单项选择题
Preventive maintenance （）.
A.should not be carried out during the watches B.can only be carried out in port C.is a kind of maintenances carried out prior to the occurrence D.is a kind of maintenances carried out after the occurrence
单项选择题 The safety management objectives of the ISM Code are （）.
单项选择题 The term “the Company” in the ISM Code is defined as （）.
单项选择题 The“person in the phrase ”to designate a person or persons ashore having direct access to the highest level of management” refers to （）.
