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<p><mark>练习练习练习</mark><del>练习练习练习练习练习</del><ins>练习练习练习</ins>练习练习<u>练习练习</u>练习练习练习<small>练习练习练习</small>练习<strong>练习</strong>练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习</p>
<p>练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习练习</p>
<p class="text-left">mukew</p>
<p class="text-center">mukew</p>
<p class="text-right">mukew</p>
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<link rel="stylesheet" href="bootstrap-theme.min.css">用错样式表，用这个bootstrap.min.css