<hr>標(biāo)簽失效問(wèn)題
<div class="jumbotron">
? ? ? ? <h1>Hello, world!</h1>
? ? ? ? <hr>
? ? ? ? <p>This is a template for a simple marketing or informational website. It includes a large callout called a jumbotron and three supporting pieces of content. Use it as a starting point to create something more unique.</p>
<hr>zai bootstrap中是不是不起作用??
2015-07-13
<hr/>需要閉合！