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1、北京市密云区2019 届初三零模考试数 学 试 卷20194 考生须知1本试卷共8 页，共三道大题，28 道小题，满分100 分考试时间120 分钟2在试卷和答题卡上准确填写学校、名称、姓名和考号3试题答案一律填涂或书写在答题卡上，在试卷上作答无效，作图必须使用 2B 铅笔.4考试结束，请将本试卷和答题纸一并交回一、选择题（本题共 16 分，每小题2 分）下面各题均有四个选项，其中只有一个选项是符合题意的.1.2019 年 1 月 3 日上午 10 点 26 分，中国嫦娥四号探测器成功在月球背面软着陆，成为人类首次在月球背面软着陆的探测器，首次实现月球背面与地面站通过中继卫星通信.月球距离地球
2、的距离约为384000km，将 384000 用科学记数法表示为A.53.84 10B.3384 10C.33.84 10D.60.384 102.下图是某个几何体的侧面展开图，则该几何体为A.棱柱B.圆柱C.棱锥D.圆锥3.实数 a，b，c 在数轴上的对应点的位置如图所示，则正确的结论是cba54210-1-2-3-4-53A.a+c0 B.|a|1D.ac0 4.如果2350mm，那么代数式29().3mmmm的值是（）A5 B1 C1 D55.正多边形内角和为540，则该正多边形的每个外角的度数为A36B72C108D3606.如图是北京地铁部分线路图.若车公庄坐标为（-3，3），崇文门
3、站坐标为（8，-2），则雍和宫站的坐标为A.（8，6）B.（6，8）C.（-6，-8）D.（-8，-6）7.权威市调机构IDC 发布了2018 年第四季度全球智能手机出货量报告如下表.手机品牌2018 年第四季度市场出货量（万台）2018 年第四季度市场份额2017 年第四季度市场出货量（万台）2017 年第四季度市场份额Samsung 70.4 18.7%74.5 18.9%Apple 68.4 18.2%77.3 19.6%Huawei 60.5 16.1%42.1 10.7%Xiaomi 29.2 7.8%27.3 6.9%HMD Global 28.6 7.6%28.2 7.1%Oth
4、ers 118.4 31.5%145.3 36.8%总计375.4 100.0%394.6 100.0%根据上表数据得出以下推断，其中结论正确的是A.Huawei 和Xiaomi 2018 年第四季度市场份额总和达到25%B.2018 年第四季度比2017 年第四季度市场份额增幅最大的是Apple 手机C.Huawei 手机 2018 年第四季度比2017 年第四季度市场出货量增加18.4 万台D.2018 年第四季度全球智能手机出货量同比下降约10%8.某通讯公司推出三种上网月收费方式.这三种收费方式每月所收的费用y（元）与上网时间x(小时)的函数关系如图所示，则下列判断错误的是A.每月上网
5、不足25 小时，选择A 方式最省钱B.每月上网时间为30 小时，选择B方式最省钱C.每月上网费用为60 元，选择B方式比 A 方式时间长D.每月上网时间超过70 小时，选择C方式最省钱C方式B方式A方式x(小时)y(元)1207050503025二、填空题（本题共16 分，每小题2 分）9.如图所示的网格是正方形网格,则线段 AB和 CD的长度关系为:AB_ CD（填“”，“”或“=”）ABCD文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS
6、6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2
7、W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码
8、:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3
9、HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 Z
10、B2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档
11、编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S
12、3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T210.分式2xx有意义，则x 的取值范围是 _.11.已知21xy是方程3axby的一组解（0,0ab），任写出一组符合题意的a、b 值，则 a=_，b=_.12.比例规是一种画图工具，利用它可以把线段按一定比例伸长或缩短.它是由长短相等的两脚 AD 和 BC交叉构成的，其中AD 与 BC相交于点O.如图,OA=OB,CD=2，AB=2CD，OC=3，则OB=_.ODCBA13.新能源汽车环保节能，越来越受到消费者的喜爱.某品牌新能源汽车2017 年销售总额为5
13、00 万元，2018 年销售总额为960 万元，2018 年每辆车的销售价格比2017 年降低 1 万元，2018 年销售量是2017 年销售量的2 倍.求 2018 年每辆车的销售价格是多少万元?若设 2018年每辆车的销售价格x 万元，则可列出方程为.14.一般地，如果在一次实验中，结果落在区域D 中的每一点都是等可能的，用A 表示“实验结果落在区域D 中的一个小区域M”这个事件，那么事件A 发生的概率为()P AMD的面积的面积，下图是一个正方形及其内切圆，随机的向正方形内投一粒米，落在圆内的概率为 _.15.如图，AB为 O 的直径，C、D 是 O 上两点，AC=BC，AD 与 CB交
14、于点 E.25DAB，则E=_.OEDCBA文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2
15、W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码
16、:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3
17、HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 Z
18、B2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档
19、编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S
20、3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T216.在平面直角坐标系xoy 中，点 A（-1，2），B（-2，1）将 AOB 绕原点顺时针旋转90后再沿 x 轴翻折，得到DOE，其中点 A 的对应点为点D，点 B 的对应点为点E.则 D 点坐标为_.上面由 AOB
21、得到DOE的过程，可以只经过一次图形变化完成.请你任写出一种只经过一次图形变化可由AOB得到DOE的过程 _.BAO-1-2-3-412341234-1-2-3-4yx三、解答题（共68 分，其中1722 题每题 5 分，2326 题每题 6 分，27、28 题每题 7 分）17.下面是小明设计的“已知底和底边上的高作等腰三角形”的尺规作图过程.已知：如图1，已知线段a 和线段 b.求作：等腰三角形ABC，使得 AC=BC，AB=a，CDAB于 D，CD=b.图 2BMA图1ba作法：如图 2，作射线AM，在 AM 上截取 AB=a；分别以A、B为圆心，大于12AB长为半径作弧，两弧交于E、F
