<div class="wrap">
    <div class="logo">
        <div class="logo_left">
         <img src="../素材/images/logo.jpg" alt="慕课网"/>
        </div>
        <div class="logo_right">
         <img src="../素材/images/tel.jpg" alt="服务热线"/>24小时服务热线：123-456-7890
        </div>
    </div><!--logo结束-->
</div><!--wrap结束-->

.wrap{width:1000px; margin:0 auto;}
.logo{height:80px; background-color:#FFF;}
.logo_left{width:200px; float:left；}
.logo_right{width:300px; float:right;}