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Recently researchers at the University of Zurich are adding a new member to the drone (无人机) family. Unlike most drones whose application is to make selfies (自拍) or transport something, this drone was built with first aid workers and rescue efforts in mind. Disaster sites are rarely of logical shapes and sizes. So having a drone that could change its shape and size to fit through tight spaces on the fly could prove extremely valuable.

As is often the case in experimental robotic projects, researchers met some technical shortcomings at the beginning. The airplane mode of the existing aircraft, such as passenger planes helicopters and the common drones, couldn't meet the demand of different environmental features. Eventually, they turned to animals for inspiration﹣specifically how some birds can fold their wings to fly through narrow passages.

What makes it distinguishing is that when faced with a narrow passage, it can change into an H shape. Or it can shrink itself into an O shape, arms folded into its body. And if that isn't enough it can also transform into a T shape, allowing an on﹣board camera on the central frame to, get as close as possible to its focal object. While the working concept model is impressive, the researchers aren't done with the folding drone yet They want to improve the structure of the drone so that it can fully fold in three dimensions (维度), offering even mare shapes, And they want to create full auto operation﹣a drone that looks at the changing land features in, for example, an apartment building partly destroyed by an earthquake and changes its shape to meet is current needs. Researchers say their final goal is to give the drowse a high﹣level instruction such as "enter that building, inspect every mom and come back" and let it figure out by itself how to do it.Therefore, it's reasonable to hope the new drone will play an important supporting role in disaster rescue.

1.What was the new done initially designed to do?

A.To provide disaster relief.

B.To take air photography.

C.To convey a heavy load.

D.To send a message signal.

2.Where did the researchers get the inspiration?

A.From passenger planes.

B.From small helicopters.

C.From flying creatures.

D.From common drones.

3.What is the drone's biggest advantage?

A.It has a unique shape.

B.It can change its shape.

C.Its arms are flexible.

D.It can reach its target.

4.Which can be the best title for the passage?

A.A Drone: To Fold and Unfold in the Sky.

B.A Drone: To Transport Goods in the Future.

C.A Drone: To Make Selfies for Fun.

D.A Drone: To Make a Difference in Rescue.

高三英语阅读选择中等难度题

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