A.abyssal plain
B.continental shelf
C.borderland
D.offshore terrace
您可能感興趣的試卷
你可能感興趣的試題
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
A.navigable semicircle
B.dangerous semicircle
C.low pressure area
D.eye of the storm
最新試題
The apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.
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)（）.
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 height of a wave is the vertical distance（）.
The direction of the southeast trade winds is a result of the（）.
Steam fog is most likely to occur on the Mississippi and Ohio Rivers in（）.
In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.
The drift and set of tidal，river，and ocean currents refer to the（）.
In the Northern Hemisphere the major ocean currents tend to flow（）.
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)（）.