单项选择题
For the duties assigned in the muster list, （）.
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
单项选择题 The station lists are posted （）on board a ship.
单项选择题 Bring your immersion suit. Meet in front of the （）.
单项选择题 Never extinguish oil and electrical fires with （）.
