A call between any two ship stations on an intership working frequency shall have a maximum duration of（）.<br>A:2 minutes<br>B:3 minutes<br>C:4 minutes<br>D:5 minutes

A call between any two ship stations on an intership working frequency shall have a maximum duration of（）.
A:2 minutes
B:3 minutes
C:4 minutes
D:5 minutes

出自：海船船员证

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