单项选择题

The most important information to be obtained from a ba……

The most important information to be obtained from a barometer is the（）.

A.difference between the reading of the two pointers，which shows wind direction
B.last two figures of the reading of the pointer，such as 87，76，or 92
C.present reading of the pressure，combined with the changes in pressure observed in the recent past
D.weather indications printed on the dial (such as cold，wet，etc.) under the pointer

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单项选择题The legend symbol which designates an occluded front is represented by a（）.

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

单项选择题The inner cloud bands of a hurricane，when viewed from a distance，form a mass of dense，black cumulonimbus clouds called the（）.

A.bar of the storm
B.eye of the storm
C.funnel
D.front

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A.dryer the air mass will be
B.cooler the temperature will be
C.greater the force of the wind will be
D.warmer the temperature will be

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A.nimbostratus
B.stratus
C.cirrocumulus
D.cumulonimbus

单项选择题The fog produced by warm moist air passing over a cold surface is called（）.

A.conduction fog
B.radiation fog
C.frontal fog
D.advection fog