单项选择题
A metal object on the pier resembling a tree stump and made to receive mooring lines is a（）.
A.bight
B.bollard
C.chock
D.camel
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单项选择题
A metal eye spliced into a wire is called a（）.
A.cyclops
B.fish eye
C.thimble
D.chip -
单项选择题
A ketch is a sailing vessel with（）.
A.one mast
B.two masts: with the mizzen stepped abaft the rudder post
C.two masts: with the mizzen stepped forward of the rudder post
D.two masts: a foremast and a mainmast -
单项选择题
A gypsy or gypsyhead is a（）.
A.punt used for painting over the side
B.small，reciprocating steam engine
C.spool-shaped drum fitted on a winch
D.swinging derrick
