xxxxxxxxxx<html><meta charset="utf-8"><title>编程狮(w3cschool.cn)</title><style>.wrap{ line-height: 200px;/*垂直居中关键*/ text-align:center; height: 200px; font-size: 36px; background-color: #ccc;}</style><body> <div class="wrap"> 这是一个段落 </div></body></html>