What can be extracted from fine-powder fly ash?A. Aluminum, silicon, and magnetic.B. Additive.C. Paving material.D. Cement.

题目

What can be extracted from fine-powder fly ash?

A. Aluminum, silicon, and magnetic.

B. Additive.

C. Paving material.

D. Cement.

相似考题

1.CA volcanic eruption in Iceland has sent ash across northern Europe. Airlines have stopped or changed the flights across the Atlantic Ocean, leaving hundreds of passengers stuck in airports.Grirmsvom is one of the largest and most active volcanoes in Europe. What makes Grimsvom different is that it lies under a huge glacier（冰川） of ice up to 12 maters thick. The hot volcano heats up the ice above it, which then forms a layer（层）of water between the glacier and the volcano This layer of water puts pressure on the volcano, keeping it stable, As the water flows out from under the glacier, the pressure lifts. The lava（岩浆） from the volcano then comes up to the surface. This is exactly what happened today.Now, airlines have to make changes to their flights so as not to fly through the clouds of volcanic ash. According to KLM. one of Europe’s biggest airlines, airplanes cannot go under the cloud or over it. Going through the cloud can result in ash getting stuck in the airplane’s engines, causing damage to the plane.The eruption has also caused problems for animals in Iceland. The volcano left ash and sharp. Glass-like rocks all over the countryside. Farmers are keeping their animals inside to stop them from eating ash- covered grass to the sharp object.64. What makes Grimsvom different from other volcanoes?A. It is below ice.B. It lies under the seaC. It is the largest volcanoD. It is lava affects the airlines

2.BHave you ever wondered?1.Why do airplanes take longer to fly west than east?It can take five hours to go west-east from New York(NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon know as the jet(喷射) stream. The jet stream is a very high altitude wind which always blows from the west to the east across the Atlantic. The planes movement a constams air speed thus go faster in the west-east direction when the air moving with the wind than in the opposite direction.2 What would happen if the gravity on Earth was suddenly turned off?Supposing we could magically turn off gravity. Would buildings and other structures float away? What happened would depend on how strongly the things were attached to the Earth. The Earth is moving at quite a speed moving at over a thousand miles per hour. If you turn something round your head on a string, it goes around in a circle until you let go of the strong go of the string. Things not attacked to the Earth would fly off in a straight line . People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling. Most things would fly off into space.60.What information coa we get from the first passage?A.tis the iet stoomn that affeets how fast airplanes fly.B.Planes go slower when they are moving with the wind.C.It takes more time to fly from NY to London than from London to NY.D.The jet stream always blows from the east to the west across the Atantic.

3.We can obviously notice that over a period of no practice what has been learned tends to be forgotten from______.

4.– 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

更多“What can be extracted from fine－powder fly ash?A. Aluminum, silicon, and magnetic.B. A ”相关问题

  • 第1题：

    回答 64 ~ 67 题：A volcanlc ctuption in iceland has sent ash zcross northern Europe .Airlines have Stopped or changed the flights across the Allantic Ocean , leaving hundrede of passengets stuck in aipports.

    Grimsvotn is one of the largest and most active volcadoes in Europe. What makes Grimsvom different is that it lies under a huge glacier(冰川) of ice up to 12 maters thick. The hot volcano heats up the ice above it, which then forms a layer(层)of water between the glacier and the volcano This layer of water puts pressure on the volcano, keeping it stable, As the water flows out from under the glacier, the pressure lifts. The lava(岩浆) from the volcam then comes up to the surface. This is exactly what happened today.

    Now, airlines have to make changes to their flights so as not to fly through the clouds of volcanic ash. According to KLM.one of Europe’s biggest airlines,airplanes cannot go under the cloud or over it. Going through the cloud can result in ash getting stuck in the airplane’s engines,causing damage to the plane.

    The eruption has also caused problems for animals in Iceland. The voicane left ash and sharp. Glass-like rocks all over the countryside. Farmers are keeping their animnls inside to stop them from eating ash- covered grass to the sharp object.

    第9题：What makes Grimsvotn different from other volcanoes?

    A．It is below ice.

    B．It lies under the sea

    C．It is the largest volcano

    D．It is lava affects the airlines


    正确答案：A

  • 第2题：

    It’S e__________________ for him to fly a kite．He can fly it well．


    正确答案：
    easy

  • 第3题：

    when the fuel is provided by the supplier ,what specifications of the oil can you get from the supplier receipt ?


    正确答案：The following information of the fuel shall be avalaible : density ,viscosity ,temperature as delivered ,water content ,sulfur content ,flash point and so on .

  • 第4题：

    The fol lowing line of output was extracted from the output of the show ip bgp command on Router R1. Which of the following can be determined from this output?（）Network Next Hop Metric LocPrf Weight Path* 130.1.1.0/28 1.1.1.1 0 1 2 3 4 i

    A. The route is learne d from an eBGP peer

    B. The route has no more than three ASNs in the AS_PatH

    C. The route is the best route for this prefix

    D. None of these facts can be positively determined by this output


    参考答案：A

  • 第5题：

    Passage Three

    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 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.


    正确答案：A
    答案为 A。根据题干找到第一段第三、四句，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 符合题意。

  • 第6题：

    Fly ash can partly take the place of ______.

