单选题A ketch is a sailing vessel with（）.Aone mastBtwo masts: with the mizzen stepped abaft the rudder postCtwo masts: with the mizzen stepped forward of the rudder postDtwo masts: a foremast and a mainmast
单选题
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
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