问题
单项选择题
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
答案
参考答案：C
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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
参考答案：C