單項選擇題After a cold front passes the barometric pressure usually（）.

A.fluctuates
B.remains the same
C.remains the same，with clouds forming rapidly
D.rises，often quite rapidly，with clearing skies


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1.單項選擇題A WIND BLOWS ROUND ANTICLOCKWISE defines（）.

A.Backing (of wind)
B.Beach (to)
C.Veering (of wind)
D.Maintaining direction of the wind

2.單項選擇題A weather map is a synoptic data because it（）.

A.summarizes a great deal of information
B.can be interpreted accurately
C.appears daily
D.is prepared by the Weather Bureau

3.單項選擇題A weather forecast states that the wind will commence backing. In the Northern Hemisphere，this would indicate that it will（）.

A.shift in a clockwise manner
B.shift in a counterclockwise manner
C.continue blowing from the same direction
D.decrease in velocity

4.單項選擇題A tropical wave is usually preceded by（）.

A.tropical storms
B.good weather
C.heavy rain and cloudiness
D.heavy seas

5.單項選擇題A tropical wave is located 200 miles due west of your position，which is north of the equator. Where will the wave be in 24 hours? （）

A.Farther away to the west
B.Farther away to the east
C.In the same place
D.Closer and to the west