A pattern according to which vessels and / or aircraft may conduct a co-ordinated search is a（）.<br>A:Research pattern<br>B:Research mode<br>C:Search pattern<br>D:Search and rescue mode

A pattern according to which vessels and / or aircraft may conduct a co-ordinated search is a（）.
A:Research pattern
B:Research mode
C:Search pattern
D:Search and rescue mode

出自：海船船员证

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