試卷征集
加入會(huì)員
操作視頻

China will deliver its first homemade C919 large passenger plane by the end of 2022,reported Xinhua.
   The plane,developed by the Commercial Aircraft Corporation of China(COMAC),gained the type certificate(TC) from the Civil Aviation Administration of China(CAAC) at the end of September.
   "The type certificate means the C919 has the 'certificate of entering' into the civil aviation (民航)market." Yang Zhenmei a senior CAAC official,told Xinhua.It also shows that China has the ability to independently develop world-class large passenger aircraft,and marks an important milestone for the country's large aircraft industry.
   The C919 is a fourth-generation aircraft,which has a wingspan of nearly 36 meters,a length of about 39 meters and a tail height of around 12 meters.It has 158 to 168 seats.With a range of 4,075 to 5,555 kilometers,the C919 is able to fly between any two cities in China.So far,800 C919 aircraft have been ordered by 28 customers.
   Its aerodynamically - designed wings made from advanced metals and composites(復(fù)合材料) help improve fuel efficiency while reducing noise in the cabin .Its cockpit(駕駛艙) with the latest navigation technology and the so-called "fly by wire" computer controls,makes the C919 competitive with other narrow-body jets.
   Wu Guanghui,the chief designer of the C919,said he believes China will need around 2,000 narrow-body jets like the C919 in the future. "It will take up more than 70 percent of the commercial aircraft in China's civil aviation industry.We decided to make this kind of plane because it's the most needed product in the market." said Wu.

(1)What can we learn about the C919 from the first two paragraphs?
D
D

A.It was delivered to foreign customers.
B.It was built with the help of other countries
C.It was moved out of the civil aviation market.
D.It got the type certificate from CAAC in September.
(2)What probably makes the C919 better than other narrow-body jets?
C
C

A.The size of the C919.
B.The distance that the C919 can fly.
C.The advanced technology the C919 used.
D.The number of passengers that the C919 can hold.
(3)What can we know from Wu Guanghui's words?
A
A

A.The C919 has huge market potential(潛力).
B.The C919 is welcomed by civil passengers.
C.China will not make money from selling planes.
D.China is going to rule the world aircraft market.
(4)What is the author's purpose in writing the passage
A
A

A.To report a key event of the C919.
B.To compare the C919 with other planes.
C.To announce the disadvantages of the C919.
D.To support technological innovation of the C919.

【考點(diǎn)】科技;新聞報(bào)道
【答案】D;C;A;A
【解答】
【點(diǎn)評(píng)】
聲明:本試題解析著作權(quán)屬菁優(yōu)網(wǎng)所有,未經(jīng)書(shū)面同意,不得復(fù)制發(fā)布。
發(fā)布:2024/5/27 14:0:0組卷:2引用:1難度:0.5
相似題
  • 1."There are more people actively learning a language through DuoLingo than in the entire US public school system." says Luis von Ahn,founder of the free language learning app.Since its launch(投放市場(chǎng)) in 2012,more than 30 million people have downloaded(下載)the app,which gamified education and attracted many language learners.
       The growth of technology for educational use has changed the way in which people learn and receive education.This is particularly true for languages,an area in which the explosion of mobile apps and interactive software has provided choices to a range of people who were previously unable to receive foreign language education.
       Von Ahn says that when he founded DuoLingo he decided to find a way for people to learn a language for free.Free use of languages was something he had a personal interest in addressing:he grew up in Guatemala,where he was surrounded by people all trying to learn English,half of whom were failing to do so and a lot of whom could not afford it.
       One of the big changes caused by tech is the change in language learners.Languages have long been connected with the rich people,but now people from less rich backgrounds are finding affordable ways to learn.
       Von Ahn says an unexpected result of DuoLingo being an app is that it's attracting an unlikely type of user.DuoLingo was designed(設(shè)計(jì))to be like a game,and what the company has found is that many users aren't even necessarily diehard language fans,they're just looking for an educational way to kill some time.
       "They're still procrastinating from something else,but at least it's somewhat useful." says Von Ahn, "The truth of the matter is that learning a language takes months or years.We have to find a way to keep them interested and that's where the gamification came in."

    (1)What can we say about DuoLingo after its launch?

    A.It is used by entire US schools.
    B.It costs 30 dollars to download.
    C.It changes the use of languages.
    D.It makes education more enjoyable.
    (2)Why does the author mention Von Ahn in paragraph 3?

    A.To show his poverty in childhood.
    B.To explain why he founded the app.
    C.To prove he was interested in the app.
    D.To find out how he designed the app.
    (3)What change does DuoLingo bring to language learners?

    A.They can master a language faster.
    B.They become language fans totally.
    C.They can learn in a low-cost way.
    D.They can now use it to kill some time.
    (4)Which of the following can be the best title for the text?

