1:float:left;display:inline; list-style:none;
2:float:left;display:inline; list-style:none outside none;
3: float:left;display:inline;list-style:none inside none;
4:float:left;display:inline;未做css reset
5: 无 display,float属性 list-style为none;
6: 无 display,float属性 无list-style:none;