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1、2012年南通中考数学模拟7第?卷(选择题 共48分) 一、选择题(本大题共12个小题，每小题4分，共48分(在每小题给出的四个选项中，只有一项是符合题目要求的) ,91(的相反数是( ) 11,99A( B(, C( D( 992(如图是由,来个立方块组成的立体图形，它的俯视图是 ( ) 3(下列运算中，正确的是( ) 824 336 A. x?x=x B. 2x,x=1 C.(x)=x D. x+x=2x4(据宁波市休闲基地和商务会议基地建设五年行动计划，预计到2012年，宁波市接待游客容量将达到4646万人，其中4646万用科学记数法可表示为(保留三个有效数字) ( ) 97570.46
2、410，46.410，A( B(4.6510 C( D( 4.6510 5(在平面直角坐标系中，点与点B关于y轴对称，则点B的坐标是( ) A(25)，A( B( C( D( (52),，(25),，(25),，(25)，,6(已知一组数据2，1，2，7，3，5，3，2，则这组数据的中位数是( ) A(2 B(2.5 C(3 D(5 AB，,137、如图，数轴上两点表示的数分别为和，点B关于点A的对称点为C，则点C所表示的数为( ) ,23,13,，2313，A( B( C( D( C A O B 8、如图，点A的坐标为(,1，0)，点B在直线y=x上运动，当线段AB最短时，点B的坐标为( )
3、 y B 22,A(0，0) B(，) 222211C(,，,) D(,，,) A O x 2222(第8题图) and due diligence evaluations article 22nd head office, branch (jurisdiction), risk management, marketing management branch within the Departments credit business person assumed responsibility for the supervision and inspection and due diligen
4、ce evaluations. Article 23rd, Head Office, branches (jurisdiction), risk management, Marketing Management Department through on-site and off-site inspection, investigation report, interviews with investigators for pre-loan investigation work by way of conducting supervision and inspection, quality e
5、valuation pre-loan investigation work, and based on the evaluation results, the implementation of diversity management. 24th the control and inspection (a) the implementation of the credit system: there is no breach of credit policy relating to the granting of credit and the head office; (B) dual cr
6、edit rating: timeliness of ratings, whether the provisions of the rating, rating results are accurate; (C) the survey contents: data collection is complete, report writing is comprehensive, indicators analysis is objective, real, conclusions and the facts are consistent and reasonable; (D) double im
7、plementation of investigations system: practical implementation of double system; (E) other supervision and inspection of the contents. 25th due diligence evaluation offices and branches (jurisdiction), risk management, Marketing Management Department agreed to carry out pre-loan investigation super
8、vision and inspection work, evaluate whether investigators due diligence to determine whether the exemption should be. Investigators should be compatible with. Due diligence assessment should be based on the fact that, following the principles of objectivity, impartiality and fairness. Article 26th
9、head 29、已知圆锥的底面半径为5cm，侧面积为65cm，设圆锥的母线与高的夹角为(如图5)所示)，则sin的值为( ) 551012A( B( C( D(12131313 10、如图，菱形ABCD中，?B,60?，AB,2，E、F分别是BC、CD的中点，连接AE、EF、AF，则?AEF的周长为( ) A3332343A( B( C( D( BDEFC第10题图 NN11、如图1，在矩形中，动点R从点出发，沿?P?M方向运动至点MMNPQQ?MNRR处停止(设点运动的路程为，的面积为，如果关于的函数图象如图2yyxxx,9R所示，则当时，点应运动到( ) Q y P NP处 B(处 A(R
10、 MC(处 D(处 QM N O 4 9 x 图1 图2 12.一个质点在第一象限及轴、y轴上运动，在第一秒钟，它 xy 从原点运动到，然后接着按图中箭头所示方向运动 (01)，3 2 即，且每秒移动一个单位， (00)(01)(11)(10)，,1 那么第35秒时质点所在位置的坐标是( ) 0 1 2 3 x A( B( C( D( (40)，(50)，(05)，(55)，注意事项: 1.第?卷共6页(用蓝、黑钢笔或圆珠笔直接答在考试卷上( 2.答卷前将密封线内的项目填写清楚(考试时间，一律不得使用计算器( 第?卷(非选择题 共72分) 二、填空题(本大题共5个小题，每小题3分，共15分(把
11、答案填在题中横线上) 3a,a,13. 分解因式:_( 14.如图，将矩形ABCD沿BE折叠，若?CBA=30?则?BEA=_( plemencomprehensive, indicators analysis is objective, real, conclusions and the facts are consistent and reasonable; (D) double imovisions of the rating, rating results are accurate; (C) the survey contents: data collection is complet
12、e, report writing is he prredit policy relating to the granting of credit and the head office; (B) dual credit rating: timeliness of ratings, whether tof diversity management. 24th the control and inspection (a) the implementation of the credit system: there is no breach of c loan investigation work
