单项选择题
A.行内样式B.外部样式C.内部样式D.浏览器样式
A.rgb(255,0,0)B.rgba(255,0,0,0)C.rgb(#00FFFF)D.hsl(240,100%,50%)
A.< a>B.< table>C.< div>D.< frameset>