单项选择题

A cold front moving in from the northwest can produce（）.

A.thunderstorms，hail，and then rapid clearing
B.increasing cloud cover lasting for several days
C.lengthy wet weather
D.low ceilings with thick cirrus clouds

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热门试题

单项选择题（）rain means it rains in some parts of the area.

A.Squally
B.Isolated
C.Scattered
D.Occasional

单项选择题（）moving rather quickly east expected 150 miles south of Cape Farewell 972 by 160000 GMT.

A.Developed low
B.Developing low
C.Being developed low
D.Low to be developed

单项选择题（）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

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