    A.Reasons for Learning a Language
    B.How to Learn a Language Online
    C.The Development of a Language App
    D.Mastering a Language with DuoLingo

    發(fā)布:2024/10/31 3:30:1組卷:23引用:4難度:0.3
  • 2.    Rice now has its own big data platform,claimed a conference in early April.Led by the China National Rice Research Institute,the platform records data throughout every,stage of rice production,including collection,storage,and analysis.It will also regularly publish reports to improve the service of rice production,providing convenience to farmers.Apart from big data,other technology is aiding agriculture in China in recent years.
        Flying above
        Drones(無(wú)人機(jī))play an important role in farming this spring. "Using drones to spread the nutrient solution(營(yíng)養(yǎng)液)is a lot safer than doing it manually(手動(dòng)地), "Shi Zhenhai,a farmer in Henan who is responsible for about 119 hectares of wheat fields said.Shi added that the flying machines greatly improved efficiency.The more advanced drones that the farmer bought recently can be filled with 50 liters of liquid,which can be used to cover about 3.4 hectare farmland.With four drones working at the same time,it only takes three hours to finish spreading the solution over all of Shi's land.
        Monitoring on their own
        A smart glass greenhouse used to grow tomatoes features more than 120 patented technologies.Located in Shandong,the demonstration base covers' about 80,000 square meters but requires very few workers.
        Sensors collect information about the plants,such as the humidity(濕度)of the environment,the condition of sunlight and heat,and whether the room is ventilated(通風(fēng))enough. It is then uploaded to a platform to be analyzed.The correct levels of water and fertilizer are supplied to crops by the automatic irrigation system,Robots and other devices are used to pick and transport tomatoes.
        With facilities to store heat,the structure does not use huge amounts of energy in winter,unlike traditional greenhouses. "Growing crops in a controlled environment enables farmers to produce high-quality plants,maintain high food safety standards,and avoid the use of pesticides," Wang Haiguang at the operations office of the greenhouse said.

    (1)How do the drones play a part in farming?

    A.Spread the seeds.
    B.Work at high altitudes.
    C.Improve the working efficiency.
    D.Provide early warning in wheat fields.
    (2)What does "It" underlined in paragraph 4 refer to?

    A.The information.
    B.The sensor.
    C.The humidity.
    D.The robot.
    (3)With the help of the advanced technology,farmers can enjoy many benefits EXCEPT
    .
    A.a(chǎn)pplying big data platform
    B.a(chǎn)voiding the use of pesticides
    C.producing high-quality plants
    D.using huge amounts of energy in winter
    (4)Where is the text most likely to come from?

    A.A book on eating habits.
    B.A magazine about high-tech agriculture.
    C.An article on the introduction to drones.
    D.An environmental conservation booklet.

    發(fā)布:2024/7/27 8:0:9組卷:2引用:1難度:0.5
  • 3.Our solar system might be crazier than we once thought.Scientists say that deep within Uranus(天王星) and Neptune(海王星)it rains diamonds.
       On Earth,diamonds form under extreme heat and pressure.The inside of Uranus and Neptune also has high temperatures and pressures.What's more,the blue planets are largely made up of icy water and gases such as methane(甲烷).
       So scientists have long believed that deep inside the two planets,the heat and pressure turn the methane into hydrogen(氫)and carbon(碳).Then diamond rain would form,falling toward the center of the planets.
       But no one could prove that this would really work-until now.In a study published recently in the journal Nature Astronomy,scientists say they were able to create this kind of "diamond rain" in a lab,reported The Guardian.
       Scientists used high-powered lasers to create pairs of shockwaves through a kind of plastic.The plastic is made from hydrogen and carbon,much like methane.The shockwaves created high pressure and heat,like that inside Uranus and Neptune.
       "The experimental time is very short," Dominik Kraus,lead author of the study,told The Guardian. "That we saw this very clear signature of diamonds was actually very,very surprising."
       The diamonds created in the lab were tiny,only a few nanometers(納米)wide.Scientists believe that diamonds would be much larger within Neptune and Uranus.Then they might slowly sink toward the planet's center because of gravity.

    (1)What factors are needed to form diamonds?

    A.Icy water and gases.
    B.Hydrogen and carbon.
    C.Extreme heat and pressure.
    D.High-powered lasers.
    (2)What does the underlined word mean in the last paragraph?

    A.Unsuccessful.
    B.Natural.
    C.Real.
    D.Small.
    (3)How did scientists prove the theory of forming diamond?

    A.By giving examples.
    B.By doing experiments.
    C.By explaining statistical data.
    D.By stating argument.
    (4)What can be referred from the text?

    A.There are many high-powered lasers in Neptune and Uranus.
    B.Scientists long believe that there are diamonds inside Neptune and Uranus.
    C.The shockwaves inside Neptune and Uranus crate high pressure and heat.
    D.Deep inside Neptune and Uranus could be full of diamonds.

    發(fā)布:2024/9/19 9:0:8組卷:5引用:2難度:0.5
小程序二維碼
把好題分享給你的好友吧~~
APP開(kāi)發(fā)者:深圳市菁優(yōu)智慧教育股份有限公司 | 應(yīng)用名稱:菁優(yōu)網(wǎng) | 應(yīng)用版本:4.8.2  |  隱私協(xié)議      第三方SDK     用戶服務(wù)條款廣播電視節(jié)目制作經(jīng)營(yíng)許可證出版物經(jīng)營(yíng)許可證網(wǎng)站地圖本網(wǎng)部分資源來(lái)源于會(huì)員上傳,除本網(wǎng)組織的資源外,版權(quán)歸原作者所有,如有侵犯版權(quán),請(qǐng)立刻和本網(wǎng)聯(lián)系并提供證據(jù),本網(wǎng)將在三個(gè)工作日內(nèi)改正