2020年成都市武侯区九年级二诊试卷

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四川省成都市武侯区2020年中考语文二诊试卷(含解析)-(5597)

四川省成都市武侯区2020年中考语文二诊试卷(含解析)-(5597)
毛笔,中国独有的文化发明 ①中国文房四宝“笔墨纸砚”之首的笔,即毛笔,是中国独有的文化产品。在几千年的 历史中,中国文人都是用它挥洒奇思,宣泄情怀,中国历史便成了“笔下春秋”。 ②关于毛笔始于何时,众说纷纭。最有故事性的说法要属秦国大将军蒙恬造笔。《史记》
《博物志》等书籍上都有记载,蒙恬有君命在外,嫌以刀刻字太慢,于是“以枯木为管,
⑤最初,毛笔是在原始竹笔的基础上改良而来,制作粗糙。随着汉魏书法艺术的不断发
展,毛笔选料逐渐优良,制作逐渐精致。唐朝时,安徽宣州制出的“宣笔”,受到众多
文人学士的称赞和推崇。宋末天下大乱,宣州笔工为避战乱,另谋生计。自元代始,浙
江湖州逐渐取而代之,成为新的制笔中心。到了明代,湖州毛笔制作工艺也更加成熟,
A.有仙则名
名:出名
B.惟吾德馨
馨:德行美好
C.然后能自反也
反:同“返“,返回
D.学学半
学:教导
(2)下列语句中加点词的意义和用法相同的一项是
A.可以调素琴
扶苏以数课故
B.其此之谓乎
禽兽之变诈几何哉
C.皆以美于徐公
所欲有甚于生者
D.不知其善也
其如土石何
(3)对文中画线句子翻译正确的一项是 今齐地方千里,百二十城,宫妇左右莫不私王,朝廷之臣莫不畏王。 A.如今在齐国这片广阔千里的土地上,有一百二十座城池,宫妇和身边的近臣没有不 认为大王偏私的;朝廷中的大臣没有不惧怕大王的。
置郡县,愈于南夷。天子以为然,乃拜相如为中郎将,建节往使。至蜀,司马长卿便略 定西夷,除边关,关益斥②.还报天子,天子大喜。
相如既死,天子遣使往从悉取其书,其遗札书言封禅事,天子异之。 (选自《史记•司马相如列传》,有删改)
【注】①空籍三人:假借虚构的三个人。②苑囿:在皇家园林游猎。③斥:开拓。 (1)下列语句中加点词解释有误的项是(在答题卡的相应位置填出代表该选项的字母)

