单项选择题
A.subtropical high pressure belt B.intertropical convergence zone C.doldrum belt D.polar frontal zone
The atmosphere in the vicinity of a high pressure area ...
单项选择题The atmosphere in the vicinity of a high pressure area is called a(n)（）.
A.anticyclone B.cold front C.occluded front D.cyclone
Prior to reading an aneroid barometer，you should tap th...
单项选择题Prior to reading an aneroid barometer，you should tap the face lightly with your finger to（）.
A.expose any loose connections B.demagnetize the metal elements C.bring the pointer to its true position D.contract and expand the glass face
Pressure gradient is a measure of（）.A.a high-pressure a...
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
