问题
单项选择题
（）will be broadcast every one hour on VHF Channel 6.
A.VHF news
B.Channel rules
C.Visibility time
D.Navigational warnings
答案
参考答案：D
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（）will be broadcast every one hour on VHF Channel 6.
A.VHF news
B.Channel rules
C.Visibility time
D.Navigational warnings
参考答案：D