救生圈在甲板栏杆上。（）<br>A:The lifebuoys are on the main deck.<br>B:The lifebuoys are on the forecastle.<br>C:The lifeboat is on the deck railing.<br>D:The lifebuoys are on the deck railing.

救生圈在甲板栏杆上。（）
A:The lifebuoys are on the main deck.
B:The lifebuoys are on the forecastle.
C:The lifeboat is on the deck railing.
D:The lifebuoys are on the deck railing.

出自：船舶水手证

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