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题型:阅读理解-阅读单选 难度:0.65 引用次数:133 题号:9301153

It used to be mostly the army that used small, unpiloted aircraft, called “drones”. The little planes were very costly. But as they have dropped in price more people have begun to use them.

The fast rate of development of computer technology, image sensing equipment, satellite navigation and smart phones has led to lower-priced drones. Researchers and developers have learned how to build smaller and less costly drones. Nowadays, moviemakers are using drones to film from the sky. Historians use them when they explore ancient buildings. Rescue workers use them to look for people. And now farmers are also using them to watch over their crops.

Romain Faroux is a French businessman, whose father was a farmer. He believed drones could help farmers. He has helped create a company which has developed a small drone that could be controlled by people on the ground. It’s called “Agridrone”. It uses a special sensor to examine crops. The technology used on the drone is similar to that used on a smartphone -- except it has wings. A computer program directs the drone to fly over the crops. The sensor on the drone records four different-colored “bands” of sunlight that are reflected off the crops.

Jean-Baptiste Bruggeman is another farmer in France who is using a drone. He says the drone flies over his crops at different times of the season and provides a lot of information about his crops. The pictures taken by the drone show him the exact amount of fertilizer the crops need. It also shows exactly where the fertilizer is needed.

Romain Faroux says farmers use information provided by the Agridrone to place fertilizer only in areas where it is needed. This saves money and reduces pollution. Before they used the drones, farmers would put the same amount of fertilizer everywhere. Drones also save time because farmers can examine up to three hectares (英亩) in about a minute.

1. Why do rescue workers and farmers begin to use drones?
A.Because they are affordable now.
B.Because their sizes have become smaller.
C.Because they can save people a lot of time.
D.Because the technology has been developed.
2. What is the sensor on the drone mainly used for?
A.Helping the sunlight shine on the crops.
B.Directing the wings to fly over the crops.
C.Examining the different colors of the crops.
D.Recording the sunlight “bands” reflected off the crops.
3. What does the underlined word “it” in paragraph 3 probably refer to?
A.A smartphone.B.A sensor.
C.A drone.D.A band.
4. What is the main idea of the text?
A.Crops will be harvested by drones soon.
B.Drones will be widely used in different fields.
C.French farmers use drones to examine their crops.
D.Farmers develop special drones for their crops.

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【推荐1】Anyone eager to view from high the cityscapes of Guangdong, a province in southern China, may soon be able to do so from the cabin of a flying taxi. On October 13th the Civil Aviation Administration of China (CAAC)awarded a “type certificate”, a crucial piece of aviation paperwork, to the world’s first electric vertical take-off and landing (eVTOL) taxi. And in case that does not sound futuristic enough, the small two-seater, called the EH216-s, was also cleared to fly without a pilot on board.

The EH216-S is made by EHang, a company based in Guangdong. It looks like a scaled-up consumer drone (无人机) with a passenger bubble mounted on top. Propulsion (动力) is provided by 16 small rotors (转子), mounted on the tips of eight arms that fold away when the vehicle is not in use, allowing it to park in small spaces.

The CAAC gave its approval after EHang had conducted more than 40,000 test flights, including with volunteer passengers in 18 cities across China. It also subjected the EH216-S to structural analysis and crash tests, and checked its ability to keep flying if one of its rotors fails. Regulators also inspected the wireless network which EHang uses to link its flying taxis to a control centre on the ground. That allows backup pilots to land an aircraft by remote control if there is a problem.

EHang says its pilotless eVTOLs will be quieter than helicopters, their closest cousins, and much cheaper to operate, thanks in part to the ability to swap (交换) out an expensive pilot, for a second paying passenger. Performance, though, will be limited, at least at first. The EH216-S has a range of about 30 km, and a speed of up to 130 kph. The firm thinks that doing away with pilots will make things safer too. A computer’s attention never wavers (动摇). And flying is, in many ways, much easier to automate than driving, for there are fewer obstacles and unexpected situations to navigate.

EHang has ambitions beyond China, too. The firm’s closest competitors are Volocopter, a German company, and a pair of Californian firms, Joby Aviation and Archer Aviation. All three are conducting test flights of piloted eVTOLs of various designs.

1. What does the underlined word “cleared” in Paragraph 1 probably mean?
A.Produced.B.Approved.C.Removed.D.Tested.
2. What is Paragraph 3 mainly about?
A.What features EH216-S possesses.
B.How strict the standard of EHang is.
C.What benefits pilotless eVTOLs have.
D.How EH216-S gets its approval.
3. What can we infer from the last paragraph?
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D.EHang will improve its design to defeat competitors.
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【推荐2】You are sitting on the desk. A teacher is writing on the blackboard. Kids are yelling in the playground outside. A book falls off the desk next to you. Suddenly, the teacher hands you a pop quiz.

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    4     They see virtual reality technology as a useful tool for learning more about why people act as they do. It could help psychologists deter identify and come up with solutions for behaviors problems, for example.

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4. Who may contribute the most carbon emissions?
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C.First-class passengers on new planes.D.First-class passengers on old planes.
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