Which of the following is (are) the international NAVTEX frequency (frequencies)?
A.518 KHz
B.490 KHz
C.4209.5 KHz.
D.All of these.
正确答案是A
Which of the following is (are) the international NAVTEX frequen
📱 扫码体验刷题小程序
扫一扫使用我们的微信小程序
热门题目
已复制到剪贴板