单项选择题

A.SHLWB.SCTDC.OBSD.SW（）LOW ELY SLWLY WITH COLD FRONT FM……

（）LOW ELY SLWLY WITH COLD FRONT FM CEN TO 12N 179W AND WARM FROM FM CEN TO 11N 171W.

A.SHLW
B.SCTD
C.OBS
D.SW

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热门试题

单项选择题The Routing System which aimed at reducing the risk of casualties is called as（）.

A.Traffic Separation Schemes
B.Recommended tracks
C.Precautionary areas
D.Inshore traffic zones

单项选择题When winds of force reach 10-11 in Beaufort Scale，usually we call such winds as（）.

A.Hurricane
B.Breeze
C.Storm
D.Gale