最新广东省深圳市宝安实验中学九年级中考数学模拟优秀名师资料.docx
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最新广东省深圳市宝安实验中学九年级中考数学模拟优秀名师资料
广东省深圳市宝安实验中学九年级中考数学模拟
中考试题8
1.,6的绝对值是()
11(A)6(B),6(C)(D),66
2.据深圳特区报2月28日报告,2011年底我市机动车保有量为200.8万辆,汽车保有量排名全国第二。
将数据
200.8万保留三个有效数字,用科学记数法表示为()
6267(A)2.008×10(B)2.01×10(C)2.01×10(D)0.201×10
3.下列食品商标中,即是轴对称又是中心对称图形的是()
(A)(B)(C)(D)
4.下列运算正确的是()
32632522222(A)a?
a,a(B)(a),a(C)(a,b)(a,b),a,b(D)(a,b),a,b5.根据深圳空气质量时报显示,2013年5月10日15时我市部分环境监测站“PM2.5的24小时滑动平均分指数
“如下表所示:
监测站名称盐田福田南山宝安罗湖龙岗
PM2.555607353554024小时滑动平均分指数
对于这组数据,下列说法中错误的是()
(A)平均数是56(B)众数是55(C)中位数是55(D)方差是7
6.如图,在?
ABC中,D、E分别是边AB、AC的中点,?
B,50?
,现将?
ADE沿DE折叠,点A落在三角形
所在的平面内的点A,则?
BDA的度数为()11
(A)50?
(B)60?
(C)70?
(D)80?
7.小明在白纸上任意画一个锐角,他画的角在30?
到60?
之间的概率是()
1112(A)(B)(C)(D)3623
8.下列叙述正确的个数是()
222?
相等的角是对顶角;?
长度相等的弧是等弧;?
若a,b,则a,b是确定事件;?
一元二次方程x―x―1,0有两个不相等的实数根;
(A)1个(B)2个(C)3个(D)4个
9.如图是一个圆形人工湖的示意图,弦AB是湖上的一座桥,已知桥AB长100m,测得圆周角?
ACB,60?
,则
这个人工湖的直径AD为()
Colorimetrictube10mLglass.4,theanalysissteppreparationofthesamplesolution:
precisionweighingapproximately0.01g~1.0gsample(accurateto0.0001g)in1...V2--determinationofsamplingvolume.Unitml(mI.);M--qualityofthesample,expressedingrams(g);Theatomicweightof55.84--Fe;2--conversionfactors.6,precisionunderrepeatabilityconditionstoobtaintheabsolutevalueofthedifferenceoftwoindependenttestresultsshallnotexceedthearithmeticalaverageofthe10%.Foodadditivessweetagent[saccharinsodium,andsweetpigment,andacetylsulfaacidpotassium(Anngamehoney],andcoloringagentoftestaccordingtofocusintroducedanti-oxidantofdetection(BHA,andBHT,andPG,andTBHQ),]GB2760GB/T5009.30,andGB/T5009.32,andGB/T5009.35,andfoodintheoftenusingofanti-oxidantmainhasBHA,andBHT,andPG,andTBHQtert-butylhydroxyfennelether(BHA)2,6-IItert-butyloncresol(BHT)Oftert-butylhydroxyanisole(BHA)2,6-di-tert-butyl-p-cresol(BHT)testinginaccordancewithGB/T5009.30vaporphasechromatographyandthin-layerchromatography,thissectionfocusesonColorimetry.Principle1,obtainedbysteamdistillationofthesample.separatetheBHT,methanolabsorption,o-anisidineandsodiumnitritesolutionorange-red,extractedwithchloroform,comparedwithstandardsizing.2,anhydrouscalciumchloridereagent.Methanol.Chloroform.Methanol(50%).Sodiumnitritesolution(3g/l):
keepindarkplace.O-anisidinesolution;weighing125mgo-anisidinein50mLthesecondBrownvolumetricflask,add25mLmethanolandshaketodissolve,and50mgactivatedcarbon,shake
10032003(A)(B)(C)(D)150m1003mmm33
210.已知二次函数y,ax,bx,c(a?
0)的图象如图所示,现有下列结论:
?
abc>0;?
b2,4ac<0;?
4a,2b,c<0;
?
b,,2a;其中结论正确的是()
(A)?
?
(B)?
?
(C)?
?
(D)?
?
11.观察下列图形及图形所对应的算式,根据你发现的规律计算:
1,8,16,24,……,8n(n是正整数)的结果是
()
2222(A)(2n,1)(B)(2n,1)(C)(n,2)(D)n
(第9题)(第10题)(第11题)
12.如图,?
ABC和?
ADE都是等腰直角三角形,?
BAC,?
DAE,90?
,四边形ACDE是平行四边形,连结CE
?
CE,BD;?
?
ADC是等腰Rt?
;?
?
ADB交AD于F,连结BD交CE于点G,连结BE;下列结论中:
?
AEB;?
CD?
AE,EF?
