A.spring，around late evening
B.spring，around early evening
C.fall，around early morning
D.fall，around midday
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A.always forms over water
B.is formed by a temperature inversion
C.is thinnest at the surface
D.dissipates during the evening
A.prevailing westerlies
B.geostrophic winds
C.doldrums
D.horse latitudes
A.create large waves in the direction of the current
B.change direction 360°during a 24 hour period
C.remain fairly constant in direction and velocity throughout the year
D.are characterized by a light green color
A.permanent waves
B.tidal waves
C.tropical waves
D.tropical storms
A.starboard bow，note the course，and head in that direction
B.starboard quarter，note the course，and head in that direction
C.port quarter，note the course，and head in that direction
D.port bow，note the course，and head in that direction
最新試題
Steam fog is most likely to occur on the Mississippi and Ohio Rivers in（）.
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（）.
The drift and set of tidal，river，and ocean currents refer to the（）.
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 place where a channel moves from along one bank of the river over to the other bank of the river is called a（）.
The currents are（）mosoonal origin．
In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.
Radiation fog（）.
In the Northern Hemisphere the major ocean currents tend to flow（）.
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（）.