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  • 1. 如图所示是内燃机的四个冲程,其中属于压缩冲程的是(   )
    A . 图片_x0020_893550152 B . 图片_x0020_509074867 C . 图片_x0020_2121483527 D . 图片_x0020_1055517077
  • 2. 假定你是李华,市电视台将举办《中国诗词比赛)(Chinese poetry Contest)国际友人专场, 你想邀请对中国文化感兴趣的外教老师Adam一同观赛。请给他写-封信,内容包括:

    1)时间:下周五晚六点半;

    2)地点:市民中心;

    3)诗词比赛的意义。

    注意:

    1)词数100左右;

    2)可以适当增加细节,以使行文连贯。

    Dear Adam,

       

    Yours,

    Li Hua

  • 3. 假定英语课上老师要求同桌之间交换修改作文,请你修改同桌写的以下作文。文中共有 10处语言错误,每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

    增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词;

    删除:把多余的词用斜线()划掉;

    修改:在错的词下划-横线,并在该词下面写出修改后的词。

    注意:1)每处错误及其修改均仅限-词;

    2)只允许修改10处,多者(从第11处起)不计分。

        My classmates Han Mei and I went to the Palace Museum by taxi on last Saturday. On arrival, I reached for my mobile phone, and I couldn't find it anywhere. Han Mei thought I should have left it in the taxi. Immediately she dialed my number and a taxi driver answered it. He said my mobile phone had left on the back seat of his car and he would drive back to return them. Twenty minutes later, while the driver handed me the phone, I was too grateful that I offered him an extra fee. But he refused with a smile, say that he was very pleased to have helped me.

  • 4. 阅读下面材料,在空白处填入适当 内容(1个单词)或括号内单词的正确形式。

        China's first artificial intelligence (Al) textbook for high school students (bring) out last week, following a plan by central government (include) Al courses in primary and secondary school.

        The nine - chapter textbook, (name) " Fundamentals of Artificial Intelligence" , was written by outstanding (scholar) from well - known schools nationwide, under the joint efforts by the research center for MOOC at East China Normal University and Al startup SenseTime. It includes the history of Al and how the technology can be applied in areas such as facial recognition, auto driving and public security.

        "The textbook focuses not only on basics of Al, but on (practice) use of Al in daily life," said Chen Yukun, a professor at East China Normal University, is also a contributor to the book.

        Up till now, about 40 high schools across the country (undertake) the task of being the first group of Al high education pilot program introducing the textbook in the curriculum. "The Al sector is facing a talent shortage (global). The publication of the book is breakthrough as it takes Al technology out of the 'Ivory tower' and makes it part of high school learning," said Lin Dahua, a professor at the Chinese University of Hong Kong.

  • 5. 阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。

        It's common for homeless people to pick up recyclables to sell and make a living. However, it's not so common to see them 1 in a restaurant where the average meal costs $ 150. But that's 2 what happened when a man walked into Benvindo, a 3 restaurant in Belo Hori- zonte.

        According to the staff, a homeless man 4 the waiters at the front door and wanted a 5He also insisted on paying for it with the money he made by 6the cans: a single $ 50 note.

        "I thought this was somewhat 7," said Fontes, a 21 - year - old waiter. But he continued providing 8 for the man as he serves other guests. The man 9 a costly lunch, including a main dish and dessert, which 10$ 121. 80. However, when the man asked for the 11, the restaurant's owner told Fontes to ignore the charge. Instead of accepting the 12 meal, the man politely turned it down and insisted on paying.

        When it became 13 that the man wasn't ready to change his 14, the waiter agreed to charge him $ 10.

        Fontes said, "I then had to 15, saying customers could get a discount on the lunch for there was an ongoing 16, because the man had $ 50 and refused to get the $ 40 17"

        A customer there took a picture of them and shared it online, saying, " I just 18 a great example of consideration. The photo gained hundreds of 19 praising Fontes and the man. Fontes said he simply wanted to 20an act of kindness for an honest hardworking man.

    (1)
    A . wander B . sit C . pour D . serve
    (2)
    A . barely B . obviously C . probably D . precisely
    (3)
    A . high - end B . newly - built C . self - service D . non - profit
    (4)
    A . astonished B . approached C . begged D . urged
    (5)
    A . meal B . drink C . hand D . reservation
    (6)
    A . cleaning B . producing C . collecting D . preserving
    (7)
    A . suspicious B . remarkable C . rude D . extraordinary
    (8)
    A . service B . support C . information D . entertainment
    (9)
    A . declined B . chose C . prepared D . recommended
    (10)
    A . passed down B . went through C . came to D . jumped at
    (11)
    A . order B . tip C . cuisine D . bill
    (12)
    A . expensive B . free C . balanced D . tasty
    (13)
    A . confusing B . significant C . pleasing D . apparent
    (14)
    A . conclusion B . explanation C . position D . expectation
    (15)
    A . promise B . argue C . insist D . lie
    (16)
    A . donation B . trend C . promotion D . custom
    (17)
    A . change B . fee C . offer D . price
    (18)
    A . followed B . witnessed C . heard D . relayed
    (19)
    A . favors B . instructions C . comments D . references
    (20)
    A . perform B . advocate C . share D . applaud
  • 6. 根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余。

        The importance of self - improvement often goes unnoticed. Truth is - you can't run away from yourself. The idea should be to focus on continuous self - development at every stage of life.

