gmdss

Ships sailing in area A2 will at least be capable of transmitting a ship-to-shore alert on__.

发布于 2021-04-18 17:39:50

【单选题】
A COSPAS-SARSAT
B 156.525 MHz DSC
C 2,187.5 kHz DSC and satellite EPIRB
D 2,182 kHz R/T and satellite EPIRB

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芒果慕斯 2023-04-18

每件事情都必须有一个期限，否则，大多数人都会有多少时间就花掉多少时间。

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michael1062

这家伙很懒，什么也没写！

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