2012-2013学年度第一学期期末考试八年级数学试题

1、position-related consumption of civil servants has been swept by finance, consumer, regardless of cost, extravagance and waste in the civil service position-related consumption, abuse, corruption and embezzlement, corruption is important. Then, under the conditions of market economy, how to reform t

2、he existing civil duty consumption management, explores a source to prevent and curb the post consumption corruption way, is currently a major issue faced by honest work. Recently, I conducted research on this issue, this problem on some humble opinions. First, the existing public servants duty cons

3、umption the main problems seen from the investigation and reasons, in recent years, public servants duty consumption caused by the abuses and not a person of integrity, is one of the major problems in the party in Government, its operation order have a negative effect on the party and Government org

4、ans, seriously damaging the image of the party and the Government, undermining the relationship between party and the masses, effect, opening up and economic construction. From I County in recent years of governance situation see, positions consumption in the produced of two not phenomenon rendering

5、 four a features: a is positions consumption system lost has due of binding, right is greater than rules, and right is greater than method of phenomenon more highlight; II is in positions consumption in the Camera Obscura operation, using terms, will positions consumption into has personal consumpti

6、on, will corporate points to into personal points to, makes positions consumption in some aspects has into positions enjoy and self-dealing of means; three is to positions consumption for name, fraud, false impersonator, Trend of negative corruption phenomena such as corruption and misappropriation;

7、 four palaces, follow the fashion, rivalries, wasteful, and post consumption became a symbol of showing off their individual capacities. Caused by public servants duty consumption of many two phenomenon in which people reflect the biggest problems are: (a) the official car problems. Mainly in three

8、aspects: one is the larger buses cost expenditure. According to statistics, until November 2003, XX County township Department bus 159 cars, which department owns the bus 145 vehicles, and showed an increasing trend. Financial expenses cost per bus per year to 35,000 yuan, and in fact every cost up

9、to 50,000 yuan. Some units also hiring temporary drivers and expenditure on wages and subsidies. Necessary to keep a car, but also dependants, leading to larger expenses. Second, gongchesiyong breed unhealthy tendencies. Some people believe that now some bus drivers use one-third, one-third leading

10、private one-third used for official purposes. Some public servants, especially leading officials motoring, cars for private purposes, violating the self-discipline regulations, and even lead to traffic accidents. According to statistics from related departments, since 2004, the correct investigation

11、 in our County serves nearly 30 cars for private purposes, only the first half of this year, cars for private purposes or2012-2013学年度第一学期期末考试八年级数学试题亲爱的同学，在你答题前，请认真阅读下面以及“答题卡”上的注意事项：1、本试卷由选择题和非选择题两部分组成，全卷共6页，满分120分，考试用时120分钟；编辑人：丁济亮2、答题前，请将你的姓名、准考证号填写在“答题卡”上相应位置；3、答选择题时，选出每小题答案后，用2B铅笔把“答题卡”上对应题目的答案标号

12、涂黑，如需改动请用橡皮擦干净后，再选涂其他答案，答在“试题卷”上无效；4、非选择题用黑钯墨水签字笔书写在“答题卡”上，答在“试题卷”上无效；预祝你取得优异成绩！第卷（选择题 共36分）一、选择题（共12小题，每小题3分，共36分）下列答题中均有四个备选答案。其中有且中有一个正确，请在答题卷上将正确答案代号涂黑。1化简等于ABCD在函数中,自变量x的取值范围是Ax-1 Bx1 Cx1 Dx13下列各点中在函数的图象上的点是A（，）B（，）C（，）D（，）下列函数中y随x增大而减小的是Ay=2x By=-2xCy=2x+1Dy=2x-15点(1,2)关于x轴对称的点的坐标是A(-1,-2) B(-

13、1,2)C(1,-2)D(1,2)6如图,ABC和ABC关于直线l对称,则B的度数为A30B50 C90 D1007如图,已知AB=CD,那么添加下列一个条件后,仍无法判定ABCADC的是ACB=CD BBAC=DAC CBCA=DCA DB=D=908下列计算正确的是A B C D9一次函数y=ax-1(aax-3的解集是 ;16如图,AOB=30,点P为AOB内一点PO=10,点Q在OA边上,点R在OB边上,则PQR的周长的最小值为 .三解答题(共9小题,共72分)17(本题满分6分)计算:18 . (本题满分6分)先化简,再求值:,其中x=-1,y=219(本题满分6分)如图,AD与BC