       

        Increase Self - awareness.

        The first step of self - improvement asks you to become more self - aware. Self - awareness is an ongoing journey. As life goes on, you meet with different experiences and challenges. To be on the path of self - improvement, it's important to never lose touch with yourself.

    Enhance Strengths.

        Self - improvement lets you identify your personal strengths. It gives you a better understanding of what you are working and where you are likely to be promising. It helps you set life goals and make them happen.

        Step Out of the Comfort Zone.

        Choosing to work on improving yourself requires you to step out of your comfort zone. It lets you face your fears, try new things, and challenge yourself. There will be times when you'll discover a new side of your personality. Don't let failures get you frustrated. And never get self - satisfied and too comfortable in familiar spaces because life begins outside your comfort zone.

       

        People who're invested in their continuous self-improvement come with an extremely positive attitude towards learning. Instead of being ignorant and escaping from their problems, they make it a point to learn from their mistakes to grow and succeed. This is a wonderful quality to have as having a learning attitude is essential in achieving success.

    A. Form a Positive Attitude.

    B. Develop a Learning Attitude.

    C. And knowing your strengths is important.

    D. However, there'll also be times when you'll fail.

    E. They make you more aware of your personality, thoughts and feelings.

    F. After all, you can only achieve what you want when you know what you want.

    G. Here're some reasons why self - improvement is important regardless of your age.

  • 7. 阅读理解

        Being able to take advantage of truly unlimited data is a smartphone user's dream, but everyone I've talked to about 5G is more excited about the usage unlocked by next - generation wireless devices. From smart home security to self - driving cars, all the Internet - connected equipment in your life will be able to talk to each other at lightning - fast speed with reduced delay.

        "5 G is one of those forerunners, along with artificial intelligence, of this coming data age," said Steve Koenig, senior director of market research for the Consumer Technology Association. "Self - driving vehicles are emblematic in this data age - they show application of data completely. With one single task, driving, you have large amounts of data coming from the vehicle itself, and a variety of sensors (传感器)are collecting a lot of information to model its environment as it moves. It's pulling in data from other vehicles about conditions down the road. There's lots of data behind that task, which is why we need the speed and lower latency ((延迟).

        AR glasses and virtual (虚拟的)reality headphones haven't yet been inside the mainstream, but tech companies are joyfully saying that such equipment will eventually replace our smartphones. With 5G, that could actually happen. This is notable because companies such as Apple are reportedly developing AR glasses to improve - or even replace - smartphones.

        Ericsson showed at February's Mobile World Congress in 2019 how smart glasses could become faster and lighter with a 5G connection, because instead of being weighed down with components, the glasses could rely on outside equipment for processing power.

        But don't get too excited. There's still a lot of work to be done in the meantime, including some necessary testing to make sure the radio plays nicely with basic systems and service construction so that 5G isn't concentrated only in big cities.

    1. (1)What does the first paragraph focus on?
      A . Potential of 5G. B . The super speed of 5G. C . Usage of smart equipment. D . The future of smart equipment.
    2. (2)Which word can replace "emblematic" underlined in paragraph 2?
      A . available B . productive C . representative D . popular
    3. (3)What is tech companies" attitude towards the replacement of smartphones?
      A . Uncertain. B . Optimistic. C . Cautious. D . Disapproving.
    4. (4)Why does much work still need to be done according to the last paragraph?
      A . To make radio play nicely. B . To construct big 5G cities. C . To do 5G trials effectively. D . To expand 5G coverage fully.
  • 8. 阅读理解

        Plastics remain one of the most - used materials for making many things. Things made of plastics can be very strong and last a long time. Plastics are also much lighter than metal and can easily be formed into different shapes. Plastics can take hundreds of years to break down on their own. And very few kinds are highly recyclable.

        A team of researchers working at the US Department of Energy says it has created a kind of plastic that could lead to products that are 100 percent recyclable. It recently reported the discovery in a study in the journal Nature Chemistry.

        The researchers say the new material is a plastic polymer (聚合体)called polydiketoenamine, or PDK. The team reports the material can be broken down in parts at the molecular (分子的)level. It can then be built up again to form plastics of different shapes, textures and colors. The researchers say this process can be repeated over and over again—without the plastic material losing any performance or quality.

        "Most plastics were never made to be recycled," lead researcher Peter Christensen said in a statement. " But we have discovered a new way to assemble plastics that takes recycling into consideration from a molecular perspective. "

        Many plastics have different chemicals added to them to make them more useful and powerful. The problem is that these chemicals attach to the monomers (单体), which remain in plastics even after the material gets processed at a recycling plant. The research team reported that, with the newly discovered PDK material, the monomers could be recovered and separated from any chemical additives.

        Next, the researchers plan to develop PDK plastics "with a wide range of thermal and mechanical properties. These plastics could be used for many kinds of cloth, as well as things such as 3D printed materials and foams. In addition, the team is trying to include plant - based materials in the process.

