单项选择题
--- Port five! ----Port five!（）!
A. Wheel port five B. Port five C. Port is five D. Yes
单项选择题 Duty officer and （）keep navigational watches on the bridge at sea.
单项选择题 ---“（）” ---“Two degrees on starboard.”
单项选择题 “Port a little sluggish” means（）
