问题
单项选择题
Delay due to port congestion,pilots,tugs not available is a:()
A.Contingency;
B.Emergency;
C.A or B;
D.not A nor B.
答案
参考答案:B
Delay due to port congestion,pilots,tugs not available is a:()
A.Contingency;
B.Emergency;
C.A or B;
D.not A nor B.
参考答案:B