相关试题
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According to SMCP，When the information requested cannot be obtained, say: Negative
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According to SMCP，When a message is not properly heard, say: Say again(please)
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According to SMCP，When a mistake is made in a message, say:Mistaken - followed by the word:Correcti
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According to SMCP，When it is accepted to remain on the VHF channel / frequency indicated, say: Stan
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According to SMCP，When the transmissions of a radio station , etc., have broken down, switched off o