人教版(新教材)高中英语选修2Unit 1　Science and Scientists课时作业3：Grammar-表语从句

1、Grammar表语从句I .阅读理解AGlobal navigationIn ancient times, our ancestors relied on stars to guide them on a clear night.Today, we have navigational systems to help us find our way, with the latest being the Beidou Navigation Satellite System (BDS).The BDS is entirely built by Chinese engineers.With the l

2、aunch of the last satellite from the Xichang Satellite Launch Center on June 23, the global network of 59 satellites has been completed.On July 31, Beidou started providing full-scale global services.Ifs difficult to imagine the great impact those satellites, orbiting (围绕运转)the Earth, have on our da

3、ily lives.When you unlock one of Hellobikes bicycles, you are using the BDS.The popular bike sharing company came out with two new bike models this year that are equipped with the positioning service. The intelligent lock on each bike receives Beidou satellite signals and sends positioning informati

4、on to the data center, which will help collect big data on the bikes and estimate users riding demands in advance according to the data, Chu Yiqun, a manager of Hellobike told Xinhua News Agency.Users can also find shared bikes more accurately thanks to Beidous global positioning accuracy of 2.34 me

5、ters.However, the BDS doesnt just work one way.As the countrys largest space-based system and one of four global navigation networks, along with the United States GPS, Russias GLONASS and the European Unions Galileo, Beidou adopts a unique two way communication system, including its ability to recei

6、ve messages sent by people from areas with poor communication signals.Obviously， this exclusive function isnt designed for users to chat online.Instead, it plays a role when disasters occur and communications are blocked.After the Wenchuan earthquake in 2008, all ground-based communication facilitie

7、s（设施）were interrupted.Though the first generation of Beidou could only send 120 characters in a single message at that time, communication between affected areas and rescue centers was successfiil.Now, Beidous messaging capacity （能力）has been increased to 1,200 Chinese characters in a single message.

8、lt is widely used in disaster alarms, automatic identification （识另U） and information release.As Sun Jiadong, former chief designer of the BDS said： The application of Beidou is only limited by imagination.”K语篇解读本文介绍了中国的北斗卫星导航系统。北斗的服务范围只受想象限制。What can we learn about the BDS from the article?A. It was

9、 co -developed by Chinese and American engineers.B It works better when the weather is good.Its last satellite was launched on July 31.Its able to provide global coverage fbr navigation.K答案X D K细节理解题。由文中第二段可知D项正确。Why does the author mention Hellobike in paragraph 3?To highlight the high positioning

10、accuracy of the BDS.To show how the BDS makes peoples daily lives easier.To present the benefits and limitations of the BDS.To explain how the BDS works.K答案B （推理判断题。由文中第三段可知，北斗使日常生活更加容易。 3. What is the function of Beidous two - way communication system?A. To help people when communication signals ar

11、e poor.B To make communication more fun.C To allow users to chat online more freely.D. To collect feedback from users.K答案H A K细节理解题。由第四段可知A项正确。What does Sun Jiadong imply in the last paragraph?A. Beidou may be more helpful than we know.B Beidou stimulates users9 imagination.Beidou needs to be furthe

12、r perfected.Beidou is limited in application.K答案 A K推理判断题。由最后一段可知，北斗的服务范围只受想象力 限制，应选A项力BHaving a microchip implanted in a mans brain may be common in sci -fi movie plots, but it may soon become an actual possibility.Elon Musk-a US tech mogul （大亨），founder of SpaceX and cofounder of electric car maker

13、 Tesla-has been working on this technology.On Aug 28, Musk gave a livestream demonstration of the chip, which was implanted into the head of a pig named Gertrude.The chip, developed by Musks company Neuralink, is the size of a coin.But dont let its size fool you.The tiny chip has over 3, 000 electro

14、des （电极）attached to flexible threads, which can monitor about L 000 neurons （神经元）.It collects neural signals from an area of the brain, and then transmits those signals wirelessly to nearby computers, according to MSN.In the livestream, Gertrude could be seen walking around her pen sniffing （嗅）the g

15、round while a monitor showed her brain activity.Though the technology is still in its early stage, it is encouraging for humans.This technology “would solve a lot of brain/spine injuries and is ultimately essential for AI symbiosis （共生）”, which allows the human brain to merge （融合）with an artificial

16、intelligence, Musk said in previous interviews.When the device can be applied to humans, its main goal will be to help those who have mobility （行动）issues, such as those suffering from paralysis.Musk hopes this technology could also be used to help those with hearing and eyesight issues and one day l

17、ead to a cure for epilepsy （癫痫）.Although such a device could, in principle, repair those problems, putting it into practice is by no means a piece of cake.Currently, the device can transmit signals from about 500 neurons in the pigs brain.Compared to 80 billion neurons in a human brain, this number

18、is tiny.And to cover the whole human brain also means the electrodes have to be much smaller.Also, implanting the chip into the brain poses a potential danger.There is a risk of the immune system attacking this foreign body.Right now, the hope of controlling the brain via controlling a few neurons s

19、eems overly optimistic. There are many technological challenges.to overcome before Neuralink can put its devices to the purposes, “ Yuan Lanfeng, an associate professor at the University of Science and Technology of China, told China Daily.K语篇解读U本文介绍了马斯克脑机接口新进展。What do we know about Elon Musks micro

20、chip according to the first three paragraphs?It is able to collect wireless signals.It was inspired by sci -fi movie plots.It has no more than 1, 000 electrodes.It is tiny in size but powerful in function.K答案aD K细节理解题。文章的前三段中可知马斯克脑机接口芯片体小 而功能大，故D项正确。UWhat is the ultimate goal of the microchip?A. To

