An International Ship Security Certificate shall be issued for a period specified by the Administration which shall not exceed （）<br>A:six months<br>B:two years<br>C:four years<br>D:five years

An International Ship Security Certificate shall be issued for a period specified by the Administration which shall not exceed （）
A:six months
B:two years
C:four years
D:five years

出自：海船船员证

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