填空题 Each of the nine squares in the grid marked A1 to C3 should incorporate all the lines and symbols which are shown in the squares of the same letter and number immediately above and to the left. One of the squares is incorrect. Which one is it?
  • 1、
【正确答案】 1、B1    
【答案解析】图B1不正确。图B和图1两个图形合并后，图1没有保持原样。