The first indications a mariner will have of the approach of a warm front will be ______.A.large cumulonimbus (thunderclouds) building upB.high cirrus clouds gradually changing to cirrostratus and then to altostratusC.fog caused by the warm air passing over the cooler waterD.low dark clouds accompanied by intermittent rain
The first indications a mariner will have of the approach of a warm front will be ______.
A.large cumulonimbus (thunderclouds) building up
B.high cirrus clouds gradually changing to cirrostratus and then to altostratus
C.fog caused by the warm air passing over the cooler water
D.low dark clouds accompanied by intermittent rain
相关考题：
Cumulonimbus clouds are most likely to accompany a(n) ______.A.high pressure systemB.cold frontC.warm frontD.occluded front
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
On the approach of a warm front the barometric pressure usually ______.A.fallsB.risesC.is steadyD.is unreliable
In many areas "atoll" clouds (clouds of vertical development) are produced over small islands. These are the result of ______.A.rising air currents produced by the warm islandsB.warm air from the sea rising over higher land areasC.cool land air mixing with warm sea airD.descending air over the islands
Which of the following statements concerning frontal movements is TRUE ________．A.The temperature rises after a cold front passesB.The barometric pressure rises when a warm front passesC.A cold front generally passes faster than a warm frontD.A warm front usually has more violent weather associated with it than a cold front
Cumulus clouds that have undergone vertical development and have become cumulonimbus in form，indicate ______．A.clearing weatherB.that a warm front has passedC.probable thunderstorm activityD.an approaching hurricane or typhoon
A frontal thunderstorm is caused by ______.A.pronounced local heatingB.wind being pushed up a mountainC.a warm air mass rising over a cold air massD.an increased lapse rate caused by advection of warm surface air
Advection fog is most commonly caused by ______.A.air being warmed above the dew pointB.saturation of cold air by rainC.a rapid cooling of the air near the surface of the Earth at nightD.warm moist air being blown over a colder surface
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
Clouds appearing in the following order: cirrus, cirrostratus, altostratus, stratus, and nimbostratus usually indicate the approach of a(n) ______.A.warm frontB.occluded frontC.medium frontD.cold front
Early indications of the approach of a hurricane may be all of the following EXCEPT_____A.short confused swellsB.gradually incresing white clouds (mare’s tails)C.pumping barometerD.continuous fine mist-like rain
单选题Steady precipitation is typical of（）.Acoming cold weather conditionsBa warm front weather conditionChigh pressure conditionsDscattered cumulus clouds
单选题Cirrus clouds followed by cirrostratus then altostratus，stratus，and occasionally nimbostratus indicate the approach of a(n)（）.Acold frontBwarm frontCtropical frontDoccluded front
单选题Clouds appearing in the following order: cirrus，cirrostratus，altostratus，stratus，and nimbostratus usually indicate the approach of a(n)（）.Awarm frontBoccluded frontCmedium frontDcold front
单选题Cumulonimbus clouds are most likely to accompany a(n)（）.Ahigh pressure systemBcold frontCwarm frontDoccluded front
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An occluded front is usually caused by a（）.Acold front becoming stationaryBwarm front becoming stationaryCcold front overtaking a warm frontDwarm front dissipating
单选题Cyclones tend to move（）.Aperpendicular to the isobars in their warm sectorsBparallel to the isobars in their warm sectorsCparallel to the line of the cold frontDperpendicular to the line of the cold front
单选题Cumulonimbus clouds are formed by（）.Avertical air movementsBheavy rainstormsChorizontal air movementsDany movement of moist air
单选题The first indications a mariner will have of the approach of a warm front will be （）.Alarge cumulonimbus (thunderclouds) building upBhigh cirrus clouds gradually changing to cirrostratus and then to altostratusCfog caused by the warm air passing over the cooler waterDlow dark clouds accompanied by intermittent rain
单选题A frontal thunderstorm is caused by（）.Apronounced local heatingBwind being pushed up a mountainCa warm air mass rising over a cold air massDan increased lapse rate caused by advection of warm surface air
单选题Cumulus clouds that have undergone vertical development and have become cumulonimbus in form，indicate（）.Aclearing weatherBthat a warm front has passedCprobable thunderstorm activityDan approaching hurricane or typhoon
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（）is the most widespread type likely to be encountered at sea and is caused by relatively warm air being cooled by flowing over a cooler sea surface.AFRONTAL FOGBMIXING FOGCADVECTION FOGDRADIATION FOG
单选题In many areas atoll clouds (clouds of vertical development) are produced over small islands. These are the result of（）.Arising air currents produced by the warm islandsBwarm air from the sea rising over higher land areasCcool land air mixing with warm sea airDdescending air over the islands
单选题The fog produced by warm moist air passing over a cold surface is called（）.Aconduction fogBradiation fogCfrontal fogDadvection fog
单选题A cloud sequence of cirrus，cirrostratus，and altostratus clouds followed by rain usually signifies the approach of a(n)（）.Aoccluded frontBstationary frontCwarm frontDcold front