()设置从左上角开始(到右下角)的线性渐变,起点是红色,慢慢过渡到蓝色。
A.
background: linear-gradient(to right, red , blue);
B.
background: linear-gradient(to bottom right, red , blue);
C.
background: linear-gradient(red, blue);
D.
background: radial -gradient(to bottom right, red , blue);