單項選擇題On the pole side of the high pressure belt in each hemisphere,the pressure diminishes. The winds along these gradients are diverted by the Earth’s rotation toward the east and are known as the().

A.geostrophic winds
B.doldrums
C.horse latitudes
D.prevailing westerlies


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1.單項選擇題On a working copy of a weather map,a cold front is represented by what color line? ()

A.Red
B.Blue
C.Alternating red and blue
D.Purple

2.單項選擇題Navigational warnings and weather bulletins for shipping()from Singapore Radio.

A.broadcast
B.broadcasted
C.are broadcast
D.are broadcasted

4.單項選擇題Most high pressure areas are accompanied by().

A.precipitation
B.clear,cool weather
C.humid,sticky weather
D.cool fogs