单项选择题
A.two years
B.one year
C.until the next Coast Guard inspection
D.until the end of the voyage
单项选择题 To determine which grades of cargo a tank vessel is permitted to carry you should（）.
单项选择题 To determine the pressure and temperature limitations under which LFG is required to be transported on a barge，you should look at the（）.
单项选择题 The ventilation system of your ship has fire dampers restrained by fusible links. Which statement is TRUE? （）