A.Alaska Current
B.Subarctic Current
C.Kuroshio Current
D.Oyashio Current
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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
A.Northwest
B.Southeast
C.Northeast
D.Southwest
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.hydraulic current
B.rectilinear current
C.rotary current
D.harmonic current
A.Papagayo
B.fall wind
C.foehn
D.williwaw
最新試題
The presence of stratus clouds and a dying wind will usually result in（）.
The cold ocean current which meets the warm Gulf Stream between latitudes 40°and 43°N to form the cold wall is called the（）.
In most cases，the direction of the apparent wind lies between the bow and（）.
In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n)（）.
In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.
In some river mouths and estuaries the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstream，and is called a（）.
The place where a channel moves from along one bank of the river over to the other bank of the river is called a（）.
The direction of the surface wind is（）.
The currents are（）mosoonal origin．
In the Northern Hemisphere the major ocean currents tend to flow（）.