問題詳情

39. 船舶遇難發出無線電報警報信號，應如何發送？
(A) 2 個“劃（dash）”的信號，每一劃的為 4 秒鐘，而劃與劃之間隔時間為 1 秒鐘
(B) 3 個“劃（dash）”的信號，每一劃的為 4 秒鐘，而劃與劃之間隔時間為 1 秒鐘
(C) 4 個“劃（dash）”的信號，每一劃的為 4 秒鐘，而劃與劃之間隔時間為 1 秒鐘
(D) 12 個“劃（dash）”的信號，每一劃的為 4 秒鐘，而劃與劃之間隔時間為 1 秒鐘

參考答案

答案：D
難度：適中0.526316
統計：A(0),B(6),C(1),D(10),E(0)

用户評論

【ann410745】評論

依ITU無線電規則(Radio Regulations)第41條第3268款 The radiotelegraph alarm signal consists of a series of twelvendashes sent in one minute, the duration of each dash being four seconds and the duration of the interval between consecutive dashes onensecond. It may be transmitted by hand but its transmission by means ofnan automatic instrument is recommended.