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1、2012年江苏省南通市最新中考数学模拟试卷二江苏省南通市2012年中考数学模拟试卷(二) (满分150分，考试时间120分钟) 一、选择题(本大题共8小题，每小题3分，共计24分(在每小题所给出的四个选项中，恰有一项是符合题目要求的() (1(,6的相反数是 ( ? ) 11A(,6 B(6 C( D( ,662(下列各等式中，正确的是( ? ) 22A(16 ,?4; B(?16 ,4 C(,5 ),5 D(,(,5) ,5 3(如左图是由几个相同的小正方体搭成的一个几何体，它的俯视图是( ) A( B( C( D( 4(下列各组线段中，能成比例的是( ? ) A( 1 cm，3 cm，4
2、cm，6 cm B( 30cm，12 cm，0(8 cm，0(2 cm C( 0(1 cm，0(2 cm，0(3 cm，0(4 cm D( 15 cm，16 cm，40 cm，6 cm 5(打开某洗衣机开关，在洗涤衣服时(洗衣机内无水)，洗衣机经历了进水、清洗、排水、脱水四个连续过程，其中进水、清洗、排水时洗衣机中的水量y(升)与时间x(分钟)之间满足某种函数关系，其函数图象大致为 ( ? ) A( B( C( D( 6(已知圆锥的底面半径为1cm，母线长为3cm，则其全面积为 ( ? ) A( B(3 C(4 D(7 7(下列三视图所对应的直观图是 ( ? ) A( B( C( D( a8(
3、用一把带有刻度的直尺，?可以画出两条平行的直线与b，如图?;?可以画出?AOB的平分线OP，如图?所示;?可以检验工件的凹面是否为半圆，如图?所示;?可以量出一个圆的半径，如图?所示(这四种说法正确的个数有 ( ? ) accident and the responsibility of leadership, such as concerning administrative sanctions should be dealt with by the personnel Department of the company. (3) personal injury accident occur
4、s, the direct punishment 500-1000, who is directly responsible for the accident responsibility, give notice of criticism and 50-100 economic sanctions against them. (4) to conceal the accident, reported without undue delay or false, to inform the administrative leadership of the criticism, resulting
5、 in serious consequences, the pursuit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction stand
6、ards and specifications, serial number a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for co
7、nstruction and acceptance of field equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels 7 JB/4709-2000 8 JB4730-2005 pre
8、ssure 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 specification for
9、 construction and acceptance of oil tank 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 A(1个 B(2个 C(3个 D(4个 二、填空题:(本大题共10小题，每小题3分，共计30分(不需写出解答过程() 229(分解
10、因式:= ? ( ，2x，1,x5x,1210(不等式?的负整数解是 ? ( ，24x,302，3,1,5,111(计算:= ? ( 2k12(已知方程x,3x，k,0有两个相等的实数根，则= ? ( 13(在一个不透明的口袋中装有若干个只有颜色不同的球，如果口袋中装有4个红球，且摸1出红球的概率为，那么袋中共有 ? 个球( 314(梯形的中位线长为3，高为2，则该梯形的面积为 ? ( ,ABE?,ACD15(如图15，AB,AC ，要使，应添加的条件是_?_ (添加一个条件即可)( 16(如图，量角器外缘上有A、B两点，它们所表示的读数分别是80?、50?，则?ACB应为 ? ( A E D
11、 A a b B C b a a b B C 第15题 第17题图 第16题 17(如图，正方形卡片A类、B类和长方形卡片C类各若干张，如果要拼一个长为(a，2b)、宽为(a，b)的大长方形，则需要C类卡片 ? 张( 18(观察下列一组数的排列:1，1，2，3，5，8，13，21，34，前2009个数中，有 ? 个偶数( 三、解答题:(本大题共12小题，共计96分，解答时应写出文字说明、证明过程或演算步骤() 11,x19(1)(本题4分)解方程:( ,3x,22,xaccident and the responsibility of leadership, such as concernin
12、g administrative sanctions should be dealt with by the personnel Department of the company. (3) personal injury accident occurs, the direct punishment 500-1000, who is directly responsible for the accident responsibility, give notice of criticism and 50-100 economic sanctions against them. (4) to co
13、nceal the accident, reported without undue delay or false, to inform the administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident
14、 and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial number a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual
15、 methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH3525-20
16、04 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 equipmen
17、t installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vessel steel welded specification for construction and acceptance of oil tank 3 JB/ T4735-1997 steel welded atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction a
18、nd acceptance specification for 5 GB50275-98 compressor, fan 数学教师网 精品资料下载 免费下载 ,112x,x,1)(本题4分)先化简，再求值:，其中，( (2，,y,2,22x,yx，yx，2xy，y,20(本题8分) 如图，在一个1010的正方形DEFG网格中有一个?ABC。 ?在网格中画出?ABC向下平移3个单位得到的?ABC。 111?在网格中画出?ABC绕C点逆时针方向旋转90?得到的?ABC。 22?若以EF所在的直线为x轴，ED所在的直线为y轴建立直角坐标系，写出A、A两12点的坐标。 D G B A C F E 乒乓
19、球 足球 篮球 其他 accident and the responsibility of leadership, such as concerning administrative sanctions should be dealt with by the personne数学教师网收集整理 第3页 l Department of the company. (3) personal injury accident occurs, the direct punishment 500-1000, who is directly responsible f共12页 欢迎下载教学资料or the a
20、ccident responsibility, give notice of criticism and 50-100 economic sanctions against them. (4) to conceal the acciden t, reported without undue delay or false, to inform the administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 500-100
21、0 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial number a 1 GB3323-2005 steel fusion wel
22、ded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ222-92 technical spec
23、ification for welding of aluminium and its alloys 5 low temperature steel welding 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
24、-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 specification for construction and acceptance of oil tank 3 JB/ T4735-1997 steel welded
