航海英语海上天气现象章节练习(2017.12.28)

单项选择题
Most high pressure areas are accompanied by（）.
A.precipitation
B.clear，cool weather
C.humid，sticky weather
D.cool fogs
单项选择题
In the relatively calm area near the hurricane center，the seas are（）.
A.moderate but easily navigated
B.calm
C.mountainous and confused
D.mountainous but fairly regular as far as direction is concerned
单项选择题
Hurricane warnings are issued（）when winds of force 12 or above are expected.
A.in all parts of the world
B.in some parts of the world
C.from all corners of the world
D.from every corner of the world
单项选择题
Wen a hurricane passes over colder water or land and loses its tropical characteristics，the storm becomes a（n）（）.
A.High pressure area
B.Extratropical low-pressure system
C.Tropical storm
D.Easterly wave
单项选择题
Fetch is the（）.
A.distance a wave travels between formation and decay
B.stretch of water over which a wave-forming wind blows
C.time in seconds required for two crests to pass a given point
D.measurement of a wave's steepness
单项选择题
In the Northern Hemisphere，an observer at point II in the weather system should experience a wind shift from the（）.
A.Southwest，clockwise to northwest
B.Northeast，clockwise to west-southwest
C.Northeast，counterclockwise to northwest
D.East，counterclockwise to south-southwest
单项选择题
Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at（）.
A.a specific barometric pressure
B.a specific temperature
C.a specific wind speed
D.any time
单项选择题
The passing of a low pressure system can be determined by periodically checking the（）.
A.Thermometer
B.Hygrometer
C.Barometer
D.Anemometer
单项选择题
What kind of conditions would you observe as the eye of a storm passes over your ship’s position（）.
A.Huge waves approaching from all directions，clearing skies，light winds，and an extremely low barometer
B.Flat calm seas，heavy rain，light winds，and an extremely low barometer
C.Flat calm seas，heavy rain，light winds，and high pressure
D.Huge waves approaching from all directions，clearing skies，light winds，and high pressure
单项选择题
In the doldrums you can expect（）.
A.steady，constant winds
B.frequent rain showers and thunderstorms
C.steep pressure gradients
D.low relative humidity