答案:A
A. (A)司机
B. (B)车站值班员
C. (C)车站调度员
A. (A)1/3
B. (B)1/2
C. (C)2/3
A. (A)八
B. (B)九
C. (C)十
A. (A)140
B. (B)120
C. (C)100