A、which is assisted
B、that assist you
C、when you assisted
D、when being assisting
更多“（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals.”相关的问题
A、enter the pack on the windward side where there is a well defined ice edge B、trim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcement C、take maximum advantage of coastal leads caused by offshore winds D、look for areas of rotten ice and enter perpendicular to the ice edge
A、either trimmed by the head or the stern B、on an even keel C、trimmed down by the head D、trimmed down by the stern
A、A.Anchoring in the presence of ice is not recommended except in an emergency B、B.Towing a vessel through an ice field is not recommended except in an emergency C、C.The "Free and Proceed" system of escorting a beset vessel cuts down on the number of freeing operations D、D.When anchoring in ice，it is advisable to increase the scope of the chain over what is normally used for non-icing conditions
A、By backing down the track and cutting out ice on either bow B、By approaching from the stern and crossing ahead at an angle of 20°to 30°to the beset ship's course C、By overtaking the beset ship，running ahead and then backing down the track to the beset vessel D、By approaching the vessel from astern and towing the beset vessel stern first
A、A.By backing down the track and cutting out ice on either bow B、B.By approaching from the stern and crossing ahead at an angle of 20° to 30° to the beset ship's course C、C.By overtaking the beset ship，running ahead and then backing down the track to the beset vessel D、D.By approaching the vessel from astern and towing the beset vessel stern first
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