A. 2,4,3,9,12,12,11,11,18,9, B. 3,4,2,7,9,8,6,5,11,10, C. 2,3,1,6,8,7,5,4,10,9, D. 1,2,3,6,8,7,5,4,10,9,
A. 对 B. 错