我正在通过查看示例从这个链接练习引导程序。我试图获得与给出的示例相同的输出,但我只得到简单的行。这是一段代码
<!DOCTYPE html>
<html>
<head>
<title>Prices for todo app</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- Bootstrap -->
<link href="bootstrap-3.0.0/dist/css/bootstrap.min.css" rel="stylesheet" media="screen">
<link href="bootstrap-3.0.0/dist/css/custom.css" rel="stylesheet" media="screen">
<!-- HTML5 shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src="bootstrap-3.0.0/assets/js/html5shiv.js"></script>
<script src="bootstrap-3.0.0/assets/js/respond.min.js"></script>
<![endif]-->
</head>
<body>
<a class="btn" data-controls-modal="my-modal" data-backdrop="true" >Launch Modal</a>
<div class="container">
<div class="row">
<div class="col-md-1">.col-md-1</div>
<div class="col-md-1">.col-md-1</div>
<div class="col-md-1">.col-md-1</div>
<div class="col-md-1">.col-md-1</div>
<div class="col-md-1">.col-md-1</div>
<div class="col-md-1">.col-md-1</div>
<div class="col-md-1">.col-md-1</div>
<div class="col-md-1">.col-md-1</div>
<div class="col-md-1">.col-md-1</div>
<div class="col-md-1">.col-md-1</div>
<div class="col-md-1">.col-md-1</div>
<div class="col-md-1">.col-md-1</div>
</div>
<div class="row">
<div class="col-md-8">.col-md-8</div>
<div class="col-md-4">.col-md-4</div>
</div>
<div class="row">
<div class="col-md-4">.col-md-4</div>
<div class="col-md-4">.col-md-4</div>
<div class="col-md-4">.col-md-4</div>
</div>
<div class="row">
<div class="col-md-6">.col-md-6</div>
<div class="col-md-6">.col-md-6</div>
</div>
</div>
<script src="http://code.jquery.com/jquery.js"></script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script src="bootstrap-3.0.0/dist/js/bootstrap.min.js"></script>
<script type="text/javascript">
(function() {
var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true;
po.src = 'https://apis.google.com/js/plusone.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s);
})();
$('#my-modal').modal({
show:true,
closeOnEscape: true
});
</script>
</body>
</html>
我错过了什么?这是输出的屏幕截图