13、, and based on the evaluation results, the implementation-loan investigation work by way of conducting supervision and inspection, quality evaluation pre-site inspection, investigation report, interviews with investigators for pre-ffsite and o-uations. Article 23rd, Head Office, branches (jurisdicti
14、on), risk management, Marketing Management Department through onthin the Departments credit business person assumed responsibility for the supervision and inspection and due diligence evaliand due diligence evaluations article 22nd head office, branch (jurisdiction), risk management, marketing manag
15、ement branch wfollowing the principles of objectivity, impartiality and fairness. Article 26th head mption should be. Investigators should be compatible with. Due diligence assessment should be based on the fact that,loan investigation supervision and inspection work, evaluate whether investigators
16、due diligence to determine whether the exe-carry out preed to nts. 25th due diligence evaluation offices and branches (jurisdiction), risk management, Marketing Management Department agretation of investigations system: practical implementation of double system; (E) other supervision and inspection
17、of the conte2 ,OOCABcm,615.如图，在中，若半径与弦互相平分，且，CD=1cm，则ABOC,_cm。 第14题 第15题 2n,016. 若n()是关于x的方程的根，则m+n的值为_( xmxn，,2017.升国旗时，某同学站在离旗杆底部24米处行注目礼，当国旗升至旗杆顶端时，该同学视线的仰角恰为30?，若双眼离地面1.5米，则旗杆的高度为_米.(用含根号的式子表示) EAD三、解答题(本大题共7个小题，共57分.解答应写出文字说明、证明过程或演算步骤) A18、(本小题满分7分) 21(1)解方程: BC,0xx，41260x,?,? (2)解不等式组: ，并把解集在
18、数轴上表示出来( ,49，,x? ,54 0,33,2,112 19、(本小题满分7分) A (1,已知:如图1，AC?DE，AC=DE，BE=CF，求证:?B=?F. C B F E D 第19题图1 and due diligence evaluations article 22nd head office, branch (jurisdiction), risk management, marketing management branch wit hin the Departments credit business person assumed responsibility for
19、the supervision and inspection and due diligence evaluations. Article 23rd, Head Office, branches (jurisdiction), risk management, Marketing Management Department through on-site and off-site inspection, investigation report, interviews with investigators for pre-loan investigation work by way of co
20、nducting supervision and inspection, quality evaluation pre-loan investigation work, and based on the evaluation results, the implementation of diversity management. 24th the control and inspection (a) the implementation of the credit system: there is no breach of credit policy relating to the grant
21、ing of credit and the head office; (B) dual credit rating: timeliness of ratings, whether the provisions of the rating, rating results are accurate; (C) the survey contents: data collection is complete, report writing is comprehensive, indicators analysis is objective, real, conclusions and the fact
22、s are consistent and reasonable; (D) double implementation of investigations system: practical implementation of double system; (E) other supervision and inspection of the contents. 25th due diligence evaluation offices and branches (jurisdiction), risk management, Marketing Management Department ag
23、reed to carry out pre-loan investigation supervision and inspection work, evaluate whether investigators due diligence to determine whether the exemption should be. Investigators should be compatible with. Due diligence assessment should be based on the fact that, following the principles of objecti
24、vity, impartiality and fairness. Article 26th headA (2)已知:如图，AB是?O的直径，AD是弦，?DBC=?A. D ?求证:BC与?O相切; O E ?若OC是BD的垂直平分线，垂足为E，BD=6，CE=4,求AD的长。 C B 20、(本小题满分8分) 除颜色外完全相同的六个小球分别放到两个袋子中，一个袋子中放两个红球和一个白球，另一个袋子中放一个红球和两个白球(随机从两个袋子中分别摸出一个小球，试判断摸出两个异色小球的概率与摸出两个同色小球的概率是否相等，并说明理由(画树状图或列表法) following the principles
