單項選擇題Little or no change in the barometric reading over a twelve hour period indicates（）.

A.stormy weather is imminent
B.that present weather conditions will continue
C.a defect in the barometer
D.increasing wind strength


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1.單項選擇題In the relatively calm area near the hurricane center，the seas are（）.

A.moderate but easily navigated
B.calm
C.mountainous and confused
D.mountainous but fairly regular as far as direction is concerned

2.單項選擇題In the doldrums you will NOT have（）.

A.high relative humidity
B.frequent showers and thunderstorms
C.steep pressure gradients
D.frequent calms

3.單項選擇題In the doldrums you can expect（）.

A.steady，constant winds
B.frequent rain showers and thunderstorms
C.steep pressure gradients
D.low relative humidity

4.單項選擇題In reading a weather map，closely spaced pressure gradient lines would indicate（）.

A.high winds
B.high overcast clouds
C.calm or light winds
D.fog or steady rain

5.單項選擇題In North America the majority of the weather systems move from（）.

A.north to south
B.south to north
C.east to west
D.west to east