问题
单项选择题
Pump out No.2 port ballast tank to（）.
A.keep vessel afloating
B.refloat vessel listing to port
C.make vessel all-right
D.bring vessel upright
答案
参考答案：D
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Pump out No.2 port ballast tank to（）.
A.keep vessel afloating
B.refloat vessel listing to port
C.make vessel all-right
D.bring vessel upright
参考答案：D