A. <Link Src="http://hovertree.com/texiao/html5/19/css/style.css" type=text/css rel=stylesheet>
B. <Include href="http://hovertree.com/texiao/html5/19/css/style.css" type=text/css rel=stylesheet>
C. <Link href="http://hovertree.com/texiao/html5/19/css/style.css" type=text/css>
D. <Link href="http://hovertree.com/texiao/html5/19/css/style.css" type=text/css rel=stylesheet>
更多：http://hovertree.com/tiku/
http://www.cnblogs.com/roucheng/p/texiao.html