A. background-color:linear-gradient(to right,red,white); B. background-image:linear-gradient(to right,red,white); C. background:linear-gradient(to right,red,white);
A. float:left; B. clear:left;
A. B. C. D.
A. B. 选项1选项2选项3 C. 选项1选项2选项3