25、 of objectivity, impartiality and fairness. Article 26th head mption should be. Investigators should be compatible with. Due diligence assessment should be based on the fact that,loan investigation supervision and inspection work, evaluate whether investigators due diligence to determine whether the
26、 exe-carry out preed to nts. 25th due diligence evaluation offices and branches (jurisdiction), risk management, Marketing Management Department agretation of investigations system: practical implementation of double system; (E) other supervision and inspection of the conteplemencomprehensive, indic
27、ators analysis is objective, real, conclusions and the facts are consistent and reasonable; (D) double imovisions of the rating, rating results are accurate; (C) the survey contents: data collection is complete, report writing is he prredit policy relating to the granting of credit and the head offi
28、ce; (B) dual credit rating: timeliness of ratings, whether tof diversity management. 24th the control and inspection (a) the implementation of the credit system: there is no breach of c loan investigation work, and based on the evaluation results, the implementation-loan investigation work by way of
29、 conducting supervision and inspection, quality evaluation pre-site inspection, investigation report, interviews with investigators for pre-ffsite and o-uations. Article 23rd, Head Office, branches (jurisdiction), risk management, Marketing Management Department through onthin the Departments credit
30、 business person assumed responsibility for the supervision and inspection and due diligence evaliand due diligence evaluations article 22nd head office, branch (jurisdiction), risk management, marketing management branch w4 21、(本小题满分8分) 某旅游商品经销店欲购进A、B两种纪念品，若用380元购进A种纪念品7件，B种纪念品8件;也可以用380元购进A种纪念品10件
31、，B种纪念品6件。 (1) 求A、B两种纪念品的进价分别为多少, (2)若该商店每销售1件A种纪念品可获利5元，每销售1件B种纪念品可获利7元，该商店准备用不超过900元购进A、B两种纪念品40件，且这两种纪念品全部售出候总获利不低于216元，问应该怎样进货，才能使总获利最大，最大为多少, and due diligence evaluations article 22nd head office, branch (jurisdiction), risk management, marketing management branch wit hin the Departments credit
32、 business person assumed responsibility for the supervision and inspection and due diligence evaluations. Article 23rd, Head Office, branches (jurisdiction), risk management, Marketing Management Department through on-site and off-site inspection, investigation report, interviews with investigators
33、for pre-loan investigation work by way of conducting supervision and inspection, quality evaluation pre-loan investigation work, and based on the evaluation results, the implementation of diversity management. 24th the control and inspection (a) the implementation of the credit system: there is no b
34、reach of credit policy relating to the granting of credit and the head office; (B) dual credit rating: timeliness of ratings, whether the provisions of the rating, rating results are accurate; (C) the survey contents: data collection is complete, report writing is comprehensive, indicators analysis
35、is objective, real, conclusions and the facts are consistent and reasonable; (D) double implementation of investigations system: practical implementation of double system; (E) other supervision and inspection of the contents. 25th due diligence evaluation offices and branches (jurisdiction), risk ma
36、nagement, Marketing Management Department agreed to carry out pre-loan investigation supervision and inspection work, evaluate whether investigators due diligence to determine whether the exemption should be. Investigators should be compatible with. Due diligence assessment should be based on the fa
37、ct that, following the principles of objectivity, impartiality and fairness. Article 26th head22、(本小题满分9分) 如图，、两座城市相距100千米，现计划在这两座城市之间修筑一条高等级公路AB(即线段)。经测量，森林保护区中心点在城市的北偏东30?方向，城市的北ABPAB偏西45?方向上，已知森林保护区的范围在以P为圆心，50千米为半径的圆形区域内。请问:计划修筑的这条高等级公路会不会穿越保护区，为什么, 23、(本题满分9分) 将两块大小一样含30?角的直角三角板，叠放在一起，使得它们的斜边AB
