A.of the wave's crest
B.of the wave's trough
C.measured from crest to trough
D.measured from crest to crest
您可能感興趣的試卷
你可能感興趣的試題
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
A.position and area of the current
B.speed and direction toward which the current flows
C.type and characteristic of the current's flow
D.None of the above
最新試題
A tide is called diurnal when（）.
The presence of stratus clouds and a dying wind will usually result in（）.
In most cases，the direction of the apparent wind lies between the bow and（）.
In mid-ocean，the characteristics of a wave are determined by three factors. What is NOT one of these factors?（）.
Radiation fog（）.
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)（）.
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（）.
Steam fog is most likely to occur on the Mississippi and Ohio Rivers in（）.
The apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.
In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.