CG;一定正确的结论有()
(A)1个(B)2个(C)3个(D)4个
2213.因式分解:
3x,6xy,3y,______________________
m+n3m-n14.如果单项式2xy与单项式xy是同类项,则mn,________
ky,(k,0)15.如图,已知函数y,,x,1的图象与x轴、y轴分别交于C、B两点,与双曲线交于A、D两点,x
若BC,2AB,则k的值为____________
12y,x16.如图,将抛物线平移得到抛物线m,抛物线m经过点A(,6,0)和原点O(0,0),它的顶点为P,对3
12y,x称轴与抛物线交于点Q,则图中阴影部分的面积为________3
(第12题)(第15题)(第16题)Colorimetrictube10mLglass.4,theanalysissteppreparationofthesamplesolution:
precisionweighingapproximately0.01g~1.0gsample(accurateto0.0001g)in1...V2--determinationofsamplingvolume.Unitml(mI.);M--qualityofthesample,expressedingrams(g);Theatomicweightof55.84--Fe;2--conversionfactors.6,precisionunderrepeatabilityconditionstoobtaintheabsolutevalueofthedifferenceoftwoindependenttestresultsshallnotexceedthearithmeticalaverageofthe10%.Foodadditivessweetagent[saccharinsodium,andsweetpigment,andacetylsulfaacidpotassium(Anngamehoney],andcoloringagentoftestaccordingtofocusintroducedanti-oxidantofdetection(BHA,andBHT,andPG,andTBHQ),]GB2760GB/T5009.30,andGB/T5009.32,andGB/T5009.35,andfoodintheoftenusingofanti-oxidantmainhasBHA,andBHT,andPG,andTBHQtert-butylhydroxyfennelether(BHA)2,6-IItert-butyloncresol(BHT)Oftert-butylhydroxyanisole(BHA)2,6-di-tert-butyl-p-cresol(BHT)testinginaccordancewithGB/T5009.30vaporphasechromatographyandthin-layerchromatography,thissectionfocusesonColorimetry.Principle1,obtainedbysteamdistillationofthesample.separatetheBHT,methanolabsorption,o-anisidineandsodiumnitritesolutionorange-red,extractedwithchloroform,comparedwithstandardsizing.2,anhydrouscalciumchloridereagent.Methanol.Chloroform.Methanol(50%).Sodiumnitritesolution(3g/l):
keepindarkplace.O-anisidinesolution;weighing125mgo-anisidinein50mLthesecondBrownvolumetricflask,add25mLmethanolandshaketodissolve,and50mgactivatedcarbon,shake
12013,2017.计算:
(,1),(,),(3,,),1,2sin60:
2
a,1a,2418.先化简,再求值:
,其中a,2,3(,),(,1)22aa,4a,4a,2a
19.小敏为了解本市的空气质量情况,从环境监测网随机
抽取了若干天的空气质量情况作为样本进行统计,绘制
了如图所示的条形统计图和扇形统计图(部分信息未给
出)(
请你根据图中提供的信息,解答下列问题:
(1)计算被抽取的天数;
(2)请补全条形统计图,并求扇形统计图中表示优的扇
形的圆心角度数;
(3)请估计该市这一年(365天)达到优和良的总天数(
O的直径,弦DE垂直平分半径OA,C为垂足,DE=3,连接BD,过点E作EM?
BD,交BA20.如图,AB是?
的延长线于点M(
(1)求?
O的半径;
(2)求证:
EM是?
O的切线;
(3)若弦DF与直径AB相交于点P,当?
APD=45?
时,求图中阴影部分的面积(
21.一手机经销商计划购进某品牌的A型、B型、C型三款手机共60部,每款手机至少要购进8部,且恰好用完购
机款61000元(设购进A型手机x部,B型手机y部(三款手机的进价和预售价如下表:
手机型号A型B型C型
进价(单位:
元/部)90012001100
预售价(单位:
元/部)120016001300
(1)用含x,y的式子表示购进C型手机的部数;
(2)求出y与x之间的函数关系式;Colorimetrictube10mLglass.4,theanalysissteppreparationofthesamplesolution:
precisionweighingapproximately0.01g~1.0gsample(accurateto0.0001g)in1...V2--determinationofsamplingvolume.Unitml(mI.);M--qualityofthesample,expressedingrams(g);Theatomicweightof55.84--Fe;2--conversionfactors.6,precisionunderrepeatabilityconditionstoobtaintheabsolutevalueofthedifferenceoftwoindependenttestresultsshallnotexceedthearithmeticalaverageofthe10%.Foodadditivessweetagent[saccharinsodium,andsweetpigment,andacetylsulfaacidpotassium(Anngamehoney],andcoloringagentoftestaccordingtofocusintroducedanti-oxidantofdetection(BHA,andBHT,andPG,andTBHQ),]GB2760GB/T5009.30,andGB/T5009.32,andGB/T5009.35,andfoodintheoftenusingofanti-oxidantmainhasBHA,andBHT,andPG,andTBHQtert-butylhydroxyfennelether(BHA)2,6-IItert-butyloncresol(BHT)Oftert-butylhydroxyanisole(BHA)2,6-di-tert-butyl-p-cresol(BHT)testinginaccordancewithGB/T5009.30vaporphasechromatographyandthin-layerchromatography,thissectionfocusesonColorimetry.Principle1,obtainedbysteamdistillationofthesample.separatetheBHT,methanolabsorption,o-anisidineandsodiumnitritesolutionorange-red,extractedwithchloroform,comparedwithstandardsizing.2,anhydrouscalciumchloridereagent.Methanol.Chloroform.Methanol(50%).Sodiumnitritesolution(3g/l):
keepindarkplace.O-anisidinesolution;weighing125mgo-anisidinein50mLthesecondBrownvolumetricflask,add25mLmethanolandshaketodissolve,and50mgactivatedcarbon,shake
(3)假设所购进手机全部售出,综合考虑各种因素,该手机经销商在购销这批手机过程中需另外支出各种费用共1500元(
?
