C

Imagine having an idea, drawing it on paper, bringing it to a store and seeing it turned into a physical object.This is now possible with the help of 3D printers.Such machines were once used just by universities and big companies.But now, stores with 3D printing services are appearing around the United States.

Bryan Jaycox and his wife opened The Build Shop LLC in Los Angeles two years ago.The store is filled with tools like a laser cutter, an industrial sewing machine and 3D printers.Bryan Jaycox requires $ 15 an hour to print an object.He also charges a fee depending on the size of the object and up to $ 50 an hour for design and labor services.

The Jaycoxs also offer 3D printing classes for anyone who is interested.One of the students in a recent class was Ki Chong Tran.He plans to open a 3D printing business in Cambodia."The demand has been amazing.It's been much more than I would have imagined," said Ki Chong Tran.

"I think 3D printing is going to be huge. It's going to make a huge impact on society as a whole," he added.

Mr Jaycox predicts that within five years, 3D printing technology could become

more consumer friendly.

But Ki Chong Tran says even current technology can make a difference in a developing country like Cambodia."With 3D printing you can give them tools, and you put it in their hands so they are responsible more for their own development.

They learn skills beyond just learning English and becoming a tour guide or something like that or working at a bank.You can actually create things that give value to the world," said Ki Chong Tran.

He says it's not just Cambodia but anywhere where there is a 3D printer, it can turn a good idea into reality.

1.We learn from Paragraph l that 3D printing_________.

A. is now available to ordinary people

B.first appeared in the United States

C.can turn your every dream into reality

D.is now only used by universities

2.Bryan Jaycox opened The Build Shop LLC to__________.

A.sell 3D printers and different kinds of tools

B.produce all types of printing machines

C.offer 3D printing classes and services

D.design different types of 3D printers

3.In Mr Jaycox's opinion, within five years 3D printing will_________.

A.make it easier to do business

B.be accessible to all consumers

C.change the way of social contact

D.bring about more profits to the sellers

4.How will 3D printing technology benefit developing countries according to the text?

A.It helps the people work efficiently at a bank.

B.It will promote the learning of English

C.It will accelerate the development of tourism.

D.It offers them a new way of development.

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It’s such a happy-looking library, painted yellow, decorated with palm-tree stickers and sheltered from the Florida sun by its own roof. About the size of a microwave oven, it’s pedestrian-friendly, too, waiting for book lovers next to a sidewalk in Palm Beach Country Estates, along the northern boundary of Palm Beach Gardens.

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Son Austin, now a 10th-grader, didn’t see the point of building a library that resembles a mailbos. But Janey insisted, and husband Peter unwillingly got to work. The 51-year-old owner of a ship supply company modified a small wooden house that he’d built years earlier for daughter Abbie’s toy horses, and made a door of glass.

After adding the library’s final touches(裝點(diǎn)), the family hung a signboard on the front, instructing users to “take a book, return a book,” and making the Henriksen library, now one of several hundred like it nationwide and among more than 2,500 in the world, the only Little Free Library in Palm Beach county.

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The project’s best payoff, says Peter, are the thank-you notes left behind. “We had no idea in the beginning that it would be so popular.”

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