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题型:阅读理解-阅读单选 难度:0.65 引用次数:32 题号:20982388

Since the first factories began manufacturing polyester (聚酯) in the 1950s, humans have produced about 9. 1 billion tons of plastic. And about 12 percent has been burnt, releasing harmful gases into the air. Most of the rest has ended up in landfills and in the natural environment. Plastic inhabits the oceans, cities and national parks, in large or tiny pieces.

Carbios is among the companies that are attempting to commercialize a type of chemical recycling, which breaks down polymers into their fundamental moleculars, called monomers (单体). Those monomers can then be recombined into polymers that are as good as new.

But some experts warn that chemical recycling may face many of the same issues that already plague the recycling industry, including competition from cheap plastics made from the raw materials. For the past several years, Carbios has been improving a method that uses an enzyme (酶) found in a microorganism to convert polyethylene terephthalate (PET), a common ingredient in plastic bottles, into its monomers.

Enzymatic recycling’s promise isn’t limited to PET: the approach can be applied to other plastics. In early experiments, it took weeks for enzymes to process just a part of a batch of PET. In 2020, Alain Marty, chief science officer at Carbios, announced they’d developed an enzyme that could stand warmer temperatures and change nearly an entire batch of PET into monomers in a matter of hours.

Most PET produced globally is used for textile fibers, which, because they often contain mixed materials, are rarely recycled. Mats Linder, leader of Stena Recycling in Sweden, said he’d like to see recycling technologies focus on these and other parts of the recycling industry where conventional recycling is coming up short.

As it happens, Carbios is working to do just that. Gregg Beckham, a senior research fellow at the National Renewable Energy Laboratory, believes the global plastic problem will call for a diverse mix of technological solutions. He thinks enzymatic recycling and other recycling technologies are advancing rapidly, and he’s optimistic that they’ll have a role to play.

1. What can be inferred from the first paragraph?
A.Polyester has been made for a century.B.Most plastic is not recycled.
C.People should stop using plastic.D.Most plastic is buried in landfills.
2. What does the underlined word “plague” in Paragraph 3 mean?
A.Trouble.B.Inspire.C.Influence.D.Determine.
3. What can we know about enzymatic recycling?
A.Many companies have been using this method.
B.Enzymatic recycling can only be used to break down PET.
C.It was Carbios that invented enzymatic recycling.
D.Great progress has been made in enzymatic recycling.
4. What opinion does Gregg Beckham most probably hold?
A.Enzymatic recycling is costly but effective.
B.Carbios is the pioneer in recycling plastic.
C.Enzymatic recycling has a bright future.
D.Chemical recycling technologies are limited.

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文章大意:这是一篇说明文。2600多家企业齐聚中国国际进口博览会,展示各自的先进产品,文章分享了其中三款全球首秀的黑科技产品,分别是快速新冠检测仪,近视防控镜片和便携皮划艇。

【推荐1】More than 2,600 enterprises gathered and presented their advanced products at the China International Import Expo (CIIE). And many innovative products have made their world premiere. Let’s have a look at three of them.

Quick corona-virus test machine

Nucleic acid testing could be faster in the future. King Fisher Apex, made by the Finnish tech company Thermo Fisher Scientific,can complete the extraction of 96 nucleic acid samples in just 15 minutes. The tester can purify nucleic acid and protein automatically to save researchers’ time spent on additional steps, significantly improving nucleic acid test efficiency. Also, the system eliminates manual intervention. The risk of exposure to harmful re-agents or biological samples, such as blood,is greatly reduced for medical staff.

Myopic (近视) prevention glasses

Here comes a lifesaver for teenagers with poor eyesight — a myopic control lens. Whether it’s a classroom blackboard or a tablet,an outdoor activity or a mobile phone game, the Stellest lens from Essilor, a French company, keeps the same control effect, with changeable viewing angles and constant visual clarity. The lens can create a beam in front of the retina that will slow down the increase of the eye axis. Therefore, the development of myopia can be contained.

Portable kayak

A folding,portable,18-kilogram“backpack”can be inflated into a kayak. The safe, lightweight ITIWIT X500 Kayak,made by Decathlon,a French sports goods group, makes kayak racing accessible to the majority. It consists of five“air chambers”, so even if two of them don’t work, the inflatable kayak will help passengers safely return to land.To solve long-standing problems in the kayak industry — from lack of durability to overall insufficient performance — the company applied a special metal processing technology to its product. The ITIWITX500 Kayak’s V-shaped bottom makes this product long-lasting and tough.

