新乡市2014-2015学年上期期末高二试卷

新乡市2014-2015学年上期期末高二试卷

D. the author preferred warm smiles to polite smiles

In the early 1980s, an engineer Chuck Hull approached his boss with an idea :to build a machine that prints our objects you can hold in your hand .His manager reminded him that the company produced UV lamps,not machines that were able to make copies of various things .But at last the two men reached an agreement :Hull would devote himself to the company ’s lamps by day ;at night he’d create his dream machine.

It was the UV lights that gave Hull his breakthrough in the first place.The lamps were used in factories to harden a veneer(薄片鑲飾).Hull realized that he could use UV lights to cut plastic layers into whatever shape he liked and then plie these layers to form a 3-D object .Then he had to write programs to tell his machine how to cut each layer,a painful pross.Eventually hia first 3-D printer was put together , looking like some of the equipment they used in that movie Waterworld(a story taking place in the year 2500) But by the mid-1980s,theprinter had developed into a working machine,though it cost hundreds of thousands of dollars.Because the printer was too heavy to carry to exhibitions,Hull made home movies to show to bosses. ―The movies were pretty boring,‖but even so ,he says,―we got an enormous response .‖Particularly in Detroit. ―Back then ,the US car industry had fallen behind Japen . Hull says,, and the car companies were eager for a secret weapon . The 3—Dprinter was just that:Englishs could create their own models for devies such as door handles, rather than sending plans to a particular workshop, saving motnths during the design process. Now that the technology is becoming affordable (printers start at 1,299dollars ),all kinds of people have caught 3-Dfever.A professorfrom University of California is working on printing out an entire house . Another 3-D artist has made a ―robotic hand‖that lets his son, who was born without several fingers, pick up a water bottle . More disturbing, a group claims to have printed out a working gun from open –source plans ―A nything that can be made will be made by anyone

5. What is the text mainly about ?

A famous American engineer. B. The advantages of 3-D printing.

C. How UV lamps were produced D, How 3-D printers were invented

6. According to P aragraph 2,the 3-D printer

A . prints out things layer by layer B. was first used to print furniture

C. appeared in the movie Wateroworld D. uses UV lights to harden printed things

7. Why did the Detroit car companies show great interest in Hull’s invention?

A. They were impressed by Hull’s ability to make movies .

B.They wanted to improve thire car industry

C.They hoped to print out a who;e car with the technology

D.They needed to produce cars that were safe from weapon attacks.

8. Joris Peels will probably agree that