Each open lifeboat carried on a vessel on an international voyage must have（）.<br>A:hand-propelling gear<br>B:a davit span with at least 2 lifelines<br>C:a mast and a sail<br>D:a motor

Each open lifeboat carried on a vessel on an international voyage must have（）.
A:hand-propelling gear
B:a davit span with at least 2 lifelines
C:a mast and a sail
D:a motor

出自：海船船员证

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