<!DOCTYPE html>
<html lang="en">
<head>
<!--字体设置-->
<meta charset="utf-8">
<!--不支持IE的兼容模式，在IE浏览器中运行最新的渲染模式-->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!--初始化移动浏览显示，控制视口（viewport）的大小（width）和缩放值（initial-scale）-->
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags
以上三个标签必须放在head标签部分的最靠前部分，其他任何head内容必须在它们之后 -->
<title>Bootstrap 101 Template</title>
<!-- 在head标签里引入css文件 -->
<!-- 引入Bootstrap核心样式文件 -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!-- 浏览器版本若低于IE9，则引入html5和媒体查询 -->
<!--[if lt IE 9]>
<script class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
<script class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<h1>Hello, world!</h1>
<!-- 在body标签内容最后引入JS文件 -->
<!-- 引入jquery和Bootstrap核心js文件，Bootstrap基于Jquery，Jquery必须在前面 -->
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="js/bootstrap.min.js"></script>
</body>
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