Each EPIRB required on a ship shall be tested using the integrated test circuit and output indicator every（）.<br>A:week<br>B:two weeks<br>C:month<br>D:two months

Each EPIRB required on a ship shall be tested using the integrated test circuit and output indicator every（）.
A:week
B:two weeks
C:month
D:two months

出自：海船船员证

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