A kind of new houses in California is selling quite fast. In a short time, people buy 82 ones and they need 1000 more. And the factories will build them soon—for they are able to build one in less than 24 hours.
Why can they do it so fast? Because 3D printing (打印) helps to make it. 3D printing not only builds a house with less time, but also costs less and is more environmentally (环境上) friendly. And there are different styles of 3D printed houses for people to choose.
3D printing is developing (发展) very fast. But there are some problems with 3D printed houses. First, the house “printed” out may not be strong enough. Second, while building houses layer by layer (逐层地), there may be some differences between layers. Some layers may be a little thinner or thicker than others. Finally, there are now fewer types of 3D printing materials (材料) for us to use.
However, the future of 3D printed houses is promising. In India, there are not enough houses. The country wants to use 3D printing to solve the problem. If successful, buildings by 3D printing may go popular. We can also use it to build offices and other buildings. NASA wants to use 3D printing to build something on Mars and the Moon.
【小题1】How does the writer begin the passage?
| A．By giving his advice. | B．By showing a fact. |
| C．By telling his story. | D．By asking a question. |
【小题2】What do we know about 3D printed houses?
| A．It needs less time to build the houses. | B．It costs too much to build the houses. |
| C．The style of 3D printed houses is the same. | D．3D printed houses are bad for the environment. |
【小题3】We need to solve ________ problems with 3D printed houses.
【小题4】The underlined word “
promising” probably means ________.
| A．充满失望的 | B．令人担心的 | C．令人惊喜的 | D．充满希望的 |
【小题5】What’s the best title of the passage?
| A．Features of 3D Printed Houses | B．Uses of 3D Printed Houses |
| C．Introduction of 3D Printed Houses | D．Future of 3D Printed Houses |
