A “check” line is（）.<br>A:a safety line attached to a man working over the side<br>B:used to measure water depth<br>C:used to slow the headway of a barge<br>D:used to measure the overhead height of a bridge

A “check” line is（）.
A:a safety line attached to a man working over the side
B:used to measure water depth
C:used to slow the headway of a barge
D:used to measure the overhead height of a bridge

出自：海船船员证

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