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如下代码片断,当鼠标移到图片上时,显示的内容是:
<IMG src="http://hovertree.com/texiao/css/20/images/hewenqileft.png" name="hewenqi" onMouseOver= "src='http://hovertree.com/texiao/css/20/images/hewenqiright.png'" onMouseOut="src='http://hovertree.com/texiao/css/20/images/hewenqileft.png'" alt="何问起对联。">


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