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题型:阅读理解-阅读单选 难度:0.85 引用次数:45 题号:9813394

An electric flying vehicle called Skai was shown yesterday near Los Angeles, California. Skai is made by Alaka’i Technologies. The vehicle has six rotors(旋翼)on the roof and seats inside for five people.

Like a drone(无人机), the vehicle from Alaka’i Technologies takes off and lands vertically(垂直地). It’s one of many similar electric flying vehicles in production, including ones from Boeing and Airbus. But most of them are powered by batteries, which can add a lot of weight. The Skai instead uses very light hydrogen fuel cells to run its rotors, giving it a range of 400 miles(644 kilometers)and the capacity to carry 1,000 pounds(454 kilograms)in people or goods, the company says.

Alaka’i says it’s planning a test flight near its Massachusetts headquarters. It will be flown by an on ⁃ board pilot(飞行员), but the technology exists to eventually fly it remotely and even autonomously. However, it will be years before the Federal Aviation Administration(FAA)allows the autonomous flight of passenger vehicles, said Thaddeus Lightfoot, who helps companies navigate FAA rules.

“Drone⁃ like vehicles such as the Skai must first simply prove their airworthiness, like any common plane. After that, getting commercial certification is another complex process. The technology is interesting, but the regulatory road will be very long,”said Lightfoot, adding that the idea of allowing people to fly in a large aircraft without a pilot is“well outside the current regulatory system.”

Hanvey, CEO of Alaka’i Technologies, said that it could take at least a decade before the company realizes his goal of electric flying vehicles ferrying passengers over major cities at   nearly 120 mph. Before that, he hopes to see Skai aircraft used by first responders to send in food or water following disasters like hurricanes or wildfires. It could also serve as a mobile cell tower, staying in the sky for up to 10 hours over a neighborhood to provide communication services, he said.

1. What is the advantage of the Skai?
A.It is quite light.B.It uses batteries.
C.It carries more people.D.It lands autonomously.
2. What can we infer about the pilotless flight of passenger vehicles?
A.It costs a lot.
B.It saves energy.
C.It is not readily available now.
D.It will soon get approved by FAA.
3. According to Thaddeus Lightfoot, what should the Skai do first?
A.Prove its safety to fly.B.Conduct a test flight.
C.Get a commercial license.D.Obey the International Air Law.
4. Where is the Skai probably first used according to Hanvey?
A.In the countryside.B.In some major cities.
C.In mountainous areas.D.In disaster⁃stricken areas.

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阅读理解-阅读单选(约330词) | 较易 (0.85)
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【推荐1】The world has been extremely impressed by China's high-speed trains that cross the country by the hundreds in all directions every day, but in one corner of this vast land is a gentle reminder that life was not always this fast.

Those fortunate enough to travel to Jiayang in Sichuan province will find railway carriages dragged by steam locomotives(火车头), among the last steam trains operating in China and still running every day. First used to transport coal from Jiayang Coal Mine 62 years ago, today they transport local farmers and their produce to market and serve as a tourist attraction.

“In the early days of the railway, farmers headed for the farm produce market sitting beside coal,” said Liu Chengxi, the Jiayang official in charge of the trains. “As coal production has stopped, the trains are now exclusively(专门地)for farmers and tourists.”

The narrow railway, only 76.2 cm instead of the standard 144 cm, stretches for 19. 84 km, with the trains reaching a top speed of 20 km/h.

A one-way ticket costs 5 yuan for seated passengers and 3 yuan for standing passengers on the ordinary trains regardless of whether they are travelling empty-handed or with animals or vegetables. But Li Cuirong, who has worked as a train dispatcher(调度员)for more than 20 years, recommends tourists pay 80 yuan for a sightseeing train, as the carriages, which have 37 seats, are more comfortable and air-conditioned. A one-way trip takes about one and a half hours.

The scenery is dramatic as the train winds through the mountain, passengers can view chickens and geese wandering among the orange trees and butterflies dancing over the fields and ponds.

Rob Dickinson, a steam train lover from the United Kingdom, has ridden the trains twice. He hopes the narrow line can last long enough for him to find the time to get back again.

