问题
单项选择题
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
答案
参考答案：C
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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
参考答案：C