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业余电台BG1IN呼叫BG1DL的正确方式有:()

A.CQ CQ CQ,这里是BG1IN呼叫BG1DL
B.BG1DL、BG1DL、BG1DL,BG1IN呼叫,BG1DL、BG1DL、BG1DL,Over
C.BG1DL在这个频率上么,Over
D.BG1DL、BG1DL、BG1DL,BG1IN呼叫、BG1IN呼叫,听到请过来

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