单项选择题
A. Full ahead! B. Slow ahead! C. Half ahead! D. Ahead three
A. Are you on the course? B. Are you on the line ? C. Are you on the wheel? D. Are you on the route?
A. Ease to ten! B. Return to ten! C. Port ten! D. Nothing to ten!
A. Meet her! B. Meet him! C. Meet the rudder! D. Hard over!
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