最新武汉市九年级四月调考数学模拟试题+-+副本优秀名师资料.doc

2015年4月武汉市九年级四月调考数学模拟试题 - 副本2015年4月武汉市九年级数学四月调考模拟试题(一) 钟丹 一、选择题(共10小题，每小题3分，共30分) 1(在实数,1、0、-2、3中，最小的实数是( ) A(,1 B(0 C(-2 D(3 x,32(若代数式在实数范围内有意义，则x的取值范围是( ) A(x?,3 B(x,3 C(x?3 D(x?3 3、下列计算错误的是( ) 393,A. B. C. D. 532333,(5)(3)2,273,4、在一次中学生田径运动会上，参加男子跳高的15名运动员的成绩如下表所示: 成绩(m) 1.50 1.60 1.65 1.70 1.75 1.80 人数 1 2 4 3 3 2 这些运动员跳高成绩的中位数和众数分别是( ) A.1.65，1.70 B.1.70，1.70 C.1.70，1.65 D.3，4 5、下列计算正确的是( ) 63222362aaa,23aaa,A. B. C. D. ()aa,(4)(4)4aaa，,6(如图，A(0,3),B(4,2)，以点0为位似中心线段AB扩大到原来的2倍得到线段CD,则D点的坐标为( ) A.(8,3) B.(8,4)C.(0,6) D.(2,1) 7.图中几何体的主视图是( ) 8.某市教育行政部门为了解初中学生参加综合实践活动的情况，随机抽取了本市七年级、八年级、九年级各500名学生进行了调查，调查结果如图所示.如果本市有90000名初中学生，请你根据图中的信息，估计参加科技活动的学生约有( )名. A.5700 B.570 C.300 D.3000 1 9(观察上面的图形，它们是按一定规律排列的，依照此规律，第( )个图形共有120 个。 A. 10 B. 13 C. 15 D. 16 10.如图，?AOB=60?，点P是半径为2的弧AB上一动点，点M、N分别在半径OA、OBA上，则?PMN的周长最小值是( ) PM2343A.2 B. C.4 D. OBN二、填空题(共6小题，每小题3分，共18分) 311(计算;分解因式:= ; a,a12(2015羊年春晚在某网站取得了最高同时在线人数超14 000 000的惊人成绩，创下了全球单平台网络直播纪录。其中，14 000 000用科学计数法可表示为 ; 13(有三张正面分别写有数字,1，1，2的卡片，它们背面完全相同，现将这三张卡片背面朝上洗匀后随机抽取一张，以其正面数字作为a的值，然后再从剩余的两张卡片随机抽一张，)在第二象限的概率为 ; 以其正面的数字作为b的值，则点(a，b14、甲、乙两车分别从A地将一批物品运往B地，再返回A地，如图表示两车离A地的距离S(千米)随时间t(小时)变化的图像，已知乙车到达B地后以30千米/小时的速度返回.请根据图像中的数据回答:甲车与乙车在距离A地 远处迎面相遇; s/千米甲 乙 C48 30 AO BPt/小时 O1.02.4 第16题图 第14题图 第15题图 15(如图，点A(m，6)，B(n，1)在反比例函数图象上，AD?x轴于点D，BC?x轴于点C，DC=5(线段DC上有一点E，当?ABE的面积等于5时，点E的坐标为 ; 2 16(如图，AB是?O的直径，延长OB至P，使BP=OB，点C为圆上除A、B外的任一点(设?PCB=，?POC=(则tantan的值为 . 三、解答题(共8小题，共72分) 17(本题8分)已知直线y,2x,b经过点(1，,1)，求关于x的不等式2x,b?0的解集 18.(本题8分)如图1，在?ABC中，AB,AC，点D是BC的中点，点E在AD上( (1)求证:BE,CE;(4分) (2)若BE的延长线交AC于点F，且BF?AC，垂足为F，如图2，?BAC,45?; 求证:?AEF?BCF(4分) A A E F E B D C B D C (第18题图1) (第18题图2) 19.(本题8分)如图，在平面直角坐标系中，?ABC的三个顶点都在格点上，点A的坐标为(2，4)，请解答下列问题: (1)画出?ABC关于x轴对称的?ABC，并直接写出点A的坐标(4分) 1111(2)画出?ABC绕原点O旋转180?后得到的?ABC，若?ABC内一点P的坐标为111222111(a,b)，请直接写出点P在?ABC内对应点P的坐标(4分) 2223 20.(本题8分)某班开展电子小报制作比赛，评分结果只有60,70,80,90,100五种分数，现对份数及成绩进行整理，制成如下两幅不完整的统计图。 (1)该班备分数对应小报份数的极差为 ，请将条形统计图补充完整; (2)该班准备将得分为100分的小报中随机选两份交到学校参与评选，已知得分为100分的小报中，男女生的作品各占一半，请用画树形图或列表法中的一种，求出选出的两份小报恰好为一名男生、一名女生作品的概率。 21.(8分)如图，等腰?ABC内接于?O，AB=BC，外角?EAC的平分线交?O于D点，DB交AC于点E. ?求证:?DAB?DFC; 3DA?若，求的值. cos，,BACDB422.(本题10分)我区某电子器件厂商投产一种新型电子产品，每件制造成本为18元，在x试销过程中发现，每月销售量(万件)与销售单价(元)之间的关系可以近似地看作一y次函数y,2x，100(利润=售价,制造成本) Wx(1)写出每月的总利润(万元)与销售单价(元)之间的函数关系式;(3分) 4 (2)当销售单价为多少元时，厂商每月能获得350万元的利润,当销售单价为多少元时，厂商每月能获得最大利润,最大利润是多少,(4分) (3)根据相关部门规定，这种电子产品的销售单价不能高于32元，如果厂商要获得每月不低于350万元的利润，那么制造出这种产品每月的最低制造成本需要多少万元,(3分) 23.(10分)在?ACB中，?ACB=90?，CDAB于D，点E在AC上，BE交CD于点G，,CEFBE交AB于点F. ,?如图1，AC=BC，点E为AC的中点，求证:EF=EG; EG BADF 图1 ?如图2，BE平分?CBA，AC=2BC. C试探究线段EF与EG的数量关系，并证明你的结论. EG A BFD图2 5 1224、(本题12分)如图1，抛物线的顶点A在x轴正半轴上，抛物线与y轴交y,(x,m)4于点B(0,1)，连接AB。 (1)求抛物线的解析式; (2)如图2，将直线AB向上平移，分别交抛物线于M、N两点，交y轴、x轴于E、F两点，若ME=NF，求直线MN的解析式; (3)如图3，P为AB延长线上一点，PH?x轴于H，将?PAH沿直线AB翻折得到?PQA，QA交y轴于点C，若点Q恰好在抛物线上，求Q点坐标。 6 参考答案及评分说明 一、选择题 CCBCA BCACB 二、填空题 711、 12、1.4×10 a(a，1)(a,1)113、 14、40.8千米 315、(5，0)解答如下: 由题意得:，解得:，?A(1，6)，B(6，1)， 设反比例函数解析式为y=，将A(1，6)代入得:k=6，则反比例解析式为y=; 设E(x，0)，则DE=x,1，CE=6,x，?AD?x轴，BC?x轴，?ADE=?BCE=90?， 连接AE，BE，则S=S,S,S?四边形?ABEABCDADEBCE =(BC+AD)DC,DEAD,CEBC=×(1+6)×5,(x,1)×6,(6,x)×1 =,x=5，解得:x=5，则E(5，0)( 116、 33x,17、b=3, (b的值、x的范围各占4分) 218、证明:(1)?AB,AC，D是BC的中点，?BAE,?CAE( 在?ABE和?ACE中，?AB,AC，?BAE,?CAE，AE,AE， ?ABE?ACE(?BE,CE( (运用垂直平分线的性质说明也可, -(4分) ?，BF?AF， (2)?BAC,45?ABF为等腰直角三角形(?AF,BF(由(1)知AD?BC，?EAF,?CBF( 在?AEF和?BCF中，AF,BF，?AFE,?BFC,90?，?EAF,?CBF， ?AEF?BCF( -(4分) 19、解:(1)如图所示:点A的坐标(2，,4);(作图3分，坐标1分) 1(2)如图所示，P点的对应点P的坐标为(,a，-b)(作图2分，坐标2分) 20、解:(1)40 (2)P=2/3( 7 21.