Mariners should pay much attention in the overlapped area owing to（）.<br>A:complicated circumstances<br>B:changeable atmospheric pressure<br>C:large density of traffic<br>D:some strong signals from unwanted satellites

Mariners should pay much attention in the overlapped area owing to（）.
A:complicated circumstances
B:changeable atmospheric pressure
C:large density of traffic
D:some strong signals from unwanted satellites

出自：海船船员证

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