A.warmer，less dense，and less stable
B.cool，more dense，and drier
C.muggy and cloudy
D.extremely moist with high relative humidity
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A.the Canadian Coast Guard
B.Ice Sarnia
C.the Ice Navigation Center
D.the icebreaker assigned to the area
A.coiling
B.faking
C.flemishing
D.thoroughfooting
A.pilot charts
B.Notices to Mariners
C.Tide Tables
D.Current Tables
A.are sheet or layer clouds
B.have undergone great vertical development
C.are middle or high altitude clouds
D.are rain clouds
A.as a mass of warm，humid air rises into the atmosphere and cools，condensing moisture into small droplets
B.as winds blow across bodies of water，the sun causes the moisture to be absorbed and move upward forming clouds
C.dry air compresses moisture from the atmosphere into clouds
D.when the relative humidity of the atmosphere is low
最新試題
Channel 13 is primarily used for ship to ship communication. Channel 13 is also authorized for（）.
Concerning a celestial observation，the azimuth angle is measured from the principal vertical circle to the（）.
Clouds with the prefix “nimbo” in their name（）.
Compared to a low pressure system，generally the air in a high is（）.
Chronometer error may be found by（）.
Control of fire should be addressed（）.
Concerning the identification signal for a pilot vessel，in fog，which statement is TRUE?（）
Day-shapes must be displayed（）.
Complete information on weather broadcasts throughout the world is contained in（）.
Consideration should be given in planning for the mooring orientation in a new location so that in adverse weather a crane is available to off-load the supply vessel on what side of the unit?（）