ArcGis允许用户在线创建、浏览、使用和分享智能地图信息，电脑安装arcgis10.2却出现报错，报错内容如下：arcgis10.2 fro desktop requires mircosoft .net framework 3.5 spq or equivalent,please see the installation guide for more information. to download and install mirosoft .net framework 3.5 sp1怎么回事？很明显