单项选择题
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
（）（班轮）sail on regular routes.A. Light shipsB. Lift craf...
单项选择题（）（班轮）sail on regular routes.
A. Light ships B. Lift crafts C. Liners D. Tramps
