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<title>Document</title>
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<p><input type="checkbox" class="check_all">全选</p>
<p><input type="checkbox" class="goods">商品1</p>
<p><input type="checkbox" class="goods">商品2</p>
<p><input type="checkbox" class="goods">商品3</p>
<p><input type="checkbox" class="check_all">全选</p>
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