這是XML文件，下面是css文件<?xml version="1.0" encoding="GB2312" ?><?xml-stylesheet type="text/css" href="book.css" ?><summer>? ?<management> <hello>一分鐘</hello> <study>一小時</study>? ?</management>? </summer><?xml version="1.0" encoding="GB2312" ?>study {display:block; color:blue}hello {display:block; font-style:italic}