    A. paving material

    B. cement

    C. concrete

    D. the coal by-product


    正确答案：B
    答案为B。根据第一段倒数第二句，and can replace up to 20 percent of the cement used in concrete, "replace"相当于“take the place of”

  • 第7题：

    what can we infor from the last sentence of the text ?

    A． hapiness comes from peaceful life in the country

    B．Health is more important than money

    C．the harmoney betwwenn man and nature is important

    D．good old day will never be forgotten


    正确答案：C

  • 第8题：

    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.


    B
    略

  • 第9题：

    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.

    正确答案:B

  • 第10题：

    The ‘fsck -p /dev/lv00’ command returned the following message：Not a recognized filesystem type. What is the likely cause of the problem and how should it be resolved？（）

    • A、The file system superblock is dirty. It can be replaced from the VGDA
    • B、The logical volume superblock is dirty. It can be replaced from the VGDA
    • C、The file system superblock is dirty. It can be replaced from the secondary copy
    • D、The logical volume superblock is dirty. It can be replaced from the secondary copy

    正确答案:C

  • 第11题：

    填空题
    What we can learn from “Paper from Rag” is that you had better buy archival materials from specialist suppliers.____

    正确答案： I
    解析：
    根据题干中的信息“Paper from Rag”可以定位到I段“The only safe solution is to purchase from specialist suppliers”，故匹配段落为I。

  • 第12题：

    单选题
    --Excuse me, how far is the airport from here? --（）
    A

    You can take a taxi.

    B

    I’ll fly to Sydney.

    C

    It’s about thirty miles.

    D

    It’s only six hundred dollars.


    正确答案： C
    解析： 暂无解析

  • 第13题：

    From what you _____, you can understand why an object weighs less in water than in air.

    A、had learnt

    B、will learn

    C、have learnt

    D、can learn


    参考答案：C

  • 第14题：

    What can we learn from the article?(1．5分)

    ________________________________________________


    正确答案：
    It's important to be satisfied with what you’ve got．

  • 第15题：

    We can learn from the text what the problem really matters is ( )．

    A． that women interrupt a career to have children

    B． what sort of work women do

    C． because they are women

    D． what an unfair pay women get in workplaces


    正确答案：B
    B  [解析]根据第五段The biggest problem isn’t equal pay in workplaces such as factories.  It is a sort of work women do.知道问题不在于同样工作的薪水不同，而在于做的工作不同。所以答案选B。

  • 第16题：

    What can we infer about primitive birds from the text?

    A．They had claws to help them climb.

    B．They could fly long distances.

    C．They had four wings like hoatzins.

    D．They had a head with long feathers on the top.


    正确答案：A

  • 第17题：

    What is a by-product of burned coal?

    A. Aluminum, silicon, and magnetic.

    B. Paving material.

    C. Fly ash.

    D. Concrete additive.


    正确答案：C
    答案为 C。根据题干找到第一段第三句， two kinds of ash by-product are produced： a heavy bottom ash and a fine-as-powder fly ash符合题意。

  • 第18题：

    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.


    正确答案：A
    答案为A。根据第一段最后一句，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作出该项选择。

  • 第19题：

    There are four questions,which is not from the discourse teaching?

    A.What does the author imply?
    B.Should we say“a apple”or“an apple”?
    C.What can be inferred from the text?
    D.What's the writer's main opinion?

    答案：B
    解析：
    考查语篇教学

    B选项，是关于冠词的正确用法，符合题意选择不正确选项，故此题的正确选项为B。

    C和D选项都是和语篇相关的，故排除。

    故此题的正确选项为B。

  • 第20题：

    （）I enjoy most is（）I can have a holiday from work.

    • A、That;that
    • B、That;what
    • C、What;what
    • D、What;that

    正确答案:D

  • 第21题：

    （）? -I am your agent. I want to see the captain.

    • A、What are you?
    • B、What can I do for you?
    • C、Where are you from?
    • D、What are you doing?

    正确答案:B

  • 第22题：

    问答题
    What can we infer from the last sentence in Paragraph 2?

    正确答案： Dad refused the meal prepared according to a new recipe.
    解析：
    推理题。根据题干定位至原文的第二段。根据该段的第一句话：“Dad was a creature of habit. He didn’t always greet new experiments in cooking with glee.”可知，“父亲的习惯常年不变，不喜欢尝试新食物。”而后文提到“我刚开始学习烹饪，喜欢邀请父母品尝新手艺，”该段的最后一句话说到：Dad would look at his plate suspiciously and ask, “Am I the ‘guinea pig’ for this meal?”由此可见，当父亲看到盘子中的菜时，怀疑自己是女儿实验用的“小白鼠”，而不愿意吃其中的食物，因此父亲拒绝品尝新手艺。

  • 第23题：

    单选题
    The fol lowing line of output was extracted from the output of the show ip bgp command on Router R1. Which of the following can be determined from this output?（） Network Next Hop Metric LocPrf Weight Path * 130.1.1.0/28 1.1.1.1 0 1 2 3 4 i
    A

    The route is learne d from an eBGP peer

    B

    The route has no more than three ASNs in the AS_PatH

    C

    The route is the best route for this prefix

    D

    None of these facts can be positively determined by this output


    正确答案： A
    解析： 暂无解析

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