didn’t have a television; TV was just beginning get 3 . My father 4 to go all out(尽全力)and buy a 16-inch black and white set. Still remember 5 the Disney cartoon films. That was exciting!Now, televisions have larger pictures in full color. The pictures are clearer and the sound is much more 6 . The new high definition(高清晰度)sets are as clear as ___ 7 screens.The type and number of programs have 8 greatly. There are hundreds of channels (频道)and more shows than one person could ever watch. There are many fine entertainment and educational shows. There’s also a lot of garbage that most parents don’t want their kids to watch. 9 ,we have more choices (选择),and that is good.I wonder what 10 will be like when today’s kids are my age.( ) 1. A. forget B. remember C. compare D. miss ( ) 2. A. today’s B. yesterday’s C. tomorrow’s D. future’s ( ) 3. A. gone B. new C. expensive D. popular ( ) 4. A. made B. decided C. hoped D. tried ( ) 5. A. making B. watching C. preparing D. buying ( ) 6. A. untrue B. loud C. high D. realistic ( ) 7. A. movie B. television C. radio D. telephone ( ) 8. A. lost B. increased C. watched D. played ( ) 9. A. As usual B. Above all C. Besides D. Especially ( ) 10.A. movies B. food C. cars D. televisions 三、阅读理解(30分)( A )A. At 2:00B. At 3:00C. At 6:00D. At 7:00( ) 2.Which activity lasts the longest ?A. Fashion ShowB. Book ClubC. PicnicD. Camera Club( ) 3.All the activities are in the afternoon except ____________ .A. Exercises ClassB. Travel LectureC. Sewing ClassD. Painting( ) 4. Jim is very interested in sports . He can take part in sports activities every___________. .A. MondayB. WednesdayC. ThursdayD. Friday( ) 5. When does the school have dance classes ?A.On13th and 27thB. On 27th and 29thC. On 10th and 27thD. On 10th and 15th(B)I just received your letter. And I was very surprised to know that you decided to drop out of school and wanted to be a model(模特).Being a model for a living is not easy. In fact, a famous person like me has a lot of problems that you couldn’t see. I can’t eat what I like, even thought I’m very hungry. Keeping thin makes me look more beautiful on the stage because no one would like to see a heavy model.Besides, I have to wear a heavy coat in the hot sun., in a swimming suit in the cold air. And practising walking nicely every day is tiring for me.You might say I made much money from modeling. But my dear niece(侄女),you have to know that money is, nothing, knowledge is everything. School is important and everyone should go to school for a certain period of time. The longer they stay at school, the better they will be. Very often, I hope I can give up my job and continue my studies at school. But it is very difficult for me to go back to school again. I am too old to go back to school now.You are a pretty young girl with a bright future. You only have one year to finish your studies in high school.A year is really short. Please do consider my words carefully before you decide. Of course, there is only one thing I care about, and that is your happiness.Love,Emma( ) 6. What was Emma surprised about?A. Alice wanted to keep thin.B. Alice decided not to do modelingC. Alice ate too much and became a heavy girlD. Alice decided not to finish her studies at school( ) 7. Emma can’t go back to school again, because .A. she is tired of being s studentB. she wants to make more money from modelingC. she is so old that she has missed the best time in schoolD. she has done a good job and makes a lot of money as a model( ) 8. How long does Alice still have to study in high school?A. One yearB. Two yearsC. Three yearsD. The longer, the better( ) 9. Emma only cares about .A. Alice’s beautyB. Alice’s happinessC. Alice’s ageD. Alice’s swimming suit( ) 10. From the letter we know that .A. Emma is a famous modelB. Emma likes being a model for a livingC. Alice will go on her studies in high schoolD. Emma can eat what she likes when she is very hungry( C )The aim of students who came to school is to study. But to study requires a right way,or you waste either the time or the money. The following are the ways of studying.The best time for reading is morning,because in the morning,the air is fresh and the mind is clear. For that reason,we can get good result.In studying we must have patience. If we have not known a text well,we must read it again. We should not read the next one till we have learned the first one.When we are studying,we must put our hearts into the book,or we can get nothing from the book while we are reading.We must always ask “whys”. If it is not well understood,write it down and ask our teachers or our parents,or friends. In any possible way,we must know it completely and what we've learned can be used well and made better.Though there are many ways for studying,yet the above mentioned will be quite enough if we can keep them in heart and do so.( ) 11. The passage tells us ______.A. the importance of readingB. to read in the morningC. to pay attention to the ways of studyingD. to have patience in studying( ) 12. The passage has taught us ______ ways for studying.A. threeB. fourC. fiveD. many( ) 13. We'd better read in the morning because ______.A. it's easy to remember what we have learnedB. the air is fresh and the mind is clearC. it's difficult to get good resultsD. we must have patience( ) 14. If we can't put our hearts into the book when we read,it is ______.A. easy to understand it wellB. better to get something from itC. impossible for us to get something from itD. possible to learn something from it( ) 15. In studying we must always ask “whys”in order to ______.A. understand the book wellB. write down the questionsC. do with the new wordsD. get some questions to ask our teachers四、根据汉语和首字母提示完成句中所缺的英语单词(10分)1.The students gave the famous writer a warm w_______________ when he arrived.2.The head teacher made a s________________ about our study in our class meeting.3.There are many p________________ of interest in Beijing.4.A________________ he is rich, his life is not happy.5. At the b_______________ of the new term, I make a perfect plan for my English course.6. We had a pleasant ___________________(经历)quiet village during the summer camp.7.There is too much p___________________(污染)in our city, which is doing great harm to our health.8. We should ________________(遵守) the rules.9. The ______________________(人口) of China is increasing.10.Our teacher will organize a football match a_________________(反对) a visiting school.五、动词填空(10分)( A )Last Sunday, I ___________(do) my homework when the telephone rang. I answered the phone. It was Lily. She wanted___________ (speak) to my sister, Jane. I told her that Jane___________ (leave) home just a few minutes befor e. “Could you leave a message for her?” I said. “That’s very kind of you,” Said Lily, “An English party _____________ (hold) at 6 o’clock this evening. Please tell her not to be late.” “OK, I’ll tell her as soon as she___________ (come) back,” I said.(B)Li Hua ____________ (learn ) English for about one year. But he is not good at it. And he ________ (make) many mistakes in her last exam. Now he ____________(try ) his best to learn it. He hopes he ________(improve) his English soon. He wants ____________( know) how to learn English well. Could you give him some advice?六、词语运用(10小题,每小题l分,共10分)根据短文内容, 用方框中所给词的适当形式填空,使文章通顺、完整。