A. 稳定 B. 不稳定 C. 时而稳定时而不稳定 D. 前三个选项都不对
A. (1,2,3,4,5,6,7,8) B. (8,7,6,5,4,3,2,1) C. (4,3,8,6,1,7,5,2) D. (2,1,5,4,3,6,7,8)
A. (18,22,30,46,51,68,75,83) B. (30,18,22,46,51,75,83,68) C. (46,30,22,18,51,75,68,83) D. (30,22,18,46,51,75,68,83)