The writer explains the boiling water by using ______.A. mythsB. humorC. factsD. arguments
The writer explains the boiling water by using ______.
A. myths
B. humor
C. facts
D. arguments
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29． The writer thinks that people in large cities should __________ ．A． stop the used water from getting into undergroundB． only use the water from the riversC． make their used water clean againD． use as much sea water as possible
30． In order to solve the problem of water shortage，we' have to________．a． make use of sea water on the earthb． save as much fresh water as possiblec． reuse the water from large citiesd． stop people from，using watere． only use the 3% of the water on the earthA．a and eB．a，b and cC．b，c and dD．a，b and d
The writer reveals the "foolishness" of the custom in the paragraph by ______.A. giving old or humorous examplesB. using convincing argumentsC. giving eyewitness accountsD. saying that Philip IV of Aragon put a stop to it
Why does the writer of the letter that Electro-Robo is violent?A. It is control to radio water.B. It is expensive to buy.C. It is 80 centimeterD. It bears arms.
Most people are able to laugh, a sense of _______ is, simply put, the ability to be amused. A. humanityB. humorC. hurryD. hunger
Which of the following problems can occur if you continually fail to drain off condensate from a starting air receiver?A.Corrosion and eventual failure of the tankB.Gumming of the tank relief valvesC.Immediate failure of components downstream of the compressed air systemD.Boiling of the water oil mixture as pressure is reduced
When a vacuum boiling evaporator works, the hot jacket water will pass over the tube stack and ___ the sea water passing through the tubes.A.disposeB.dissolveC.heatD.dissipates
A writer who wants to convince his readers of a point of view must marshall his arguments assert the virtues of his opinions，and( )the possible protests of the opposition. A.diminish B.demonstrate C.declare D.demolish
单选题How did the writer escape the bees?AShe covered her face with her hands.BShe hid behind the rocks.CShe jumped into a water pool.DShe pretended to be a rock.
单选题In what order are the following mentioned in the story?a. The writer rushed down the rocks.b. John jumped into the water.c. The low hum grew louder.d. The bees flew back over their heads.e. The bees were attacking the writer.Ab c e a dBb a e c dCc d e a bDc b d e a
单选题What is the operating principal of a flash type evaporator?（）ASea water is heated to boiling temperature under a vacuumBSea water is passed over heated plates in a thin filmCHeated sea water is injected into a vacuum chamberDSea water is forced through a heated eductor
单选题A definite advantage of using water as a fire extiguishing agent is its characteristic of（）.Aalternate expansion and contraction as water in a liquid state becomes a vaporBabsorption of smoke and gases as water is converted from a liquid to a vaporCrapid contraction as water is converted from a liquid to a vaporDrapid expansion as water absorbs heat and changes to steam
单选题An excessive amount of water is prevented from entering a vessel using a water lubricated stern tube bearing by the use of the （）.Apropeller hubBlignum vitaeCshaft packingDlabyrinth seal
单选题In （）, hot diesel engine jacket water passes over the stack and heats the sea water passing through the tubes.Aa flash generatorBa flash evaporatorCa vacuum boiling evaporatorDa boiler
单选题With a vacuum boiling evaporator, the remainder of sea water fed to the evaporator is pumped out by （）.Aa brine pumpBan air ejectorCa feed pumpDdistillate pump
单选题Because of the reduced （） in the vacuum boiling evaporator, some of the sea water boils as it flows through the tubes.AtemperatureBwater levelCpressureDrate of flow
单选题Which of the following descriptions best identifies the operating principal of a flash-type evaporator?（）ASea water is heated to boiling temperature while under a vacuumBSea water is passed over heated plates in a thin filmCHeated sea water is injected into a vacuum chamberDSea water is forced through a heated eductor
单选题Water ______ be changed into gas, but it ______ be heated to its boiling point.Amust; canBmay; needn’tCcan; mustDneed; may
单选题At the beginning of the 20th century, people made coffee _____ a cloth bag full of coffee grounds into boiling water.Aby dumpingBto dumpCfor dumpingDthat dumped
单选题For the proper control of the air temperature in an air conditioning system using chilled water circulation, which of the listed conditions should remain constant regardless of load changes?（）AChilled water system supply temperatureBChilled water system return temperatureCCompressor discharge temperatureDCompressor suction pressure
问答题Water is vital for our survival and for producing food. It takes about a thousand tons of water to produce one tone of grain that, fed to cows, produces only 18 pounds of meat. Today mankind is using about 160 billion tons more water each year than is being replenished by rain and fed back into water storages. If this water were carried in water trucks, it would require a 300, 000-mile-long convoy of trucks every day—a convoy length 37 times the diameter of the Earth. This is how much water we are using and not replenishing.
单选题All classes of fires can be safely combated using（）AfoamBCO2Clow velocity water fogDhigh velocity water fog
单选题In a vacuum boiling evaporator, the fresh water generated is pumped out by （）.Aa brine pumpBan air ejectorCa feed water pumpDa condensate pump
单选题Water level controllers of the boiler must be kept operable to protect external steam-using plant from water “（）” danger.Acarry offBcarry downCcarry onDcarry over
单选题At the beginning of the 20th century, people made coffee ______ a cloth bag full of coffee grounds into boiling water.Aby dumpingBto dump Cfor dumping Dthat dumped
单选题Which of the following statements is correct relative to distillation plant operation?（）ADistillation is the process of boiling seawater to produce vapor which is condensed into fresh waterBEvaporation is the second part of the distillation process where brine is removedCBrine is the result of condensed sea water vaporDDistillate is the product resulting from the evaporation of fresh water vapor