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单选题
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 front
B
tropical cyclone
C
anticyclone
D
cold front
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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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A weather forecast states that the wind will commence backing. In the Northern Hemisphere this would indicate that it will ______.A.shift in a clockwise mannerB.shift in a counterclockwise mannerC.continue blowing from the same directionD.decrease in velocity
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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
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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
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In the Southern Hemisphere winds in a low pressure system rotate in a ______.A.clockwise directionB.northeasterly directionC.northerly directionD.counterclockwise direction
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
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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
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单选题In the Northern Hemisphere，an observer at point II in the weather system should experience a wind shift from the（）.A
Southwest，clockwise to northwestB
Northeast，clockwise to west-southwestC
Northeast，counterclockwise to northwestD
East，counterclockwise to south-southwest
考题
单选题The direction of prevailing winds in the Northern hemisphere is caused by the（）.A
Magnetic field at the North PoleB
Gulf StreamC
Earth's rotationD
Arctic cold fronts
考题
单选题The dangerous semicircle of a hurricane in the Northern Hemisphere is that area of the storm （）.A
to the right of the storm's trackB
measured from true north clockwise to 180°TC
measured from true north counterclockwise to 180°TD
between the ship's heading and the bearing to the eye
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
strong，cyclonic winds that change direction to conform to the passage of an extreme low pressure system
考题
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A weather forecast states that the wind will commence backing. In the Northern Hemisphere，this would indicate that it will（）.A
shift in a clockwise mannerB
shift in a counterclockwise mannerC
continue blowing from the same directionD
decrease in velocity
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
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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 a tropical cyclone，in the Northern Hemisphere，a vessel hove to with the wind shifting counterclockwise is（）.A
ahead of the storm centerB
in the dangerous semicircleC
in the navigable semicircleD
directly in the approach path of the storm
考题
单选题Which condition indicates that you are in a hurricane’s dangerous semicircle in the Northern hemisphere（）.A
A backing windB
A veering windC
A northerD
A strong，gusty wind
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