A.A flashing amber light
B.A fixed red light
C.A white flag raised and lowered vertically
D.A flashing white light
您可能感兴趣的试卷
你可能感兴趣的试题
A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current
A.heavy
B.easily damaged
C.affected by temperature
D.costly relative to the strength ratio
A.stopper
B.screen
C.filter
D.restrictor
A.rising warm air
B.proximity to a low pressure area
C.inward spiraling circulation
D.clear dry weather
A.Has there been
B.Have there been
C.Has there
D.Have there
A.From
B.By
C.on
D.With
A.Have
B.Has
C.Is there
D.Are there
A.Have
B.Has
C.Has there been
D.Are there
A.If
B.Shall
C.Should
D.Whether
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
最新试题
All ships（）suspected infectious disease on board should radio information to Port Health Officer.
A large valve，usually installed above the ram preventers，that forms a seal in the annular space between the pipe and wellbore or，if no pipe is present，on the wellbore itself is called the（）.
A large vessel is equipped with a controllable pitch propeller. Which statement is TRUE?（）
A fixed carbon dioxide extinguishing system for a machinery space，designed WITHOUT a stop valve in the line leading to the protected space，is actuated by（）.
An inert gas system installed on a tanker is designed to（）.
An inert gas system on a tanker should be used to（）.
Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.
Permanent magnetism is caused by（）.
After sending a message describing the symptoms of an ill crew member，you receive a message containing the code MRL. This means（）.
A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.