单项选择题
Vessels are warned（）in this area.
A.to not anchor
B.to anchor not
C.not to anchor
D.not anchor to
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单项选择题
Vessels carrying（）must not willfully wash decks or holds.
A.general cargo
B.steel products
C.harmful cargo
D.machinery -
单项选择题
Vessels must be（）valid certificate of nationality or certificated of registry or license.
A.acquiring
B.with possession of
C.required for
D.in possession of -
单项选择题
Vessels must not “exceed” a speed of 8 knots in this area.（）.
A.sail at
B.except
C.proceed at
D.steam over
