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<p>请把鼠标移动到这些链接上，以查看效果：</p>
<p><b><a class="one" href="http://www.baidu.com" target="_blank">这个链接改变颜色</a></b></p>
<p><b><a class="two" href=" http://www.baidu.com " target="_blank">这个链接改变字体大小</a></b></p>
<p><b><a class="three" href=" http://www.baidu.com " target="_blank">这个链接改变背景颜色</a></b></p>
<p><b><a class="four" href=" http://www.baidu.com " target="_blank">这个链接改变字体系列</a></b></p>
<p><b><a class="five" href=" http://www.baidu.com " target="_blank">这个链接改变文本装饰</a></b></p>
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