单项选择题
--- Midships! ----Midships!（）
A. Wheel’s midships! B. Course on. C. Wheel's well！ D. OK.
单项选择题 ----Hard-a-port! ----Hard-a-port!（）!
单项选择题 --- Port five! ----Port five!（）!
单项选择题 Duty officer and （）keep navigational watches on the bridge at sea.
