单项选择题
Canvas sails，when not in use，may be damaged if（）.
A.left in the sunlight
B.stowed wet
C.folded frequently
D.washed with soap and water
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相关考题
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单项选择题
An ocean towing bridle should（）.
A.have equal legs of sufficient length
B.have a large angle between the legs
C.be formed on a bight of cable through a ring
D.never be made up of chain -
单项选择题
A tow bridle is attached to the main tow hawser at the（）.
A.bight ring
B.tow hook
C.fishplate
D.swivel -
单项选择题
A term used to describe the dip in a towline that acts as a shock absorber is（）.
A.catenary
B.step
C.shock dip
D.bight
