A. 1,2,3,4,9,8,7,6,5,0, B. 0,9,8,7,6,5,1,2,3,4, C. 0,9,8,7,6,5,4,3,2,1, D. 1,2,3,4,5,6,7,8,9,0,
A. 对 B. 错