《2021年湖南省长沙市高二数学暑假作业28几何证明选讲、坐标系与参数方程、不等式选讲(1)理湘教版.pdf》由会员分享，可在线阅读，更多相关《2021年湖南省长沙市高二数学暑假作业28几何证明选讲、坐标系与参数方程、不等式选讲(1)理湘教版.pdf（5页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、1/5 作业 28 几何证明选讲、坐标系与参数方程、不等式选讲（1）参考时量：60 分钟完成时间：月日一.选择题:1、在极坐标系中,圆的垂直于极轴的两条切线方程分别为（）A BC D2、极坐标方程表示的曲线为（）A一条射线和一个圆 B两条直线C一条直线和一个圆 D一个圆3、如 图，四 边 形ABCD 是 圆O 的 内 接 四 边 形，延 长AB 和DC 相 交 于 点 P，若,则的值为()A BC D4、如图，AD，AE，BC分别与圆O切于点 D，E，F，延长 AF与圆 O交于另一点G。给出下列三个结论：AD+AE=AB+BC+CA；AF AG=AD AE AFB ADG 其中正确结论的序号是
2、ABCD5、设曲 线的 参 数 方 程 为（为 参 数），直 线的 方 程 为，则曲线上到直线距离为的点的个数为（）A、1 B、2 C、3 D、4|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 5 页2/5 6、在直角坐标系中,椭圆的参 数方程为.在极坐标系(与直角坐标系取相同的长度单位,且以原点为极点,以轴正半轴为极轴)中,直线与圆的极坐标方程分别为与.若直线经过椭圆的焦点,且与圆相切,则椭圆的离心率为()A B C D二.填空题:7、如图,ABC为圆的内接三角形,BD为圆的弦,且BD/AC.过点A做圆的切线与DB的延长线交于点E,
3、AD与BC交于点F.若AB=AC,AE=6,BD=5,则线段CF的长为 _.8、在极坐标系（，）（0 2）中，曲线=与的交点的极坐标为_ _9、已知都是正数，则的最小值为10、若函数的最小值为3，则实数的值为三.解答题:11、如图,直线AB 为圆的切线,切点为B,点 C 在圆上,ABC 的角平分线BE 交圆于点E,DB垂直 BE交圆于 D.()证明:DB=DC；()设圆的半径为1,BC=,延长 CE交 AB于点 F,求BCF外接圆的半径.|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 5 页文档编码:CC2J4U3Z1T3 HJ5C4
4、A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档
5、编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4
6、A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档
7、编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4
8、A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档
9、编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4
10、A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S43/5 12、已知曲线的参数方程是,以坐标原点为极点,轴的正半轴为极轴建立坐标系,曲线的坐标系方程是,正方形的顶点都在上,且依逆时针次序排列,点的极坐标为()求点的直角坐标；()设为上任意一点,求的取值范围.13、已知 函数=,=.()当=-2 时,求不等式-1,且当,)时,求的取值范围.|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 5 页
11、文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5
12、C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4
13、文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5
14、C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4
15、文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5
16、C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4
17、文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S44/5 作业 28 几何证明选讲、坐标系与参数方程、不等式选讲（1）参考答案1 6 BCDABC 7、8、9、10、或 8 11、()连结 DE,交 BC与点 G.由弦切角定理得,ABF=BCE,ABE=CBE,CBE=BCE,BE=CE,又DB BE,DE 是直径,DCE=,由勾股定理可得DB=DC.()由()知,CDE=BDE,BD=DC,故DG是 BC
18、的中垂线,BG=.设 DE中点为 O,连结 BO,则BOG=,ABE=BCE=CBE=,CF BF,RtBCF的外接圆半径等于.12、()点的极坐标为点的直角坐标为()设;则13、当=-2 时,不等式化为,设函数=,=,|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页，共 5 页文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z
19、1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C
20、1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z
21、1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C
22、1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z
23、1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C
24、1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S45/5 其图像如图所示从图
25、像可知,当且仅当时,0,原不等式解集是.()当,)时,=,不等式化为,对,)都成立,故,即,的取值范围为(-1,.|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 5 页，共 5 页文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1
26、P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:C
27、C2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1
28、P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:C
29、C2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1
30、P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4文档编码:CC2J4U3Z1T3 HJ5C4A6G1P6 ZI9C1Z4K4S4