单项选择题
Vessels lying afloat at buoys for more than 24 hours should use anchor chain for（）and insurance wire for（）.
A.bow mooring／stern line
B.forward spring／after spring
C.forward breast rope／forward spring
D.slip rope／stern line
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A.be crossed around the bow
B.tend out at right angles to the bow
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单项选择题
The ship is moored（）buoys.
A.of
B.on
C.alongside
D.to
