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<div id="div0" style="width:100px; height:50px; background-color:#CCCCCC">信息更新</div>
<div id="div1" style="width:100px; height:50px; background-color:#CCCCCC">问卷调查</div>
<div id="div2" style="width:100px; height:50px; background-color:#CCCCCC">图片显示</div>
<div id="div3" style="width:100px; height:50px; background-color:#CCCCCC">文字表述</div>
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