题目详情
单选题 Which are the preferred frequencies in radiotelephony for on-scene communications
A. 121.5 MHz and 2,045 kHz
B. Ch 70 (156.525 MHz) and 2,174.5 kHz
C. Ch 11 (156.650 MHz) and 2,021 kHz
D. Ch 16(156.800 MHz) and 2,182 kHz

学科:GMDSS 英语
时间:2023-10-25 10:56:56
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