The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.<br>A:sometimes<br>B:all times<br>C:never<br>D:partly

The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
A:sometimes
B:all times
C:never
D:partly

出自：海船船员证

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