单项选择题
A.cyclops B.fish eye C.thimble D.chip
A ketch is a sailing vessel with（）.A.one mastB.two mast...
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
A gypsy or gypsyhead is a（）.A.punt used for painting ov...
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
A flounder plate，on a topping lift，is（）.A.a fairlead bl...
单项选择题A flounder plate，on a topping lift，is（）.
A.a fairlead block B.a swivel pin for the topping lift block C.a triangular steel plate with a hole at each corner D.the lower block of a multiple part topping lift
