The diurnal variation of pressure is most noticeable().
A、above the polar circles
B、in a low pressure area
C、during periods of low temperatures
D、in the doldrums
A、above the polar circles
B、in a low pressure area
C、during periods of low temperatures
D、in the doldrums
A、motion of the Earth in its orbit B、rotation of the Earth on its axis C、the body's orbital motion during the time required for its light to reach the Earth D、a false horizon
A、daily lapse reading B、diurnal variation of pressure C、pressure tendency D、synoptic pressure
A、They occur only at quadrature B、They occur when the Moon is nearest the Earth C、They cause diurnal tides to become mixed D、They have a decreased range from normal
A、only one high and one low water occur during a lunar day B、the high tide is higher and the low tide is lower than usual C、the high tide and low tide are exactly six hours apart D、two high tides occur during a lunar day
A、only one high and one low water occur during a lunar day B、the high tide is higher and the low tide is lower than usual C、the high tide and low tide are exactly six hours apart D、two high tides occur during a lunar day
A、only one high and one low water occur during a lunar day B、the high tide is higher and the low tide is lower than usual C、the high tide and low tide are exactly six hours apart D、two high tides occur during a lunar day