______ is the most common cause of ice formation．A.The freezing of raindrops on contact with the vessel's structureB.Drastic fall in ambient temperatureC.The deposit of water droplets on the vessel's structureD.Snowfall
______ is the most common cause of ice formation．
A.The freezing of raindrops on contact with the vessel's structure
B.Drastic fall in ambient temperature
C.The deposit of water droplets on the vessel's structure
D.Snowfall
相关考题：
●The error messages given by a C compiler show the message text,the most common cause of the error,and a suggestion for (73) the error.(73) A．upfsyingB．fixingC．changingD．Editing
The underlined words “tipping points” most probably refer toA. freezing points B. burning points C. melting points D. boiling points
The type of installation “________” is selected by most users, the sof1be installed with the most common options.A.TypicalB.CompleteC.CustomD.Minimum
Radio, telephone and press ____ of conveying news and information. A.are the most three common meansB.are the most common three meansC.are the three most common meansD.are three the most common means
The error messages given by a C compiler show the message text, the most common cause of the error, and a suggestion for(73)the error.A．updatingB．fixingC．changingD．Editing
The type of installation“(71)”is selected by most users, the software installed with the most common options.A．TypicalB．CompleteC．CustomD．Minimum
A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is known as ______.A.sleetB.hailC.freezing rainD.rime
共用题干Rainmaking1 The idea of rainmaking is almost as old as man,but it was not until 1946 that man succeeded in making rain.In ancient times,rainmakers had claimed to bring rain by many methods:dancing.singing-Kiiiing animals t including humans).2 For a long time,men have understood where rain comes from.Water from the surface of oceans and lakes becomes part of the air,where it forms clouds from which rain falls.But exactly what starts the formation of raindrops was not known until quite recently.A man named John Aitken proved that drops of water gather around tiny bits of dust or other matter.The centers of the drops are so small that the human eye cannot see them.Without such centers,it seems raindrops do not form.3 During World War Ⅱ,Dr.Irving Langmir,and his assistant Schaefer,were hired by the General Electric Company to study how and why ice forms on the wings of airplanes.They went to a mountain in New Hampshire,where snowstorms are common and cold winds blow.They were surprised to find that often the temperature of the clouds surrounding them was far below the freezing point,and yet ice did not form in the clouds.4 After the War,Schaefer experimented with a machine that created cold,moist air similar to the air found in clouds.To imitate the moist air of a cloud,Schaefer would breathe into the machine.Then he would drop into the freezer a bit of powder,sugar,or some other substance.For weeks and months he tried everything he could imagine.Nothing happened.No crystals of ice were formed.None of the substances would serve as the center of a snow crystal or raindrops.5 One July morning,Schaefer was dropping in bits of various substances and watching the unsuccessful results.Finally,a friend suggested that they go to eat lunch and Schaefer went with him.As usual,he left the cover of the freezer up,since cold air sinks and would not escape from the box.6 Returning from lunch,Schaefer found that the temperature of the freezer had risen to a point higher than that required for ice crystals to remain solid.There were two choices now.He could close the cover and wait for the freezer itself to lower the air temperature,or he could make the process occur faster by adding dry ice-a gas in solid form that is very,very cold.He chose the latter plan.As he dropped the steaming white dry ice into the freezer,he happened to breathe out a large amount of air.And there,before his eyes,it happened!He had made ice crystals,not by adding centers to the moisture,but by cooling the breath so much that the liquid had to form crystals!Then he began to blow his breath into the freezer and drop large pieces of dry ice through it to create crystals which became a tiny snowstorm falling slowly to the floor of his laboratory.7 After planning carefully,Schaefer made an experiment by dropping dry ice from his plane to the clouds below him.As was expected,snow formed and fell from the bottom of the cloud.Schaefer succeeded.He made history.Paragraph 2______A:Langmir and Schaefer's Work for the GE CompanyB:Langmir and Schaefer's Discovery of Rain-formingC:Men's Knowledge of Rain-formingD:Schaefer's Several Unsuccessful ExperimentsE:Schaefer's Discovery by AccidentF:Langmir and Schaefer's Successful Cooneration
