<div class="item">
<input type="radio" name="item" title="this is radio checked">
</div>
<div class="item">
<input type="radio" name="item" title="this is radio text">
</div>
<div class="item">
<input type="radio" name="item" title="this is radio text">
</div>
<div class="item">
<input type="radio" name="item" title="this is radio text">
</div>
我想要给#list里面的第二个div里面的input添加属性该如何添加?