单项选择题
A.ventilate the quarters as much as possible
B.prepare to abandon ship
C.close all ventilation to the quarters if possible
D.attempt to put the fire out yourself before sounding the alarm
单项选择题 There is a fire aft aboard your vessel. To help fight the fire，you should（）.
单项选择题 There are two disadvantages to CO2 pump as a firefighting agent. One of these is the limited quantity available，and the other is（）.
单项选择题 The wooden plug inserted in the vent of a damaged tank of a ship should be removed in case it is decided to（）.