单项选择题
A.air being warmed above the dew point B.saturation of cold air by rain C.a rapid cooling of the air near the surface of the Earth at night D.warm moist air being blown over a colder surface
Advection fog holds longest over which portions of the ...
单项选择题Advection fog holds longest over which portions of the lakes?（）
A.Northwest B.Southeast C.Northeast D.Southwest
A tide is called diurnal when（）.A.only one high and one...
单项选择题A tide is called diurnal when（）.
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 swift current occurring in a narrow passage connectin...
单项选择题A swift current occurring in a narrow passage connecting two large bodies of water which is produced by the continuously changing difference in height of tide at the two ends of the passage is called a(n)（）.
A.hydraulic current B.rectilinear current C.rotary current D.harmonic current
