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