<select class="last_center">
? <option>微信/QQ/Twitter/Facebook</option>
? <option>微信</option>
? <option>QQ</option>
? <option>Twitter</option>
? <option>Facebook</option>
</select>
————————————————
/*select居中*/
.last_center{text-align:center;text-align-last:center;}
/*select右對(duì)齊*/
.last_right{text-align:center;text-align-last:right;}
/*select option右對(duì)齊*/
select option{direction:rtl;}
————————————————
