单项选择题
Anticyclones are usually characterized by（）.
A.dry，fair weather B.high winds and cloudiness C.gustiness and continuous precipitation D.overcast skies
单项选择题 An occluded front on a weather map is colored（）.
单项选择题 An aneroid barometer is an instrument（）.
单项选择题 An air mass is termed warm if（）.
