单项选择题
A.Heading B.Head C.Forward D.Ahead
Slow ahead（）engines!A. withB. bothC. andD. to
单项选择题Slow ahead（）engines!
A. with B. both C. and D. to
The pilot needs the ship to go forward very slowly. The...
单项选择题The pilot needs the ship to go forward very slowly. The order should be （）.
A. “Slow ahead” B. “Dead slow ahead” C. “Astern” D. “Dead slow astern”
Stand （）engine !A.withB.byC.inD.to
单项选择题Stand （）engine !
A.with B.by C.in D.to
