人教版2013-2014学年七年级下数学期中考试试题及答案_第1页
人教版2013-2014学年七年级下数学期中考试试题及答案_第2页
人教版2013-2014学年七年级下数学期中考试试题及答案_第3页
人教版2013-2014学年七年级下数学期中考试试题及答案_第4页
人教版2013-2014学年七年级下数学期中考试试题及答案_第5页
已阅读5页,还剩6页未读 继续免费阅读

下载本文档

版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领

文档简介

1、delegates, staff: hello! in the run-up to the spring festival, we held one session of four staff representatives conference 2013-workshop, full back in 2012, careful analysis of the current situation, discuss 2013 development plans. here, on behalf of my company 2013 work reports to the general asse

2、mbly, for consideration. pillar i, 2012 back in 2012, xx power companies adhere to the party's 17 great spirit for guidance, comprehensively implement the scientific concept of development, promoting cost-leadership strategy, standards, focus on implementation, lean management, continuously impr

3、ove, smooth present safety situation of enterprise management, business management and control scientific and standardized, and the dedication of staff, manage a harmonious and democratic atmosphere of the good situation. main indicators are as follows:-the battery indicator: power generation totale

4、d 7.815 billion kwh, beyond the annual budget implementation capacity of 315 million kwh, an increase of 757 million kwh. sales totaled 7.425 billion kwh, exceeding sales of 330 million kwh the annual executive budget, an increase of 729 million kwh. -security measures: unplanned outages 2.5 times.

5、no personal injury accident occurred, no major accident and above, no major fire accidents without environmental pollution accidents, safety for three consecutive years to maintain stability to good posture. business financial indicators: total profits of 255 million yuan, beyond the annual budget o

6、f 207 million yuan, beyond the datang company index 41.89 million yuan, an increase of 1.76 million yuan, fcm assessment at grade four. -energy: power supply standard coal completing 312.25 g/kwh, down 0.1 g/kwh; integrated auxiliary power consumption ratio in 5.12%, down 0.26%; pollutant emissions

7、performance greatly reduced compared to last year, carbon 0.09 g/kwh, sulfur dioxide 0.104 g/kwh nox 0.512 g/kwh; dust removal efficiency of more than 99.8%. -reliability index: equivalent availability factor in 93.47%, increased 7.95% from a year earlier. equivalent forced outage rate 0.08%, 0.16%

8、reduction over the same period a year earlier. major achievements: first, we should adhere to the two "management system" basis, strengthening technological research, strengthen hidden hazards control and intrinsic safety enterprise construction took new steps. -the two "management sy

9、stem" for improvement. focus on promoting the power of the company management system and the application and implementation of the safety loop five-star management system, improve the safety management system, realize the system of safety control. further regulate security routines, safety supe

10、rvision and management network role to play to achieve closed-loop. strengthening the supervision and management of habitual violation of, strengthening the safety supervision of outsourcing contractors. carried out in spring and autumn of security inspections, flood control and inspection, safety p

11、roduction month, day supervision of production safety and the olympic games and other!德州市九中2013-2014学年七年级下学期数学期中考试试题 一、选择题 (本大题共10小题,每小题3分,共30分)1如图所示,1和2是对顶角的是( )a b c d2计算的结果是 ( )a2 b±2 c2 d43实数2,0.3,中,无理数的个数有( )a1个 b2个 c3个 d4个4我们常用如图所示的方法过直线外一点画已知直线的平行线,其依据是()a同位角相等,两直线平行 b内错角相等,两直线平行 c同旁内角互补

12、,两直线平行d两直线平行,同位角相等5估计的值 ( )a在3到4之间 b在4到5之间 c在5到6之间 d在6到7之间6方程组 的解为 ,则被遮盖的两个数分别为 ( )a5,2 b1,3 c2,3 d4,2 7把点(2,一3)先向右平移3个单位长度,再向下平移2个单位长度得到的点的坐标是 ( )a(5,1) b(1,5)c(5,5) d(1,1)8若点p是第二象限内的点,且点p到x轴的距离是4,到y轴的距离是3,则点p的坐标是 ( ) a(4,3) b(4,3) c(3,4) d(3,4)9甲、乙两种商品原来的单价和为100元,因市场变化,甲商品降价10,乙商品提价40,调价后两种商品的单价和比

