A.給文字定義下劃線 B.文字字號(hào)為12像素 C.定義文字間距為14像素 D.讓文字水平居右
A.background-position:rightbottom; B.background-position:righttop; C.background-position:leftbottom; D.background-position:lefttop;
A.opacity:0.5; B.filter:alpha(opacity=50) C.background:rgba(0,0,0,.5) D.background:opacity(0,0,0,.5)