Theoretically,a Cargo Ship Safety Construction Certificate may be valid for_____.
A.5years
B.3years
C.5years and a extended period of 6months
D.3 years and a extended period of 3 months
正确答案是A
Theoretically,a Cargo Ship Safety Construction Certificate may be valid for_____.
A.5years
B.3years
C.5years and a extended period of 6months
D.3 years and a extended period of 3 months
正确答案是A