最新南通中考数学模拟8优秀名师资料

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1、2012年南通中考数学模拟8一、选择题(每题4分，共48分) ,11(的相反数是( ) 211A( B( C( D( ,2,2222(下列计算正确的是( ) 2(3)3,A(234265，, B(842, C(2733, D( 3(如图所示零件的左视图是( ) 正面, 第3题图 A( B( C( D( 4(2008年5月12日，四川汶川发生了特大地震(震后，国内外纷纷向灾区捐物捐款，截至5月26日12时，捐款达308.76亿元(把它用科学记数法表示为( ) 910111130.87610，3.087610，0.3087610，3.087610，A(元 B(元 C(元 D(元 5.如图，把线段A

2、B平移，使得点A到达点C(4，2)，点B到达点D，那么点D的坐标是( ) A. (7,3) B. (6,4) C. (7,4) D. (8,4) 6.某射击小组有20人，教练根据他们某次射击的数据绘制成如图所示的统计图，则这组数据的众数和中位数分别是( ) ,(7、7 ,(8、7.5 ,(7、7.5 ,( 8、6.5 AB O(7题图) (5题图) (6题图) 7.如图，?O中，弦AB的长为6cm，圆心O到AB的距离为4cm，则?O的半径长为( ) A.3cm B.4cm C.5cm D.6cm nm，5n，323m,8. 若与是同类项,则( ) 2yx,3xy11,A. B. C.1 D.-

3、2 22and 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 diligence evaluations. Article 23rd, Head Office, branches (

4、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 evaluation pre-loan investigation work, and based on t

5、he 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 credit rating: timeliness of ratings, whether the provi

6、sions 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 impl

7、ementation 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 supervision and inspection work, evaluate whether investig

8、ators 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 head 9(一个口袋中有3个黑球和若干个白球，在不允许将球倒出来数的前提下，小明为估计其中的白球数，采用

9、了如下的方法:从口袋中随机摸出一球，记下颜色，然后把它放回口袋中，摇匀后再随机摸出一球，记下颜色，不断重复上述过程(小明共摸了100次，其中20次摸到黑球(根据上述数据，小明可？估计口袋中的白球大约有( ) A(18个 B(15个 C(12个 D(10个 2210(若关于x的一元二次方程(m-1)x+5x+m-3m+2=0有一个根为0，则m的值等于( ) A. 1 B. 2 C. 1或2 D. 0 11(小亮早晨从家骑车到学校，先上坡后下坡，行程情况如图所示(若返回时上坡、下坡的速度仍保持不变，那么小明从学校骑车回家用的时间是( ) A(37.2分钟 B(48分钟 C(30分钟 D(33分钟

10、y 路程(百米) GC D 96 F H 36 AB E 0 30 18 时间(分钟) x (第15题图) (11题图) (12题图) k，y,k,03212(如图，第四象限的角平分线OM与反比例函数的图象交于点A，已知OA=，则该x函数的解析式为( ) 3939y,y,y,y,A( B( C( D( xxxx二、填空题(每题3分，共15分) 2a,4,13(化简: 2aa，4414(已知一个圆锥体的底面半径为2，母线长为4，则它的侧面展开图面积是 (结果保留) ,ABCDEFGH，ABBDCDAC，EFGH15(如图，在四边形中，分别是的中点，要使四边形ABCD是菱形，四边形还应满足的一个条

11、件是 16(如图，D、E为?ABC两边AB、AC的中点，将?ABC沿线段DE折叠，使点A落在点F处，若?B=55?，则?BDF= ?. 17(如果一个数等于它的不包括自身的所有因数之和，那么这个数就叫完全数(例如，6的不包括自身的n6123,，21,所有因数为1，2，3(而且，所以6是完全数(大约2200多年前，欧几里德提出:如果n,1n是质数，那么是一个完全数，请你根据这个结论写出6之后的下一个完全数是 2(2,1)三、解答题(共57分) and due diligence evaluations article 22nd head office, branch (jurisdiction)

12、, risk management, marketing management branch within 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 a

13、nd off-site 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 contr

14、ol 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 credit rating: timeliness of ratings, whether the provisions of the rating, rating results are accurate; (C) the survey contents: data c

15、ollection 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

16、. 25th due diligence evaluation offices and branches (jurisdiction), risk management, 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 s

17、hould be compatible with. Due diligence assessment should be based on the fact that, following the principles of objectivity, impartiality and fairness. Article 26th head 231x，,218(7分)(1)解方程:( (2)若不等式组整数解是关于的xx,50x,1xx,(3),224xax,方程的根，求的值( a19(7分)(1)已知:如图，B、E、F、C四点在同一条直线上， AB,DC，BE,CF，?B,?C( 求证:OA,O

