13．
Have you ever had dreams about building a robot？Or putting together a spaceship？Or even seeing your face made out of chocolate？Done．All you need is a 3-D printer!
The possibilities of 3-D printing seem endless．All the user has to do is to design（设计） an object on the computer and choose a material（材料） to print in．The printers print in hundreds of different materials including glass，sugar and even skin!When the user presses"print"，the 3-D printer spreads the material layer（层） by layer and like magic the object is produced．
The first 3-D printer was invented in 1986by an American，Charles Hull．But 3-D printing has only become cheap enough recently for most people to use．Designers now use 3-D printing to create unusual things．The Dutch artist Dirk Vander Kooj prints furniture made from old fridges．And doctors have used 3-D printing to print human body parts!The Telegraph reported in February that scientists from Cornell Medical College even printed a man-made ear．
But like a lot of new technologies，if 3-D printing gets into the wrong hands，it can be dangerous．In 2011a group of four men in the US used 3-D printing to produce ATM skimmers （提款机盗刷器）．These were placed on an ATM and stole over $400，000from users of the ATM．It is terrible to think that criminals like them might one day use a 3-D printer to print a gun．
But for better or for worse，3-D printing has been put into use．In a few years，you'll probably be wondering how you could ever live without your 3-D printer!
61．A invented the first 3-D printer．
A．Charles Hull
B．Dirk Vander Kooj
C．A doctor called Cornell
D．Four men in the U．S
62．What is the correct order for people to use a 3-D printer？B
a．Choose a proper material．b．Press the print button．
c．The 3-D printer spreads the material．d．Use a computer to design an object．
A．a-b-c-d
B．d-a-b-c
C．a-c-d-b
D．d-c-b-a
63．The underlined word"criminals"in the fourth paragraph might meanC in Chinese．
A．技术员
B．军人
C．罪犯
D．用户
64．According to the passage，people have NOT yet producedD with a 3-D printer．
A．some furniture
B．a man-made ear
C．ATM skimmers
D．a gun
65．What does the writer think of the 3-Dprinter？B
A．It is necessary only for our work．
B．It is helpful but dangerous．
C．It is too expensive for most people．
D．It is useless in our daily life．
