border属性练习

<p>border属性小练习，做的两个简单页面</p>

<p><a class=“case-show” href=“http://moshanghua.oss-cn-shanghai.aliyuncs.com/demo/html/Box-foundation-exercise.html” target=“_blank”>border属性演示一</a></p>
<p><a class=“case-show” href=“http://moshanghua.oss-cn-shanghai.aliyuncs.com/demo/html/Box-foundation-exercise_2.html” target=“_blank”>border属性演示二</a></p>