A.<!--xml 示例--> <?xml version="1.0" encoding="gb2312"> <?xml stylesssheet type="text/css" heft="myess.css" ?> <mytag>hello world!</mytag>
B.<?XML version="1.0" encoding="gb2312"> <?XML stylesssheet type="text/css" herf="mycss.css" ?> <!--xml示例--> <mytag>hello world! </mytag>
C.<?XML encoding="gb2312" version="1.0"> <?xml stylesssheet type="text/css" heft="mycss.css" ?> <!--xml示例--> <xmltag>hello world!</xmltag>
D.<!--xml示例--> <?xml version="1.0" encoding="gb2312"> <?xml stylesssheet type="text/ess" heft="mycss.css" ?> <xmltag> hello world! </xmltag>