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