2020年四川省成都市武侯区中考数学二诊试卷

2020年四川省成都市武侯区中考数学二诊试卷

中考数学二诊试卷题号一二三四总分得分一、选择题(本大题共10小题,共30.0分)1.在-3,2,-2,0四个数中,最小的数是()A. -3B. 2C. -2D. 02.如图所示的工件,其俯视图是()A.B.C.D.3.同舟共济克时艰,众志成城战疫魔,全国广大共产党员为支持新冠肺炎疫情防控工作踊跃捐款,他们的善心和爱意汇聚成汩汩暖流,在春天的神州大地奔涌流淌.据统计,截止到2020年3月10日,全国党员自愿捐款共计76.8亿元,将数据76.8亿用科学记数法表示为()A. 7.68×109B. 7.68×108C. 76.8×108D. 76800000004.下列图案中,既是中心对称图形又是轴对称图形的是()A. B. C. D.5.下列计算正确的是()A. 3x3+4x3=7x6B. 2x3•3x3=6x3C. (-2ab)2=4a2b2D. (a-b)2=a2-b26.若点M(m+3,m-2)在x轴上,则点M的坐标为()A. (0,-5)B. (0,5)C. (-5,0)D. (5,0)7.将二次函数y=2(x+3)2-1的图象向上平移4个单位长度,得到的二次函数的表达式为()A. y=2(x+7)2-1B. y=2(x-1)2-1C. y=2(x+3)2-5D. y=2(x+3)2+38.将直角三角板按照如图方式摆放,直线a∥b,∠1=130°,则∠2的度数为()A. 60°B. 50°C. 45°D. 40°9.销售额(万6.47.57.889.810元)月数(个)213141则这组数据的众数和中位数分别是()A. 10,7.8B. 9.8,7.9C. 9.8,7.8D. 9.8,810.如图,AB是⊙O的直径,点C在AB的延长线上,过C作⊙O的切线CD,切点为D,连接AD.若⊙O的半径为6,tan C=,则线段AC的长为()A. 10B. 12C. 16D. 20二、填空题(本大题共9小题,共36.0分)11.因式分解:x2y-4y3=______.12.已知关于x的一元二次方程2x2+4x+m-1=0有两个相等的实数根,则m的值为______.13.在一次函数y=(2a-5)x+1中,y的值随着x值的增大而减小,则a的取值范围是______.14.如图,在▱ABCD中,∠C=30°,过D作DE⊥BC于点E,延长CB至点F,使BF=CE,连接AF.若AF=4,CF=10,则▱ABCD的面积为______.15.已知a,b是关于x的一元二次方程x2-3x-1=0的两个实数根,则代数式3ab-a-b的值为______.16.如图,在Rt△ABC中,∠ACB=90°,AC=BC=2,D是BC的中点,以D为圆心,DC长为半径作弧,交DA于点E;再以A为圆心,AE长为半径作弧,交AC于点F,则FC的长为______.17.有六张大小形状相同的卡片,分别写有1~6这六个数字,将它们背面朝上洗匀后,任意抽取一张,记卡片上的数字为a,则a的值使得关于x的分式方程-1=有整数解的概率为______.18.如图,点O是矩形ABCD的对角线的交点,AB=15,BC=8,直线EF经过点O,分别与边CD,AB相交于点E,F(其中0<DE<).现将四边形ADEF沿直线EF折叠得到四边形A′D′EF,点A,D的对应点分别为A′,D′,过D′作D′G⊥CD 于点G,则线段D′G的长的最大值是______,此时折痕EF的长为______.19.如图,将反比例函数y=(k>0)的图象向左平移2个单位长度后记为图象c,c与y轴相交于点A,点P为x轴上一点,点A关于点P的对称点B在图象c上,以线段AB为边作等边△ABC,顶点C恰好在反比例函数y=-(x>0)的图象上,则k=______.三、计算题(本大题共2小题,共20.0分)20.(1)计算:(π-2020)0-+4sin45°-()-1.(2)解不等式组:,并把不等式组的解集表示在如图的数轴上.21.如图,一架无人机在距离地面高度为21.4米的点B处,测得地面点A的俯角为47°,接着,这架无人机从点B沿仰角为37°的方向继续飞行20米到达点C,此时测得点C恰好在地面点D的正上方,且A,D两点在同一水平线上,求A,D两点之间的距离.(结果精确到1米;参考数据:sin37°≈0.60,cos37°≈0.80,tan37°≈0.75,sin47°≈0.73,cos47°≈0.68,tan47°≈1.07,≈2.45)四、解答题(本大题共7小题,共64.0分)22.先化简,再求值:(+2)÷,其中a=+1,b=-1.23.小颖为学校联欢会设计了一个“配紫色”游戏:如图是三个可以自由转动的转盘,A盘和B盘被分成面积相等的几个扇形.游戏者同时转动两个转盘,如果其中一个转盘转出了红色,另一个转盘转出了蓝色,那么他就赢了,因为红色和蓝色在一起配成了紫色.(1)若游戏者同时转动A盘和B盘,请利用画树状图或列表的方法,求他获胜的概率;(2)若游戏者同时转动B盘和C盘,请直接写出他获胜的概率,不必写出求解过程.24.如图,在平面直角坐标系xOy中,一次函数y=-x+3的图象与反比例函数y=的图象相交于A(m,6),B两点.(1)求反比例函数的表达式及点B的坐标;(2)点P在x轴上,连接AP,BP,若△ABP的面积为18,求满足条件的点P的坐标.25.如图,△ABC内接于⊙O,AB为⊙O的直径,D为的中点,过D作DF⊥AB于点E,交⊙O于点F,交弦BC于点G,连接CD,BF.(1)求证:△BFG≌△DCG;(2)若AC=10,BE=8,求BF的长;(3)在(2)的条件下,P为⊙O上一点,连接BP,CP,弦CP交直径AB于点H,若△BPH与△CPB相似,求CP的长.26.随着新冠病毒在全世界蔓延,口罩成为紧缺物资,甲、乙两家工厂积极响应政府号召,准备跨界投资生产口罩.根据市场调查,甲、乙两家工厂计划每天各生产6万片口罩,但由于转型条件不同,其生产的成本不一样,甲工厂计划每生产1万片口罩的成本为0.6万元,乙工厂计划每生产1万片口罩的成本为0.8万元.(1)按照计划,甲、乙两家工厂共生产2000万片口罩,且甲工厂生产口罩的总成本不高于乙工厂生产口罩的总成本的,求甲工厂最多可生产多少万片的口罩?(2)实际生产时,甲工厂完全按计划执行,但乙工厂的生产情况发生了一些变化.乙工厂实际每天比计划少生产0.5m万片口罩,每生产1万片口罩的成本比计划多0.2m 万元,最终乙工厂实际每天生产口罩的成本比计划多1.6万元,求m的值.27.在△ABC中,∠BAC=60°,AD平分∠BAC交边BC于点D,分别过D作DE∥AC交边AB于点E,DF∥AB交边AC于点F.(1)如图1,试判断四边形AEDF的形状,并说明理由;(2)如图2,若AD=4,点H,G分别在线段AE,AF上,且EH=AG=3,连接EG交AD于点M,连接FH交EG于点N.(i)求EN•EG的值;(ii)将线段DM绕点D顺时针旋转60°得到线段DM′,求证:H,F,M′三点在同一条直线上28.已知抛物线y=-x2+bx+c经过点A(4,3),顶点为B,对称轴是直线x=2.(1)求抛物线的函数表达式和顶点B的坐标;(2)如图1,抛物线与y轴交于点C,连接AC,过A作AD⊥x轴于点D,E是线段AC上的动点(点E不与A,C两点重合);(i)若直线BE将四边形ACOD分成面积比为1:3的两部分,求点E的坐标;(ii)如图2,连接DE,作矩形DEFG,在点E的运动过程中,是否存在点G落在y轴上的同时点F恰好落在抛物线上?若存在,求出此时AE的长;若不存在,请说明理由.答案和解析1.【答案】A【解析】解:-3<-2<0<2,则最小的数是-3.故选:A.根据正数大于0,0大于负数,可得答案.本题考查了有理数比较大小,熟知正数大于0,0大于负数是解题关键.2.【答案】B【解析】【分析】本题考查了简单组合体的三视图,从上边看得到的图形是俯视图.根据从上边看得到的图形是俯视图,可得答案.【解答】解:从上边看是一个同心圆,外圆是实线,內圆是虚线,故选B.3.【答案】A【解析】解:将数据76.8亿用科学记数法表示为7.68×109,故选:A.科学记数法的表示形式为a×10n的形式,其中1≤|a|<10,n为整数.确定n的值时,要看把原数变成a时,小数点移动了多少位,n的绝对值与小数点移动的位数相同.当原数绝对值>10,n是正数;当原数的绝对值<1时,n是负数.此题考查科学记数法的表示方法.科学记数法的表示形式为a×10n的形式,其中1≤|a|<10,n为整数,表示时关键要正确确定a的值以及n的值.4.【答案】B【解析】解:A.是轴对称图形,不是中心对称图形;B.既是中心对称图形又是轴对称图形;C.是中心对称图形,不是轴对称图形;D.是中心对称图形,不是轴对称图形.故选:B.根据定义:如果一个图形沿一条直线折叠,直线两旁的部分能够互相重合,这个图形叫做轴对称图形;把一个图形绕某一点旋转180°,如果旋转后的图形能够与原来的图形重合,那么这个图形就叫做中心对称图形,即可判断.本题考查了轴对称图形、中心对称图形,解决本题的关键是掌握轴对称图形和中心对称图形的性质.5.【答案】C【解析】解:A、原式=7x3,故本选项计算错误.B、原式=6x6,故本选项计算错误.C、原式=4a2b2,故本选项计算正确.D、原式=a2-2ab+b2,故本选项计算错误.故选:C.根据合并同类项法则,同底数幂的乘法法则,幂的乘方与积的乘方计算法则以及完全平方公式分别计算.此题考查了合并同类项法则,同底数幂的乘法法则,幂的乘方与积的乘方计算法则以及完全平方公式,属于基础计算题.6.【答案】D【解析】解:∵M(m+3,m-2)是x轴上的点,∴m-2=0,解得:m=2.∴点M的坐标为(5,0).故选:D.直接利用在x轴上点的坐标性质得出纵坐标为零进而得出答案.此题主要考查了点的坐标,正确把握x轴上点的坐标性质是解题关键.7.【答案】D【解析】解:∵二次函数y=2(x+3)2-1的顶点坐标为:(-3,-1),图象向上平移4个单位长度后顶点坐标为:(-3,3),∴二次函数的表达式为:y=2(x+3)2+3.故选:D.由于抛物线平移后的形状不变,故a不变,所以求平移后的抛物线解析式只要根据原抛物线的顶点坐标,求出平移后的顶点坐标,即可求出解析式.本题考查了二次函数图象与几何变换,解决本题的关键是掌握二次函数的性质.8.【答案】D【解析】解:∵∠1=130°,∴∠3=180°-130°=50°,如图,作直线c∥a,∴∠4=∠3=50°,∴∠5=90°-50°=40°,∵a∥b,∴b∥c,∴∠2=∠5=40°.所以∠2的度数为40°.故选:D.作直线c∥a,根据a∥b可得b∥c,再根据平行线的性质即可求出∠2的度数.本题考查了平行线的性质,解决本题的关键是掌握平行线的性质.9.【答案】B【解析】解:这组数据的众数是9.8,中位数是=7.9,故选:B.根据众数和中位数的概念求解可得.本题主要考查众数和中位数,一组数据中出现次数最多的数据叫做众数.将一组数据按照从小到大(或从大到小)的顺序排列,如果数据的个数是奇数,则处于中间位置的数就是这组数据的中位数.如果这组数据的个数是偶数,则中间两个数据的平均数就是这组数据的中位数.10.【答案】C【解析】解:连接OD,∵CD切⊙O于点D,∴OD⊥CD,∴∠ODC=90°,∵tan C=,OD=6,∴=,∴DC=8,∴OC==10,∴AC=AO+OC=16,故选:C.连接OD,则易证△ODC为直角三角形,利用已知数据可求出CD的长,在利用勾股定理可求出OC的长,进而可求出线段AC的长.本题考查了切线的性质定理的运用、勾股定理的运用以及锐角三角函数的定义,熟练运用和圆有关的各种性质定理是解题的关键.11.【答案】y(x-2y)(x+2y)【解析】解:原式=y(x2-4y2)=y(x-2y)(x+2y).故答案为:y(x-2y)(x+2y).首先提公因式y,再利用平方差进行分解即可.此题主要考查了提公因式法与公式法分解因式,要求灵活使用各种方法对多项式进行因式分解,一般来说,如果可以先提取公因式的要先提取公因式,再考虑运用公式法分解.12.【答案】3【解析】解:∵方程2x2+4x+m-1=0有两个相等的实数根,∴△=42-4×2×(m-1)=24-8m=0,解得:m=3.故答案为:3.由方程有两个相等的实数根结合根的判别式即可得出关于m的一元一次方程,解方程即可求出m的值.本题考查了根的判别式以及解一元一次方程,解题的关键是得出方程24-8m=0.本题属于基础题,难度不大,解决该题型题目时,根据根的个数结合根的判别式得出方程是关键.13.【答案】a<【解析】解:根据y的值随着x的值增大而减小,知k<0,即2a-5<0,a<.故答案为:a<.根据一次比例函数的性质可知关于a的不等式,解出即可.本题考查了一次函数的性质,正确的理解题意是解题的关键.14.【答案】32【解析】解:∵四边形ABCD是平行四边形,∴AB∥CD,AD∥BC,AB=CD,∴∠ABF=∠DCE,∵DE⊥BC,∴∠DEC=∠DEF=∠ADE=90°,在△ABF和△DCE中,,∴△ABF≌△DCE(SAS),∴∠AFB=∠DEC=90°,∴四边形AFED是矩形,∴AD=DE=4,∵在Rt△DEC中,∠DEC=90°,∠C=30°,∴CE=DE=×4=2,∴BC=CF-CE=10-2=8,∴▱ABCD的面积=BC•DE=8×4=32,故答案为:32.由SAS证得△ABF≌△DCE,得出∠AFB=∠DEC=90°,则四边形AFED是矩形,得出AD=DE=4,求出CE=DE=2,BC=CF-CE=8,由▱ABCD的面积=BC•DE,即可得出结果.本题考查了平行四边形的性质、矩形的判定与性质、全等三角形的判定与性质、解直角三角形等知识;熟练掌握平行四边形的性质、证明四边形AFED为矩形是解题的关键.15.【答案】10【解析】解:根据题意知a+b=3,ab=-1,则3ab-a-b=3ab-(a+b)=3×3-(-1)=9+1=10,故答案为:10.先由根与系数的关系得出a+b=3,ab=-1,再代入3ab-a-b=3ab-(a+b)计算可得.本题主要考查根与系数的关系,解题的关键是掌握x1,x2是一元二次方程ax2+bx+c=0(a≠0)的两根时,x1+x2=-,x1x2=.16.【答案】(3-)【解析】解:∵D是BC的中点,∴CD=BC=1,在Rt△ADC中,∠ACD=90°,AC=2,CD=1,根据勾股定理,得AD==,根据作图过程可知:DE=DC=1,∴AE=AF=AD-DE=-1,∴FC=AC-AF=2-(-1)=3-.故答案为:(3-).根据D是BC的中点,可得CD=1,根据勾股定理可得AD=,再由作图过程可得,DE=DC=1,AE=AF=-1,进而可求出FC的长.