2022年南京市秦淮区中考一模数学试卷及答案2 .pdf

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1、2013 年中考数学模拟试题（一）数学注意事项：全卷满分120 分考试时间为120 分钟考生答题全部答在答题卡上，答在本试卷上无效一、选择题（本大题共6 小题，每小题2 分，共 12 分在每小题所给出的四个选项中，恰有一项是符合题目要求的，请将正确选项前的字母代号填在答卷纸相应位置上）1下列四个式子中，字母a 的取值可以是一切实数的是A1aBa0 Ca2Da2计算(a2)3的结果是Aa5B a5Ca6D a63面积为0.8 m2的正方形地砖，它的边长介于A90 cm 与 100cm 之间B80 cm 与 90cm 之间C70cm 与 80 cm 之间D60 cm 与 70 cm 之间4从下列不

2、等式中选择一个与x12 组成不等式组，若要使该不等式组的解集为x1，则可以选择的不等式是Ax 0 Bx2 Cx 0 Dx25已知正五边形的对称轴是过任意一个顶点与该顶点对边中点的直线如图所示的正五边形中相邻两条对称轴所夹锐角的度数为A75B72C70D606“一般的，如果二次函数yax2bxc 的图象与x 轴有两个公共点，那么一元二次方程ax2bxc0 有两个不相等的实数根苏科版数学九年级（下册）P21”参考上述教材中的话，判断方程x22x1x2 实数根的情况是A有三个实数根B有两个实数根C有一个实数根D无实数根（第 5 题）二、填空题（本大题共10 小题，每小题2 分，共 20 分不需写出解

3、答过程，请把答案直接填写在答卷纸相应位置上）7使x1有意义的x 的取值范围是8分解因式a3a9有六个面，且主视图、俯视图和左视图都相同的几何体是10月球是距离地球最近的天体，它与地球的平均距离约为384401 千米 将数 384401 用科学记数法表示为11若代数式x2 4xb 可化为(xa)21，则 ab 的值是12一次外语口语考试中，某题（满分为4 分）的得分情况如下表：得分分0 1 2 3 4 人数人15 10 25 40 10 则该题的平均得分是分13如图，在ABC 中，ADDBBC若 Cn，则 ABC （用含 n 的代数式表示）14如图，在等腰直角三角形ABC 中，ABBC2 cm，

4、以直角顶点B 为圆心，AB 长为半径画弧，再以 AC 为直径画弧，两弧之间形成阴影部分阴影部分面积为cm215如图，在一个圆形铁板中，冲出同样大小的四个小圆，大圆与小圆相内切，小圆与小圆相外切若小圆半径是1cm，则大圆的半径是cm16如图，在正方形纸片ABCD 中，E 为 BC 的中点将纸片折叠，使点A 与点 E 重合，点D 落在点 D处，MN 为折痕若梯形ADMN 的面积为S1，梯形 BCMN 的面积为S2，则S1S2的值为A EDDCBNM（第 16 题）（第 15 题）D C B A（第 13 题）A C B（第 14 题）文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9

5、H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1

6、H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9

7、H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1

8、H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9

9、H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1

10、H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9

11、H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6三、解答题（本大题共11 小题，共 88 分请在答题卡指定区域内作答，解答时应写出文字说明、证明过程或演算步骤）17（6 分）计算|2 12818（8 分）化简代数式1x1xx21x22x，并求出当x 为何值时，该代数式的值为219（8 分）已知 ABC 是等边三角形，点D、F 分别在边BC、AC 上，且 DF AB，过点 A平行于 BC 的直线与DF 的延长线交于点E，连结 CE、BF（1）求证：ABF ACE；（2）

12、若 D 是 BC 的中点，判断DCE 的形状，并说明理由20（8 分）为了解某校九年级学生体育测试成绩情况，现从中随机抽取部分学生的体育成绩统计如下，其中右侧扇形统计图中的圆心角为 36体育成绩（分）人数（人）百分比（）36 8 16 37 24 38 15 39 m 40 根据上面提供的信息，回答下列问题：（1）m；抽取部分学生体育成绩的中位数为分；（2）已知该校九年级共有500 名学生，如果体育成绩达38 分以上（含38 分）为优秀，请估计该校九年级学生体育成绩达到优秀的总人数F E D C B A（第 19 题）九年级学生体育成绩统计表九年级学生体育成绩扇形统计图40 分36 分37 分

13、38 分39 分（第 20 题）文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码

14、:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1

15、C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码

16、:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1

17、C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码

18、:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1

19、C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6C D BB A E（第 21 题）21（8 分）如图，一台起重机，他的机身高AC 为 21m，吊杆 AB 长为 36m，吊杆与水平线的夹角 BAD 可从 30 升到 80 求这台起重机工作时，吊杆端点B 离地面 CE 的最大高度和离机身AC 的最大水平距离（结果精确到0.1m）（参考数据：sin80 0.98，cos80 0

