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
Chart legends printed in capital letters show that the associated landmark is（）.
Class I and II private aids to navigation in or along navigable waters of the United States are listed in the（）.
Daylight savings time is a form of zone time that adopts the time（）.
Coast Pilots and navigational charts are kept corrected and up-to-date by using the（）.
Deficient oxygen content inside a chain locker can be detected with（）.
Channel 13 is primarily used for ship to ship communication. Channel 13 is also authorized for（）.
Corrosive liquids and acids should have which kind of label?（）
Cumulus clouds that have undergone vertical development and have become cumulonimbus in form，indicate（）.
Coiling new rope against the lay，bringing the lower end up through the center of the coil，then coiling with the lay，in order to remove the kinks，is known as（）.
Concerning a celestial observation，the azimuth angle is measured from the principal vertical circle to the（）.