本题考查了等腰直角三角形、作图-基本作图,解决本题的关键是掌握理解作图过程.17.【答案】【解析】解:把分式方程-1=去分母得ax-2-(x-2)=6,∴(a-1)x=6,∵分式方程有整数解,∴x=且x≠2,∴a=2或3,∴a的值使得关于x的分式方程-1=有整数解的概率==.故答案为.先把分式方程化为整式方程,解整式方程得到x=且x≠2,利用有理数的整除性得到a=2或3,然后根据概率公式求解.本题考查了分式方程的解:求出使分式方程中令等号左右两边相等且分母不等于0的未知数的值,这个值叫方程的解.分式方程的增根是令分母等于0的未知数的值,不是原分式方程的解.也考查了概率公式.18.【答案】【解析】解:如图,连接AC,BD.∵四边形ABCD是矩形,∴AC=BD,∠DAB=90°,AD=BC=8,∴BD===17,∵OD=OC=OD′=,∴点D′的运动轨迹是弧CD,当OD′⊥CD时,D′G的值最大,∵OG∥BC,OD=OB,∴DG=GC,∴OG=BC=4,∴D′G的最大值=OD′-OG=-4=,设DE=ED′=x,在Rt△EGD′中,∵EG2+D′G2=ED′2,∴(-x)2+()2=x2,解得x=,∴EG=DG-DE=∴OE===,∴EF=2OE=.故答案为:,.如图,连接AC,BD.由题意OD=OC=OD′=,推出点D′的运动轨迹是弧CD,当OD′⊥CD时,D′G的值最大,设DE=ED′=x,在Rt△EGD′中,根据EG2+D′G2=ED′2,构建方程求出x即可解决问题.本题考查矩形的性质,解直角三角形等知识,解题的关键是正确寻找点D′的运动轨迹,学会利用参数构建方程解决问题,属于中考常考题型.19.【答案】2【解析】解:如图,连接PC,过C作CH⊥x轴于H.由题意,A(0,),P(-2,0),B(-4,-),∴△ABC是等边三角形,PA=PB,∴PC⊥AB,∠ACP=∠BCP=30°,∴PC=PA,∴∠APC=∠AOP=∠PHC=90°,∴∠APO+∠CPH=90°,∠CPH+∠PCH=90°,∴∠APO=∠PCH,∴△AOP∽△PHC,∴===,∴PH=k,CH=2,∴OH=k-2,∴C(k-2,-2),∵点C在y=-上,∴-2(k-2)=-k,解得k=2,故答案为2.如图,连接PC,过C作CH⊥x轴于H.利用相似三角形的性质表示出点C的坐标,再利用待定系数法解决问题即可.本题考查反比例函数的性质,等边三角形的性质,相似三角形的判定和性质,待定系数法等知识,解题的关键是学会添加常用辅助线,构造相似三角形解决问题,属于中考填空题中的压轴题.20.【答案】解:(1)原式=1-2+4×-2=1-2+2-2=-1;(2),解不等式①,得x≤2.解不等式②,得x>-3.所以该不等式组的解集是-3<x≤2.表示在数轴上为:.【解析】(1)根据实数运算法则解答即可;(2)分别求得两个不等式的解集,然后取其交集.本题考查了实数的运算和解一元一次不等式组,解一元一次不等式组的关键是掌握一元一次不等式组的解法:解一元一次不等式组时,一般先求出其中各不等式的解集,再求出这些解集的公共部分,利用数轴可以直观地表示不等式组的解集.方法与步骤:①求不等式组中每个不等式的解集;②利用数轴求公共部分.21.【答案】解:如图,过点B作BE⊥CD于点E,过点A作AF⊥BE于点F,由题意可知:CD⊥AD,∴四边形AFED是矩形,∴AD=EF,在Rt△BCE中,BC=20,∠CBE=37°,∴BE=BC•cos37°=20×0.80≈39.2,在Rt△ABF中,AF=21.4,∠ABF=47°,∴BF==≈20,∴EF=BE-BF≈39.2-20≈19,∴AD=EF≈19(米).答:A,D两点之间的距离约为19米.【解析】过点B作BE⊥CD于点E,过点A作AF⊥BE于点F,由题意可得,四边形AFED 是矩形,然后根据三角函数求出BE和BF的长,进而即可求出A、D两点之间的距离.本题考查了解直角三角形的应用-方向角问题,解决本题的关键是掌握方向角定义.22.【答案】解:原式=(+)÷=•=2(a-b)=2a-2b,当a=+1,b=-1时,原式=2×(+1)-2×(-1)=2+2-2+2=4.【解析】先根据分式的混合运算顺序和运算法则化简原式,再将a、b的值代入计算可得.本题主要考查分式的化简求值,解题的关键是熟练掌握分式的混合运算顺序和运算法则.黄蓝绿红(黄,红)(蓝,红)(绿,蓝)白(黄,白)(蓝,白)(绿,白)所有等可能的情况有种,他获胜的有种情况,∴他获胜的概率为;(2)如下表所示:红红蓝红(红,红)(红,红)(红,蓝)黄(黄,红)(黄,红)(黄,蓝)蓝(蓝,红)(蓝,红)(蓝,蓝)∴他获胜的概率为=.【解析】(1)首先根据题意列出表格,然后由表格即可求得所有等可能的结果,由表格求得他获胜的情况,然后利用概率公式求解即可求得答案.(2)首先根据题意列出表格,然后由表格即可求得所有等可能的结果,由表格求得他获胜的情况,然后利用概率公式求解即可求得答案.此题考查的是用列表法或树状图法求概率.注意树状图法与列表法可以不重复不遗漏的列出所有可能的结果,列表法适合于两步完成的事件;树状图法适合两步或两步以上完成的事件;注意概率=所求情况数与总情况数之比.24.【答案】解:(1)把A(m,6)代入y=-x+3得-m+3=6,解得m=-2,则A(-2,6),把A(-2,6)代入y=得k=-2×6=-12,∴反比例函数解析式为y=-,解方程组得或,∴B点坐标为(4,-3);(2)直线y=-x+3与x轴的交点为C,则C(2,0),设P(t,0),∵S△APC+S△BPC=S△ABP,∴×|t-2|×6+×|t-2|×3=18,解得t=6或t=-2,∴P点坐标为(-2,0)或(6,0).【解析】(1)先把A(m,6)代入y=-x+3中求出m得A(-2,6),再把A点坐标代入y=求出k得到反比例函数解析式为y=-,然后解方程组得B点坐标;(2)直线y=-x+3与x轴的交点为C,则C(2,0),设P(t,0),利用三角形面积公式得到×|t-2|×6+×|t-2|×3=18,然后求出t得到P点坐标.本题考查了反比例函数与一次函数的交点问题:求反比例函数与一次函数的交点坐标,把两个函数关系式联立成方程组求解,若方程组有解则两者有交点,方程组无解,则两者无交点.也考查了待定系数法求函数解析式.25.【答案】解:(1)∵D是的中点,则,∵AB为⊙O的直径,DF⊥AB,∴,∴,∴BF=CD,又∵∠BFG=∠DCG,∠BGF=∠DGC,∴△BFG≌△DCG(AAS);(2)如图1,连接OD交BC于点M,∵D为的中点,∴OD⊥BC,∴BM=CM,∵OA=OB,∴OM是△ABC的中位线,∴OM=AC=5,∵,∴,∴OE=OM=5,∴OD=OB=OE+BE=5+8=13,∴EF=DE==12,∴BF===4;(3)如图2,∵弦CP交AB于点H,则点P与点C在直径的两侧,则∠CBP>∠HBP,又∵∠CPB=∠BPH,∴∠ACP=∠BCP,∵AB是直径,则∠ACB=∠APB=90°,∴∠ACP=∠BCP=45°,过点B作BN⊥PC于点N,由(2)得AB=26,在Rt△CBN中,CN=BN=BC=12,∵∠CAB=∠CPB,∴tan∠CAB=tan∠CPB=,即,故PN=5,∴PC=CN+PN=5+12=17.【解析】(1)证明BF=CD,而∠BFG=∠DCG,∠BGF=∠DGC,则△BFG≌△DCG(AAS);(2)证明OM是△ABC的中位线,进而在Rt△BEF中,利用勾股定理求解即可;(3)证明∠ACP=∠BCP=45°,在Rt△CBN中,CN=BN=BC=12,而∠CAB=∠CPB,则tan∠CAB=tan∠CPB,即可求解.此题属于圆的综合题,涉及了全等三角形的判定与性质、三角函数值的知识,综合性较强,解答本题需要我们熟练各部分的内容,对学生的综合能力要求较高,一定要注意将所学知识贯穿起来.26.【答案】解:(1)设甲工厂生产x万片口罩,则乙工厂生产(2000-x)万片口罩,由题意得:0.6x≤0.8(2000-x)×,解得:x≤1000.答:甲工厂最多可生产1000万片的口罩.(2)由题意得:(6-0.5m)(0.8+0.2m)=6×0.8+1.6,整理得:m2-8m+16=0.解得:m1=m2=4.答:m的值为4.【解析】(1)设甲工厂生产x万片口罩,则乙工厂生产(2000-x)万片口罩,由题意得关于x的一元一次不等式,求解即可;(2)根据乙工厂实际每天生产的口罩数量乘以每万片的实际成本等于乙工厂实际每天生产口罩的成本,列出关于m的一元二次方程,求解即可.本题考查了一元一次不等式和一元二次方程在实际问题中的应用,理清题中的数量关系正确列出不等式或方程是解题的关键.27.【答案】(1)解:四边形AEDF的形状是菱形;理由如下:∵DE∥AC,DF∥AB,∴四边形AEDF是平行四边形,∵AD平分∠BAC,∴∠EAD=∠FAD,∵DE∥AC,∴∠EDA=∠FAD,∴∠EAD=∠EDA,∴AE=DE,∴四边形AEDF是菱形;(2)(i)解:连接EF交AD于点Q,如图2所示:∵∠BAC=60°,四边形AEDF是菱形,∴∠EAD=30°,AD、EF相互垂直平分,△AEF是等边三角形,∴∠EAF=∠AEF=∠AFE=60°,∵AD=4,∴AQ=2,在Rt△AQE中,cos∠EAQ=,即cos30°=,∴AE===4,∴AE=AF=EF=4,在△AEG和△EFH中,,∴△AEG≌△EFH(SAS),∴∠AEG=∠EFH,∴∠ENH=∠EFH+∠GEF=∠AEG+∠GEF=60°,∴∠ENH=∠EAG,∵∠AEG=∠NEH,∴△AEG∽△NEH,∴=,∴EN•EG=EH•AE=3×4=12;(ii)证明:如图3,连接FM',∵DE∥AC,∴∠AED=180°-∠BAC=120°,由(1)得:△EDF是等边三角形,∴DE=DF,∠EDF=∠FED=∠EFD=60°,由旋转的性质得:∠MDM'=60°,DM=DM',∴∠EDM=∠FDM',在△EDM和△FDM'中,,∴△EDM≌△FDM'(SAS),∴∠MED=∠DFM',由(i)知,∠AEG=∠EFH,∴∠DFM'+∠EFH=∠MED+∠AEG=∠AED=120°,∴∠HFM'=∠DFM'+∠HFE+∠EFD=120°+60°=180°,∴H,F,M′三点在同一条直线上.【解析】(1)先证四边形AEDF是平行四边形,再证AE=DE,即可得出四边形AEDF 是菱形;(2)(i)连接EF交AD于点Q,证△AEG≌△EFH(SAS),得出∠AEG=∠EFH,证∠ENH=∠EAG,证明△AEG∽△NEH,得出=,即可得出结论;(ii)连接FM',证△EDM≌△FDM',得出∠MED=∠DFM',由(i)知,∠AEG=∠EFH,得出∠DFM'+∠EFH=∠MED+∠AEG=∠AED=120°,证出∠HFM'=∠DFM'+∠HFE+∠EFD=180°,即可得出结论.本题是三角形综合题目,考查了全等三角形的判定与性质、相似三角形的判定与性质、等边三角形的判定与性质、旋转的性质、平行四边形的判定与性质、菱形的判定与性质、直角三角形的性质、解直角三角形等知识;本题综合性强,熟练掌握等边三角形的判定与性质,证明三角形全等和三角形相似是解题的关键.28.【答案】解:(1)∵抛物线y=-x2+bx+c经过点A(4,3),对称轴是直线x=2,∴,解得:,∴抛物线的函数表达式为:y=-x2+x+3,∵y=-x2+x+3=-(x-2)2+4,∴顶点B的坐标为(2,4);(2)(i)∵y=-x2+x+3,∴x=0时,y=3,则C点的坐标为(0,3),∵A(4,3),∴AC∥OD,∵AD⊥x,∴四边形ACOD是矩形,设点E的坐标为(m,3),直线BE的函数表达式为:y=kx+n,直线BE交x轴于点M,如图1所示:则,解得:,∴直线BE的函数表达式为:y=x+,令y=x+=0,则x=4m-6,∴点M的坐标为(4m-6,0),∵直线BE将四边形ACOD分成面积比为1:3的两部分,∴点M在线段OD上,点M不与点O重合,∵C(0,3),A(4,3),M(4m-6,0),E(m,3),∴OC=3,AC=4,OM=4m-6,CE=m,∴S矩形ACOD=OC•AC=3×4=12,S梯形ECOM=(OM+EC)•OC=(4m-6+m)×3=,分两种情况:①=,即=,解得:m=,∴点E的坐标为:(,3);②=,即=,解得:m=,∴点E的坐标为:(,3);综上所述,点E的坐标为:(,3)或(,3);(ii)存在点G落在y轴上的同时点F恰好落在抛物线上;理由如下:由题意得:满足条件的矩形DEFG在直线AC的下方,过点F作FN⊥AC于N,则NF∥CG,如图2所示:设点F的坐标为:(a,-a2+a+3),则NF=3-(-a2+a+3)=a2-a,NC=-a,∵四边形DEFG与四边形ACOD都是矩形,∴∠DAE=∠DEF=∠N=90°,EF=DG,EF∥DG,AC∥OD,∴∠NEF=∠ODG,∠EMC=∠DGO,∵NF∥CG,∴∠EMC=∠EFN,∴∠EFN=∠DGO,在△EFN和△DGO中,,∴△EFN≌△DGO(ASA),∴NE=OD=AC=4,∴AC-CE=NE-CE,即AE=NC=-a,∵∠DAE=∠DEF=∠N=90°,∴∠NEF+∠EFN=90°,∠NEF+∠DEA=90°,∴∠EFN=∠DEA,∴△ENF∽△DAE,∴=,即=,整理得:a2+a=0,解得:a=-或0,当a=0时,点E与点A重合,∴a=0舍去,∴AE=NC=-a=,∴当点G落在y轴上的同时点F恰好落在抛物线上,此时AE的长为.【解析】(1)由题意得出,解得,得出抛物线的函数表达式为:y=-x2+x+3=-(x-2)2+4,即可得出顶点B的坐标为(2,4);(2)(i)求出C(0,3),设点E的坐标为(m,3),求出直线BE的函数表达式为:y=x+,则点M的坐标为(4m-6,0),由题意得出OC=3,AC=4,OM=4m-6,CE=m,则S矩形ACOD=12,S梯形ECOM=,分两种情况求出m的值即可;(ii)过点F作FN⊥AC于N,则NF∥CG,设点F的坐标为:(a,-a2+a+3),则NF=3-(-a2+a+3)=a2-a,NC=-a,证△EFN≌△DGO(ASA),得出NE=OD=AC=4,则AE=NC=-a,证△ENF∽△DAE,得出=,求出a=-或0,当a=0时,点E与点A重合,舍去,得出AE=NC=-a=,即可得出结论.本题是二次函数综合题目,考查了二次函数解析式的求法、二次函数的性质、一次函数解析式的求法、坐标与图形性质、矩形的判定与性质、全等三角形的判定与性质、相似三角形的判定与性质、梯形面积公式等知识;本题综合性强,属于中考压轴题型.。

