Reliable delivery of messages is ensured by（）techniques.<br>A:forward error correction<br>B:aftward error correction<br>C:DGPS<br>D:error-free and low error reception

Reliable delivery of messages is ensured by（）techniques.
A:forward error correction
B:aftward error correction
C:DGPS
D:error-free and low error reception

出自：海船船员证

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