问题
单项选择题
A Class S EPIRB is a（）.
A.submarine EPIRB
B.safety EPIRB
C.ship EPIRB
D.survival craft EPIRB
答案
参考答案：D
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A Class S EPIRB is a（）.
A.submarine EPIRB
B.safety EPIRB
C.ship EPIRB
D.survival craft EPIRB
参考答案：D