单项选择题
A.either B.neither C.none D.no
Vessels transiting the canal must have their accommodat...
单项选择题Vessels transiting the canal must have their accommodation ladders and cargo booms（）.
A.removed B.rigged in C.readjusted D.tested
Vessel on her delivery shall be ready to receive cargo ...
单项选择题Vessel on her delivery shall be ready to receive cargo with clean-swept holds and（）and in every way fitted for ordinary cargo service.
A.right，correct and safe B.sufficient，efficient and coefficient C.nice，tidy and in good working condition D.tight，staunch and strong
Variation is not constant; it is different with every c...
单项选择题Variation is not constant; it is different with every change in（）.
A.speed B.vessel heading C.geographical location D.cargo
