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Which statement is generally correct regarding the maintenance requirements for ships under GMDSS（）.
A:Redundancy of functions of certain equipment will partially meet this requirement
B:On-board maintenance provided by a person holding a GMDSS maintainer's license will partially meet the requirements
C:Shoreside maintenance and scheduled tests and inspections will partially meet this requirement
D:All of the above

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出自：海船船员证

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