A、the rotation of the earth on its axis
B、convection currents caused by differences in radiant heating between equatorial and polar regions
C、mountain ranges
D、All of the above
更多“Air circulation is caused or affected by（）.”相关的问题
A、is made to circulate out of the system B、is made to circulate within the system C、is made circulate within the system D、is made circulate out of the system
A、low relative humidity is maintained B、triple banded squirrel cage fans are used C、air circulation is a maximum D、high relative humidity is maintained
A、rising warm air B、proximity to a low pressure area C、inward spiraling circulation D、clear dry weather
A、density differences of the water B、rotation of the earth C、direction of primary circulation of air D、all of the above
A、dirty delivery ducts B、too much refrigerant C、the fouling filters D、high temperature outside
A、A room thermostat activates an electric heater at each individual chilled air outlet when necessary B、Varying the number of passes the air makes across the coils C、Varying the temperature of the water through the coils D、Varying the quantity of water flowing through the coils
A、water-tube supercritical circulation B、water-tube forced circulation C、fire-tube controlled circulation D、fire-tube express circulation
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