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编:完成对话

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编:完成对话

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编完成对话四川省成都市武侯区2022年九年级二诊英语七、填写适当的单词补全对话A—Alice Wang B—BobA: Bob, our graduation ceremony is coming. What will you do for it?B: I want to thank my parents, teachers and classmates with a ___51___ named “I remember”. Ms. Li helped me ___52___ mine in class.A: I remember that class clearly. I had trouble in English poem writing.B : So did I. I ___53___ wanted to give up at first in class, but Ms. Li encouraged me. She helped me know it was hard work, but well worth the ___54___. Now I know how to write and rhyme. A: You’ve done well.B: What do you want to do?A: I want to buy some gifts for my classmates. Gifts are a great way of showing how much we care about them. And the ___55___ is giving them something they like.B: You’re right. We’d better know their favorites then find the gifts that ___56___ those interests. For example, if they love books, we should learn about their favorite styles and writers.A: Yes, and I think gifts need to be a ___57___. Don’t ask them what they want.B: I think so.A: Then, what am I supposed to buy for John? I don’t know him well but he called the nurse for help when I got hit on my head.B: Goo d boy! Gifts don’t always have to be material things. People often remember special___58___ that they don’t expect more than objects.A: Oh! I have a ___59___ talent, Piying performance. None of you know it. Haha!B: Cool! I know it’s an old folk art.A: My grandfather is a Piying ____60____ in Langzhong. He passed it down to me. I will give a show about Hua Mulan for John, you and other classmates.B: Good idea!七、填写适当的单词补全对话A: Hi, Bob. What did you do last weekend?B: Hi, Amy. I went to Sanxingdui. It drew the world’s attention on March 20th, 2021. Chinese archaeologists (考古学家)____51____ that they had found more than 500 cultural relics (文物) in six pits (坑), which ____52____ back over 3200 years. The relics include bronze-ware, gold and bronze masks and ivory.A: Wow, so amazing! Anything more about it?B: ____53____ 12 square kilometers, Sanxingdui, which was first discovered ____54____ by local farmers in 1929, is located in Guanghan, about 60 kilometers from Chengdu. It’s bel ieved to be the ____55____ of the ancient Shu Kingdom. The kingdom was a center of civilization (文明) along the Yangtze River.A: I think the new discoveries will help to better ____56____ many unexplained findings of Sanxingdui culture.B: Yes, it’s good t o know ancient China. The new discoveries are similar to ____57____ found in 1986, as they also included bronze masks and metal trees.A: What were they used for?B: For sacrifice (祭祀). They also raise an important question about the ____58____ of Chinese civilization. The ancient Shu civilization of Sanxingdui is regarded to be one of the earliest examples of Chinese civilization.A: Is it one of the birthplaces of Chinese civilization?B: Yes. These new discoveries show Sanxingdui had a ____59____ connection with Liangzhu Culture in Zhejiang province which has a history of 4,300 years to 5,300 years.A: That’s very long. There are still many _____60_____ areas in the ancient Chinese history and we have a long way to know our colorful culture.十二、填写适当的单词补全对话A: Hi, Li Jun. How do you feel back to school after a long special vacation?B: Hi, Wang Yao. Just fine. Because of COVID-19(新冠肺炎), we had to study online instead of having classes at school. However, online learning has its weaknesses ___80___ to face-to-face learning. They are different.A: Well. Every coin has two sides. I like online learning because I had more freedom at home. I could make ___81___ use of my time in class and asked teachers questions online. During every ___82___, I might play the piano or listen to music.B: You really had a happy life at home during COVID-19. I’d like to tell you some changeable habits. As we know, traditionally, people in Iran (伊朗) shake hands to greet with one ___83___. But today, to stop COVID-19 from ___84___, people there begin to greet by footshake instead of shaking hands.A: Sounds interesting. In China, the government took strict controls and advised people not to go out ___85___it was necessary.B: Do you want to know what ___86___ me most.A: Hmm... You’re interested in medicine and want to be a ___87___. So it must be about them. B: You’re right. Without COVID-19, I couldn’t know the doctor, Zhong Nanshan. He is so responsible for the society. Although he is already 84, he makes his ___88___ to fight.A: I agree with you. What’s more, the rapid speed to build more hospitals ____89____ many people.B: We are quite proud.答案:四川省成都市武侯区2022年九年级二诊英语51.poem 52.polish##rewrite##improve 53.even##truly##really 54.effort 55.best 56.reflect##match##meet 57.surprise 58.experiences##moments 59.secret 60.arti st##performer【导语】本文中Alice Wang 和Bob谈论了毕业典礼上各自的打算。

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编:阅读表达

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编:阅读表达

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编阅读表达四川省成都市武侯区2022年九年级二诊英语九、阅读还原6选5补全短文根据短文内容,从短文后的A~F选项中,选出5个适当的选项补全短文。

Chinese traditional painting and dance are two important parts of the art world. ___71___ This year, a dance drama The Journey of a Legendary Landscape Painting was on CCTV’s Spring Festival Gala and became a hot topic. Millions of people have been proud of it. ___72___ This poetic dance program was from the 900-year-old Chinese painting A Panorama of Rivers and Mountains, created by Song Dynasty painter Wang Ximeng at about 18.___73___ They each had a different hairstyle, which was similar to a mountain rock. The clothes they wore were green and blue, which is also a poetic interpretation (演绎) of the mountains and rivers. When the dancers swung, audiences (观众) seemed to be looking at the moving mountains and rivers.It brings people a great experience of beauty. It is not only a drama but also a show.___74___ More than a thousand years later, green mountains and rivers still wow people as they did long ago.In fact, in recent years, more and more modern performances highlight (突出) Chinese traditional culture and have received warm welcome. ___75___ The younger have grown up with the feeling of pride in it.A.Mountains and rivers are coming to life.B.But what about when they meet each other?C.The leading dancer practiced hard for the performance.D.It is b ecause of people’s great love for traditional culture.E.The dancers were thought as the mountains in the performance.F.Some people even look forward to watching the dance again in the theaters later.十、阅读填表根据短文内容,完成图表中所缺信息。

2020年四川省成都市武侯区中考化学二诊试卷

2020年四川省成都市武侯区中考化学二诊试卷
第 4页(共 30页)
A.FeCl3 与 Cu 发生的反应属于置换反应 B.M 点溶液中一定含有 FeCl2 和 CuCl2 C.加入 V1mL FeCl3,溶液时,Fe 恰好完全反应 D.混合物中铁粉与铜粉的质量比为 m:n
二、(本题包括 2 个小题,共 19 分)
15.(7 分)建设湿地公园,打造森林公园城市是成都城市建设的目标之一。回答下列问题:
三种固体

C
验证稀硫酸能与烧碱溶液发 使用石蕊试液,观察颜色变
生反应

D
除去 CO2 中混有的少量 CO
在氧气流中点燃
A.A
B.B
C.C
D.D
13.(3 分)某温度下,称取不同质量的无水固体 M、N 溶解在一定质量的水中,分别形成
饱和溶液(固体均不与水反应)。其中水的质量 x 与所溶解固体质量 y 的关系如图中直线
2.(3 分)下列实验仪器所用的材料属于合成材料的是( )
A.烧杯
B.铁架台
C.塑料药匙
D.蒸发皿
3.(3 分)下列对相关实验现象的描述,错误的是( )
A.硫在氧气中燃烧,发出蓝紫色火焰
B.细铁丝在空气中剧烈燃烧,火星四射
C.铜丝插入硝酸银溶液中,析出银白色固体
D.氯化铁溶液中滴加烧碱溶液,产生红褐色沉淀
酞);②食品包装袋中的干燥剂(主要成分为生石灰);③白醋(主要成分为醋酸,化学
式为 HAc,化学性质与盐酸相似),进行了如下实验。
【实验一】
(1)取①②两种固体少量,小心研细,分别放入 A、B 两个玻璃杯中,加入一定量的
水并用筷子搅拌,观察到玻璃杯中均出现浑浊现象;用手触摸杯壁,B 中发热,其原因
是(用化学方程式表示)

