题目:若div的上边框样式为点线,下边框样式为点线,左边框样式为虚线,右边框样式为虚线,使用CSS对该div边框样式进行设置,下面代码中错误的是( )。
div{border-top-style:dotted;
border-left-style:dashed;
border-bottom-style:dotted;
border-right-style:dashed;}
div{border-style:dotted dashed;}
div{border-style:dotted dashed dotted;}
div{border-style:dotted dotted dashed dashed;}