单项选择题

A.subtropical high pressure beltB.intertropical converg……

The belt of light and variable winds between the westerly wind belt and the northeast trade winds is called the（）.

A.subtropical high pressure belt
B.intertropical convergence zone
C.doldrum belt
D.polar frontal zone

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热门试题

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

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

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

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