共用题干Rainmaking1 The idea of rainmaking is almost as old as man,but it was not until 1946 that man succeeded in making rain.In ancient times,rainmakers had claimed to bring rain by many methods:dancing,singing,killing animals(including humans).2 For a long time,men have understood where rain comes from.Water from the surface of oceans and lakes becomes part of the air,where it forms clouds from which rain falls.But exactly what starts the forma- tion of raindrops was not known until quite recently.A man named John Aitken proved that drops of water gather around tiny bits of dust or other matter. The centers of the drops are so small that the human eye can- not see them.Without such centers,it seems raindrops do not form.3 During World War Ⅱ,Dr. Irving Langmir,and his assistant Schaefer,were hired by the General Electric Company to study how and why ice forms on the wings of airplanes.They went to a mountain in New Hampshire,where snowstorms are common and cold winds blow. They were surprised to find that often the temperature of the clouds surrounding them was far below the freezing point,and yet ice did not form in the clouds.4 After the War,Schaefer experimented with a machine that created cold,moist air similar to the air found in clouds.To imitate the moist air of a cloud.Schaefer would breathe into the machine.Then he would drop into the freezer a bit of powder,sugar,or some other substance.For weeks and months he tried everything he could imagine.Nothing happened.No crystals of ice were formed.None of the substances would serve as the center of a snow crystal or raindrops.5 One July morning,Schaefer was dropping in bits of various substances and watching the unsuccessful results.Finally,a friend suggested that they go to eat lunch and Schaefer went with him.As usual,he left the cover of the freezer up,since cold air sinks and would not escape from the box.6 Returning from lunch,Schaefer found that the temperature of the freezer had risen to a point higher than that required for ice crystals to remain solid.There were two choices now.He could close the cover and wait for the freezer itself to lower the air temperature,or he could make the process occur faster by adding dry ice a gas in solid form that is very,very cold.He chose the latter plan.As he dropped the steaming white dry ice into the freezer,he happened to breathe out a large amount of air. And there,before his eyes,it happened ! He had made ice crystals,not by adding centers to the moisture,but by cooling the breath so much that the liquid had to form crystals!Then he began to blow his breath into the freezer and drop large pieces of dry ice through it to create crystals which became a tiny snowstorm falling slowly to the floor of his laboratory.7 After planning carefully,Schaefer made an experiment by dropping dry ice from his plane to the clouds below him.As was expected,snow formed and fell from the bottom of the cloud.Schaefer succeeded. He made history.Paragraph 6__________A:Langmir and Schaefer's Work for the GE CompanyB:Langmir and Schaefer's Discovery of Rain-formingC:Men'S Knowledge of Rain-formingD:Schaefer'S Several Unsuccessful Experiments E:Schaefer's Discovery by AccidentF: Langmir and Schaefer'S Successful Cooperation
共用题干Rainmaking1 The idea of rainmaking is almost as old as man,but it was not until 1946 that man succeeded in making rain.In ancient times,rainmakers had claimed to bring rain by many methods:dancing.singing-Kiiiing animals t including humans).2 For a long time,men have understood where rain comes from.Water from the surface of oceans and lakes becomes part of the air,where it forms clouds from which rain falls.But exactly what starts the formation of raindrops was not known until quite recently.A man named John Aitken proved that drops of water gather around tiny bits of dust or other matter.The centers of the drops are so small that the human eye cannot see them.Without such centers,it seems raindrops do not form.3 During World War Ⅱ,Dr.Irving Langmir,and his assistant Schaefer,were hired by the General Electric Company to study how and why ice forms on the wings of airplanes.They went to a mountain in