更多"Cumulonimbus clouds are formed by（）"的相关试题:
[单项选择]Cumulonimbus clouds are formed by（）.
A. vertical air movements
B. heavy rainstorms
C. horizontal air movements
D. any movement of moist air
[单项选择]The dense black cumulonimbus clouds surrounding the eye of a hurricane are called（）.
A. Spiral rainbands
B. Cloud walls
C. Funnel clouds
D. Cyclonic spirals
[单项选择]Cumulonimbus clouds can produce（）.
A. dense fog and high humidity
B. gusty winds，thunder，rain or hail，and lightning
C. clear skies with the approach of a cold front
D. a rapid drop in barometric pressure followed by darkness
[单项选择]Cumulonimbus clouds are most likely to accompany a(n)（）.
A. high pressure system
B. cold front
C. warm front
D. occluded front
[单项选择]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 islands
B. warm air from the sea rising over higher land areas
C. cool land air mixing with warm sea air
D. descending air over the islands
[单项选择]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 islands
B. warm air from the sea rising over higher land areas
C. cool land air mixing with warm sea air
D. descending air over the islands
[单项选择]Cumulus clouds that have undergone vertical development and have become cumulonimbus in form，indicate（）.
A. clearing weather
B. that a warm front has passed
C. probable thunderstorm activity
D. an approaching hurricane or typhoon
[单项选择]Clouds form（）.
A. as a mass of warm，humid air rises into the atmosphere and cools，condensing moisture into small droplets
B. as winds blow across bodies of water，the sun causes the moisture to be absorbed and move upward forming clouds
C. dry air compresses moisture from the atmosphere into clouds
D. when the relative humidity of the atmosphere is low
[单项选择]Altocumulus clouds are defined as（）.
A. high clouds
B. middle clouds
C. low clouds
D. vertical development clouds
[单项选择]Cirrus clouds are composed primarily of（）.
A. ice crystals
B. water droplets
C. snow crystals
D. nitrogen
[单项选择]Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are（）.
A. cirrus
B. cirrostratus
C. altostratus
D. cirrocumulus
[单项选择]The presence of stratus clouds and a dying wind will usually result in（）.
A. heavy rain
B. heavy snow
C. thick fog
D. clearing skies
[单项选择]Cirrus clouds followed by cirrostratus then altostratus，stratus，and occasionally nimbostratus indicate the approach of a(n)（）.
A. cold front
B. warm front
C. tropical front
D. occluded front
[单项选择]A line of clouds，sharp changes in wind direction，and squalls are most frequently associated with a(n)（）.
A. occluded front
B. warm front
C. cold front
D. warm sector
[单项选择]The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the （）
A. flash point
B. fire point
C. upper explosive limit
D. lower explosive limit
[单项选择]A line of position formed by sighting two charted objects in line is called a(n)（）.
A. relative bearing
B. range line
C. track line
D. estimated position
[单项选择]Clouds with the prefix “nimbo” in their name（）.
A. are sheet or layer clouds
B. have undergone great vertical development
C. are middle or high altitude clouds
D. are rain clouds
[单项选择]Clouds are classified according to their（）.
A. size
B. moisture content
C. altitude and how they were formed
D. location in a front
