求大神解惑

Question

照着老师做的 咋回事啊

<div class="nav">

<div class="nav_left"></div>

<div class="nav_mid">

<div class="nav_mid_left">

<ul>

<li><a href="#">首页</a></li>

<li><a href="list.html">关于慕课</a></li>

<li><a href="list.html">新闻动态</a></li>

<li><a href="list.html">在线课程</a></li>

<li><a href="list.html">人才招聘</a></li>

</ul>

</div>

<div class="nav_mid_right">

<form action="" method="post">

<input type="text"/>

</form>

</div>

</div><!-- nav_mid结束 -->

<div class="nav_right"></div>

</div><!-- nav结束 -->

Answer 1

遇到什么问题了？