18、D( ,BCOODBC,ABD，,ABC30(2)如图2，已知是?O的直径，是弦，(过圆心作交弧BC于点，DC连接，求?DCB的度数 D C B A O 图2 20. (8分)有2个信封，每个信封内各装有四张卡片，其中一个信封内的四张卡片上分别写有1、2、3、4and due diligence evaluations article 22nd head office, branch (jurisdiction), risk management, marketing management branch within the Departments credit business person

19、 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 for pre-loan inv

20、estigation 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 breach of credit

21、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, re

22、al, 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 management, Market

23、ing 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 fact that, followi

24、ng the principles of objectivity, impartiality and fairness. Article 26th head 四个数，另一个信封内的四张卡片分别写有5、6、7、8四个数，甲、乙两人商定了一个游戏，规则是:从这两个信封中各随机抽取一张卡片，然后把卡片上的两个数相乘，如果得到的积大于20，则甲获胜，否则乙获胜( (1)请你通过列表(或画树状图)计算甲获胜的概率( (2)你认为这个游戏公平吗,为什么,如何修改规则使游戏公平, 21.(8分)某厂工人小王某月工作的部分信息如下: 信息一:工作时间:每天上午8?2012?00，下午14?0018?00，每月

25、25天; 信息二:生产甲、乙两种产品，并且按规定每月生产甲产品的件数不少于60件( 生产产品件数与所用时间之间的关系见下表: 生产甲产品件数(件) 生产乙产品件数(件) 所用总时间(分) 10 10 350 30 20 850 信息三:按件计酬，每生产一件甲产品可得1.50元，每生产一件乙产品可得2.80元( 根据以上信息，回答下列问题: (1)小王每生产一件甲种产品，每生产一件乙种产品分别需要多少分, (2)小王该月最多能得多少元,此时生产甲、乙两种产品分别多少件, A45?DECAB，AB22(9分)如图所示，两地之间有条河，原来从地到地需要经and due diligence evalu

26、ations 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 diligence evaluations. Article 23rd, Head Office, branches (jurisdiction), risk managem

27、ent, 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 evaluation pre-loan investigation work, and based on the evaluation results, the

28、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 credit rating: timeliness of ratings, whether the provisions of the rating, rating

29、 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

30、; (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 supervision and inspection work, evaluate whether investigators due diligence to dete

31、rmine 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 head F37?23.53.11加与减（一）4 P4-12BDCADCB,过桥，沿折线到达(现在新建了桥，可直接沿直线从地到达地(已EFABAB对圆的定义的理

32、解：圆是一条封闭曲线，不是圆面；,BC,11kmDC知，桥和平行，则现在从地到地可比原来少走多少路ABAB，,A45，,B37(三)实践活动,程,(结果精确到0.1km(参考数据:，) sin370.60?cos370.80?21.41?(一)情感与态度：,Rt?ABCAB,6AC,8DE，ABAC，P23(9分)如图，在中，,A90，分别是边的中点，点ACDDEP从点出发沿方向运动，过点作于，过点作交于 PQBC,QQQRBA?CRP，当点与点重合时，点停止运动(设，( QBQx,QRy,BCDDH(1)求点到的距离的长; 4.垂径定理：垂直于弦的直径平分这条弦，并且平分弦所对的两条弧。(2

33、)求y关于的函数关系式(不要求写出自变量的取值范围); xP(3)是否存在点，使为等腰三角形,若存在，请求出所有满足要求的的值;若不存在，请说x?PQR(3) 扇形的面积公式:扇形的面积 (R表示圆的半径, n表示弧所对的圆心角的度数)A 明理由( R E P D 4.二次函数的应用： 几何方面C B H Q 若a0，则当x时，y随x的增大而减小。ECCF，,8B(16,12)24(9分)如图，在矩形ABCD中，E、F分别是OC、BC上的动点，( and due diligence evaluations article 22nd head office, branch (jurisdicti

34、on), risk management, marketing management branch within 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-sit

35、e and off-site 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 co

36、ntrol 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 credit rating: timeliness of ratings, whether the provisions of the rating, rating results are accurate; (C) the survey contents: dat

37、a 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 conte

38、nts. 25th due diligence evaluation offices and branches (jurisdiction), risk management, 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. Investigator

39、s should be compatible with. Due diligence assessment should be based on the fact that, following the principles of objectivity, impartiality and fairness. Article 26th head ，,:AFB60?当时，沿着直线AF折叠，折叠后，落在平面内G点处，求G点的坐标( ,ABF?当F运动到什么位置时，的面积最小，最小为多少, ,AEF?当的面积最小时，直线EF与y轴相交于点M，P点在x轴上，?P与直线EF相切于点M，,AEF求P点的坐

40、标( y推论2:直径所对的圆周角是直角；90的圆周角所对的弦是直径；ABF xOEC九年级数学下册知识点归纳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 diligence

41、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 eval

42、uation 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 credi

43、t 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 imple

44、mentation 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 supervis

45、ion 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 head