单项选择题
A. Tramps B. Container ships C. Ro/Ro ships D. bulk carriers
（）(送出) two head lines ,one from each side.A. Heave away...
单项选择题（）(送出) two head lines ,one from each side.
A. Heave away B. Give out C. Take in D. Take away
We must（）(后移)one metre.A. shift aftB. shift asternC. mo...
单项选择题We must（）(后移)one metre.
A. shift aft B. shift astern C. move aft D. move back
We have to（）(前移)one metre.A. shift aheadB .shift headC....
单项选择题We have to（）(前移)one metre.
A. shift ahead B .shift head C. move forward D. shift forward
