计算(a﹣b)(a+b)(a2+b2)(a4﹣b4)的结果是( )
A:a8+2a4b4+b8
B:a8﹣2a4b4+b8
C:a8+b8
D:a8﹣b8
All the teachers are satisfied with our performances.
下列少数民族与其主要民族舞蹈或体育活动组合正确的是( )