13、原来的单价和提高了20若设甲、乙两种商品原来的单价分别为x元、y元,则下列方程组正确的是 ( )a bc d第10题图10如图,数轴上表示1、的对应点分别为点a、点b若点a是bc的中点,则点c所表示的数为 ( ) a b c d二、填空题 (本大题共8小题,每小题4分,共32分)11如果用(7,1)表示七年级一班,那么八年级五班可表示成 12计算: 13把命题“等角的补角相等”写成“如果,那么”形式为: 14已知是方程的解,则的值为 15一个正数的两个平方根分别为a3和2a3,则a 16已知2a3b40,则17已知点a(4,3),aby轴,且ab3,则b点的坐标为 .18三个同学对问题“若方程

14、组的解是,求方程组的解”提出各自的想法甲说:“这个题目好象条件不够,不能求解”;乙说:“它们的系数有一定的规律,可以试试”;丙说:“能不能把第二个方程组的两个方程的两边都除以5,通过换元替换的方法来解决”参考他们的讨论,你认为这个题目的解应该是 三、解答题 (本大题共8小题,共58分)19(本题满分8分)(1)解方程:(2)解方程组: 20(本题满分6分)如图,abcd,be平分abc,dcb140°,求abd和edc的度数21(本题满分6分)在y中,当时,y;时,y;时,y,求的值22(本题满分6分)如图,直线ab是某天然气公司的主输气管道,点c、d是在ab异侧的两个小区,现在主输

15、气管道上寻找支管道连接点,铺设管道向两个小区输气有以下两个方案:方案一:只取一个连接点p,使得向两个小区铺设的支管道总长度最短;方案二:取两个连接点m和n,使得点m到c小区铺设的支管道最短,使得点n到d小区铺设的管道最短om (1)在图中标出点p、m、n的位置,保留画图痕迹;(2)设方案一中铺设的支管道总长度为l1,方案二中铺设的支管道总长度为l2,则l1 与l2的大小关系为:l1 l2(填“”、“”或“”)c b da23(本题满分6分)已知:如图abbc,bccd且12,试说明:becfcabdef12解:abbc,bccd(已知) 90°( ) 12(已知) (等式性质) be

16、cf( )24(本题满分8分)与在平面直角坐标系中的位置如图.分别写出下列各点的坐标: ; ; ;说明由经过怎样的平移得到? 若点(,)是内部一点,则平移后内的对应点的坐标为 ;求的面积.25(本题满分8分)如图,deac于点e,bfac于点f,12=180°,试判断agf与abc的大小关系,并说明理由新课 标第 一 网26(本题满分10分)某商场第1次用39万元购进a、b两种商品,销售完后获得利润6万元,它们的进价和售价如下表:(总利润=单件利润×销售量)(1)该商场第1次购进a、b两种商品各多少件?(2)商场第2次以原价购进a、b两种商品,购进b商品的件数不变,而购进a

17、商品的件数是第1次的2倍,a商品按原价销售,而b商品打折销售,若两种商品销售完毕,要使得第2次经营活动获得利润等于72000元,则b种商品是打几折销售的?德州市九中2013-2014学年七年级下学期七 年 级 数 学 答 题 纸(总分120分,时间120分钟)特别提醒:请同学们把答案按要求写在答题纸上规定的黑色矩形区域内,超出答题纸区域的答案无效!一、选择题(本题共10小题,每小题3分,共30分下列各题都有代号为a、b、c、d的四个结论供选择,其中只有一项是符合题目要求的)题号12345678910答案二、填空题(本题共8小题,每小题8分,共32分直接把最后的结果填在横线上,不需写出解答过程)

18、 11_ 12_ 13_ _ 14_15_ 16_ 17_ _ 18_三、解答题(本题共8小题,共56分解答时应在指定区域内写出文字说明、证明过程或演算步骤)19计算(本小题每题4分,满分8分)(1)解方程: (2)解方程组:20(本小题满分6分)21(本题满分6分)22(本题满分6分)(1)c db da(2)l1 l2(填“”、“”或“”)23(本题满分6分)cabdef12解:abbc,bccd(已知) 90°( ) 12(已知) (等式性质) becf( )24(本题满分8分) ; ; ; ;求的面积.25(本题满分7分)26(本题满分9分) 德州市九中2013-2014学年