25、atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction and acceptance specification for 5 GB50275-98 compressor, fan21(本题8分) 60 某中学准备举行一次球类运动会，在举行运动会之前，同学们就该校学生最喜欢那种球类运动问题进行了一次调查，并将调查结果制成了表格、条形图和扇形统计图，请你根据图表信息完成下列各题: (1)此次共调查了多少位学生, (2)请将表格和条形统计图补充完整. 1
26、_40 其他3% 120_ 100_ 乒乓球20% 80_ 篮球 60_ 44% 40_ 足球44% 20_ 33% 0_ _ _ _ _ 乒乓球 足球 篮球 其他 22(本题8分) 在一个不透明的盒子中放有四张分别写有数字1，2，3，4的红色卡片和三张分别写有数字1，2，3的蓝色卡片，卡片除颜色和数字外完全相同( (1)从中任意抽取一张卡片，求该卡片上写有数字1的概率; (2)将3张蓝色卡片取出后放入另外一个不透明的盒子内，然后在两个盒子内各任意抽取一张卡片，以红色卡片上的数字作为十位数，蓝色卡片上的数字作为个位数组成一个两位数，求这个两位数大于22的概率( 23(本题10分) 某工厂大楼后
27、面紧邻着一个土坡，坡上面是一块平地，如图所示，BC?AD，斜坡AB0长22m，坡角?BAD=60，为了防止山体滑坡，保障安全，工厂决定对该土坡进行改造(经accident and the responsibility of leadership, such as concerning administrative sanctions should be dealt with by the personnel Department of the company. (3) personal injury accident occurs, the direct punishment 500-1000
28、, who is directly responsible for the accident responsibility, give notice of criticism and 50-100 economic sanctions against them. (4) to conceal the accident, reported without undue delay or false, to inform the administrative leadership of the criticism, resulting in serious consequences, the pur
29、suit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial n
30、umber a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of fiel
31、d equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature steel welding 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 o
32、f 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 specification for construction and acceptance of o
33、il tank 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 数学教师网 精品资料下载 免费下载 0时，可确保山体不滑坡( 地质人员勘测，当坡角不超过45(1)求改造前坡顶与地面的距离BE的长; (2)为确保安全，工厂计划改造时保持坡脚A不动，坡顶B沿BC削
34、进到F点处，问BF至少是多少米, 第23题 24(本题满分10分) 点D是?O的直径CA延长线上一点，点B在?O上，BD是?O的切线,且AB,AD( (1)求证:点A是DO的中点( (2)若点E是劣弧BC上一点，AE与BC相交于点F，且?BEF的面积为8，cos?BFA2,，求?ACF的面积( B_ 3E_ F_ C_ D_ A_ O_ 25(本题满分10分) 姚明将带队来我市体育馆进行表演比赛，市体育局在策划本次活动，在与单位协商团购票时推出两种方案(设购买门票数为x(张)，总费用为y(元)(方案一:若单位赞助广告费8000元，则该单位所购门票的价格为每张50元;(总费用,广告赞助费+门票费
35、) 方案二:直接购买门票方式如图所示( 解答下列问题: (1)方案一中，y与x的函数关系式为 ; accident and the responsibility of leadership, such as concerning administrative sanctions should be dealt with by the personne数学教师网收集整理 第5页 l Department of the company. (3) personal injury accident occurs, the direct punishment 500-1000, who is direc
36、tly responsible f共12页 欢迎下载教学资料or the accident responsibility, give notice of criticism and 50-100 economic sanctions against them. (4) to conceal the acciden t, reported without undue delay or false, to inform the administrative leadership of the criticism, resulting in serious consequences, the pur
37、suit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial n
38、umber a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of fiel
39、d equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature steel welding 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 o
40、f 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 specification for construction and acceptance of o
41、il tank 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方案二中，当0?x?100时，y与x的函数关系式为 ， 当x,100时，y与x的函数关系式为 ; (2)如果购买本场篮球赛门票超过100张，你将选择哪一种方案，使总费用最省,请说明理由; (3)甲、
42、乙两单位分别采用方案一、方案二购买本场篮球赛门票共700张，花去总费用计56000元，求甲、乙两单位各购买门票多少张( y(元) 10000 8000 O x(张)100 120 第25题图 26(本题满分10分) 一、阅读理解: 在?ABC中，BC=a，CA=b，AB=c; 222a，b,c(1)若?C为直角，则; 222222a，bca，b,c(2)若?C为为锐角，则与的关系为: A accident and the responsibility of leadership, such as concerning administrative sanctions should be dea
43、lt with by the personnel Department of the company. (3) personal injury accident occurs, the direct punishment 500-1000, who is directly responsible for the accident responsibility, give notice of criticism and 50-100 economic sanctions against them. (4) to conceal the accident, reported without und
44、ue delay or false, to inform the administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident
45、 penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial number a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and te
46、sting results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of weldi
47、ng 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
48、GB50128-2005 vertical cylindrical steel pressure vessel steel welded specification for construction and acceptance of oil tank 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 C B D 数学教师网 精品资料下载 免费下载 证明:如图过A作AD?BC于D，则BD=BC,CD=a,CD 222在?ABD中:AD=AB,BD 222在?ACD中:AD=AC,CD 2222AB,BD= AC,CD 2222c,(,CD)= b,CD a222? a，b,c,2a,CD?0，CD0 a222222?，所以: a，b,c,0a，b,c222(3)若?C为钝角，试推导a，b与c的关系( 二、探究问题:在?ABC中，BC=a=3，CA=b=4，AB=c;若?ABC是钝角三角形，求第三边c的取