問題詳情
15. 「摩爾斯碼信號」中，「‧‧‧‧(點、點、點、點)」代表何信號？
(A) H
(B) K
(C) M
(D) X
(A) H
(B) K
(C) M
(D) X
參考答案
答案：A
難度：計算中-1
書單：沒有書單，新增
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