题目

In white shirt, blue pants, black cloth shoes and two pigtails (辫子), Jingqiu gives off an air of great “pure beauty” in Zhang Yimou’s new movie Under the Hawthom Tree.《山揸树之恋》 The film tells the story of the sad romance of Jingqiu and a handsome young man named Laosan. Set at the end of the “cultural revolution” (1966-1976), the pair manage to fall in love although they come form different political environments. Before it was released, moviegoers speculated (推测) on just what this “pure beauty” could be. Director Zhang complained of how long it had taken him 下列各式能用平方差公式计算的是（ ）A. (2x+y)(2y+x) B. (x+1)(-x﹣1) C. (－x﹣y)(－x+y) D. (3x－y)(－3x+y)