It is the responsibility of the person in charge to（）.<br>A:revise the operating manual when rig personnel change<br>B:be fully aware of the provisions in the operating manual<br>C:maintain the rig's construction portfolio<br>D:All of the above

It is the responsibility of the person in charge to（）.
A:revise the operating manual when rig personnel change
B:be fully aware of the provisions in the operating manual
C:maintain the rig's construction portfolio
D:All of the above

出自：海船船员证

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