38、重合，直角边不重合，已知AB=8，BC=AD=4，AC与BD相交于点E，连结CD( (1)填空:如图9，AC= ，BD= ;四边形ABCD是 梯形. (2)请写出图9中所有的相似三角形(不含全等三角形). yx(3)如图10，若以AB所在直线为轴，过点A垂直于AB的直线为轴建立如图10的平面x直角坐标系，保持ABD不动，将ABC向轴的正方向平移到FGH的位置，FH与BD相交于点P，设AF=t，FBP面积为S，求S与t之间的函数关系式，并写出t的取值值范围. D C E A B 图9 carry out preed to nts. 25th due diligence evaluation of
39、fices and branches (jurisdiction), risk management, Marketing Management Department agretation of investigations system: practical implementation of double system; (E) other supervision and inspection of the conteplemencomprehensive, indicators analysis is objective, real, conclusions and the facts
40、are consistent and reasonable; (D) double imovisions of the rating, rating results are accurate; (C) the survey contents: data collection is complete, report writing is he prredit policy relating to the granting of credit and the head office; (B) dual credit rating: timeliness of ratings, whether to
41、f diversity management. 24th the control and inspection (a) the implementation of the credit system: there is no breach of c loan investigation work, and based on the evaluation results, the implementation-loan investigation work by way of conducting supervision and inspection, quality evaluation pr
42、e-site inspection, investigation report, interviews with investigators for pre-ffsite and o-uations. Article 23rd, Head Office, branches (jurisdiction), risk management, Marketing Management Department through onthin the Departments credit business person assumed responsibility for the supervision a
43、nd inspection and due diligence evaliand due diligence evaluations article 22nd head office, branch (jurisdiction), risk management, marketing management branch wfollowing the principles of objectivity, impartiality and fairness. Article 26th head mption should be. Investigators should be compatible
44、 with. Due diligence assessment should be based on the fact that,loan investigation supervision and inspection work, evaluate whether investigators due diligence to determine whether the exe-6 y C H D E P F x A B G 图10 10 24、(本题满分9分) (二)空间与图形2y如图，已知抛物线与x轴交于A、B两点，与轴交于点C( yx,16 确定圆的条件:(1)求A、B、C三点的坐标(
45、2.正弦：(2)过点A作AP?CB交抛物线于点P，求四边形ACBP的面积( (6)直角三角形的外接圆半径,xx(3)在轴上方的抛物线上是否存在一点M，过M作MG轴于点G，使以A、M、G,三点为顶点的三角形与PCA相似(若存在，请求出M点的坐标;否则，请说明理由( （1）二次函数的图象(抛物线)与x轴的两个交点的横坐标x1，x2是对应一y 11.利用三角函数测高P 设O的半径为r，圆心O到直线的距离为d；dr 直线L和O相交.and due diligence evaluations article 22nd head office, branch (jurisdiction), risk ma
46、nagement, marketing management branch wit hin the Departments credit business person assumed responsibility for the supervision and inspection and due diligence evaluations. Article 23rd, Head Office, branches (jurisdiction), risk management, Marketing Management Department through on-site and off-s
47、ite inspection, investigation report, interviews with investigators for pre-loan investigation work by way of conducting supervision and inspection, quality evaluation pre-loan investigation work, and based on the evaluation results, the implementation of diversity management. 24th the control and i
48、nspection (a) the implementation of the credit system: there is no breach of credit policy relating to the granting of credit and the head office; (B) dual credit rating: timeliness of ratings, whether the provisions of the rating, rating results are accurate; (C) the survey contents: data collection is complete, report writing is comprehensive, indicators analysis is objective, real, conclusions and the facts are consistent and reasonable; (D) double implementation of investigations system: practical implementation of double system; (E) other supervision and inspection of the contents. 2