求出预估利润P(元)与x(部)的函数关系式;(注:
预估利润P=预售总额-购机款-各种费用)?
求出预估利润的最大值,并写出此时购进三款手机各多少部(
222.如图,抛物线与x轴交于A(x,0),B(x,0)两点,且x,x,与y轴交于点C(0,4),其中x、x是方程x,1212122x,8,0的两个根;
(1)求这条抛物线的表达式;
(2)点P是线段AB上的动点,过点P作PE?
AC,交BC于点E,连接CP,当?
CPE面积最大时,求点P的坐标;
23.如图,在直角坐标系中,梯形ABCD的底边AB在x轴上,底边CD的端点D在y轴上(直线CB的表达式为
416y,,x,,点A、D的坐标分别为(-4,0),(0,4)(动点P自A点出发,在AB上匀速运行(动点Q自点33
B出发,在折线BCD上匀速运行,速度均为每秒1个单位(当其中一个动点到达终点时,它们同时停止运动(设点P运动t(秒)时,?
OPQ的面积为s(不能构成?
OPQ的动点除外)(
(1)求出点B、C的坐标;
(2)求s随t变化的函数关系式;
(3)当t为何值时s有最大值,并求出最大
值(
Colorimetrictube10mLglass.4,theanalysissteppreparationofthesamplesolution:
precisionweighingapproximately0.01g~1.0gsample(accurateto0.0001g)in1...V2--determinationofsamplingvolume.Unitml(mI.);M--qualityofthesample,expressedingrams(g);Theatomicweightof55.84--Fe;2--conversionfactors.6,precisionunderrepeatabilityconditionstoobtaintheabsolutevalueofthedifferenceoftwoindependenttestresultsshallnotexceedthearithmeticalaverageofthe10%.Foodadditivessweetagent[saccharinsodium,andsweetpigment,andacetylsulfaacidpotassium(Anngamehoney],andcoloringagentoftestaccordingtofocusintroducedanti-oxidantofdetection(BHA,andBHT,andPG,andTBHQ),]GB2760GB/T5009.30,andGB/T5009.32,andGB/T5009.35,andfoodintheoftenusingofanti-oxidantmainhasBHA,andBHT,andPG,andTBHQtert-butylhydroxyfennelether(BHA)2,6-IItert-butyloncresol(BHT)Oftert-butylhydroxyanisole(BHA)2,6-di-tert-butyl-p-cresol(BHT)testinginaccordancewithGB/T5009.30vaporphasechromatographyandthin-layerchromatography,thissectionfocusesonColorimetry.Principle1,obtainedbysteamdistillationofthesample.separatetheBHT,methanolabsorption,o-anisidineandsodiumnitritesolutionorange-red,extractedwithchloroform,comparedwithstandardsizing.2,anhydrouscalciumchloridereagent.Methanol.Chloroform.Methanol(50%).Sodiumnitritesolution(3g/l):
keepindarkplace.O-anisidinesolution;weighing125mgo-anisidinein50mLthesecondBrownvolumetricflask,add25mLmethanolandshaketodissolve,and50mgactivatedcarbon,shake
2013数学中考模拟卷
(一)
1.,6的绝对值是()
11(A)6(B),6(C)(D),66
2.据深圳特区报2月28日报告,2011年底我市机动车保有量为200.8万辆,汽车保有量排名全国第二。
将数据
200.8万保留三个有效数字,用科学记数法表示为()
6267(A)2.008×10(B)2.01×10(C)2.01×10(D)0.201×10
3.下列食品商标中,即是轴对称又是中心对称图形的是()
(A)(B)(C)(D)
4.下列运算正确的是()
32632522222(A)a?
a,a(B)(a),a(C)(a,b)(a,b),a,b(D)(a,b),a,b5.根据深圳空气质量时报显示,2013年5月10日15时我市部分环境监测站“PM2.5的24小时滑动平均分指数
“如下表所示: