A.rollers
B.breakers
C.white caps
D.surfers
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A.the direction of the true wind
B.true north
C.the beam on the windward side
D.the beam on the lee side
A.transmitter
B.transducer
C.transceiver
D.amplifier
A.Effect of the moon's gravity
B.Fetch
C.Wind velocity
D.Length of time a wind has been blowing
A.ahead of the storm center
B.in the dangerous semicircle
C.in the navigable semicircle
D.directly in the approach path of the storm
A.Alaska Current
B.Subarctic Current
C.Kuroshio Current
D.Oyashio Current
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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 apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.
In mid-ocean，the characteristics of a wave are determined by three factors. What is NOT one of these factors?（）.
In the Northern Hemisphere，a wind that shifts counterclockwise is a（）.
The length of a wave is the length（）.
The apparent wind can be zero when the true wind is from（）.
The height of a wave is the vertical distance（）.
In the Northern Hemisphere the major ocean currents tend to flow（）.
The cold ocean current which meets the warm Gulf Stream between latitudes 40°and 43°N to form the cold wall is called the（）.
Advection fog holds longest over which portions of the lakes?（）