The International Sewage Pollution Prevention Certificate shall be issued for a period specified by the Administration, which shall not exceed from the date of issue（）<br>A:six months<br>B:one year<br>C:three year<br>D:five years

The International Sewage Pollution Prevention Certificate shall be issued for a period specified by the Administration, which shall not exceed from the date of issue（）
A:six months
B:one year
C:three year
D:five years

出自：海船船员证

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