2013年中考数学模拟试卷三 A3
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8. 如图，OA?OB，等腰直角三角形CDE的腰CD在OB上，?ECD=45?，2013年中考数学预测试卷(三) N将?CDE绕点C逆时针旋转75?，点E的对应点N恰好落在OA上，EM(满分120分，考试时间100分钟) OC则的值为【 】 一、选择题(每小题3分，共24分) CD
1. |,3|的倒数是【 】 112311A( B( C( D( OCDBA(,3 B( C(3 D( ,233233
二、填空题(每小题3分，共21分) 2. 已知:如图，BD平分?ABC，点E在BC上，EF?AB(若?CEF=100?，则?ABD的度29.mnmnm，，,69 分解因式:____________________( 数为【 】
A(60? B(50? C(40? D(30? 10. 用反证法证明命题“三角形中至少有一个内角大于或等于60?”，首先应假设__________(
A21DF11. 如图，直线x=t(t>0)与反比例函数，的图象分别交于B，C两点，A为yy,,y,xx131轴上的任意一点，则?ABC的面积为____________(
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第2题图 第3题图 第5题图 FBC3. 如图，数轴上
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示的是某不等式组的解集，则这个不等式组可能是【 】 BDCx，10?x，10?x，10?x，10?Q,,,,A( B( C( D( ,,,,EOx????20,x20,xx,20x,20,,,,C30?A24. 四名运动员参加了射击预选赛，他们的成绩的平均环数x及方差S如下表所示: ABEDAP
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12. 实验中学安排四辆车组织九年级学生团员去敬老院参加学雷锋活动，这四辆车的编号分2S 1 1 1.1 1.7
别是1，2，3，4(小王和小李都可以从这四辆车中任选一辆搭乘，那么小王和小李搭乘如果选出一个成绩较好且状态稳定的人去参赛，那么应选【 】 的车编号相邻的概率是_______( A(甲 B(乙 C(丙 D(丁 13. 如图，在?ABCD中，AD=2，AB=4，?A=30?，以点A为圆心，AD的长为半径画弧交AB5. 如图是一个由多个正方体堆积而成的几何体的俯视图(图中所示数字为该位置上小正方于点E，连接CE，则阴影部分的面积是____________(结果保留π)( 体的个数，则这个几何体的左视图是【 】 14. 如图，矩形纸片ABCD中，AB=5cm，BC=10cm，CD上有一点E，EC=3cm，AD上有一
点P，PA=7cm，过点P作PF?BC交BC于点F，将纸片折叠，使点P与点E重合，
折痕与PF交于点Q，则线段PQ的长是___________cm(
C15. 如图，梯形ABCD中，AD?BC，点E在BC上，AE=BE，点F是CD的中点，且AF?
AB，若AD=2.7，AF=4，AB=6，则CE的长为_________( AD
A( B( C( D( DBO
6. 如图，A，B，C是?O上的点，?CAB=20?，过点C作 F?O的切线交OB的延长线于点D，则?D=【 】 三、解答题(本大题共8小题，满分75分)
A,1A(40? B(50? C(60? D(70? 1,,0115,,,,，,23(2)|1|16. (8分)(1)计算:; 2,,CBE,7. 已知二次函数y=x,7x+，若自变量x分别取x，x，x，且0
y>yB(yy>yD(y1)，连接BD，以BD为边在第EA(C')A(A')B一象限内作正方形DBFE，设M为正方形DBFE的中心，直线MA交y轴于点N(如果ADBD定义:只有一组对角是直角的四边形叫做损矩形( BA'A(A')BA' (1)试找出图1中的一个损矩形并说明这个损矩形的四个顶点在同一个圆上( 图1 图2 图3 图4
yy(2)随着点D位置的变化，点N的18. (9分)为增强环保意识，某社区
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开展一次“减碳环保，减少用车时间”的宣传活F位置是否会发生变化,若没有发生动，对部分家庭五月份的平均每天用车时间进行了一次抽样调查，并根据收集的数据绘FE变化，求出点N的坐标;若发生变化，制了下面两幅不完整的统计图(请根据图中提供的信息，解答下列问题: E请说明理由( )本次抽样调查了多少个家庭, (1家庭数/个MGMBBC(3)在图2中，过点M作MG?y轴10090C(2)将图1中的条形图补充完整，直接写 1~1.5小时80于点G，连接DN，若四边形DMGN出用车时间的中位数落在哪个时间段内; 60AAODxODx为损矩形，求点D的坐标( 54?)求用车时间在1,1.5小时的部分对 (31.5~2小时108?4030 NN应的扇形圆心角的度数; 200.5~1小时 图1图2(4)若该社区有车家庭有1 600个，请你 23. (11分)如图，在平面直角坐标系中，点A，B，C在x轴上，点D，E在y轴上，OA=OD=2，O2~2.5小时0.5 11.522.5时间/小时估计该社区用车时间不超过1.5小时的约 图1图2OC=OE=4，DB?DC，直线AD与经过B，E，C三点的抛物线交于F，G两点，与其对A有多少个家庭, 称轴交于点M(点P为线段FG上一个动点(不与F，G重合)，PQ?y轴与抛物线交19. (9分)小强在教学楼的点P处观察对面的办公大楼(为了测
于点Q( 量点P到对面办公大楼上部AD的距离，小强测得办公大楼顶
(1)求经过B，E，C三点的抛物线的解析式( 部点A的仰角为45?，底部点B的俯角为60?，已知办公大楼高 M(2)是否存在点P，使得以P，Q，M为顶点的三角形为等腰直角三角形,若存在，求P46米，CD=10米(求点P到AD的距离(用含根号的式子表示)( y出满足条件的点P的坐标;若不存在，请说明kNCD20. (9分)如图，一次函数y=ax,1的图象与反比例函数y=的图 理由( x
(3)若抛物线的顶点为N，连接QN，探究四边象交于A，B两点，与x轴交于点C，与y轴交于点D，已知 GB形PMNQ的形状:?能否成为菱形;?能否成1Ey10OA=，tan?AOC=( M为等腰梯形(若能，请直接写出点P的坐标;3
若不能，请说明理由( (1)求a，k的值及点B的坐标; D AkFax,1(2)观察图象，请直接写出不等式?的解集; xAC Ox(3)在y轴上存在一点P，使得?PDC与?ODC相似， BxOCD 请你求出P点的坐标(
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procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels 7 JB/4709-2000 8 JB4730-2005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T4744-2000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T4735-1997 steel welded atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction and acceptance specification for 5 GB50275-98 compressor, fan and pump installation engineering construction and acceptance specification for lifting 6 HG20201-2000 construction installation engineering construction standard 7, HG ... Pressure gauges, using an installed spark arrestor for acetylene cylinders, illegal carrying, using gas cylinders, each operator