    1. (1)What is the first paragraph mainly about?
      A . Plastics are never highly recyclable. B . Plastics are widely used in our lives. C . Plastics have both advantages and disadvantages. D . Plastics take hundreds of years to be broken down.
    2. (2)What does the underlined word "It" in paragraph 3 refer to?
      A . The new material. B . The research team. C . The molecular level. D . The producing process.
    3. (3)Why do many plastics have different chemicals added to them?
      A . To make them easy to break down. B . To make them easy to get processed. C . To make it possible for them to be recycled. D . To make them stronger and more widely used.
    4. (4)What can we infer from the last paragraph?
      A . PDK plastics will be soon put to good use. B . PDK plastics may have a promising prospect. C . The researchers are busy developing PDK plastics. D . Plant - based materials have been used in the new plastics.
  • 9. 阅读理解

        There are always stories in the life that can hardly be forgotten and will restore our hope for holidays every time we recollect.

        Johnny and I, along with our two young sons, Barry and Doyle, lived in a village in southern Alabama in 1979. We had bought the boys a bicycle for the New Year, and had hidden it in the garage ,where Johnny would assemble (组装)it on New Year5 s Eve after the kids fell asleep. But that day, Johnny had to go to Brookley Air Force Base in Mobile, an hour away, to repair a jet. I had my hands busy with baking, preparing for holiday dinner and caring for two energetic boys.

        Just as I was making the chocolate cake, a neighbor knocked on the door. It was Beatrice, who was the only person on our road with a telephone. The base had called to say that a heavy tool had come apart suddenly, hitting Johnny's arm and breaking the bone. My brother Otto took me to the base hospital while my mother stayed with the children.

        We got there to find Johnny with a cast (石膏)on his arm, anxious to get home regardless of the doctor's orders. It was New Year's Eve, Johnny argued, and he had the bike to assemble for his boys. The doctor said he'd consider dismissing him the next morning if Johnny could find someone to drive him home. On New Year's morning, Johnny called the base and was told everyone was off duty; there was no one to drive him home. Johnny kept making calls. At last, a big blue car with the Air Force sign rolled up.

        I was putting dinner on the table when hearing the car. We were thrilled to see Johnny assisted by a uniformed Air Force officer. With Otto's help, Johnny assembled the boy's gift, and they all had a good time that afternoon. Our hearts were full of gratitude to the people who had gone the extra mile to bring us together.

    1. (1)What had Johnny planned to do on New Year's Eve?
      A . Repair a jet. B . Buy his sons a bike. C . Prepare a surprise gift. D . Assemble a bike with his sons.
    2. (2)Why did Beatrice come to the author's house?
      A . To relay a message. B . To make a phone call. C . To lend out her telephone. D . To take the author to the hospital.
    3. (3)How can we describe Johnny?
      A . Diligent B . Stubborn C . Considerate D . Complicated
    4. (4)What can serve as the title for the text?
      A . A Hard - won New Year Present B . A Treasured New Year Memory C . An Unexpected New Year Dinner D . A Life - changing New Year Experience
  • 10. 阅读理解

        It can be tough to pull kids away from their computers and mobile devices these days. While they're playing games, wouldn't it be great if they could be learning at the same time? Good educational apps offer fun challenges that teach specific grade - level skills. Here are four that combine fun and learning.

        Understanding Math ( $ 3.99 ; iOS)

        Understanding Math goes beyond basic comprehension to gain a deeper understanding of the whys and how's of math. The app tracks your child's progress to determine strengths and weaknesses in different skill areas, and you can customize (订制) your child's learning experience to suit the needs.

        Word Creativity Kit ( $2.99; iOS)

        Word Creativity Kit aims not only to make creative writing fun but also build up grammar rules. The app presents a series of words from seven categories, such as space or fantasy. Kids add their own words to finish the complete thoughts that these words have inspired.

        Barefoot World Atlas ( $4.99; iOS)

        Barefoot World Atlas helps kids learn about geography and world cultures with a touch of the screen. Each region features a set of sub – topics, from wildlife and natural features to native people, landmarks, and architecture. These facts and illustrations are delivered in photographs, sounds, and hundreds of mini videos.

        My Grades & Homework ( $0.99; iOS)

        A combination of grades and homework tracker, My Grades & Homework can help your child stay organized and on top of the progress in school. A convenient calendar and course list format and offer a glance at your child's assignment schedule that he or she might not normally get from standard homework planners.

    1. (1)Which app is beneficial to children's writing skills?
      A . Understanding Math. B . Word Creativity Kit. C . Barefoot World Atlas. D . My Grades Homework.
    2. (2)What is the common part of the four apps?
      A . They need purchasing when downloaded. B . They help children improve their grades. C . They make studies fun because of mini videos. D . They inform parents of their children's progress.
    3. (3)What is the purpose of the text?
      A . To wish readers to bing in more similar apps for children. B . To encourage parents to allow their students to play apps. C . To design the educational apps to combine fun and learning. D . To introduce four educational apps for readers to buy and use.
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