20、.17，tan80 5.67，31.73）22（8 分）（1）求二次函数yx24x1 图象的顶点坐标，并指出当x 在何范围内取值时，y 随 x 的增大而减小；（2）若二次函数y x2 4xc 的图象与坐标轴有 2 个交点，求字母c 应满足的条件23（8 分）在一个不透明的盒子中，有三张除颜色外都相同的卡片，一张两面都是红色，一张两面都是黑色，另一张一面是红色，一面是黑色（1）从盒中任意抽出一张卡片，求至少有一面是红色的概率；（2）小明和小颖玩抽卡片的游戏，规则如下：从盒中任意抽出一张卡片，放在桌子上，一面朝上，猜另一面的颜色 如果另一面的颜色与朝上一面的颜色相同，则小颖胜，反之，则小明胜游戏共

21、玩了5 次，其中小明胜2 次因此，小明认为：在这个游戏中，自己获胜的概率一定是25，小颖获胜的概率一定是35而小颖则认为：假设抽出的卡片朝上一面是红色，则这张一定不可能是两面黑色的卡片，它或者是两面红，或者是两面不同，相同与不同机会各占一半，所以自己和小明获胜的概率都是12请分别评述小明与小颖的观点是否正确，并判断这个游戏公平吗？简要说明理由文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9

22、H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3

23、 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9

24、H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3

25、 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9

26、H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3

27、 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M624（8 分）随

28、着青奥会的临近，青奥特许商品销售逐渐火爆甲、乙两家青奥商品专卖店一月份销售额分别为10 万元和 15 万元，三月份销售额甲店比乙店多10 万元已知甲店二、三月份销售额的月平均增长率是乙店二、三月份月平均增长率的2 倍，求甲店、乙店这两个月的月平均增长率各是多少？25（9分）甲乙两地相距400km，一辆轿车从甲地出发，以 80 km/h 的速度匀速驶往乙地 0.5h后，一辆货车从乙地出发匀速驶往甲地货车出发2.5h 后与轿车在途中相遇此后，两车继续行驶，并各自到达目的地设轿车行驶的时间为x（h），两车距乙地的距离为y（km）（1）两车距乙地的距离与x 之间的函数关系，在同一坐标系中画出的图象是（

29、）（2）求货车距乙地的距离y1与 x 之间的函数关系式（3）在甲乙两地间，距乙地300km 处有一个加油站，两车在行驶过程中都曾在该加油站加油（加油时间忽略不计）求两车加油的间隔时间是多少？400 O y x A D B C 400 O y x A D B C 400 O y x A D B C 400 O y x A D B C ABCD（第 25 题）文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文

30、档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A

31、8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文

32、档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A

33、8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文

34、档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A

35、8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6A

36、 B O C F E（第 26 题）26（8 分）如图，在ABO 中，OAOB，C 是边 AB 的中点，以O 为圆心的圆过点C，且与 OA 交于点 E、与 OB 交于点 F，连接 CE、CF（1）AB 与 O 相切吗，为什么？（2）若 AOB ECF，试判断四边形OECF 的形状，并说明理由27（9 分）小明在玩一副三角板时发现：含45 角的直角三角板的斜边可与含30 角的直角三角板的较长直角边完全重合（如图）即 C DA的顶点 A、C 分别与 BAC 的顶点 A、C 重合现在，他让 C DA 固定不动，将BAC 通过变换使斜边BC经过 C DA 的直角顶点D（1）如图，将BAC 绕点 C 按

37、顺时针方向旋转角度（0 180），使 BC 边经过点 D，则 （2）如图，将BAC 绕点 A 按逆时针方向旋转，使BC 边经过点D试说明：BCA C（3）如图，若AB2，将将 BAC 沿射线 A C 方向平移m 个单位长度，使BC 边经过点 D，求 m 的值A（A）C（C）D B 图ACB D D B AA D B C（C）A（A）ACCC图图图（第 27 题）文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5

38、M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 H

39、R1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5

40、M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 H

41、R1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5

42、M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 H

43、R1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5

44、M620122013 学年度第二学期初三模拟测试（一）数学试题参考答案及评分标准说明：本评分标准每题给出了一种或几种解法供参考，如果考生的解法与本解答不同，参照本评分标准的精神给分一、选择题（每小题2 分，共 12 分）二、填空题（每小题2 分，共 20 分）7x1 8a(a1)(a 1)9正方体（立方体）103.8440110511 1 12 2.2 1318032n142 1521 1635三、解答题（本大题共11 小题，共88 分）17解：|2 1282 2 2 2 2 122 6 分18解：1x1xx21x22x1x 1x?x(x 2)(x1)(x1)1x1 4分令1x1=2，则 x1

45、12，x327 分经检验，x32代入原式成立所以x32时，该代数式的值为2 8 分19（1）证明：ABC 是等边三角形，ABAC，BAC ACB60DEAB，AEBD，EFA BAC60，CAE ACB60 EAF 是等边三角形AFAE在 ABF 和 ACE 中，AB AC，BAF CAE60，AFAE，ABF ACE4 分（2）DCE 是直角三角形，DCE90 理由：连接AD DE AB，AEBD，四边形ABDE 是平行四边形AEBD D 是 BC 中点，BDDCAEDC AEDC，四边形ADCE 是平行四边形ABAC，D 是 BC 中点，AD DC四边形ADCE 是矩形 DCE 是直角三角

46、形，DCE90 8 分题号1 2 3 4 5 6 答案C D B A B C F E D C B A（第 19 题）文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档

47、编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8

48、P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档

49、编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8

50、P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档编码:CB9H4P1H6R5 HR1A8P1C8J3 ZL9H3D1P5M6文档