问题
单项选择题
The vessel’s Emergency Position Indicating Radio beacon (EPIRB) must be tested（）.
A.weekly
B.monthly
C.every 2 months
D.every 3 months
答案
参考答案：B
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The vessel’s Emergency Position Indicating Radio beacon (EPIRB) must be tested（）.
A.weekly
B.monthly
C.every 2 months
D.every 3 months
参考答案：B