A.draft
B.cutoff
C.draw
D.crossing
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A.abyssal plain
B.continental shelf
C.borderland
D.offshore terrace
A.of the wave's crest
B.of the wave's trough
C.measured from crest to trough
D.measured from crest to crest
A.at right angles to the flow of the current
B.against the flow of the current
C.in the same direction as the flow of the current
D.over slack water
A.weak pressure gradients and light，variable winds
B.the formation of typhoons or hurricanes in certain seasons
C.steady winds in one direction for six months followed by wind reversal for the next six months
D.steady winds generally from the southeast in the Southern Hemisphere
A.from the still water plane to the crest
B.from the still water plane to the trough
C.from crest to trough
D.between water levels at one-quarter of the wave's length
最新試題
The presence of stratus clouds and a dying wind will usually result in（）.
The currents are（）mosoonal origin．
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)（）.
The direction of the southeast trade winds is a result of the（）.
The horse latitudes are characterized by（）.
A tide is called diurnal when（）.
Low pressure disturbances，which travel along the intertropical convergence zone，are called（）.
In shallow water，waves that are too steep to be stable，causing the crests to move forward faster than the rest of the wave，are called（）.
Ocean currents are well defined and（）.
Advection fog is most commonly caused by（）.