成都市武侯区2020年九年级第二次诊断性检测试题物理

成都市武侯区2020年九年级第二次诊断性检测试题物理

成都市武侯区2020年九年级第二次诊断性检测试题物理注意事项:1.全卷分为A卷和B卷两部分,A卷满分100分,B卷满分20分;考试时间90分钟。

2.考生使用答题卡作答。

3.在作答前,考生务必将自己的姓名、考生号和座位号填写在答题卡规定的地方。

考试结束,监考人员只将答题卡收回。

4.选择题部分请使用2B铅笔填涂;非选择题部分请使用0.5毫米黑色的签字笔书写,字体工整、笔迹清楚。

5,请按照题号在答题卡上各题目对应的答题区域内作答,超出答题区域书写的答案无效;乙丙在草稿纸、试卷上答题无效。

6.保持答题卡清洁,不得折叠、污染、破损等。

A卷(共100分)第I卷(单项选择题,共30分)一、单项选择题(每小题只有一个选项符合题目要求,每小题2分,共30分)1.下列估测数据,符合生活实际的是A.人体正常体温约为37℃B.人的步行速度约为10 sC.一个鸡蛋的质量约为250g D.一台空调额定功率是50W2.中国高铁、移动支付、共享单车、“蛟龙号"潜水器……当今中国,科技进步使生活更加便捷。

下列说法中正确的是A.“复兴"号高速列车因为速度很大所以惯性很大B.“蛟龙号"潜水器在海面下下潜过程中受到的浮力逐渐增大C.共享单车坐垫设计得较宽,目的是为了增大压强D.用手机进行移动支付时,利用了电磁波传递信息3生活中有许多光现象,下列说法中正确的是A.凸透镜所成的实像一定是放大的B.黑板反光是由光的镜面反射引起的C.远视眼可用凹透镜制成的眼镜来矫正D.汽车夜间行驶时,应打开驾驶室内照明灯4.关于核能、地热能、潮汐能的说法,正确的是A.核燃料、地热能和潮汐能等都是可再生能源B.核能是清洁型能源,对人类不会造成任何危害C.目前核电站获得核能的途径是核裂变的可控链式反应D.地球上的核能、地热能和潮汐能都是来自太阳5.如图1所示,将悬挂的乒乓球轻轻接触正在发声的音叉,乒乓球多次被弹开,关于此实验,下列说法中错误的是A.音叉发出声音的音调越高,乒乓球被弹开得越远B.音叉发出声音的响度越大,乒乓球被弹开得越远C.本实验可以证明声音是由于物体的振动而产生的D.乒乓球被弹开的越远,说明音叉振动幅度越大6.甲、乙两列火车并排停在站台上,小强坐在甲车中向乙车观望,突然,他觉得自己的列车开始缓缓地前进了,但是,“驶过"了乙车的车尾才发现,实际上他乘坐的列车还停在站台上。

2020年成都武侯区英语九年级二诊试卷(无听力,有答案)

2020年成都武侯区英语九年级二诊试卷(无听力,有答案)

2020年成都武侯区九年级英语二诊试卷第二部分基础知识运用( 共30小题;计40分)六、选择填空(共15小题;计20分)A.从以下各题的A、B、C三个选项中选择正确答案。

(共10小题;每小题1分,计I0分)31. We grow lots of beautiful flowers in the____. You can go outside and pick some.A. restaurantB. museumC. garden32.--Did you hear the noise just now? What was that?--Yes. It _____be a cat. But I'm not sure.A. can'tB. mightC. must33. Mike, your grandpa is ill. I'm busy. Please help your mother to look after _______.A. meB. herC. him34. --Could you tell me_______ every day?--Certainly. For about 40 minutes.A.how long you exerciseB. how often you do choresC. how you get to school35. Mr.Wang decided ______his free tine helping his friend as soon as possible.A. to spendB. spendingC. spend36. My sister is playing with her toys while I_____ the living room. It is peaceful.A. am cleaningB. was cleaningC. clean37. The new library ______half a year ago. There are great changes in our town.A. is builtB. was builtC. will be built38. Laura has been more _______and she likes talking with people in our town.A. Serious C. outgoing C. careful39. --last Sunday was Mother's Day. What was your surprise for her ?--The first thing _____I did was to make a card for her.A. whoB. whoseC. that40. Many doctors and nurses went to Wuhan to save the sick people ______it was really dangerous.A. thoughB. soC. orB.补全对话根据对话内容,从方框中选出适当的选项补全对话,井将选项的编号填在横线上。

2020年四川省成都市武侯区中考化学二诊试卷(含答案解析)

2020年四川省成都市武侯区中考化学二诊试卷(含答案解析)

2020年四川省成都市武侯区中考化学二诊试卷一、单选题(本大题共14小题,共42.0分)1.化学推动了社会的进步,使我们的生活绚丽多彩.下列事实中发生化学变化的是()A. 将石油进行分馏B. 用海水晒盐C. 切割大理石作建筑材料D. 用压缩天然气作燃料驱动汽车2.善于归纳知识,有利于培养素质。

下列知识整理的内容不完全正确的一组是()A. AB. BC. CD. D3.对下列实验中的异常现象分析合理的是()A. 给量筒中的液体读数,读数小于液体实际体积--俯视读数B. 细铁丝在氧气中燃烧时,集气瓶炸裂--用于引燃的火柴过长C. 过滤液体时滤液浑浊--滤纸破损D. 用KMnO4制氧气并用排水法收集,结束时发生水倒吸--装置未做气密性检查4.下列与金属相关的说法正确的是()A. 生铁和钢的性能完全相同B. 炼铁过程只发生物理变化C. 铁器不能盛放酸性液体D. 常温下所有金属均为固态5.下列说法正确的是()A. 催化剂是一类能加快化学反应速率的物质B. 雨水因溶有空气中的二氧化碳而略显酸性,故称为酸雨C. 金刚石、石墨、C60都是碳单质D. 冰、干冰、可燃冰都是纯净物6.罐装液化石油气中含有丙烯(C3H6)、丁烯(C4H8)等成分。

下列说法中不正确的是()A. 丙烯、丁烯属于有机化合物B. 丁烯比丙烯多一个碳原子和两个氢原子C. 丙烯和丁烯中碳元素的质量分数相同D. 丙烯、丁烯中碳原子与氢原子的个数比均为1:27.如图所示为实验室制取二氧化碳的操作,其中错误的是()A. 检查气密性B. 制备气体C. 收集气体D. 验满气体8.下列实验方案合理的是()A. 按溶解、过滤、蒸发的操作顺序可以分离NaCl和KNO3的混合物B. 用铜丝、锌粒、银粉以及稀盐酸就可以辨别出铜、银、锌的活动性顺序C. 要除去氧化铜粉末中的少量炭粉,可采取在空气中加热的方法D. 做氢气还原氧化铜实验时为了节约氢气的用量,应先加热后通氢气9.下列现象说明分子在不断运动的是()A. 春天细雨纷飞B. 夏天柳枝飘扬C. 秋天桂花飘香D. 冬天雪花飘飘10.我国古代已经掌握制冰技术,往大小容器间的水溶液中加入硝石(主要成分是硝酸钾KNO3)可使小容器中的水结成冰。

2020年成都市武侯区初三下学期英语二诊试卷word版(含答案)

2020年成都市武侯区初三下学期英语二诊试卷word版(含答案)

2020年成都市武侯区初三下学期英语二诊试卷A 卷(共100分)第一部分听力测试(共30小题, 计30分)一、听句子, 根据所听到的内容选择正确的答案。

每小题读两遍。

(共5小题, 每小题1分;计5分)1. A. Yes, coffee, please. B. Yes, a hamburger, please. C. No, I'm not hungry.2. A. Month. B. Volleyball. C. History.3. A. Well done. B. Thank you. C. That’s OK.4. A. You’re welcome. B. Good idea. C. Here you are.5. A. I’d love to. B. Don’t worry. C. I agree.二、听句子, 选择与你听到的句子意思相符合的图片, 并将代表图片的字母填在相应的题号后。

每小题读两遍。

(共5小题, 每小题1分; 计5分)A B C D E6._________7._________8._________9._________ 10._________三、听对话, 根据对话内容及问题选择正确答案。

每段对话读两遍。

(共10小题, 每小题1分; 计10分)11. A. By bike. B. By bus. C. By car.12. A. Watching a movie. B. Waiting for a bus. C. Shopping.13. A. Two. B. Three. C. Four.14. A. Three times a week. B. Twice a week. C. Once a week.15. A. June 6th. B. June 13th. C. June 16th.16. A. He was fooled. B. It was a costume party. C. He preferred special costume.17. A. Tiring. B. Boring. C . Interesting.18. A. On a street. B. In a hospital. C. At school.19. A. At 11:00 p.m. B. At 1:00 a.m. C. At 6:00 a.m.20. A. Clean-up Day. B. The Water Festival . C. Chinese New Year.四、听短文, 根据短文内容选择正确答案。

四川省成都市武侯区2020年九年级第二次诊断性检测试题(无答案)

四川省成都市武侯区2020年九年级第二次诊断性检测试题(无答案)

成都市武侯区2020年九年级第二次诊断性检测试题全卷分为A卷和B卷两部分,A卷满分100分,B卷满分50分;考试时间120分钟。

A卷(共100分)第I卷(选择题,共24分)一、基础知识(每小题3分,共12分)1.下面加点字注音有误的一项是A.黎.明( lí)笑窝.(wō) 雕梁画栋.(dòng)B.灌溉. ( g ài) 喷薄.(bó) 喃.喃自语(nán)C.星宿. (sù) 真挚.(zhì) 一气呵.成(hē)D.绰.号( chuò) 礼聘.(pìn) 朝朝暮暮.(mù)2.下列语句中书写正确的一项是A.范进笑了一声道:“噫!好了!我中了!”说着,往后跌倒,牙关咬紧,不醒人事。

