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1、名师精编优秀教案3 电场强度学习目标1.了解静电场,初步了解场是物质存在的形式之一.2.理解电场强度的概念及定义式,会用电场强度、电场线描述电场.3.掌握点电荷的电场、电场线,理解电场强度的叠加.4.加深比值定义的理解.自主探究1.19世 纪30年 代,第 一 个 提 出 了 场 的 观 点.物 质 存 在 的 两 种 形 式为、.2.产生的电场为静电场.电场具有的性质.3.称为试探电荷或检验电荷;称为场源电荷或源电荷.4.叫做电场强度,其公式为,单位.点电荷的电场强度公式为.5.形象地描述电场的方法是.合作探究一、电场1.什么是电场?电荷间的相互作用是怎样发生的?2.什么是静电场?二、电场强
2、度1.试探电荷和场源电荷试探电荷必须具备的条件:.2.电场强度(1)定义:(比值定义).(2)公式:.名师精编优秀教案(3)单位:.(4)电场强度是,它的方向是.说明:(1)E=为定义式,适用于一切电场.(2)某点的电场强度的大小及方向取决于电场本身,与检验电荷的正负、电荷量的大小及受到的电场力无关.三、点电荷的电场、电场强度的叠加1.点电荷电场强度公式:.2.以点电荷Q为圆心的球面上各点的电场强度的特点:.当Q为正电荷时,E的方向:.当Q为负电荷时,E的方向:.3.如果场源电荷有多个点电荷,则如何求电场中某点的电场强度?.【例题】真空中两个正点电荷A、B所带电荷量皆为+Q,且相距为r,则A、
3、B之间连线上距离A为处的P点的电场强度为多少?思考:能否在P点处放入一个带负电的点电荷-q,通过求出-q在P处受合电场力,然后根据E=求出P处的电场强度大小和方向?拓展:如果带电体是半径为R的均匀球体(或球壳),它外部空间某点的电场强度该怎样计算?四、电场线1.电场线:如果在电场中画出一些曲线,使曲线上每一点的,这样的曲线就叫做电场线(如图所示)文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编
4、码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G1
5、0 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1
6、 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文
7、档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3
8、G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2
9、N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S
10、1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1名师精编优秀教案2.特点(1).(2).(3).3.画出几种特殊的电场线五、匀强电场电场中各点电场强度的、方向的电场就叫匀强电场.课堂检测1.电场中有一点P,下列说法中正确的有()A.若放在P点的电荷的电荷量减半,则P点的电场强度减半B.若P点没有检验电荷,则P点电场强度为零C.P点的电场强度越大,则同一电荷在P点受到的电场力越大D.P点的电场强度方向为放在该点的电荷的受力方向2.在一个电场中a、b、c、d四点分别引入检验电荷时,测得的检验电荷所受电场力跟其电荷量的函数关系图象,如图所示.下列叙述正确的是()A
11、.这个电场是匀强电场B.四点电场强度大小关系是EdEaEbEcC.四点电场强度大小关系是EaEbEdEcD.无法确定四个点的电场强度大小关系3.如图所示,A、B为两个等量的正点电荷,在其连线中垂线上的P点放一个负点电荷q(不计重力),由静止释放后,下列说法中正确的是()文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文
12、档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3
13、G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2
14、N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S
15、1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6
16、X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7
17、E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y
18、3S1名师精编优秀教案A.点电荷在从P点到O点运动的过程中,加速度越来越大,速度越来越大B.点电荷在从P点到O点运动的过程中,加速度越来越小,速度越来越大C.点电荷运动到O点时加速度为零,速度达最大值D.点电荷越过O点后,速度越来越小,加速度越来越大,直到粒子速度为零4.关于电场线,下列说法正确的是()A.电场线是客观存在的B.电场线与电荷运动的轨迹是一致的C.电场线上某点的切线方向与电荷在该点的受力方向可以不相同D.沿电场线方向,电场强度一定越来越大5.如图所示,四个电场线图,一正电荷在电场中由P到Q做加速运动且加速度越来越大,那么它所在的电场是()6.如图所示,A、B、C、D、E是半径为r
19、的圆周上等间距的五个点,在这些点上各固定一个点电荷,除A点处的电荷量为-q外,其余各点处的电荷量均为+q,则圆心O处()A.电场强度大小为,方向沿OA方向B.电场强度大小为,方向沿AO方向C.电场强度大小为,方向沿OA方向D.电场强度大小为,方向沿AO方向7.如图所示,一带电粒子只受电场力从A飞到B,径迹如图中虚线所示,下列说法正确的文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V
20、7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z
21、5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7
22、G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD
23、9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM
24、4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1
25、A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:
26、CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1名师精编优秀教案是()A.粒子带负电B.粒子加速度不断变小C.粒子在A点时动能较大D.B点电场强度大于A点电场强度8.如图所示,有一水平方向的匀强电场,电场强度为9103N/C,在电场内的竖直平面内作半径为1 m 的圆,圆心处放置电荷量为110-6 C 的正点电荷.则圆周上C点处的电场强度大小为.9.如图所示,把一个倾角为 的绝缘斜面固定在匀强电场中,电场方向水平向右,电场强度大小为E.有一质量为m、带电量为+q的物体以初速度v0,从A端滑上斜面恰好能沿斜面匀速运动,求物体与斜面间的动摩擦因数.文档编码:CD9V7W6X3
27、G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2
28、N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S
29、1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6
30、X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7
31、E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y
32、3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1文档编码:CD9V7W6X3G10 HM4Z5P7E2N1 ZR1A7G9Y3S1