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单选题
The principal advantage of NAVTEX radio warnings is that（）.
A
they can be used by mariners who do not know Morse code
B
only an ordinary FM radio is necessary to receive these warnings
C
information on a given topic is only broadcast at specified times
D
they cover a broad spectrum of the radio band allowing reception on almost any type of receiver
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更多 “单选题The principal advantage of NAVTEX radio warnings is that（）.A they can be used by mariners who do not know Morse codeB only an ordinary FM radio is necessary to receive these warningsC information on a given topic is only broadcast at specified timesD they cover a broad spectrum of the radio band allowing reception on almost any type of receiver” 相关考题
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考题
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考题
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考题
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SAFESEA
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The Principal Economist will become a board member.B
The Principal Economist will deal with environmental matters.C
The Principal Economist’s major responsibility is to make certain policy.
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