Coast Guard regulations require a shipboard Oil Pollution Emergency Plan to be reviewed（）.<br>A:annually<br>B:once every two years<br>C:once every four years<br>D:once every five years

Coast Guard regulations require a shipboard Oil Pollution Emergency Plan to be reviewed（）.
A:annually
B:once every two years
C:once every four years
D:once every five years

出自：海船船员证

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