1、写在本试卷上无效。 3. 考试结束后,将本试卷和答题卡一并交回。第一部分 阅读(共两节,满分 50 分)第一节(共 15 小题;每小题 2.5 分,满分 37.5 分)阅读下列短文,从每题所给的A、B、C、D 四个选项中选出最佳选项。ASome of Our New ProgramsSTEM Inventions with LittleBitsIn this invention workshop, students enhance their skills with a great new system of discovery called LittleBits. Its a platfor
2、m of easy-to-use electronic building blocks that empower you to invent anything, from your own remote controlled car, to a smart home device. Students will begin with several inventions designed to let them figure out how the components go together, and then they will design and create their own inv
3、entions. Ages 712.Introduction to Computer AnimationIn this new program, you will have fun designing and creating your own videos. Students will learn the basic skills needed to create and animate. Whether you are making a LEGO brick film, animating in claymation(黏土动画) or capturing a flower bloom, y
4、ou can bring anything to life with computer animation. Ages 712.Computer Programming with OzobotIn this exciting new program, robotics and coding will become elementary! Have fun expanding your horizons with the help of Ozobotthe tiny smart robot. There is no end to the possibilities, as you create
5、a different landscape of adventures, games and coding with Ozobot. Students will use markers, tablets and laptops for coding. Ages 712.Super Science STEM ChallengesIn this engineering camp, you will have fun integrating Science, Technology, Engineering, and Mathematics by building and designing a wi
6、de range of gadgets(小装置), inventive machines, towers and more. Projects include: the Great Tower Challenge, the Standing Cup Pyramid Challenge, Egg Drop Challenge and a host of other fun contests designed to bring out the engineer in you! Ages 712.1. What do students acquire with LittleBits?A. The c
7、hances to have fun.B. The skills in inventing.C. The power to think.D. The permit for designing.2. What can we know about Ozobot?A. It is of similar size to humans.B. It functions as a computer.C. It can assist children to code.D. It can use markers, tablets and laptops.3. Which program is suitable
8、if a kid is competitive?A. STEM Inventions with LittleBits.B. Introduction to Computer Animation.C. Computer Programming with Ozobot.D. Super Science STEM Challenges.BI have come to southern Florida to see how licensed local snake hunters are helping the government cope with the recent explosion of
9、invasive Burmese pythons (缅甸蟒蛇) that is destroying the regions wildlife by eating almost everythingfrom squirrels to rabbits to foxesin their path.Thirty years ago, there were no Burmese pythons in Florida. Now most experts agree there may be as many as 100,000 to 200,000. And theyre reproducing at
10、an alarming rate. The government has to pay to catch and kill the powerful snakes, which can grow to be 20 feet long, as thick as a telephone pole, and weigh over 200 pounds.Im with Tom Rahill, a python hunter, who has caught over 500 of the snakes over the last decade and become known as “the snake
11、 whisperer” for his success. As we walk along theriver bank, I watch Rahill occasionally push a stick into the thick grass. As he looks for more signs, he tells me his stories and about special living habits of snakes.Suddenly Rahill shouts, “SNAKE! There, slowly crossing the limestone road, is a Bu
12、rmese python.” He rushes to the snake. It looks like a five-to-six-footer. Its thick, full belly indicates it must have killed and eaten recently.Expertly, Rahill moves around the snake as it strikes out at him. He then grabs it with one hand firmly behind its head. I grab its tail firmly as the sna
13、ke tries hard to wrestle itself away from me. Then, just as Rahill predicted, it poops (排便) all over me.My pants are covered with smelly Burmese python poop. But I dont care. Weve finallybagged our python. Rahill and I high-five each other. He asks me if I want to keep hunting. I quickly tell him, “
14、Lets go!” As Rahill puts it, there are a lot more pythons out there.4. Why does the government pay to catch and kill Burmese pythons?A. Because few people dare to catch Burmese pythons.B. Because Burmese pythons break the regions ecological balance.C. Because Burmese pythons are difficult to catch.D
15、. Because Burmese pythons are dangerous to people.5. What do we know about Tom Rahill?A. He is a licensed python hunter.B. He is good at telling stories.C. He knows how to speak to snakes.D. He caught 500 pythons last year.6. How does the author feel about hunting pythons with Rahill?A. Guilty. B. D
16、isappointed. C. Funny. D. Excited.7. What does the author mainly tell us in this text?A. The dangerous situation of the wildlife in southern Florida.B. The endangered Burmese python in southern Florida.C. An experience of hunting the ecology-threatening Burmese pythons.D. An experienced python hunte
