niudn.com/100x100)"></span>
                    </div>
                </li>
                <li class="ui-border-t">
                    <h4>80*80头像</h4>
                    <div class="ui-avatar-s">
                        <span style="background-image:url(http://placeholder.qiniudn.com/80x80)"></span>
                    </div>
                </li>
                <li class="ui-border-t">
                    <h4>140*140头像</h4>
                    <div class="ui-avatar-lg">
                      