单项选择题
A.at the discretion of the inspector，but in no greater detail than required for original certification
B.at the discretion of the inspector，but in no lesser detail than required for original certification
C.generally similar in scope to the inspection required for certification，but in less detail
D.equivalent to the inspection required for certification
单项选择题 At（）an occasional survey has been carried out．
单项选择题 All the cargo holds must be（）cleaned out（）meet the requirement of the cargo surveyor.
单项选择题 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?（）