A.Tehuan tepecer
B.Papagayo
C.Norther
D.Pampero
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A.crossing
B.transit
C.transfer
D.passing
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
最新試題
In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.
The apparent wind can be zero when the true wind is from（）.
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（）.
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（）.
In the Northern Hemisphere，your vessel is believed to be in the direct path of a hurricane，and plenty of sea room is 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（）.
In most cases，the direction of the apparent wind lies between the bow and（）.
The ocean bottom that extends from the shoreline out to an area where there is a marked change in slope to a greater depth is the（）.
The height of a wave is the vertical distance（）.