A.moderate but easily navigated
B.calm
C.mountainous and confused
D.mountainous but fairly regular as far as direction is concerned
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A.high relative humidity
B.frequent showers and thunderstorms
C.steep pressure gradients
D.frequent calms
A.steady，constant winds
B.frequent rain showers and thunderstorms
C.steep pressure gradients
D.low relative humidity
A.high winds
B.high overcast clouds
C.calm or light winds
D.fog or steady rain
A.north to south
B.south to north
C.east to west
D.west to east
A.3 times the depth of water
B.6 times the depth of water
C.10 times the depth of water
D.15 times the depth of water
最新試題
Two well-developed high pressure areas may be separated by a（）.
The passing of a low pressure system can be determined by periodically checking the（）.
Which condition suggests that your present position lies in the navigable semicircle of a tropical storm（）.
What kind of conditions would you observe as the eye of a storm passes over your ship’s position（）.
When your vessel is on or near the path of an approaching tropical storm the（）.
Wen a hurricane passes over colder water or land and loses its tropical characteristics，the storm becomes a（n）（）.
The southeast trade winds actually blow toward the（）.
Monsoons are characterized by（）.
Tropical cyclones are classified by form and intensity.Which system does not have closed isobars（）.
In the Southern Hemisphere winds in a low pressure system rotate in a（）.