2018年广东省中山市教育联合体中考数学一模试卷.pdf

第1页共 19页2018 年广东省中山市教育联合体中考数学一模试卷一、选择题每题3 分，总分值 30 分1 3 分 5 的相反数是A5 B5 C D2 3 分据 2017 年 1 月 24 日中山日报报道，三乡镇2016 年财政收入突破 180 亿元，在中山各乡镇中排名第二将180 亿用科学记数法表示为10810910103 3 分以下运算正确的选项是A B m23=m5Ca2?a3=a5 D x+y2=x2+y24 3 分已知正 n 边形的一个内角为135，则边数 n 的值是A6 B7 C 8 D105 3 分以下图中是中心对称图形而不是轴对称图形的共有A1 个 B 2 个 C 3 个 D4 个6 3 分在中山市举行“慈善万人行”大型募捐活动中，某班50 位同学捐款金额统计如下：金额元20303550100学生数人20105105则在这次活动中，该班同学捐款金额的众数和中位数分别是A20 元，30 元B20 元，35 元C100 元，35 元D100 元，30 元73 分 小明想用一个圆心角为120，半径为 6cm的扇形做一个圆锥的侧面 接缝处忽略不计，则做成的圆锥底面半径为A1 cm B2 cmC 3 cm D4cm8 3 分如图，P 是反比例函数图象上第二象限内一点，假设矩形PEOF的面积为 3，则反比例函数的解析式是第2页共 19页Ay=By=Cy=Dy=9 3 分如图，已知 O 为四边形 ABCD的外接圆，O为圆心，假设 BCD=120 ，AB=AD=2，则 O 的半径长为ABCD10 3 分如图，在 RtAOB中，AOB=90 ，OA=3，OB=2，将 RtAOB绕点O顺时针旋转 90 后得 RtFOE，将线段 EF绕点 E逆时针旋转 90 后得线段 ED，分别以 O，E为圆心，OA、ED长为半径画弧 AF和弧 DF，连接 AD，则图中阴影部分面积是A8B C 3+D二、填空题本大题共有6 小题，每题 4 分，共 24 分11 4 分分解因式：xy24x=12 4 分已知式子有意义，则 x的取值范围是文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3第3页共 19页13 4 分不等式组的解集是14 4 分如图是二次函数和一次函数 y2=kx+t 的图象，当 y1y2时，x 的取值范围是15 4 分假设 x=3，则代数式 x26x+9 的值为16 4 分正方形 A1B1C1O，A2B2C2C1，A3B3C3C2 按如下图放置，点 A1、A2、A3在直线 y=x+1 上，点 C1、C2、C3 在 x 轴上，则 A5的坐标是三解答题一本大题 3 小题，每题 6 分，共 18 分17 6 分计算：|2|+21cos60 1018 6 分先化简，再求值：先化简x+1，然后从 2x的范围内选取一个合适的整数作为x 的值代入求值19 6 分某种植物的主干长出假设干数目的支干，每个支干又长出同样数目的小分支，主干、支干和小分支的总数是91，每个支干长出多少小分支？四解答题二本大题 3 小题，每题 7 分，共 21 分20 7 分如图，ABC中，ACB ABC 1用直尺和圆规在 ACB 的内部作射线CM，使 ACM=ABC 不要求写作法，保留作图痕迹；2假设 1中的射线 CM 交 AB于点 D，AB=9，AC=6，求 AD 的长文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3第4页共 19页21 7 分纪中三鑫双语学校准备开展“阳光体育活动”，决定开设足球、篮球、乒乓球、羽毛球、排球等球类活动，为了了解学生对这五项活动的喜爱情况，随机调查了 m 名学生每名学生必选且只能选择这五项活动中的一种根据以上统计图提供的信息，请解答以下问题：1m=，n=2补全上图中的条形统计图3在抽查的 m 名学生中，有小薇、小燕、小红、小梅等10 名学生喜欢羽毛球活动，学校打算从小薇、小燕、小红、小梅这4 名女生中，选取 2 名参加全市中学生女子羽毛球比赛，请用列表法或画树状图法，求同时选中小红、小燕的概率 解答过程中，可将小薇、小燕、小红、小梅分别用字母A、B、C、D 代表22 7 分如图，BD是ABC的角平分线，点E，F 分别在 BC，AB 上，且 DEAB，BE=AF 1求证：四边形 ADEF是平行四边形；2假设 ABC=60 ，BD=4，求平行四边形 ADEF的面积文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3第5页共 19页五解答题三此题共 3 个小题，每题 9 分，共 27 分23 9 分如图，抛物线 y=+bx+c 过点 A3，0，B0，2 Mm，0为线段 OA上一个动点点 M 与点 A 不重合，过点 M 作垂直于 x 轴的直线与直线 AB和抛物线分别交于点P、N1求直线 AB的解析式和抛物线的解析式；2如果点 P是 MN 的中点，那么求此时点N 的坐标；3在对称轴的左侧是否存在点M 使四边形 OMPB的面积最大，如果存在求点M 的坐标；不存在请说明理由24 9 分如图 1，O的直径 AB=12，P是弦 BC上一动点与点 B，C不重合，ABC=30 ，过点 P作 PDOP交O 于点 D1如图 2，当 PDAB时，求 PD的长；文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3第6页共 19页2如图 3，当=时，延长 AB至点 E，使 BE=AB，连接 DE求证：DE是O的切线；求 PC的长25 9 分在正方形 ABCD中，AB=8，点 P 在边 CD上，tanPBC=，点 Q 是在射线 BP上的一个动点，过点Q 作 AB的平行线交射线AD 于点 M，点 R在射线 AD上，使 RQ始终与直线 BP垂直1如图 1，当点 R与点 D 重合时，求 PQ的长；2如图 2，试探索：的比值是否随点 Q 的运动而发生变化？假设有变化，请说明你的理由；假设没有变化，请求出它的比值；3如图 3，假设点 Q在线段 BP上，设 PQ=x，RM=y，求 y 关于 x 的函数关系式，并写出它的定义域文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3第7页共 19页2018 年广东省中山市教育联合体中考数学一模试卷参考答案与试题解析一、选择题每题3 分，总分值 30 分1【解答】解：5的相反数是 5故选：B2【解答】1010，故选：D3【解答】解：A、=3，本选项错误；B、m23=m6，本选项错误；C、a2?a3=a5，本选项正确；D、x+y2=x2+y2+2xy，本选项错误，故选：C4【解答】解：正 n 边形的一个内角为135，正 n 边形的一个外角为180 135=45，n=360 45=8故选：C5【解答】解：第一个图形，既是中心对称图形，又是轴对称图形，故错误；第二个图形，是轴对称图形，不是中心对称图形，故错误；文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 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ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG2X3M7V7I3文档编码:CC7C2T10C4R8 HZ10T7A8D10T3 ZG