21、monitor animals, brain activity.B To develop a cure for epilepsy.C. To help people who have mobility issues.D. To contribute to the research in AI technologies.K答案cK细节理解题。由文中第五段可知，c项正确。IWhat do Paragraphs 6 & 7 mainly talk about?Potential problems in applying the chip to humans.B Key differences bet

22、ween pigs and humans brains.The amount of time and money implanting the chip could cost.How the immune system is the major obstacle to the implant.（答 案 A R主旨大意题。文中第六、第七段介绍了将芯片植入大脑带来 的潜在危险，应选A。How does Yuan Lanfeng feel about implanting the chip into the human brain?A. Excited.B. Optimistic.C. Cautio

23、us.D. Worried.K答 案c K推理判断题。由最后两段可知植入脑机接口芯片会有风险的。 应选c项。ICArtificial intelligence (AI), 5G wireless technology and electric and self-driving vehicles are the stars of the 2020 Consumer Electronics Show in Las Vegas, Nevada.The show, opened on Tuesday, is one of the worlds largest and most influential

24、technology exhibitions.According to the Consumer Technology Association, the event organizer, more than 4, 500 exhibitors came from around 160 countries.There are around 20, 000 new tech products on display in 36 product categories.Hundreds of companies are showing off their latest creations.Among t

25、he categories, streaming services, 5G connectivity and AI-enabled devices are the growth leaders.While the Internet of things (loT) has set the pace for the market over the past decade, this year the industry is different.“We are increasingly facing an entirely new loT, the intelligence of things, “

26、 said Steve Koenig, the associations vice-president of research.“5G is one of those technologies that are really powering the intelligence of things, “ Koenig said/The story of 5G will continue to unfold as we move forward throughout the decade. According to the association, 2020 will see double -di

27、git growth in the number of 5G smartphones sold and revenue (收益)generated.“This year is the first year to support 5G -enabled smartphones ” , said Lesley Rohrbaugh, director of research for the group. By 2022, two-thirds of the mobile phone market will switch from a 4G focus to 5G, “ she said.The tr

28、end is evident at the electronics show, with companies launching 5G-related devices.TCL, the Guangdong - based TV maker, was to launch its first 5G smartphone on Monday.The company said it will sell for under US$500.Lenovo is working with Qualcomm for its first 5G computer, the Yoga 5G, set for rele

29、ase this spring.During Qualcomms news conference on Monday, company president Cristiano Amon gave an ambitious estimate about the application of 5G in 2020, saying that 200 million 5G smartphones will be launched this year.More than 45 operators globally have already deployed （酉己置）5G, Amon said.In O

30、ctober, 2019, Chinas three major mobile operators launched 5G service plans and made them available in dozens of cities.But 5G is not the only star at the show. You are going to see AI throughout the entire show, “ Rohrbaugh said.K语篇解读R 行业专家表示，人工智能、5G无线技术、电动汽车和自动驾驶 汽车是在内华达州拉斯维加斯举行的2020年消费电子展上的主角。让我们

31、一起 去文中看看吧！According to Koenig, why is the loT different this year?It faces some new challenges.B The nature of it has changed.It requires more advanced technologies.It can no longer satisfy customers,needs.K答 案I B K细节理解题。根据第四段的“We are increasingly facing.the association vice-president of research .可

32、知，该协会负责研究的副总裁史蒂夫,柯 尼格表示：“我们正日益面临一种全新的物联网，即物的智能。”故B项表述 正确。IWhat can we learn from the passage?Streaming services can maximize economic growth.5G products will create more value for companies.5G smartphone sales are expected to achieve double-digit growth in 2020.5G-enabled smartphones are more expens

33、ive than 4G-enabled ones.K答 案H C K细节理解题。根据第五段中的According to the associationand revenue （收益）generated.该协会表示，2020年，5G智能手机的销量和营收将实 现两位数增长。因此C项表述正确。UFrom Rohrbaugh,s words we know that 5G is the only technology that really drives AI5G will make peoples life smarter and more convenientQualcomm plans to l

34、aunch its first 5G computer this springby 2022, more than half of the mobile phone market will shift to 5GK答 案H D K细节理解题。根据第六段中的By 2022, twothirds of the mobile phone market will switch from a 4G focus to 5G, she said.可知,Rohrbaugh 说，至 2022年，三分之二的手机市场将从4G转向5G。因此D项表述正确。X 12. What would be a suitable t

35、itle for this passage?A. The Importance of 5G TechnologyB . New loT一Intelligence of ThingsC. Advanced Technologies Shine at Expo in Las VegasD The Las Vegas Expo Promotes Technological ProgressK答 案1c K标题判断题。本文主要向我们介绍了拉斯维加斯消费电子展 上呈现的先进技术人工智能、5G无线技术和流媒体服务等。因此C项表述 最适合。应选C项。III .七选五One of my earliest me

36、mories was watching my mom talk on our old phone.I was fascinated that she could talk to someone who wasnt actually in the room with her.J_ I was wondering how she managed to talk with someone she couldnt see.That was a long time ago.Later, we had mobile phones that could be carried around the room.

37、 2 These days I can send an e -mail around the world in a second.My daughters smart phone has a hundred apps and a dozen social media accounts.She stores all of her information in a mysterious place known as “the cloud disk”, where she can take it out at any time.lt seems that we are more connected

38、in this world than ever before.3 Few spend time talking face to face.Instead of looking into the eyes of our loved ones, we store their photos at our screens.lt seems that the most connected generations are also the loneliest.Dont let technology take our time and rain our life.Make the time to communicate with each other.Take a walk on the beach with a friend.Have a long conversation with the phones o