B.你站在桥上看风景,看风景的人在楼上看你。

明月妆饰了你的窗子,你妆饰了别人的梦。

C.李太白《送孟浩然之广陵》的诗句包含着朋友惜别的惆怅,使人联想到依依惜别的情景。

D.圆规很不平,显出鄙夷的神色,仿佛痴笑法国人不知道拿破仑,美国人不知道华盛顿似的。

3.下列语句中加点的成语使用有误的一项是()A.滴水穿石,告诉我们做事情应该持之以恒....,这是大自然带给我们的宝贵启示。

B.世界卫生组织称赞中国的各项防疫措施是行之有效....的,应该向全世界大力推广。

C.清明节,人们纷纷到陵园祭扫,缅怀先烈的丰功伟绩....,以此寄托对逝者的哀思。

D.随着疫情防控形势渐好,师生们满心喜悦地重返校园,在学习中共享天伦之乐....。

4.下列语句中没有语病的一项是( )A.省政府要求各地重视防火安全工作,切实做到早处置、早预警、早排查,确保群众安全。

B.由于一场突如其来的疫情,让全国学生熟悉并适应了“网课”这种居家学习的全新模式。

C.成都凭借自身良好的硬件条件和丰富的赛事经验,成功获得了 2021年世界大运会举办权。

D.武侯区教育局统一安排的优质在线课程,极大地激发了学生的学习兴趣和学习效率。

2020年成都武侯区英语九年级二诊试卷(无听力,有答案)

2020年成都武侯区英语九年级二诊试卷(无听力,有答案)

2020年成都武侯区英语九年级⼆诊试卷(⽆听⼒,有答案)2020年成都武侯区九年级英语⼆诊试卷第⼆部分基础知识运⽤( 共30⼩题;计40分)六、选择填空(共15⼩题;计20分)A.从以下各题的A、B、C三个选项中选择正确答案。

(共10⼩题;每⼩题1分,计I0分)31. We grow lots of beautiful flowers in the____. You can go outside and pick some.A. restaurantB. museumC. garden32.--Did you hear the noise just now? What was that?--Yes. It _____be a cat. But I'm not sure.A. can'tB. mightC. must33. Mike, your grandpa is ill. I'm busy. Please help your mother to look after _______.A. meB. herC. him34. --Could you tell me_______ every day?--Certainly. For about 40 minutes.A.how long you exerciseB. how often you do choresC. how you get to school35. Mr.Wang decided ______his free tine helping his friend as soon as possible.A. to spendB. spendingC. spend36. My sister is playing with her toys while I_____ the living room. It is peaceful.A. am cleaningB. was cleaningC. clean37. The new library ______half a year ago. There are great changes in our town.A. is builtB. was builtC. will be built38. Laura has been more _______and she likes talking with people in our town.A. Serious C. outgoing C. careful39. --last Sunday was Mother's Day. What was your surprise for her ?--The first thing _____I did was to make a card for her.A. whoB. whoseC. that40. Many doctors and nurses went to Wuhan to save the sick people ______it was really dangerous.A. thoughB. soC. orB.补全对话根据对话内容,从⽅框中选出适当的选项补全对话,井将选项的编号填在横线上。

2020年成都市武侯区九年级二诊试卷

2020年成都市武侯区九年级二诊试卷

2020年武侯区二诊试题A卷一、选择题(每题2分,共30分)1.下列估测数据,符合生活实际的是()A.人体正常体温约为37℃B.人的步行速度约为10m/sC.一个鸡置的质量约为250gD.一台空调额定功率是50W2.中国高铁、移动支付.共享单车、“蛟龙号”潜求器……当今中国,科技进步使生活更加便捷。

下列说法中正确的是()A.“复兴”号高速列车因为速度很大所以惯性很大B.“蛟龙号”潜水器在海面下下潜过程中受到的浮力逐渐增大C.共享单车坐垫设计得较宽,目的是为了增大压强D.用手机进行移动支付时,利用了电磁被传递信息3.生活中有许多光现象,下列说法中正确的是()A.凸透镜所成的实像一定是放大的B.黑板反光是由光的镜面反射引起的C.远视眼可用凹透镜制成的眼镜来矫正D.汽车夜间行驶时.应打开驾驶室内照明灯4.关于核能、地热能、潮沙能的说法,正确的是()A.核燃料、地热能和潮汐能等都是可再生能源B.核能是清洁型能源,对人类不会造成任何危害C.目前枝电站获得核能的途径是核裂变的可控链式反应D.地球上的核能、地热能和潮汐能都是来自太阳5.如图所示。

将悬挂的乒乓球轻轻接触正在发声的音叉,乒兵球多次被弹开.关于此实验,下列说法中错误的是()A.音叉发出声音的音调越高,乒乓球被弹开得越远B.音文发出声音的响度越大,乒乓球被弹开得越远C本实检可以证明声音是由于物体的振动而产生的D.乒乓球被弹开的越远,说明音叉振动幅度越大6.甲、乙两列火车并排停在站台上,小强坐在甲车中向乙车观望,突然,他觉得自己的列车开始缓缓地前进了,但是.“驶过”了乙车的车尾才发现,实际上他乘坐的列车还停在站台上。

下列说法中正确的是()A.小强感觉自己乘坐的列车前进了是以站台为参照物B.小强先后有不同的感觉,是因为他选择的参照物不同而造成的C.小强发现自己乘坐的列车还停在站台上是以乙车的车尾为参照物D.小强发现自己乘尘的列车还停在站台上是以乙车上的乘容为参照物7.如图所示的实例中。

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编:短文填空

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编:短文填空

四川省成都市武侯区2020-2022年(三年)九年级下学期英语二诊试卷分类汇编短文填空四川省成都市武侯区2022年九年级二诊英语八、短文选词填空从下面方框中选出10个单词,将其正确形式填入短文,使短文意思正确通顺(每词限用一次)。

because deep encourage include little physicalpress spread stand three usual whileBaduanjin isbroken down into eight sections. There are different names for each of the movements. For example, the first movement is called “Support the sky by putting something under it”, and it is also called “___61___ the sky with two hands”. You need to continue raising your hands overhead and rise up on your feet. The movements are ___62___ exercises which can help you improve health and feel ___63___ stressed.These days, a video of children playing baduanjin is going online. It was created by a group of ___64___ graders at a primary school in Shanghai as a result of project-based learning. The video was produced on the topic of health care in auturnn. A teacher says it has been a long traditi on for their school to encourage students to learn about the world on the theme they’ve chosen by themselves. Most students chose dishes and desserts they usually have in auturnn,___65___ this group decided to learn baduanjin and share it with their classmates, as it has become popular exercise in workplaces, ___66___ some of their parents offices. The video was praised by the students and parents who ___67___ it on their WeChat. Such programs are not___68___ homework that can be done in one day with knowledge of subjects but require students to think ___69___, do research, work with others and present their findings with different skills.This can not only help with the independence in study but also improve the ability to work in groups. Students are ____70____ to discover problems in real life and find solutions.四川省成都市武侯区2021年九年级二诊英语八、短文选词填空because, clear, confident, create, encourage, get, good, impress, process, student, task, unless Do you want to sturdy abroad? It has become a choice for more students in recent years. So what is it like? Here’s some experience I can share with you.Studying abroad can open up____61____ eyes. It is so exciting to learn different languages and experience different customs. Experiencing a different educational system is also very interesting. This helps you see the world in a different way. As the saying goes, “It is ____62____ to travel ten thousand miles than to read ten thousand books.”The educational experience ____63____ me a lot. I found myself fully in an English language environment. At first, it was hard ____64____ a clear understanding of all the information in classes. I found that teachers and students would have lots of discussions in class. Students ____65____ to express their opinions during lectures, ____66____ an open dialog between the teacher and the class. Teachers would ask us to do many role-play exercises in class. The exercises were a lot of fun and helped me understand the knowledge our teachers were explaining ____67____.Studying abroad is not just about studying. It also gives the chances to learn valuable life lessons and helps develop independence. For example, ____68____ students could not stay in the dormitory (宿舍) for the second year, I had to move out. I went through the ____69____ of looking for a place to stay, meeting with the building manager and ordering all of the services I needed to move. This experience gave me a lot of _____70_____ because I could deal with problems in a foreign country on my own. And it has helped me continue to be more independent.四川省成都市武侯区20201年九年级二诊英语十三、短文汉语提示填空add; complete; do; her; himself; inspiration;instruction; invite; know; silent; value; whomA few days ago, Bruce was back home from work and found some writing on the low wall of a house he was walking by. It said, “Happiness is not something you experience; it’s something you remember.” He was terrible that d ay and reading it brightened his day a bit. Standing in___90___ for a while, he also wrote one of his favorite sayings down.The next day Bruce passed by the wall again, he noticed a new saying beside his in the handwriting as the first one. He___91___ a new one. And they kept “communicating” this way for a long time.One day, he was writing on the wall and the old lady ___92___ is an unfriendly neighbor and the owner of the house saw him. She stepped out. Bruce was afraid and ran away at once. She glanced(瞥一眼) at him and then read the words on the wall. Without saying anything to him, she said something to ___93___ and then moved back inside slowly. Bruce was a little worried for a whole, afraid to go back to the wall, but when he ___94___, he found two words in ___95___ different handwriting, “Thank you.” Two days later, Bruce saw the old lady sitting in her yard. Warmly, she greeted Bruce and told him how these words had ___96___ her and how she was thankful to see the young still stick to some ___97___ rules.“We become friends now and I have often been ___98___ to her house for a cup of tea.” said Bruce, “This experience has changed my life. Maybe I will never know who wrote that very first saying, but if he is out there, I’ll say “thanks” to that _____99_____ friend.”答案:四川省成都市武侯区2022年九年级二诊英语61.press 62.physical 63.less 64.third 65.while 66.including 67.spread 68.usual 69.deeply 70.encouraged【导语】本文是一篇记叙文。

