就是说,我在一个DIV标签里面插入了几张图片,但是定义的CSS规则是对所有的图片有效,怎么分开的为每一个图片新建CSS规则
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<div id="left">
<span class="img1"><img src="....></span>
<span class="img2"><img src="....></span>
<span class="img3"><img src="....></span>
<span class="img4"><img src="....></span>
<div id="right></div>
</div>
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<div id="left">
<span class="img1"><img src="....></span>
<span class="img2"><img src="....></span>
<span class="img3"><img src="....></span>
<span class="img4"><img src="....></span>
<div id="right></div>
</div>
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