22、两点；连结 EF，EF交 AB 与点 D；以点 D 为圆心，以b 为半径作弧交射线DE 于点 C.连结 AC，BC.所以，ABC为所求作三角形.根据小明设计的尺规作图过程，（1）使用直尺和圆规，补全图形（保留痕迹）；（2）完成下面的证明.QAE=BE=AF=BF，四边形 AEBF为_.QAB 与 EF交于点 D，文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6
23、M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W
24、1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:
25、CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 H
26、S6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB
27、2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编
28、码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3
29、 HS6M4H5P5V9 ZB2W1Z4N10T2EFAB，AD=_.Q点 C在 EF上，BC=AC（填写理由:_）18.计算：116cos3012()|32|2.19.解不等式组：31)12523xxxx（20.如图，菱形ABCD中，AC 与 BD 交于点 O.DE/AC，12DEAC.（1）求证:四边形 OCED是矩形；（2）连结 AE，交 OD于点 F，连结 CF.若 CF=CE=1，求 AE长.OEDCBA21.已知方程20 xmxn（1）当 n=m-2 时，求证：方程总有两个不相等的实数根.（2）若方程有两个不相等实数根，写出一组满足条件的m，n 值，并求出此时方程的根.22.为积极
30、响应“弘扬传统文化”的号召，某学校组织全校1200 名学生进行经典诗词诵读活动，并在活动之后举办经典诗词大赛，为了解本次系列活动的持续效果，学校团委在活动启动之初，随机抽取40 名学生调查“一周诗词诵背数量”，根据调查结果绘制成的统计图如图所示文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2
31、S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V
32、9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T
33、2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7
34、T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P
35、5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N1
36、0T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2大赛结束后一个月，再
37、次抽查这部分学生“一周诗词诵背数量”，绘制成统计表如下：一周诗词诵背数量3 首4 首5 首6 首7 首8 首人数1 3 5 6 10 15 请根据调查的信息分析：（1）活动启动之初学生“一周诗词诵背数量”的中位数为；（2）估计大赛后一个月该校学生一周诗词诵背6 首（含 6 首）以上的人数；（3）选择适当的统计量，至少从两个不同的角度分析两次调查的相关数据，评价该校经典诗词诵背系列活动的效果23.已知直线3ykxk与函数(0)myxx交于 A（3，2）.（1）求 k，m 值.（2）若直线3ykxk与 x 轴交于点P，与 y 轴交于点Q.点 B是 y 轴上一点，且ABQS=2POQS.求点 B的纵
38、坐标.24.如图，AB 为 O 的直径，E为 OB 中点，过 E作 AB垂线与 O 交于 C、D 两点.过点 C作O 的切线 CF与 DB 延长线交于点F.（1）求证：CFDF（2）若 CF=3，求 OF长.FOEDCBA25.如图ABC中，30BAC，AB=5cm，AC=2 3cm，D 是线段AB 上一动点，设AD长为 xcm，CD长为 ycm（当点 A 与点 D 重合时，x=0）.DCBAxOy-6-5-4-3-2-1-6-5-4-3-2-1654321654321文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4
39、H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z
40、4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH
41、7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6
42、M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W
43、1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:
44、CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 H
45、S6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2小明根据学习函数的经验，对函数y随自变量x 的变化而变化的规律进行了探究下面是小慧的探究过程，请补充完整：（1）经过取点、画图、测量，得到x 与 y 的几组对应值，如下表：x/cm 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 y/cm 3.5 _ 2.7 2.3 2.0 1.8 1.7 1.8 2.0 2.3 2.7（说明：补全表格时，结果保留一位小数）（2）在平面直
46、角坐标系xoy 中，描出补全后的表中各组数值所对应的点，并画出函数图象；Oy/cm54321x/cm7654321（3）结合函数图象解决问题，当CD2cm 时，x 的取值范围是 _.26.已知抛物线2224yxmxm，抛物线的顶点为P.（1）求点 P的纵坐标.（2）设抛物线x 轴交于 A、B两点，1122(,),(,)A xyB xy，21xx.判断 AB长是否为定值，并证明.已知点M（0，-4），且 MA5，求21-x xm的取值范围.27.已知ABC为等边三角形，点 D 是线段 AB上一点（不与 A、B重合）.将线段 CD绕点 C逆时针旋转60得到线段CE.连结 DE、BE.（1）依题意补
47、全图1 并判断 AD 与 BE的数量关系.（2）过点 A 作AFEB交 EB延长线于点F.用等式表示线段EB、DB 与 AF之间的数量关系并证明.xy-5-4-3-2-5-4-3-254325432-11-11文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB
48、2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编
49、码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3
50、 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9 ZB2W1Z4N10T2文档编码:CH7K2K7T2S3 HS6M4H5P5V9