航海英语航海气象章节练习(2017.12.12)

单项选择题
In some river mouths and estuaries the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstream，and is called a（）.
A.seiche
B.bore
C.boundary wave
D.surge
单项选择题
High pressure ridge（）from Sevastopol to eastern Libya.
A.reaching
B.extending
C.increasing
D.upgrading
单项选择题
The doldrums are characterized by（）.
A.Steady，light to moderate winds
B.Frequent calms
C.Clear skies
D.Low humidity
单项选择题
In North America the majority of the weather systems move from（）.
A.north to south
B.south to north
C.east to west
D.west to east
单项选择题
A cloud sequence of cirrus，cirrostratus，and altostratus clouds followed by rain usually signifies the approach of a(n)（）.
A.occluded front
B.stationary front
C.warm front
D.cold front
单项选择题
Which of the following is not a wind（）.
A.Growler
B.Norther
C.Levanter
D.Mistral
单项选择题
In mid-ocean，the characteristics of a wave are determined by three factors. What is NOT one of these factors?（）.
A.Effect of the moon's gravity
B.Fetch
C.Wind velocity
D.Length of time a wind has been blowing
单项选择题
Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours.You should（）.
A.Expect to see cirrus clouds followed by altostratus and nimbostratus clouds
B.Alter course to remain in the navigable semicircle
C.Prepare for gusty winds，thunderstorms，and a sudden wind shift
D.Expect clear weather，with steady winds and pressure，until the front passes
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
The apparent wind can be zero when the true wind is from（）.
A.ahead and equal to the ship's speed
B.astern and equal to the ship's speed
C.ahead and equal to twice the ship's speed
D.astern and equal to twice the ship's speed