3D printing technology(技术) may not be a new thing in some foreign countries. But in May this year, at Shenzhen Convention and Exhibition Center(深圳会展中心). Many visitors were attracted by a 3D printer.

  The machine looks similar to an ordinary printer and can print a‘statue’in about 90 minutes after scanning anything, including a person.

  The writer prints layer(层)by layer. For example, if we want to print a 30-cm-tall statue, the computer will calculate the layers and print 460 layers in total. It can also print people and clothes. You can stand for scanning for just about three minutes, and a statue will be finished about two hours. The cost for a statue of a man is about 1000yuan. The printer, which costs about 500,000yuan, is from the USA.

 ‘We want to introduce this technology to people, and find more chances here.’said an engineer, ‘There is a company in USA that offers 3D printing services to people. Many people come to design their own thing. It is very cool. We hope that the printer will encourage more Chinese people to be more creative.’

1. A 3D printer_______.

A. is a common machine          B. prints layer by layer

C. can make clothes and people          D. is widely used in Shenzhen

2. How much should you pay if you want to have a statue of yourself printed?

A. 50,000yuan          B. 1000yuan          C. 500,000yuan          D. 100yuan

3. The engineer showed people the 3D printer to_______.

A. design new things          B. print statues for them

C. introduce this technology and find changes          D. calculate the layers

4. We can find this article in_______.

A, a travel guide        B. a restaurant menu        C. a newspaper        D. a textbook

5. The best title for the passage is_______.

A. A 3D printer made in Shenzhen          B. 3D printing looks for bigger market

C. 3D printing services in the USA          D. Design your own statue


As space science develops, man has learned more and more about space. Space is not only amazing but also dangerous. While working in space, spacemen are facing danger as well as success.

Scientists have found out that the radiation(辐射)is the greatest danger to spacemen in space. When spacemen are working in space, they are in danger of the radiation from the sun and other stars, which is bad for their health. The harm of the radiation won’t be found until their children even grandchildren are born. Some special medicine may work a little, but no really effective medicine has been found so far.

Space rubbish is also thought to be a great danger to spacemen. It’s reported that there were 9,000 man-made things flying in space. About 30% of these are satellites, 10% are spaceships, and the rest are space rubbish. An explosion(爆炸)in space in 1999 made a cloud of 300,000 fragments, each at least 4mm in size. A small piece of these even knocked a spaceship window and caused some damage(损坏).

Scientists are watching and reporting any possible danger all the time. They are working to deal with space rubbish. Although space is really dangerous, it interests many people on the earth. In the near future, it may become possible for people to spend a few days in a space hotel. We may even choose to leave the earth and live in space in a few years. So we should do something to help improve the space environment.

1. The writer mainly wants to tell his readers that the space is full of _____.

   A. rubbish        B. danger        C. satellites         D. radiation

2. How much does space rubbish take up of all the man-made flying objects?

   A. 30%          B. 40%          C. 50%           D. 60%

3. Which of the following statements is true according to the passage?

   A. Some children have been born in space.

   B. People are not supposed to live in space.

   C. Some people are eager to have a space trip.

   D. No one is dealing with space rubbish now.

4. The underlined word “fragments” in the third paragraph probably means _____.

   A. broken pieces    B. flying dust    C. dangerous gases   D. space radiation

5. What is the main purpose(目的)for writing the passage?

   A. To ask people not to pollute the space environment.

   B. To develop people’s interests in space travel in the future.

   C. To tell readers what scientists are doing about space rubbish.

   D. To tell people that space is dangerous and what the dangers are.

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