单项选择题
A.Engine room ventilation should be started
B.Main engines should be secured
C.The fire pump should be started
D.The fixed CO2 system should be activated
单项选择题 When the general alarm is sounded continuously, the engine room personnel should （）.
单项选择题 Which of the following actions should be taken by the engine room watch when the general alarm is sounded continuously?（）
单项选择题 As soon as you hear the fire and emergency signal, you should ensure that the （）.