單項選擇題

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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單項選擇題

（）rain means it rains in some parts of the area.

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

單項選擇題

（）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