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
The apparent wind can be zero when the true wind is from（）.
Radiation fog（）.
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（）.
The horse latitudes are characterized by（）.
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)（）.
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 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（）.
In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.
In a tropical cyclone，in the Northern Hemisphere，a vessel hove to with the wind shifting counterclockwise is（）.
The apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.