So he decided to hit up his school’s 3-D printing equipment and scanned and printed models of his teeth. He
then made non-harmful plastic molds (模子) around them to make 12 sets of braces.
Dudley, who does not recommend attempting any of this at home said that he didn’t ask a dentist for his project. But the student did get information from journal articles and textbooks. And though this was a perfectly
friendly choice to buy braces. He didn’t accept the project just to save money--he was also up for the challenge. “When I r ealized that I could do something that was a little bit special, while proving my skills as a designer
and a maker, and fixing something that was making me self-conscious for actually free, I felt it was more than worth the risk.” he said.
27.Dudley got the information on making a 3-D printed braces from___________.
A．a professional magazine
B．a recent blog post
C．journal articles and textbooks
D．a 3-D printer user
28.Why did Dudley choose a 3-D printer braces over-buying them?
A．He didn’t have enough money.
B．He felt ashamed about his teeth.
C．He studies digital design at school.
D．He wanted to be a famous person.
29.What made Dudley get the idea of using 3-D printed braces?
A．The advice from the dentist.
B．The advice from his friends.
C．His major studies at university.
D．The possibility of making 3-D braces.
30.According to the page, Dudley___________.
A．has got a 3-D printer at his home
B．did the project totally for challenge.
C．made each set of braces cost less than 5 dollars
D．supports others to try making their own 3-D braces
31.The article is mainly about___________.
A．a 3-D printer made braces cheaper
B．A college student made fantastic 3-D braces.
C．digital design major student created 3-D printers
D．3-D braces with non-harmful plastic molds became popular
【答案】
27.C
28.A