單項選擇題Anticyclones are usually characterized by().

A.dry,fair weather
B.high winds and cloudiness
C.gustiness and continuous precipitation
D.overcast skies


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1.單項選擇題An occluded front on a weather map is colored().

A.blue line
B.purple line
C.dashed blue line
D.alternate red and blue line

2.單項選擇題An aneroid barometer is an instrument().

A.used to measure the speed of wind
B.in which the pressure of the air is measured
C.that tells which direction a storm is coming from
D.used to measure the height of waves

3.單項選擇題An air mass is termed warm if().

A.it is above 70°F
B.the ground over which it moves is cooler than the air
C.it originated in a high pressure area
D.it originated in a low pressure area

4.單項選擇題All of the following are associated with cumulonimbus clouds EXCEPT().

A.steady rainfall
B.hail storms
C.thunderstorms
D.tornadoes or waterspouts

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

A.drops,and the temperature drops
B.drops,and the temperature rises
C.rises,and the temperature drops
D.rises,and the temperature rises