单选题The abandon ship signal sounded by the vessels whistle is （）.A6 short blasts and 1 long blastBlong blast mare than 6 short blastsCmore than 6 short blasts and 1 long blastD1 long blast of at least 10 seconds
单选题
The abandon ship signal sounded by the vessels whistle is （）.
A
6 short blasts and 1 long blast
B
long blast mare than 6 short blasts
C
more than 6 short blasts and 1 long blast
D
1 long blast of at least 10 seconds
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