单项选择题
I would like to talk with the（二副）（）.
A. chief officer B. second officer C. third officer D. bosun
单项选择题 We should hoist national flag（）（按时）.
单项选择题 They will take（）(措施) against pirates and pilferage.
单项选择题 You should adjust the mooring lines according to the changes of（）(吃水).