19、七年级下学期七 年 级 数 学 参 考 答 案一、选择题题号12345678910答案cabacdccbd二、填空题11、(8,5) 12、 13、如果两个角相等,那么这两个角的补角相等或(如果两个角是相等的两个角的补角,那么这两个角相等) 14、315、2 16、13 17、(4,6)或(4,0) 18、三、解答题 19、(1)解: x1±2 (2分) x 3或1 (4分) (2)解: 得:x 1 (2分) 把x 1代入得:y2 (3分)原方程组的解为 (4分)(用代入法解参照给分)20、解: abcdcabc180° (2分)c140°abc40°

20、(3分)又be平分abcabdecb20° (4分)又abcd bdcabd20° (5分)edc180°bdc160° (6分) 21、解: 由题意得: (3分)把c0代入、得: (4分)解得:a1,b3 (5分)a1,b3,c7 (6分)22、解:(1)图略画垂线段各2分,少直角标志扣1分,连接cd 1分 (5分)(2)l1 l2 (6分)23、解:abbc,bccd(已知) (每空1分,共6分) abcdcb90°( 垂直的定义 ) 12(已知) ebc fcb (等式性质)新课 标第 一 网 becf( 内错角相等,两直线平行 )24、

21、解:(1)(3,1); (2,2) ; (1,1) ; (3分) (2)先向左平移4个单位,再向下平移2个单位 或 先向下平移2个单位,再向左平移4个单位 (4分) (3)(a4,b2) (5分)(4)将补成长方形,减去3个直角三角形的面积得: 61.50.522 (8分)(补成其他图形均可,酌情给分)25、解:agfabc (1分)理由如下:deac,bfac afbaed90° (2分)bfde (3分) 23180° (4分)又12180°13 (5分)gfbc (6分)agfabc (7分) (5分)整理得:解得:答:第1次购进a商品200件,b商品150

22、件 (6分) (3分):26、解:(1)设第1次购进a商品x件,b商品y件由题意得: (2)设b商品打m折出售由题意得: (8分)解得:9 (9分)答:b商品打9折销售的主要介绍的是永磁直流电动机;首先简述了永磁电机、永磁直流电动机从产生到到逐步改善的发展过程,以及以此为基础的未来发展的趋势;activities, comprehensive and tamping safety foundation . troubleshooting, management mechanism, give full play to role of technical supervision and real

23、ization of troubleshooting, management, improved process management. this year completed the boiler lower header leakage, boiler pressure, a major risk management, completed 29 of great risks and 3 general problems of governance. complete chemistry lab construction, thermal control, and complete the

24、 boiler scale integrated management, host shafting vibration of 10 scientific and technological projects, such as. complete supercritical 630mw on-line simulation system development and application of circulating water mcc standby power transformation, the transformation of desulfurization waste wat

25、er, the unit water supply system of comprehensive treatment and discharge valve modification of coal mill 5 key technological transformation projects, group health is improved. -science and technology innovation is further increased. strengthen the characteristics of supercritical unit major issues,

26、 gradually clearing the particularity of supercritical unit and regularity. developed motor oil time management, switch action times, statistics, coal-aided measurement software, improves the production level of lean management. increased investment in science and technology, reporting science and t

27、echnology projects and 14 technical project total cost percentage of the total annual production output of 0.25%. "large-scale coal-fired power plant flue gas desulfurization, denitrification complete development and application of key technologies" project, won the national science and te

28、chnology progress second prize. 630mw supercritical units optimized control strategies and the 630mw development and application of on-line simulation system for supercritical units, supercritical 600mw units of turbine driven boiler feed pump set of comprehensive treatment of defects datang technology respectively one or two and third. meanwhile, information technology achievements, the company was named "china power information technology benchmarking e

温馨提示

  • 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
  • 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
  • 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
  • 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
  • 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
  • 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
  • 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

评论

0/150

提交评论