请老师帮我检查一下有没有多余的不需要的代码

来源：2-4 编程练习

一条见过世面的鱼

2019-06-30 11:55:51

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
    /*此处写代码*/
    *{
        margin:0;
        padding:0;
    }
    ul li{
        list-style: none;
    }
    .nav{
        background:black;
        width:1100px;
        height:100px;
        position: absolute;
        top: 50%;
        left: 50%;
        margin-top: -50px;
        margin-left: -550px;
    }
    .logo{
        float: left;
    }
    .nav1{
        float: right;
        color: #fff;
        line-height: 100px;
        font-size: 18px;
        font-family: "微软雅黑";
    }
    .nav1 ul li{
        float: left;
        padding:0 10px;
        margin: 0 10px;
    }
</style>
</head>
<body>

<div class="nav">
      <div class="logo"><img src="http://climg.mukewang.com/58c0d2d900016ce303000100.png"/></div>
      <div class="nav1">
          <ul>
              <li>课程</li>
              <li>课业路径</li>
              <li>实战</li>
              <li>猿问</li>
              <li>手记</li>
          </ul>
      </div>
</div>
</body>
</html>