单项选择题
A. Release a lifebuoy B. Start the pump C. Get a fire extinguisher D. Call the captain
A. inform the bridge and give the alarm at once B. cut off the circuits and turn off ventilating blowers first C. call the captain first D. report to the duty officer
A. one person should do one job B. one job should be done by all crew C. one person should do all jobs D. one job may be done by more than one person