9万彩票

题目内容

Which statement about transmitting distress messages by radiotelephone is INCORRECT ().

A.Distress messages should first be transmitted on 2182 kHz
B.It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
C.If no answer is received on the designated distress frequencies,repeat the distress call on any frequency available
D.Channel 16(156.8 MHz)may be used for distress messages

请帮忙给出正确答案和分析,谢谢!
题目答案
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