?I think 3D printing is revolutionizing our world in many ways,” he said. “I believe changing the world of prosthetics is very real. There’s no reason why this approach shouldn’t work on adults either.”

　　1. How Manero got the idea to make a 3D printer arm for Alex?

　　A. He got the idea from his colleagues and friends.

　　B. He learnt it from South Africa.

　　C. He happened to hear a similar story on the radio.

　　D. He was moved by Alex’s story.

　　2. Why Alex couldn’t get a prosthetic arm before?

　　A. There was no prosthetic arms for children.

　　B. The insurance company couldn’t afford the costs.

　　C. His family couldn’t afford it.

　　D. He grew too fast and had to replace it frequently.

　　3. What will Manero do next?

　　A. Sell 3D printer arms to other people.

　　B. Study electrical, mechanical and civil engineering.

　　C. Donate another arm to Alex.

　　D. Work 3D printer technology on adults.

　　4. What words can best describe Manero?

　　A. Friendly and open-minded.

　　B. Kind-hearted and brilliant.

　　C. Honest and stubborn.

　　D. Determined and ambitious.

　　答案与解析

　　【文章大意】

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