(1)证:?DA平分?EAD ?EAD,?CAD=?CBD,?BCD ?DB=DC 又 AB=AC ?ABD,?FCD ?DAB?DFC-(4分) (2)证:连OB交AC于M，则OB?ACAM=AC ，。3 ?若=AM/BM， cos，,BAC4设AM=CM=3x,则AB=BC=CF=4x ?AF=2x 证?OAF?DBC ?DA/DB=AF/BC=2x/4x=1/2-(8分) 222、(1) W,(x,18)y,(x,18)(,2x，100),2x，136x,18002W?与之间的函数解析式为;-(3分) W,2x，136x,1800x2W,350(2)由，得350,2x，136x,1800， 解这个方程得。所以，销售单价定为25元或43元， x,25,x,431222由，得: W,2x，136x,1800,2(x,34)，512当销售单价为34元时，每月能获得最大利润，最大利润是512万元;(7分) 2W,2x，136x,1800(3)结合(2)及函数的图象(如图所示)可知， W当25?x?43时?350， 又由限价32元，得25?x?32，根据一次函数的性质， 得x中随的增大而减小， y,2x，100yx?当=32时，每月制造成本最低(最低成本是18×(,2×32+100)=648(万元)，因此，所求每月最低制造成本为648万元(-(10分)(可不画图叙述有理即可) 23、(1)证:连ED,易证?EAF?EDG-(3分) ?EF=EG (2)证:易证EF/EG= /2-(7分) (3)AE/EC=1/5-(10分) 8 24、 9 (英文版 ) Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of comprehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen inner-party supervision of major initiatives. The two regulations supporting each other, the < code > adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard; < rule > around the party discipline, disciplinary ruler requirements, listed as "negative list, focusing on vertical gauge, draw the party organizations and Party members do not touch the" bottom line ". Here, the main from four square face two party rules of interpretation: the first part introduces two party Revised regulations the necessity and the revision process; the second part is the interpretation of the two fundamental principles of the revision of laws and regulations in the party; the third part introduces two party regulations modified the main changes and needs to grasp several key problems; the fourth part on how to grasp the implementation of the two regulations of the party. < code > and < Regulations > revised the necessity and revised history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines > and < Chinese Communist Party discipline and Punishment Regulations > column 1 by 2015 to strengthen 10 party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of the whole party, ideological consensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity of inheritance and innovation; follow the correct direction, grasp the limited goals, adhere to the party's leadership, to solve the masses of the people reflect a focus on the problem. The new revision of the < code > and < rule >, reflects the party's 18 and the eighth session of the third, the spirit of the fourth plenary session, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the party's eighteen years comprehensive strictly practice. (a) revised two regulations of the party need of < the ICAC guidelines > in < in 1997 Leaders as members of the Communist Party of China clean politics certain criteria (Trial) > based on revised, the promulgation and implementation of January 2010, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly administering the deepening, has not been able to fully meet the actual needs. Content is too complicated, "eight prohibition, 52 are not allowed to" hard to remember, and also difficult to put into practice; the second is concisely positive advocated by the lack of prohibited provisions excessive, no autonomy requirements; the third is banned terms and discipline law, both with the party discipline, disciplinary regulations 11 repeat and Criminal law and other laws and regulations repeat; the fourth is to "clean" the theme is not prominent, not for the existing problems, and is narrow, only needle of county-level leading cadres above. < rule > is in 1997 < Chinese Communist Party disciplinary cases (Trial) > based