英語(yǔ)單選_集考試卷模擬考試題_117

1、姓名：_ 班級(jí)：_ 學(xué)號(hào)：_-密-封 -線- 英語(yǔ)單選_集考試卷模擬考試題考試時(shí)間：120分鐘 考試總分：100分題號(hào)一二三四五總分分?jǐn)?shù)遵守考場(chǎng)紀(jì)律，維護(hù)知識(shí)尊嚴(yán)，杜絕違紀(jì)行為，確?？荚嚱Y(jié)果公正。1、in 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, l

2、arger amounts of ash, by-product of coal, are produced. when coal is burned in 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

3、 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 c

4、ement 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 component

5、s-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.what can be used as a material to pave roads （ ）a.the coal by-product.b.additive.c.fine-as-powder f

6、ly ash.d.both b and2、in 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 burned in

7、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 mate

8、rial. 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 add

9、itional 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

10、 expensive process, but the time may come when it is cheaper to extract these products from ash than to mine new supplies.what is a by-product of burned coal （ ）a.aluminum, silicon, and magnetic.b.paving material.c.fly ash.d.concrete additiv3、in an age when waste today means a lack tomorrow, making

11、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 burned in a boiler, two kinds of ash by-product are produced, a heavy bottom ash and a f

12、ine-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 atte

13、ntion. 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

14、 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

15、products from ash than to mine new supplies.fly ash can partly take the place of _. （ ）a.paving materialb.cementc.concreted.the coal by-product4、in 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

16、and greater amounts to produce electricity, larger amounts of ash, by-product of coal, are produced. when coal is burned in 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 th

17、e 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 roa

18、ds, 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 av

19、ailable 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.according to the passage, what attracts mans greater a

20、ttention （ ）a.fly ash.b.the construction of dams, bricks, and roads.c.extracting aluminum, silicon, and magnetic from ash.d.the available technology.5、in 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 gr

21、eater and greater amounts to produce electricity, larger amounts of ash, by-product of coal, are produced. when coal is burned in 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 concret