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
Clouds appearing in the following order: cirrus, cirrostratus, altostratus, stratus, and nimbostratus usually indicate the approach of a(n) ______.
A.warm front
B.occluded front
C.medium front
D.cold front
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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（）indicates unstable weather.AThe persence of cirrus cloudsBThe low-hanging stratus cloudsCThe altocumulus cloudsDThe massive cumulus clouds
单选题Cirrus clouds are composed primarily of（）.Aice crystalsBwater dropletsCsnow crystalsDnitrogen
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A user reports that it takes a long time to boot up in Windows XP and that there are a lot of icons appearing in the right lower side of the Task Bar. Which of the following tools can be used to minimize startup time？ （）AMSCONFIGBSCANDISKCDEBUGDDEFRAG
单选题In order to ensure best read performance， which of the following indicates how large an application’s read buffer size should be if the filesystem to be read is striped across N disks using LVM striping？（）A N times the stripe unit sizeB N times the VMM minfree parameterC The same value as that of the VMM maxfree parameterD The same value as that of the VMM maxrndwrt parameter
单选题A cold front moving in from the northwest can produce（）.Athunderstorms，hail，and then rapid clearingBincreasing cloud cover lasting for several daysClengthy wet weatherDlow ceilings with thick cirrus 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（）may be a warning for an approaching storm.AThe persence of cirrus cloudsBThe low-hanging stratus cloudsCThe altocumulus cloudsDThe massive cumulus clouds
单选题All of the following are associated with cumulonimbus clouds EXCEPT（）.Asteady rainfallBhail stormsCthunderstormsDtornadoes or waterspouts
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The presence of stratus clouds and a dying wind will usually result in（）.Aheavy rainBheavy snowCthick fogDclearing skies
单选题In the Northern Hemisphere，what type of cloud formations would you expect to see to the west of an approaching tropical wave?（）.ACumulus clouds lined up in rows extending in a northeast to southwest directionBHigh altostratus clouds in the morning hoursCCirrostratus clouds lined up in rows extending in a northeast to southwest directionDCirrostratus clouds lined up in rows extending in a north to south direction
单选题Early indications of the approach of a hurricane may be all of the following EXCEPT（）.Ashort confused swellsBgradually increasing white clouds (mare's tails)Cpumping barometerDcontinuous fine mist-like rain
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
单选题Snow has obliterated surface features and the sky is covered with uniform，altostratus clouds. There are no shadows and the horizon has disappeared. What is this condition called? （）AIce blinkBWhiteoutCWater skyDAurora reflection