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
Steam fog is most likely to occur on the Mississippi and Ohio Rivers in（）.
The drift and set of tidal，river，and ocean currents refer to the（）.
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 currents are（）mosoonal origin．
In the Northern Hemisphere the major ocean currents tend to flow（）.
The direction of the southeast trade winds is a result of the（）.
The horse latitudes are characterized by（）.
In the Northern Hemisphere you are caught in the dangerous semicircle with plenty of sea room available. The best course of action is to bring the wind on the（）.
The place where a channel moves from along one bank of the river over to the other bank of the river is called a（）.
Ocean currents are well defined and（）.