单项选择题

A sylphon cell is a part of a（）.

A.maximum thermometer
B.barograph
C.thermograph
D.hygrometer

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单项选择题

A.that blows towards the sea at night
B.that blows towards an island during the day
C.caused by cold air descending a coastal incline
D.caused by the distant approach of a hurricane

单项选择题

A millibar is a unit of（）.

A.humidity
B.precipitation
C.pressure
D.temperature

单项选择题

A microbarograph is a precision instrument that provides a（）.

A.charted record of atmospheric temperature over time
B.charted record of atmospheric pressure over time
C.graphic record of combustible gases measured in an atmosphere
D.graphic record of vapor pressure from a flammable/combustible liquid