A、(A)超前
B、(B)滞后
C、(C)核准
答案:B
A. (A)1/2
B. (B)1/3
C. (C)2/3
A. A.74—123
B. B.90—120
C. C.50—90
A. (A)5km/h
B. (B)10km/h
C. (C)15km/h
A. (A)6.5
B. (B)650
C. (C)6500
A. (A)进站
B. (B)出站
C. (C)通过