New Hampshire,where snowstorms are common and cold winds blow.They were surprised to find that often the temperature of the clouds surrounding them was far below the freezing point,and yet ice did not form in the clouds.4 After the War,Schaefer experimented with a machine that created cold,moist air similar to the air found in clouds.To imitate the moist air of a cloud,Schaefer would breathe into the machine.Then he would drop into the freezer a bit of powder,sugar,or some other substance.For weeks and months he tried everything he could imagine.Nothing happened.No crystals of ice were formed.None of the substances would serve as the center of a snow crystal or raindrops.5 One July morning,Schaefer was dropping in bits of various substances and watching the unsuccessful results.Finally,a friend suggested that they go to eat lunch and Schaefer went with him.As usual,he left the cover of the freezer up,since cold air sinks and would not escape from the box.6 Returning from lunch,Schaefer found that the temperature of the freezer had risen to a point higher than that required for ice crystals to remain solid.There were two choices now.He could close the cover and wait for the freezer itself to lower the air temperature,or he could make the process occur faster by adding dry ice-a gas in solid form that is very,very cold.He chose the latter plan.As he dropped the steaming white dry ice into the freezer,he happened to breathe out a large amount of air.And there,before his eyes,it happened!He had made ice crystals,not by adding centers to the moisture,but by cooling the breath so much that the liquid had to form crystals!Then he began to blow his breath into the freezer and drop large pieces of dry ice through it to create crystals which became a tiny snowstorm falling slowly to the floor of his laboratory.7 After planning carefully,Schaefer made an experiment by dropping dry ice from his plane to the clouds below him.As was expected,snow formed and fell from the bottom of the cloud.Schaefer succeeded.He made history.Schaefer found a way of how to make ice crystals______.A:imaginativelyB:recentlyC:carefullyD:unscientifically E:accidentally F:satisfactorily
In IPCCX, what is a CSQ?（）A、Common Service Queue B、Competency Service Queue C、Common Skill Queue D、Contact Skill Queue E、Contact Service Queue F、Competency Skill Queue
Which of the following is MOST important to include on the disaster recovery documentation？（）A、 Emergency exitsB、 The test planC、 PayrollD、 All IT contact numbers
单选题The most common cause of scale formation in an auxiliary boiler is （）Aconcentrations of calcium sulfate in the boiler waterBfuel oil in the feed waterCimproper treatment of the feed water with calcium sulfateDexcessive feed water alkalinity
单选题Radio, television and press are ______ of conveying news and information.Athe most three common means Bthe most common three meansCthe three most common means Dthree the most common means
单选题Commercial ships or other persons or agencies requiring the assistance of Canadian Coast Guard icebreakers should first contact（）.Athe Canadian Coast GuardBIce SarniaCthe Ice Navigation CenterDthe icebreaker assigned to the area
单选题The most common cause of lowering the crankcase lube oil flash point is （）.Amore water contentsBcontamination with fuel oilChigher temperatureDsufficient cooling of oil mist
单选题Moisture absorbed in the windings or condensed on the surface of electrical machinery insulation （）Ais good for long term preserving since most insulation is organic and contains some amountBlowers the insulation value and is a common cause of fault grounds in idle machinesCwill enhance insulation resistance only if it is fresh water and contains no saltDreduces the amount of current supplied or drawn by the machine so horsepower is limited
单选题An increase in the heat load to a refrigeration system will cause （）.Athe suction pressure to decreaseBthe suction temperature to increaseCincreased ice formation on the evaporator coilDexcessive short cycling of the compressor
单选题A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is known as（）.AsleetBhailCfreezing rainDrime
问答题Scientists have long assumed that most of the ice that melted was in the Northern hemisphere（半球） during the 30,000-year long ice age.
单选题A light，feathery deposit of ice caused by the sublimation of water vapor directly into the crystalline form，on objects whose temperatures are below freezing，is called（）.AdewBfrostCglazeDsnow