单项选择题
Pressure gradient is a measure of（）.
A.a high-pressure area
B.pressure difference over horizontal distance
C.pressure difference over time
D.vertical pressure variation
点击查看答案&解析
相关考题
-
单项选择题
On what does the operation of an aneroid barometer depend?（）
A.Thin，metal，air tight cell
B.Curved tube containing alcohol
C.Column of mercury supported by atmospheric pressure
D.Expansion of mercury in a closed tube -
单项选择题
MODERATE WAVES，TAKING A MORE PRONOUNCED LONG FORM；MANY WHITE HORSES ARE FORMED.THIS sea condition is likely to be termed（）.
A.moderate breeze
B.fresh breeze
C.strong breeze
D.near gale -
单项选择题
In the Northern Hemisphere，winds veering sharply to the west or northwest with increasing speed are indications that a（）.
A.cold front has passed
B.low pressure center is approaching
C.stationary front exists
D.high pressure center has passed