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编:完形填空

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编:完形填空

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编完形填空四川省成都市武侯区2022年九年级二诊英语三、完形填空When we think of flying taxis, we usually picture scenes from ___16___. Well, here’s a real one. In Moscow, a company (公司)recently tested a flying taxi. It is a drone (无人机). It flies in the sky by ___17___ with two persons!The taxi can carry people and things. It can fly at 200 km an hour. That’s much faster than a car. The taxi weighs 300 kg and can fly as ___18___ as 100 km above the ground, according to Sputnik News.The company plans to put its flying taxis into use in 2025. Passengers will order flying taxis through an app on their phones. When the taxi comes, they can choose ___19___ they want to go on touchscreens. There is no pilot in the drone. But some people on the ground will be watching it. They will make sure the trip is ___20___.16.A.dramas B.action movies C.science fiction movies 17.A.themselves B.ourselves C.itself18.A.away B.high C.quickly19.A.where B.why C.who20.A.safe B.cheap C.quietOnce a man had a dream in which his hands, feet, mouth and brain all began to fight against his stomach. “You good-for-nothing stomach!” The hands said. “We work all day long, ___21___ and carrying things. By evening we’re covered with ___22___ and dirt. And you just sit there,___23___ all the food.” “We agree!” Cried the ___24___, “You are becoming too heavy for us to carry. Think how ___25___ we get, walking all day long. And you just eat all day.” “That’s right!” Shouted the mouth. “Where do you think all that food you love comes from? You take it all for yourself ___26___ I’m finished. Do you call that fair?” “And what about me?” Called the brain. “Do you think it’s easy to think about where your next ___27___ will come from?” So one by one the parts of the body joined in fighting against the stomach, which said ___28___ at all. “I have an idea,” the brain said, “Let’s all ___29___ working fo r the lazy stomach.” And all the other body parts agreed.At first the stomach shouted back and made a ____30____, as it always did when it was hungry. But after a while it was quiet. Then the dreaming man found he could not walk and even began to feel pre tty ill. When he felt worse and worse, he thought, “This fight had better not last much longer, or I’ll die.”21.A.walking B.lifting C.eating22.A.cuts B.clothes C.food23.A.cooking B.enjoying C.sharing24.A.mouth B.hands C.feet25.A.normal B.excited C.sore26.A.as soon as B.even though C.so that27.A.problem B.meal C.part 28.A.something B.everything C.nothing29.A.give up B.have fun C.think30.A.promise B.mistake C.noise四川省成都市武侯区2021年九年级二诊英语三、完形填空Long long ago, there were no donkeys in an ancient Chinese place named Qian. But some people always wanted to ___16___ things, so one such man brought a donkey to Qian by boat. However, he found the donkey ___17___ there so he set it free in the hills.Soon after, a tiger saw the strange animal. He hid behind the trees to ___18___ it carefully. Suddenly he heard the most terrible noise, “Heehaw! Heehaw!” He was so afraid that he ran back to his house and hid.After a while the tiger felt great ___19___. “I’m a tiger! I should not be afraid of any animal!” So he went back. When the donkey saw the tiger behind it, it began to kick hard with its ___20___ legs and hurt the tiger badly. But the tiger noticed the noisy animal only kicked behind. So the tiger jumped on it from the side and ate the donkey. This story tells we sometimes need more than one skill to win.16.A.make B.change C.invent 17.A.interesting B.right C.useless18.A.study B.eat C.hear19.A.free B.shame C.scared20.A.four B.front C.backSitting in the park, I could see two ___21___ racing on their skateboards. The one in front was laughing and asking the other to go ___22___. The one behind seemed angry and he was trying hard to follow his elder brother.It made me think of myself as a boy. I was always ___23___ with my elder brother. He was better than me at everything. I tried hard to beat him but I never could. I told myself that one day I would do it-and I would feel ___24___.Then came the evening of my first victory over George. We had our final exam results and___25___ were excellent. At dinner I wanted to show them proudly to my ___26___, but I waited for my brother to speak first. ___27___, he didn’t say a word. He didn’t look at us. He just___28___ a little bit and then went to his room.Then an idea h it me. George had failed his exams! I was better than George! But I didn’t feel happy or proud. I only felt sorry for my poor brother. ___29___ was not sweet.I found George in his room, crying silently. I put my arms around him and said: “Don’t worry.I s till believe in you. You are the best.” He put his arms around me. “No, you’re the best. The best brother in the world!”I looked again at the boys and smiled to myself. Yes, they are competing now, but they will ___30___: having a brother is better than winning a race.21.A.sons B.sisters C.brothers22.A.away B.fast C.slowly 23.A.laughing B.racing C.competing 24.A.good B.bad C.interesting25.A.his B.mine C.ours 26.A.classmates B.teachers C.parents27.A.Luckily B.Strangely C.Traditionally 28.A.ate B.cried C.talked29.A.Candy B.Dinner C.Victory30.A.lose B.learn C.wait四川省成都市武侯区20201年九年级二诊英语八、完形填空If you decide to wear medical masks(口罩) like this one, it is important to wear and throw it away correctly. If you don’t do that, ___45___ protecting you, the mask might hurt you since the germs(细菌) may stay on it.To wear it correctly, you should put the metal strip at the___46___ of the mask, place it over your nose bridge and tie the elastic around your ears or behind your head. Make sure themask___47___ your nose, mouth and face.After taking away the mask and throwing it in a closed bin, clean your___48___ with soapand water. Hand cleaning should also be done if you accidentally touch the front of your mask while wearing it. If your mask becomes ___49___ as you need to breathe, replace it a new dry one.45.A.in order for B.instead of C.because of 46.A.bottom B.back C.top47.A.covers B.beats C.touches48.A.hands B.face C.hair49.A.warm B.cold C.wetHenry is going through a very hard time. His wife is just dead. He feels that life is ___50___ without her. For months, Henry sits in his house doing nothing.Henry’s ___51___, an old woman named Lisa, sees him from her yard one day. She has not seen him ___52___ for days! She asks him to come closer to the fence(栅栏) next to her house.“Hello, Henry! Just look at this fence. It is falling apart. You are strong. Can you help me___53___ this fence?” Lisa asks.Henry is angry. He is the one who needs help right now. He thinks the old lady is kind of___54___. But he knows she’s too old to do that herself. So he agrees.Henry works on the fence for days. When he finishes, she thanks him. Henry smiles for the first time during ___55___.“What a wonderful job! Could you please paint it for me?” Lisa says to him.Henry cannot ___56___ she is asking for more help. But because he respects(尊重) her, he doesn’t refuse. He works hard in the hot sun. As their neighbors passes by, they all tell Henry it is a beautiful job. Henry feels very ___57___.Henry no longer feels that life is boring. He ___58___ understands Lisa was kind. She knows that staying busy can help him forget his sadness. He helped her, but she truly ___59___ him. 50.A.hopeful B.meaningless C.fearless51.A.friend B.boss C.neighbor52.A.at school B.outside C.in his office53.A.fix up B.look after C.give away54.A.shy B.exciting C.impolite55.A.hours B.months C.years56.A.agree B.believe C.realize57.A.happy B.busy C.tired58.A.finally B.painfully C.seriously 59.A.honored B.saved C.thanked答案:四川省成都市武侯区2022年九年级二诊英语16.C 17.C 18.B 19.A 20.A【导语】本文是一篇说明文。

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编:首字母填空

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编:首字母填空

四川省成都市武侯区2020-2022年中考二诊英语试题分类汇编首字母填空四川省成都市武侯区2022年九年级二诊英语六、根据首字母填空46.Team China’s a________ with 9 golds at the Beijing Winter Olympics made us Chinese excited and proud.47.I think brave and energetic Monkey King is the l________ character in Journey to the West. 48.To avoid r________ the same mistakes, we should summarize what we’ve learned.49.We should v________ the present. Life at present, good or bad, is something we should care for because it’s life.50.Missing boy, Sun Zhuo, finally hugged his parents in Shenzhen after they were s________ from each other. It was really moving.四川省成都市武侯区2021年九年级二诊英语六、根据首字母填空46.The unbelievable number of Chinese travelers during the Qingming Festival shows a cleari________ of China’s tourism.47.The movie, Hi, mom, r________ a fact that mom knows best and loves her kid most. 48.David got dressed in a hurry and wore his T-shirt inside out. It made him so e________ when we saw him.49.Respecting our c________ in games means respecting ourselves. It’s also a kind of sports spirit.50.On April 12th, we made it in P. E. exam. We are t________ for our teacher’s clear instructions during P. E. class.四川省成都市武侯区20201年九年级二诊英语十一、根据首字母填空75.When we see someone in trouble, we’re s__________ to give him a hand.76.In Liangshan this April, many h__________, like firefighters and helpers, were brave enough to fight a forest fire.77.I hope to keep the old post cards because they bring back sweet m__________. 78.Students usually c__________ the mountains to the school before the road was built. 79.Many apps for take away food are w__________ used and more than 400 million people called for takeouts in 2019.答案:四川省成都市武侯区2022年九年级二诊英语46.(a)thletes【详解】句意:中国代表团的运动员在北京冬奥会上获得9枚金牌,这让我们中国人感到兴奋和自豪。

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2020年武侯区二诊试题A卷一、选择题(每题2分,共30分)1.下列估测数据,符合生活实际的是()A.人体正常体温约为37℃B.人的步行速度约为10m/sC.一个鸡置的质量约为250gD.一台空调额定功率是50W2.中国高铁、移动支付.共享单车、“蛟龙号”潜求器……当今中国,科技进步使生活更加便捷。

下列说法中正确的是()A.“复兴”号高速列车因为速度很大所以惯性很大B.“蛟龙号”潜水器在海面下下潜过程中受到的浮力逐渐增大C.共享单车坐垫设计得较宽,目的是为了增大压强D.用手机进行移动支付时,利用了电磁被传递信息3.生活中有许多光现象,下列说法中正确的是()A.凸透镜所成的实像一定是放大的B.黑板反光是由光的镜面反射引起的C.远视眼可用凹透镜制成的眼镜来矫正D.汽车夜间行驶时.应打开驾驶室内照明灯4.关于核能、地热能、潮沙能的说法,正确的是()A.核燃料、地热能和潮汐能等都是可再生能源B.核能是清洁型能源,对人类不会造成任何危害C.目前枝电站获得核能的途径是核裂变的可控链式反应D.地球上的核能、地热能和潮汐能都是来自太阳5.如图所示。

将悬挂的乒乓球轻轻接触正在发声的音叉,乒兵球多次被弹开.关于此实验,下列说法中错误的是()A.音叉发出声音的音调越高,乒乓球被弹开得越远B.音文发出声音的响度越大,乒乓球被弹开得越远C本实检可以证明声音是由于物体的振动而产生的D.乒乓球被弹开的越远,说明音叉振动幅度越大6.甲、乙两列火车并排停在站台上,小强坐在甲车中向乙车观望,突然,他觉得自己的列车开始缓缓地前进了,但是.“驶过”了乙车的车尾才发现,实际上他乘坐的列车还停在站台上。

