A.apogean tide
B.double high water
C.perigean tide
D.bore
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A.rollers
B.breakers
C.white caps
D.surfers
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
最新試題
Ocean currents are well defined and（）.
The apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.
In the Northern Hemisphere the major ocean currents tend to flow（）.
The direction of the southeast trade winds is a result of the（）.
In a tropical cyclone，in the Northern Hemisphere，a vessel hove to with the wind shifting counterclockwise is（）.
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（）.
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 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（）.
In some river mouths and estuaries the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstream，and is called a（）.
On the pole side of the trade wind belt，there is an area of high pressure with weak pressure gradients and light，variable winds. This area is called the（）.