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1、安徽省合肥市2019年中考数学模拟试卷（含答案）一选择题（满分40 分，每小题4 分）1二次函数yx2+2x+3 的图象的开口方向为（）A向上B向下C向左D向右2如图，在ABC中，A90若AB12，AC5，则 cosC的值为（）ABCD3如图，在ABC中，ACB90，CD是AB边上的高如果BD4，CD6，那么BC：AC是（）A 3：2 B 2：3 CD4下列四个立体图形中，其主视图是轴对称图形但不是中心对称图形的是（）ABCD5若点A（x1，2）、B（x2，5）都在反比例函数y的图象上，则一定正确的是（）Ax1x2 0 Bx1 0 x2Cx2x10 Dx20 x16如图，四边形ABCD内接于O
2、，若A：C5：7，则C（）|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 18 页A 210B 150C105D757如图，AB是O的直径，CD是O的弦 若BAD24，则C的度数为（）A 24B 56C66D768如图，隧道的截面由抛物线和长方形OABC构成，长方形的长OA是 12m，宽OC是 4m按照图中所示的平面直角坐标系，抛物线可以用yx2+bx+c表示在抛物线型拱璧上需要安装两排灯，使它们离地面的高度相等，如果灯离地面的高度不超过8m那么两排灯的水平距离最小是（）A 2mB 4mC4mD4m9如图，正方形ABCD的边长为2，点
3、P和点Q分别从点B和点C出发，沿射线BC向右运动，且速度相同，过点Q作QHBD，垂足为H，连接PH，设点P运动 的距离为x（0 x2），BPH的面积为S，则能反映S与x之间的函数关系的图象大致为（）|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 18 页文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8
4、HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K
5、6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10
6、 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7
7、W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O
8、6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:
9、CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T
10、5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6ABCD10如图，在RtABC中，C90，ADBD，CE2BE过B作BFCD交AE的延长线为F当BF1 时，AB的长为（）A 4 B 5 C6 D7 二填空题（满分20 分，每小题5 分）11已知二次函数yx22mx（m为常数），当 1x2 时，函数值y的最小值为 2，则m的值是12一个不透明布袋里共有5 个球（只有颜色不同），其中 3 个是黑球，2 个是白球，从中随机摸出一个球，记下颜色后放回、搅匀，再随机摸出一个球，则两次摸出的球是一黑一白的概率
11、是13已知点P在反比例函数y图象的第二象限上，PMx轴，PNy轴，M、N为垂足，矩形PMON的面积为2，则k14如图，O是ABC的外接圆，BAC60，ODBC于点D，若BC2，则劣弧BC的长为（结果保留）|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 18 页文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1
12、P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7
13、G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5
14、I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR
15、5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10
16、S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档
17、编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7
18、B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6三解答题（满分16 分，每小题8 分）15（8 分）计算：（2）0+|1|+2cos30 16（8 分）如图1 是一种折叠台灯，将其放置在水平桌面上，图2 是其简化示意图测得其灯臂AB长为 28cm，灯罩BC长为 15cm，底座AD厚度为 3cm，根据使用习惯，灯臂AB的倾斜角DAB固定为 60（1）当BC转动到与桌面平行时，求点C到桌面的距离；（2）在使用过程中发现，当BC转到至ABC 145时，光线效果最好，求此时灯罩顶端C到桌面的高度（参
19、考数据：1.7，sin25 0.4，cos25 0.9，tan25 0.5，结果精确到个位）四解答题（满分16 分，每小题8 分）17（8 分）如图所示，在边长为1 个单位长度的小正方形组成的网格中，ABC的顶点A，B，C在格点（网格线的交点）上（1）将ABC绕点B逆时针旋转90，得到A1BC1，画出A1BC1；（2）以点A为位似中心放大ABC，得到AB2C2，使放大前后的三角形面积之比为1：4，请你在网格内画出AB2C218（8 分）如图，甲分为三等分数字转盘，乙为四等分数字转盘，自由转动转盘（1）转动甲转盘，指针指向的数字小于3 的概率是；（2）同时自由转动两个转盘，用列举的方法求两个转盘
20、指针指向的数字均为奇数的概率|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页，共 18 页文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 H
21、D7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6
22、K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10
23、ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W
24、10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6
25、文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:C
26、F7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6五解答题（满分20 分，
27、每小题10 分）19（10 分）如图，在AOB中，ABO90，OB 4，AB 8，反比例函数y在第一象限内的图象分别交OA，AB于点C和点D，且BOD的面积SBOD4（1）求反比例函数解析式；（2）求点C的坐标20（10 分）如图，已知O的直径AB 10，弦AC 6，BAC的平分线交O于点D，过点D作DEAC交AC的延长线于点E（1）求证：DE是O的切线；（2）求DE的长六解答题21（12 分）某种小商品的成本价为10 元/kg，市场调查发现，该产品每天的销售量w（kg）与销售价x（元/kg）有如下关系w 2x+100，设这种产品每天的销售利润为y（元）（1）求y与x之间的函数关系式；（2）当
28、售价定为多少元时，每天的销售利润最大？最大利润是多少？七解答题|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 5 页，共 18 页文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文
29、档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF
30、7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K
31、1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD
32、7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K
33、5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 Z
34、R5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W1
35、0S2O622（12 分）在平面直角坐标系xOy中，若抛物线yx2+bx+c顶点A的横坐标是1，且与y轴交于点B（0，1），点P为抛物线上一点（1）求抛物线的表达式；（2）若将抛物线yx2+bx+c向下平移4 个单位，点P平移后的对应点为Q如果OPOQ，求点Q的坐标八解答题23（14 分）在ABC中，ABC 120，线段AC绕点C顺时针旋转60得到线段CD，连接BD（1）如图 1，若ABBC，求证：BD平分ABC；（2）如图 2，若AB2BC，求的值；连接AD，当SABC时，直接写出四边形ABCD的面积为|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载
36、.第 6 页，共 18 页文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7
37、W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O
38、6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:
39、CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T
40、5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8
41、HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K
42、6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6参考答案一选择题1解：二次函数yx2+2x+3 中a10，二次函数yx2+2x+3 的图象的开口向上，故选：A2解：根据勾股定理得，BC 13
43、，所以，cosC故选：A3解：ACB 90，CD是AB边上的高，ADCCDBACB90，A+B90，A+ACD90，ACDB，ACDCBD，故选：B4解：A、是轴对称图形，也是中心对称图形故错误；B、是轴对称图形，也是中心对称图形故错误；C、是轴对称图形，不是中心对称图形故正确；D、是轴对称图形，也是中心对称图形故错误故选：C5解：根据反比例函数图象性质，k 40，函数在二、四象限，函数y随x的增大而增大，即y越大，x越大，所以x1x2，由于函数在二、四象限，而A、B两点y值都大于0，所以A、B两点在第二象限，所以x1、x2都小于 0，故选：A6解：A+C180，A：C5：7，|精.|品.|可
44、.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 7 页，共 18 页文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2
45、O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码
46、:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4
47、T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8
48、 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2
49、K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I1
50、0 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6文档编码:CF7B4T5K1P8 HD7G2K6K5I10 ZR5A7W10S2O6C180105故选：C7解：AB是O的直径，ADB90，B90BAD