17、r Tom Rahill.CYouve probably heard that brick-and-mortar retail (实体零售) is in trouble. Even industry giants are closing hundreds of stores. Given retails gradual change to mobile ande-commerce (电子商务), you may be wondering, “What will retail look like in the future?” Nobody knows. But here are a few t
18、hings you can expect to see based on current technology.Ultrafast delivery is coming. Today, the normal practice is two-day delivery. But if youve been paying attention, you know thats changing. In fact, a surprisingly high 25% of consumers said that they would abandon their orders if one-day delive
19、ry wasnt available. Of course, thats just the beginning. Two-hour delivery is coming in the foreseeable future, and Amazon has already been trying 30-minute delivery.Your kitchen will resupply itself. You wont have to worry about running out of essentials like coffee, pet food or snacks because your
20、 containers will sense stock ( 库 存 ) levels and replace those items without you having to lift a finger. No more waking up to find your coffee store is empty or last-minute trips to the grocery store because you forgot to buy pet food.Know exactly whats in stock and where. Have you ever gone to a st
21、ore hoping to buy something, only to learn that they were out of stock? A new feature from Google Home allows people to ask Google Assistants to find in-stock products at the closest store. For example: “Google, where can I find the Nintendo Switch console?” An assistant will tell you how many store
22、s have it right then and how close they are. Of course, it isnt currently available for all stores in all locations, but you can already see a future when it has become standard.Convenience, experience, and optionsretail will take on a new look.8. How does the author develop the passage?A. By asking
23、 and answering.B. By clarifying and describing.C. By analyzing and commenting.D. By comparing and concluding.9. What can we know from paragraph 2?A. Consumers cant get their orders in one day now.B. It is possible to deliver goods within two hours in the future.C. The delivery will be in two days in
24、 the future.D. Superfast delivery has widely been used now.10. According to the passage, what will happen in the future?A. Retail will disappear gradually.B. Industrial giants will rule the whole retail trade.C. Shopping will be more convenient and effective.D. People will ask Google Assistants to p
25、urchase goods.11. Whats the best title of the passage?A. What will retail be like in the future?B. How will new technology change the world?C. How will we run the retail trade in the future?D. What benefits will high-tech bring in the future?DScientists have discovered a new material that can hold t
26、he key to unlocking the potential of hydrogen-powered(氢动力) vehicles.As the world looks towards a gradual move away from fossil-fuel-powered cars and trucks, greener alternative technologies are being explored, such as electric-battery-powered vehicles. Another “green” technology with great potential
27、 is hydrogen power. However, the major obstacles have been the size, complexity, and expense of the fuel systemsuntil now.An international team of researchers, led by Professor David Antonelli of Lancaster University, has discovered a new material that offers a solution. The new material would be us
28、ed to make molecular sieves(分子过滤器) within fuel tankswhich can store the hydrogen and work alongside fuel cells in a hydrogen-powered “system”. It makes the design of tanks far smaller, cheaper, more convenient and energy-denser than existing hydrogen fuel technologies, and significantly outperform b
29、attery-powered vehicles.The cost of manufacturing this new material is so low, and the energy density it can store is so much higher, that the hydrogen fuel cell systems cost five times less than ordinary batteries as well as providing a much longer rangepotentially enabling journeys up to around fo
30、ur or five times longer between fill-ups.The new material makes the cooling system unnecessary. This is crucial because it means cooling equipment does not need to be used in vehicles, resulting in systems with the potential to be far more efficient than existing designs.Although vehicles, including
31、 cars and heavy goods vehicles, are the most obvious application, this material can also be used in portable devices such as drones or within mobile chargers so people could go on week-long camping trips without having to recharge their devices. It could also be used to run a house or a remote neighborhood off a fuel cell.12. What can we infer from paragraph 2?A. Fossil fuel will soon run out.B. It is impossible to conserve fossil fuel.C. Electric cars will replace gasoline cars.D. It is not economical to use hydrogen power now.13. Which of the following best expl
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