1. What can we learn about the steam-powered trains in Jiayang from the text?
A.They are 144cm wide.
B.They have stopped running.
C.They are used to transport coal.
D.They have become a tourist attraction.
2. Why does Li Cuirong recommend a sight-seeing train for tourists?
A.Because it runs faster.
B.Because it is money-saving.
C.Because it is tourist-friendly.
D.Because it offers a round-way trip.
3. What is implied in Rob Dickenson's words?
A.He can't afford to make another trip.
B.The steam-powered trains appeal to him.
C.He expects the narrow line to be lengthened.
D.The present situation of the railway is worrying.
4. What might be the best title for the text?
A.A deserted mine alive again.
B.A train trip back to a slower age.
C.A subway through the mountain.
D.A produce market open to tourists.
2021-04-09更新 | 98次组卷
阅读理解-阅读单选(约340词) | 较易 (0.85)
文章大意:这是一篇说明文。一小组研究人员发现,电池驱动的火车最早将在2023年变得经济可行。该组织认为,电池技术的改进和廉价的可再生能源很快就能让电池动力与普通燃料竞争。文章主要介绍了电动火车的优势以及仍然存在的挑战。

【推荐2】A small team of researchers has found that battery-powered trains could become economical as soon as 2023. The group argues that improved battery technology and cheap, renewable energy could soon allow battery power to compete with common fuel to power trains.

Most of the goods trains in the U. S. run on common fuel, spewing about 0.6 percent of total U. S. carbon emissions. In this new effort, the researchers suggest that switching to battery power could prevent these emissions.

Electric trains in the U. S. get their power from overhead lines — a system that is expensive and inefficient. The team suggests that batteries could provide a better option; more specifically, they claim that a single locomotive equipped with a 14-megawatt battery system would be enough to replace a train powered by a common fuel engine. They further claim that such a locomotive could carry a train about 240 kilometers on a single charge. This would consume half the energy of a common-powered train. And if the battery is charged using a renewable resource, it would reduce the carbon footprint of an electric train to zero.

Most current common fuel locomotives actually run-on electricity — the common fuel is used to power onboard generators. Thus, all that would be needed for most locomotives would be to replace the generators and add a boxcar just behind the locomotive to carry a large battery. Adding more boxcars with batteries would increase the range of the train. The batteries could be charged at designated stops, provided fast-chargers for such large batteries are developed.

As an alternative, battery-carrying boxcars could be changed for fresh ones at designated stops, greatly reducing wait times. The researchers believe that at least for the near future, operating costs would be somewhat higher for battery-powered trains, but they suggest the environmental improvements would make it worth it.

1. What is the probable meaning of the underlined word “spewing” in paragraph 2?
A.Taking in.B.Giving off.C.Cutting down.D.Consisting of.
2. What does the third paragraph intend to tell us about electric trains?
A.Their advantages.B.Their working process.
C.Their travel distance.D.Their carbon footprint.
3. What can we infer about electric trains from this text?
A.There are no fast-chargers at present.B.They are powered by overhead lines.
C.The locomotives will be carried by a boxcar.D.They are environmentally friendly and economical.
4. Why do researchers advocate electric trains at present?
A.For reducing costs.B.For environmental benefits.
C.For higher economic efficiency.D.For the convenience of passengers.
2022-04-09更新 | 120次组卷
阅读理解-阅读单选(约300词) | 较易 (0.85)
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【推荐3】Japan is starting to experiment with self-driving buses in rural (乡村的) communities, such as the town of Nishikata, where the elderly are living a hard life because of fewer bus and taxi services as the population ages and becomes smaller.

The advance of the self-driving technology is making cities such as Paris and Singapore experiment with such services, which could prove important in Japan, where populations are not only graying, but becoming smaller, in rural areas.

Japan could start the self-driving services for communities that are far from cities by 2020, if the experiments begun this month prove successful.

The government plans to turn highway rest stops into centers from which to drive the elderly to medical and banking services.

“Smaller towns in Japan are graying even faster than cities, and there are just not enough workers to drive buses and taxis,” said Hiroshi Nakajima of mobile gaming software maker DeNA Co.

In the initial (最初的) experiments, the elderly of Nishikata were sent from a service area to some organizations providing healthcare services.

“I worry about not being able to go out when I’m no longer able to drive,” said one test rider, Shizu Yuzawa, adding that she would be open to using such services.

The test also checked the vehicle’s safety in road conditions, and if those crossing its path would react to the warning it gives.

The ride, at a speed of about 10 kilometers per hour, felt comfortable and safe, said test taker Mieko Shimazaki, 71, but her 72-year-old husband, Susumu, said, “Self-driving cars could be useful in the future, but I’d like to see them go faster, at least at 40 kilometers per hour.”

1. Why are driverless buses appearing in Nishikata?
A.Nobody there can drive a bus.
B.Its population is aging and falling.
C.People there welcome new things.
D.People there can hardly afford cars.
2. What does the government plan to do?
A.Provide healthcare services.
B.Train more bus and taxi drivers.
C.Produce more and more driverless cars.
D.Set up centers for picking up passengers.
3. What was Shizu Yuzawa’s attitude toward the self-driving services?
A.She was uncertain about them.
B.She was doubtful about them.
C.She was in favor of them.
D.She was strongly against them.
4. Which of the following about self-driving buses did Susumu think could improve?
A.Their speed.B.Their safety.
C.Their space.D.Their price.
2019-08-28更新 | 82次组卷
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