As a cold front passes an observer, pressure ______.A.drops and winds become variableB.rises and winds become gustyC.drops and winds become gustyD.rises and winds become variable
As a cold front passes an observer, pressure ______.
A.drops and winds become variable
B.rises and winds become gusty
C.drops and winds become gusty
D.rises and winds become variable
相关考题：
Cumulonimbus clouds are most likely to accompany a(n) ______.A.high pressure systemB.cold frontC.warm frontD.occluded front
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
Steam smoke will occur when ______.A.extremely cold air from shore passes over warmer waterB.warm dry air from shore passes over cooler waterC.cold ocean water evaporates into warm airD.cool rain passes through a warm air mass
A generally circular low pressure area is called a(n)______．A.cycloneB.anticycloneC.cold frontD.occluded front
After a cold front passes the barometric pressure usually ______.A.fluctuatesB.remains the sameC.remains the same, with clouds forming rapidlyD.rises, often quite rapidly, with clearing skies
After a cold front passes，the barometric pressure______．A.drops，and the temperature dropsB.drops ， and the temperature risesC.rises，and the temperature dropsD.rises，and the temperature rises
An occluded front is caused by a(n) ______.A.low pressure areaB.high pressure areaC.area of calm airD.cold front overtaking a warm front
Brief, violent showers frequently accompanied by thunder and lightning are usually associated with ______.A.passage of a warm frontB.winds shifting counterclockwise in the Northern HemisphereC.stationary high pressure systemsD.passage of a cold front
Cumulonimbus clouds can produce ______.A.dense fog and high humidityB.gusty winds, thunder, rain or hail, and lightingC.clear skies with the approach of a cold frontD.a rapid drop in barometric pressure followed by darkness
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
单选题Steady precipitation is typical of（）.Acoming cold weather conditionsBa warm front weather conditionChigh pressure conditionsDscattered cumulus clouds
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)（） .Awarm frontBtropical cycloneCanticycloneDcold front
单选题Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours.You should（）.AExpect to see cirrus clouds followed by altostratus and nimbostratus cloudsBAlter course to remain in the navigable semicircleCPrepare for gusty winds，thunderstorms，and a sudden wind shiftDExpect clear weather，with steady winds and pressure，until the front passes
单选题Monsoons are characterized by （）.Alight，variable winds with little or no humidityBstrong，gusty winds that blow from the same general direction all yearCsteady winds that reverse direction semiannuallyDstrong，cyclonic winds that change direction to conform to the passage of an extreme low pressure system
单选题An occluded front is caused by a(n)（）.Alow pressure areaBhigh pressure areaCarea of calm airDcold front overtaking a warm front
单选题Cumulonimbus clouds can produce（）.Adense fog and high humidityBgusty winds，thunder，rain or hail，and lightningCclear skies with the approach of a cold frontDa rapid drop in barometric pressure followed by darkness
单选题The height of a tide can be increased by（）.AA storm surgeBA high pressure areaCThe jet streamDA cold front
单选题In the Northern Hemisphere，winds veering sharply to the west or northwest with increasing speed are indications that a（）.Acold front has passedBlow pressure center is approachingCstationary front existsDhigh pressure center has passed
单选题A series of brief showers accompanied by strong，shifting winds may occur along or some distance ahead of a(n)（）.Aupper front aloftBcycloneCoccluded frontDcold front
单选题Cyclones that have warm sectors usually move（）.AwesterlyBparallel to the isobars in the warm sectorCtoward the nearest high pressure areaDfaster than the accompanying cold front
单选题Steam smoke will occur when（）.Aextremely cold air from shore passes over warmer waterBwarm dry air from shore passes over cooler waterCcold ocean water evaporates into warm airDcool rain passes through a warm air mass
单选题As a cold front passes an observer，pressure（）.Adrops and winds become variableBrises and winds become gustyCdrops and winds become gustyDrises and winds become variable
单选题Which of the following statements concerning frontal movements is TRUE（）.AThe temperature rises after a cold front passesBThe barometric pressure rises when a warm front passesCA cold front generally passes faster than a warm frontDA warm front usually has more violent weather associated with it than a cold front
单选题If an observer in the Northern Hemisphere faces the surface wind，the center of low pressure is to his（）.Aleft，slightly behind himBright，slightly behind himCleft，slightly in front of himDright，slightly in front of him
单选题What kind of conditions would you observe as the eye of a storm passes over your ship’s position（）.AHuge waves approaching from all directions，clearing skies，light winds，and an extremely low barometerBFlat calm seas，heavy rain，light winds，and an extremely low barometerCFlat calm seas，heavy rain，light winds，and high pressureDHuge waves approaching from all directions，clearing skies，light winds，and high pressure
单选题After a cold front passes the barometric pressure usually（）.AfluctuatesBremains the sameCremains the same，with clouds forming rapidlyDrises，often quite rapidly，with clearing skies
单选题After a cold front passes，the barometric pressure（）.Adrops，and the temperature dropsBdrops，and the temperature risesCrises，and the temperature dropsDrises，and the temperature rises