A.be visible from both sides and from forward and aft
B.indicate NO SMOKING
C.be displayed only while transferring cargo and fast to a dock
D.use black lettering on a white background
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A.COW
B.LOT
C.CBT
D.coferdam
A.Draft and trim
B.Limits of the bending moments
C.Rate of discharging
D.Rate of loading
A.at least
B.at most
C.so big as
D.as large as
A.Down by the bow
B.Down by the stern
C.Down by either the bow or stern
D.In level trim
A.righting arm
B.metacentric height
C.height of the uncorrected KG
D.natural rolling period
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Every new crude oil tanker of 20000 tons deadweight and above shall be fitted with a cargo tank cleaning system using（）.
Individual wires，used in systems greater than 50 volts,（）.
Notwithstanding the provisions of this Regulation，the segregated ballast conditions for oil tankers less than 150 meters in length shall be to the（）of the Administration.
Protective clothing must be worn while sampling hazardous cargo on a tanker，and as a minimum includes（）.
Functions aboard a tanker or tank barge such as connecting，disconnecting，and topping off must be supervised by（）.
Chemical Tankers are generally referred to the cargo ships constructed or adapted and used for the carriage of（）.
On a vessel carrying grades A，B，C or D cargoes，enclosed spaces where sources of vapor ignition are normally present shall NOT be segregated from cargo tanks by（）.
Before you start an engine in a compartment，it’s MOST important to（）.
After an IOPP Certificate is issued to an inspected vessel，how many other surveys of the vessel’s pollution prevention equipment are conducted during the period of validity of the certificate?（）
Litmus paste is used in order to determine（）.