A.crossing
B.transit
C.transfer
D.passing
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A.V-shaped ripple with the point of the V pointing upstream
B.V-shaped ripple with the point of the V pointing downstream
C.small patch of smooth water on a windy day
D.smoothing out of the vessel's wake
A.chute
B.stabilized channel
C.slough
D.navigable pass
A.3 hours
B.6 1/2 hours
C.12 1/2 hours
D.25 hours
A.dew
B.frost
C.glaze
D.snow
A.high density will be on the left in the Northern Hemisphere
B.high density will be on the right in the Southern Hemisphere
C.low density will be on the left in the Northern Hemisphere
D.low density will be on the left in the Southern Hemisphere
最新試題
In the Northern Hemisphere，a wind that shifts counterclockwise is a（）.
The drift and set of tidal，river，and ocean currents refer to the（）.
The currents are（）mosoonal origin．
In mid-ocean，the characteristics of a wave are determined by three factors. What is NOT one of these factors?（）.
The largest waves (heaviest chop) will usually develop where the wind blows（）.
The direction of the surface wind is（）.
Cold water flowing southward through the western part of the Bering Strait between Alaska and Siberia is joined by water circulating counterclockwise in the Bering Sea to form the（）.
In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.
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 apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.