防冻防凝工作不必纳入巡检内容，各班不用进行交接（）
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RegardingEPIRB,whichisfalse？（）
A. Vessel information recovered from the digital encoded message provided by the satellite EPIRB.
B. Doppler shift of EPIRB signal is measured.
C. Information received from EPIRBs is time-tagged and transmitted to any Local User Terminal in the satellites view.
D. EPIRB works in the HF bands
WhatisARQ？（）
Automatic Receiver Quieting.
B. Automatic Repeat reQuest.
C. Automatically sent tRansmit Qsignals.
D. Automatic Relay without Question
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