fined 20 Yuan. Gas bottle without the hot sun exposure measures, responsibilities of team a fine of 50 Yuan. (7) at height and the opening and provisional protective measures have been taken, the responsible unit fined 200 Yuan, construction person in charge a fine of 50 Yuan. (8) no permit to work and the job in accordance with the provisions, on the job unit fined 300 yuan, the unit will charge a fine of 100 Yuan. 7.5.3 accident penalties (1) injuries fatalities directly punished 1~2 million. Direct responsibility for the accident and have the corresponding responsibility of leadership, such as concerning administrative sanctions, should be brought to the company or the relevant Department. (2) personal injury accident occurred, the direct punishment 0.5-10,000 yuan, responsible for the direct responsibility for the
以下为非选择题答题区，必须用0.5毫米黑色墨水的签字笔在指定的区域内作答，否则
答案
八年级地理上册填图题岩土工程勘察试题省略号的作用及举例应急救援安全知识车间5s试题及答案
无效。 以下为非选择题答题区，必须用0.5毫米黑色墨水的签字笔在指定的区域内作答，否则答案无效。 2013年中考数学预测试卷(三)
17.(9分) 19.(9分) 答题卡 (1)____________; 姓名 (2)____________;_______________( A
准考 证号 C(C')
缺考标记 请E 请 正确填涂 A(A') 注注B M 意意缺考学生，有监考员贴条形码， P粘粘 并由监考员用2B铅笔填涂右面的缺考标记。 贴贴 D 范 范 CD围 围 图41.答题前，考生务必用黑色的0.5毫米签字笔将姓名、准考证号 等栏目填写清楚。 注 2.请在各题目对应的答题区作答，超出答题区域
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关于书的成语关于读书的排比句社区图书漂流公约怎么写关于读书的小报汉书pdf
写的答案无 意事效，在试卷上答题无效;要求字体工整，笔迹清晰。 B 项 3.保持答题卡清洁、完整，严禁折叠，严禁在答题卡上做任何标 记，严禁使用涂改液、胶带纸和修正液。 一、选择题(每小题3分，共24分) 1([A] [B] [C] [D] 3([A] [B] [C] [D] 5([A] [B] [C] [D] 7([A] [B] [C] [D] [A] [B] [C] [D] 4([A] [B] [C] [D] 6([A] [B] [C] [D] 8([A] [B] [C] [D] 2( 以下为非选择题答题区，必须用0.5毫米黑色墨水的签字笔在指定的区域内作答，否则答案无效。 18.(9分) 20.(9分) 二、填空题(每小题3分，共21分) y 家庭数/个 9.___________ 10. ______________________________________ 10090
8011. __________ 12. __________ 13. __________ 14. _________ A 6015. ___________ 4030 C Ox20
D三、解答题(本大题共8小题，满分75分) O0.5 11.522.5 时间/小时 16.(8分) B图1
procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels 7 JB/4709-203 00 8 JB4730-2005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T4744-2000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T4735-1997 steel welded atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction and acceptance specification for 5 GB50275-98 compressor, fan and pump installation engineering construction and acceptance specification for lifting 6 HG20201-2000 construction installation engineering construction standard 7, HG ... Pressure gauges, using an installed spark arrestor for acetylene cylinders, illegal carrying, using gas cylinders, each operator fined 20 Yuan. Gas bottle without the hot sun exposure measures, responsibilities of team a fine of 50 Yuan. (7) at height and the opening and provisional protective measures have been taken, the responsible unit fined 200 Yuan, construction person in charge a fine of 50 Yuan. (8) no permit to work and the job in accordance with the provisions, on the job unit fined 300 yuan, the unit will charge a fine of 100 Yuan. 7.5.3 accident penalties (1) injuries fatalities directly punished 1~2 million. Direct responsibility for the accident and have the corresponding responsibility of leadership, such as concerning administrative sanctions, should be brought to the company or the relevant Department. (2) personal injury accident occurred, the direct punishment 0.5-10,000 yuan, responsible for the direct responsibility for the
以下为非选择题答题区，必须用0.5毫米黑色墨水的签字笔在指定的区域内作答，否则答案无效。 以下为非选择题答题区，必须用0.5毫米黑色墨水的签字笔在指定的区域内作答，否则答案无效。 以下为非选择题答题区，必须用0.5毫米黑色墨水的签字笔在指定的区域内作答，否则答案无效。
