实例如下所示。&lt。&lt。DOCTYPE html PUBLIC &quot；-//W3C//DTD XHTML 1.0 Transitional//EN&quot；&quot；http：//www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd&quot；&gt；&lt；html xmlns=&quot；http：//www.w3.org/1999/xhtml&quot；&gt；&lt；head&gt；&lt；meta http-equiv=&quot；Content-Type&quot；content=&quot；text/html；charset=utf-8&quot；/&gt；&lt；title&gt；&lt。