单项选择题
A.Shutting off electricity to damaged cables
B.Pumping fire-fighting water overboard
C.Maneuvering the vessel so the fire is on the lee side
D.Removing burned debris from the cargo hold
单项选择题 If a leak occurred while loading diethylenetriamine，the chemical data guide indicates you would smell an odor similar to（）.
单项选择题 Hoses used for cargo transfer operations must be tested and inspected at specified intervals by（）.
单项选择题 Each inert gas system gas main must have an automatic shut down valve at the outlet of the gas production plant. This valve must close automatically upon（）.