on revision, in December 2003 the promulgation and implementation, to strengthen the construction of the party play very important role. Along with the development of the situation, which many provisions have been unable to fully meet the comprehensive strictly administering the practice needs. One is Ji law, more than half of the provisions and criminal law and other countries laws and regulations Repetition; two is the political discipline regulations is not prominent, not specific, for violation of the party constitution, damage the authority of Party Constitution of misconduct lack necessary and serious responsibility to pursue; third is the main discipline for the leading cadres, does not cover all Party members. Based on the above situation, need to < the criterion of a clean and honest administration > and < rule > the two is likely to be more relevant regulations first amendment. By revising, really put the authority of Party discipline, the seriousness in the party tree and call up the majority of Party members and cadres of the party constitution of party compasses party consciousness. (II) two party regulations revision process the Central Committee of the Communist Party of China attaches great importance to two regulations revision . Xi Jinping, general books recorded in the Fifth 12 Plenary Session of the eighth session of the Central Commission for Discipline Inspection, on the revised regulations < > made clear instructions. According to the central deployment, the Central Commission for Discipline Inspection from 2014 under six months begin study two regulations revision. The Standing Committee of the Central Commission for Discipline Inspection 4 review revised. Comrade Wang Qishan 14 times held a special meeting to study two regulations revision, amendment clarifies the direction, major issues of principle, path and target, respectively held a forum will listen to part of the province (area) secretary of the Party committee, Secretary of the Discipline Inspection Commission, part of the central ministries and state organs Department The first party committee is mainly responsible for people, views of experts and scholars and grassroots party organizations and Party members. Approved by the Central Committee of the Communist Party of China, on 7 September 2015, the general office of the Central Committee of the Party issued a notice to solicit the provinces (autonomous regions, municipalities) Party, the central ministries and commissions, state ministries and commissions of the Party (party), the General Political Department of the military, every 3 people organization of Party of two regulations revision opinion. Central Commission for Discipline Inspection of extensive solicitation of opinions, careful study, attracting, formed a revised sent reviewers. In October 8 and October 12, Central Committee Political 13 Bureau Standing Committee and the Political Bureau of the Central Committee After consideration of the two regulations revised draft. On October 18, the Central Committee of the Communist Party of China formally issued two regulations. Can say, two laws amendment concentrated the wisdom of the whole party, embodies the party. Second, < code > and < Regulations > revision of the basic principles of two party regulations revision work and implement the party's eighteen, ten eight plenary, the spirit of the Fourth Plenary Session of the Eleventh Central Committee and General Secretary Xi Jinping important instructions on