Fly ash can partly take the place of ______.A. paving materialB. cementC. concreteD. the coal by-product
Fly ash can partly take the place of ______.
A. paving material
B. cement
C. concrete
D. the coal by-product
相关考题：
Some rules are almost the same _______in the world, but rules of etiquette can be different from place to place.A. somewhere B. anywhere C. nowhere D. everywhere
131 Using the table in the Special window, Which task is completed?A. dig holeB. remove debrisC. surveyD. set formsE. place concrete
● Using the table in the Special window, Which task is completed?A dig holeB remove debrisC surveyD set formsE place concrete
– Excuse me, how far is the airport from here? – ( ). A、You can take a taxiB、It's about thirty milesC、I'll fly to SidneyD、It's only six hundred dollars
The traffic is heavy this day, I arrive a bit late, so could you save me a place?A. can B. must C. need. D. might
What are recommended for the candidates to do before the interview?A.Bring many enough copies of the résumé with you.B.Ask about who will participate in the interview.C.Get to know the route to the place and how long it will take.D.Find out if they can park near the place or not.
What cannot be learned from the passage?A、computers will take the place of nurses in the futureB、it is not likely that computers can plan their own moves in chess gamesC、it is not likely that computers can perform. tasks as well as people doD、some programs have been written to give the computers i
I don’t think television will ever ________ books. A.take placeB.take place ofC.take the placeD.take the place of
During a recent OSPF election among three routers, RTA was elected the DR and RTB was elected the BDR, as seen in the graphic. Assume that RTA fails, and that RTB takes the place ofthe DR whi le RTC becomes the new BDR. What will happen when RTA comes back online？（）A. A new election will take place establishing an all new DR and BDR based on configured priority levels and MAC addresses.B. RTA will take the place of DR immediately upon esta blishing its adjacencies.C. RTA will take the place of DR only if RTB fails.D. RTA will take the place of DR only if both RTB and RTC fail.
Which of the following words can best take the place of the word“relish”in the second paragraph?A. chooseB. enjoyC. prepare forD. carry on
It can be concluded thatA.each sport will take only on hourB.students will be chaarged for the four sportsC.all the sports will take place at Kowloon PeakD.teachers will accompany students on each sport
The last paragraph suggests that______.A. a modern computer won't be downB. computers can take the place of humansC. there will be great changes in computersD. sometimes a computer may bring suffering to people
Passage ThreeIn an age when waste today means a lack tomorrow, making use of every available resource becomes more and more important. As coal is being used in greater and greater amounts to produce electricity, larger amounts of ash, by-product of coal, are produced. When coal is burnedin a boiler, two kinds of ash by-product are produced, a heavy bottom ash and a fine-as-powder fly ash that is filtered and captured by precipitators. About 10 to 15 percent of the coal by-product is bottom ash which is used like sand on icy city streets and highways and also on highways as paving material. It is the fly ash, however, that is receiving the greater amount of attention. Fly ash may be used as an additive to concrete in the construction of dams, bricks, and roads, and can replace up to 20 percent of the cement used in concrete. As a by-product of burned coal, fly ash requires no additional expenditure of energy to be produced, while cement production requires great amounts of energy.In addition to using fly ash as a concrete additive, the technology is available to extract the main mineral components-aluminum, silicon, and magnetic. Today, extracting these components is a very expensive process, but the time may come when it is cheaper to extract these products from ash than to mine new supplies.41. What can be used as a material to pave roads?A. The coal by-product.B. Additive.C. Fine-as-powder fly ash.D. Both B and C.
What is a by-product of burned coal?A. Aluminum, silicon, and magnetic.B. Paving material.C. Fly ash.D. Concrete additive.
According to the passage, what attracts man's greater attention?A. Fly ash.B. The construction of dams, bricks, and roads.C. Extracting aluminum, silicon, and magnetic from ash.D. The available technology.
What can be extracted from fine-powder fly ash?A. Aluminum, silicon, and magnetic.B. Additive.C. Paving material.D. Cement.
Where does the conversation most probably take place?A. In the manager’s office. B. In the room of the guest. C. At the police station.
Excuse me, how far is the airport from here? （）AYou can take a taxi.BIt‘s about thirty miles.CI‘ll fly to Sidney.DIt‘s only six hundred dollars.
（）are the three different coatings which can protect metal from corrosion.A、Cement wash, bitumen and paintB、Metal primers, undercoats and topcoatsC、Varnishes, heat-resistant paints and anti-fouling paintsD、Cement wash, primer and undercoat
Excuse me, how far is the airport from here? （）A、You can take a taxi.B、It‘s about thirty miles.C、I‘ll fly to Sidney.D、It‘s only six hundred dollars.
（）can give a hard-wearing surface and the required color.A、PrimersB、UndercoatsC、TopcoatsD、Cement wash
单选题More than one stage of evaporation can take place by admitting the sea water into chambers with progressively （） pressure in the flash evaporator.AlowerBhigherCthe lowerDthe higher
单选题--Excuse me, how far is the airport from here? --（）AYou can take a taxi.BI’ll fly to Sydney.CIt’s about thirty miles.DIt’s only six hundred dollars.
单选题Oxford is a city with such a mind-blowing reputation that many who come herefind themselvs ______ by the place and can’t wait to leave, while others, who take to it like a duck to water, find themselves returning again and again.AthreatenedBintimidatedCdeprivedDmaltreated