水手长，我们为什么要开舱盖?（）<br>A:Bosun, why do we open hatch covers?<br>B:Officer, why do we open hatch covers?<br>C:Bosun, why do we close hatch covers?<br>D:Bosun, why do we open hatches?

水手长，我们为什么要开舱盖?（）
A:Bosun, why do we open hatch covers?
B:Officer, why do we open hatch covers?
C:Bosun, why do we close hatch covers?
D:Bosun, why do we open hatches?

出自：船舶水手证

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