1. Whose safety is largely guaranteed by King Fisher Apex?
A.The tester.B.Researchers.
C.Medical staff.D.The COVID-19 infected.
2. What do we know about the Stellest lens?
A.It is designed for people with poor eyesight.
B.It can be a cure for adolescent myopia.
C.Its control effect is mainly determined by viewing angles.
D.It may keep teenagers from developing high myopia.
3. Which part ensures the durability of the portable kayak?
A.Its air chambers.B.Its V-shaped bottom.
C.Its light weight.D.Its portable feature.
2023-01-04更新 | 127次组卷
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文章大意:本文为说明文,讲述全球首个无人驾驶载人航空器“亿航智能”获认证,城市空中交通有望由其领航。

【推荐2】Imagine Hying over the city in an electric powered aircraft that has no pilot but can take you from point A to point B in minutes. Sounds like science fiction, right? Well, not anymore. China-based Ehang has become the world’s first company to receive official approval to fly passengers in its pilotless air taxis.

Ehang’s EH216-S air taxis are electric vertical (垂直的) takeoff and landing aircraft, also called eVToL for short. The air taris can carry up to wo passengers or about 270kg of goods. They can fly at speeds of up to 130kmb and distances of up to 28km. The air taris are controlled by a central command centre that monitor the light, routes and weather conditions.

Passengers can simply select their destination on a touchscreen inside the cabin and enjoy the ride without worrying about piloting the aircraft. The taxis do not require airports or runways. They can take off and land vertically from any flat surface.

The air taxis use electric power to reduce environmental harm caused by emissions. They can be fully charged in two hours and have bow nose levels. They also have backup batteries and emergency landing systems and parachutes in case anything goes wrong.

They could transform how we travel around big cities —imagine using them to avoid traffic jams, save time on the daily commute (通勤) to work or school, or get to places that are hard to reach by car or public transport. And beyond just moving people, the aircraft can be used for delivering goods, such as packages, medical supplies or food. During natural disasters such as bushfires or foods, air taxis could transport much-needed medical staff, equipment or medicines to the scene quickly and safely.

One big challenge will be gaining the trust of the public and convincing commuters they are safe while flying. To do this, Ehang will educate passengers about the benefits and risks of using its taxis while also addressing potential issues and concerns about noise levels, privacy and the environmental impact.

1. What do we know about EH216-S air taxis?
A.They don’t make any noise.B.They are environment-friendly.
C.They are controlled by eVTOL.D.They can carry 270kg of goods and two persons.
2. Which of the following places is most suitable for air taxis to take off?
A.A swimming pool.B.An empty street.
C.A crowded car park.D.A woody valley.
3. What’s paragraph 5 mainly about?
A.Where air taxis can work.B.When air taxis function well.
C.Why air taxis are needed.D.How air taxis can be used.
4. How will Ehang gain the trust of the public?
A.By providing a free tip for brave passengers.
B.By rewarding the most reliable passengers.
C.By explaining is taxis advantages and disadvantages.
D.By stressing the importance of environmental protection.
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【推荐3】Don’t know how to take care of your plants? A little spider-like robot will go for the sunlight, run to shade, dance when it’s doing well and stomp (跺脚) when it needs to be watered.

It’s called the HEXA Plant, a six-legged machine created by Vincross, a technology company in Beijing, China.

The plant robot will go for sunlight when it needs sun, then will move around in order to absorb the sunlight on all sides. When it needs to cool off, it will look for shade. It also plays with humans and dances when it is happy, moving its legs up and down. But it gets “angry” when it’s thirsty by stomping around.

With six legs, the HEXA Plant can move anywhere. It’s nimble enough to go in any direction and around any objects in its path. It has a variety of “eyes”, including an infrared sensor (红外线传感器), a distance sensor and a 720p camera with night vision, which could be very handy if you want to send it out at night to check on any sudden noises. It has built-in WiFi as well as USB ports to expand its talents.

The inventor of the cute robot, Sun Tianqi, was inspired by a dead sunflower at a flower exhibition that had been sitting in the shade all day. That was when he had the idea for the walking plant robot. He wanted to allow plants to experience movement.

1. What can the HEXA Plant do?
A.Sing and dance.B.Drink water when it’s thirsty.
C.Find a cool place when it feels hot.D.Move the things in its path.
2. What does the underlined word “nimble” in the fourth paragraph mean?
A.Happy.B.Smart.C.Angry.D.Lucky.
3. What inspired Sun Tianqi to invent the HEXA Plant?
A.A green plant.B.A dead sunflower.C.An intelligent robot.D.A strange animal.
4. Where can we most probably read the passage?
A.In an advertisement.B.In a novel.C.In a science magazine.D.In a storybook.
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