单项选择题
A. Full ahead! B. Slow ahead! C. Half ahead! D. Ahead three.
前进二!（）A. Full ahead!B. Slow ahead!C. Half ahead!D. Ahea...
单项选择题前进二!（）
A. Full ahead! B. Slow ahead! C. Half ahead! D. Ahead three
在航向上吗？（）A. Are you on the course?B. Are you on the line...
单项选择题在航向上吗？（）
A. Are you on the course? B. Are you on the line ? C. Are you on the wheel? D. Are you on the route?
回到10！（）A. Ease to ten!B. Return to ten!C. Port ten!D. N...
单项选择题回到10！（）
A. Ease to ten! B. Return to ten! C. Port ten! D. Nothing to ten!
