为了方便电教室使用考试系统，防止学员打开IE和使用U盘查看答案，运行后锁定IE浏览器主页，并如检查到U盘立即卸载！-In order to facilitate classroom use test systems to prevent students open IE and use U disk to see the answer, lock IE browser home run, and checked as to U disk immediately unload!