A source of an air mass labeled mTw is ______.A.the equatorB.the Gulf of MexicoC.AlaskaD.Canada
A source of an air mass labeled mTw is ______.
A.the equator
B.the Gulf of Mexico
C.Alaska
D.Canada
相关考题：
()on a ship transmits power from the engine to the propeller. A.The automatic control systemB.The speed regularly systemC.The transmission systemD.The compression air system
Temperature and moisture characteristics are modified in a warm or cold air mass due to ______.A.pressure changes in the air massB.movement of the air massC.the heterogeneous nature of the air massD.upper level atmospheric changes
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
Sweat damage will occur in a cargo hold containing machinery parts when ______.A.the outside air is colder than the cargo．B.the air temperature of the hold is higher than the outside air temperature．C.the dew point of the hold is higher than the temperature of the cargo．D.the dew point of the outside air is lower than the temperature of the cargo
Air temperature varies with ______.A.the altitude above sea levelB.the season of the yearC.the latitude or distance from the equatorD.All of the above
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
A warm air mass is characterized by______．A.stabilityB.instabilityC.gusty windsD.good visibility
After putting on a self-contained breathing apparatus, you open the air supply and hear a continuous ringing of a bell. What does this mean?______.A.The unit is working properlyB.The face mask is not sealed properlyC.The air bottle needs to be refilledD.The air supply hose has a leak
As the temperature for an air mass decreases, the ______.A.absolute humidity increasesB.relative humidity increasesC.specific humidity increasesD.dew point rises
According to the passage, what is one disadvantage of skyscrapers that have mirroredwalls?__________A.The exterior surrounding air is heatedB.The building materials are very expensiveC.Construction time is increasedD.Extra air-conditioning equipment is needed
A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week according to the National Weather Service.According to the NWS a mass of cold air will drop from the Arctic regions to Canada and then the upper Midwest next week.Temperatures across the Midwest will drop into the 60s and 70s-a sharp difference from the 80 degree and 90 degree temperatures from recent weeks. And the relatively cooler air may be felt as far East as New York and WashingtonThe cool breezes may be a welcome relief this time around but remember the last few times we got hit with Arctic air？Temperatures in cities including Chicago Cleveland New York and Louisville fell into single-digit and negative territory for long stretches during the harsh winter months of early 2014. But we’re sure you rememberAccording to the National Weather Service____A. the cool mass of air originates from CanadaB. a mass of cold air will affect both Canada and the U.SC. the chilly weather is back to the globeD. only the upper Midwest will be affected by the cool air
资料：We never thought we'd say this, but we'd welcome back some chilly weather.A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week, according to the National Weather Service.According to the NWS, a mass of cold air will drop from the Arctic regions to Canada and then the upper Midwest next week.Temperatures across the Midwest will drop into the 60s and 70s—a sharp difference from the 80 degree and 90 degree temperatures from recent weeks. And the relatively cooler air may be felt as far East as New York and Washington.The cool breezes may be a welcome relief this time around, but remember the last few times we got hit with Arctic air?Temperatures in cities including Chicago, Cleveland, New York, and Louisville fell into single-digit and negative territory for long stretches during the harsh winter months of early 2014. But we're sure you remember.According to the National Weather Service, ___.A.the cool mass of air originates from CanadaB.a mass of cold air will affect both Canada and the U.S.C.the chilly weather is back to the globeD.only the upper Midwest will be affected by the cool air
The great source of modification of the air stream is found in the（）cavity.AnasalBoralClungDglottis
After a server has been installed into a rack, an administrator must ensure which of the following?（）A、Warm air flow is permitted through the front bezelB、The system is labeled so that it can be identifiedC、Verify the change control process can be implementedD、Determine the correct power requirements
单选题When crossing a front,isobars tend to（）.Achange from smooth curves within the air mass to sharp bends at the frontBchange from sharp bends within the air mass to smooth curves at the frontCpass smoothly across the front with no changeDbecome closer together at the front and pass through in straight lines
单选题After a server has been installed into a rack， an administrator must ensure which of the following？（）AWarm air flow is permitted through the front bezelBThe system is labeled so that it can be identifiedCVerify the change control process can be implementedDDetermine the correct power requirements
单选题Temperature and moisture characteristics are modified in a warm or cold air mass due to （）.Apressure changes in the air massBmovement of the air massCthe heterogeneous nature of the air massDupper level atmospheric changes
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Increased air （） will raise scavenge efficiency and allow a greater mass of air to be compressed； more fuel may now be burned giving an increased power.Aspecific volumeBdensityCviscosityDcalorific value
单选题As the temperature of an air mass decreases，the（）.Aabsolute humidity decreasesBrelative humidity increasesCspecific humidity decreasesDdew point rises
单选题The greater the pressure difference between a high and a low pressure center，the（）.Adryer the air mass will beBcooler the temperature will beCgreater the force of the wind will beDwarmer the temperature will be
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The great source of modification of the air stream is found in the（）cavity.AnasalBoralClungDglottis
单选题Foam extinguishes a fire by（）.Ashutting off the air supplyBcooling the fuel to below ignition temperatureCdispersing the fuelDremoving the source of ignition
单选题As the temperature for a given mass of air increases，the（）.Adew point increasesBdew point decreasesCrelative humidity increasesDrelative humidity decreases