下列说法中正确的是()A.小强感觉自己乘坐的列车前进了是以站台为参照物B.小强先后有不同的感觉,是因为他选择的参照物不同而造成的C.小强发现自己乘坐的列车还停在站台上是以乙车的车尾为参照物D.小强发现自己乘尘的列车还停在站台上是以乙车上的乘容为参照物7.如图所示的实例中。

关于摩擦或压强的应用,下列说法中错误的是()A.甲图中给自行车后轴滴加机油,是为了减小摩擦B.乙图中自行车的刹车装置,是通过增大压力来增大摩擦C丙图中吸管端切成斜口,是通过增大压力来增大压强D.丁图中起重机履带与地面接触,是通过增大受力面积来减小压强8.春秋战国时期,在华夏大地上就出现了有关吸铁磁石的记载。

我国古代把“磁石”写作“慈石”,意思就是“石,铁之母也。

以有慈石,故能引其子”。

下列关于磁现象的认识中,表述正确的是()A.磁体能吸引铁、铜、钴等物质B.同名磁极相互吸引,异名磁极相互排斥C.磁体之间只有相互接触时才能产生相互作用D.磁体间的相互作用是通过磁场发生的9.下列有关热现象的说法中,正确的是()A.单缸四冲程内燃机的转速为2400R/min,则每秒钟对外做功20次B.形成雾霍天气的主要污染物PM2.5在空气中的运动属于分子的无规则运动C.煤的热值大于干木柴的热值,所以烧煤放出的热量一定比烧干木柴放出的热量多D.在使用实验室常用温度计测量物体温度时,温度计可以离开被测物体读数10.如图所示的现象中,利用大气压强的是()A.蚊子尖嘴插入皮肤B.注射器吸取药液C.排水管的U形“反水弯”D.液体从侧壁孔喷出11.在如图所示的电路中,电源电压保持不变。

闭合开关S,电路正常工作。

过了一会儿,灯泡L熄灭,且电压表示数变大,电流表示数变小,则故障是()A.灯泡L断路B.电阻R短路C.灯泡L短路D.电阻R断路12.家庭厨房中常用的抽油烟机装有照明灯L和排风扇,使用时,有时需要它们单独工作,有时需要它们同时工作。

图中符合上述要求的电路图是()13.如图所示的四个器械或工具中,属于费力杠杆的是()A.核桃钳B.压水井手柄C.镊子D.裁纸刀14.如图甲所示电路,当闭合开关s后,电路正常工作,两个电压表指针所示位置均如图乙所示,则电阻R1和R2两端的电压分别为()A.8V 2VB.10V 2VC.2V 8BVD.2V 10V15.在探究“影响滑动摩擦力天小的因素”实验时,将木块放置在水平木板B上,加一个砝码。

将弹赞测力计一端固定在墙上,另一编系在A上,如图所示。

当向左匀速拉动B时,A相对于地面静止.下列说法中错误的是()A.此装置可研究滑动摩擦力与压力关系B.B对A的摩擦力与测力计对A的拉力是平衡力C.A受到B的摩擦力方向为水平向左D.若增大B的速度,测力计的示数会变大二、填空題(每空2分,其36分) .16.夏天阳光通过森林树叶间的缝隙射到地面上,形成圆形光斑,这是由于光的现象形成的;游泳池注水后,看上去好像游泳池变浅了,这是由于光的现象造成的。

(两空选镇“直线传播”“反射”“折射”或“色散”)17.滑板车是小朋友喜爱的玩具之一,刘红小朋友站在滑板车上用脚向后蹬地.滑板车就沿地面向前运动,如图甲所示。

如果不再蹬地,滑板车的速度会越来越慢,最后停下来。

这表明力可以改变物体的;锺子的锤头变松了,人们常用撞击锤柄下端的方法使锤头紧套在锤柄上,如图乙所示。

这是因为锤柄突热停止时锤头由会理续向下运动,这样就套紧了。

18.有甲、乙、丙三个带电小球,已知甲球带正电,当它和不带电的验电器的金属球接触时电流的方向是,(选填“从甲到验电器”或“从验电器到甲”);若甲排斥乙,乙吸引丙,则丙球带电。

19.饺子是中国的传统美食,如图所示包饺子时,用力擀过的饺子皮叠放在一块会发生粘合现象,这说明分子之间存在。

下饺子前,当锅里1.5kg的水温度由20℃升高到30℃,不计热量损失,则水吸收的热量为 J。

[c水=4.2×103J/(kg•℃)]操作规范但验电笔的氖管不发光,是因为验电笔接触了。

小丽家电脑的三脚插头如图2所示.请判断新头的3号脚应接。

(两空选填“火线”“零线”或“地线”)21.当轮船从长江驶人东海时,船身将 (选填“下沉”或“上浮”)一些;若另有一艘轮船也要前往东海,两艘轮船不能近距离并排航行,是为了防止因两船内侧水流速度大于外侧水流速度,造成内侧压强外侧压强(选镇于“大于”或“小于”),致使两船相碰。

22.电热水壶上标有“220V 800W”。

小明发现烧水过程中热水壶的发热体部分很快变热,但连接的导线却不怎么热,是因为导线的电阻比发热体的电阻;在额定电压下,热水壶烧水210s,这段时间内电热水壶产生的热量 J。

23.如图甲所示的电路中,开关S闭合时。

当滑动变阻器的滑片P向左滑动时,弹簧测力计示数将 (选填“变大”“变小”或“不变");乙图的实验原理与的工作原理相同(选填“发电机”“电动机”或“内燃机”)24.2019年10月18日,第七届世界军人运动会在武汉举行,这是我国第一次承办综合性国际军事赛事,也是继北京奥运会后举办的规模最大的国际体育盛会,其中,跳伞项日为5个国际军体特色比赛项目之一。

一体重为600N的运动员从悬停在空中的直升机上由静止开始竖直跳下,其速度与时间的关系如图所示,经15s下落125m后,开始做匀速直线运动直至落地,整个过程用时30s。

在整个过程中,该运动员重力做功为 J;匀速下降时运动员的机械能(选填“增大”、“减小”或“不变”)。

三、作图与计算题(25题4分.26题6分.27题6分,共16分)25.(1)如图所示是用羊角锤撬铁钉时的示意图,请画出动力F1的力臂L1和羊角锤受到的阻力F2的示意图。

(2)根据图中条形磁体的N极,标出已给磁感线的方向和小磁针静止时的N极。

26.“节能减排,低碳生活”旨在倡导节约能源和减少二氧化碳排放。

李明同学坚持骑自行车上下学,他的质量为50kg,所骑自行车质量为15kg。

(g=10N/kg)求:(1)若他在平直公路上5min内匀速行驶了1500m,则这段时间他骑行的速度是多大?(2)若他骑行时自行车两轮与地面总的接触面积为25cm2,则他骑行时自行车对地面的压强为多少?27.如图甲,电源电压保持不变,小灯泡上标有“8V”字样,电流表的量程为0~1.2A,如图乙是小灯泡的电流随电压变化的图象。

滑动变阻器R1的最大阻值为20Ω,定值电阻R2的阻值为9Ω,当闭合S和S2、断开S1、滑动变阻器的滑片移到中点时,小灯泡恰好正常发光。

求:(1)电源电压是多少?(2)闭合S和S1、断开S2,为保证电流表的安全,滑动变阻器的取值范围为多少?四、实验探究题(每空2分,共18分)28.如图所示,在探究影响导体电阻大小的因素时, 小兵、小红两位同学作出了如下猜想:①导体的电阻与导体的长度有关②导体的电阻与导体的横截面积有关。

③导体的电阻与导体的材料有关。

实验室提供了4根电阻丝,规格、材料如表两根电阻丝进行实验,是为了验征猜想 (M 、N 两点间时,电流表示数不相同,由此,初步得到的结论是:长度和横截面积相同时, 。

(2)有同学认为,可以根据灯泡亮度的变化来判断接入的电用丝阻值的变化情况。

老师指出:此实验中这种方法不可取。

这是因为电源电压一定时,所选电阻丝的阻值相差太大,灯泡亮度变化 (选填“明显”或“不明显")。

(3)在最近几年,我国城乡许多地区进行了输电线路的改造,将原来细的铝质输电线换成较粗的铝质输电线,这样就 了输电线的电阻(选填“增大”或“减小"),从而减小了输电线上的能量损耗。

29.地沟油中含有杂质及有毒物质,很多人猜想它的密度应该比正常食用油的密度要大,为了验证这种猜想,张红和刘文设计了下面的“测地沟油密度”的两个实验方案,请回答下列问题:(1)方案一:用调节平衡的天平测出空烧杯的质量m 0,向烧杯内倒入适量地沟油,再测出烧杯和地沟油的总质量m 1,然后把烧杯内的地沟油全部倒入量筒内,读出量筒内地沟油的体积为V 1;其测得的地沟油密度的表达式:ρ油= ;(2)方案二:在烧杯内倒入适量的地沟油,用调节平衡的天平测出烧杯和地沟油的总质量m 2,把烧杯中的地沟油倒入量筒中,读出量筒中地沟油的体积为V 2,再用天平测出烧杯和剩余地沟油的总质量m 3.其测得的地沟油密度的表达式是:ρ油= ;(3)按方案 进行测量,实验误差可能小一些;如果选择另一种方案,测得的密度值 (选填“偏大”、“偏小”)。

(4)小明找到质量为0.23kg 的地沟油,测出其体积为250mL ,准备用密度这一指标来鉴别地沟油,你觉得他能否鉴别地沟油,你觉得他们能否鉴别出来并说明理由 。

(已知正常食用油的密度约为0.91×103kg/m 3~0.93×103kg/m 3)B 卷(共20分)一、不定项选择题(每小题2分,共10分, 有的小题只有一个选项符合题目要求,有的小题有两个选项符合题目要求,全部选对的得2分,选对但不全的得1分,有选错或者不选的得0分)1.下列关于能量转化的说法,正确的是( )A.目前有些新能源汽车,实现了“零排放”,效率可达100%B.水壶里水沸腾壶盖跳动时机械能转化为内能C.提高能量利用中的转化效率是节能问题的核心D.将塑料笔杆在头发上摩擦起电是把电能转化为机械能2.将焦距为10cm 的凸透镜固定在光具座上50cm 刻度线处.将光屏和点燃的蜡烛分别放在凸透镜的两侧,如图所示。

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