A.If
B.Shall
C.Should
D.Whether
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A.two certificates have expired
B.two certificates will expire
C.one of the two certificates have expired
D.one of the two certificates will expire
A.has the full force of the regular Certificate of Inspection
B.expires six months after it is issued
C.must be exchanged for a regular Certificate of Inspection within 3 months
D.is retained in the custody of the Master
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A head-on situation at night is one in which you see dead ahead a vessel showing（）.
All ships（）suspected infectious disease on board should radio information to Port Health Officer.
Permanent magnetism is found in（）.
Cargo transfer operations on a tank vessel need NOT be stopped when（）.
A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.
A large vessel is equipped with a controllable pitch propeller. Which statement is TRUE?（）
A safe fuel system must（）.
An obstruction on a helodeck is any object that might present a hazard to the（）.
It is not necessary to declare（）in the Health List.
A large metallic device，mounted directly in the piping (usually located at the dock near the point where the vapor hose is attached)，designed to prevent the passage of a rapidly moving flame through the piping is called a（）.