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单选题
1()时候,才可宣布遇险通信结束,恢复正常工作. 1)遇险船已经沉没 2)已经弃船 3)幸存者已被救起 4)有足够救助能力,无需进一步增援 5)已收到收妥承认
A
1/2/3/4/5
B
1/2/3
C
3/4/5.
D
1/2/3/4
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