14、交于点O, OA=OD,OB=OC,求证:ABCD20(本题满分8分)分解因式:(1)(2)21(本题满分7分)如图,已知ABC的三个顶点的坐标分别为A(-2,3),B(-6,0),C(-1,0)(1)画出ABC关于y轴对称的A1B1C1,则点A的对应点A1的坐标为( , ),点B的对应点B1的坐标为( , );(2)画出ABC关于直线y=x对称的A2B2C2,则点A的对应点A2的坐标为( , ).22(本题满分7分)已知直线l与x轴交于点A(-2,0),与y轴交于点B(0,1).(1)求直线l的解析式;(2)若点P在直线l上,点C(1,0),PAC的面积等于6,求点P的坐标.23(本题满分1

15、0分)A城有肥料100吨,B城有肥料300吨,现要把这些肥料全部运往C、D两乡,从A城往C、D两乡运肥料的费用分别为每吨20元和25元,从B城往C、D两乡运肥料的费用分别为每吨15元和24元,现在C乡需要肥料240吨,D乡需要肥料260吨,设从A城往C乡运x吨肥料,从A城B城往C、D两乡运肥料的总费用为y元.(1)求y与x之间的函数关系式,并直接写出自变量x的取值范围；(2)当从A城往C乡运多少吨肥料时,总费用最小,说明理由;(3)若从A城往C乡运肥料的费用每吨下调a(0a6)元,你认为该怎样调动可使总费用最少?24(本题满分10分)在RtABC中,ACB=90,AC=BC.(1)如图1,若点

16、D为BC的中点,点D关于AB的对称点为点F,连AF.BF.CF.求证:AF=CF;(2)如图2,若点D在CB的延长线上,且BD=BC,CEAD,垂足为点E,BFCB交CE的延长线于点F,连接AF,求AFB的度数.25(本题满分12分)已知直线l1:y=-x+11.(1)将直线l1向下平移3个单位长度,得到直线l2,直接写出直线l2的解析式 ;(2)无论a为什么实数,点Q(a+1,2a-2)都在直线l3上,如果直线l2与直线l3相交,求它们的交点P的坐标;(3)设直线l2与y轴交于点A,过点O和点A分别向直线y=kx+4-4k(k为常数,且k0)作垂线,垂足分别为点M.N,试探究线段OM.AN.

17、MN三者之间的数量关系,并证明你的结论.leaders driving a vehicle accident caused by road accidents, 1, 1 people killed and direct economic losses amounting to more than 100,000 yuan. Third, high efficiency and low cost of the bus. Surveys show that, the operating costs of taxis for the 8200/. Is a fundamental priority

18、 of the reform, it is a difficult problem that must be solved in the reform process. Clearly, the post consumption averages three years before as a base and fine-tuned on the basis of this single practices must be improved. Improvements to adhere to three principles: first, under the existing policy

19、 provisions approved for public servants duty consumption standards, calibration, is not contrary to policy. Second, according to the local financial situation and peoples sustainability, public servants duty consumption standards approved, both financial reach, and people passing through. Third, ac

20、cording to the operational needs of civil servants responsible for authorized public servants duty consumption standards, both high and low positions, but also the nature of the work and the workload. In reform of method Shang, approved civil servants positions consumption standard to big unified, a

21、nd small dispersed suitable, that most positions consumption project should according to policy provides proposed unified standard, consider to ranks, and units and the work task of differences sex, unified of standard should has elastic of and dynamic of, makes regions, and units in implementation

22、unified standard Shi has must of flexible disposal right; but since set of standard must after financial, and audit, sector audit approved Hou to implementation. (C) reform package. Public servants duty consumption elasticity of consumption to limit consumption, turning mess into kitchen after dinne

23、r, follow the civil servant with a how to use personal title subsidies, or how to manage a personal duty consumption use of subsidies. Therefore, we must establish and perfect with public servants duty consumption monetization reform support of the series of governance systems such as the civil service examination of responsibility, system, low fault investigation system, the report said. While other measures to keep up. Discipline inspection and supervision organs, financial, auditing departments should strengthe