It's sometimes too difficult to understand the voices of American film.
如图,已知正方形ABCD的边长为22cm,将正方形ABCD在直线L上顺时针连续翻转4次,则点A所经过的路径长为( )
右图中圈表示磷酸基,五边形代表示五碳糖,长方形代表一种碱基,那么个图表示的分子是