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单选题
The direction of prevailing winds in the Northern hemisphere is caused by the（）.
A
Magnetic field at the North Pole
B
Gulf Stream
C
Earth's rotation
D
Arctic cold fronts
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Monsoons are characterized by ______.A.light，variable winds with little or no humidityB.strong，gusty winds that blow from the same general direction all yearC.steady winds that reverse direction semiannuallyD.strong，cyclonic winds that change direction to conform to the passage of an extreme low pressure system
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When a high pressure system is centered north of your vessel in the Northern Hemisphere ______．A.You should experience hot，moist，clear weatherB.The wind direction is generally easterlyC.The winds should be from the southwest at your locationD.The winds should be brisk
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The horse latitudes are characterized by ______．A.weak pressure gradients and light，variable windsB.the formation of typhoons or hurricanes in certain seasonsC.steady winds in one direction for six months followed by wind reversal for the next six monthsD.steady winds generally from the southeast in the Southern Hemisphere
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If the center of low pressure is due west of you in the Northern Hemisphere, which wind direction should you expect?A.South to westB.South to eastC.West to northD.North to east
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If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere?______.A.East to northeastB.East to southeastC.North to northwestD.South to southeast
考题
In the Northern Hemisphere a wind is said to veer when the wind ______.A.changes direction clockwise, as from north to east, etcB.changes direction counterclockwise, as from south to east, etcC.changes direction violently and erraticallyD.remains constant in direction and speed
考题
In the Northern Hemisphere, gusty winds shifting clockwise, a rapid drop in temperature, thunderstorms or rain squalls in summer ( frequent rain / snow squalls in winter ) then a rise in pressure followed by clearing skies, indicate the passage of a(n) ______.A.warm frontB.tropical cycloneC.anticycloneD.cold front
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In the Northern Hemisphere, when the center of a high pressure system is due east of your position, you can expect winds from the ______.A.south to eastB.north to westC.north to eastD.south to west
考题
In the Southern Hemisphere winds in a low pressure system rotate in a ______.A.clockwise directionB.northeasterly directionC.northerly directionD.counterclockwise direction
考题
In the Northern Hemisphere, if the center of a high pressure area is due west of you, what wind direction would you expect?______.A.South to westB.South to eastC.North to westD.North to east
考题
单选题The horse latitudes are characterized by（）.A
weak pressure gradients and light，variable windsB
the formation of typhoons or hurricanes in certain seasonsC
steady winds in one direction for six months followed by wind reversal for the next six monthsD
steady winds generally from the southeast in the Southern Hemisphere
考题
单选题In the Northern hemisphere northerly winds may cause temperature（）.A
fallingB
risingC
constantD
same
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单选题A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing，the water of（）.A
high density will be on the left in the Northern HemisphereB
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low density will be on the left in the Northern HemisphereD
low density will be on the left in the Southern Hemisphere
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单选题Generally speaking，in the Northern Hemisphere，when winds are blowing from between SE and SW the barometric reading（）.A
makes no change at allB
is somewhat lower than it would be for winds from a northern quadrantC
is uncertain and may fluctuate by increasing and decreasingD
is somewhat higher than it would be for winds from the northern quadrant
考题
单选题Monsoons are characterized by （）.A
light，variable winds with little or no humidityB
strong，gusty winds that blow from the same general direction all yearC
steady winds that reverse direction semiannuallyD
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单选题What is the direction of rotation of tropical cyclones,tropical storms and hurricanes in the Northern Hemisphere?（）A
Clockwise and outwardB
Counterclockwise and inwardC
Counterclockwise and outwardD
Clockwise and inward
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单选题When a high pressure system is centered north of your vessel in the Northern Hemisphere（）.A
You should experience hot，moist，clear weatherB
The wind direction is generally easterlyC
The winds should be from the southwest at your locationD
The winds should be brisk
考题
单选题In the Northern Hemisphere a wind is said to veer when the wind（）.A
Changes direction clockwise，as from north to east，etcB
Changes direction violently and erraticallyC
Remains constant in direction and speedD
Changes direction counterclockwise，as from south to east，etc
考题
单选题In the Northern Hemisphere，winds veering sharply to the west or northwest with increasing speed are indications that a（）.A
cold front has passedB
low pressure center is approachingC
stationary front existsD
high pressure center has passed
考题
单选题The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.A
Pressure gradientB
Coriolis effectC
Aurora borealisD
Ballistic deflection
考题
单选题If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position，what winds can you expect in the Northern Hemisphere?（）.A
East to northeastB
East to southeastC
North to northwestD
South to southeast
考题
单选题What will a veering wind do（）.A
Change direction in a clockwise manner in the Northern HemisphereB
Circulate about a low pressure center in a counterclockwise manner in the Northern HemisphereC
Vary in strength constantly and unpredictablyD
Circulate about a high pressure center in a clockwise manner in the Southern Hemisphere
考题
单选题In the Northern Hemisphere，the right half of the storm is known as the dangerous semicircle because（）.A
the wind speed is greater here since the wind is traveling in the same general direction as the storm's trackB
the direction of the wind and seas might carry a vessel into the path of the stormC
the seas are higher because of greater wind speedD
All of the above
考题
单选题Hurricanes may move in any direction．However，it is rare and generally of short duration when a hurricane in the Northern Hemisphere moves toward the（）.A
West or northwestB
NortheastC
SoutheastD
North
考题
单选题In the Southern Hemisphere winds in a low pressure system rotate in a（）.A
clockwise directionB
northeasterly directionC
northerly directionD
counterclockwise direction
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