单选题Two mooring lines may be placed on the same bollard and either one cast off first if（）.Athe eye of the second line is dippedBthe mooring lines are doubledCthe bollard has two hornsDone of the lines is a breast line
单选题
Two mooring lines may be placed on the same bollard and either one cast off first if（）.
A
the eye of the second line is dipped
B
the mooring lines are doubled
C
the bollard has two horns
D
one of the lines is a breast line
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