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
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If you agree to have this operation, _________ are that you may recover sooner. A. chancesB. occasionsC. casesD. indications
Cumulonimbus clouds are most likely to accompany a(n) ______.A.high pressure systemB.cold frontC.warm frontD.occluded front
Fog is most commonly associated with a(n) ______.A.warm front at nightB.low pressure areaC.anticycloneD.lack of frontal activity
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
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
Cyclones tend to move ______.A.perpendicular to the isobars in their warm sectorsB.parallel to the isobars in their warm sectorsC.parallel to the line of the cold frontD.perpendicular to the line of the 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
Mother's Day is thought to __________in the 19lOs, isn't it?A．first markB．be first markedC．have first markedD．have first been marked
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The scientific approach to a problem consists first of all _____ collecting ample material.AwithBofCinDto
单选题As it approaches，a typical warm front will bring（）.Arising temperatures and falling barometric pressureBfalling temperature and pressureCfalling temperatures and rising pressureDrising barometric pressure and temperatures
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An occluded front is caused by a(n)（）.Alow pressure areaBhigh pressure areaCarea of calm airDcold front overtaking a warm front
单选题On the approach of a warm front the barometric pressure usually（）.AfallsBrisesCis steadyDis unreliable
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Which of the following statements is TRUE?APeople with seat belts tied will always be safe in cars.BVolvo was the first carmaker to use seat belts in cars.CAir bags will come out before the cars hit something.DAll cars have air bags in front of the seats.
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You discover that your Recycle Bin contains two tables with the same name, MY_TABLE. You also have a table named MY_TABLE in your schema.You execute the following statement: FLASHBACK TABLE my_table TO BEFORE DROP RENAME TO my_table2; What will be the result of executing this statement?（）AOne of the tables is recovered from the Recycle Bin using a First In First Out (FIFO) approach.BOne of the tables is recovered from the Recycle Bin using a Last In First Out (LIFO) approach.CBoth the tables are recovered from the Recycle Bin with one table renamed to MY_TABLE2 and the other to a system-generated name.DNone of the tables are recovered from the Recycle Bin, and the statement returns an error.
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