the revised < low political criterion > and < Regulations >, highlighting the ruling party characteristics, serious discipline, the discipline quite in front of the law, based on the current, a long-term, advance as a whole, with Bu Xiuding independent < rule > and < rule >. Main principle is: first, adhere to the party constitution to follow. The constitution about discipline and self-discipline required specific, awaken the party constitution of party compasses party consciousness, maintaining the authority of the constitution. General Secretary Xi Jinping pointed out that "no rules, no side round. Party constitution is the fundamental law, the party must follow the general rules. In early 2015 held the eighth session of the Central Commission for Discipline Inspection Fifth Plenary Session of the 16th Central Committee, Xi Jinping again pointed out that constitution is the party must follow the general rules, but also the general rules." the revision 14 of the < code > and < rule > is Method in adhere to the regulations established for the purpose of combining rule of virtue is to adhere to the party constitution as a fundamental to follow, the constitution authority set up, wake up the party constitution and party rules the sense of discipline, the party constitution about discipline and self-discipline specific requirements. 4 second is to adhere to in accordance with the regulations governing the party and the party. The Party of rule of virtue "de", mainly refers to the party's ideals and beliefs, excellent traditional style. The revised the < code > closely linked to the "self-discipline", insisting on the positive initiative, for all members, highlight the "vital few", emphasized self-discipline, focusing on the morality, and the majority of Party members and the ideological and moral standards. The revised < > Ji method separately, Ji, Ji Yan to Method, as a "negative list", emphasizing the heteronomy, focusing on vertical gauge. Is this one high and one low, a positive reaction, the strict party discipline and practice results transformation for the integration of the whole party to observe moral and discipline requirements, for the majority of Party members and cadres provides benchmarking and ruler. Third, insist on to. In view of the problems existing in the party at the present stage, the main problems of Party members and cadres in the aspect of self-discipline and abide by the discipline to make clearly defined, especially the party's eighteen years strict political discipline and political rules, organization and discipline and 15 to implement the central eight provisions of the spirit against the four winds and other requirements into Disciplinary provisions. Not one pace reachs the designated position, focusing on in line with reality, pragmatic and effective. After the revision of major changes, major changes in the < code > and < rule > modified and needs to grasp several key problems (a) < code > < code > adhere to according to regulations governing the party and party with morals in combination, for at the present stage, the leadership of the party members and cadres and Party members in existing main problems of self-discipline, put forward principles, requirements and specifications, showing Communists noble moral pursuit, reflected at all times and in all over the world ethics from high from low 5 common requirements. One is closely linked to the "self-discipline", removal and no direct relation to the provisions of . the