4、在以下这段代码中，页面运行后出现的语句是( )。 [%@ pagecontentType="text/html;charset=gb2312"%] [html] [body] [% application.setAttribute("Msg","WelcomeApplication!"); page.setAttribute("Msg","Welcomepage!"); session.setAttribute("Msg","WelcomeSession!"); %] ${Msg}[br][/br] [/]