单项选择题

When a vessel is alongside the wharf, it’s necessary for the ship to keep a （）hour gangway watch to guarantee the safety of the ship and the cargo.

A.12
B.8
C.24
D.48

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单项选择题

A.tight
B.high
C.slack
D.low

单项选择题

A.name
B.notice
C.new
D.now

单项选择题

A. deck watch
B. navigational watch
C. gangway watch
D. engine watch