A.filter:alpha(opacity=0.8); B.filter:alpha(opacity:80); C.filter:opacity=80 D.filter:alpha(opacity=80);
A.陰影的顏色B.陰影水平偏移值C.陰影垂直偏移值D.陰影的模糊度
A.background:linear-gradient(left,#ff0,0%,#f00,100%); B.background:linear-gradient(top,#ff0,0%,#f00,100%); C.background:linear-gradient(top,#ff00%,#f00100%); D.background:linear-gradient(left,#ff00%,#f00100%);