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procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels 7 JB/4709-2000 8 JB4730-2005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T4744-2000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T4735-1997 steel welded atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction and acceptance specification for 5 GB50275-98 compressor, fan and pump installation engineering construction and acceptance specification for lifting 6 HG20201-2000 construction installation engineering construction standard 7, HG ... Pressure gauges, using an installed spark arrestor for acetylene cylinders, illegal carrying, using gas cylinders, each operator fined 20 Yuan. Gas bottle without the hot sun exposure measures, responsibilities of team a fine of 50 Yuan. (7) at height and the opening and provisional protective measures have been taken, the responsible unit fined 200 Yuan, construction person in charge a fine of 50 Yuan. (8) no permit to work and the job in accordance with the provisions, on the job unit fined 300 yuan, the unit will charge a fine of 100 Yuan. 7.5.3 accident penalties (1) injuries fatalities directly punished 1~2 million. Direct responsibility for the accident and have the corresponding responsibility of leadership, such as concerning administrative sanctions, should be brought to the company or the relevant Department. (2) personal injury accident occurred, the direct punishment 0.5-10,000 yuan, responsible for the direct responsibility for the
2013年中考数学预测试卷(三)参考答案
一、选择题 1 2 3 4 5 6 7 8
D B A B D B A C 二、填空题
329( 10(三角形中的三个内角都小于60? 11(mn(3)，2
133,3,2.312( 13( 14( 15( 483 三、解答题
x 16((1),3;(2)原式=，当x=2tan45?时，原式=2( x,1
17((1)平行四边((2)90;直角梯((3)等腰梯形;理由略( 18((1)200个;(2)统计图略，中位数落在1,1.5时间段内;
(3)162?; (4)1200个(
1838,19(米(
2339akB,,,,，，，3(2),,?或?xx03P(0)，20((1);(2);(3)或(0,0)( 322 4
2zxx,,，,21361 80021((1);
(2)当销售单价为25元或43元时，厂商每月能获得350万元的利润，当销售单价为34
元时，厂商每月能获得最大利润，最大利润是512万元( (3)每月的最低制造成本需要648万元(
22((1)图1中的四边形ADMB是一个损矩形，理由略(
(2)点N的位置不会发生变化，( N(01)，,
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223((1)( yxx,,，，34
311711,,(2)存在，点P的坐标为( (2343)(),,，或， 22
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procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels 7 JB/4709-205 00 8 JB4730-2005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T4744-2000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T4735-1997 steel welded atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction and acceptance specification for 5 GB50275-98 compressor, fan and pump installation engineering construction and acceptance specification for lifting 6 HG20201-2000 construction installation engineering construction standard 7, HG ... Pressure gauges, using an installed spark arrestor for acetylene cylinders, illegal carrying, using gas cylinders, each operator fined 20 Yuan. Gas bottle without the hot sun exposure measures, responsibilities of team a fine of 50 Yuan. (7) at height and the opening and provisional protective measures have been taken, the responsible unit fined 200 Yuan, construction person in charge a fine of 50 Yuan. (8) no permit to work and the job in accordance with the provisions, on the job unit fined 300 yuan, the unit will charge a fine of 100 Yuan. 7.5.3 accident penalties (1) injuries fatalities directly punished 1~2 million. Direct responsibility for the accident and have the corresponding responsibility of leadership, such as concerning administrative sanctions, should be brought to the company or the relevant Department. (2) personal injury accident occurred, the direct punishment 0.5-10,000 yuan, responsible for the direct responsibility for the
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